Plastic mold with rapid cooling function

Abstract

The application relates to the technical field of injection molds, in particular to a plastic mold with a rapid cooling function, which comprises a mold frame top base and a mold frame bottom base symmetrically arranged in an up-down mode, a guide column is arranged between the mold frame top base and the mold frame bottom base, a hopper is arranged on the lower surface of the mold frame top base, the bottom end of the hopper is provided with an upper mold base, the upper mold base is fixedly connected with the guide column, and the bottom surface of the upper mold base is further provided with an upper mold; a lower mold base is slidably arranged at the bottom of the guide column, and the top surface of the lower mold base is provided with a lower mold; the ejection assembly in the application is provided with a cooling channel, when the ejection assembly ejects a workpiece, cooling water can enter the cooling channel to reduce the temperature of the contact surface between the ejection assembly and the workpiece, so that the workpiece and the ejection assembly can be separated, and the product yield is improved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to a plastic mold with a rapid cooling function. Background Technology

[0002] In the manufacturing process of plastic products, injection molds are the core device for achieving efficient plastic molding. Existing injection molds are usually cooled by a water cooling system. The principle is to use a pre-set cooling channel inside the mold, and use an external water pump to drive cooling water to circulate into the cooling channel to absorb heat, accelerate the molding of the workpiece, thereby shortening the workpiece molding cycle and improving production efficiency.

[0003] In existing plastic molds, cooling channels are mostly concentrated on the outer periphery of the molding cavity, which can cool the workpiece's peripheral wall during the injection molding stage. However, the ejection mechanism of the mold is located inside the molding cavity and needs to perform frequent ejection actions, making it difficult to install a water cooling system. For example, Chinese patent CN217226418U proposes an injection molding machine for processing plastic parts molds that facilitates workpiece removal; it includes an injection molding mold, a spiral cooling pipe, and an ejector plate. The ejector plate is located inside the injection molding mold, while the spiral cooling pipe is embedded in the peripheral wall of the injection molding mold. After the workpiece is formed, the ejector plate needs to eject it upwards. However, due to the high temperature of the ejector plate itself, this high-temperature contact not only causes the workpiece surface to stick to the ejector plate, but also leaves ejection marks, scratches, and other defects on the workpiece surface due to stress during the disassembly process, seriously affecting the product's appearance quality and even causing deviations in workpiece dimensional accuracy, significantly increasing the defect rate. This problem is particularly prominent for high-gloss, precision-structured plastic products, increasing rework costs and material waste for manufacturers. Therefore, this invention proposes a plastic mold with rapid cooling function to effectively solve the above-mentioned drawbacks. Summary of the Invention

[0004] The purpose of this invention is to provide a plastic mold with a rapid cooling function to solve the problems mentioned in the background art.

[0005] This invention is achieved through the following technical solution: a plastic mold with rapid cooling function, comprising a mold base and a mold base symmetrically distributed vertically, a guide post between the mold base and the mold base, a hopper on the lower surface of the mold base, an upper mold base at the bottom of the hopper, the upper mold base and the guide post being fixedly connected, and an upper mold on the bottom surface of the upper mold base; a lower mold base is slidably provided at the bottom of the guide post, a lower mold on the top surface of the lower mold base, a drive cylinder for controlling the lifting and lowering of the lower mold base on the top surface of the mold base, a molding cavity on the bottom surface of the upper mold, an injection hole communicating with the inside of the hopper on the inner top surface of the molding cavity and on the upper mold base, a cooling cavity circumferentially formed around the periphery of the molding cavity, and a first inlet and a first outlet communicating with the cooling cavity on the outer sides of the upper mold respectively;

[0006] The molding cavity has ejection cavities on both the left and right sides of its inner top surface. Ejection assemblies are provided in the ejection cavities. The upper mold has a second water inlet and a second water outlet on its outer sides that communicate with the two ejection cavities.

[0007] The ejection assembly has a cooling channel, and the cooling channels in the two ejection assemblies are connected. When the ejection assembly is completely retracted into the ejection cavity, the cooling channel is not connected to the second water inlet. When the ejection assembly extends outward to eject the formed workpiece, the cooling channels in the two ejection assemblies are connected to the second water inlet and the second water outlet, respectively.

