80 terms related to injection molding

The 80 terms related to injection molding are listed below.
Dry
A method of forming reinforced products from prepreg or premixed materials.
2. One-step mixing method
When mixing, each component is added and mixed at once.
3. Dry Winding
A method of forming reinforced plastic products by winding prepreg (or tape) around a mandrel.
4. Inner lining
In order to meet the required usage properties (such as corrosion resistance, ablation resistance, leakage resistance, etc.), the inner wall of the product is lined with an inner surface layer with corresponding properties.
5. Layer Curing
A method of forming and curing thick-walled products in layers, and fully curing the last one.
6. Hand lay-up
A method for making reinforced plastic products. In this method, the reinforcing material is placed by hand on a mold coated with a release agent while applying resin until the desired thickness is reached. The article is then obtained by curing and demolding.
7. Allowable deflection angle
The angle between the non-geodesic and geodesic lines during filament winding, at which no slippage occurs.
8. Long fiber pellets
As the continuous fiber bundle passes through the corner head of the extruder, the molten resin solution is evenly coated, then cooled and cut into pellets of a certain length by the pelletizer.
9. Sheet molding compound
A sheet mixture made from a resin slurry impregnated with fibers or mats.
10. Timing of pressurization
The optimum time to apply pressure to a mold after molding.
11. Semi-dry winding
Continuous fiber yarns (or tapes or tapes) impregnated with resin glue, then pre-baked and wound on a mandrel to form a reinforced plastic product.
12. Soluble Resin Content
The content of the soluble portion of the resin in a prepreg or premix. It is expressed as a percentage of the weight of the soluble resin in the sample to the weight of the original resin in the sample.
13. Fiber Volume Content
The volume of fibers in a fiber-reinforced plastic. It is expressed as a percentage of the volume of fibers in the sample and 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 bonding ability of the fiber to the resin.
15. filament winding
A method of winding continuous resin-impregnated strands onto a mandrel or mold under controlled tension and a predetermined wire pattern to form a reinforced plastic product.
16. Cross-linking
The process of forming complex covalent or ionic bonds between polymer molecular chains.
17. Post-curing
A heat treatment that fully cures molded products of thermoset materials.
18. Compression Molding
Molding into a closed cavity that assists with pressure and generally requires heat to form a plastic product.
19. Forming Compound
A dough mixture with fillers, initiators and similar combinations of unsaturated polyesters and chopped fibers in a kneader.
20. Activation period
The period of time during which a thermoset molding compound is best suited for use after being left for a period of time, depending on the process requirements.
21. Cold Curing
The process of curing a thermosetting material at room temperature.
22. Laminated Molding
With or without a binder. A method of combining two or more layers of identical or dissimilar materials into a single unit under heat and pressure.
23. Longitudinal winding
A method of winding fiber yarns impregnated with resin glue continuously along the mandrel in the direction of the tangent of the rod holes at each end of the mandrel. There are spiral winding and flat winding.
24. Continuous forming
Processes such as soaking and curing are carried out continuously on the same device to manufacture reinforced plastic products.
25. Two-step mixing method
When mixing, the components are first divided into groups as needed, mixed separately, and then mixed together.
26. Curing
The process of cross-linking thermosetting resins or plastics by the action of superheat, light, radiation, or chemical additives.
27. Circumferential winding
A method of continuously winding a fiber yarn or belt impregnated with resin glue around a mandrel in a direction at an angle of approximately 90 degrees to the mandrel.
28. Linear winding
The speed of motion of the guide yarn in the mandrel direction is spirally wound in a linear relationship to the rotational speed of the mandrel.
29. Unidirectional Prepreg Tape
Multiple continuous fiber bundles arranged in one direction, impregnated with resin glue and dried into a tape prepared according to a certain procedure.
30. Non-Linear Winding
The speed of motion of the guide wire in the direction of the mandrel is spirally wound in a non-linear relationship with the rotational speed of the mandrel.
31. On-site winding molding
A winding molding method in the field of using extra-large fiber-reinforced plastic products (such as houses, storage tanks, long continuous pipes, etc.).
32. Resin slurry
A viscous mixture of resin with thickeners, fillers, etc.
33. Resin content
The amount of resin in a reinforced plastic is expressed as a percentage of the weight (or volume) of resin in a sample compared to the original weight (or volume) of the sample.
34. Resin glue
A liquid mixture of thinners and/or other additives that is added to a resin.
35. Resin Injection Molding
A method in which fibers or their products are previously placed in a mold and then injected with resin glue to form a reinforced plastic product by curing.
36. Application period
The time during which the prepared adhesive or resin retains its useful properties.
37. Geodesic Coiling
The winding path of the tape on the curved surface of the mandrel that coincides with the geodesic.
38. Pultrusion molding
A molding process in which continuous fibers impregnated with a resin glue are pulled through a heated die and then further solidified by passing the resin through a heated chamber to prepare a continuous plastic profile with unidirectional high strength reinforcement.
39. Volatile Matter Content
The amount of volatiles in a prepreg or premix is expressed as a percentage of the weight of volatiles in the sample to the original weight of the sample.
