Die for producing polyurethane pure yarn product

Abstract

The utility model relates to a mould for producing a polyurethane pure yarn product, which comprises an injection box, a mould base, a mould core, a mould base, a mould core and a mould core, and is characterized in that the injection box is provided with an inner cavity for accommodating resin; the yarn guide part is arranged at one end of the injection box, the yarn guide part is provided with a yarn guide hole penetrating through the inner face and the outer face of the yarn guide part, and the yarn guide hole is communicated with the inner cavity; the forming part is arranged at the other end of the injection box, the forming part is provided with a forming cavity and a core rod located in the forming cavity and the inner cavity, and the forming cavity is communicated with the inner cavity; the fixing frame is installed in the forming cavity or the inner cavity and used for fixing the core rod, and the tail end of the core rod is fixedly connected with the yarn guide part; the fixed frame is arranged in the mold, the yarn guide plate is arranged at the outer end of the injection box, and the fixed frame and the yarn guide plate accurately position the position of the core rod, so that the length of the core rod is shortened, the processing deformation problem of the core rod is reduced, the original problem of poor straightness is solved, the stability is improved, and the occupied space of the mold is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of pultrusion dies, and in particular to a die for producing polyurethane pure yarn products. Background Art

[0002] Pultruded polyurethanes generally have low viscosity, moderate to high reactivity, good impact strength and toughness, and short beam shear properties. Compared with other materials, pultruded polyurethanes can produce a variety of benefits. It can increase the glass fiber content in the product and greatly improve the strength of the product. For example, a pultruded window frame made of glass fiber and polyurethane resin is 8 times stronger than a PVC window frame, and its conductivity is 40 times lower than aluminum, so it has much better insulation properties. At the same time, because polyurethane pultruded window frames are less brittle, they will not crack and are durable.

[0003] The polyurethane pure yarn door and window pultrusion molds currently used in the market are relatively large in size, and the wall thickness of the window frame product is adjusted by supporting the core rod with a small ejector pin set on the core rod. Since the ejector pin is small, the probability of breaking during use is relatively high. If a large ejector pin is used, it will affect the trend space of the yarn, and the core rod is easily deformed by relying on a few ejector pin fulcrums. After long-term use, the core rod will be deformed and it is not easy to adjust the product wall thickness. The core rod is relatively long and easy to deform, making it difficult to adjust the product wall thickness. Secondly, the injection box part has a relatively complex shape, resulting in low yarn threading efficiency. The ejector pin is thin and easy to break during use, requiring frequent shutdowns for maintenance, affecting production capacity and efficiency.

[0004] Therefore, it is necessary to develop a mold for producing a polyurethane pure yarn product to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a small-volume and stable mold for producing polyurethane pure yarn products.

[0006] To achieve the above object, the utility model provides the following technical solution: a mold for producing polyurethane pure yarn products, comprising:

[0007] An injection box having an inner cavity for containing resin;

[0008] A yarn guide portion, disposed at one end of the injection box, the yarn guide portion having a yarn guide hole penetrating both inner and outer surfaces thereof, the yarn guide hole being in communication with the inner cavity;

[0009] A molding part, arranged at the other end of the injection box, the molding part having a molding cavity, a core rod located in the molding cavity and the inner cavity, and the molding cavity is connected to the inner cavity;

[0010] A fixing frame is installed in the molding cavity or the inner cavity and is used to fix the core rod, and the end of the core rod is fixedly connected to the yarn guide part.

[0011] Furthermore, the fixing frame has a limiting through hole and a material passing hole, and both the limiting through hole and the material passing hole penetrate the inner and outer surfaces of the fixing frame.

[0012] Furthermore, the limiting through hole is located at the center of the fixing frame and is used to fix the core rod, and the material passing hole is arranged around the limiting through hole and is used for allowing materials to pass through.

[0013] Furthermore, the yarn guide portion includes a yarn guide plate having the yarn guide hole, and the yarn guide plate is mounted on one end of the injection box by means of fixing members such as bolts or screws.

[0014] Furthermore, the yarn guide portion further comprises a fixing block clamped with the yarn guide plate, and the fixing block is used to fix the core rod.

[0015] Furthermore, the number of the fixed blocks is a pair, a partition plate is provided between the pair of fixed blocks, the two ends of the partition plate support the opposite sides of the pair of fixed blocks, and the partition plate has the yarn guide holes, and the yarn guide holes penetrate the inner and outer surfaces of the partition plate.

