An injection mold that facilitates demolding

Abstract

This invention relates to the field of injection mold technology, specifically to an injection mold that facilitates demolding. It includes a mold base, a fixed mold fixedly mounted on the upper surface of the mold base, a movable mold positioned above the fixed mold, a molding cavity positioned above the fixed mold, and a cooling assembly positioned below the fixed mold. The beneficial effect is that by placing the cooling assembly below the fixed mold, water flows through the lower and side cooling cavities to achieve rapid and uniform cooling of the injection mold inside the molding cavity. Then, the movable mold is disassembled, causing the ejector plate to be forced upwards under the elastic push of the ejector spring, which in turn moves the extrusion plug upwards. At this time, the connecting pipe sealing plug can be opened, and water will enter the water pressure ejection pipe through the connecting pipe, causing the water pressure inside the water pressure ejection pipe to rise. The sealing ejection diaphragm is pushed up and expands, causing the movable short rod to rise, and the ejection pin will eject the workpiece inside the molding cavity, achieving easy demolding.

Description

Technical Field

[0001] This invention belongs to the field of injection mold technology, and specifically relates to an injection mold that is easy to demold. Background Technology

[0002] Injection molding is a method of industrial product manufacturing. Products are typically made using rubber or plastic injection molding. Injection molding involves using plastic molds to create various shapes of plastic products from thermoplastic or thermosetting materials, primarily through injection molding machines and molds. The injection mold is a key tool in the injection molding process, determining the shape, size, and surface quality of the final plastic product. Existing injection molds are time-consuming and labor-intensive during demolding, cannot achieve stable demolding, and are prone to damaging the molded parts, affecting the yield rate and reducing mold efficiency.

[0003] The existing Chinese patent document with publication number CN113071072A proposes to solve the above problems by using a processing device and a displacement device to work together to shape and demold the injection molded part, and then using a cooling device to cool the inside of the mold to facilitate demolding. However, the main demolding action of the displacement device is to move the moving mold to demold, but it is not convenient to demold the injection molded part from the fixed mold.

[0004] Therefore, this invention proposes an injection mold that facilitates demolding, solving the problem in the prior art where the moving mold is moved by a displacement device for demolding, but demolding between the injection molded workpiece and the fixed mold is not convenient. The invention improves the moving mold and the fixed mold by setting a water-cooling component inside the fixed mold to accelerate the cooling speed of the injection mold and adding a water pressure ejection component to eject the molded workpiece using water pressure, thereby achieving the purpose of rapid demolding. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an injection mold that is easy to demold, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an injection mold that is easy to demold, comprising a mold base, a fixed mold fixedly mounted on the upper surface of the mold base, a movable mold disposed above the fixed mold, a molding cavity disposed above the interior of the fixed mold, and a cooling assembly disposed below the interior of the fixed mold.

[0007] Preferably, a forming mold is fixedly installed on the lower surface of the moving mold, the position of the forming mold is adapted to the position of the forming cavity, guide posts are symmetrically fixedly installed around the lower surface of the moving mold, guide holes adapted to the guide posts are provided around the inner wall of the fixed mold, injection tubes are symmetrically arranged on both sides of the inner wall of the fixed mold, an overflow tube is provided in the middle of the inner wall of the fixed mold, and mounting holes adapted to the injection tubes and overflow tubes are opened on the inner wall of the moving mold.

[0008] Preferably, the cooling assembly includes a lower cooling chamber, inside which a mixing guide plate is disposed, the mixing guide plates being staggered, and side cooling chambers symmetrically disposed on both sides of the lower cooling chamber, the lower part of the side cooling chamber communicating with the lower part of the lower cooling chamber, a water inlet pipe fixedly installed on the upper part of one side inner wall of the fixed mold, a water outlet pipe fixedly installed on the lower part of the other side inner wall of the fixed mold, and short sealing strips symmetrically disposed on both sides of the molding cavity.

[0009] Preferably, the inner wall of the fixed mold near the water inlet pipe is provided with a water inlet cavity, and the inner wall of the fixed mold near the water outlet pipe is provided with a water outlet cavity, and the water inlet cavity and the water outlet cavity are both connected to the side cooling cavity.

