30 results about "Plastic stent" patented technology

The invention relates to a bracket which is intended for use in orthodontics and which is made entirely from plastic using an injection molding process. The inventive bracket comprises the basic elements of any bracket, such as the base which is fixed or cemented to the tooth, the arch groove in the mesial-distal direction and flanges for standard wire ligatures or elastomers. The invention is essentially characterised in that, as with metal brackets, the fixing base provides mechanical retention and, as such, does not have to be coated with any type of chemical additive during the cementing procedure.

The invention discloses a cooling unit for a plastic support mold. The cooling unit comprises an upper mold and a lower mold, cavities are formed in the two sides of the interior of the upper mold and the two sides of the interior of the lower mold, first fans and condensation pipes are fixedly installed in the cavities, a plurality of heat dissipation holes are formed in the sides, close to each other, of the upper mold and the lower mold, and second fans capable of moving in the axial direction are arranged on one sides of the upper mold and the lower mold. According to the cooling unit for the plastic support mold, by arranging the cavities, a first motor, first fan blades, the condensation pipes, a cooling pump, a vertical plate, an electric telescopic rod, a connecting rod, a base, a second motor and second fan blades, rapid cooling and heat dissipation of the upper mold and the lower mold can be completed, and the production efficiency and quality of products are improved.

The invention discloses a movable static contact structure for a plastic-shell circuit breaker. The back parts of a static contact plastic piece and a static contact are connected with a plastic bracket through a static contact rotating shaft; the plastic bracket is fixedly connected with a connecting bar; a spring is arranged between the back part of the static contact and the plastic bracket; acopper braided wire is connected between the connecting bar and the static contact; the back part of the static contact plastic piece is provided with two fan-shaped bosses which have fan-shaped sections and are bilaterally symmetric to the static contact; first through holes formed in the middles of the two fan-shaped bosses are coaxial with a third through hole formed on the back part of the static contact; the static contact rotating shaft passes through the first through holes and the third through hole, and the two ends of the static contact rotating shaft are connected with the plastic bracket; a first cavity is formed at the middle position of the plastic bracket; the back part of the plastic bracket is provided with a second cavity; the copper braided wire is arranged in the firstcavity; and the spring and the back parts of the static contact plastic piece and the static contact are accommodated in the second cavity. In the breaking process of a circuit breaker, electric arcsare prevented from burning the contact and metal particles produced by an arc chute are prevented from sputtering towards the back part of the static contact, so that the static contact structure is more reliable.

The invention discloses a repairing method of a plastic support. The repairing method comprises the following steps that (1) shaping treatment is performed on a treatment area of a support main body; and (2) the support main body and a mold for repairing are fixed together, plastic is melted and then injected into a mold cavity, molding is performed after cooling, and demolding is performed. If the plastic support with an inserting head damaged is repaired, the method further comprises the step of detaching the damaged inserting head from the plastic support before the step (1) and the step of shaping an inserting piece of the deformed inserting head before the step (2). According to the repairing method of the plastic support, the firmness degree of the plastic support can be improved, the service life of the repaired plastic support is prolonged, and the damaged plastic support is recycled through repairing.

The invention relates to an anti-reflux biliary stent, which is provided with a stent body and side wings. The biliary stent is also provided with an anti-reflux valve; tube and a bag with a release slit, the fixing ring cooperates with the annular groove at the tail end of the stent body so that the anti-reflux valve is fixed on the stent body; the cross section of the groove is arc-shaped, and its central angle 180-240 degrees; the release gap is "Y" or "ten". The biliary tract stent of the present invention is equipped with an anti-reflux valve, and the anti-reflux valve is provided with a spherical pouch with a release slit, which can reduce the occurrence of biliary enteric reflux and biliary tract infection, and may prolong the patency of the plastic biliary stent. In the long term, the quality of life of patients is greatly improved, and the anti-reflux valve is firmly combined with the stent body, and it is not easy to loosen. The whole biliary stent has a simple structure and is easy to use, which is suitable for clinical promotion.

The invention relates to the technical field of pin header connectors, in particular to a modular splicing type pin header which comprises a plastic support and at least one pin header terminal installed in the plastic support, the plastic support comprises a plurality of mutually spliced installation blocks, the pin header terminal is detachably inserted into the installation blocks, splicing assemblies are arranged on the installation blocks, and the splicing assemblies are connected with the pin header terminal. And the mounting blocks are connected with one another through splicing assemblies. According to the plastic support, the mounting blocks are arranged, the splicing assemblies are arranged on the mounting blocks, the mounting blocks can be spliced through the splicing assemblies to form the plastic support, and the pin header terminals are inserted into the mounting blocks, so that the spliced plastic support can form specific pin headers, a user can splice pin header styles conveniently according to actual requirements, the production cost can be reduced, and the production efficiency is improved. The application range is wide.

The invention relates to household appliances, in particular to a kettle body structure. A kettle body comprises a liner, a shell, a handle and a base. An opening is formed in one side of the shell. The liner is sleeved with the shell. The shell is a metal shell. The kettle body further comprises a plastic support arranged between the metal shell and the liner. The plastic support is used for supporting the metal shell and comprises a first support. The first support is axially arranged at the opening along the outer wall of the liner. The handle covers the opening. The kettle body structure is low in cost and convenient to assemble and is more conveniently and more safely used.

The invention discloses a precision waterproof part with an ultra-thin circuit board and a mold and process for forming the part. The mold for forming the precision waterproof part with an ultra-thin circuit board includes an air chamber bottom cover, a core board, a middle board, The upper template and the binder plate; the surface of the core board is convexly provided with at least one core, and the upper end surface of the core is concavely provided with a positioning cavity and an annular groove; the precision waterproof part with an ultra-thin circuit board includes an FPC circuit board , plastic support and silica gel layer; by utilizing the mold structure of the present invention and cooperating with the molding process of the present invention, the silica gel layer is formed, and the silica gel layer is used to connect between the FPC circuit board and the plastic support, and the plastic support can be directly installed with the outside, In this way, the FPC circuit board and the external installation can be realized, which brings convenience to the use. With the specific formula of the silica gel layer in the present invention, the silica gel layer can be firmly combined with the FPC circuit board and the plastic bracket, and the insulation, stability, temperature and weather resistance Good, anti-aging, low surface tension, good product performance.