Injection molding cooling device

Abstract

The injection molding cooling device comprises a base, the top of the base is connected with a supporting frame, the top of the supporting frame is provided with an electric telescopic rod, the end of the electric telescopic rod is connected with a mounting plate, the bottom of the mounting plate is connected with a movable mold, and the top of the base is connected with a fixed mold corresponding to the movable mold. According to the injection molding cooling device, the water supply time of the cooling tank is accurately controlled, and the stability of the mold temperature in the injection molding process is ensured, so that the precision and quality of injection molding are ensured, the rejection rate caused by temperature fluctuation is reduced, and the production efficiency and economic benefits are improved.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding cooling equipment, in particular to an injection molding cooling device. Background Art

[0002] Injection molding is a widely used manufacturing process, mainly used for mass production of plastic parts. The process is completed by an injection molding machine. Its working principle is to feed granular or powdered plastic raw materials from a hopper into the heating barrel of the injection molding machine. Under the action of heat and pressure, the plastic melts into a molten state. Subsequently, the molten plastic is injected into the mold cavity at high pressure through the screw or plunger of the injection molding machine. The mold is the core component of injection molding. Its design and manufacturing accuracy directly affect the quality of the final product. The mold is usually composed of a movable mold and a fixed mold. During the injection molding process, the movable mold and the fixed mold are closed to form a cavity. After the molten plastic fills the cavity, it is cooled and solidified to finally form the desired plastic product.

[0003] During the injection molding process, the plastic melt will transfer a large amount of heat to the mold during the injection process. However, when the injection mold works for a long time, the heat will continue to accumulate on the injection mold, which will affect the continued processing and use of the mold. It needs to be cooled. Excessive mold temperature will cause the cooling time of the plastic product to be prolonged, affecting production efficiency. At the same time, it will also cause the surface quality of the product to deteriorate, resulting in defects such as shrinkage, warping, and deformation, which will seriously affect the appearance and performance of the product.

[0004] However, during the cooling process of the mold, if the mold is cooled while injection molding is in progress, it is easy to affect the temperature stability of the product during the mold closing and injection molding process, because the rapid change of mold temperature will cause the flow state of the plastic melt in the cavity to change, thereby affecting the molding quality of the product, such as weld lines, silver streaks, inconsistent surface roughness and other problems. Therefore, most of the existing cooling structures are to shut down and cool the injection mold after a certain amount of heat has accumulated. Although this cooling method can effectively reduce the mold temperature, it will cause production interruptions, affect production progress, and reduce equipment utilization and production efficiency.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original injection molding cooling device. Summary of the invention

[0006] The technical solution of the present invention aims at the technical problem that the existing technical solution is too single, and provides an injection molding cooling device which is significantly different from the existing technical solution to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an injection molding cooling device, comprising a base, a support frame is connected to the top of the base, and an electric telescopic rod is installed on the top of the support frame, and a mounting plate is connected to the end of the electric telescopic rod, a movable mold is connected to the bottom of the mounting plate, and a fixed mold corresponding to the movable mold is connected to the top of the base, and cooling grooves are provided in the movable mold and the fixed mold, a supply structure for conveying cold water for cooling is installed on one side of the top of the base, and a reflux structure is provided on the other side of the base.

[0008] Preferably, the cooling groove is arranged in a curved shape in the movable mold or the fixed mold.

[0009] Preferably, the supply structure includes a water inlet trough, a water inlet hose, a box body, a frame body, a connecting shaft, a full gear, a rack plate, a baffle plate, a delivery pipe, a water tank, and a heat sink. A water inlet trough connected to one end of the cooling trough is respectively opened on one side of the base and the mounting plate, and a water inlet hose is connected between the water inlets, and the water inlet hose is connected to the box body. The box body is installed on the frame body, and the frame body is connected to the top of the base, and a connecting shaft is connected to the frame body, and the connecting shaft is located on the inner and outer walls of the frame body and is connected to a full gear. The mounting plate is connected to a rack plate for matching the full gear on one side close to the frame body, the end of the connecting shaft passes through the interior of the box body and is connected to a baffle plate, and the box body is connected to a delivery pipe, the end of the delivery pipe is connected to a water tank, and the water tank is connected to a heat sink, and the water tank and the heat sink are installed on the top of the support frame.

