CN220163275U - Preforming die and forming device - Google Patents

Abstract

The utility model provides a preforming die and a forming device. The preform mold includes a first mold, a second mold, a divider, a first slug and a second slug. The first mold and the second mold are buckled to form a communicated mounting cavity and a preformed cavity. A divider divides the preform cavity into a first channel and a second channel. The first slug is disposed within the mounting cavity and has a third channel in communication with the first channel and a fourth channel in communication with the second channel. The second slug is disposed on a side of the preformed cavity proximate the inlet end and has a fifth channel in communication with the first channel and a sixth channel in communication with the second channel. In this way, the first and second inserts can prevent the fiber yarn from entering the gap between the first and second dies as the fiber yarn passes through the preform die.

Description

Preforming die and forming device

Technical Field

The utility model relates to the technical field of composite material production equipment, in particular to a preforming die and a forming device.

Background

In the production process of the fiber reinforced composite material, fiber yarns are generally soaked in glue solution, such as resin, in a glue soaking tank, and the fiber yarns soaked in the resin sequentially pass through a pre-forming die and a forming die to be cured and formed, so as to produce the fiber reinforced composite material product.

The preformed mould comprises an upper mould and a lower mould, a single cavity is formed between the upper mould and the lower mould, and fiber yarns which infiltrate resin easily enter gaps between the upper mould and the lower mould to cause difficult mould cleaning in the process of passing through the cavity, so that the production efficiency is affected.

Disclosure of Invention

To overcome the problems in the related art, the present utility model provides a preform mold and a molding apparatus.

According to a first aspect of the present utility model there is provided a preform mould having an inlet end and an outlet end, the preform mould comprising:

the device comprises a first die and a second die, wherein an installation cavity and a preformed cavity are formed between the first die and the second die in a buckling state of the first die and the second die, the installation cavity is communicated with the preformed cavity, the preformed cavity and the installation cavity are sequentially arranged along a first direction, and the first direction is a direction from an inlet end to an outlet end;

a partition member disposed in the preform cavity to partition the preform cavity into a first channel and a second channel;

a first slug disposed within the mounting cavity, the first slug having a third channel in communication with the first channel and a fourth channel in communication with the second channel;

the second insert is arranged on one side of the preformed cavity close to the inlet end and is provided with a fifth channel communicated with the first channel and a sixth channel communicated with the second channel.

In some embodiments of the utility model, the thickness of the separator increases gradually in the first direction.

In some embodiments of the present utility model, the cross sections of the fifth channel, the first channel and the third channel are rectangular, and the cross sectional areas of the fifth channel, the first channel and the third channel are sequentially reduced along the first direction;

the sections of the sixth channel, the second channel and the fourth channel are rectangular, and the sectional areas of the sixth channel, the second channel and the fourth channel are sequentially reduced along the first direction;

wherein the cross section is a plane perpendicular to the first direction.

In some embodiments of the present utility model, the fifth channel, the first channel and the third channel are connected by a smooth curved transition;

the sixth channel, the second channel and the fourth channel are in transitional connection through smooth curved surfaces.

In some embodiments of the utility model, the preform mold further comprises at least one preform plate coupled to the first mold and the second mold, the preform plate being located on a side of the first slug remote from the second slug.

In some embodiments of the utility model, the preformed plate is provided with a through hole, the through hole comprises a reducing section and a straight hole section, the reducing section is arranged close to the first insert, the cross-sectional area of the reducing section is gradually reduced along the first direction, and the cross section is a plane perpendicular to the first direction;

the straight hole section is positioned on one side of the reducing section away from the first insert.

In some embodiments of the utility model, the preformed plate is provided with two through holes, which correspond to the third channel and the fourth channel, respectively.

In some embodiments of the utility model, the preform mold further comprises a third slug disposed on a side of the preform plate remote from the first slug, the third slug having a seventh channel having a cross-sectional area that is less than the sum of the minimum cross-sectional area of the third channel and the minimum cross-sectional area of the fourth channel,

wherein the cross section is a plane perpendicular to the first direction.

According to a second aspect of the present utility model, there is provided a forming device comprising the above-mentioned preform mould, the forming device further comprising a impregnation tank for impregnating the fibre yarn, one end of the impregnation tank being connected to a second slug of the preform mould, the other end of the impregnation tank being provided with a yarn feeding aperture plate.

