Cooling forming device for polyphenylene sulfide composite material

Abstract

The utility model discloses a cooling forming device for a polyphenylene sulfide composite material, relates to the technical field of composite material cooling, and solves the problems that the internal stress of a product is increased and the shape of the product is deformed due to the fact that the uniformity of the temperature in the cooling process cannot be kept due to the change of mold design and external temperature in the prior art. A cooling forming device for a polyphenylene sulfide composite material comprises an injection molding machine, a heat preservation cover is arranged above a mold of the injection molding machine, a plurality of constant-temperature pipes are evenly arranged in the heat preservation cover, and the two ends of each constant-temperature pipe are connected with a first large-diameter pipe and a second large-diameter pipe respectively; a discharging groove is formed in the position, corresponding to the lower portion of the mold, of the rack, a bottom heat preservation plate is connected into the discharging groove in an up-down sliding mode, and the lower end of the bottom heat preservation plate is connected with a second air cylinder. The device has the beneficial effects that the temperature is kept uniform in the product cooling process, and internal stress increase and shape deformation caused by temperature difference are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material cooling, in particular to a cooling and molding device for a polyphenylene sulfide composite material. Background Art

[0002] Polyphenylene sulfide is a high-performance thermoplastic resin with excellent properties of high temperature resistance and corrosion resistance. It also has certain mechanical strength, chemical stability and thermal stability, and can maintain stable performance in extreme environments. Polyphenylene sulfide composite materials have been widely used in the automotive industry, electronics, aerospace and other fields due to their excellent performance.

[0003] When polyphenylene sulfide is injected, its melting rate is usually controlled at 20-150g / min, and most of the carbon fibers or fillers used need to be reinforced or chemically modified; the injection molding machine used for injection molding generally selects a screw injection molding machine, and the heating temperature should reach 200-350℃ and the injection pressure should reach 50-150MPa during injection molding. The crystallinity of the injection molded products obtained at low mold temperature (below 90℃) is generally low, generally 20%-30%, and at higher mold temperature (120-220℃), 50%-60% high crystallinity products can be obtained; the barrel temperature is controlled at 300-350℃, the injection pressure is controlled at 65-130MPa, the mold temperature is controlled at 120-200℃, the holding time is controlled at 30-120h, and the molding shrinkage is about 0.25%-0.75%.

[0004] Polyphenylene sulfide composite materials are composite materials based on polyphenylene sulfide resin. They inherit the excellent properties of polyphenylene sulfide and can further improve the comprehensive performance of polyphenylene sulfide by compounding with different materials. For example, polyphenylene sulfide plus carbon fiber composite materials have higher mechanical strength and rigidity. At the same time, polyphenylene sulfide also has good molding and processing performance, and can be prepared into products of various shapes through a variety of molding processes; during the molding process of polyphenylene sulfide composite materials, polyphenylene sulfide and composite materials are heated to a molten state, and the composite materials are homogenized in polyphenylene sulfide, and then molded by extrusion molding, injection molding and other processes. The molded products need to go through a cooling process to solidify their shape and improve their mechanical properties.

[0005] The current injection molding machine structure is generally as described in a quick-mold injection mold and injection molding machine disclosed in patent application number "CN202221927728.5", including: an injection molding frame, an injection mold, a clamping assembly and a synchronous drive assembly, the clamping assembly and the synchronous drive assembly are located inside the injection molding frame, the injection molding machine is fixedly installed on the surface of the injection molding frame, the clamping assembly includes a guide rail, a support slide, a dynamic pressure plate and a static pressure plate, the guide rail is fixedly installed on the surface of the injection molding frame, the support slide is slidably installed on the surface of the guide rail, and the injection mold includes a dynamic module and a fixed module. However, during the cooling and molding process of this utility model, due to changes in the external temperature and mold design, the temperature uniformity of the polyphenylene sulfide composite material during the cooling process cannot be maintained, and the temperature difference will cause the internal stress of the product to increase and the shape to deform, which is prone to poor molding and substandard product quality.