[0016] Furthermore, the diameter of the inner cavity gradually decreases from one end to the other end, the end with a larger diameter is located at one side of the yarn guiding portion, and the end with a smaller diameter is located at one side of the forming portion.

[0017] Furthermore, the injection box has cooling ports, and the cooling ports respectively penetrate the injection box and can inject cooling liquid into the cooling ports to prevent colloids such as resin from solidifying in the inner cavity.

[0018] Furthermore, the molding part has a reflux interface, which passes through the molding part and is in communication with the molding cavity, and is used to collect the resin flowing into the molding cavity.

[0019] Furthermore, a connecting part is provided at the connection between the injection box and the molding part, and the connecting part includes a first connecting member and a second connecting member, the first connecting member is fixed to the outside of the injection box, and the second connecting member is fixed to the outside of the molding part, the first connecting member and the second connecting member are in a relatively parallel state and are fastened by fixing members such as screws and bolts.

[0020] Compared with the prior art, the beneficial effects of the utility model are: the utility model is a mold for producing polyurethane pure yarn products, which has the characteristics of small size and stability. By arranging a fixed frame in the mold and a yarn guide plate at the outer end of the injection box, the fixed frame and the yarn guide plate accurately position the core rod, shortening the length of the core rod, reducing the problem of core rod processing deformation, improving the original problem of poor straightness, improving stability, and reducing the space occupied by the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0022] Figure 1 The utility model is a three-dimensional structural schematic diagram of a mold for producing polyurethane pure yarn products;

[0023] Figure 2 for Figure 1 The schematic diagram of the injection box structure of the mold used for producing polyurethane pure yarn products is shown;

[0024] Figure 3 for Figure 2 Another structural schematic diagram of the injection box of the mold for producing polyurethane pure yarn products is shown;

[0025] Figure 4 for Figure 1 The schematic diagram of the yarn guide structure of the mold used for producing polyurethane pure yarn products is shown;

[0026] Figure 5 for Figure 1 The schematic diagram of the molding structure of the mold used for producing polyurethane pure yarn products is shown;

[0027] Figure 6 for Figure 1 The schematic diagram of the structure of the mold used to produce polyurethane pure yarn products is shown from another angle.

[0028] In the figure: 1. injection box; 2. yarn guide part; 3. molding part; 4. heating module; 5. connection part; 11. box body; 12. inner cavity; 111. bottom block; 112. top block; 113. side block; 13. injection port; 14. cooling port; 15. fixing frame; 151. limiting through hole; 152. feeding hole; 21. yarn guide plate; 22. fixing block; 23. yarn guide hole; 24. partition plate; 31. module; 32. molding cavity; 33. core rod; 34. reflux interface; 51. first connecting piece; 52. second connecting piece. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Please see Figures 1 to 6 The utility model is a mold for producing polyurethane pure yarn products, which includes an injection box 1, a yarn guide part 2 installed at one end of the injection box 1, a molding part 3 fixed at the other end of the injection box 1, and a heating module 4 surrounding the molding part 3.

[0031] Please see Figures 1 to 3 The injection box 1 includes a box body 11 and an inner cavity 12 formed in the box body 11. The box body 11 includes a bottom block 111, a top block 112 and a pair of side blocks 113. The bottom block 111 and the top block 112 are relatively parallel and recessed inward from opposite sides. The pair of side blocks 113 are relatively parallel and recessed inward from opposite sides. The upper and lower surfaces of the pair of side blocks 113 are respectively fixedly connected to the bottom block 111 and the top block 112, that is, the bottom block 111, the top block 112 and the pair of side blocks 113 are surrounded to form the inner cavity 12, and the shape of the inner cavity 12 can be changed according to needs.

[0032] The diameter of the inner cavity 12 gradually decreases from one end to the other end, that is, the inner cavity 12 in the injection box 1 has a larger diameter at one end and a smaller diameter at the other end. The end with the larger diameter is located on one side of the yarn guide part 2, and the end with the smaller diameter is located on one side of the molding part 3.

