Degradable plastic injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a degradable plastic injection mold which comprises a workbench, an upper mold base is fixedly connected to one side of the top end of the workbench, a lower mold base is slidably connected to the upper surface of the workbench, a cooling mechanism is fixedly connected to the rear end face of the lower mold base, and the cooling mechanism comprises a cooling plate. A liquid storage cavity is formed in the cooling plate, a cooling pipe is fixedly connected to the top end of the cooling plate, a supporting rod is slidably connected to the middle of the cooling pipe, a connecting rod is fixedly connected to the bottom end of the supporting rod, sealing plates are fixedly connected to the top and the bottom of the connecting rod, sealing rings are fixedly connected to the outer sides of the sealing plates, and cooling fins are fixedly connected to the exterior of the cooling pipe. The rear end face of the cooling plate is fixedly connected with an air cooling mechanism, the air cooling mechanism comprises a supporting frame, cooling liquid is rapidly removed when cooling is not needed, the liquidity of molten plastic is guaranteed, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a degradable plastic injection mold. Background Art

[0002] Injection molds are a type of processing equipment used to manufacture various plastic products. They can inject plastic materials into the mold at high temperature and form finished products of the desired shape after cooling and solidification. Injection molds occupy an important position in the plastic product manufacturing industry due to their high efficiency, flexibility, and high manufacturing precision. With the improvement of environmental awareness and the popularization of the concept of sustainable development, biodegradable plastics, as an environmentally friendly material, are also gaining increasing attention for their injection mold technology.

[0003] The injection mold has a cavity inside that corresponds to the shape of the desired plastic product. The molten plastic is injected into the mold cavity and the plastic product is obtained after cooling and solidification. This process requires strict control of parameters such as injection pressure, injection speed, injection time, holding pressure, holding time and cooling time to ensure the quality and stability of the product.

[0004] In the injection molding process of biodegradable plastics, in order to accelerate the cooling and solidification of the molten plastic, a method of circulating cooling water in a heat sink is often used. However, this method has an inherent defect. Coolant will inevitably remain in the heat sink, causing the mold to cool prematurely and the temperature in the mold cavity to drop rapidly, which in turn significantly reduces the fluidity of the molten plastic, affecting the injection molding effect and product quality. To address the above problems, a biodegradable plastic injection mold is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a biodegradable plastic injection mold to solve the problem that coolant is easily left in the heat sink, which causes the mold to cool down prematurely, the temperature in the mold cavity to drop sharply, the fluidity of the molten plastic to decrease, and the injection molding effect and product quality to be affected.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The cooling device is installed in the cooling air filter press, and the cooling air filter press has an upper end and a lower end, and the lower end has a bottom end.

[0008] As a further optimized content of the present invention, the cooling tube corresponds to the liquid storage cavity, the cooling tube is located above the liquid storage cavity, and the inner wall of the cooling tube is connected with the inner wall of the liquid storage cavity from top to bottom.

[0009] As a further optimization of the present invention, the middle part of the top of the cooling plate is fixedly connected to an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected to a fixed plate, and the fixed plate is fixedly connected to the support rod.

[0010] As a further optimization of the present invention, a water filling groove is provided on the surface of one of the sealing plates at the top, a sealing cover is threadedly connected to the top of the cooling tube, the sealing cover is slidably connected to the support rod, and a fluid infusion tube is fixedly connected to the top of the sealing cover.

[0011] As a further optimization of the present invention, a mounting platform is fixedly connected to the other side of the top of the workbench, a guide rod is fixedly connected between the mounting platform and the upper mold base, and the lower mold base and the cooling plate are simultaneously slidably connected on the outer side of the lower mold base.

[0012] As a further optimization of the present invention, an electric cylinder is fixedly connected to the middle of the mounting platform, the telescopic end of the electric cylinder is fixedly connected to the middle of the rear end surface of the cooling plate, and an injection pipe is connected through the middle of the upper mold base.

[0013] As a further optimization of the present invention, one side of the cooling plate is fixedly connected to a measuring rod, one side of the upper mold base is fixedly connected to a measuring base, the measuring rod and the measuring base are slidingly connected, the middle part of the measuring base is fixedly connected to a travel switch through a mounting groove, the electric cylinder is electrically connected to the power supply through the travel switch, the surface of the measuring rod is fixedly connected to a time controller, and the electric telescopic rod is electrically connected to the power supply through the time controller.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. The cooling mechanism can flexibly control the position of the coolant. When cooling is not required, the coolant can be quickly removed from the cooling plate. This design effectively ensures the fluidity of the molten plastic during the injection molding process and improves the quality of the product. At the same time, in the non-cooling stage, the coolant is quickly cooled down by the combined action of the air cooling device and the heat sink, ensuring that it is in the best condition at any time for the next use.