[0010] Preferably, water pressure ejector pipes are symmetrically distributed on both sides of the lower cooling chamber, and a switch box is fixedly installed at the lower part of the side cooling chamber. A connecting pipe is fixedly installed on the inner wall of the water pressure ejector pipe near the switch box. The connecting pipe passes through the side wall of the switch box, and a connecting pipe sealing plug adapted to the connecting pipe is hinged to the inner surface of the switch box.

[0011] Preferably, a sealing ejection diaphragm is fixedly installed inside the water pressure ejection pipe, a sealing ring is fixedly installed on the upper part of the inside of the water pressure ejection pipe, a movable short rod is slidably installed in the middle of the sealing ring, a return spring is fixedly installed on the lower surface of the sealing ring, the lower end of the return spring is fixedly connected to the bottom upper surface of the movable short rod, and an ejection pin is fixedly installed on the top of the movable short rod, the top of the ejection pin penetrating the bottom of the molding cavity.

[0012] Preferably, a squeeze plug is movably installed inside the switch box. The side surface of the squeeze plug is in contact with the side surface of the connecting pipe sealing plug. A water flow groove is provided on the other inner wall of the squeeze plug. A sealing block is provided above the water flow groove. An ejector spring is fixedly installed on the upper surface of the sealing block.

[0013] Preferably, the sealing block is fixedly installed on the surface of the side cooling chamber, the upper surface of the extrusion plug is fixedly installed with an ejector engagement plate, and the upper end of the ejector spring is fixedly connected to the lower surface of the ejector engagement plate.

[0014] Preferably, the molding die is symmetrically hinged with upper engagement plates on both sides, a long sealing strip is slidably installed on the outer side of the upper engagement plates, and a spring is fixedly installed above the long sealing strip.

[0015] Preferably, the lower surface of the moving mold is provided with a movable groove that is adapted to the upper biting plate and the long sealing strip, and the upper end of the spring piece is fixedly connected to the surface of the movable groove.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] By setting a cooling component below the fixed mold, water is used to circulate in the lower and side cooling chambers to achieve rapid and uniform cooling of the injection mold inside the molding cavity. Then, the moving mold is disassembled, and the ejector plate is forced to rise under the elastic push of the ejector spring, which drives the extrusion plug to move upward. At this time, the connecting pipe sealing plug can be opened, and water will enter the water pressure ejection pipe through the connecting pipe, causing the water pressure inside the water pressure ejection pipe to rise. The sealing ejection diaphragm is pushed up and expands, causing the movable short rod to rise. The ejection pin will push the workpiece out of the molding cavity, achieving easy demolding. This solves the problem in the existing technology where the moving mold is moved and demolded by a displacement device, but demolding between the injection molded workpiece and the fixed mold is inconvenient. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the mold separation structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the mold structure after installation according to the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the moving mold after disassembly according to the present invention.

[0021] Figure 4 This is a top-view structural diagram of the moving mold of the present invention after disassembly.

[0022] Figure 5 This is a schematic cross-sectional view of the mold after installation according to the present invention.

[0023] Figure 6 For the present invention Figure 5 A magnified structural diagram at point A.

[0024] Figure 7 This is a schematic cross-sectional view of the switch box after the mold of the present invention is installed.

[0025] Figure 8 For the present invention Figure 7 Schematic diagram of the structure at point B.

[0026] Figure 9 This is a schematic diagram of the cross-sectional structure of the moving mold after disassembly according to the present invention.

[0027] Figure 10 For the present invention Figure 9 A schematic diagram of the structure at point C.

[0028] Figure 11 For the present invention Figure 9 A schematic diagram of the structure at point D.

[0029] Figure 12 This is a schematic diagram of the disassembly structure of the fixed mold of the present invention.

[0030] Figure 13 This is a top view of the disassembled mold structure of the present invention.

[0031] Figure 14 This is a schematic diagram of the overall structure of the switch box and the water pressure outlet pipe of the present invention.

[0032] Figure 15 This is a schematic diagram of a single-sided structure connecting the switch box and the water pressure outlet pipe of the present invention.