[0033] The injection box 1 also includes an injection port 13 and a cooling port 14. The injection port 13 penetrates the top block 112 vertically downward from the top of the top block 112 and is connected to the inner cavity 12. Resin or other colloids are injected into the inner cavity 12 through the injection port 13. The cooling port 14 has a pair, which respectively penetrate the top block 112 and the two sides of the cooling port 14. Coolant can be injected into the cooling port 14 to prevent the resin or other colloids from solidifying in the inner cavity 12.

[0034] Please see Figure 1 and Figure 4The yarn guiding part 2 includes a yarn guiding plate 21 and a fixing block 22 clamped with the yarn guiding plate 21. The yarn guiding plate 21 is installed on one end of the box body 11 by fixing parts such as bolts or screws. It has a plurality of yarn guiding holes 23. The plurality of yarn guiding holes 23 pass through the yarn guiding plate 21 and are connected with the inner cavity 12. In this embodiment, the diameters of the plurality of yarn guiding holes 23 are the same and are arranged around the fixing block 22. The number, position and spacing of the plurality of yarn guiding holes 23 can be changed according to needs. The number of the fixing blocks 22 is a pair and they are arranged oppositely. They pass through the yarn guiding plate 21 from the outside of the yarn guiding plate 21. A partition plate 24 is provided between the pair of fixing blocks 22. The two ends of the partition plate 24 support the opposite side of a pair of fixing blocks 22. It has yarn guiding holes 23. The yarn guiding holes 23 pass through the inner and outer surfaces of the partition plate 24.

[0035] Please see Figure 5 The molding part 3 includes a plurality of modules 31 and a molding cavity 32 formed by the plurality of modules 31. The plurality of modules 31 are fixedly connected by fixing members such as bolts or screws, and the molding cavity 32 formed therein can change shape according to demand.

[0036] Please see Figure 3 A fixing frame 15 is installed in the inner cavity 12, and its position is limited by the box body 11 and the forming part 3. The fixing frame 15 has a limiting through hole 151 and a feeding hole 152. The limiting through hole 151 and the feeding hole 152 both penetrate the inner and outer surfaces of the fixing frame 15. In this embodiment, the limiting through hole 151 is located at the center of the fixing frame 15, and the feeding hole 152 is arranged around the limiting through hole 151, so that the inner cavity 12 is connected with the forming cavity 32. The position of the fixing frame 15 is not limited to this embodiment, and can be arranged in the forming cavity 32 according to needs.

[0037] The forming part 3 also includes a core rod 33 located in the forming cavity 32. One end of the core rod 33 is located in the forming cavity 32, and the other end thereof passes through the limiting through hole 151 and extends into the inner cavity 12, and the end is fixedly connected to the fixing block 22. The limiting through hole 151 tightly fixes the core rod 33, and the fixing frame 15 and the fixing block 22 support the core rod 33 so that the core rod 33 is in a horizontal state. The shape and quantity of the core rod 33 can be changed according to needs.

[0038] The molding part 3 has a reflux interface 34 , which penetrates through the bottom of the modules 31 and communicates with the molding cavity 32 , and is used for collecting the resin flowing into the molding cavity 32 .

[0039] Please see Figure 1 and Figure 6A connecting part 5 is provided at the connection between the injection box 1 and the molding part 3. The connecting part 5 includes a first connecting member 51 and a second connecting member 52. The first connecting member 51 is fixed to the outer side of the injection box 1, which is perpendicular to the injection box 1. The second connecting member 52 is fixed to the outer side of the molding part 3, which is perpendicular to the molding part 3. The first connecting member 51 and the second connecting member 52 are in a relatively parallel state and are fastened by fixing members such as screws and bolts.

[0040] The heating modules 4 are fixed around the outside of several modules 31. In this embodiment, there are three pairs of heating modules 4. Each heating module 4 is L-shaped, respectively supporting the adjacent two side outer surfaces of several modules 31. Each pair of heating modules 4 is surrounded and fitted on the outer surface of the module 31, and the heating modules 4 transfer heat evenly to the module 31.

[0041] The utility model is a mold for producing polyurethane pure yarn products. When the mold is used, the materials enter the inner cavity 12 from the plurality of yarn guide holes 23 of the yarn guide plate 21 respectively, and the resin and other colloids are injected into the inner cavity 12 through the injection port 13. The materials are evenly wrapped on the surface of the materials. At the same time, coolant is injected into the cooling port 14 to prevent the resin and other colloids from solidifying in the inner cavity 12. The materials then enter the molding cavity 32 through the feed hole 152. The fixed frame 15 blocks the excess resin wrapped on the surface of the materials and keeps them in the inner cavity 12. The heating module 4 evenly transfers the heat to the module 31, so that the materials entering the molding cavity 32 are heated and molded.

