80 injection molding related terms

Dry type

A method of forming a reinforcing article from a prepreg or premix.

2. One-step mixing method

When mixing, the components are added and mixed at once.

3. Dry winding

A method of forming a reinforced plastic article by winding a prepreg tape (or tape) onto a mandrel.

4. Inner liner

In order to meet the required properties of use (such as corrosion resistance, ablation resistance, leakage resistance, etc.), the inner wall of the product is lined with an inner surface layer having corresponding properties.

5. Layered curing

A method of forming and curing a thick-walled product in a divided manner and performing a complete curing for the last time.

6. Hand lay-up

A method of making a reinforced plastic article. In the method, on the mold coated with the release agent, the reinforcing material is placed by hand while the resin is applied until the desired thickness. The article is then obtained by curing and demolding.

7. Allowed off-angle

During the filament winding process, the angle between the non-geodetic line and the geodesic line where slippage does not occur.

8. Long fiber pellets

When the continuous fiber bundle passes through the angle head of the extruder, the molten resin liquid is evenly coated, and then cooled, and cut into a pellet of a certain length by a pelletizer.

9. Sheet molding compound

A sheet-like mixture made of a resin paste impregnated with fibers or mats.

10. Pressurization timing

The optimum time to apply pressure to the mold after molding after molding.

11. Semi-dry winding

A continuous fiber yarn (or a tape, a tape) is impregnated with a resin glue, and then pre-baked and then wound onto a mandrel to form a reinforced plastic article.

12. Soluble resin content

The content of the prepreg or premix in the resin soluble portion. It is expressed as a percentage of the weight of the soluble resin in the sample and the weight of the original resin in the sample.

13. Fiber volume content

The volume of fiber in fiber reinforced plastics. It is expressed as a percentage of the volume of the fibers in the sample and the volume of the sample.

14. Fiber surface treatment

A process for 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 forming a reinforced plastic article by winding a continuous strand of resin impregnated onto a mandrel or mold under controlled tension and a predetermined line shape.

16. Cross-linking

The process of forming complex covalent or ionic bonds between polymer molecular chains.

17. Post curing

Heat treatment for the complete curing of the thermosetting material molded article.

18. Compression molding

Molded into a closed cavity, assisting pressure, and generally requires heating to form a plastic article.

19. Group molding compound

A dough mixture in which a combination of a filler, an initiator, and the like of an unsaturated polyester and a chopped fiber is kneaded in a kneader is added.

20. Activation period

The most suitable time for the thermosetting molding compound to be used after being placed for a certain period of time according to the process requirements.

21. Cold curing

The process of curing a thermosetting material at normal temperature.

22. Lamination molding

With or without a binder. A method of combining two or more layers of the same or different materials as a whole under heat and pressure.

23. Longitudinal winding

A method of continuously winding a fiber yarn impregnated with a resin glue onto a mandrel in a direction tangential to a pole hole at both ends of the mandrel. Divided into spiral winding and flat winding.

24. Continuous molding

On the same unit, a process of immersing, solidifying, and the like is continuously performed to manufacture a reinforced plastic product.

25. Two-step mixing method

When mixing, first divide the components into several groups as needed, mix them separately, and then mix them together.

26. Curing

The process of crosslinking a thermosetting resin or plastic by the action of overheating, light, radiation or chemical additives.

27. Circumferential winding

A method in which a fiber yarn or a belt impregnated with a resin glue is continuously wound onto a mandrel in a direction at an angle of approximately 90 degrees to the axis of the mandrel.

28. Linear winding

The speed of movement of the guide wire in the direction of the axis of the mandrel is helically wound in a linear relationship with the rotational speed of the mandrel.

29. Unidirectional prepreg tape

A plurality of bundles of continuous fibers are unidirectionally arranged, impregnated with a resin glue and dried to a tape prepared by a certain procedure.

30. Nonlinear winding

The speed of movement of the guide wire in the direction of the axis of the mandrel is helically wound in a nonlinear relationship with the rotational speed of the mandrel.

31. On-site winding forming

A method of winding forming in the field of use of extra large fiber reinforced plastic products (such as houses, storage tanks, continuous long tubes, etc.).

32. Resin paste

A viscous mixture of thickeners, fillers and the like is added to the resin.

33. Resin content

The amount of resin 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

A liquid mixture of diluent and/or other additives is added to the resin.

35. Resin injection molding

A method in which a fiber or a product thereof is previously placed in a mold, and a resin glue is injected to form a reinforced plastic article by curing.

36. Applicable period

The time during which the prepared binder or resin retains its useful properties.

37. Geodesic winding

On the curved surface of the mandrel, the winding path of the tape is coincident with the geodesic.

38. Pultrusion molding

The continuous fiber impregnated with the resin glue is drawn through a heating mold, and then the resin is further solidified by a heating chamber to prepare a molding process having a unidirectional high strength continuous reinforced plastic profile.

39. Volatile content

The amount of volatiles in the prepreg or premix is ​​expressed as a percentage of the weight of the volatiles in the sample to the original weight of the sample.

