Efficient cooling injection mold

Abstract

The invention discloses an efficient cooling injection mold and belongs to the technical field of injection molds, the efficient cooling injection mold comprises a fixed mold structure and a movable mold structure, the fixed mold structure comprises a lower cavity, a plurality of first heat dissipation openings are linearly formed in the two sides of the lower cavity at equal intervals, and the movable mold structure comprises an upper cavity; a plurality of second heat dissipation openings are linearly formed in the two sides of the upper cavity at equal intervals, the upper cavity and the lower cavity are jointly provided with a cooling heat dissipation assembly, the cooling heat dissipation assembly comprises a first fin structure and a second fin structure, the first fin structure is matched with the first heat dissipation openings, and the second fin structure is matched with the second heat dissipation openings; by means of the mold, the cooling efficiency is improved, compared with internal cooling circulation of a traditional mold, the sealing problem existing in an internal water channel is effectively avoided, normal operation of the mold and injection molding equipment due to leakage of cooling liquid is avoided, the cost is lower, and the service life of the mold is prolonged.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of injection molds, and specifically provides an injection mold with efficient cooling. Background Art

[0002] An injection mold is a tool used for injection molding. Injection molding is a molding method in which thermoplastic or thermosetting plastics are heated and melted by a plastic molding device, and then the plastic melt is pushed by a screw or a plunger to be injected into a closed mold cavity at a certain pressure and speed. After pressure holding and cooling and solidification, a plastic product with a specific shape and size is obtained. The injection mold is the tool that makes the plastic form into a product with a specific shape and size.

[0003] In current existing injection molds, in order to improve the cooling efficiency in the mold cavity, a method of opening cooling water channels in the mold is generally adopted, and the heat of the mold is carried away by the circulating cooling water. However, in the design process of this method, factors such as the shape, size, cavity distribution of the mold and the requirements of the plastic molding process need to be comprehensively considered to ensure uniform cooling and avoid local overheating or overcooling. The cost is high, and the diameter, length, bending radius of the water channel and the distance from the mold surface all need to be strictly controlled within a certain tolerance range. If the accuracy is insufficient, it may lead to poor cooling effect, affecting the quality of plastic parts. The cooling water may contain various minerals and impurities, and scale will be formed on the inner wall of the water channel after long-term use, reducing the heat transfer efficiency and affecting the cooling effect. At the same time, the water may also have a corrosive effect on the water channel wall. Especially when the water contains some corrosive media, it will shorten the service life of the water channel and even cause water channel leakage, thus shortening the overall service life of the mold. Summary of the Invention

[0004] The technical solution of the present invention provides a solution significantly different from the prior art for the technical problem that the prior art solution is too single. Specifically, the present invention mainly provides an injection mold with efficient cooling to solve the technical problems of high cost and short service life in the current existing injection molds as mentioned in the above background art.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows: An efficient cooling injection mold, comprising a fixed mold structure and a movable mold structure, which cooperate with each other. The fixed mold structure includes a lower cavity, and a plurality of first heat dissipation openings are linearly arranged at equal intervals on both sides of the lower cavity. The movable mold structure includes an upper cavity, and a plurality of second heat dissipation openings are linearly arranged at equal intervals on both sides of the upper cavity. A cooling and heat dissipation assembly is jointly arranged on the upper cavity and the lower cavity. The cooling and heat dissipation assembly includes a first fin structure and a second fin structure. The inside of the fin structure is hollow, and the coolant can flow inside the fin structure. The first fin structure cooperates with the first heat dissipation openings, and the second fin structure cooperates with the second heat dissipation openings.

[0006] Preferably, two plugs are arranged on the upper side of the first fin structure, and each plug is inserted with a joint, and the joint is arranged on the lower side of the second fin structure.

[0007] Preferably, a sealing ring is arranged between the plug and the corresponding joint.

[0008] Preferably, a water inlet and a water outlet are respectively arranged on the lower side of the first fin structure and the upper side of the second fin structure.

[0009] Preferably, the cooling and heat dissipation assembly further includes a driving device. The driving device includes a support frame and a motor. A positive and negative double-threaded screw rod is arranged between the support frame and the motor. The output end of the motor is connected to one end of the positive and negative double-threaded screw rod. Nut seats are arranged in different thread sections of the positive and negative double-threaded screw rod. A connecting plate is arranged on each nut seat. The two connecting plates are respectively connected with a first bracket and a second bracket through bolts. The upper side of the first bracket is connected with the first fin structure, and the upper side of the second bracket is connected with the second fin structure.