In some embodiments of the utility model, the forming device further comprises a forming die connected to the third slug of the preform die, the forming die being for extrusion forming of the fiber strands passing through the preform die.

The preform mold of the present utility model includes a first mold, a second mold, a divider, a first slug and a second slug. The first mold and the second mold are buckled to form a preformed cavity and a mounting cavity which are communicated with each other. A divider is disposed within the preform cavity to divide the preform cavity into a first channel and a second channel. The first slug is arranged in the mounting cavity, the second slug is arranged on one side, close to the inlet end, of the preformed cavity, and the first slug and the second slug are arranged to prevent fiber yarns from entering gaps between the first die and the second die to cause cleaning difficulty.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a preform mold according to an exemplary embodiment of the present utility model;

FIG. 2 is a cross-sectional view of the preform mold AA of FIG. 1;

fig. 3 is a schematic structural view of a molding apparatus according to an exemplary embodiment of the present utility model.

In the figure:

1-preforming a die; 11-a first mold; 12-a second mold; 13-a mounting cavity; 14-preforming a cavity; 141-a first channel; 142-a second channel; 15-an inlet end; 16-an outlet end; 17-spacers; 18-a first slug; 181-third channel; 182-fourth channel; 19-a second slug; 191-fifth channel; 192-sixth channel; 2-preforming the plate; 21-a through hole; 211-reducing section; 212-straight bore section; 3-a third slug; 31-seventh channel; 4-a gum dipping tank; 41-a yarn feeding pore plate; 42-heating part; 5-forming a mold; 6-forming device.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present utility model based on the embodiments of the present utility model.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will illustratively and implicitly understand that the embodiments described herein may be combined with other embodiments.

In the production process of the fiber reinforced composite material, fiber yarns are generally soaked in glue solution, such as resin, in a glue soaking tank, and the fiber yarns soaked in the resin sequentially pass through a pre-forming die and a forming die to be cured and formed, so as to produce the fiber reinforced composite material product.

The prior preformed mould consists of an upper mould and a lower mould, wherein the upper mould and the lower mould are buckled, and a single cavity can be formed between the upper mould and the lower mould. In the process of passing through the cavity, the fiber yarns soaked in the resin easily enter gaps between the upper die and the lower die to cause difficult die cleaning, and the production efficiency is affected. In addition, when a certain amount of fiber yarn passes through a single cavity, the friction force of the upper surface and the lower surface of the fiber yarn is larger by the mold, and the friction force of the middle part of the fiber yarn is smaller by the mold, so that uneven thickness of a product is easily caused, and the quality of the product is affected.

Based on this, the present utility model provides a preform mold comprising a first mold, a second mold, a divider, a first slug and a second slug. The first mold and the second mold are buckled to form a preformed cavity and a mounting cavity which are communicated with each other. A divider is disposed within the preform cavity for dividing the preform cavity into a first channel and a second channel. The first abaculus is arranged in the mounting cavity, the second abaculus is arranged on one side of the preformed cavity close to the inlet end, and therefore, the first abaculus and the second abaculus can prevent fiber yarns from entering gaps between the first die and the second die to cause cleaning difficulty. The fiber yarn passing through the preform mold can pass through the fifth channel, the first channel, the third channel, and the sixth channel, the second channel, and the fourth channel, respectively. The fiber yarn parts passing through the channels are subjected to balanced friction force, so that the profile with uniform thickness is formed.

Referring to fig. 1 in combination with fig. 2, the present utility model provides a preform mold 1, the preform mold 1 having an inlet end 15 and an outlet end 16. The preform mold 1 comprises a first mold 11, a second mold 12, a spacer 17, a first slug 18 and a second slug 19. In a state where the first mold 11 and the second mold 12 are engaged, a mounting cavity 13 and a preform cavity 14 are formed between the first mold 11 and the second mold 12, and the mounting cavity 13 communicates with the preform cavity 14. The preform cavity 14 and the mounting cavity 13 are arranged in sequence in a first direction, the first direction being the direction from the inlet end 15 of the preform mold 1 to the outlet end 16. The first direction may be, for example, the x-direction in fig. 1.