[0006] Therefore, the utility model proposes a cooling molding device for a polyphenylene sulfide composite material, which is used to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a cooling molding device for a polyphenylene sulfide composite material, which is used to solve the problem in the prior art that the uniformity of temperature during the cooling process cannot be maintained due to mold design and external temperature changes, which leads to increased internal stress and shape deformation of the product.

[0008] The technical solution adopted by the utility model to solve its technical problems is:

[0009] A cooling molding device for a polyphenylene sulfide composite material comprises an injection molding machine and a cooling device, wherein the injection molding machine comprises a frame, a clamping device and an injection device are sequentially arranged on the frame, the clamping device comprises a mold, a clamping mechanism and a demolding mechanism, the clamping mechanism and the demolding mechanism are both connected to the frame through a bracket, the clamping mechanism and the demolding mechanism push the mold to move in the bracket, a heat preservation cover is arranged above the mold, a first cylinder is connected between the heat preservation cover and the frame, a plurality of constant temperature tubes are evenly arranged in the heat preservation cover, the constant temperature tubes are bent in the heat preservation cover, the two ends of the constant temperature tubes are respectively connected to a first large diameter tube and a second large diameter tube, and the opposite ends of the first large diameter tube and the second large diameter tube are both connected to a constant temperature water tank; a feed chute is opened below the frame corresponding to the mold, a bottom heat preservation plate is connected in the feed chute to slide up and down, and a second cylinder is connected to the lower end of the bottom heat preservation plate.

[0010] By adopting the above technical solution, the temperature can be kept uniform and stable during the cooling process of the product, avoiding the increase of internal stress and shape deformation caused by temperature difference, and ensuring the high crystallinity and high performance of the molded product.

[0011] Furthermore, a material discharge plate is connected to the lower end of the material discharge chute, the material discharge plate is arranged at an inclination, and baffles are arranged on both sides of the material discharge plate.

[0012] By adopting the above technical solution, the formed products can be collected in a centralized manner under the guidance of the baffle, thereby preventing the formed products from scattering during the sliding process.

[0013] Furthermore, the second cylinder is connected to the bottom insulation board via a connecting block, the bottom insulation board is rotatably connected to the connecting block, and an articulated cylinder is connected between the connecting block and the bottom insulation board.

[0014] By adopting the above technical solution, the bottom insulation plate can be rotated around the connecting block through the operation of the articulated cylinder, so that the formed product can be pushed from the discharge chute to the inclined discharge plate, thereby achieving the connection of the formed product, avoiding damage caused by impact during the falling process of the formed product, and ensuring the integrity of the formed product.

[0015] Furthermore, the blanking plate is provided with a groove corresponding to the bottom insulation plate, and the bottom insulation plate can be embedded in the blanking plate.

[0016] By adopting the above technical solution, the formed products slide down along the blanking plate and can be collected centrally, thereby improving the blanking efficiency.

[0017] Furthermore, a rotating plate is rotatably connected to the bottom insulation plate, a gear assembly is arranged at the bottom of the rotating plate, a driving motor is connected to the lower end of the bottom insulation plate, the driving motor drives the gear assembly to rotate, a stopper is connected to the rotating plate, and a slot is opened in the bracket corresponding to the stopper.

[0018] By adopting the above technical solution, the molded product can be limited.

[0019] Furthermore, a positioning block is provided on the frame corresponding to the water cooling pipe of the mold, and a groove is provided on the heat preservation cover corresponding to the positioning block.

[0020] By adopting the above technical solution, rapid cooling can be achieved to shorten the production cycle and ensure product quality. At the same time, the positioning block ensures the stability of the water-cooling pipe and ensures the cooling effect.

[0021] Furthermore, a sealing strip is provided between the heat-insulating cover and the frame.

[0022] By adopting the above technical solution, the influence of the external environment on the mold temperature is reduced, ensuring the temperature stability inside the mold.

