93results about How to "Convenience filler" patented technology

Zinc oxide and / or zinc carbonate coated particles, methods of coating particles with zinc oxide and / or zinc carbonate, and various applications of such coated particles, including applications in cosmetics, rubber, and other polymer materials, are disclosed. As compared to rubber formulations with zinc oxide and core materials added separately, formulations including the present coated particles may have a higher transparency, lower Mooney viscosity and lower minimum torque, improved dispersability, a higher modulus at 100% and / or at 300% elongation, a higher tensile strength, better aging resistance, better abrasion resistance, lower density, and / or lower heat build up. Thus, products containing the present coated particles may enjoy similar or better properties than comparative products that include a conventional filler and / or zinc oxide per se, and the present coated particles may result in cost savings for the corresponding product formulations.

The invention discloses an automatic encasement system for Lilezuan milk bag gift boxes. The automatic encasement system comprises a milk bag integration conveying line (1), a milk bag robot (2) and a milk bag unit conveying line (4), wherein a milk bag clamp (3) at the lower end of a manipulator of the milk bag robot (2) catches a milk bag unit on the milk bag integration conveying line (1) and pushes the milk bag unit into a corresponding milk bag unit separation slot (41) under the condition that the milk bag unit is in a horizontal state; then a small baffle plate insertion machine (5) inserts a small baffle plate into a middle clearance of the milk bag unit, and a horizontal pushing mechanism (6) is used for horizontally pushing the milk bag unit with the inserted small baffle plate into a packaging case already provided with a large lining plate on a packaging case conveying line (9); finally the packaging case already provided with the large lining plate, the small baffle plate and the milk bag unit is covered and encased to finish the whole automatic encasement process. According to the automatic encasement system for the Lilezuan milk bag gift boxes, the milk bag encasement operation is creatively changed from vertical encasement into horizontal encasement, so that the production operation is more stable, the maintenance is easy and convenient, and the workload can be reduced to the maximum extent.

An application of waste brick in treating sewage is dislcosed, which features that the leftover of brick is mechanically broken to become the granular adsorbent of harmful element (P, etc) in sewage. Its advantages are high adsorptive ability and low cost.

The invention relates to a method for preparing monodisperse silver-coated microspheres, and belongs to the fields of silver-coated microspheres, electronic connecting materials and the like. The method comprises the following steps of: preparing monodisperse melamine formaldehyde resin (MF) microspheres by using a dispersion polymerization method; roughing, sensitizing, activating and chemically plating a nickel metal and a silver metal by taking the microspheres as mother spheres so as to obtain the monodisperse silver-coated MF microspheres. The MF mother spheres have the advantages of simple and reliable preparation process, high efficiency, controllable grain size, good monodispersibility and the like. Because the MF microspheres contain active groups such as amino acid, hydroxyl and the like, the coat is complete and high in binding force, the grain size of the silver-coated microspheres can be controlled in a range of 1.0-3.9mu m, the dispersion coefficient epsilon is 0.045-0.067, the monodispersibility is high, the decomposition temperature is about 300DEG C, and the thermal stability is high; moreover, the preparation method is simple and high-efficiency, has the advantages of industrial production, and has good application prospect in the fields of electronic connecting materials such as anisotropic conductive adhesives and the like.

The methods and compositions disclosed herein describes a solution containing at least one block co-polymer that is a liquid at lower temperatures and transitions to a gel at higher temperatures. The compositions are useful, for example, as an alternative to saline or silicone-gel as fillers for prostheses.

The invention discloses a road repairing device, and belongs to the technical field of road repairing. The road repairing device comprises a vehicle body, a breaking and flat ramming mechanism, an asphalt filling mechanism and a compacting roller, wherein the breaking and flat ramming mechanism, the asphalt filling mechanism and the compacting roller are sequentially mounted on the vehicle body from the front end to the rear end in the marching direction of the vehicle body; the breaking and the flat ramming mechanism comprises a flat ramming gravity plate, and a drill bit which is fixed to the lower surface of the flat ramming gravity plate; the upper part of the flat ramming gravity plate is connected to a vibrating motor; a rotating shaft and a sector turntable which is fixed to one side of the rotating plate are arranged right above the vibrating motor; an arc-shaped hole is formed in the sector turntable; a moving rod which vertically passes through the arc-shaped hole is arrangedin the arc-shaped hole; a connecting rod is connected between the moving rod and the vibrating motor; two ends of the connecting rod are correspondingly hinged with the moving rod and the vibrating motor. According to the road repairing device, a broken and old pavement can be hammered and vibrated to realize combined breaking through one mechanism, and the broken pavement can be completely rammed, levelled and compacted; in addition, related acting strength is high; the breaking effect and the flat ramming effect are good.