The first mold 11 and the second mold 12 may be fixedly connected by clamping, bonding, welding, screwing, etc. to avoid the relative positions of the first mold 11 and the second mold 12 from moving during the preforming process. The first die 11 and the second die 12 form a preformed cavity 14 and a mounting cavity 13 which are communicated with each other and have good tightness, so that dust in air is prevented from entering the cavity to pollute fiber yarns in the preformed die 1, and the quality of products is guaranteed.

Referring to fig. 2, in the present embodiment, a partition 17 is disposed in the preform cavity 14 to partition the preform cavity 14 into a first channel 141 and a second channel 142. The first slug 18 is disposed within the mounting cavity 13, the first slug 18 having a third channel 181 in communication with the first channel 141 and a fourth channel 182 in communication with the second channel 142. The second slug 19 is disposed on the side of the pre-form cavity 14 adjacent the inlet end 15, the second slug 19 having a fifth channel 191 in communication with the first channel 141 and a sixth channel 192 in communication with the second channel 142. The fiber yarn passes through the fifth channel 191, the first channel 141, the third channel 181, and the sixth channel 192, the second channel 142, and the fourth channel 182, respectively. Thus, compared with the preforming mould 1 with a single cavity, the friction force applied to the middle part and the upper surface and the lower surface of the fiber yarn in each channel is relatively balanced, and the preforming mould is favorable for forming products with uniform thickness.

Illustratively, the fiber yarn may be, for example, a carbon fiber yarn, a glass fiber yarn, or the like, and the present embodiment is not limited.

Referring to fig. 2, in the present embodiment, the second insert 19 is disposed on a side of the pre-forming cavity 14 near the inlet end 15, so that the fiber yarn passes through the fifth channel 191 and the sixth channel 192 of the second insert 19 before entering the pre-forming cavity 14, so that the fiber yarn that infiltrates the glue solution can be prevented from entering the gap between the first mold 11 and the second mold 12. The first slug 18 is disposed in the mounting cavity 13, the mounting cavity 13 being in communication with the preform cavity 14 such that the fiber yarn passing through the preform cavity 14 passes through the third and fourth channels 181, 182, avoiding the fiber yarn passing through the preform cavity 14 from entering the gap between the first and second dies 11, 12. The first insert 18 and the second insert 19 can prevent the fiber yarn from entering the gap between the first die 11 and the second die 12, so that the difficulty in cleaning the preformed die 1 caused by clamping the fiber yarn in the gap is avoided, and the production efficiency is guaranteed.

Illustratively, the first slug 18 may be disposed within the mounting cavity 13 by welding, bonding, clamping, or the like. The second insert 19 may be connected to the first mold 11 and the second mold 12 by welding, bonding, clamping, or the like, which is not limited in this embodiment.

Referring to fig. 2, in one embodiment, the thickness of the separator 17 gradually decreases in the first direction.

In this embodiment, the first direction is the direction from the inlet end 15 to the outlet end 16 of the preform mold 1. Referring to fig. 2, the first direction may be, for example, an x-direction. The thickness of the partition 17 gradually increases from the inlet end 15 to the outlet end 16, so that the thicknesses of the first and second passages 141 and 142 gradually decrease from the inlet end 15 to the outlet end 16. Thus, the fiber yarn impregnated with the resin can extrude the redundant resin and the air in the fiber yarn through the first channel 141 and the second channel 142, so that the resin viscosity is increased while the resin dosage is controlled, and the quality of the product is improved.

In one embodiment, the cross sections of the fifth channel 191, the first channel 141 and the third channel 181 are rectangular, and the cross sectional areas of the fifth channel 191, the first channel 141 and the third channel 181 decrease sequentially along the first direction. As such, the resin-impregnated fiber yarn can be gradually extruded and preliminarily formed while passing through the fifth passage 191, the first passage 141 and the third passage 181 in sequence. Meanwhile, redundant resin in the fiber yarn can be extruded, so that the resin consumption is saved, and the utilization rate of raw materials is improved. In this embodiment, the cross section is a plane perpendicular to the first direction. Referring to fig. 2, the first direction is the direction from the inlet end 15 toward the outlet end 16. The shape of the cross section may be set according to actual needs, and illustratively, the shape of the cross section may be circular, elliptical, square, or the like, and the present embodiment is not limited.