[0016] 2. Through the coordinated use of the electric cylinder and the travel switch, the moving position of the lower die base is precisely controlled, which not only ensures the accuracy of mold closing, but also effectively protects the electric cylinder and mold from damage caused by excessive movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 It is a side structural diagram of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the cooling plate of the utility model;

[0020] Figure 4 This is a schematic cross-sectional view of the cooling mechanism of the present invention;

[0021] Figure 5 This is a schematic cross-sectional view of the air cooling mechanism of the present invention.

[0022] In the figure: 1. Workbench; 2. Upper die base; 3. Lower die base; 4. Cooling mechanism; 41. Cooling plate; 411. Measuring rod; 412. Measuring base; 413. Travel switch; 414. Time controller; 42. Liquid storage chamber; 43. Cooling pipe; 44. Support rod; 45. Connecting rod; 46. Sealing plate; 47. Heat sink; 49. Air cooling mechanism; 491. Support frame; 492. Support plate; 493. Fan blade; 5. Mounting table; 6. Guide rod; 7. Fixing plate. DETAILED DESCRIPTION

[0023] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] See also Figure 1-5 , the utility model provides a technical solution:

[0026] A biodegradable plastic injection mold, comprising a workbench 1, one side of the top of the workbench 1 is fixedly connected to an upper mold base 2, the upper surface of the workbench 1 is slidably connected to a lower mold base 3, the rear end surface of the lower mold base 3 is fixedly connected to a cooling mechanism 4, the cooling mechanism 4 comprises a cooling plate 41, a liquid storage cavity 42 is opened inside the cooling plate 41, the top of the cooling plate 41 is fixedly connected to a cooling pipe 43, the cooling pipe 43 corresponds to the liquid storage cavity 42, the cooling pipe 43 is located above the liquid storage cavity 42, the inner wall of the cooling pipe 43 is vertically connected to the inner wall of the liquid storage cavity 42, the middle part of the cooling pipe 43 is slidably connected to a support rod 44, the middle part of the top of the cooling plate 41 is fixedly connected to an electric telescopic rod, the telescopic end of the electric telescopic rod is fixedly connected to a fixed plate 7, the fixed plate 7 is connected to the The support rod 44 is fixedly connected, and the bottom end of the support rod 44 is fixedly connected to the connecting rod 45. The top and bottom of the connecting rod 45 are fixedly connected to the sealing plate 46. The outer side of the sealing plate 46 is fixedly connected to the sealing ring. The sealing ring ensures the sealing of the sealing plate 46 and the liquid storage chamber 42. The outside of the cooling tube 43 is fixedly connected to the heat sink 47. The rear end face of the cooling plate 41 is fixedly connected to the air cooling mechanism 49. The air cooling mechanism 49 includes a support frame 491. The middle part of the support frame 491 is fixedly connected to the support plate 492. The back side of the support plate 492 is fixedly connected to the servo motor through the motor seat. The drive shaft of the servo motor is fixedly connected to the fan blade 493. The fan blade 493 corresponds to the heat sink 47. This arrangement improves the heat dissipation efficiency of the coolant.

[0027] As a further implementation of this solution, a water filling groove is provided on the surface of one of the top sealing plates 46, through which coolant can be poured between the two sealing plates 46. A sealing cover is threadedly connected to the top of the cooling tube 43, and the sealing cover is slidably connected to the support rod 44. A liquid filling tube is fixedly connected to the top of the sealing cover, through which coolant can be added to the cooling tube 43.

[0028] As a further implementation of this solution, a mounting platform 5 is fixedly connected to the other side of the top of the workbench 1, a guide rod 6 is fixedly connected between the mounting platform 5 and the upper mold base 2, the lower mold base 3 and the cooling plate 41 are simultaneously slidably connected on the outside of the lower mold base 3, an electric cylinder is fixedly connected to the middle of the mounting platform 5, the telescopic end of the electric cylinder is fixedly connected to the middle of the rear end surface of the cooling plate 41, and an injection pipe is connected through the middle of the upper mold base 2. This arrangement can deliver melted plastic particles to the inner side of the upper mold base 2;

[0029] As a further implementation scheme of this scheme, a measuring rod 411 is fixedly connected to one side of the cooling plate 41, and a measuring seat 412 is fixedly connected to one side of the upper mold base 2. The measuring rod 411 and the measuring seat 412 are slidingly connected. The middle part of the measuring seat 412 is fixedly connected to a limit switch 413 through a mounting groove. The electric cylinder is electrically connected to the power supply through the limit switch 413. The surface of the measuring rod 411 is fixedly connected to a time controller 414. The electric telescopic rod is electrically connected to the power supply through the time controller 414. This setting can be precisely controlled.