[0023] In summary, compared with the prior art, the utility model has the following beneficial effects:

[0024] 1. The utility model can maintain the temperature of the mold through the water cooling pipe of the mold, and the heat preservation cover maintains the temperature of the mold and its surroundings stable through the circulating water in the constant temperature pipe, thereby ensuring the uniform cooling and molding of the composite material, and can maintain a uniform and stable temperature during the cooling process of the product, avoiding the increase of internal stress and shape deformation caused by temperature difference, and ensuring the high crystallinity and high performance of the molded product.

[0025] 2. The bottom insulation plate of the utility model moves downward under the drive of the second cylinder, and at the same time the articulated cylinder works to rotate the bottom insulation plate around the connecting block, thereby pushing the formed products from the discharge chute to the inclined discharge plate. The formed products slide along the discharge plate, which improves the discharge efficiency and is collected under the guidance of the baffle, preventing the formed products from scattering during the sliding process and avoiding damage caused by impact during the falling process of the formed products, thereby ensuring the integrity of the formed products and improving the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a vertical schematic diagram of the utility model;

[0027] Figure 2 It is a schematic diagram of the internal structure of the utility model;

[0028] Figure 3 It is a partial cross-section diagram of the utility model Figure 1 ;

[0029] Figure 4 It is a partial cross-section diagram of the utility model Figure 2 ;

[0030] Figure 5 It is a rear view of the utility model;

[0031] In the figure: 1. frame; 2. injection device; 3. mold; 4. clamping mechanism; 5. demoulding mechanism; 6. bracket; 7. insulation cover; 8. sealing strip; 9. first cylinder; 10. constant temperature tube; 11. first large diameter tube; 12. second large diameter tube; 13. unloading chute; 14. bottom insulation plate; 15. second cylinder; 16. unloading plate; 17. baffle; 18. connecting block; 19. articulated cylinder; 20. placement groove; 21. rotating plate; 22. gear assembly; 23. driving motor; 24. block; 25. slot; 26. positioning block; 27. groove. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0033] In this application, the directions or positional relationships indicated by the terms "upper", "inner", "outer", "middle", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0034] like Figure 1 and Figure 2 As shown, a cooling molding device for a polyphenylene sulfide composite material includes an injection molding machine, the injection molding machine includes a frame 1, a mold clamping device and an injection device 2 are sequentially arranged on the frame 1, the mold clamping device includes a mold 3, a mold clamping mechanism 4 and a demolding mechanism 5, the mold clamping mechanism 4 and the demolding mechanism 5 are connected to the frame 1 through a bracket 6, the mold clamping mechanism 4 and the demolding mechanism 5 push the mold 3 to move in the bracket 6, a heat preservation cover 7 is arranged above the mold 3, and a first air seal is connected between the heat preservation cover 7 and the frame 1. Cylinder 9, a plurality of constant temperature tubes 10 are evenly arranged in the heat preservation cover 7, the constant temperature tubes 10 are bent in the heat preservation cover 7, the two ends of the constant temperature tubes 10 are respectively connected to the first large diameter tube 11 and the second large diameter tube 12, and the opposite ends of the first large diameter tube 11 and the second large diameter tube 12 are connected to the constant temperature water tank; a feed chute 13 is opened below the frame 1 corresponding to the mold 3, and a bottom heat preservation plate 14 is connected to the feed chute 13 so as to slide up and down, and the lower end of the bottom heat preservation plate 14 is connected to the second cylinder 15. First, the mold 3 is installed on the mold clamping device, and the mold clamping mechanism 4 and the demoulding mechanism 5 are firmly connected to the frame 1 through the bracket 6. Then the first cylinder 9 is started, driving the heat preservation cover 7 to cover the top of the mold 3. At the same time, the bottom heat preservation plate 14 is embedded in the placement groove 20 of the blanking plate 16, and then the injection device 2 is started to inject the polyphenylene sulfide composite material into the mold 3. The mold clamping mechanism 4 closes the mold 3 to maintain the shape of the product. During the injection process, the water cooling pipe of the mold 3 can maintain the temperature of the mold 3. The heat preservation cover 7 maintains the temperature of the mold 3 and its surroundings through the circulating water in the constant temperature pipe 10, ensuring the uniform cooling and molding of the composite material. It can maintain a uniform and stable temperature during the cooling process of the product, avoid the increase of internal stress and shape deformation caused by temperature differences, and ensure the high crystallinity and high performance of the molded product.