[0010] Preferably, a tooth block for meshing with the full gear is provided in a partial area of ​​the lower end of the rack plate, and a tooth block for engaging and limiting the full gear is only provided in an upper area of ​​the rack plate.

[0011] Preferably, the reflux structure includes a vertical rod, a piston plate, a groove body, a through port, a sealing plate, a limiting rod, a limiting groove, a reflux pipe, a water outlet hose, and a water outlet groove. A groove body is provided in the base on the side away from the supply structure, and a piston plate is connected to the groove body, and a vertical rod connected to the mounting plate is provided on the piston plate. A through port is provided on the piston plate that passes through its upper and lower end surfaces, and a sealing plate is connected to the bottom of each through port, and a number of limiting rods are connected to each sealing plate, each of the limiting rods is located in the corresponding limiting groove, and the limiting groove is provided at the bottom of the piston plate near the side of the through port, the groove body is connected to a reflux pipe, and the end of the reflux pipe is connected to the heat sink, and a water outlet groove connected to the other end of the cooling groove is provided on the other side of the base and the mounting plate, and the end of the water outlet groove is connected to the groove body, and a water outlet hose is connected between the water outlet grooves.

[0012] Preferably, the end of the return pipe is connected to an area close to the bottom of the tank body, and the water outlet trough is connected to a top area of ​​the tank body.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: during the mold closing injection molding process, the injection molding cooling device stops supplying water to the cooling groove opened in the mold, thereby avoiding the influence of water flow cooling on the temperature balance of the mold during injection molding. This design can effectively prevent the change of the flow state of the plastic melt in the mold cavity caused by the rapid change of the mold temperature, thereby avoiding the occurrence of welding lines, silver streaks, inconsistent surface roughness and other molding quality problems in the products, and significantly improving the appearance quality and performance of the products; by accurately controlling the water supply timing of the cooling groove, the stability of the mold temperature during the injection molding process is ensured, thereby ensuring the accuracy and quality of injection molding, reducing the scrap rate caused by temperature fluctuations, and improving production efficiency and economic benefits.

[0014] When the mold is opened after the mold is closed, the device can supply water to the cooling groove in the mold in time, and quickly take away the heat in the mold through the flow of water, effectively avoiding the accumulation of excessive mold temperature. This cooling method can reduce the mold temperature in a short time, shorten the cooling time of plastic products, improve production efficiency, and reduce the surface shrinkage, warping, deformation and other defects of the product caused by excessive mold temperature, further improving the overall quality of the product. Through the curved design of the cooling groove and the circulation of cooling water, the uniformity and consistency of the cooling effect are ensured, avoiding local overheating or overcooling, further optimizing the temperature distribution of the mold, and improving the stability of injection molding.

[0015] During the mold closing process, no additional cooling equipment or complicated operating procedures are required. The liquid in the cooling groove in the mold can be sucked out under negative pressure through the cooperation of the piston plate and the groove body inside the device. The cooperation between the piston plate and the groove body can effectively avoid residual liquid in the cooling groove, and prevent the residual liquid from causing adverse effects on product quality during injection molding after mold closing. This structural optimization not only improves the cooling efficiency, but also reduces injection defects caused by residual liquid in the cooling groove, further improving the product qualification rate.

