Sealing strip extrusion die

Abstract

The invention discloses a sealing strip extrusion die, and relates to the technical field of sealing strip production equipment, the sealing strip extrusion die comprises a forming part, one side of the forming part is an input side, the other side of the forming part is an output side, the direction from the input side to the output side is the forming direction, the input side is provided with a third injection hole and an auxiliary injection hole group, and the auxiliary injection hole group is provided with a second injection hole. A first forming hole and an auxiliary forming hole set are formed in the forming part, a fifth forming hole is formed in the output side, the two ends of the first forming hole communicate with the third injection hole and the fifth forming hole correspondingly, and the auxiliary injection hole set and the fifth forming hole communicate with the auxiliary forming hole set correspondingly. Production of the sealing strip can be achieved through one mold, the input cost of the mold can be reduced, production procedures are reduced, and production efficiency is improved. Meanwhile, due to the fact that all the parts of the sealing strip are integrally formed in the same mold, the shape of the sealing strip and the connection strength of all the parts of the sealing strip can be guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of sealing strip production equipment, and in particular to a sealing strip extrusion die. Background Art

[0002] A sealing strip is a sealing component that realizes a sealed connection between two or more parts. For example, the sealing strip of a car window is used to achieve a seal between the window glass and the window frame. When the window glass moves, it is necessary to ensure a reliable seal between the sealing strip and the glass, and between the sealing strip and the window frame.

[0003] At present, such sealing strips are usually made of a material with a certain hardness, so the material selection needs to take into account both hardness and connection strength. If the hardness is too high, although the connection strength between the sealing strip and the window frame can be ensured, it will affect the sealing performance between the sealing strip and the window glass, and the resistance when the window glass is raised or lowered will also increase. If the hardness is too low, although the sealing performance between the sealing strip and the window glass can be ensured and the resistance when the window glass is raised or lowered can be reduced, the sealing strip is not only difficult to install due to its low hardness and poor rigidity, but also easy to fall off the window frame when in use. Therefore, sealing strips made of two or more different materials have emerged, which can achieve reliable sealing between the sealing strip and the window glass and ensure the connection strength between the sealing strip and the window frame.

[0004] This type of sealing strip usually first uses different molds to separately mold various materials, and then is produced by assembling them. Multiple molds are used for molding, and each part of the sealing strip needs to be molded separately, which increases the investment cost of the mold, high production cost, many production processes, and low production efficiency.

[0005] The patent with publication number CN110076977A discloses a car sealing strip extruder die, including an extruder connector, a drainage hole, a die connector, a guide groove, a first die plate, a first core rod, a screw hole, a positioning hole, a first die rubber inlet pipe, a second die structure, a third die structure, a fourth die structure and a fifth die structure. The setting of the first steel strip core rod, the steel strip bone and the second steel strip core rod in the patent is conducive to the assembly of the steel skeleton core and the die in the extrusion molding process, effectively controlling the supply amount of the steel strip rubber, facilitating the adjustment of the molding state of the sealing strip, and greatly reducing the scrap rate. However, it can only be connected to one extruder for producing sealing strips of one material. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a sealing strip extrusion die, which is used to solve the problems of high mold investment cost, multiple production processes and low production efficiency when the sealing strip is produced using multiple materials.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: A sealing strip extrusion die comprises a molding part, one side of the molding part is an input side, and the other side is an output side, the direction from the input side to the output side is a molding direction, a third injection hole and an auxiliary injection hole group are provided on the input side, a first molding hole and an auxiliary molding hole group are provided in the molding part, a fifth molding hole is provided on the output side, two ends of the first molding hole are respectively connected to the third injection hole and the fifth molding hole, and the auxiliary injection hole group and the fifth molding hole are respectively connected to the auxiliary molding hole group.

[0008] By adopting the above technical solution, a sealing strip extrusion mold of the present application can realize the production of sealing strips through a set of molds, which can reduce the investment cost of the molds, reduce the production process, and improve the production efficiency. At the same time, since the main body and the remaining parts of the sealing strip are integrally formed in the same mold, the shape of the sealing strip and the connection strength of each part of the sealing strip can be guaranteed.

[0009] Furthermore, the first molding hole and the auxiliary molding hole group are separated from each other, the auxiliary molding hole group includes a fourth molding hole, one end of the fourth molding hole is connected to the fifth molding hole, and the auxiliary injection hole group includes a second injection hole arranged on the input side, and the second injection hole is connected to the other end of the fourth molding hole.

[0010] By adopting the above technical solution, a sealing strip extrusion mold of the present application allows different raw materials to pass through the first molding hole and the fourth molding hole to respectively mold the main body and the remaining parts of the sealing strip, and then form an integral body in the fifth molding hole, thereby improving production efficiency and stabilizing product quality.

[0011] Furthermore, the auxiliary molding hole group includes a second molding hole and a third molding hole that are independent of each other, and the auxiliary injection hole group includes a first injection hole arranged on the input side, the two ends of the second molding hole are respectively connected to the first injection hole and the fifth molding hole, and the two ends of the third molding hole are respectively connected to the first injection hole and the fifth molding hole.

[0012] By adopting the above-mentioned technical scheme, different raw materials are respectively injected into the first molding hole, the second molding hole and the third molding hole of a sealing strip extrusion mold of the present application, and the main body and the remaining parts of the sealing strip are respectively molded, and then formed into one piece in the fifth molding hole, thereby improving production efficiency and stabilizing product quality.

[0013] Furthermore, the first molding hole is used to mold the main body of the sealing strip, the shape of the first molding hole corresponds to the shape of the main body, and the position of the fifth molding hole corresponding to the clamping portion of the sealing strip is connected to the third injection hole.

[0014] By adopting the above technical solution, a sealing strip extrusion die of the present application can separately mold the main body and the clamping part made of the same material, and form them into one piece in the fifth molding hole. Since the clamping part and the main body form a corner, this molding method can avoid the phenomenon of material shortage at the connection.

[0015] Furthermore, the second molding hole and the third molding hole are used to mold the sliding part of the sealing strip, and the fifth molding hole is connected to the first injection hole at a position corresponding to the sliding part of the sealing strip.