[0042] The utility model is a mold for producing polyurethane pure yarn products, which has the characteristics of small size and stability. By arranging a fixed frame in the mold and a yarn guide plate at the outer end of an injection box, the fixed frame and the yarn guide plate accurately position the core rod, shortening the length of the core rod, reducing the problem of core rod processing deformation, improving the original problem of poor straightness, improving stability, and reducing the occupied space of the mold.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A mold for producing polyurethane pure yarn products, characterized in that: It includes: An injection box (1) having an inner cavity (12) for containing resin; A yarn guide portion (2) is provided at one end of the injection box (1), the yarn guide portion (2) having a yarn guide hole (23) penetrating both inner and outer surfaces thereof, the yarn guide hole (23) being in communication with the inner cavity (12); A molding part (3) is arranged at the other end of the injection box (1), the molding part (3) comprises a molding cavity (32), a core rod (33) located in the molding cavity (32) and the inner cavity (12), and the molding cavity (32) is connected to the inner cavity (12); A fixing frame (15) is installed in the molding cavity (32) or the inner cavity (12) and is used to fix the core rod (33). The end of the core rod (33) is fixedly connected to the yarn guide part (2).

2. The mold for producing polyurethane pure yarn products according to claim 1, characterized in that: The fixing frame (15) has a limiting through hole (151) and a material passing hole (152), and the limiting through hole (151) and the material passing hole (152) both penetrate the inner and outer surfaces of the fixing frame (15).

3. The mold for producing polyurethane pure yarn products according to claim 2, characterized in that: The limiting through hole (151) is located at the center of the fixing frame (15) and is used to fix the core rod (33). The material passing hole (152) is arranged around the limiting through hole (151) and is used to allow materials to pass through.

4. The mold for producing polyurethane pure yarn products according to claim 1, characterized in that: The yarn guide portion (2) comprises a yarn guide plate (21) having the yarn guide hole (23), and the yarn guide plate (21) is mounted on one end of the injection box (1) via a bolt or screw fixing.

5. The mold for producing polyurethane pure yarn products according to claim 4, characterized in that: The yarn guide portion (2) further comprises a fixing block (22) which is clamped with the yarn guide plate (21), and the fixing block (22) is used to fix the core rod (33).

6. The mold for producing polyurethane pure yarn products according to claim 5, characterized in that: The number of the fixed blocks (22) is a pair, and a partition plate (24) is provided between the pair of fixed blocks (22). The two ends of the partition plate (24) support the opposite sides of the pair of fixed blocks (22), and the partition plate (24) has the yarn guide hole (23), and the yarn guide hole (23) passes through the inner and outer surfaces of the partition plate (24).

7. The mold for producing polyurethane pure yarn products according to claim 1, characterized in that: The diameter of the inner cavity (12) gradually decreases from one end to the other end, the end with a larger diameter is located on one side of the yarn guide portion (2), and the end with a smaller diameter is located on one side of the molding portion (3).

8. The mold for producing polyurethane pure yarn products according to claim 1, characterized in that: The injection box (1) has a cooling port (14), and the cooling ports (14) respectively penetrate the injection box (1) and can inject cooling liquid into the cooling ports (14) to prevent the resin colloid from solidifying in the inner cavity (12).

9. The mold for producing polyurethane pure yarn products according to claim 1, characterized in that: The molding part (3) has a reflux interface (34), which passes through the molding part (3) and is in communication with the molding cavity (32), and is used to collect resin flowing into the molding cavity (32).

10. The mold for producing polyurethane pure yarn products according to claim 1, characterized in that: A connecting part (5) is provided at the connection between the injection box (1) and the molding part (3), and the connecting part (5) includes a first connecting member (51) and a second connecting member (52), wherein the first connecting member (51) is fixed to the outer side of the injection box (1), and the second connecting member (52) is fixed to the outer side of the molding part (3), and the first connecting member (51) and the second connecting member (52) are in a relatively parallel state and are fastened by screws and bolt fixing members.

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