[0033] In the diagram: 1. Mold base; 2. Fixed mold; 21. Guide hole; 22. Molding cavity; 23. Injection tube; 24. Overflow tube; 25. Water inlet pipe; 26. Water outlet pipe; 27. Short sealing strip; 3. Moving mold; 31. Guide pillar; 32. Molding mold; 321. Upper interlocking plate; 322. Long sealing strip; 323. Spring; 3221. Movable extrusion block; 4. Cooling assembly; 41. Lower cooling cavity; 411. Mixing guide plate; 42. Side cooling cavity; 3. Water pressure ejection pipe; 431. Connecting pipe; 432. Sealing ejection diaphragm; 433. Sealing ring; 4331. Return spring; 434. Movable short rod; 4341. Ejection needle; 44. Switch box; 441. Compression plug; 4411. Water channel; 4412. Blocking block; 4413. Ejection spring; 442. Ejection engagement plate; 4421. Guide plate; 4422. Compression inclined plate; 45. Connecting pipe sealing plug; 46. Water inlet chamber; 47. Water outlet chamber. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit 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.

[0035] Example 1

[0036] Please see Figures 1 to 15This invention provides a technical solution: an injection mold for easy demolding, comprising a mold base 1, a fixed mold 2 fixedly mounted on the upper surface of the mold base 1, a movable mold 3 disposed above the fixed mold 2, a molding cavity 22 disposed on the upper part of the interior of the fixed mold 2, a cooling assembly 4 disposed on the lower part of the interior of the fixed mold 2, a molding mold 32 fixedly mounted on the lower surface of the movable mold 3, the position of the molding mold 32 being adapted to the position of the molding cavity 22, guide pillars 31 symmetrically fixedly mounted around the lower surface of the movable mold 3, guide holes 21 adapted to the guide pillars 31 being disposed around the inner wall of the fixed mold 2, injection tubes 23 symmetrically disposed on both sides of the inner wall of the fixed mold 2, an overflow tube 24 disposed in the middle of the inner wall of the fixed mold 2, and an opening in the inner wall of the movable mold 3 for the injection tubes 23 symmetrically disposed on both sides of the inner wall of the fixed mold 2. The plastic tube 23 and the overflow tube 24 have matching mounting holes. The cooling assembly 4 includes a lower cooling chamber 41. A mixing guide plate 411 is provided inside the lower cooling chamber 41. The mixing guide plates 411 are staggered. Side cooling chambers 42 are symmetrically arranged on both sides of the lower cooling chamber 41. The lower part of the side cooling chambers 42 is connected to the lower part of the lower cooling chamber 41. A water inlet pipe 25 is fixedly installed on the upper part of one side of the inner wall of the fixed mold 2. A water outlet pipe 26 is fixedly installed on the lower part of the other side of the inner wall of the fixed mold 2. Short sealing strips 27 are symmetrically arranged on both sides of the molding cavity 22. A water inlet chamber 46 is provided on the inner wall of the fixed mold 2 near the water inlet pipe 25. A water outlet chamber 47 is provided on the inner wall of the mold 2 near the water outlet pipe 26. Both the water inlet chamber 46 and the water outlet chamber 47 are connected to the side cooling chambers 42.

[0037] In this embodiment, it should be noted that the branch pipes of injection tube 23 and overflow tube 24 both penetrate the side wall of molding cavity 22. The branch pipe of overflow tube 24 is located above the branch pipe of injection tube 23. Injection tube 23 is symmetrically arranged on both sides of overflow tube 24. When installing the mold, the guide post 31 is inserted into the guide hole 21 for limiting and guiding. At this time, the fixed mold 2 and the moving mold 3 are assembled. The injection tube 23 is connected to the injection tube for injection molding. Liquid is injected into the molding cavity 22 from both sides through the branch pipe of injection tube 23. Under the cooperation of molding cavity 22 and molding mold 32, the molding process is completed. During injection molding, excess liquid overflows and is recycled from the branch pipe of the overflow pipe 24 above, avoiding quality problems caused by overflow. After injection molding, the inlet pipe 25 and outlet pipe 26 are connected to the water pipe. After opening the valve, the cooling water enters the side cooling chamber 42 through the inlet chamber 46, and then enters the lower cooling chamber 41 through the side cooling chamber 42. The mixing guide plates 411 are staggered to make the water flow and mixing more uniform, so that the molding cavity 22 is cooled evenly, which facilitates demolding. After cooling, the water is discharged through the outlet chamber 47 and finally through the outlet pipe 26.