The cross-sections of the sixth channel 192, the second channel 142 and the fourth channel 182 are rectangular, and the cross-sectional areas of the sixth channel 192, the second channel 142 and the fourth channel 182 decrease in sequence along the first direction. The process of sequentially passing the resin-impregnated fiber yarn through the sixth channel 192, the second channel 142 and the fourth channel 182 is the same as the process of sequentially passing the resin-impregnated fiber yarn through the fifth channel 191, the first channel 141 and the third channel 181, and will not be repeated here.

Referring to fig. 2, in one embodiment, the fifth channel 191, the first channel 141, and the third channel 181 are connected by a smooth curved transition.

In this embodiment, the connection surfaces of the fifth channel 191, the first channel 141 and the third channel 181 are smooth, when the fiber yarn infiltrated with the resin sequentially passes through the fifth channel 191, the first channel 141 and the third channel 181, the friction force at the connection position of the fiber yarn and the channels can be reduced, the fiber yarn is prevented from being broken or damaged due to friction, and the quality of the product is guaranteed.

The sixth channel 192, the second channel 142, and the fourth channel 182 are connected by a smooth curved transition. The connection structure between the sixth passage 192, the second passage 142 and the fourth passage 182 is the same as the connection structure between the fifth passage 191, the first passage 141 and the third passage 181, and will not be described again here.

Referring to fig. 2 and 3, in one embodiment, the preform mold 1 further comprises at least one preform sheet 2, the preform sheet 2 being connected to the first mold 11 and the second mold 12, the preform sheet 2 being located on the side of the first slug 18 remote from the second slug 19. The preform sheet 2 is positioned on the side of the first slug 18 remote from the second slug 19 such that after the resin-impregnated fiber yarns have passed through the second slug 19, the preform cavity 14, the first slug 18 in that order, the fiber yarns pass through the preform sheet 2. The preform sheet 2 can further press the fiber yarn so that the fiber yarn is preliminarily molded, which is advantageous in improving the preforming efficiency.

Illustratively, the preformed plate 2 and the first mold 11 and the second mold 12 may be fixedly connected by clamping, bonding, screw connection, welding, etc., which is not limited in this embodiment.

In this embodiment, the number of the preformed plates 2 may be set according to actual needs. The number of the preform boards 2 may be two or more, for example. Referring to fig. 3, the number of the pre-forming plates 2 is two, so that the fiber yarn sequentially passes through the two pre-forming plates 2, thereby facilitating the preliminary forming of the fiber yarn and improving the pre-forming efficiency.

Referring to fig. 2, in one embodiment, the preformed plate 2 is provided with a through hole 21, the through hole 21 comprising a reducing section 211 and a straight hole section 212, the reducing section 211 being provided adjacent to the first slug 18, the reducing section 211 having a cross-sectional area gradually decreasing in a first direction, for example the x-direction. The straight bore section 212 is located on the side of the reduced diameter section 211 remote from the first slug 18.

In this embodiment, the through holes 21 provided on the preformed plate 2 can further squeeze the fiber yarn to squeeze out the excessive resin in the fiber yarn, which is beneficial to saving raw materials and improving the performance of the product. The through hole 21 includes a variable diameter section 211 and a straight hole section 212. The variable diameter section 211 is disposed adjacent to the first slug 18. The fiber yarn passing through the third passage 181 and the fourth passage 182 passes through the reducing section 211, and the sectional area of the reducing section 211 is gradually reduced, so that the pressing force applied to the fiber yarn passing through the reducing section 211 is gradually increased. In this way, the reducing section 211 with gradually reduced cross-sectional area is provided, so that the redundant resin in the fiber yarn can be extruded, and the raw material can be saved. The straight hole section 212 is provided on the side of the variable diameter section 211 remote from the first slug 18, the cross-sectional area of the straight hole section 212 being unchanged. As the resin-impregnated fiber yarns pass through the straight bore section 212, they are subjected to a constant compressive force, which facilitates their preliminary shaping.

Illustratively, the shape of the through-holes 21 on the preform sheet 2 is set according to actual needs. The shape of the through hole 21 may be, for example, elliptical, circular, square, trapezoid, etc., and the present embodiment is not limited thereto. In this embodiment, the shape of the through hole 21 is a rounded rectangle, and the reducing section 211 of the through hole 21 and the straight hole section 212 are connected by a smooth curved surface in a transitional manner. In this way, the fiber yarn which is infiltrated with the resin can be prevented from being damaged or broken due to the sharp part of the through hole 21 in the process of penetrating the through hole 21, and the quality of products is guaranteed.