[0008] Optionally, the first water inlet and the second water inlet are connected to a common water inlet manifold, and a solenoid valve is provided on the end of the water inlet manifold closest to the first water inlet and the second water inlet.

[0009] Optionally, the first and second water outlets are connected to a common water outlet manifold, and a one-way valve is provided on the end of the water outlet manifold closest to the first and second water outlets.

[0010] Optionally, the cooling channel includes through holes distributed on both sides of the middle part of the ejector assembly, and an annular cavity located on the bottom surface of the ejector assembly. The two through holes are respectively connected to the annular cavity through extension holes.

[0011] Optionally, water channels are provided on both sides of the ejector cavity, and a water channel near the outer side of the two ejector cavities is connected to the second inlet and the second outlet, respectively.

[0012] When the ejector assembly is fully embedded inside the ejector cavity, the through hole is not connected to the water channel; when the ejector assembly extends outward, both through holes can connect to the water channel.

[0013] Optionally, the top surface of the upper mold has an annular hidden cavity, and the bottom surface of the hidden cavity has two guide holes that communicate with two water channels located on the inner side.

[0014] Optionally, the ejector assembly is a stepped shaft shape that is narrower at the top and wider at the bottom, and the top cross-section of the ejector assembly is square, with the bottom wall area of ​​the ejector assembly occupying between one-third and one-half of the top surface of the molding cavity.

[0015] Optionally, the top surface of the ejection assembly is provided with an ejection hole, and an ejection spring is provided between the ejection hole and the top wall of the ejection cavity.

[0016] Optionally, the top surface of the upper mold is provided with wiring grooves on both sides, and the outer left and right sides of the upper mold are provided with rotating shafts through hinge seats. A winding wheel and a driven gear ring are mounted on the rotating shaft. A steel wire rope is wound on the winding wheel, and the free end of the steel wire rope passes through the wiring groove, extends into the ejection cavity, and is connected to the ejection assembly.

[0017] The upper mold has vertically sliding adjustment rods on both sides of its outer surface. The adjustment rods are equipped with adjustment racks that mesh with the driven gear ring. When the adjustment rods are not subjected to external force, the ejection assembly is in the extended state, and the bottom end of the adjustment rods is lower than the lower surface of the upper mold.

[0018] Optionally, the displacement ratio of the ejector assembly and the adjusting rod is 1:1. When the upper mold and the lower mold are aligned and fitted, the bottom end of the adjusting rod abuts against the lower mold, and the ejector assembly is flush with the inner bottom surface of the molding cavity.

[0019] Compared with the prior art, the present invention provides a plastic mold with rapid cooling function, which has the following beneficial effects:

[0020] 1. The ejection assembly of the present invention has a cooling channel. When the ejection assembly ejects the workpiece, cooling water can enter the cooling channel to reduce the temperature of the contact surface between the ejection assembly and the workpiece, thereby facilitating the separation of the workpiece and the ejection assembly and improving the product yield.

[0021] 2. In this invention, during injection molding, water is only circulated in the cooling chamber to cool the peripheral wall of the workpiece, and during ejection, water is only circulated in the ejection assembly to cool the top wall of the workpiece. Since the adhesive resistance of the workpiece when separating from the molding cavity mainly comes from the peripheral wall of the workpiece, the above-mentioned staged cooling method can enable the workpiece to quickly reach the temperature threshold required for demolding, reduce unnecessary cooling waiting time, and help shorten the single molding cycle.

[0022] 3. In this invention, the sum of the bottom areas of the two ejection components exceeds two-thirds of the top area of ​​the forming cavity. Therefore, the actual adhesion area between the workpiece and the top wall of the forming cavity is very small, which makes the resistance that the ejection components need to overcome when ejecting the workpiece smaller, thus avoiding damage to the workpiece due to excessive adhesion stress. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the mold closing state of the present invention;

[0024] Figure 2 This is a schematic diagram of the demolding state of the present invention;

[0025] Figure 3 This is a first-view schematic diagram of the mold of the present invention;

[0026] Figure 4 This is a schematic diagram of the mold from a second perspective of the present invention;

[0027] Figure 5 This is a schematic diagram of the ejector component structure of the present invention;

[0028] Figure 6 This is a cross-sectional view of the ejector component of the present invention;

[0029] Figure 7 This is a cross-sectional view of the upper and lower molds of the present invention in the closed state;

[0030] Figure 8 This is a cross-sectional view of the upper and lower molds in the demolding state of the present invention;

[0031] Figure 9 for Figure 4 Enlarged view of point A in the middle.