40. Tape Wrap Molding
A method of forming a reinforced plastic product by soaking resin glue, drying to a certain procedure or not drying the strip material, and winding it onto a core mold according to certain lap rules.
41. Preheating
In order to improve the processing performance of molding plastics and shorten the molding cycle, etc., the molding plastics are heated before molding.
42. Preforming
The molding compound is pre-processed into a blank ready to be added to the beginning of the mold cavity. Alternatively, chopped fibers can be formed from an intermediate binder to start a felt similar to the final product.
43. Prepreg
A mixture of sheet or filament resins, reinforcing materials and fillers, etc., used for molding.
44. Premixes
Mixtures of resins, reinforcing materials, fillers, etc. that are pre-treated before the plastic is molded.
45. Impregnation
The operation of impregnating resin glue with fibers or their products.
46. Dipping
Filling the entire gap between fiber reinforcement materials with resin glue.
47. Wetting
The ability of the surface and voids of a fiber reinforced material to be filled with resin glue.
48. Soaking time
The time required for a fiber yarn or cloth (tape) to soak from the introduction of resin glue to the extraction of the resin glue during the soaking process.
49. Influent residue
The amount of sizing agent that remains on the surface of the fiber after high temperature treatment of glass fibers containing textile type infiltration. Expressed as a percentage by weight.
50. Pelletizing
The process of plasticizing, extruding and pelletizing fibers and resins by means of an extruder.
51. Deficient material
A The failure of the molding compound to completely fill the cavity during the molding process. b A product defect caused by A
52. gel coat (layer)
A surface resin layer (sometimes containing colorants) on a reinforced plastic to improve its surface properties.
53. heat treatment
A reinforcing material containing a woven sizing agent that is treated at an appropriate temperature for a period of time to remove the sizing agent.
54. Flowability
The property of a molding compound resulting from compression and softening by heat.
55. Demold
The process of removing the molded part from the mold cavity.
56. Demolding
The maximum temperature at which a molded part can be removed from the mold without significant deformation.
57. Adhesive mode
During molding, the surface of the product is bonded to the mold and defects in the product are caused by the product.
58. Bag Molding
It is one of the molding methods for reinforced plastics, in which uniform pressure is applied through a flexible bag to compact the material placed on a rigid mold.
59. Lay-up angle
In reinforced plastics, the angle between the direction of placement of the fiber or fabric and the reference axis.
60. Laydown Deformation
The deformation of a fiber product as it is applied to a mold.
61. Wet molding
A method of forming reinforced plastic products by impregnating resin with fibers or their products directly.
62. Wet Winding
A method of forming reinforced plastic products directly on a mandrel after the fiber yarn (or gauze) has been impregnated with resin glue.
63. Slip wire
During filament winding, the fibers wound on the mandrel slide or slip from the drop point position to a stable position.
64. Rich resin layer
In reinforced plastic products, a layer with a high resin content that provides corrosion resistance and impermeability.
65. Injection molding
(1) A method of forming reinforced plastic products by simultaneously placing prepolymer, catalyst, and chopped fibers in a mold or mandrel.
(2) In the foaming process, such as epoxy resin, polyurethane type, a fast reacting resin, a catalytic system is sprayed onto a surface where it is foamed and cured.
66. Molding temperature
The optimum temperature of a mold when the molding compound is filled into the mold.
67. Short fiber particles
A granulated molding compound in which the resin and a certain length of fiber are granulated.
68. Winding Angle
The angle between the fiber yarn or tape wound on the mandrel and the radial or bus line of the core mold.
69. winding tension
The tension applied to the fiber yarn or tape during the winding process.
70. Winding Method
Describes the pattern of uniform arrangement of the tape on the surface of the mandrel and the relationship between the mandrel and the wire guide.
71. Type of winding
After the winding set is formed, the ribbons are evenly aligned on the mandrel surface, forming a regular pattern with repeating patterns.
72. Winding Speed Ratio
The ratio of the number of revolutions of the mandrel to the number of return trips of the wire guide per unit time.
73. Winding Speed
The length of the tape that passes through the guide wire per unit time during the winding process.
74. Winding Center Angle
The angle of rotation of the mandrel of a container during winding as the fiber is wound from one point to another. The winding center angle on the simplified section is called the advance angle. The winding center angle on the head section is called the winding angle.
75. Thickening
The concentration of the resin system in the forming compound is increased to meet the requirements of the molding. Accelerated thickening and natural thickening.
76. Thixotropy
Liquid resins to which thixotropic agents are added do not flow easily at rest, flow easily when subjected to external forces, and transform into a phenomenon that does not flow easily when external forces are removed.
77. Overflow gap
The gap between the negative mold and the positive mold that allows excess material to spill out.
78. Molding pressure
The pressure required to force the molding compound to completely fill the cavity or compact the item.
79. Molding Time
(1) When molding thermoset plastics, it is the time elapsed from the moment the mold is completely closed to the moment the pressure is released. Sometimes it also refers to the time required for the curing of thermosets or the plasticizing of thermoplastics.
(2) In injection molding, the time during which molten material is injected into the mold until pressure is maintained.
80. Molding Temperature
The temperature at which a thermoplastic is plasticized or a thermoset plastic is cured during the molding process.