[0016] Since the sliding part is serpentine with bends and corners, by adopting the above technical solution, a sealing strip extrusion mold of the present application can divide the sliding part into three parts for separate molding, thereby avoiding material shortage at the corners and ensuring product quality.

[0017] Furthermore, a fourth injection hole is provided on the input side, and a portion of the fifth molding hole corresponding to the anti-sticking layer of the sealing strip is connected to the fourth injection hole.

[0018] By adopting the above technical solution, a sealing strip extrusion die of the present application can form the anti-sticking layer in the fifth forming hole and integrate it with the rest of the sealing strip, thereby improving production efficiency and stabilizing product quality.

[0019] Furthermore, the molding part includes a first molding sheet, a second molding sheet, a third molding sheet and a fourth molding sheet stacked in sequence along the molding direction, the input side is the side of the first molding sheet away from the second molding sheet, the output side is the side of the fourth molding sheet away from the second molding sheet, the first molding hole passes through the second molding sheet and the third molding sheet, the fifth molding hole is arranged through the fourth molding sheet, a second flow channel is provided on a side of the first molding sheet close to the second molding sheet, the second injection hole passes through the first molding sheet, the second molding sheet and the third molding sheet, one end of the second flow channel is connected to the third injection hole, and the other end is connected to an end of the first molding hole close to the first molding sheet; the fourth molding hole is arranged through the third molding sheet, a fourth flow channel is provided on a side of the second molding sheet close to the third molding sheet, one end of the fourth flow channel is connected to the second injection hole, and the other end is connected to an end of the fourth molding hole close to the second molding sheet.

[0020] By adopting the above technical solution, a sealing strip extrusion mold of the present application has four molding parts, which reduces the manufacturing difficulty of the mold, makes the mold easier to process and manufacture, and is also convenient for subsequent maintenance.

[0021] Furthermore, there are three independent fourth forming holes, and there are three fourth flow channels, which are respectively connected to one end of the three fourth forming holes, and the other ends of the three fourth flow channels are respectively connected to the first feeding holes, which respectively pass through the first forming sheet and the second forming sheet, and the first feeding holes are all connected to the second injection hole.

[0022] By adopting the above technical solution, a sealing strip extrusion die of the present application can simultaneously mold the three lips of the sealing strip, so that the hardness and elasticity of the three lips remain consistent.

[0023] Furthermore, the input side of the first forming sheet is covered with a feed die platform, the second injection hole and the third injection hole both penetrate the feed die platform, and three guide grooves are provided on a side of the feed die platform close to the first forming sheet, one end of the three guide grooves are connected to the second injection hole, and the other end of the three guide grooves are respectively connected to the three first feeding holes.

[0024] By adopting the above technical solution, a sealing strip extrusion mold of the present application can simultaneously divide the raw materials injected from a second injection hole into three paths, and then flow them into three feeding holes respectively, so that the pressure of the three paths of raw materials remains consistent, and thus the hardness and elasticity of the three lips formed subsequently remain consistent.

[0025] Further, the molding part includes a first molding sheet, a second molding sheet, a third molding sheet and a fourth molding sheet stacked in sequence along the molding direction, the input side is the side of the first molding sheet away from the second molding sheet, the first molding hole penetrates the second molding sheet and the third molding sheet, the fifth molding hole is penetrated and arranged on the fourth molding sheet, the first injection hole penetrates the first molding sheet, the second molding sheet and the third molding sheet, and the second molding hole and the third molding hole are both penetrated and arranged on the third molding sheet; the second molding sheet is penetrated and arranged with a second feed hole, and the second feed hole is connected with the third molding hole; the first molding sheet is provided with a first flow channel on a side close to the second molding sheet, one end of the first flow channel is connected with the first injection hole, and the other end is connected with the second feed hole; the second molding sheet is provided with a third flow channel on a side close to the third molding sheet, one end of the third flow channel is connected with the second molding hole, and the other end is connected with the first injection hole; the third molding sheet is provided with a seventh flow channel on a side close to the fourth molding sheet, one end of the seventh flow channel is connected with the first injection hole, and the part of the fifth molding hole corresponding to the sliding part of the sealing strip is connected with the other end of the seventh flow channel.

[0026] By adopting the above technical solution, a sealing strip extrusion mold of the present application has four molding parts, which reduces the manufacturing difficulty of the mold, makes the mold easier to process and manufacture, and is also convenient for subsequent maintenance.

[0027] Furthermore, a fifth molding sheet is fixedly connected to the output side of the molding part, a first product extrusion hole is penetrated through the fifth molding sheet, the first product extrusion hole is connected with the fifth molding hole, a twelfth flow channel is provided on a side of the fifth molding sheet close to the molding part, a portion of the first product extrusion hole corresponding to the friction layer of the sealing strip is connected with the edge of the twelfth flow channel, a connecting hole connected with the twelfth flow channel is provided on the fifth molding sheet, a heating mechanism is provided on the fifth molding sheet, and a heat insulation structure is provided between the fifth molding sheet and the molding part.

[0028] By adopting the above technical solution, a sealing strip extrusion mold of the present application can use plastic material to mold the friction layer on the sliding part of the sealing strip. Since the extrusion temperature of the rubber material is 70-100 degrees, if the temperature of the rubber material is higher than 100 degrees, the rubber will be vulcanized (cooked) in advance, resulting in particles on the surface of the product, thereby affecting the product quality. The molding temperature of plastic is 220℃, and if the temperature is too low, the plastic will be difficult to mold. The heat insulation structure can reduce the temperature impact of the heating mold table on the molding part when heating, thereby ensuring the smooth molding of the sealing strip.

[0029] Furthermore, the heating mechanism is a heating mold platform fixedly arranged on a side of the fifth molding sheet away from the molding part, a heating rod is inserted into the heating mold platform, and the heating mold platform is provided with a finished product lead-out hole at a position corresponding to the first product extrusion hole, the fifth molding sheet is provided with an eleventh flow channel connected to the connecting hole at one end on a side close to the heating mold platform, and the heating mold platform is provided with a fifth injection hole connected to the other end of the eleventh flow channel.