In one embodiment, the pre-forming plate 2 is provided with two through holes 21, and the two through holes 21 respectively correspond to the third channel 181 and the fourth channel 182.

Referring to fig. 2, in the present embodiment, the number of through holes 21 corresponds to the number of channels provided in the first slug 18. In this way, the fiber yarn passing through the third passage 181 and the fourth passage 182 can enter the corresponding through hole 21 on the preform sheet 2, which is advantageous for improving the preform efficiency.

Referring to fig. 2, in an embodiment, the preform mold 1 further comprises a third slug 3, the third slug 3 being disposed on a side of the preform plate 2 remote from the first slug 18, the third slug 3 having a seventh channel 31, the seventh channel 31 having a cross-sectional area smaller than the sum of the smallest cross-sectional area of the third channel 181 and the smallest cross-sectional area of the fourth channel 182.

In this embodiment, the third slug 3 is connected to the first and second dies 11, 12. The third slug 3 has a seventh channel 31 provided in the side of the preformed plate 2 remote from the first slug 18. After the fiber yarn is preliminarily formed through the pre-forming plate 2, the fiber yarn enters a seventh channel 31, and the seventh channel 31 can shape the preliminarily formed fiber yarn to adapt the shape of the fiber yarn to the shape of a desired product.

Illustratively, the pre-forming plate 2 is provided with two through holes 21, and two fiber yarns passing through the two through holes 21 simultaneously enter the seventh channel 31, and the seventh channel 31 presses the two fiber yarns into a whole, so that the pressed fiber yarns adapt to the shape of a required product, and the quality of the product is improved. In the present embodiment, the cross-sectional shape of the seventh channel 31 may be square, oval, round, rounded rectangle, etc., and the present embodiment is not limited thereto.

Referring to fig. 3, an exemplary embodiment of the present utility model provides a molding apparatus 6, the molding apparatus 6 including the above-described preforming die 1, and the molding apparatus 6 further including the dipping tank 4. The dipping tank 4 is used for dipping fiber yarns, one end of the dipping tank 4 is connected with the second embedded block 19 of the preforming die 1, and the other end of the dipping tank 4 is provided with a yarn feeding hole plate 41.

In this embodiment, one end of the impregnation tank 4 is connected to the second slug 19 of the preform mold 1, and the other end of the impregnation tank 4 is provided with a yarn feeding hole plate 41. The fiber yarn to be impregnated passes through the yarn feeding hole plate 41, and the fiber yarn passing through the yarn feeding hole plate 41 is dispersed and enters the impregnation tank 4 to infiltrate the glue solution, and the glue solution can be resin, for example. The resin-impregnated fiber yarn enters the preform mold 1 through the fifth and sixth channels 191 and 192 of the second slug 19 until preliminary extrusion. Thus, the mechanical property of the fiber yarn can be improved, and the preforming efficiency and the product quality are improved.

Illustratively, the size of the impregnation tank 4 may be determined according to the amount of the fiber yarn and the resin. The shape of the dipping tank 4 is set according to actual needs, and the shape of the dipping tank 4 may be, for example, a cuboid, a cylinder, a hexagonal prism, etc., which is not limited in this embodiment.

The yarn feeding hole plate 41 and the dipping tank 4 may be fixedly connected by welding, clamping, bonding, screw connection, etc., and the yarn feeding hole plate 41 and the dipping tank 4 may be integrally formed, which is not limited in this embodiment.

Referring to fig. 3, in one embodiment, a heating portion 42 is disposed on a side of the heating orifice plate away from the impregnation tank 4, and the heating portion 42 is used to heat the fiber yarn before passing through the yarn feeding orifice plate 41.

In this embodiment, the fiber yarn has better surface property after passing through the heating part 42, the fiber yarn enters the dipping tank 4 through the yarn feeding pore plate 41 after being heated, and the surface of the fiber yarn can be fully infiltrated with resin, so that the infiltration effect is improved, and the product quality is further improved.