[0038] Example 2

[0039] Please see Figures 1 to 15Based on Embodiment 1, this embodiment further proposes that water pressure ejection pipes 43 are symmetrically distributed on both sides of the interior of the lower cooling chamber 41, and a switch box 44 is fixedly installed in the lower part of the interior of the side cooling chamber 42. A connecting pipe 431 is fixedly installed on the inner wall of the water pressure ejection pipe 43 near the switch box 44. The connecting pipe 431 penetrates the side wall of the switch box 44. A connecting pipe sealing plug 45 adapted to the connecting pipe 431 is hinged to the inner surface of the switch box 44. A sealing ejection diaphragm 432 is fixedly installed inside the water pressure ejection pipe 43. A sealing ring 433 is fixedly installed on the upper part of the interior of the water pressure ejection pipe 43. A movable short rod 434 is slidably installed in the middle of the sealing ring 433. A return spring 4331 is fixedly installed on the lower surface of the sealing ring 433. The lower end of the return spring 4331 is connected to the movable short rod 434. The bottom upper surface of the movable short rod 434 is fixedly connected, and the top of the movable short rod 434 is fixedly installed with an ejector pin 4341. The top of the ejector pin 4341 penetrates the bottom of the molding cavity 22. The inside of the switch box 44 is movably installed with a compression plug 441. The side surface of the compression plug 441 contacts the side surface of the connecting pipe sealing plug 45. The other inner wall of the compression plug 441 is provided with a water channel 4411. A sealing block 4412 is provided above the water channel 4411. An ejector spring 4413 is fixedly installed on the upper surface of the sealing block 4412. The sealing block 4412 is fixedly installed on the surface of the side cooling cavity 42. An ejector bite plate 442 is fixedly installed on the upper surface of the compression plug 441. The upper end of the ejector spring 4413 is fixedly connected to the lower surface of the ejector bite plate 442.

[0040] In this embodiment, after the water circulation cooling process has lasted for a period of time, the valve of the water outlet pipe 26 is closed, the moving mold 3 is disassembled, and the ejector engagement plate 442 is forced to rise under the elastic push of the ejector spring 4413, causing the extrusion plug 441 to move upward. At this time, the connecting pipe sealing plug 45 can be opened, and water will enter the water pressure ejection pipe 43 through the connecting pipe 431, causing the water pressure inside the water pressure ejection pipe 43 to rise. The sealing ejection diaphragm 432 is pushed up and expands, causing the movable short rod 434 to rise. The ejection pin 4341 will eject the workpiece inside the molding cavity 22, achieving easy demolding. It is worth noting that when the extrusion plug 441 blocks the connecting pipe sealing plug 45, the water channel 4411 can... Water flows through the lower cooling chamber 41 and the side cooling chamber 42. However, once the extrusion plug 441 rises, the water channel 4411 will be blocked by the sealing block 4412. At this time, the water flow is accelerated and flows into the water pressure ejection pipe 43 through the connecting pipe sealing plug 45. After demolding, the valve of the water inlet pipe 25 is closed and the valve of the water outlet pipe 26 is opened to discharge some water and reduce the water pressure. At this time, the return spring 4331 will rebound and drive the movable short rod 434 to reset. When the moving mold 3 is installed again, the upper end of the ejection biting plate 442 is pressed by the passive mold 3, so that the extrusion plug 441 is re-locked into the switch box 44. At this time, the connecting pipe sealing plug 45 is re-closed, which facilitates the injection molding of the molding cavity 22.

[0041] Example 3

[0042] Please see Figures 1 to 15 Based on Embodiment 2, this embodiment further proposes that water guides are evenly distributed in the middle of the ejector bite plate 442, a guide plate 4421 is hinged below the water guides, an extrusion inclined plate 4422 is provided above the guide plate 4421, the extrusion inclined plate 4422 is fixedly installed on the surface of the side cooling cavity 42, and a water guide groove is provided on the lower inner wall of the ejector bite plate 442 near the connecting pipe sealing plug 45.

[0043] In this embodiment, the water guide port in the middle of the ejector bite plate 442 allows water to flow not only through the water channel 4411 during cooling but also above the ejector bite plate 442, achieving uniform water flow between the upper and lower layers. This facilitates uniform and rapid cooling and molding in the molding cavity 22. When the extrusion plug 441 is in the closed state of the connecting pipe sealing plug 45, the guide plate 4421 guides the water flow at the water guide port, allowing the water flow to flow between the mixing guide plates 411. When the ejector bite plate 442 is raised, the extrusion inclined plate 4422 will squeeze the guide plate 4421, compressing it. With the water channel 4411 closed, most of the water flow will flow through the water guide port in the middle of the side cooling cavity 42, along the guide plate 4421, into the switch box 44, accelerating the water flow through the connecting pipe 431 into the water pressure ejector pipe 43.