[0010] Preferably, the fixed mold structure further includes a base, two detachable pads are arranged on the base, a bottom plate is jointly arranged on the two pads, and the bottom plate is connected to the lower cavity through bolts.

[0011] Preferably, a lower core is arranged in the groove of the lower cavity, lower positioning blocks are arranged on both outer walls of the lower cavity, and positioning holes are arranged on the lower positioning blocks.

[0012] Preferably, an upper core is arranged in the groove of the upper cavity, the upper core and the lower core cooperate with each other. An injection port is arranged at the middle position of the upper cavity. Upper positioning blocks are arranged on both outer walls of the upper cavity. A guide post is arranged in each upper positioning block, and each guide post cooperates with the positioning hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are: The present invention realizes an increase in the heat dissipation surface area of the mold by providing a lower cavity, a first heat dissipation opening, a lower core, a lower positioning block, a base, a spacer block, a bottom plate, an upper cavity, a second heat dissipation opening, an upper core, an upper positioning block, a guide post, and an injection port, accelerating the heat exchange with the surrounding air, enabling the mold heat to be dissipated more quickly, improving the cooling efficiency, shortening the injection molding cycle, thereby enhancing the production efficiency, effectively preventing the mold from being in a high-temperature state for a long time, reducing the risk of the mold material properties deteriorating and wear intensifying due to high temperature, extending the service life of the mold, reducing the mold maintenance and replacement costs. At the same time, the rapid and uniform cooling can reduce problems such as deformation and shrinkage marks of the plastic part caused by uneven cooling, improving the product quality. (2) The present invention further accelerates the heat exchange process by providing a first fin structure, a plug, a second fin structure, a joint, a sealing ring, a water inlet, and a water outlet. The coolant is injected into the fin structure, and at the same time, the fin structure is inserted into the heat dissipation opening of the cavity, which can quickly take away the heat. With the heat dissipation ports linearly distributed at equal intervals, under the dual action, the cooling efficiency is greatly improved. Compared with the internal cooling cycle of traditional molds, it effectively avoids the sealing problems of the internal water channels, and there will be no problem that the coolant leaks due to the aging of the sealing parts or the corrosion of the water channel walls after long-term use, affecting the normal operation of the mold and injection equipment. It is convenient to directly replace the cooling and heat dissipation components without affecting the internal structure of the mold, with lower costs, and improves the service life of the mold itself.

[0014] (3) The present invention realizes that after the injection in the cavity is completed, the first fin structure and the second fin structure can be automatically inserted into the heat dissipation openings of the corresponding cavities for efficient and rapid cooling by providing a support frame, a positive and negative double-threaded lead screw, a nut seat, a connecting plate, a first support, a second support, and a motor. There is no need for manual operation, which has extremely high convenience, reduces the working intensity of the operator, and also reduces the risk of production accidents caused by improper manual operation. It closely cooperates with each mold device, improves the efficiency of the cooling work, and truly realizes an intelligent and efficient production mode.

[0015] The following will explain the present invention in detail in combination with the drawings and specific embodiments. Brief Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the present invention; Figure 2 is the exploded view of the overall structure of the present invention; Figure 3 is the exploded view of the fixed mold structure of the present invention; Figure 4 is the exploded view of the moving mold structure of the present invention; Figure 5 is the exploded view of the cooling and heat dissipation components of the present invention; Figure 6 For the present invention Figure 5 Schematic enlarged view of Area A.

[0017] In the figure: 1, fixed mold structure; 11, lower cavity; 111, first heat dissipation opening; 12, lower core; 13, lower positioning block; 131, positioning hole; 14, base; 15, spacer block; 16, bottom plate; 2, moving mold structure; 21, upper cavity; 211, second heat dissipation opening; 22, upper core; 23, upper positioning block; 231, guide post; 24, injection port; 3, cooling and heat dissipation assembly; 31, first fin structure; 311, plug; 32, second fin structure; 321, joint; 322, sealing ring; 33, water inlet; 34, water outlet; 35, support frame; 36, positive and negative double-threaded screw rod; 361, nut seat; 362, connecting plate; 37, first bracket; 38, second bracket; 39, motor. Specific embodiments

[0018] For the convenience of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0021] Embodiment 1, please refer to the attached Figures 1-6As shown in the figure, an efficient cooling injection mold includes a fixed mold structure 1 and a movable mold structure 2. The fixed mold structure 1 and the movable mold structure 2 cooperate with each other. The fixed mold structure 1 includes a lower cavity 11, and a plurality of first heat dissipation openings 111 are linearly arranged at equal intervals on both sides of the lower cavity 11. The movable mold structure 2 includes an upper cavity 21, and a plurality of second heat dissipation openings 211 are linearly arranged at equal intervals on both sides of the upper cavity 21. A cooling and heat dissipation component 3 is jointly arranged on the upper cavity 21 and the lower cavity 11. The cooling and heat dissipation component 3 includes a first fin structure 31 and a second fin structure 32. The inside of the fin structure is hollow, and the coolant can flow inside the fin structure. The first fin structure 31 cooperates with the first heat dissipation openings 111, and the second fin structure 32 cooperates with the second heat dissipation openings 211.