[0030] By adopting the above technical solution, a sealing strip extrusion mold of the present application can guide the plastic extruded by the plastic extruder into the fifth molding sheet and ensure the temperature of the plastic during its flow.

[0031] Furthermore, a first boss is fixedly provided on a side of the heating mold platform away from the forming portion, the first boss is close to a portion of the first product extrusion hole corresponding to the friction layer of the sealing strip, and the heating rod is inserted on the first boss.

[0032] By adopting the above technical solution, a sealing strip extrusion mold of the present application can not only ensure the temperature of the friction layer during molding, but also reduce the temperature impact on the rubber material of the sealing strip.

[0033] Furthermore, the edge of the twelfth flow channel is a flange lower than the side of the fifth molding sheet close to the molding part, the first product extrusion hole corresponds to the portion of the friction layer of the sealing strip corresponding to the flange, the friction layer is serpentine, and the flange is provided with a protrusion at a position corresponding to the corner of the friction layer, the side of the fifth molding sheet close to the molding part is flush with the end face of the protrusion, and the protrusion protrudes into the first product extrusion hole.

[0034] By adopting the above technical solution, a sealing strip forming mold of the present application can separate the friction layer of the formed sealing strip into three unconnected sections, which can ensure that the sealing strip bends smoothly when installed on the car, and ensures reliable contact between the friction layer and the slider on the car window glass. In addition, the flange can make the sliding part after molding thinner at the corner, which is conducive to the bending of the sliding part, making it easier for the sealing strip to match the window frame of the car. At the same time, when the sliding part is bent, it can also ensure that the connection part between the sliding part and the friction layer has a certain rigidity.

[0035] Furthermore, the heat insulation structure is a second boss fixedly arranged on a side of the fifth molding sheet close to the molding part, the second boss abuts against the output side of the molding part, and the first product extrusion hole passes through the second boss.

[0036] By adopting the above-mentioned technical scheme, a sealing strip molding mold of the present application makes the fifth molding piece form a hollow shape, reduces the heat transfer between the fifth molding piece and the fourth molding piece, ensures that the temperature of the molding part will not be too high, and further ensures that the rubber material injected into the first injection hole, the second injection hole, the third injection hole and the fourth injection hole will not be vulcanized prematurely in the molding part.

[0037] Furthermore, a wire feeding hole is provided on the input side of the forming part, a wire feeding rod is fixedly connected in the wire feeding hole, a through hole is provided through the wire feeding rod along its axial direction, and the inner end of the wire feeding rod extends into the first forming hole.

[0038] By adopting the above technical solution, a sealing strip forming mold of the present application can implant fiber filaments into the sealing strip, thereby increasing the tensile strength of the sealing strip.

[0039] The positive effects of the present invention are: 1. The present invention is provided with a molding part, and the molding part is provided with a first injection hole, a second injection hole, a third injection hole and a fourth injection hole, which are used to be connected to four extruders respectively and inject different rubber materials respectively. The materials output by the four extruders are used to mold the various parts of the sealing strip in the mold, and then are integrated into one in the fifth molding hole on the molding part, thereby forming a sealing strip. Therefore, the production of the sealing strip can be achieved through one mold, which can reduce the investment cost of the mold, reduce the production process, and improve the production efficiency. At the same time, since the various parts of the sealing strip are integrally molded in the same mold, the shape of the sealing strip and the connection strength of the various parts of the sealing strip can be guaranteed.

[0040] 2. A fifth molding sheet and a heating die table are provided on one side of the molding part. A fifth injection hole connected to the plastic extruder is provided on the heating die table, and a heat insulation structure is provided on the fifth molding sheet. The molten plastic is injected from the fifth injection hole. After the sealing strip is formed through the fifth molding hole, it passes through the fifth molding sheet. At this time, the molten plastic is coated on the sealing strip to form a fish scale-like friction layer. The friction layer is made of plastic material, and the surface is fish scale-like, with a low friction coefficient, which can reduce the resistance of the parts that are in friction with it during movement. Since the extrusion temperature of the rubber material is 70-100 degrees, if the temperature is higher than 100 degrees, the rubber will be vulcanized (cooked) in advance, resulting in particles on the surface of the finished sealing strip, thereby affecting the product quality. The molding temperature of the plastic is 220℃, and the plastic will be difficult to mold if the temperature is too low. The heating die table is set at the outermost side, so as to minimize the temperature impact of the heating die table on the molding part when heated, thereby ensuring the smooth molding of the sealing strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a stereogram of the present invention; Figure 2 yes Figure 1 Left side view; Figure 3 yes Figure 1 Right side view; Figure 4 yes Figure 1 The explosion Figure 1 ; Figure 5 yes Figure 1 The explosion Figure 2 ; Figure 6 yes Figure 5 Schematic diagram of the feeding die table after the cover plate is removed; Figure 7 yes Figure 4 A partial enlarged view of the middle I part; Figure 8 yes Figure 4 A partial enlarged view of the middle II part; Fig. 9 yes Figure 4 A partial enlarged view of the middle III section; Fig.10 yes Figure 5 A partial enlarged view of the middle IV section; Fig.11 yes Figure 5 A partial enlarged view of the middle V section; Fig.12 yes Figure 5 A partial enlarged view of the middle VI section; Fig.13 is a cross-sectional view of the sealing strip; Fig.14is a cross-sectional view of the secondary sealing strip; In the figure: 1. Feeding die; 2. Forming part; 3. Heating die; 4. Heating rod mounting hole; 5. Fifth injection hole; 6. First boss; 7. Mounting hole; 8. First injection hole; 9. Wire feeding hole; 10. Fourth injection hole; 11. Third injection hole; 12. Second injection hole; 13. First product extrusion hole; 14. Wire feeding rod; 15. Lip; 16. Anti-sticking layer; 17. Friction layer; 18. Sliding part; 19. Fiber filament; 20. Secondary sealing strip; 21. Clamping part; 22. First molding sheet; 23. Second molding sheet; 24. Main body; 25. Third molding sheet; 26. Fourth molding sheet; 27. Fifth molding sheet; 28. Finished product lead-out hole; 29. ​​Second product extrusion hole; 30. First feeding hole; 31. Second feeding hole; 32. First molding hole; 33. Second molding hole; 34. Third molding hole; 35. Fourth molding hole; 36. Boss; 37. The fifth forming hole; 38. The twelfth flow channel; 39. The second boss; 40. The notch; 41. The cover plate; 42. The first flow channel; 43. The second flow channel; 44. The third flow channel; 45. The fourth flow channel; 46. The fifth flow channel; 47. The seventh flow channel; 48. The eighth flow channel; 49. The ninth flow channel; 50. The tenth flow channel; 51. The guide groove; 52. The eleventh flow channel; 53. The connecting hole; 54. The flange. DETAILED DESCRIPTION