Referring to fig. 3, in an embodiment, the forming device 6 further comprises a forming die 5, the forming die 5 being connected to the third slug 3 of the preform die 1, the forming die 5 being adapted to extrude the fiber yarn passing through the preform die 1.

In this embodiment, the seventh channel 31 of the third insert 3 is capable of shaping the fiber yarn impregnated with the resin, and the shaped fiber yarn enters the shaping mold 5 to be extruded and shaped, thereby obtaining a shaped product.

In one embodiment, the forming die 5 includes a release cloth roll (not shown). Illustratively, two release cloth rolls are provided, an upper release cloth roll and a lower release cloth roll, respectively. The upper demolding cloth roller is used for supporting and flattening the upper demolding cloth, and the lower demolding cloth roller is used for supporting and flattening the lower demolding cloth. The upper demolding cloth and the lower demolding cloth are respectively covered on the upper surface and the lower surface of the shaped fiber yarn, and enter the forming die 5 together with the fiber yarn for forming. Therefore, resin on the surface of the fiber yarn is prevented from polluting the forming die, the demolding of a formed product is facilitated, and the surface smoothness of the product can be improved.

The embodiments described in the present specification are merely examples of implementation forms of the inventive concept, and the scope of protection of the present utility model should not be construed as being limited to the specific forms set forth in the embodiments, but the scope of protection of the present utility model also includes equivalent technical means that can be conceived by those skilled in the art according to the inventive concept.

Claims (10)

1. A preform mold, wherein the preform mold has an inlet end and an outlet end, the preform mold comprising:

the device comprises a first die and a second die, wherein an installation cavity and a preformed cavity are formed between the first die and the second die in a buckling state of the first die and the second die, the installation cavity is communicated with the preformed cavity, the preformed cavity and the installation cavity are sequentially arranged along a first direction, and the first direction is the direction from the inlet end to the outlet end;

a divider disposed within the preform cavity to divide the preform cavity into a first channel and a second channel;

a first slug disposed within the mounting cavity, the first slug having a third channel in communication with the first channel and a fourth channel in communication with the second channel;

the second insert is arranged on one side of the preformed cavity, which is close to the inlet end, and is provided with a fifth channel communicated with the first channel and a sixth channel communicated with the second channel.

2. The preform mold of claim 1, wherein the thickness of the divider member increases gradually along the first direction.

3. The preform mold of claim 1, wherein the fifth channel, the first channel, and the third channel are rectangular in cross-section, and the fifth channel, the first channel, and the third channel decrease in cross-sectional area in sequence along a first direction;

the sections of the sixth channel, the second channel and the fourth channel are rectangular, and the sectional areas of the sixth channel, the second channel and the fourth channel are sequentially reduced along the first direction;

wherein the cross section is a plane perpendicular to the first direction.

4. A preform mold according to claim 3, wherein the fifth channel, the first channel and the third channel are connected by a smooth curved transition;

and the sixth channel, the second channel and the fourth channel are in transitional connection through smooth curved surfaces.

5. The preform mold of claim 1 further comprising at least one preform plate connected to the first mold and the second mold, the preform plate being located on a side of the first slug remote from the second slug.

6. The preform mold of claim 5, wherein the preform plate is provided with a through hole, the through hole comprising a reducing section and a straight hole section, the reducing section being provided adjacent to the first slug, the reducing section having a cross-sectional area that gradually decreases along the first direction, the cross-section being a plane perpendicular to the first direction;

the straight hole section is positioned on one side of the reducing section away from the first insert.

7. The preform mold according to claim 6, wherein the preform plate is provided with two through holes corresponding to the third passage and the fourth passage, respectively.

8. The preform mold of claim 5, further comprising a third slug disposed on a side of the preform plate remote from the first slug, the third slug having a seventh channel with a cross-sectional area that is less than the sum of the minimum cross-sectional area of the third channel and the minimum cross-sectional area of the fourth channel,

wherein the cross section is a plane perpendicular to the first direction.

9. A forming device, characterized in that it comprises a preforming mould according to any one of claims 1 to 8, and further comprises a dipping tank for dipping the fibre yarn, one end of the dipping tank being connected to a second slug of the preforming mould, the other end of the dipping tank being provided with a yarn feeding aperture plate.

10. The molding apparatus of claim 9, further comprising a molding die coupled to the third slug of the preform die, the molding die configured to extrude the fiber strands through the preform die.