A battery separator has performance enhancing additives or coatings, fillers with increased friability, increased ionic diffusion, decreased tortuosity, increased wettability, reduced oil content, reduced thickness, decreased electrical resistance, and / or increased porosity. The separator in a battery reduces the water loss, lowers acid stratification, lowers the voltage drop, and / or increases the CCA. The separators include or exhibit performance enhancing additives or coatings, increased porosity, increased void volume, amorphous silica, higher oil absorption silica, higher silanol group silica, reduced electrical resistance, a shish-kebab structure or morphology, a polyolefin microporous membrane containing particle-like filler in an amount of 40% or more by weight of the membrane and ultrahigh molecular weight polyethylene having shish-kebab formations and the average repetition periodicity of the kebab formation from 1 nm to 150 nm, decreased sheet thickness, decreased tortuosity, separators especially well-suited for enhanced flooded batteries.

The invention relates to a grounding electrode in a lightning protection grounding system of a power station, a transformer grounding network, a high-voltage power transmission line iron tower, an electrified railway grounding system, a wireless communication transmitting tower, a transformer neutral point, a high-rise building, a large computer and a microelectronic equipment system equipment center. The grounding electrode comprises a grounding electrode main body which is a thick-walled and seamless steel tube; the thickness of the wall of the steel tube is more than 8-10mm, the inner wall and the outer wall thereof are provided with an anti-corrosion conducting film, the lower end thereof is provided with a sealing head, the top end thereof is provided with an openable packing port, and the wall thereof is provided with a releasing hole; and the steel tube is externally provided with an external packing with good electric conduction, corrosion prevention and water permeability, and an interface connected with the grounding network and an equipment grounding lead. The grounding electrode has convenient and fast installation and construction, good resistance-reducing effect and convenient maintenance with the service life thereof of being not lower than that of the grounding equipment, and is a grounding electrode which not only meets the anti-corrosion function of the grounding electrode in the grounding network, but also reduces the grounding resistance performance of the grounding electrode.

The invention belongs to the field of chemical synthesis and relates to a method of synthesizing a carbon nanomaterial doped polyvinyl alcohol / sodium alginate gel ball adsorbent. The method comprisesthe following steps: adding carbon nanomaterial powder into water to obtain a carbon nanomaterial water disperse system; adding sodium alginate and polyvinyl alcohol into the water disperse system toobtain a mixed water disperse system; dropwise adding the mixed water disperse system into a boric acid-calcium chloride mixed solution to obtain the carbon nanomaterial doped polyvinyl alcohol / sodiumalginate gel ball adsorbent. According to the invention, the raw materials are easily available, the cost is relatively low, and the biocompatibility is strong; the production method is simple and easy, can realize continuous operation and is suitable for large-scale production; the product has a good adsorption effect, is easy to collect and recycle and avoids environmental pollution.

The present invention relates to a novel multi-functional nanocomposite additive made from rare earth element complex modified organic clay which is called MFNA and methods for making and using the same, particularly in applications of coating manufacture industry. Such MFNA-modified coatings have desired features and improved physical and mechanical properties comparing the current available coatings.

The invention discloses an anaerobic tank sealing deodorization cover for rural domestic and breeding sewage treatment and a treatment method of the anaerobic tank sealing deodorization cover. A deodorization cover is arranged at the top of an anaerobic tank, a treatment device is arranged on the deodorization cover and comprises a gas collecting hood, an efficient biofiltration deodorization layer and an adsorptive deodorization layer from bottom to top; an automatic spray device for spraying a deodorization agent or a biological nutrient solution onto the deodorization cover is arranged at the top of the deodorization cover. By means of the anaerobic tank sealing deodorization cover, the operation difficulty of rural domestic sewage odor treatment can be reduced, labor investment can bereduced, the use enthusiasm of farmers can be raised, and the pollution to the environment and atmosphere can be effectively reduced.