[0022] Through the above structure, the contact area between the mold and the outside air is increased, the air flow is accelerated, the heat exchange process is strengthened, part of the heat can be taken away by natural convection or forced convection, the cooling efficiency is improved, and the heat can be further efficiently taken away by the cooperation of the fin structure with the coolant injected inside. Under the dual action, the cooling efficiency is greatly improved. Compared with the internal cooling cycle of the traditional mold, the sealing problem existing in the internal water channel is effectively avoided, and there will be no problem that the coolant leaks due to the aging of the seal or the corrosion of the water channel wall after long-term use, affecting the normal operation of the mold and the injection molding equipment. It is convenient to directly replace the cooling and heat dissipation component 3 without affecting the internal structure of the mold, with lower cost and longer service life of the mold itself.

[0023] The specific operation is as follows. After injection molding is completed through the injection port 24, the motor 39 is started to drive the forward and reverse double-threaded screw rod 36 to rotate. Then, the nut seat 361 drives the first bracket 37 and the second bracket 38 to move towards the middle position of the forward and reverse double-threaded screw rod 36 through the connecting plate 362. Then, the first fin structure 31 moves towards the lower cavity 11, and the second fin structure 32 moves towards the upper cavity 21 until the first fin structure 31 and the first heat dissipation openings 111 are completely matched, and the second fin structure 32 and the second heat dissipation openings 211 are completely matched. Then the motor 39 stops rotating. Then, through an external water pump (existing equipment, not shown in the figure), the coolant is introduced into the water inlet 33, and then enters the first fin structure 31 for heat exchange. Then, through the cooperation between the plug 311 and the joint 321, the coolant flows into the second fin structure 32 for heat exchange and cooling, and then is discharged from the water outlet 34 and circulated and cooled by an external pipeline.

[0024] Example 2, please refer to the appendix Figure 3 and 4As shown, the fixed mold structure 1 further includes a base 14, on which two detachable pads 15 are provided. A bottom plate 16 is provided on the two pads 15. The bottom plate 16 is bolted to the lower cavity 11. Through the cooperation among the base 14, the pads 15 and the bottom plate 16, a stable injection molding environment is provided for the lower cavity 11, and at the same time, it is convenient for the double-threaded lead screw 36 to pass through the lower part of the lower cavity 11. A lower core 12 is arranged in the groove of the lower cavity 11. Lower positioning blocks 13 are arranged on both sides of the outer wall of the lower cavity 11. A positioning hole 131 is provided on the lower positioning block 13. An upper core 22 is arranged in the groove of the upper cavity 21. The upper core 22 and the lower core 12 cooperate with each other. An injection port 24 is arranged at the middle position of the upper cavity 21. Upper positioning blocks 23 are arranged on both sides of the outer wall of the upper cavity 21. A guide post 231 is arranged in each upper positioning block 23, and each guide post 231 cooperates with the positioning hole 131. Through the mutual cooperation among the two positioning blocks, the guide posts 231 and the positioning holes 131, during the mold closing process, the upper cavity 21 and the lower cavity 11 can be accurately guided to close according to the predetermined position and direction, ensuring that all parts of the mold cavity can be accurately aligned. This is crucial for ensuring the dimensional accuracy and shape accuracy of the injection molded product. If the mold closing accuracy is insufficient, problems such as flash, burrs, and dimensional deviation may occur in the product.