[0032] In the diagram: 100, mold base top seat; 101, guide post; 102, pusher cylinder; 200, mold base; 201, drive cylinder; 300, hopper; 301, pusher piston; 400, upper mold base; 500, upper mold; 501, molding cavity; 502, injection hole; 503, cooling cavity; 504, first water inlet; 505, first water outlet; 506, ejection cavity; 507, second water inlet; 508, second water outlet; 509, main water inlet pipe; 510, solenoid valve; 511 512. Main water outlet pipe; 513. Check valve; 514. Water passage groove; 515. Hidden cavity; 516. Guide hole; 517. Wiring groove; 518. Rotating shaft; 519. Winding wheel; 520. Driven gear ring; 521. Steel wire rope; 522. Adjusting rod; 523. Adjusting rack; 600. Lower mold base; 601. Lower mold; 700. Ejection assembly; 701. Cooling channel; 7011. Through hole; 7012. Annular cavity; 7013. Extension hole; 702. Ejection spring; 703. Pop-out hole. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] Example 1: Please refer to Figure 1 - Figure 8 This application proposes a plastic mold with rapid cooling function, including a mold base 100 and a mold base 200 symmetrically distributed vertically. Four guide pillars 101 are provided between the mold base 100 and the mold base 200, and both ends of the guide pillars 101 are fixedly connected to the mold base 100 and the mold base 200, respectively. A hopper 300 is provided on the lower surface of the mold base 100, and an upper mold base 400 is provided at the bottom end of the hopper 300. The upper mold base 400 is fixedly connected to the guide pillars 101, and an upper mold 500 is also provided on the bottom surface of the upper mold base 400. A pusher cylinder 102 is provided on the top surface of the mold base 100, and a pusher piston 301 is provided inside the hopper 300. The actuating end of the pusher cylinder 102 extends into the hopper 300 and is connected to the pusher piston 301.

[0035] like Figure 1 As shown, a lower mold base 600 is slidably provided at the bottom of the guide column 101, and a lower mold 601 is provided on the top surface of the lower mold base 600. A drive cylinder 201 for controlling the lifting and lowering of the lower mold base 600 is also provided on the top surface of the mold frame base 200. The lower mold base 600 is slidably engaged with the guide column 101 through a linear bearing, while the drive cylinder 201 is used to directly control the lifting and lowering of the lower mold base 600 to realize the mold closing and demolding processes of the upper mold 500 and the lower mold 601.

[0036] The bottom surface of the upper mold 500 has a forming cavity 501, such as... Figure 7As shown, the inner top surface of the molding cavity 501 and the upper mold base 400 are provided with injection holes 502 that communicate with the inside of the hopper 300. A cooling cavity 503 is provided around the periphery of the molding cavity 501. The outer sides of the upper mold 500 are respectively provided with a first water inlet 504 and a first water outlet 505 that communicate with the cooling cavity 503. Ejection cavities 506 are provided on both the left and right sides of the inner top surface of the molding cavity 501. An ejection assembly 700 is provided in the ejection cavity 506. The outer sides of the upper mold 500 are respectively provided with a second water inlet 507 and a second water outlet 508 that communicate with the two ejection cavities 506. In this embodiment, the upper mold 500 and the lower mold 601 are made of stainless steel or aluminum alloy. The molding cavity 501 is square or round. When the upper mold 500 and the lower mold 601 are closed, the top of the lower mold 601 extends into the molding cavity 501 and forms an injection space with the inner wall of the molding cavity 501.

[0037] It should be noted that when the pusher piston 301 moves downward, it can push the molten material through the injection hole 502 into the molding cavity 501. In addition, in order to keep the material in the hopper 300 in a molten state at all times, this embodiment provides a heating component, such as an electric heating wire, on the outside of the hopper 300 to maintain the temperature of the hopper 300. In addition, it should be pointed out that when making the cooling cavity 503, it is necessary to drill from bottom to top around the molding cavity 501, and a sealing element is embedded at the bottom of the cooling cavity 503 to make the cooling cavity 503 a closed cavity. The sealing element is flush with the bottom surface of the lower mold 601 by welding.