[0042] Example 1

[0043] Fig.13 The figure shows a sealing strip used on the window of a car, which is composed of a main body 24, a sliding part 18, a clamping part 21, two anti-adhesive layers 16 and four lips 15. The sliding part 18 is serpentine, and is connected to the right side of one end of the main body 24, wherein the two lips 15 are respectively connected to the other end and close to the other end of the main body 24, and the direction is right. The third lip 15 is connected to the left end of the main body 24 close to the sliding part 18, and the fourth lip 15 is connected to the right end of the sliding part 18. The clamping part 21 is connected to the left side of the main body 24. The main body 24 and the clamping part 21 are made of the same rubber material with a high hardness, and the hardness is Sha=80±5°. The hardness of the rubber material used by the sliding part 18, the two anti-adhesive layers 16 and the four lips 15 is lower than the material hardness of the main body 24.

[0044] like Figures 1 to 5As shown, a sealing strip extrusion die includes a cylindrical molding part 2, the left side of the molding part 2 is the input side, the right side is the output side, the direction from the input side to the output side is the molding direction (i.e., the direction from left to right), the input side is provided with a third injection hole 11 and an auxiliary injection hole group, the molding part 2 is provided with a first molding hole 32 and an auxiliary molding hole group, the output side is provided with a fifth molding hole 37, the two ends of the first molding hole 32 are respectively connected to the third injection hole 11 and the fifth molding hole 37, the auxiliary injection hole group and the fifth molding hole 37 are respectively connected to the auxiliary molding hole group. The shape of the fifth molding hole 37 corresponds to the shape of the sealing strip, the shape of the first molding hole 32 corresponds to the shape of the main body 24, and the first molding hole 32 is used to mold the main body 24.

[0045] The third injection hole 11 and the auxiliary injection hole group are connected to different rubber extruders, and one raw material enters the first molding hole 32 from the third injection hole 11 to form the shape of the main body 24. At the same time, the remaining raw materials enter the auxiliary molding hole group from the auxiliary injection hole group to form the remaining parts of the sealing strip (i.e., the sliding part 18, the clamping part 21, the two anti-adhesive layers 16 and the four lips 15), and then are extruded together from the fifth molding hole 37 to form the sealing strip.

[0046] Since the sealing strip can be produced by one mold, the mold investment cost can be reduced, the production process can be reduced, and the production efficiency can be improved. At the same time, since the main body 24 of the sealing strip and the remaining parts are integrally formed in the same mold, the shape of the sealing strip and the connection strength of each part of the sealing strip can be guaranteed.

[0047] Example 2

[0048] Combination Figures 6 to 12 As shown, the difference between this embodiment and embodiment 1 is that: The first forming hole 32 and the auxiliary forming hole group are separated from each other, and the auxiliary forming hole group includes three fourth forming holes 35 separated from each other. The shapes of the three fourth forming holes 35 correspond to the shapes of the three lips 15 on the same side of the sealing strip. The right ends of the three fourth forming holes 35 are connected to the fifth forming hole 37, and the auxiliary injection hole group includes a second injection hole 12 set on the input side. The left ends of the three fourth forming holes 35 are connected to the second injection hole 12. The portion of the fifth forming hole 37 corresponding to the fourth lip 15 is connected to the second injection hole 12.

[0049] The auxiliary molding hole group also includes a second molding hole 33 and a third molding hole 34 which are independent of each other. The shape of the second molding hole 33 corresponds to the shape of the middle part of the sliding part 18, and the shape of the third molding hole 34 corresponds to the shape of the part of the sliding part 18 close to the lip 15. The auxiliary injection hole group includes a first injection hole 8 arranged on the input side, and the two ends of the second molding hole 33 are respectively connected to the first injection hole 8 and the fifth molding hole 37, and the two ends of the third molding hole 34 are respectively connected to the first injection hole 8 and the fifth molding hole 37. The part of the fifth molding hole 37 corresponding to the clamping part 21 is connected to the third injection hole 11.

[0050] The second molding hole 33 and the third molding hole 34 are used to mold the middle portion of the sliding portion 18 and the portion of the sliding portion 18 close to the lip 15 . The fifth molding hole 37 is connected to the first injection hole 8 at a portion corresponding to the sliding portion 18 of the sealing strip.

[0051] A fourth injection hole 10 is provided on the input side, and the fifth molding hole 37 and the portion corresponding to the anti-sticking layer 16 are connected to the fourth injection hole 10. The first injection hole 8, the second injection hole 12, the third injection hole 11 and the fourth injection hole 10 are respectively used to inject different rubber materials.

[0052] Specifically, the forming part 2 includes a first forming sheet 22, a second forming sheet 23, a third forming sheet 25 and a fourth forming sheet 26 stacked from left to right, and the first forming sheet 22, the second forming sheet 23, the third forming sheet 25 and the fourth forming sheet 26 are all disc-shaped. The input side is the left side of the first forming sheet 22, and the output side is the right side of the fourth forming sheet 26.

[0053] A disc-shaped feed die table 1 is provided on the left side of the first forming sheet 22. The feed die table 1, the first forming sheet 22, the second forming sheet 23, the third forming sheet 25 and the fourth forming sheet 26 are all provided with mounting holes 7 and are fixedly connected to each other by screws passing through the mounting holes 7. To avoid misunderstanding, Figures 4 to 12 The mounting holes 7 are hidden in the figure. The edges of the feed die table 1, the first forming sheet 22, the second forming sheet 23 and the third forming sheet 25 are all provided with notches 40 for alignment.