40. Belt winding molding

A method of forming a reinforced plastic product by dipping the resin glue, drying it to a certain program or without drying the strip material, and winding it onto the core mold according to a certain lap rule.

41. Preheating

In order to improve the processing properties of the molding compound and shorten the molding cycle, etc., the molding compound is heated prior to molding.

42. Preform

The molding compound is pre-machined into a billet that is ready to be added to the beginning of the mold cavity. Alternatively, the chopped fibers can be formed from an intermediate binder to begin with a felt similar to the final product.

43. Prepreg

A sheet-like or filament-like resin for molding, a mixture of a reinforcing material and a filler, and the like.

44. Premix

A mixture of resin, reinforcing material, filler, etc., which is pre-processed before plastic molding.

45. Dipping

The operation of impregnating a resin glue with a fiber or its product.

46. ​​Soaking

The entire gap between the fiber-reinforced materials is filled with the resin glue.

47. Wetting

The ability of the surface and voids of the fiber reinforcement to be filled with resin glue.

48. Immersion time

The time it takes for the fiber yarn or cloth (belt) to pass from the introduction of the resin glue to the extraction of the resin glue during dipping.

49. Influent residue

The amount of sizing agent remains on the surface of the fiber after high temperature treatment of the glass fiber containing the textile type infiltrated. Expressed in weight percent.

50. Granulation

The process of plasticizing, extruding, and pelletizing fibers and resins by an extruder.

51. lack of material

A In the molding process, the molding compound cannot completely fill the cavity. B Product defects caused by A.

52. Gel coat (layer)

A surface resin layer (sometimes containing a colorant) on a reinforced plastic to improve its surface properties.

53. Heat treatment

The reinforcing material containing the woven sizing agent is treated at a suitable temperature for a certain period of time to remove the sizing agent.

54. Liquidity

The performance of the molding compound due to compression and softening by heat.

55. Demoulding

The process of removing the molded part from the cavity.

56. Demoulding

The highest temperature at which the molded article does not undergo significant deformation upon demolding.

57. Sticky mode

In the molding, the surface of the product and the mold are bonded and the defects of the product are caused by the product.

58. Bag forming

It is one of the methods of forming a reinforced plastic by applying a uniform pressure through a flexible bag to compact the material placed on the rigid mold.

59. Laying angle

In reinforced plastics, the angle between the placement direction of fibers or fabrics and the reference axis.

60. Spreading deformation

The deformation of the fibrous product when it is applied on the mold.

61. Wet forming

A method of directly forming a reinforced plastic article after impregnating the resin with a fiber or a product thereof.

62. Wet winding

After the fiber yarn (or gauze) is impregnated with the resin glue, the method of forming the reinforced plastic product directly onto the mandrel is formed.

63. Slide line

In the process of filament winding, the fiber wound onto the mandrel slides from the position of the doffing point to a stable position or slippage.

64. Rich resin layer

In a reinforced plastic product, a layer having a higher resin content capable of functioning as a corrosion resistance and an anti-seepage.

65. Injection molding

(1) A method of simultaneously forming a prepolymer, a catalyst and chopped fibers onto a mold or a mandrel to form a reinforced plastic article.

(2) In a foam process, such as epoxy, 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 the mold when the molding compound is filled into the mold.

67. Short fiber pellets

A granular molding compound in which a 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 core mold meridian or bus bar.

69. Winding tension

The tension applied to the fiber yarn or belt during the winding process.

70. Winding law

Describe the rule that the tape is evenly arranged on the surface of the mandrel and the relationship between the mandrel and the wire guide.

71. Winding type

When the winding is formed, the yarn ribbon is evenly arranged on the surface of the mandrel in a regular pattern and the pattern is repeated.

72. Winding speed ratio

The ratio of the number of revolutions of the core mold to the number of times the guide wire is returned per unit time.

73. Winding speed

The length of the tape passing through the guide wire per unit time during the winding process.

74. Winding center angle

The angle at which the mandrel is rotated when the fiber is wound from one point to another when the container is wound. The center angle of the winding on the simplified segment is called the advance angle. The center angle of the winding on the head section is called the wrap angle.

75. Thickening

The consistency of the resin system in the molding compound is increased to meet the molding molding requirements. Accelerated thickening and natural thickening.

76. Thixotropy

The liquid resin to which the thixotropic agent is added does not easily flow when it is at rest, and when it is subjected to an external force, it is easy to flow, and after the external force is removed, it is converted into a phenomenon that it is not easy to flow.

77. Overflow gap

The gap between the negative and the male molds that can cause excess material to overflow.

78. Molding pressure

The molding compound is forced to completely fill the cavity or the pressure necessary to compact the article.

79. Molding time

(1) When thermosetting plastic molding, it refers to the time elapsed from the moment when the mold is completely closed to the moment when the pressure is released. Sometimes it also refers to the time required for curing of thermosetting plastics or plasticizing of thermoplastics.

(2) In injection molding, the time during which the molten material is injected into the mold until the pressure is maintained.

80. Molding temperature

The temperature at which the thermoplastic is plasticized or the thermosetting plastic is cured during molding.