[0016] Compared with the traditional shutdown cooling method, this device can flexibly control the cooling process during the injection molding process, avoiding production interruptions caused by shutdown cooling. This continuous production mode significantly improves equipment utilization and production efficiency, reduces equipment idle time, reduces production costs, and improves the economic benefits of the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the front cross-sectional structure of the present invention in the mold clamping state; Figure 2 This is a schematic diagram of the front cross-sectional structure of the present invention in the mold opening state; Figure 3 For the present invention Figure 2 The enlarged structural diagram at A in the middle; Figure 4It is a schematic diagram of the side structure of the box body of the present invention; Figure 5 It is a schematic diagram of the front cross-sectional structure of the box body of the present invention; Figure 6 It is a schematic diagram of the front view structure of the mold clamping state of the present invention.

[0018] In the figure: 1. base; 2. support frame; 3. electric telescopic rod; 4. mounting plate; 5. movable mold; 6. fixed mold; 7. cooling trough; 8. supply structure; 801. water inlet trough; 802. water inlet hose; 803. box body; 804. frame body; 805. connecting shaft; 806. full gear; 807. rack plate; 808. baffle plate; 809. delivery pipe; 810. water tank; 811. heat sink; 9. reflux structure; 901. vertical rod; 902. piston plate; 903. trough body; 904. through port; 905. sealing plate; 906. limit rod; 907. limit trough; 908. reflux pipe; 909. water outlet hose; 910. water outlet trough. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-6 The present invention provides a technical solution: an injection molding cooling device, including a base 1, a support frame 2, an electric telescopic rod 3, a mounting plate 4, a movable mold 5, a fixed mold 6, a cooling tank 7, a supply structure 8, a water inlet tank 801, a water inlet hose 802, a box body 803, a frame body 804, a connecting shaft 805, a full gear 806, a rack plate 807, a baffle plate 808, a delivery pipe 809, a water tank 810, a heat dissipation box 811, a reflux structure 9, a vertical rod 901, a piston plate 902, a tank body 903, a through port 904, a sealing plate 905, a limit Rod 906, limiting groove 907, reflux pipe 908, water outlet hose 909, water outlet groove 910, the top of the base 1 is connected to the support frame 2, and the top of the support frame 2 is installed with an electric telescopic rod 3, and the end of the electric telescopic rod 3 is connected to the mounting plate 4, the bottom of the mounting plate 4 is connected to the movable mold 5, and the top of the base 1 is connected to the fixed mold 6 corresponding to the movable mold 5, and cooling grooves 7 are provided in the movable mold 5 and the fixed mold 6, a supply structure 8 for conveying cold water for cooling is installed on one side of the top of the base 1, and a reflux structure 9 is provided on the other side of the base 1.

[0021] The cooling groove 7 is provided in a curved shape in the movable mold 5 or the fixed mold 6 .

[0022] The supply structure 8 includes a water inlet trough 801, a water inlet hose 802, a box 803, a frame 804, a connecting shaft 805, a full gear 806, a rack plate 807, a baffle plate 808, a delivery pipe 809, a water tank 810, and a heat dissipation box 811. The base 1 and the mounting plate 4 are each provided with a water inlet trough 801 connected to one end of the cooling trough 7, and a water inlet hose 802 is connected between the water inlet troughs 801, and the water inlet hose 802 is connected to the box 803. The box 803 is installed on the frame 804, and the frame 804 is connected to the top of the base 1. A connecting shaft 805 is connected to the frame 804, and the connecting shaft 805 is located on the inner and outer walls of the frame 804 and is connected to a full gear 806. A rack plate 807 for matching the full gear 806 is connected to the side of the mounting plate 4 close to the frame 804. The end of the connecting shaft 805 passes through the interior of the box 803 and is connected to a baffle plate 808. The box 803 is connected to a delivery pipe 809, and the end of the delivery pipe 809 is connected to a water tank 810, and the water tank 810 is connected to a heat sink 811, and the water tank 810 and the heat sink 811 are installed on the top of the support frame 2.

[0023] A tooth block for meshing with the full gear 806 is provided in a partial area of ​​the lower end of the rack plate 807 , and a tooth block for engaging and limiting the full gear 806 is only provided in an upper area of ​​the rack plate 807 .