The invention relates to a multifunctional pile foundation model testing system and an assembling and testing method thereof. The multifunctional pile foundation model testing system comprises a base, guide rails, a model frame, a loading system, a measuring system, a collecting device and a prefabricated pile body. The loading system comprises a loading device and a reaction frame and can achieve automatic control and set the load and the loading time autonomously. The measuring system is composed of different kinds of measuring equipment including an earth pressure cell, a sensor and a strain gauge. The collecting device can achieve automatic collecting and is connected with a digital display system. The digital display system comprises software which can provide data tables and has an automatic curve drawing function. The testing system is easy to operate, rich in function and capable of researching bearing characteristics of single piles and pile groups under different conditions, in different bearing stratums and of different types. Obtained results are more accurate, settlement data can be effectively measured, the process that the bearing characteristics of a pile foundation are achieved can be successfully simulated in the actual process, and effective reference bases are provided for guidance of pile foundation design and pile foundation bearing characteristic theory research.

The invention discloses a ceramic-polymer composite material. The ceramic-polymer composite material comprises a polymer matrix and microwave medium ceramic powder filler, wherein the ceramic powder filler is any one or a mixture of any two of (A0.5-2xBi0.5)BO4-x, (Bi1.5C0.5-y)ZnO.5Nb1.5O7-y and (A0.5-2xBi0.5)BO4-x@TiO2 or (Bi1.5C0.5-y)Zn0.5Nb1.5O7-y@TiO2 ceramic powder with a core-shell structure, which is formed by coating a ceramic surface with TiO2. The composite material has relatively low dielectric loss (tan sigma being less than or equal to 0.2) within a microwave frequency band, has a dielectric constant temperature coefficient adjustable within a range of + / -100ppm / DEG C, and is a very valuable embedded type composite material for capacitors.

The invention discloses a water combustion boiler which comprises a boiler with an inner cavity. A boiler door is formed in the wall of the boiler, a water jacket is nested in the inner cavity of the boiler, the inner wall of the boiler is used as the outer wall of the water jacket, and a water storage cavity is formed between the inner wall of the water jacket and the inner wall of the boiler; a combustion chamber is formed by the inner wall of the water jacket in an enclosed manner; a ventilation system, water inlet pipes, a steam exhaust pipe, a smoke vent and a steam supply pipe are respectively fixedly arranged on the outside of the boiler, the ventilation system is communicated with the combustion chamber, the water inlet pipes are communicated with the water storage cavity, the steam exhaust pipe and the smoke vent are communicated with the inner cavity of the boiler, and the steam supply pipe is simultaneously communicated with the combustion chamber and the top of the inner cavity of the boiler; an ignition system and a combustion-supporting carrier are fixed into the combustion chamber. The water combustion boiler has the advantages that large quantities of electrons can be released by metal atoms of the combustion-supporting carrier at high temperatures, heat can be released, and hydrogen decomposed from steam can be assisted to be combusted, so that a large quantity of heat can be released; the water combustion boiler is suitable to be used as heating equipment and applicable to modification projects of coal combustion boilers, gas combustion boilers and oil combustion boilers in the fields of power plants and heating, the industrial and agricultural fields and the like, the steam and other fuel can be combusted jointly to generate the heat, so that fifty percents of fuel can be saved on the premise that the same quantity of heat is provided.

The invention discloses an automatic feeding and discharging stirrer for building. The automatic feeding and discharging stirrer for building comprises a stirring tank bracket and a conveying mechanism bracket; a stirring tank is fixedly supported on the stirring tank bracket, and a tank cover is arranged on the stirring tank in a sealing and covering mode; a stirring motor is fixedly welded to the upper surface of the tank cover, and a stirring driving gear is fixedly welded to the upper end of an output shaft of the stirring motor; the inner side of the stirring driving gear meshes with a stirring shaft gear, a hollow stirring shaft is fixedly inserted into the middle of the stirring shaft gear in a penetrating mode, and the lower end of the hollow stirring shaft penetrates into the stirring tank; and a plurality of stirring rods are fixedly arranged on the surface of the hollow stirring shaft, and a plurality of stirring branch rods are fixedly connected to the upper surface and thelower surface of the stirring rods. According to the automatic feeding and discharging stirrer for building, the output shaft of the stirring motor rotates to enable the hollow stirring shaft to rotate at high speed, water flows out from water outlets of the stirring branch rods while materials are stirred by the stirring rods at high speed, and therefore concrete is stirred quite efficiently andfully.

