Injection mold convenient to exhaust

Abstract

The utility model discloses an injection mold convenient to exhaust, which relates to the technical field of injection molds and comprises a lower mold, an upper mold is attached to the top of the lower mold, an exhaust hole is fixedly arranged in the upper mold, and a steel needle is slidably arranged in the exhaust hole through a lifting component. And a heating assembly is arranged in the upper mold. Through the installation of the heating assembly, when the exhaust hole is blocked by a rubber foreign matter, the spring heating ring is heated through an external controller, and the heating temperature of the spring heating ring is controlled, so that the circular heating cavity and the exhaust hole are directly heated, the rubber foreign matter is softened and expanded, and then a steel needle is inserted into the exhaust hole to eject the rubber foreign matter out; the heating process is fast, the temperature can be precisely controlled, and the problems that in the prior art, when the exhaust hole of the injection mold is dredged through a heating method, the heating time of the mold is long, and the mold is burnt out due to the fact that the temperature is not well controlled are solved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to an injection mold that facilitates venting. Background Technology

[0002] Injection molding is a method of shaping industrial products using injection molds. The advantages of injection molds are fast production speed, high efficiency, automated operation, a wide variety of colors and shapes, shapes ranging from simple to complex, sizes ranging from large to small, precise product dimensions, easy product updates and replacements, and the ability to produce complex shapes. It is suitable for mass production and molding of complex products. Injection molds usually have venting holes to allow excess air to escape from the mold during the injection process, ensuring the airtightness of the product.

[0003] Due to the diversity of raw materials, processes, equipment, and the varying skill levels of operators during the production process, the venting points of injection molds can become clogged with dust or rubber foreign objects, leading to problems such as air holes and defects in the product. This not only affects product quality but also wastes production time and costs and may even damage the mold. Therefore, how to solve the problem of clogged venting points in injection molds is a matter that every mold company needs to pay attention to.

[0004] Existing technologies typically use heating to clear vent holes. This involves heating the mold to a certain temperature to soften and expand the rubber foreign object, then inserting a steel needle into the vent hole to push it out, thus achieving the removal effect. However, this method requires heating the entire mold, which results in a long heating time and makes temperature control difficult. Excessive temperature can burn out the mold. Therefore, we propose an injection mold that facilitates venting to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of the present invention, to avoid obscuring the purpose of these documents, and such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0006] Therefore, the purpose of this utility model is to provide an injection mold that facilitates venting, which can solve the problem that when the venting hole of the injection mold is cleared by heating, the mold heating time is long and the temperature is difficult to control, which may burn the mold.

[0007] To solve the above-mentioned technical problems, this utility model provides an injection mold with convenient venting, adopting the following technical solution: it includes a base plate, a lower mold is fixedly disposed on the top of the base plate, an upper mold is attached to the top of the lower mold, an injection cavity is fixedly disposed inside the lower mold, an injection tube is fixedly disposed in the middle of the top of the upper mold, an vent is fixedly disposed inside the upper mold, the vent penetrates both the upper and lower surfaces of the upper mold, a steel needle is slidably disposed inside the vent through a lifting component, and a heating component is disposed inside the upper mold;

[0008] The heating assembly includes a circular heating cavity, which is fixedly installed inside the upper mold. The vertical center lines of the circular heating cavity and the exhaust hole are on the same straight line. A spring heating coil is installed inside the circular heating cavity. Both ends of the spring heating coil are electrically connected to wires, which are electrically connected to an external controller.

[0009] Preferably, there are two vent holes, which are symmetrically arranged about the center line of the upper mold.

[0010] Preferably, the inner wall of the circular heating cavity is fixedly provided with a heat insulation layer.

[0011] Preferably, the lifting assembly includes a lifting plate, which is fixedly mounted on the upper end of the steel needle. A motor is fixedly mounted on the top of the upper mold, and a threaded tube is fixedly connected to the drive end of the motor. A threaded hole is opened inside the lifting plate, and the threaded hole and the threaded tube cooperate with each other.

[0012] Preferably, the top of the exhaust port is provided with an air outlet cylinder fixedly connected to the upper mold. The air outlet cylinder has a vertical through hole and a horizontal through hole fixedly opened inside. The vertical through hole and the horizontal through hole are arranged perpendicular to each other and are interconnected. The vertical center lines of the vertical through hole and the exhaust port are on the same straight line, and the inner diameters of the vertical through hole and the exhaust port are the same.