[0024] The reflux structure 9 includes a vertical rod 901, a piston plate 902, a groove body 903, a through-port 904, a sealing plate 905, a limiting rod 906, a limiting groove 907, a reflux pipe 908, a water outlet hose 909, and a water outlet groove 910. The base 1 is provided with a groove body 903 on the side away from the supply structure 8, and the groove body 903 is connected with a piston plate 902. The piston plate 902 is provided with a vertical rod 901 connected to the mounting plate 4. The piston plate 902 is provided with a through-port 904 penetrating the upper and lower end surfaces thereof, and each through-port 904 is connected to a sealing plate 9 at the bottom. 05, and each sealing plate 905 is connected to a plurality of limiting rods 906, each limiting rod 906 is located in a corresponding limiting groove 907, and the limiting groove 907 is provided at the bottom of the piston plate 902 near the side of the through opening 904, the groove body 903 is connected to a return pipe 908, and the end of the return pipe 908 is connected to the heat sink 811, and a water outlet groove 910 connected to the other end of the cooling groove 7 is provided on the other side of the base 1 and the mounting plate 4, and the end of the water outlet groove 910 is connected to the groove body 903, and a water outlet hose 909 is connected between the water outlet grooves 910.

[0025] The end of the return pipe 908 is connected to the bottom area of ​​the tank body 903 , and the water outlet trough 910 is connected to the top area of ​​the tank body 903 .

[0026] Working principle: According to Figure 1As shown, first, during the injection molding operation, the electric telescopic rod 3 pushes the mounting plate 4 to move downward, so that the movable mold 5 and the fixed mold 6 are molded together for injection molding. During this process, the mounting plate 4 drives the rack plate 807 to move downward, and the rack plate 807 contacts the full gear 806 and meshes with it, driving the full gear 806 and the connecting shaft 805 to rotate a certain angle, and the connecting shaft 805 drives the baffle plate 808 to rotate a certain angle in the box body 803 at the same time, so that the baffle plate 808 is in a horizontal state in the box body 803 for blocking, preventing water from continuing to pass through the box body 803, the water inlet hose 802 and the water inlet groove 801 into the cooling groove 7, so as to avoid affecting the injection molding quality after the mold is closed; At the same time, the downward movement of the mounting plate 4 pushes the piston plate 902 to move downward in the groove body 903 through the vertical rod 901. The piston plate 902 moves downward in the groove body 903, and the sealing plate 905 fits the opening 904 to seal it, so that negative pressure is generated between the top of the piston plate 902 and the top of the groove body 903. The water in the cooling groove 7 is pumped into the groove body 903 and above the piston plate 902 through the water outlet groove 910 and the water outlet hose 909, so as to avoid water in the cooling groove 7 and affect the quality of the injection molded product after the movable mold 5 and the fixed mold 6 are molded together. In addition, the piston plate 902 moves downward in the groove body 903, squeezing the water in the groove body 903 into the return pipe 908, and the water is initially cooled by the zigzag return pipe 908, and then enters the heat sink 811 for deep cooling. After the injection molding is completed, the electric telescopic rod 3 drives the mounting plate 4 to move upward, so that the movable mold 5 and the fixed mold 6 are opened, and the mounting plate 4 drives the full gear 806 to reverse through the rack plate 807, so that the baffle plate 808 is reset in the box body 803 to a vertical state, and water enters the cooling tank 7 to cool the mold; At the same time, the mounting plate 4 drives the piston plate 902 to move up and reset in the groove body 903 through the vertical rod 901, and the sealing plate 905 is separated from the fitting with the through-port 904. The water at the top of the groove body 903 and the top of the piston plate 902 passes through the through-port 904 and enters between the bottom of the groove body 903 and the bottom of the piston plate 902, and so on. This is the working principle of the injection molding cooling device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding cooling device, comprising a base (1), characterized in that: The top of the base (1) is connected to a support frame (2), and an electric telescopic rod (3) is installed on the top of the support frame (2), and the end of the electric telescopic rod (3) is connected to a mounting plate (4), the bottom of the mounting plate (4) is connected to a movable mold (5), and the top of the base (1) is connected to a fixed mold (6) corresponding to the movable mold (5), and cooling grooves (7) are provided in the movable mold (5) and the fixed mold (6), and a supply structure (8) is installed on one side of the top of the base (1), and the supply structure (8) is connected to the cooling groove (7) through a water inlet groove (801) and a water inlet hose (802), and is used to transport cold water to the cooling groove (7) for cooling, and a reflux structure (9) is provided on the other side of the base (1).