[0054] Seen from the left side of the feed die table 1, starting from the upper part of the feed die table 1, the first injection hole 8, the second injection hole 12, the third injection hole 11 and the fourth injection hole 10 are sequentially arranged in a counterclockwise direction. The first injection hole 8, the second injection hole 12, the third injection hole 11 and the fourth injection hole 10 all penetrate the feed die table 1, the first molding sheet 22, the second molding sheet 23 and the third molding sheet 25.

[0055] The first molding hole 32 penetrates the second molding sheet 23 and the third molding sheet 25, the fifth molding hole 37 is set through the fourth molding sheet 26, and the second flow channel 43 is provided at the lower part of the right side of the first molding sheet 22. The lower end of the second flow channel 43 is connected to the third injection hole 11, and the upper end is connected to the left end of the first molding hole 32. The right side of the third molding sheet 25 is provided with a tenth flow channel 50 at its lower part, the lower end of the tenth flow channel 50 is connected to the third injection hole 11, and the position of the fifth molding hole 37 corresponding to the clamping portion 21 is connected to the upper end of the tenth flow channel 50.

[0056] The main body 24 and the clamping portion 21 are formed by the same rubber material injected from the third injection hole 11, and the molding process is as follows: The rubber material from the extruder is injected from the third injection hole 11 on the left side of the feed die table 1 and flows to the right. A part of it enters the left end of the first molding hole 32 on the second molding sheet 23 through the second flow channel 43, and then flows through the third molding sheet 25 and enters the fifth molding hole 37. A part of it passes through the tenth flow channel 50, is divided into two streams and enters the fifth molding hole 37, and the clamping part 21 is molded, and is fused with the main body 24 formed by the first molding hole 32 in the fifth molding hole 37.

[0057] Since the main body 24 is narrow, the clamping part 21 is connected to the main body 24 in a hook shape. The main body 24 and the clamping part 21 are formed separately and then integrated into the fifth molding hole 37. This can avoid the problem that the rubber has poor fluidity and is difficult to fill the mold cavity, thereby causing defects on the sealing strip or causing the sealing strip to be scrapped. Since the clamping part 21 is hook-shaped, in order to ensure that there is no shortage of material, the clamping part 21 is molded through the tenth flow channel 50 divided into two branches, so that the material can be filled in the corresponding part of the fifth molding hole 37 and the clamping part 21, avoiding the shortage of material or bubbles in the produced sealing strip.

[0058] Three fourth forming holes 35 are arranged through the third forming sheet 25, and three mutually independent fourth flow channels 45 are arranged on the right side of the second forming sheet 23. The outer ends of the three fourth flow channels 45 are connected to the second injection hole 12, and the inner ends are connected to the left ends of the corresponding fourth forming holes 35.

[0059] The first forming sheet 22 is provided with three mutually independent first material holes 30, and the three first material holes 30 penetrate the second forming sheet 23. The three fourth flow channels 45 correspond to the three first material holes 30 one by one, and the outer ends of the three fourth flow channels 45 are respectively connected to the corresponding first material holes 30, and the three first material holes 30 are all connected to the second injection hole 12.

[0060] A pit is provided on the right side of the feed die table 1, and three guide grooves 51 are provided in the pit. A cover plate 41 is fixedly connected to the pit by screws, and the three first feed holes 30 all penetrate the cover plate 41. One end of the three guide grooves 51 is connected to the second injection hole 12, and the other end is connected to the three first feed holes 30 respectively.

[0061] A ninth flow channel 49 is provided on the right side of the third molding sheet 25 , the outer end of the ninth flow channel 49 is connected to the second injection hole 12 , and the fifth molding hole 37 and the portion corresponding to the other lip 15 (i.e., the lip 15 on the same side of the main body 24 as the clamping portion 21 ) are connected to the inner end of the ninth flow channel 49 .

[0062] The four lips 15 are formed by the same rubber material injected from the second injection hole 12, and the forming process is as follows: After the rubber material from the extruder is injected from the second injection hole 12, a part of the rubber material is divided into three paths through the three guide grooves 51 and passes through the three first feeding holes 30 respectively, and then enters the three fourth molding holes 35 on the third molding sheet 25 through the three fourth flow channels 45 respectively, and then enters the fifth molding hole 37, and then merges with the corresponding part of the rubber strip to form three lips 15 located on the same side of the main body 24. Another part of the rubber material flows into the fifth molding hole 37 through the ninth flow channel 49, molds the fourth lip 15 on the other side of the main body 24, and merges with the main body 24.

[0063] Since the four lips 15 are located on both sides of the main body 24, three guide grooves 51 are provided across the first molding hole 32, thereby realizing the molding of the four lips 15. The rubber material is molded simultaneously on the three lips 15 on the same side through three parallel paths, which can ensure that the pressure during molding in the fourth molding hole 35 is consistent, and avoid the phenomenon of material shortage.

[0064] The second forming hole 33 and the third forming hole 34 are both provided through the third forming sheet 25. The second forming sheet 23 is provided with a second material passing hole 31, and the right end of the second material passing hole 31 is connected with the left end of the third forming hole 34. The first flow channel 42 is provided on the right side of the first forming sheet 22 at its upper part, and the outer end of the first flow channel 42 is connected with the first injection hole 8, and the inner end is connected with the left end of the second material passing hole 31.

[0065] The right side of the second molding piece 23 is provided with a third flow channel 44 at its upper part, the upper end of the third flow channel 44 is connected to the first injection hole 8, and the lower end of the third flow channel 44 is connected to the left end of the second molding hole 33. The right side of the third molding piece 25 is provided with a seventh flow channel 47 at its upper part, the upper end of the seventh flow channel 47 is connected to the first injection hole 8, and the part of the sliding part 18 close to the main body 24 is a connecting part, and the position of the connecting part corresponding to the fifth molding hole 37 is connected to the lower end of the seventh flow channel 47.