[0013] Preferably, a cooling cavity is fixedly provided inside the lower mold, and a number of evenly distributed heat dissipation columns are fixedly connected between the upper and lower inner walls of the cooling cavity. Water pipes are fixedly connected to both ends of the lower mold, and the water pipes and the cooling cavity are interconnected.

[0014] Preferably, the top of the base plate is fixedly provided with two symmetrically arranged guide rods, the end of the upper mold is fixedly provided with a connecting plate, the inside of the connecting plate is fixedly provided with guide holes, the guide holes are adapted to the guide rods, the top of the lower mold is fixedly provided with two limiting grooves symmetrically arranged about the center line of the lower mold, and the bottom of the upper mold is fixedly provided with a positioning block, the positioning block is adapted to the limiting grooves.

[0015] In summary, this utility model has at least one of the following beneficial effects:

[0016] 1. By installing the heating component, when the vent hole is blocked by rubber foreign objects, the external controller heats the spring heating coil and controls the heating temperature of the spring heating coil, thereby directly heating the circular heating chamber and the vent hole, softening and expanding the rubber foreign objects. Then, a steel needle is inserted into the vent hole to push out the rubber foreign objects, thereby achieving the cleaning effect. This heating process is fast and the temperature can be precisely controlled, solving the problem that when using the existing technology to unclog the vent hole of the injection mold by heating, the mold heating time is long and the temperature is difficult to control, which may burn the mold.

[0017] 2. By installing the lifting assembly, when the vent is blocked by accumulated dust, the motor is started, which drives the threaded tube to rotate, thereby driving the lifting plate and steel needle to move downward synchronously. This allows the steel needle to push out the accumulated dust inside the vent, clearing the vent and allowing excess air in the injection cavity to be discharged during the product injection process, ensuring the airtightness of the product.

[0018] 3. After injection molding is completed, cooling water flows between the cooling chamber and the two water pipes to remove the heat from the lower mold and accelerate product molding. The multiple heat dissipation columns increase the contact area between the cooling chamber and the cooling water, allowing the heat from the lower mold to be removed more quickly. The multiple heat dissipation columns also block the water flow, ensuring that the cooling water flows evenly inside the cooling chamber, thereby cooling the product evenly and improving product quality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall cross-sectional structure of an injection mold for convenient venting according to the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the heating component and lifting component of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal structure of the circular heating cavity of this utility model;

[0023] Figure 4 This is a schematic diagram of the air outlet and steel needle structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the internal structure of the cooling chamber of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Lower mold; 3. Injection cavity; 4. Upper mold; 5. Positioning block; 6. Guide rod; 7. Connecting plate; 8. Injection tube; 9. Vent hole; 10. Circular heating cavity; 11. Spring heating coil; 12. Wire; 13. Heat insulation layer; 14. Air vent; 15. Vertical through hole; 16. Horizontal through hole; 17. Steel needle; 18. Lifting plate; 19. Motor; 20. Threaded pipe; 21. Water pipe; 22. Cooling cavity; 23. Heat dissipation column. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 This utility model provides an embodiment of an injection mold for convenient venting, comprising a base plate 1, a lower mold 2 fixedly mounted on the top of the base plate 1, an upper mold 4 attached to the top of the lower mold 2, an injection cavity 3 fixedly mounted inside the lower mold 2, an injection tube 8 fixedly mounted at the middle of the top of the upper mold 4, two symmetrically arranged guide rods 6 fixedly mounted on the top of the base plate 1, a connecting plate 7 fixedly mounted at the end of the upper mold 4, a guide hole fixedly opened inside the connecting plate 7, the guide hole and the guide rod 6 being adapted to each other, two limiting grooves fixedly opened on the top of the lower mold 2 symmetrically arranged about the center line of the lower mold 2, and a positioning block 5 fixedly mounted on the bottom of the upper mold 4, the positioning block 5 and the limiting grooves being adapted to each other. When using this utility model, the upper mold 4 can be stably attached to the lower mold 2 by the setting of the limiting grooves, positioning block 5, guide rods 6 and connecting plate 7, and then the injection cavity 3 is injected through the injection tube 8 to produce products of the required size and shape. After the product is formed, the demolding operation is performed.

[0028] Considering that if the air inside the injection cavity 3 is not expelled during injection molding, it will cause problems such as air holes and defects in the product. This will not only affect the product quality, but also waste production time and costs, and may even damage the mold. Therefore, this utility model has two exhaust holes 9 fixedly provided inside the upper mold 4. The two exhaust holes 9 are symmetrically arranged about the center line of the upper mold 4 and penetrate through the upper and lower surfaces of the upper mold 4. By setting two exhaust holes 9, excess air in the injection cavity 3 can be expelled during the injection molding process, ensuring the airtightness of the product.