2. An injection molding cooling device according to claim 1, characterized in that: The cooling groove (7) is arranged in a curved shape inside the movable mold (5) or the fixed mold (6).

3. The injection molding cooling device according to claim 1, characterized in that: The supply structure (8) comprises a water inlet trough (801), a water inlet hose (802), a box (803), a frame (804), a connecting shaft (805), a full gear (806), a rack plate (807), a baffle plate (808), a delivery pipe (809), a water tank (810), and a heat dissipation box (811). The base (1) and the mounting plate (4) are each provided with a water inlet trough (801) connected to one end of the cooling trough (7), and a water inlet hose (802) is connected between the water inlet troughs (801), and the water inlet hose (802) is connected to the box (803). The frame (804) is connected to the top of the base (1) by bolts, and the box (803) is installed on the frame by bolts. (804), and the frame (804) is connected to a connecting shaft (805), and the connecting shaft (805) is located on the inner and outer walls of the frame (804) and is connected to a full gear (806), the mounting plate (4) is connected to a rack plate (807) for matching the full gear (806) on the side close to the frame (804), the end of the connecting shaft (805) passes through the interior of the box (803) and is connected to a baffle plate (808), and the box (803) is connected to a delivery pipe (809), the end of the delivery pipe (809) is connected to a water tank (810), and the water tank (810) is connected to a heat sink (811), and the water tank (810) and the heat sink (811) are installed on the top of the support frame (2).

4. An injection molding cooling device according to claim 3, characterized in that: The lower end region of the rack plate (807) is provided with a tooth block for meshing with the full gear (806), and the upper end region of the rack plate (807) is only provided with a tooth block for engaging and limiting the full gear (806).

5. The injection molding cooling device according to claim 3, characterized in that: The reflux structure (9) comprises a vertical rod (901), a piston plate (902), a groove body (903), a through-port (904), a sealing plate (905), a limiting rod (906), a limiting groove (907), a reflux pipe (908), a water outlet hose (909), and a water outlet groove (910). The base (1) is provided with a groove body (903) on a side away from the supply structure (8), and the groove body (903) is connected with a piston plate (902). The piston plate (902) is provided with a vertical rod (901) connected to the mounting plate (4). The piston plate (902) is provided with a through-port (904) penetrating the upper and lower end surfaces thereof, and each through-port (904) is connected with a sealing member at the bottom. The piston plate (905) is provided with a plurality of limit rods (906) connected to each sealing plate (905), each limit rod (906) is located in a corresponding limit groove (907), and the limit groove (907) is provided at the bottom of the piston plate (902) near the side of the through opening (904), the groove body (903) is connected with a return pipe (908), and the end of the return pipe (908) is connected to the heat dissipation box (811), and the other side of the base (1) and the mounting plate (4) is provided with a water outlet groove (910) connected to the other end of the cooling groove (7), and the end of the water outlet groove (910) is connected to the groove body (903), and a water outlet hose (909) is connected between the water outlet grooves (910).

6. An injection molding cooling device according to claim 5, characterized in that: The end of the return pipe (908) is connected to a region close to the bottom of the tank body (903), and the water outlet trough (910) is connected to a top region of the tank body (903).

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