[0066] The sliding part 18 is formed by the same rubber material injected from the first injection hole 8, and the molding process is as follows: After the rubber material from the extruder is injected from the first injection hole 8, a part of it flows through the first flow channel 42 and the second feed hole 31, and then flows into the third molding hole 34 to mold the portion of the sliding part 18 near the lip 15. A part of the rubber material flows through the third flow channel 44 and then flows into the second molding hole 33 to mold the middle part of the sliding part 18. After that, they enter the fifth molding hole 37 together, and another part of the rubber material enters the fifth molding hole 37 through the seventh flow channel 47 to form the sliding part 18 together and merge with the main body 24.

[0067] Since the sliding portion 18 is serpentine, with bends and corners, the sliding portion 18 is divided into three parts for molding, which can avoid the shortage of materials at the corners, thereby ensuring the quality of the product.

[0068] Two eighth flow channels 48 are also provided on the right side of the third molding sheet 25. The outer ends of the two eighth flow channels 48 are connected to the fourth injection hole 10. The two eighth flow channels 48 correspond one-to-one to the two anti-sticking layers 16 of the sealing strip, and the parts of the fifth molding hole 37 corresponding to the anti-sticking layer 16 are respectively connected to the inner ends of the corresponding eighth flow channels 48.

[0069] The rubber material from the extruder enters the fourth injection hole 10, and then flows through the two eighth flow channels 48 to the edges of the fifth molding hole 37 corresponding to the anti-adhesion layer 16, and the two anti-adhesion layers 16 are molded. The anti-adhesion layer 16 plays the role of aesthetics and preventing adhesion.

[0070] A fiber filament 19 is provided in each of the main body 24 and the sliding part 18 of the sealing strip, which is used to increase the tensile strength of the sealing strip. Two wire feeding holes 9 are provided on the left side of the feed die 1, and a wire feeding rod 14 is fixedly connected to the wire feeding hole 9 by threads. The wire feeding hole 9 passes through the wire feeding rod 14 and a through hole is provided along its axial direction. The inner end of one wire feeding rod 14 extends into the first forming hole 32, and the inner end of the other wire feeding rod 14 extends into the second forming hole 33.

[0071] The fiber filament 19 passes through the wire feeding rod 14. When the sliding part 18 and the main body 24 are being formed, the rubber material will drive the fiber filament 19 to the right during the flow from left to right, so that the fiber filament 19 is buried in the sealing strip to increase the tensile strength of the sealing strip.

[0072] Example 3

[0073] The difference between this embodiment and embodiment 2 is that: A friction layer 17 is provided on the inner side of the sliding portion 18 , and a friction layer 17 is also provided on a portion of the main body 24 close to the sliding portion 18 .

[0074] A disc-shaped fifth molding piece 27 is fixedly connected to the right side of the fourth molding piece 26 by screws. The fifth molding piece 27 is penetrated by a first product extrusion hole 13 having the same shape as the sealing strip. The first product extrusion hole 13 is connected to the fifth molding hole 37. A twelfth flow channel 38 is provided on the left side of the fifth molding piece 27. The portion of the first product extrusion hole 13 corresponding to the friction layer 17 is connected to the edge of the twelfth flow channel 38. The fifth molding piece 27 is penetrated by a connecting hole 53 connected to the twelfth flow channel 38. A heating mechanism is provided on the fifth molding piece 27, and a heat insulation structure is provided between the fifth molding piece 27 and the molding part 2.

[0075] The heating mechanism is a disc-shaped heating die table 3 fixed by screws on the right side of the fifth molding piece 27, a heating rod is inserted into the heating die table 3, and a finished product outlet hole 28 is provided at a position corresponding to the first product extrusion hole 13. The size of the finished product outlet hole 28 is larger than the outer size of the first product extrusion hole 13. The right side of the fifth molding piece 27 is provided with an eleventh flow channel 52 whose inner end is connected to the connecting hole 53, and the heating die table 3 is provided with a fifth injection hole 5 connected to the outer end of the eleventh flow channel 52.

[0076] A first boss 6 is fixedly provided on the right side of the heating mold platform 3 , the first boss 6 is close to the first product extrusion hole 13 and the position corresponding to the friction layer 17 , the heating rod is inserted into the heating rod mounting hole 4 on the first boss 6 , and the fifth injection hole 5 passes through the first boss 6 .

[0077] The molten plastic is injected from the right end of the fifth injection hole 5 of the first boss 6, and then flows out from the edge of the twelfth flow channel 38 through the eleventh flow channel 52, the connecting hole 53 and the twelfth flow channel 38 in sequence. After the sealing strip is formed through the fifth molding hole 37, it passes through the first product extrusion hole 13. At this time, the molten plastic in the twelfth flow channel 38 is coated on the sealing strip, thereby forming a fish scale-like friction layer 17.

[0078] The friction layer 17 is made of plastic and has a molding temperature of 220°C. It will be difficult to mold if the temperature is too low. Its friction coefficient is low, which can reduce the resistance of the parts that cooperate with it during movement. Since the extrusion temperature of the rubber material is 70-100 degrees, if it is higher than 100 degrees, the rubber will be vulcanized (cooked) in advance, resulting in particles on the surface of the product, thus affecting the product quality. The fifth molding sheet 27 is set on the right side of the fourth molding sheet 26, and the heating mold table 3 is set on the right side of the fifth molding sheet 27, so as to minimize the temperature impact of the heating mold table 3 on the first molding sheet 22, the second molding sheet 23, the third molding sheet 25 and the fourth molding sheet 26 on the left side of the fifth molding sheet 27, thereby ensuring the smooth molding of the sealing strip.

[0079] Since the first boss 6 on which the heating rod is installed is close to the first product extrusion hole 13 and the portion corresponding to the friction layer 17, the size of the finished product outlet hole 28 is larger than the external size of the first product extrusion hole 13, and thus the sealing strip coming out of the first product extrusion hole 13 does not contact the heating mold table 3, thereby ensuring the temperature of the friction layer 17 during molding and reducing the impact on the rubber material of the sealing strip.