[0029] Due to the diversity of raw materials, processes, equipment, and the varying skill levels of operators during production, the vent hole 9 may become clogged with dust or rubber debris, requiring cleaning. Therefore, this invention includes a steel needle 17 slidably mounted inside the vent hole 9 via a lifting assembly. A heating assembly is installed inside the upper mold 4, comprising a circular heating cavity 10 fixedly mounted inside the upper mold 4. The vertical center lines of the circular heating cavity 10 and the vent hole 9 are aligned. A spring heating coil 11 is installed inside the circular heating cavity 10, with electrical wires 12 electrically connected to both ends of the spring heating coil 11. The wires 12 are electrically connected to an external controller. Additionally, the lifting assembly includes a lifting plate 18 fixedly mounted on the upper end of the steel needle 17. A motor 19 is fixedly mounted on the top of the upper mold 4, with a threaded tube 20 fixedly connected to the drive end of the motor 19. A threaded hole is provided inside the lifting plate 18, which mates with the threaded tube 20.

[0030] Furthermore, the top of the exhaust port 9 is provided with an air outlet cylinder 14 that is fixedly connected to the upper mold 4. The interior of the air outlet cylinder 14 is fixedly provided with a vertical through hole 15 and a horizontal through hole 16. The vertical through hole 15 and the horizontal through hole 16 are arranged perpendicularly to each other and are connected to each other. The vertical center lines of the vertical through hole 15 and the exhaust port 9 are on the same straight line, and the inner diameters of the vertical through hole 15 and the exhaust port 9 are the same.

[0031] Specifically, in the initial state, the lower end of the steel needle 17 is located inside the vertical through hole 15, and the lower end of the steel needle 17 is above the horizontal through hole 16. This ensures that the steel needle 17 will not detach from the air vent 14, and does not affect the discharge of excess air from the injection cavity 3 through the exhaust hole 9 and the horizontal through hole 16 in sequence. When the exhaust hole 9 is blocked by accumulated dust, the motor 19 is started, which drives the threaded tube 20 to rotate, thereby driving the lifting plate 18 and the steel needle 17 to move downward synchronously, so that the steel needle 17 pushes out the accumulated dust inside the exhaust hole 9 and clears the exhaust hole 9.

[0032] When the vent hole 9 is blocked by rubber foreign objects, due to the strong adhesiveness of the rubber foreign objects, the spring heating coil 11 is heated by an external controller, and the heating temperature of the spring heating coil 11 is controlled, thereby directly heating the circular heating chamber 10 and the vent hole 9, causing the rubber foreign objects to soften and expand. Then, a steel needle 17 is inserted into the vent hole 9 to push out the rubber foreign objects, thereby achieving the effect of clearing them. This heating process is relatively fast and the temperature can be precisely controlled, solving the problem that when using the heating method to unclog the vent hole 9 of the injection mold, the mold heating time is long and the temperature is difficult to control, which may burn the mold.

[0033] Furthermore, a heat insulation layer 13 is fixedly provided on the inner wall of the circular heating cavity 10. By providing the heat insulation layer 13, heat loss inside the circular heating cavity 10 is avoided, and the heating of the exhaust port 9 can be further accelerated.

[0034] Furthermore, a cooling chamber 22 is fixedly installed inside the lower mold 2. Several evenly distributed heat dissipation columns 23 are fixedly connected between the upper and lower inner walls of the cooling chamber 22. Water pipes 21 are fixedly connected to both ends of the lower mold 2. The water pipes 21 and the cooling chamber 22 are interconnected. After injection molding is completed, cooling water flows between the cooling chamber 22 and the two water pipes 21, thereby removing the heat from the lower mold 2 and accelerating the molding of the product. The arrangement of multiple heat dissipation columns 23 increases the contact area between the cooling chamber 22 and the cooling water, allowing the heat from the lower mold 2 to be removed more quickly. In addition, the arrangement of multiple heat dissipation columns 23 can block the water flow, so that the cooling water flows evenly inside the cooling chamber 22, thereby uniformly cooling the product and improving the quality of the product.

[0035] It should be noted that the spring heating coil 11 in this utility model is a hot runner spring heating coil, and both it and the external controller are existing technologies, which will not be further described in this application.