[0044] Example 4

[0045] Please see Figures 1 to 15 Based on Embodiment 3, this embodiment further proposes that upper biting plates 321 are symmetrically hinged on both sides of the molding mold 32, a long sealing strip 322 is slidably installed on the outer side of the upper biting plate 321, a spring piece 323 is fixedly installed above the long sealing strip 322, and an movable groove adapted to the upper biting plate 321 and the long sealing strip 322 is opened on the lower surface of the moving mold 3, and the upper end of the spring piece 323 is fixedly connected to the surface of the movable groove.

[0046] In this embodiment, the long sealing strip 322 and the short sealing strip 27 are vertically distributed. The two ends of the long sealing strip 322 are respectively provided with movable extrusion blocks 3221, and the two ends of the short sealing strip 27 are respectively provided with locking holes adapted to the movable extrusion blocks 3221. When the moving mold 3 and the fixed mold 2 are installed, the upper end of the ejector biting plate 442 will bite with the inner side of the upper biting plate 321. A sealing rubber round strip is provided on the lower inner side of the upper biting plate 321, which tightly bites with the upper surface of the fixed mold 2. In addition, the upper biting plate 321 also pushes the long sealing strip 322 down, so that the movable extrusion blocks 3221 are inserted into the locking holes of the short sealing strip 27. This not only compresses and reinforces the biting state of the molding mold 32 and the ejector biting plate 442, but also forms a square full-enclosed sealing ring above the fixed mold 2 in cooperation with the short sealing strip 27, so that the sealing effect of the fixed mold 2 and the moving mold 3 is better during injection molding.

[0047] Example 5

[0048] Please see Figures 1 to 15 Based on Example 4, this example also proposes a method for using an injection mold that facilitates demolding, including the following steps:

[0049] Step 1: Install the mold, insert the guide post 31 into the guide hole 21 for limiting and guiding, complete the assembly of the fixed mold 2 and the moving mold 3, and connect the injection tube 23 to the injection tube for injection molding.

[0050] Step 2, injection molding: the liquid is injected into the molding cavity 22 from both sides through the branch pipe of the injection tube 23. The molding cavity 22 and the molding mold 32 cooperate to perform injection molding. Excess liquid will overflow and be recycled from the branch pipe of the overflow tube 24 above.

[0051] Step 3: After injection molding, cooling is performed. The inlet pipe 25 and outlet pipe 26 are connected to the water pipe. After opening the valve, the cooling water enters the side cooling chamber 42 through the inlet chamber 46, and then enters the lower cooling chamber 41 through the side cooling chamber 42. The mixing guide plates 411 are staggered to make the water flow and mixing more uniform, so that the molding cavity 22 is cooled evenly.

[0052] Step 4: Demolding. After a period of water circulation cooling, close the valve of the water outlet pipe 26 and disassemble the moving mold 3. The ejector plate 442 is forced to rise under the elastic push of the ejector spring 4413, causing the extrusion plug 441 to move upward. At this time, the connecting pipe sealing plug 45 opens, and water enters the water pressure ejection pipe 43 through the connecting pipe 431, causing the water pressure inside the water pressure ejection pipe 43 to rise. The sealing ejection diaphragm 432 is pushed up and expands, causing the movable short rod 434 to rise. The ejector pin 4341 will push the workpiece out of the molding cavity 22, completing the demolding. After demolding, close the valve of the water inlet pipe 25 and open the valve of the water outlet pipe 26 to discharge some water and reduce the water pressure. At this time, the return spring 4331 will rebound and drive the movable short rod 434 to return to its original position.

[0053] Step 5: Install the moving mold 3 again, push out the upper end of the bite plate 442 and press the passive mold 3 to make the extrusion plug 441 re-clamp into the switch box 44. At this time, the connecting pipe sealing plug 45 re-closes, and repeat step 1.