[0080] The edge of the twelfth flow channel 38 is a flange 54 which is lower than the fifth molding sheet 27 and is close to the molding portion 2. The first product extrusion hole 13 corresponds to the portion of the friction layer 17 of the sealing strip and corresponds to the flange 54. The friction layer 17 is serpentine. The flange 54 is provided with two protrusions 36 at positions corresponding to the corners of the friction layer 17. The side of the fifth molding sheet 27 close to the molding portion 2 is flush with the end face of the protrusion 36, and the protrusion 36 protrudes into the first product extrusion hole 13.

[0081] Therefore, after the friction layer 17 is formed, three sections that are not connected to each other will be formed on the main body 24 and the sliding part 18. Since the hardness of plastic is higher than that of rubber, and the sealing strip needs to be bent during installation, the friction layer 17 is divided into three sections that are not connected to each other by two flanges 54, which can ensure that the sealing strip is smoothly bent and the friction layer 17 can be reliably in contact with the slider on the window glass. In addition, the flange 54 can make the sliding part 18 thinner at the corner after molding, which is conducive to the bending of the sliding part 18 and makes it easier for the sealing strip to match the window frame of the car. When the sliding part 18 is bent, it can also ensure that the connection part between the sliding part 18 and the friction layer 17 has a certain rigidity.

[0082] The heat insulation structure is a second boss 39 fixedly arranged on a side of the fifth molding sheet 27 close to the molding portion 2 . The second boss 39 abuts against the right side of the fourth molding sheet 26 , and the first product extrusion hole 13 passes through the second boss 39 .

[0083] The left side of the fifth molding sheet 27 is provided with a mounting hole boss along its circumferential direction, and the mounting hole boss is punched with a mounting hole, and the mounting hole penetrates the heating mold table 3 (to avoid misunderstanding, Figure 4 , Figure 5 and Fig. 9 The mounting holes are hidden in the middle picture).

[0084] By providing a heat insulation structure, the transmission of heat between the fifth molding sheet 27 and the fourth molding sheet 26 can be further reduced, thereby ensuring the temperature of the friction layer 17 during molding and further reducing the temperature impact on the first molding sheet 22, the second molding sheet 23, the third molding sheet 25 and the fourth molding sheet 26.

[0085] The third molding sheet 25 is provided with a second product extrusion hole 29 beside the first molding hole 32. The second product extrusion hole 29 passes through the fourth molding sheet 26 and the fifth molding sheet 27 to the right in sequence. A fifth flow channel 46 is provided on the right side of the second molding sheet 23. The outer end of the fifth flow channel 46 is connected to the third injection hole 11, and the inner end is connected to the left end of the second product extrusion hole 29 on the third molding sheet 25.

[0086] The rubber material in the third injection hole 11 flows into the second product extrusion hole 29 through the fifth flow channel 46 to form a Fig.14 The secondary sealing strip 20 shown has an X-shaped cross section, so that two sealing strips can be produced simultaneously through a set of molds, thereby improving production efficiency and reducing mold investment costs. After the secondary sealing strip 20 is extruded from the second product extrusion hole 29, it passes through the finished product outlet hole 28.

[0087] In actual production, the material injected into the first injection hole 8 is EPDM903, the material injected into the second injection hole 12 is SS95 rubber slip material, the material injected into the third injection hole 11 is EPDM851, the material injected into the fourth injection hole 10 is EPDM603, and the material injected into the fifth injection hole 5 is PER slip material.

[0088] The fifth molding sheet 27 is hollowed out and connected to the heating mold stage 3. The heat of the heating mold stage 3 can be directly transferred to the fifth molding sheet 27, which can ensure the vulcanization temperature of the PER sliding material. The fifth molding sheet 27 and the fourth molding sheet 16 are hollowed out at the joint position, which reduces the contact area between the fifth molding sheet 27 and the fourth molding sheet 16, thereby reducing the heat transfer between the fifth molding sheet 27 and the fourth molding sheet 16, ensuring that the temperature of the molding part 2 will not be too high, and ensuring that the rubber material injected into the first injection hole 8, the second injection hole 12, the third injection hole 11 and the fourth injection hole 10 will not be vulcanized prematurely in the molding part 2.

[0089] The above embodiments are described in detail and specifically, and express the preferred embodiments of the present invention. They are only used to illustrate the technical ideas and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. However, they are not limited to the present invention. The patent scope of the present invention cannot be limited only by this embodiment. That is, any equivalent changes or modifications made to the spirit disclosed by the present invention, for researchers or technicians in the field, without departing from the structure of the present invention, local improvements within the system and changes and conversions between subsystems, etc., are still within the patent scope of the present invention.

Claims

1. A sealing strip extrusion die, characterized in that: The invention comprises a molding part (2), one side of the molding part (2) is an input side, and the other side is an output side, the direction from the input side to the output side is a molding direction, a third injection hole (11) and an auxiliary injection hole group are provided on the input side, a first molding hole (32) and an auxiliary molding hole group are provided in the molding part (2), a fifth molding hole (37) is provided on the output side, two ends of the first molding hole (32) are respectively connected to the third injection hole (11) and the fifth molding hole (37), and the auxiliary injection hole group and the fifth molding hole (37) are respectively connected to the auxiliary molding hole group.

2. A sealing strip extrusion die according to claim 1, characterized in that: The first molding hole (32) and the auxiliary molding hole group are separated from each other, the auxiliary molding hole group includes a fourth molding hole (35) for molding the lip portion (15) of the sealing strip, one end of the fourth molding hole (35) is connected to the fifth molding hole (37), and the auxiliary injection hole group includes a second injection hole (12) arranged on the input side, the second injection hole (12) is connected to the other end of the fourth molding hole (35).

3. The sealing strip extrusion die according to claim 1, characterized in that: The auxiliary molding hole group comprises a second molding hole (33) and a third molding hole (34) which are independent of each other, and the auxiliary injection hole group comprises a first injection hole (8) arranged on the input side, the two ends of the second molding hole (33) are respectively connected to the first injection hole (8) and the fifth molding hole (37), and the two ends of the third molding hole (34) are respectively connected to the first injection hole (8) and the fifth molding hole (37).

4. A sealing strip extrusion die according to claim 3, characterized in that: The second molding hole (33) and the third molding hole (34) are used to mold the sliding portion (18) of the sealing strip, and the fifth molding hole (37) is connected to the first injection hole (8) at a position corresponding to the sliding portion (18) of the sealing strip.