[0038] Furthermore, the ejector assembly 700 has a cooling channel 701, and the cooling channels 701 in the two ejector assemblies 700 are interconnected. When the ejector assembly 700 is fully retracted into the ejection cavity 506, the cooling channel 701 is not interconnected with the second inlet 507; when the ejector assembly 700 extends outward to eject the molded workpiece, the cooling channels 701 in the two ejector assemblies 700 are interconnected with the second inlet 507 and the second outlet 508, respectively. That is to say, in the mold-closed state, the ejector assembly 700 does not have a cooling effect; however, when the ejector assembly 700 ejects the molded workpiece outward, cooling water can be introduced into the ejector assembly 700 to perform a cooling action.

[0039] The following is a detailed description of how cooling channel 701 and cooling chamber 503 work alternately:

[0040] A main water inlet pipe 509 is connected to both the first water inlet 504 and the second water inlet 507. A solenoid valve 510 is installed on the end of the main water inlet pipe 509 closest to both the first water inlet 504 and the second water inlet 507. A main water outlet pipe 511 is connected to both the first water outlet 505 and the second water outlet 508. A one-way valve 512 is installed on the end of the main water outlet pipe 511 closest to both the first water outlet 505 and the second water outlet 508. Specifically, when the upper mold 500 and the lower mold 601 are closed, only the solenoid valve 510 connected to the first water inlet 504 is open; when the ejector assembly 700 ejects the formed workpiece, only the solenoid valve 510 connected to the second water inlet 507 is open, thus allowing cooling water to alternately enter the cooling chamber 503 or the cooling channel 701.

[0041] like Figure 5 , 6 As shown, the cooling channel 701 includes through holes 7011 distributed on both sides of the middle part of the ejector assembly 700, and an annular cavity 7012 located on the bottom surface of the ejector assembly 700. The two through holes 7011 communicate with the annular cavity 7012 through extension holes 7013. It should be noted that the annular cavity 7012 is opened on the bottom surface of the ejector assembly 700 and then closed by a sealing cover to form a closed cavity.

[0042] Water channels 513 are provided on both sides of the ejection chamber 506. The water channels 513 near the outer side of the two ejection chambers 506 are connected to the second water inlet 507 and the second water outlet 508 respectively. When the ejection assembly 700 is fully embedded in the ejection chamber 506, the through hole 7011 is not connected to the water channel 513. When the ejection assembly 700 extends outward, both through holes 7011 can be connected to the water channel 513. Specifically, when the ejector assembly 700 is fully embedded inside the ejector cavity 506, the bottom surface of the ejector assembly 700 is flush with the inner top surface of the forming cavity 501, and cooling water cannot enter the second inlet 507; when the ejector assembly 700 extends outward until the through hole 7011 and the water channel 513 are aligned, cooling water can enter the annular cavity 7012 through the second inlet 507, the water channel 513, and the through hole 7011, thereby cooling the contact surface between the ejector assembly 700 and the formed workpiece.

[0043] It should be added that a sealing ring is also fixedly embedded around the water channel 513. This sealing ring is always in close contact with the outer surface of the ejector assembly 700 to prevent cooling water leakage.

[0044] The top surface of the upper mold 500 has an annular hidden cavity 514, and the bottom surface of the hidden cavity 514 has two guide holes 515 that communicate with the two water channels 513 located on the inner side, respectively. Figure 8As shown; at the same time, the top of the hidden cavity 514 also has a cover that closes the hidden cavity 514; the hidden cavity 514 and the two guide holes 515 connect the two water channels 513 near the inner side in the two ejection cavities 506, so that the two cooling channels 701 are connected when the two ejection assemblies 700 are extended.

[0045] Meanwhile, the ejector assembly 700 is a stepped shaft shape, narrower at the top and wider at the bottom, and its top cross-section is square. The bottom wall area of ​​the ejector assembly 700 occupies between one-third and one-half of the top surface of the molding cavity 501. The ejector assembly 700 is made of aluminum alloy. When the ejector assembly 700 is fully embedded in the ejector cavity 506, the gap between the ejector assembly 700 and the side wall of the ejector cavity 506 is no more than 0.2 mil. The gap between the two is extremely small, and because the molten plastic itself is viscous, it is difficult for the plastic to enter the gap between them, so as to avoid flash on the molded workpiece as much as possible.