The invention discloses a method for preparing calcium carbonate from a flame-retardant PVC (polyvinyl chloride) sheet material. The method comprises the following steps: limestone is added into a pulverizer to be pulverized until the particle size is equal to or smaller than 0.25 mm, and calcium carbonate coarse powder is obtained; the calcium carbonate coarse powder is added into a grinder, thena compound surface treating agent consisting of hydrogenated castor oil isostearate and rapeseed oil fatty acid alkanolamide borate is added into the grinder to be ground to obtain calcium carbonatefine powder; and the calcium carbonate fine powder is transferred into a high speed mixer, and then a secondary modifier consisting of hexaphenoxy cyclotriphosphazene and polyaminopropyl methyl silsesquioxane is added into the high speed mixer to be mixed at a high speed uniformly, and drying is carried out to obtain the calcium carbonate for the PVC sheet material. The calcium carbonate obtainedby the invention is high in dispersibility, has high compatibility with PVC resin and wood powder, improves the interfacial adhesion of a PVC wood-plastic sheet material reaction system, improves themechanical properties of a composite material and the attractive appearance of an embellished product, is capable of endowing the PVC sheet material with relatively high processing properties, is relatively high in flame retardance and heat resistance, and can be widely used as an excellent PVC sheet material filler.

The invention provides a concrete preparing, mobile filling and vibrating integration device and method. The integration device comprises a base and a control desk. Sliding rails are arranged on the base. A vibration table capable of moving along the sliding rails is arranged on the sliding rails. A three-dimensional motion working platform is arranged on the base and can drive a machine base to move on the base. A stirrer is arranged on the machine base. A filling machine is arranged at a discharge port of the stirrer. An outlet of the filling machine faces the vibration table. The control desk is used for controlling the vibration table and the three-dimensional motion working platform to move so as to control the filling position, the filling height and / or vibration parameters.

The invention discloses a raw material screening device for roller production. According to the device, cast iron raw materials are placed in a storage hopper; a motor I is started to drive a conveyorbelt and a baffle to rotate; the baffle brings the raw materials in the storage hopper to a high position; a motor II is started to drive a gear I to rotate; the gear I is meshed with a half gear todrive the half gear to rotate; the half gear drives a transmission shaft to rotate; the transmission shaft drives a discharging groove to rotate, so that the discharging groove reaches the upper portion of an outer cylinder; by driving the discharging groove to rotate, in the working process of the outer cylinder, the discharging groove and the outer cylinder cannot make contact with each other, so that equipment can run more smoothly and cannot be damaged while the outer cylinder can be filled with materials conveniently; the motor is started to drive a rotating disc to rotate so as to drivethe outer cylinder to rotate, and each outer cylinder is filled with the materials; and after the filling is completed, the discharging groove is withdrawn. According to the invention, manual conveying of raw materials is avoided, only one outer cylinder is used for impurity removal, and the working efficiency is low.

The invention discloses a direct-heating hot water boiler which is composed of a boiler body, a fume pipe, a combustor, filler, a chimney and the like. The boiler body is of a vertical cylindrical structure and is divided into a filler chamber and a water storage chamber through a supporting partition plate. The fume pipe is located on the middle lower portion of the water storage chamber. Heat dissipation fin plates are installed on the outer wall of the pipe, and the heat exchange area can be increased. An exhaust pipe is assembled to the upper portion of the filler chamber, so that smoke is exhausted upwards evenly. A water blocking cap is used for preventing water from entering the fume pipe. An inlet water distributor is arranged in the filler chamber, so that water is sprayed downwards evenly. Through a temperature-resistant filtering cotton plate, residual water in the smoke can be filtered out and returned back to the water storage chamber. According to the direct-heating hot water boiler, the one cavity design is adopted, the structure is compact, and materials are saved and are about one quarter those of an ordinary boiler; the size is small, the space is saved, the manufacturing cost is low, through the structure, secondary heat exchange can be conducted, and the heat efficiency reaches 97% or over; and smoke exhaust indexes are higher than national standards, the smoke exhaust temperature is lower than 50 DEG C, and the heat efficiency is greatly improved.

The invention relates to polymer rubber materials, and discloses a terafluoroethylene-propylene rubber composition resistant to the hydrogen sulfide corrosion and an application thereof. The terafluoroethylene-propylene rubber composition is prepared from the following raw materials in parts by weight: 100 parts of terafluoroethylene-propylene rubber, 1-3 parts of a crosslinking agent, 1-8 parts of an accelerator, 1-5 parts of an acid absorber, 1-15 parts of carbon nanotubes, 40-60 parts of filler, and 1-3 parts of a processing auxiliary agent. The terafluoroethylene-propylene rubber composition resistant to the hydrogen sulfide corrosion has excellent anti-implosion performance, anti-extrusion performance, and excellent high-concentration hydrogen sulfide corrosion resistance, and the low-temperature resistance is also greatly improved.