[0025] Embodiment 3, please refer to the attached Figure 5 and 6As shown, two plugs 311 are provided on the upper side of the first fin structure 31. Each plug 311 is inserted with a joint 321. The joint 321 is provided on the lower side of the second fin structure 32. A sealing ring 322 is provided between the plug 311 and the corresponding joint 321. Through the mutual cooperation among the joint 321, the plug 311 and the sealing ring 322, the stable introduction of the coolant from the first fin structure 31 into the second fin structure 32 is realized. An inlet 33 and an outlet 34 are respectively provided on the lower side of the first fin structure 31 and the upper side of the second fin structure 32. Through the mutual cooperation between the inlet 33 and the outlet 34, the introduction and export of the coolant are realized. The cooling and heat dissipation assembly 3 further includes a driving device. The driving device includes a support frame 35 and a motor 39. A positive and negative double-threaded screw rod 36 is provided between the support frame 35 and the motor 39. The output end of the motor 39 is connected to one end of the positive and negative double-threaded screw rod 36. Nut seats 361 are provided in different thread sections of the positive and negative double-threaded screw rod 36. A connecting plate 362 is provided on each nut seat 361. The two connecting plates 362 are respectively connected to a first bracket 37 and a second bracket 38 through bolts. The upper side of the first bracket 37 is connected to the first fin structure 31, and the upper side of the second bracket 38 is connected to the second fin structure 32. Through the driving device, the driving of the first fin structure 31 and the second fin structure 32 is realized, so that the two fin structures move closer to each other simultaneously and are inserted into the corresponding heat dissipation openings for cooling treatment.

[0026] The above has made an exemplary description of the present invention in conjunction with the drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A high-efficiency cooling injection mold, comprising a fixed mold structure (1) and a movable mold structure (2), wherein the fixed mold structure (1) and the movable mold structure (2) cooperate with each other, and are characterized in that The fixed mold structure (1) comprises a lower mold cavity (11), and a plurality of first heat dissipation openings (111) are linearly arranged at equal intervals on both sides of the lower mold cavity (11); the movable mold structure (2) comprises an upper mold cavity (21), and a plurality of second heat dissipation openings (211) are linearly arranged at equal intervals on both sides of the upper mold cavity (21); a cooling and heat dissipation component (3) is commonly arranged on the upper mold cavity (21) and the lower mold cavity (11); the cooling and heat dissipation component (3) comprises a first fin structure (31) and a second fin structure (32); the fin structure is hollow inside, and a coolant can flow in the fin structure; the first fin structure (31) cooperates with the first heat dissipation opening (111), and the second fin structure (32) cooperates with the second heat dissipation opening (211).

2. The efficient cooling injection mold according to claim 1, characterized in that: Two plugs (311) are arranged on the upper side of the first fin structure (31), each of the plugs (311) is plugged with a connector (321), and the connector (321) is arranged on the lower side of the second fin structure (32).

3. The efficient cooling injection mold according to claim 2, characterized in that: A sealing ring (322) is provided between the plug (311) and the corresponding joint (321).

4. The efficient cooling injection mold according to claim 2, characterized in that: A water inlet (33) and a water outlet (34) are respectively provided on the lower side of the first fin structure (31) and the upper side of the second fin structure (32).

5. The efficient cooling injection mold according to claim 1, characterized in that: The cooling and heat dissipation component (3) also includes a driving device, which includes a support frame (35) and a motor (39). A forward and reverse double-threaded screw rod (36) is arranged between the support frame (35) and the motor (39). The output end of the motor (39) is connected to one end of the forward and reverse double-threaded screw rod (36). Nut seats (361) are arranged in different thread intervals of the forward and reverse double-threaded screw rod (36). Each of the nut seats (361) is provided with a connecting plate (362). The two connecting plates (362) are respectively connected to the first bracket (37) and the second bracket (38) by bolts. The upper side of the first bracket (37) is connected to the first fin structure (31), and the upper side of the second bracket (38) is connected to the second fin structure (32).

6. The efficient cooling injection mold according to claim 1, characterized in that: The fixed mold structure (1) further comprises a base (14), two detachable cushion blocks (15) are arranged on the base (14), a bottom plate (16) is commonly arranged on the two cushion blocks (15), and the bottom plate (16) and the lower mold cavity (11) are connected via bolts.

7. The efficient cooling injection mold according to claim 6, characterized in that: A lower core (12) is arranged in the groove of the lower cavity (11), lower positioning blocks (13) are arranged on both sides of the outer wall of the lower cavity (11), and positioning holes (131) are arranged on the lower positioning blocks (13).

8. The efficient cooling injection mold according to claim 1, characterized in that: An upper core (22) is arranged in the groove of the upper cavity (21), and the upper core (22) and the lower core (12) cooperate with each other. An injection port (24) is arranged in the middle of the upper cavity (21). Upper positioning blocks (23) are arranged on both sides of the outer wall of the upper cavity (21), and each of the upper positioning blocks (23) is arranged in a guide column (231), and each guide column (231) cooperates with the positioning hole (131).

Images