[0046] Furthermore, the sum of the bottom areas of the two ejector components 700 exceeds two-thirds of the top surface inside the molding cavity 501. Therefore, when the ejector component 700 extends downward to separate the molded workpiece from the top surface inside the molding cavity 501, the adhesive force between the molded workpiece and the top surface inside the molding cavity 501 is not very large.

[0047] In practical application, in the initial state, the upper mold 500 and the lower mold 601 are in the closed state. At this time, under the action of the pusher piston 301, the molten plastic enters the molding cavity 501. Subsequently, the solenoid valve 510 connected to the first water inlet 504 is opened, and cooling water enters the cooling cavity 503, so that the outer peripheral wall of the molding cavity 501 is cooled first. It should be noted that since the upper mold 500 itself has good thermal conductivity, even if the cooling water is only distributed on the periphery of the molding cavity 501, the temperature of the top wall of the molding cavity 501 will also drop, but the drop is not as large as that of its peripheral wall.

[0048] After a period of time, the lower mold 601 moves downwards for demolding, and simultaneously, the ejector assembly 700 moves downwards synchronously with the lower mold 601. At this time, cooling water is directed only into the second inlet 507, allowing the cooling water to pass through the two cooling channels 701 sequentially before exiting from the second outlet 508. When the cooling water enters the cooling channels 701, it cools the ejector assembly 700, making it easier to separate the ejector assembly 700 from the workpiece. This embodiment achieves a staged cooling effect by alternately introducing cooling water into the cooling chamber 503 and the cooling channels 701, which helps the workpiece quickly reach the temperature threshold required for demolding, reduces unnecessary cooling waiting time, and shortens the single molding cycle.

[0049] Example 2: Please refer to Figure 1 - Figure 9This application also proposes a plastic mold with rapid cooling function. The difference between this embodiment and Embodiment 1 is that: the top surface of the ejector assembly 700 is provided with an ejection hole 703, and an ejection spring 702 is provided between the ejection hole 703 and the top wall of the ejection cavity 506; when the ejector assembly 700 is safely embedded in the ejection cavity 506, the ejection spring 702 is in a compressed state. The top surface of the upper mold 500 is provided with wiring grooves 516 on both opposite sides. The left and right sides of the outer side of the upper mold 500 are provided with a rotating shaft 517 through a hinge seat. A winding wheel 518 and a driven gear ring 519 are mounted on the rotating shaft 517. A steel wire rope 520 is wound on the winding wheel 518. The free end of the steel wire rope 520 passes through the wiring groove 516 and extends into the ejection cavity 506 and is connected to the ejector assembly 700; that is, by rotating the rotating shaft 517, the steel wire rope 520 can be pulled to indirectly control the ejection assembly 700 to eject or retract.

[0050] Furthermore, both sides of the upper mold 500 are equipped with vertically sliding adjusting rods 521, each with an adjusting rack 522 that meshes with the driven gear ring 519. When the adjusting rods 521 are not subjected to external force, the ejector assembly 700 is in an extended state, and the bottom end of the adjusting rods 521 is lower than the lower surface of the upper mold 500. The displacement ratio between the ejector assembly 700 and the adjusting rods 521 is 1:1. When the upper mold 500 and the lower mold 601 are aligned and fitted, the bottom end of the adjusting rods 521 abuts against the lower mold 601, and the ejector assembly 700 is flush with the inner bottom surface of the molding cavity 501. That is, in the mold-closed state, the bottom wall of the ejector assembly 700 is flush with the inner top surface of the molding cavity 501. When the lower mold 601 moves downward, the ejector assembly 700 can automatically pop out under the action of the ejector spring 702, and maintain synchronous movement with the lower mold 601.

[0051] In practical applications, the ejector assembly 700 can automatically eject the workpiece. During demolding, the ejector assembly 700 can move synchronously with the lower mold 601, so that the workpiece can separate from the molding cavity 501 while adhering to the lower mold 601. This avoids the workpiece being damaged due to the demolding stress not being concentrated caused by the lower mold 601 moving alone.