The invention discloses a preparation method of nano calcium carbonate for anti-sagging PVC (polyvinyl chloride) plastifying paste. The method comprises the following steps of: pretreating suspension liquid by using a phosphoric acid compound; compounding the pretreated suspension liquid into a surfactant by using fatty acid saponification liquid, polyethylene glycol, fatty acid methyl ester sodium sulfonate and alkylphenol polyoxyethylene ether phosphate monoester to obtain a modified nano calcium carbonate suspension; and finally, carrying out filter pressing, drying and sieving to obtain the anti-sagging nano calcium carbonate for the PVC plastifying paste. According to the method, after the PVC accelerating paste is filled with the nano calcium carbonate, the nano calcium carbonate has relatively good sagging performance, flowability, viscoelasticity, dispersity, impact resistance and stability, and the nano calcium carbonate can be used as an excellent automobile chassis filler.

The invention provides a fused magnesite smelting magnesite briquette and a preparation method thereof. The fused magnesite smelting magnesite briquette is in an ellipsoid and comprises the following raw materials in percentage by mass: 5%-40% of an inorganic bonder, 0.001%-0.05% of a macromolecular bonder and the balance of magnesite powder. The invention also discloses a preparation method of the fused magnesite smelting magnesite briquette. The bonder selection, bonder consumption and briquetting pressure of the briquette are optimized; the bonder is efficient and harmless; the fused magnesite smelting magnesite briquette is prepared by the steps of mixing and kneading, compacting, and forming; the briquette is in the ellipsoidal shape; a complete briquette preparation process which is suitable for fused magnesite production and takes the magnesite powder as the raw material is formed.

The invention relates to a solid motor nozzle blank assembly. The solid motor nozzle blank assembly is characterized in that the solid motor nozzle blank assembly is composed of a guide ring blank, aheat insulation body and a nozzle body blank; the outer surface of the heat insulation body is consistent with the inner surface of the nozzle body blank, and the diameter of the lower section of theinner surface of the heat insulation body is the same as that of a positioning step hole; the upper end of the heat insulation body is consistent with the outer surface of the guide ring blank, and the portion, between the end surface of the positioning step hole and the small end surface of the guide ring blank, of the inner surface of the heat insulation body is in a continuous and smooth trumpet shape from small to large; and the material of the heat insulation body is a high silica cloth / phenolic aldehyde combination, the forming pressure ranges from 20 MPa to 28 MPa, the materials are placed on an oil press equipped with upper and lower heating plates and is heated to 160-170 DEG C, the heat is preserved and the pressure is maintained for 8-10 minutes, and then a mold is removed. According to the solid motor nozzle blank assembly, the surface of a nozzle body is covered with a layer of heat insulation body with ablation resistance and good heat insulation performance, so that thedefect that the inner wall of a solid motor nozzle is likely to be ablated under the action of high temperature of tail gas is overcome, and the service life of the solid motor nozzle is prolonged.

The invention discloses a fruit food packaging way which comprises the following steps: clamping a packaging bag through a clamp, increasing a charge hole of the packaging bag through bag opening equipment, wherein the bag opening equipment comprises drive equipment and adsorption equipment, the drive equipment is connected to the adsorption equipment, the drive equipment drives the adsorption equipment to move, the adsorption equipment comprises a sucking disc, a fixed frame and a barrel body with a cavity, the fixed frame is fixedly arranged on the surface of the sucking disc, the fixed frame is fixedly connected to the barrel body, one end of the barrel body and the sucking disc are in a communication state, a sealing plug is fixedly connected to a rack, a drive motor drives a pinion torotate, a limiting bracket is further fixedly mounted on the fixed frame, and the rack is sliably connected to the limiting bracket; controlling a hopper to lift by a lifting mechanism, extending thehopper into the packaging bag through the charge hole of the packaging bag, and loading the packaging bag through the hopper; and sealing the opening of the loaded packaging bag. The fruit food packaging way is various in functions, and processes the opening of the packaging bag in a production process, so that food packaging efficiency is improved.

