Glossary of plastic molding process

1. One-step mixing method When mixing, the components are added at once and mixed.
2. Dry type The method of forming reinforced product with prepreg or premix.
3. Dry winding A method of forming a reinforced plastic product by winding a prepreg tape (or cloth tape) onto a mandrel.
4. Liner In order to meet the performance required for use (such as corrosion resistance, ablation resistance, anti-leakage, etc.), an inner surface layer with corresponding properties is lining the inner wall of the product.
5. Laminate curing A thick-walled product is graded and cured, and the final cure is complete.
6. Hand lay-up A method of making reinforced plastic products. The method is to apply the reinforcing material on the mould coated with a mold release agent while applying the resin to the desired thickness. The article is then obtained by curing and demoulding.
7. Allowed Deviation Angle The angle between non-geodes and geodesic lines where slippage does not occur during filament winding.
8. Long-fiber pellets When the continuous fiber bundle passes through the angle head of the extruder, the melted resin solution is evenly coated and then cooled, and then the granulator cuts a granular material having a certain length.
9. Sheet molding compound A sheet mixture made of a resin paste impregnated with fibers or mats.
10. Pressurization Timing When molding, the optimum time to start applying pressure to the mold after mold clamping.
11. Semi-dry winding Continuous fiber yarn (or yarn, cloth) impregnated with resin glue, then pre-baked and then wound to the core mold to form reinforced plastic products.
12. Soluble resin content The content of prepreg or premix in the soluble part of the resin. The weight of the soluble resin in the sample is expressed as a percentage of the weight of the original resin in the sample.
13. Fiber Volume Content Fiber volume content in fiber reinforced plastics. The volume of fiber in the sample is expressed as a percentage of the volume of the sample.
14. Fiber Surface Treatment The process of improving the physical or chemical properties of the fiber surface to improve the binding of the fiber to the resin.
15. Filament Winding Forming A method of forming a reinforced plastic product by winding a continuous strand impregnated with a resin glue solution onto a mandrel or a mold under conditions of controlled tension and a predetermined linear shape.
16. Cross-linking The formation of complex covalent or ionic bonds between polymer chains.
17. Post-cure A heat treatment performed to completely cure a thermosetting molded article.
18. Compression molding Compression molding moulding
In a closed mold cavity, heating is generally used to form a plastic product by means of pressure.
19. Lump-shaped molding compound A mixture of unsaturated polyester and chopped fibers combined with a filler, an initiator and the like are kneaded in a kneader.
20 Enabling period The optimal time for the thermosetting molding compound to be used after being left for a certain period of time according to the process requirements.
21. Cold curing The process of curing thermosetting materials at room temperature.
22. Laminate with or without a binder. Two or more layers of the same or different materials are integrated as a whole under heating and pressure conditions.
23. Longitudinal winding A fiber yarn impregnated with a resin glue is continuously wound onto a mandrel in a direction tangential to the pole holes at both ends of the mandrel. Divided into spiral winding and plane winding.
24. Continuous molding In the same unit, the processes of dipping, curing and other processes are continuously manufactured to manufacture reinforced plastic products.
25. Two-Step Mixing Method When mixing, first divide the components into several groups as needed, mix them well, and mix them together.
26. Curing The process of cross-linking thermosetting resins or plastics by the action of heat, light, radiation or chemical additives.
27. Loop wrapping A method in which a fiber yarn or tape impregnated with a resin glue is continuously wound onto a mandrel at an angle of approximately 90 degrees with the axis of the mandrel.
28. Linear winding Spiral winding with a linear relationship between the speed of the guide wire along the axis of the mandrel and the rotation speed of the mandrel.
29. Unidirectional prepreg tapes Several bundles of continuous fibers are unidirectionally arranged, impregnated with a resin glue solution and dried to a band made by a certain procedure.
30. Non-linear winding Spiral winding with non-linear relationship between the speed of the guide wire along the axis of the mandrel and the rotation speed of the mandrel.
31. In-situ winding molding A method of winding and molding a large-sized fiber-reinforced plastic product (such as a house, a storage tank, a continuous long pipe, etc.) at the site of use.
32. Resin paste Add thickeners, fillers and other viscous components to the resin.
33. Resin content The resin content in the reinforced plastic is expressed as a percentage of the weight (or volume) of the resin in the sample to the original weight (or volume) of the sample.
34. Resin glue Liquid resin mixture of diluent and/or other additives.
35. Resin Injection Molding A method in which fibers or their products are placed in a mold in advance, and a resin glue is injected to cure the molded plastic products.
36. The pot life of a prepared binder or resin to maintain its performance.
37. The geodesic winding is wound on the surface of the mandrel, and the entanglement of the yarn winding path coincides with the geodesic line.
38. Pultrusion molding The continuous fibers impregnated with the resin glue are pulled out through the heating die, and then the resin is further cured by passing through the heating chamber to form a unidirectional high-strength continuously reinforced plastic profile.
39 Volatile Content The content of volatile matter in the prepreg or premix, expressed as a percentage of the weight of the volatile matter in the sample and the original weight of the sample.