[0030] Working process: Before the injection molding operation, one end of the injection tube is connected to the external feed pipe to feed the melted plastic particles into the inner side of the upper mold base 2. Before that, the telescopic end of the electric cylinder drives the lower mold base 3 to move toward the upper mold base 2 through the cooling plate 41. The movement of the lower mold base 3 drives the measuring rod 411 to move synchronously. When the measuring rod 411 moves to the predetermined position, the travel switch 413 is used to close the electric cylinder, so as to achieve precise control of the moving position of the lower mold base 3, which has a good protection effect on the electric cylinder and the lower mold base 3. In order to cool the melted plastic, the telescopic end of the electric telescopic rod drives the support rod 44 and the cooling tube 43 downward through the fixed plate 7. As the cooling tube 43 moves, the coolant between the two sealing plates 46 moves downward into the liquid storage chamber 42 to absorb the heat emitted by the cooling plate 41 and the lower mold base 3. The time controller 414 records the downward movement time of the telescopic end of the electric telescopic rod in real time. When the set time is reached, the telescopic end of the electric telescopic rod is controlled to move upward, so that the coolant quickly leaves the liquid storage chamber 42 and moves into the cooling tube 43.

[0031] In order to quickly cool the coolant and facilitate its next use, the heat sink 47 is used to increase the contact area between the outside of the cooling tube 43 and the air, thereby improving the heat dissipation efficiency. The airflow generated by the rotation of the fan blades 493 driven by the drive shaft of the servo motor can accelerate the cooling of the coolant and the heat sink 47, ensuring that they are in the best condition at any time for the next use.

[0032] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A biodegradable plastic injection mold, comprising a workbench (1), characterized in that: An upper die base (2) is fixedly connected to one side of the top of the workbench (1), a lower die base (3) is slidably connected to the upper surface of the workbench (1), and a cooling mechanism (4) is fixedly connected to the rear end surface of the lower die base (3); The cooling mechanism (4) includes a cooling plate (41), a liquid storage cavity (42) is provided inside the cooling plate (41), a cooling tube (43) is fixedly connected to the top of the cooling plate (41), a support rod (44) is slidably connected to the middle of the cooling tube (43), a connecting rod (45) is fixedly connected to the bottom of the support rod (44), a sealing plate (46) is fixedly connected to the top and bottom of the connecting rod (45), a sealing ring is fixedly connected to the outside of the sealing plate (46), a heat sink (47) is fixedly connected to the outside of the cooling tube (43), and an air cooling mechanism (49) is fixedly connected to the rear end face of the cooling plate (41); The air cooling mechanism (49) comprises a support frame (491), a support plate (492) is fixedly connected to the middle of the support frame (491), a servo motor is fixedly connected to the back of the support plate (492) via a motor seat, a fan blade (493) is fixedly connected to the transmission shaft of the servo motor, and the fan blade (493) corresponds to the heat sink (47).

2. A biodegradable plastic injection mold according to claim 1, characterized in that: The cooling tube (43) corresponds to the liquid storage cavity (42), the cooling tube (43) is located above the liquid storage cavity (42), and the inner wall of the cooling tube (43) and the inner wall of the liquid storage cavity (42) are vertically connected.

3. The biodegradable plastic injection mold according to claim 1, characterized in that: An electric telescopic rod is fixedly connected to the middle of the top of the cooling plate (41), and a fixed plate (7) is fixedly connected to the telescopic end of the electric telescopic rod, and the fixed plate (7) is fixedly connected to the support rod (44).

4. The biodegradable plastic injection mold according to claim 1, characterized in that: A water filling groove is provided on the surface of one of the sealing plates (46) at the top, a sealing cover is threadedly connected to the top of the cooling tube (43), the sealing cover is slidably connected to the support rod (44), and a liquid infusion tube is fixedly connected to the top of the sealing cover.

5. The biodegradable plastic injection mold according to claim 3, characterized in that: The other side of the top of the workbench (1) is fixedly connected to a mounting platform (5), a guide rod (6) is fixedly connected between the mounting platform (5) and the upper die base (2), and the lower die base (3) and the cooling plate (41) are simultaneously slidably connected on the outer side of the lower die base (3).

6. The biodegradable plastic injection mold according to claim 5, characterized in that: An electric cylinder is fixedly connected to the middle of the mounting platform (5), a telescopic end of the electric cylinder is fixedly connected to the middle of the rear end surface of the cooling plate (41), and a liquid injection pipe is connected through the middle of the upper mold base (2).

7. The biodegradable plastic injection mold according to claim 6, characterized in that: A measuring rod (411) is fixedly connected to one side of the cooling plate (41), a measuring seat (412) is fixedly connected to one side of the upper mold base (2), the measuring rod (411) and the measuring seat (412) are slidably connected, a travel switch (413) is fixedly connected to the middle of the measuring seat (412) through a mounting groove, the electric cylinder is electrically connected to the power supply through the travel switch (413), a time controller (414) is fixedly connected to the surface of the measuring rod (411), and the electric telescopic rod is electrically connected to the power supply through the time controller (414).

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