44results about How to "Uniform shrinkage" patented technology

The present invention relates to a wheel-like braking disc production method and a wheel-like braking disc produced by using the wheel-like braking disc production method. According to the present invention, during the wheel-like braking disc casting process, an integral and annular rib plate is additionally arranged on the heat dissipation rib top surface of the heat dissipation surface of a braking disc, the annular rib plate and the braking disc are subjected to one casting molding, and the heat dissipation rib top surfaces are connected one by one to form a stable annular frame structure with double rings arranged on the upper surface and the lower surface; during the cooling solidification process after the casting, the annular rib plate on the heat dissipation rib top surface is firstly solidified so as to fix a heat dissipation rib, such that the shrinkage is significantly uniform when the cast is cooled, and the warping deformation generated due to the asymmetric geometrical size of the cast can be avoided; the machining allowance top surface of the friction surface of the braking disc is designed into to a tapered surface so as to increase the cast deformation resistance and make the cast maintain the stabilized shrinkage; and after the cooling molding, the annular rib plate is removed through the machining and the machining allowance top surface of the friction surface is processed into the plane, such that the cast structure shape is not affected, and the product dynamic balance detection qualification rate is substantially improved.

The invention relates to precision casting wax. The precision casting wax comprises the following ingredients, by weight, 80-90% of PE wax, 4-10% of polystyrene, 4-10% of eleaostearic acid and 0.2-0.4% of white carbon black, and the mass percent sum of the precision casting wax is 100wt%. During the CAD precise processing of the precision casting wax, re-fusion and wire drawing phenomena in a small-sized scope are reduced obviously, and the effects of the precision casting wax with PE wax as base wax and used for CAD precise processing are improved obviously. The internal components of the precision casting wax are uniform, the shrinkage of each part is uniform, and the wax block quality is raised.

The invention discloses a fabric treatment device with dissolving and hot-melting functions. The device comprises an unwinding roller, a dissolving treatment device, a washing device, a drying room, a hot-melting treatment device and a material collecting roller. The dissolving treatment device comprises a dissolving tank, a dissolving press roller and a jet pipe. The washing device comprises a washing tank and a plurality of washing press rollers. The hot-melting treatment device comprises a hot melting cylinder and a hot pressing roller matched with the hot melting cylinder. By means of the fabric treatment device, fabric can obtain a stable fabric structure through dissolving and hot-melting treatment, the fabric is soft in touch, even in shrinkage rate, smooth in surface, and a through hole variation range is large. By means of the dissolving treatment device, the washing device, the drying room, the hot-melting treatment device and the material collecting roller which are arranged sequentially, industrial production of the fabric can be achieved.

The invention discloses a composite aluminum rim and a manufacturing method thereof. The composite aluminum rim comprises a left ring body molded by punching, a right ring body molded by die casting and a web plate; a connecting part molded by rolling is arranged in the right ring body; each of the two abutting ends of the connecting part is provided with a plurality of rectangular notches, and rectangular convex blocks adapted to the corresponding rectangular notches; a rectangular sawtooth is formed between every two adjacent rectangular notches; a rectangular groove is formed between every two adjacent rectangular convex blocks; the connecting part comprises an embedded section connected with the right ring body, and a welding section welded with the left ring body; when the right ring body and the web plate are subjected to die-casting molding, the connecting part is connected with a mould core of a die-casting molding mould in a sleeving manner, so that an adjustment gap is formed between the end of each rectangular convex block and the bottom of one corresponding rectangular notch, and an adjustment gap is formed between the end of each rectangular sawtooth and the bottom of one corresponding rectangular groove; and reinforced connecting blocks are formed in the adjustment gaps. With the adoption of the scheme, the intensity of the composite aluminum rim can be guaranteed, the production efficiency can be improved and thus the manufacturing cost is reduced, the quality grade of the composite aluminum rim can be raised effectively, and the composite aluminum rim meets the requirements of a high-quality vehicle.

A technology for binding the netted appliance for culturing fish in deep sea includes such steps as cutting the netted fabric to needed shapes and sizes, sewing and binding with ropes, and features its additional edge-binding step. Its advantages include high strength, uniform stress, and not deforming or not being damaged by waves easily.