[0036] Working principle: When using this utility model, the upper mold 4 can be stably fitted with the lower mold 2 through the setting of the limiting groove, positioning block 5, guide rod 6 and connecting plate 7. Then, the injection molding operation is performed inside the injection cavity 3 through the injection tube 8. During the product injection process, excess air in the injection cavity 3 can be discharged sequentially through the vent hole 9 and the transverse through hole 16 to ensure the airtightness of the product. When the vent hole 9 is blocked by accumulated dust, the motor 19 is started, which drives the threaded tube 20 to rotate, thereby driving the lifting plate 18 and the steel needle 17 to move downward synchronously. This allows the steel needle 17 to push out the accumulated dust inside the vent hole 9 and clear the vent hole 9. When the vent hole 9 is blocked by rubber foreign objects, the spring heating coil 11 is heated by the external controller, and the heating temperature of the spring heating coil 11 is controlled. This directly heats the circular heating cavity 10 and the vent hole 9, softening and expanding the rubber foreign objects inside the vent hole 9. Then, the motor 19 is started again, which drives the steel needle 17 to insert into the vent hole 9 and push out the rubber foreign objects, thereby achieving the cleaning effect.

[0037] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. An injection mold for convenient venting, comprising a base plate (1), characterized in that: A lower mold (2) is fixedly installed on the top of the base plate (1), and an upper mold (4) is attached to the top of the lower mold (2). An injection cavity (3) is fixedly installed inside the lower mold (2). An injection tube (8) is fixedly installed in the middle of the top of the upper mold (4). An exhaust hole (9) is fixedly installed inside the upper mold (4). The exhaust hole (9) penetrates both the upper and lower surfaces of the upper mold (4). A steel needle (17) is slidably installed inside the exhaust hole (9) through a lifting assembly. A heating assembly is installed inside the upper mold (4). The heating assembly includes a circular heating cavity (10), which is fixedly installed inside the upper mold (4). The vertical center lines of the circular heating cavity (10) and the exhaust hole (9) are on the same straight line. A spring heating coil (11) is installed inside the circular heating cavity (10). Both ends of the spring heating coil (11) are electrically connected to wires (12), and the wires (12) are electrically connected to an external controller.

2. The injection mold for convenient venting according to claim 1, characterized in that: There are two vent holes (9), and the two vent holes (9) are symmetrically arranged about the center line of the upper mold (4).

3. The injection mold for convenient venting according to claim 1, characterized in that: The inner wall of the circular heating cavity (10) is fixedly provided with a heat insulation layer (13).

4. The injection mold for convenient venting according to claim 2, characterized in that: The lifting assembly includes a lifting plate (18), which is fixedly mounted on the upper end of the steel needle (17). A motor (19) is fixedly mounted on the top of the upper mold (4). A threaded tube (20) is fixedly connected to the drive end of the motor (19). A threaded hole is opened inside the lifting plate (18), and the threaded hole and the threaded tube (20) are matched.

5. The injection mold for convenient venting according to claim 4, characterized in that: The top of the exhaust hole (9) is provided with an air outlet cylinder (14) fixedly connected to the upper mold (4). The air outlet cylinder (14) has a vertical through hole (15) and a horizontal through hole (16) fixedly opened inside. The vertical through hole (15) and the horizontal through hole (16) are arranged perpendicular to each other and are connected to each other. The vertical center lines of the vertical through hole (15) and the exhaust hole (9) are on the same straight line, and the inner diameters of the vertical through hole (15) and the exhaust hole (9) are the same.

6. The injection mold for convenient venting according to claim 1, characterized in that: The lower mold (2) is fixedly provided with a cooling cavity (22). Several heat dissipation columns (23) are fixedly connected between the upper and lower inner walls of the cooling cavity (22). Water pipes (21) are fixedly connected to both ends of the lower mold (2). The water pipes (21) and the cooling cavity (22) are interconnected.

7. The injection mold for convenient venting according to claim 6, characterized in that: The top of the base plate (1) is fixedly provided with two symmetrically arranged guide rods (6), the end of the upper mold (4) is fixedly provided with a connecting plate (7), the inside of the connecting plate (7) is fixedly provided with a guide hole, the guide hole and the guide rod (6) are adapted to each other, the top of the lower mold (2) is fixedly provided with two limiting grooves symmetrically arranged about the center line of the lower mold (2), and the bottom of the upper mold (4) is fixedly provided with a positioning block (5), the positioning block (5) and the limiting groove are adapted to each other.

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