[0054] 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. An injection mold for easy demolding, comprising a mold base (1), characterized in that: A fixed mold (2) is fixedly installed on the upper surface of the mold base (1). A movable mold (3) is arranged above the fixed mold (2). A forming cavity (22) is arranged above the interior of the fixed mold (2). A cooling assembly (4) is arranged below the interior of the fixed mold (2). The cooling assembly (4) includes a lower cooling cavity (41). A mixing guide plate (411) is arranged inside the lower cooling cavity (41). The mixing guide plates (411) are staggered. Side cooling cavities (42) are symmetrically arranged on both sides of the lower cooling cavity (41). The lower part of the side cooling chamber (42) is connected to the lower part of the lower cooling chamber (41). Water pressure ejection pipes (43) are symmetrically distributed on both sides of the interior of the lower cooling chamber (41). A switch box (44) is fixedly installed in the lower part of the interior of the side cooling chamber (42). A connecting pipe (431) is fixedly installed on the inner wall of the side of the water pressure ejection pipe (43) near the switch box (44). The connecting pipe (431) penetrates the side wall of the switch box (44). A connecting pipe adapted to the connecting pipe (431) is hinged to the inner surface of the switch box (44). A sealing plug (45) is provided. A sealing ejection diaphragm (432) is fixedly installed inside the water pressure ejection pipe (43). A sealing ring (433) is fixedly installed on the upper part of the inside of the water pressure ejection pipe (43). A movable short rod (434) is slidably installed in the middle of the sealing ring (433). A return spring (4331) is fixedly installed on the lower surface of the sealing ring (433). The lower end of the return spring (4331) is fixedly connected to the bottom upper surface of the movable short rod (434). An ejection device is fixedly installed on the top of the movable short rod (434). The top of the ejector pin (4341) penetrates the bottom of the molding cavity (22). The inside of the switch box (44) is movably installed with a compression plug (441). The side surface of the compression plug (441) is in contact with the side surface of the connecting pipe sealing plug (45). The other inner wall of the compression plug (441) is provided with a water channel (4411). A sealing block (4412) is provided above the water channel (4411). An ejector spring (4413) is fixedly installed on the upper surface of the sealing block (4412).

2. The injection mold for easy demolding according to claim 1, characterized in that: A molding mold (32) is fixedly installed on the lower surface of the moving mold (3). The position of the molding mold (32) is adapted to the position of the molding cavity (22). Guide pillars (31) are symmetrically fixedly installed around the lower surface of the moving mold (3). Guide holes (21) adapted to the guide pillars (31) are provided around the inner wall of the fixed mold (2). Injection tubes (23) are symmetrically arranged on both sides of the inner wall of the fixed mold (2). An overflow tube (24) is provided in the middle of the inner wall of the fixed mold (2). The inner wall of the moving mold (3) is provided with mounting holes adapted to the injection tubes (23) and the overflow tubes (24).

3. The injection mold for easy demolding according to claim 1, characterized in that: A water inlet pipe (25) is fixedly installed on the upper part of one side of the inner wall of the fixed mold (2), and a water outlet pipe (26) is fixedly installed on the lower part of the other side of the inner wall of the fixed mold (2). Short sealing strips (27) are symmetrically arranged on both sides of the molding cavity (22).

4. The injection mold for easy demolding according to claim 1, characterized in that: The fixed mold (2) has an inlet cavity (46) on the inner wall near the inlet pipe (25) and an outlet cavity (47) on the inner wall near the outlet pipe (26). The inlet cavity (46) and the outlet cavity (47) are both connected to the side cooling cavity (42).

5. The injection mold for easy demolding according to claim 1, characterized in that: The sealing block (4412) is fixedly installed on the surface of the side cooling chamber (42), and the upper surface of the compression plug (441) is fixedly installed with an ejector bite plate (442). The upper end of the ejector spring (4413) is fixedly connected to the lower surface of the ejector bite plate (442).

6. The injection mold for easy demolding according to claim 2, characterized in that: The molding die (32) is symmetrically hinged with upper biting plates (321) on both sides. A long sealing strip (322) is slidably installed on the outer side of the upper biting plate (321). A spring piece (323) is fixedly installed above the long sealing strip (322).

7. The injection mold for easy demolding according to claim 6, characterized in that: The lower surface of the moving mold (3) is provided with a movable groove that is compatible with the upper biting plate (321) and the long sealing strip (322), and the upper end of the spring piece (323) is fixedly connected to the surface of the movable groove.

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