[0052] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A plastic mold with rapid cooling function, comprising a mold base and a mold frame top seat symmetrically distributed vertically, a guide post between the mold base and the mold frame top seat, a hopper on the lower surface of the mold base, an upper mold seat at the bottom end of the hopper, the upper mold seat and the guide post being fixedly connected, and an upper mold on the bottom surface of the upper mold seat; a lower mold seat slidably disposed at the bottom of the guide post, a lower mold on the top surface of the lower mold seat, and a drive cylinder for controlling the lifting and lowering of the lower mold seat on the top surface of the mold frame base, characterized in that: The bottom surface of the upper mold is recessed to form a molding cavity. The inner top surface of the molding cavity and the upper mold base are both provided with injection holes that communicate with the inside of the hopper. A cooling cavity is provided around the periphery of the molding cavity. The outer sides of the upper mold are respectively provided with a first water inlet and a first water outlet that communicate with the cooling cavity. The molding cavity has ejection cavities on both the left and right sides of its inner top surface. Ejection components are respectively installed in the two ejection cavities. The upper mold has a second water inlet and a second water outlet on its outer sides that communicate with the two ejection cavities. The ejector assembly has a cooling channel, and the cooling channels in the two ejector assemblies are connected by a preset connecting structure. When the ejector assembly is completely retracted into the ejection cavity, the cooling channel and the second water inlet are not connected. When the ejector assembly extends outward to eject the formed workpiece, the cooling channels in the two ejector assemblies are connected to the second water inlet and the second water outlet respectively, so that the cooling medium flows through the second water inlet, the cooling channel and the second water outlet in sequence to form a circulation loop.

2. A plastic mold with rapid cooling function according to claim 1, characterized in that: The first and second water inlets are connected to a common water inlet manifold, and a solenoid valve is provided on the end of the water inlet manifold closest to the first and second water inlets.

3. A plastic mold with rapid cooling function according to claim 1, characterized in that: The first and second water outlets are connected to a common water outlet main pipe, and a one-way valve is provided on the end of the water outlet main pipe that is close to the first and second water outlets.

4. A plastic mold with rapid cooling function according to claim 1, characterized in that: The cooling channel includes through holes distributed on both sides of the middle part of the ejector assembly, and an annular cavity located on the bottom surface of the ejector assembly. The two through holes are respectively connected to the annular cavity through extension holes.

5. A plastic mold with rapid cooling function according to claim 4, characterized in that: Water channels are provided on both sides of the ejector cavity, and a water channel near the outer side of the two ejector cavities is connected to the second inlet and the second outlet respectively. When the ejector assembly is fully embedded inside the ejector cavity, the through hole is not connected to the water channel; when the ejector assembly extends outward, both through holes can connect to the water channel.

6. A plastic mold with rapid cooling function according to claim 5, characterized in that: The top surface of the upper mold has an annular hidden cavity, and the bottom surface of the hidden cavity has two guide holes that are respectively connected to two water channels located on the inner side.

7. A plastic mold with rapid cooling function according to any one of claims 1-6, characterized in that: The ejector assembly is a stepped shaft that is narrow at the top and wide at the bottom, and the top cross-section of the ejector assembly is square. The bottom wall area of ​​the ejector assembly occupies between one-third and one-half of the top surface of the molding cavity.

8. A plastic mold with rapid cooling function according to claim 1, characterized in that: The top surface of the ejection assembly is provided with an ejection hole, and an ejection spring is provided between the ejection hole and the top wall of the ejection cavity.

9. A plastic mold with rapid cooling function according to claim 1, characterized in that: The top surface of the upper mold is provided with wiring grooves on both sides. The left and right sides of the outside of the upper mold are provided with rotating shafts through hinge seats. A winding wheel and a driven gear ring are mounted on the rotating shaft. A steel wire rope is wound on the winding wheel. The free end of the steel wire rope passes through the wiring groove, extends into the ejection cavity, and is connected to the ejection assembly. The upper mold has vertically sliding adjustment rods on both sides of its outer surface. The adjustment rods are equipped with adjustment racks that mesh with the driven gear ring. When the adjustment rods are not subjected to external force, the ejection assembly is in the extended state, and the bottom end of the adjustment rods is lower than the lower surface of the upper mold.

10. A plastic mold with rapid cooling function according to claim 1, characterized in that: The displacement ratio of the ejector assembly and the adjusting rod is 1:

1. When the upper mold and the lower mold are aligned and fitted, the bottom end of the adjusting rod abuts against the lower mold, and the ejector assembly is flush with the inner bottom surface of the forming cavity.

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