5. The sealing strip extrusion die according to claim 2, characterized in that: The molding portion (2) comprises a first molding sheet (22), a second molding sheet (23), a third molding sheet (25) and a fourth molding sheet (26) which are stacked in sequence along a molding direction; the input side is a side of the first molding sheet (22) away from the second molding sheet (23); the output side is a side of the fourth molding sheet (26) away from the second molding sheet (23); the first molding hole (32) penetrates the second molding sheet (23) and the third molding sheet (25); the fifth molding hole (37) is provided on the fourth molding sheet (26); a second flow channel (43) is provided on a side of the first molding sheet (22) close to the second molding sheet (23); The second injection hole (12) passes through the first molding sheet (22), the second molding sheet (23) and the third molding sheet (25); one end of the second flow channel (43) is connected to the third injection hole (11), and the other end is connected to an end of the first molding hole (32) close to the first molding sheet (22); the fourth molding hole (35) is arranged on the third molding sheet (25); a fourth flow channel (45) is provided on a side of the second molding sheet (23) close to the third molding sheet (25); one end of the fourth flow channel (45) is connected to the second injection hole (12), and the other end is connected to an end of the fourth molding hole (35) close to the second molding sheet (23).

6. A sealing strip extrusion die according to claim 5, characterized in that: The fourth forming holes (35) are three independent ones, the fourth flow channels (45) are three, one end of the three fourth flow channels (45) is respectively connected to one end of the three fourth forming holes (35), the other ends of the three fourth flow channels (45) are respectively connected to the first material passing holes (30), the three first material passing holes (30) respectively penetrate the first forming sheet (22) and the second forming sheet (23), and the three first material passing holes (30) are all connected to the second injection hole (12); The input side of the first forming sheet (22) is covered with a feed die table (1), the second injection hole (12) and the third injection hole (11) both penetrate the feed die table (1), and a side of the feed die table (1) close to the first forming sheet (22) is provided with three guide grooves (51), one end of the three guide grooves (51) are connected to the second injection hole (12), and the other ends of the three guide grooves (51) are respectively connected to the corresponding first feed holes (30).

7. The sealing strip extrusion die according to claim 3, characterized in that: The molding part (2) comprises a first molding sheet (22), a second molding sheet (23), a third molding sheet (25) and a fourth molding sheet (26) which are stacked in sequence along a molding direction; the input side is a side of the first molding sheet (22) away from the second molding sheet (23); the first molding hole (32) penetrates the second molding sheet (23) and the third molding sheet (25); the fifth molding hole (37) is arranged on the fourth molding sheet (26); the first injection hole (8) penetrates the first molding sheet (22), the second molding sheet (23) and the third molding sheet (25); the second molding hole (33) and the third molding hole (34) are both arranged on the third molding sheet (25); the second molding sheet (23) is provided with a second feeding hole (31); the second feeding hole (31) is connected to the first injection hole (8); The first molding sheet (22) is provided with a first flow channel (42) on a side close to the second molding sheet (23), one end of the first flow channel (42) is connected to the first injection hole (8), and the other end is connected to the second feed hole (31); the second molding sheet (23) is provided with a third flow channel (44) on a side close to the third molding sheet (25), one end of the third flow channel (44) is connected to the second molding hole (33), and the other end is connected to the first injection hole (8); the third molding sheet (25) is provided with a seventh flow channel (47) on a side close to the fourth molding sheet (26), one end of the seventh flow channel (47) is connected to the first injection hole (8), and the part of the fifth molding hole (37) corresponding to the sliding part (18) of the sealing strip is connected to the other end of the seventh flow channel (47).

8. The sealing strip extrusion die according to claim 1, characterized in that: A fifth molding sheet (27) is fixedly connected to the output side of the molding part (2); a first product extrusion hole (13) is penetrated through the fifth molding sheet (27); the first product extrusion hole (13) is communicated with the fifth molding hole (37); a twelfth flow channel (38) is provided on a side of the fifth molding sheet (27) close to the molding part (2); a portion of the first product extrusion hole (13) corresponding to the friction layer (17) of the sealing strip is communicated with an edge of the twelfth flow channel (38); a connecting hole (53) is provided on the fifth molding sheet (27) and is communicated with the twelfth flow channel (38); a heating mechanism is provided on the fifth molding sheet (27); and a heat insulation structure is provided between the fifth molding sheet (27) and the molding part (2).

9. The sealing strip extrusion die according to claim 8, characterized in that: The heating mechanism is a heating die table (3) fixedly arranged on a side of the fifth molding sheet (27) away from the molding portion (2), a heating rod being inserted into the heating die table (3), the heating die table (3) being provided with a finished product outlet hole (28) at a position corresponding to the first product extrusion hole (13), the fifth molding sheet (27) being provided with an eleventh flow channel (52) connected to the connecting hole (53) at one end on a side close to the heating die table (3), and the heating die table (3) being provided with a fifth injection hole (5) connected to the other end of the eleventh flow channel (52); The edge of the twelfth flow channel (38) is a flange (54) lower than the side of the fifth molding sheet (27) close to the molding portion (2); the first product extrusion hole (13) corresponds to the friction layer (17) of the sealing strip and the flange (54); the friction layer (17) is serpentine; the flange (54) is provided with a protrusion (36) at a position corresponding to the corner of the friction layer (17); the side of the fifth molding sheet (27) close to the molding portion (2) is flush with the end surface of the protrusion (36); and the protrusion (36) protrudes into the first product extrusion hole (13); The heat insulation structure is a second boss (39) fixedly arranged on a side of the fifth molding sheet (27) close to the molding portion (2), the second boss (39) abuts against the output side of the molding portion (2), and the first product extrusion hole (13) passes through the second boss (39).

10. The sealing strip extrusion die according to claim 9, characterized in that: A first boss (6) is fixedly provided on a side of the heating die table (3) away from the forming portion (2); a portion of the first product extrusion hole (13) corresponding to the friction layer (17) of the sealing strip is close to the first boss (6); and the heating rod is inserted into the first boss (6).

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