[0035] like Figure 3 and Figure 4As shown, the lower end of the feed chute 13 is connected with a feed plate 16, which is inclined, and baffles 17 are arranged on both sides of the feed plate 16. The second cylinder 15 is connected to the bottom insulation board 14 through a connecting block 18, and the bottom insulation board 14 is rotatably connected to the connecting block 18, and a hinged cylinder 19 is connected between the connecting block 18 and the bottom insulation board 14. The feed plate 16 is provided with a placement groove 20 corresponding to the bottom insulation board 14, and the bottom insulation board 14 can be embedded in the feed plate 16. The bottom insulation board 14 is rotatably connected with a rotating plate 21, and a gear assembly 22 is arranged at the bottom of the rotating plate 21. The lower end of the bottom insulation board 14 is connected with a driving motor 23, and the driving motor 23 drives the gear assembly 22 to rotate. The rotating plate 21 is connected with a stopper 24, and the bracket 6 is provided with a slot 25 corresponding to the stopper 24. When the composite material is cooled in the mold 3 and reaches a certain degree of solidification, the demoulding mechanism 5 pushes the mold 3 to open, and the molded product is ejected from the mold 3, and the molded product falls onto the bottom insulation plate 14. The bottom insulation plate 14 moves downward under the drive of the second cylinder 15, and the articulated cylinder 19 works at the same time to make the bottom insulation plate 14 rotate around the connecting block 18, so that the molded product is pushed from the discharge chute 13 to the inclined discharge plate 16. The driving motor 23 drives the gear assembly 22 at the lower end of the bottom insulation plate 14 to rotate, thereby driving the rotating plate 21 to rotate, and then the stopper 24 connected to the rotating plate 21 also rotates accordingly, releasing the limit on the molded product. The discharge plate 16 is inclined, and the molded product slides along the discharge plate 16, which improves the discharge efficiency and is collected under the guidance of the baffle 17, preventing the molded product from scattering during the sliding process, and also avoiding damage caused by impact during the falling process of the molded product, ensuring the integrity of the molded product, and improving the product quality.

[0036] like Figure 5 As shown, the water cooling pipe corresponding to the mold 3 on the frame 1 is provided with a positioning block 26, and the heat preservation cover 7 is provided with a groove 27 corresponding to the positioning block 26. The water cooling pipe of the mold 3 can maintain the temperature of the mold 3, can quickly cool down and thus shorten the production cycle, and ensure product quality. At the same time, the positioning block 26 ensures the stability of the water cooling pipe and the cooling effect. A sealing strip 8 is provided between the heat preservation cover 7 and the frame 1. Furthermore, the sealing strip 8 between the heat preservation cover 7 and the frame 1 ensures that heat will not be lost from the gap between the heat preservation cover 7 and the frame 1, reduces the influence of the external environment on the temperature of the mold 3, and ensures the temperature stability inside the mold 3.

[0037] The working process of the utility model is:

[0038] First, the mold 3 is installed on the mold clamping device, and it is ensured that the mold clamping mechanism 4 and the demoulding mechanism 5 are firmly connected to the frame 1 through the bracket 6, and then the first cylinder 9 is started to drive the heat preservation cover 7 to cover the top of the mold 3. At the same time, the bottom heat preservation plate 14 is embedded in the placement groove 20 of the blanking plate 16, and then the injection device 2 is started to inject the polyphenylene sulfide composite material into the mold 3. The mold clamping mechanism 4 closes the mold 3 to maintain the shape of the product. During the injection process, the water cooling pipe of the mold 3 can maintain the temperature of the mold 3, and then the circulating water in the constant temperature pipe 10 maintains the temperature of the mold 3 and its surroundings stable, ensuring the uniform cooling and molding of the composite material. When the composite material is cooled in the mold 3 and reaches a certain degree of solidification, The demoulding mechanism 5 pushes the mold 3 to open, and the molded product is ejected from the mold 3. The molded product falls onto the bottom insulation plate 14. The bottom insulation plate 14 moves downward under the drive of the second cylinder 15. At the same time, the articulated cylinder 19 works to rotate the bottom insulation plate 14 around the connecting block 18, thereby pushing the molded product from the discharge chute 13 to the inclined discharge plate 16. The driving motor 23 drives the gear assembly 22 at the lower end of the bottom insulation plate 14 to rotate, thereby driving the rotating plate 21 to rotate, and then the stopper 24 connected to the rotating plate 21 also rotates accordingly, releasing the limit on the molded product. The discharge plate 16 is inclined, and the molded product slides along the discharge plate 16 and is collected together under the guidance of the baffle 17.