The invention relates to a jig for welding, in particular to a jig special for laser welding. The jig special for laser welding is provided with a base plate, a strip-shaped protective gas groove allowing protective gas to enter in order to obtain protective atmosphere in the welding process is formed in the base plate, clamping plates used for fixing materials to be welded to the base plate are arranged on the base plate, and the clamping plates are detachably fixed to the two sides of the protective gas groove. The cross section of the protective gas groove is in an arc shape, and one end, close to the protective gas groove, of each clamping plate is arranged in a step shape. Accordingly, impurities like accumulated welding slag in the protective gas groove due to long-term use can be cleared out easily, and the impurities can be cleared out through slight blowing or striking the base plate by enabling the protective gas groove to be erected. In addition, one end, close to the protective gas groove, of each clamping plate is arranged in the step shape, compared with a traditional laser welding jig, the jig special for laser welding has the advantages that padding on welding joints of the materials to be welded is further facilitated through the step-shaped clamping plates, and light spot gathering in the process of laser welding is facilitated.

The invention relates to the technical field of plastic processing, in particular to a reprocessed plastic device. The reprocessed plastic device comprises a base, a drive mechanism, an extrusion mechanism, a rotary cooling mechanism and a pelletizing mechanism. A supporting table is arranged on the base. The extrusion mechanism comprises an extrusion assembly, an extrusion barrel is arranged at the end, away from the drive mechanism, of the extrusion assembly, and multiple extrusion films distributed along the circumference of the extrusion barrel at equal distance are arranged on the extrusion barrel. The rotary cooling mechanism comprises a cooling tank and a heat exchange assembly, and penetrating pipes in one-to-one correspondence to the extrusion films are arranged in the cooling tank. The pelletizing mechanism comprises a pelletizing barrel, one end of the pelletizing barrel is connected with the end, away from the extrusion barrel, of the cooling tank, one end of each penetrating pipe extends towards the interior of the pelletizing barrel, a rotary cutting knife capable of rotating along the axis of the pelletizing barrel is arranged in the pelletizing barrel, and a discharging hopper is arranged at the bottom of the pelletizing barrel. According to the technical scheme, when plastic is cooled, water can form circulating water, cold water is constantly injected, pollution is reduced, and production efficiency is improved.

The invention discloses an electrocatalytic oxidation filler, a preparation method thereof and a three-dimensional electrocatalytic oxidation device. The electrocatalytic oxidation filler is preparedby mixing a mixture of clay minerals and a curing agent and a mixed solution of Cu < 2 + > / Mn < 2 + > and roasting. The three-dimensional electrocatalytic oxidation device comprises an anode, a cathode and an electrocatalytic oxidation filler filled between the anode and the cathode. The electrocatalytic oxidation filler provided by the invention has the advantages of good conductivity, low energyconsumption, high stability, strong catalytic activity, no need of supporting electrolyte and the like, is widely applied to treatment of industrial wastewater as a filler of a three-dimensional electrocatalytic oxidation device, can realize effective removal of organic pollutants in the wastewater, and has relatively high use value and relatively good application prospect. The preparation methodof the filler has the advantages of being simple in process, convenient to operate, easy to control, low in raw material cost, low in energy consumption, short in consumed time, environmentally friendly and the like, is suitable for continuous large-scale batch production, facilitates industrial utilization and shows a good application prospect.

The invention discloses an oxalic acid feeding machine. The oxalic acid feeding machine comprises a charge mechanism, a feeding mechanism and a gas transmission mechanism, wherein the charge mechanism comprises a funnel-shaped storage box, a box cover covering the upper port of the storage box in a sealing manner, a vertical barrel-shaped connection piece communicating with the lower port of the storage box, and a horizontal sleeve arranged at the bottom end of the connection piece, a filler connector is arranged in the box cover, and a discharge port communicating with the connection piece is arranged in the upper end surface of the horizontal sleeve; the gas transmission mechanism comprises a sublimation box, heating wires arranged at the bottom in the sublimation box, and a partition covering the heating wires, a gas inlet connector used for connecting nitrogen gas and a gas outlet connector connected with the interior of a degreasing furnace through a gas channel are arranged in the sublimation box respectively, a feeding port is formed in one side of the sublimation box, and one end of the sleeve is installed on the feeding port in a communication manner; and the feeding mechanism comprises a movable block movably connected in the sleeve in an insertion manner, and a receiving hole penetrating through from top to bottom is formed in one end facing the feeding port, of the movable block. The oxalic acid feeding machine disclosed by the invention realizes supply of a gaseous oxalic acid catalyst, so that the degreasing furnace decomposes polyformaldehyde by taking gaseous oxalic acid as the catalyst.