Claims

1. A cooling molding device for a polyphenylene sulfide composite material, comprising an injection molding machine, the injection molding machine comprising a frame (1), a mold clamping device and an injection device (2) being arranged on the frame (1) in sequence, the mold clamping device comprising a mold (3), a mold clamping mechanism (4) and a mold stripping mechanism (5), the mold clamping mechanism (4) and the mold stripping mechanism (5) being connected to the frame (1) via a bracket (6), the mold clamping mechanism (4) and the mold stripping mechanism (5) pushing the mold (3) to move in the bracket (6), wherein: A heat preservation cover (7) is arranged above the mold (3), a first cylinder (9) is connected between the heat preservation cover (7) and the frame (1), a plurality of constant temperature tubes (10) are evenly arranged in the heat preservation cover (7), the constant temperature tubes (10) are bent in the heat preservation cover (7), two ends of the constant temperature tubes (10) are respectively connected to a first large diameter tube (11) and a second large diameter tube (12), and opposite ends of the first large diameter tube (11) and the second large diameter tube (12) are both connected to a constant temperature water tank; a material discharge chute (13) is provided below the frame (1) corresponding to the mold (3), a bottom heat preservation plate (14) is slidably connected in the material discharge chute (13), and a second cylinder (15) is connected to the lower end of the bottom heat preservation plate (14).

2. The cooling molding device of a polyphenylene sulfide composite material according to claim 1, characterized in that: The lower end of the material discharge chute (13) is connected to a material discharge plate (16), the material discharge plate (16) is arranged in an inclined manner, and baffles (17) are arranged on both sides of the material discharge plate (16).

3. The cooling molding device of a polyphenylene sulfide composite material according to claim 2, characterized in that: The second cylinder (15) is connected to the bottom insulation plate (14) via a connecting block (18); the bottom insulation plate (14) is rotatably connected to the connecting block (18); and an articulated cylinder (19) is connected between the connecting block (18) and the bottom insulation plate (14).

4. The cooling molding device of a polyphenylene sulfide composite material according to claim 3, characterized in that: The blanking plate (16) is provided with a placement groove (20) corresponding to the bottom insulation plate (14), and the bottom insulation plate (14) can be embedded in the blanking plate (16).

5. The cooling molding device of a polyphenylene sulfide composite material according to claim 1, characterized in that: The bottom heat-insulating plate (14) is rotatably connected to a rotating plate (21), a gear assembly (22) is arranged at the bottom of the rotating plate (21), a driving motor (23) is connected to the lower end of the bottom heat-insulating plate (14), the driving motor (23) drives the gear assembly (22) to rotate, a stopper (24) is connected to the rotating plate (21), and a slot (25) is provided on the bracket (6) corresponding to the stopper (24).

6. The cooling molding device of a polyphenylene sulfide composite material according to claim 1, characterized in that: A positioning block (26) is provided on the frame (1) corresponding to the water cooling pipe of the mold (3), and a groove (27) is provided on the heat-insulating cover (7) corresponding to the positioning block (26).

7. The cooling molding device of a polyphenylene sulfide composite material according to claim 1, characterized in that: A sealing strip (8) is provided between the heat-insulating cover (7) and the frame (1).

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