Injection mold convenient to demold

Abstract

The utility model provides an injection mold convenient to demold. The injection mold comprises a movable mold and a movable mold, the fixed mold is arranged below the movable mold, a mold cavity used for molding a plastic product is formed between the fixed mold and the movable mold, and the mold cavity is provided with a first cavity inner wall; a pitched roof is arranged on one side, deviating from the movable mold, of the fixed mold, a top block is arranged at one end, facing the cavity, of the pitched roof, at least part of the top block extends into the cavity, and the pitched roof can push the top block to move up and down in the inclined direction relative to the cavity; a groove part is arranged on the wall surface, deviating from the inner wall of the first cavity, of the top block to form a first inverted buckling part of the plastic product; the side pushing mechanism comprises a side pushing rod, a side pushing plate and a transmission assembly, the side pushing rod horizontally penetrates into the cavity from the inner wall of the first cavity, the side pushing plate is connected to the end, penetrating into the cavity, of the side pushing rod, and the transmission assembly is located at the end, penetrating out of the cavity, of the side pushing rod; and when the movable mold is relatively close to / away from the fixed mold, the movable mold can drive the side push rod to extend out of / into the cavity through the transmission assembly, so that the plate surface, facing the inner wall of the first cavity, of the side push plate is attached to / away from the inner wall of the first cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and in particular relates to an injection mold which is easy to demould. Background Art

[0002] An injection mold is a tool for producing plastic products. It can give plastic products a complete structure and precise size. Generally, when using an injection mold to form a plastic product, the melted rubber is injected into the mold cavity. After cooling and solidification, the mold is opened to obtain the desired plastic product.

[0003] As the requirements for the shape, size and precision of plastic products continue to increase, the structure of the injection mold is becoming more and more complex, especially for the undercut processing part, which requires the design of complex mechanical movements to achieve. Generally, the undercut part of the plastic product will be solved with the help of the inclined top in the mold, even if the undercut structure of the plastic product is formed in the inclined top during the injection molding process, and then the inclined top is used to push and demold during the demolding process. In the process of the plastic product being pushed by the inclined top after being molded, due to the existence of the undercut structure, it is also subjected to a certain force in the horizontal direction, but there is no auxiliary pushing structure in the horizontal direction. The plastic product is directly exposed to the push of the inclined top, which is not conducive to the rapid separation of the plastic product from the top of the inclined top, and the mold sticking phenomenon occurs; in addition, since the movable mold and the side of the plastic product facing away from the fixed mold are in direct full-area contact, the plastic product is also prone to sticking to the movable mold during the process of the movable mold being relatively far away from the fixed mold. This is not conducive to the demolding efficiency of the plastic product, and the sticking mold is also easy to cause damage to the mold. Utility Model Content

[0004] In view of the above problems existing in the prior art, the main purpose of the utility model is to provide an injection mold that is easy to demold. The provided injection mold that is easy to demold has an ingenious structure and can effectively solve the bonding problem between the plastic product and the mold, which is conducive to improving the demolding efficiency.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] The utility model provides an injection mold that is easy to demould, and the injection mold that is easy to demould comprises:

[0007] Moving model;

[0008] A fixed mold, the fixed mold is arranged below the movable mold, and a cavity for molding a plastic product is formed between the fixed mold and the movable mold, the cavity having a first cavity inner wall;

[0009] An inclined top is arranged on a side of the fixed mold away from the movable mold, and an ejector block is arranged at one end of the inclined top facing the mold cavity, at least a portion of the ejector block extends into the mold cavity, and the inclined top can push the ejector block to move obliquely upward and downward relative to the mold cavity; a groove is arranged on a wall surface of the ejector block away from the inner wall of the first cavity to form a first undercut portion of the plastic product;

[0010] The side push mechanism comprises a side push rod, a side push plate and a transmission assembly. The side push rod horizontally penetrates into the cavity from the inner wall of the first cavity. The side push plate is connected to one end of the side push rod penetrating into the cavity. The transmission assembly is located at one end of the side push rod penetrating out of the cavity. When the movable mold is relatively close to / far away from the fixed mold, the movable mold can drive the side push rod to extend out / into the cavity through the transmission assembly, so that the plate surface of the side push plate facing the inner wall of the first cavity is in contact with / separated from the inner wall of the first cavity.

[0011] As a further description of the above technical solution, the transmission assembly includes a pressure rod, a first magnetic attraction portion, a second magnetic attraction portion, a first damping member and a second damping member; wherein,

[0012] The pressure rod is arranged in the vertical direction, and its lower end is elastically connected to the fixed mold through the first damping member, the first magnetic attraction portion is arranged at the middle of one side of the pressure rod facing the cavity, and the second magnetic attraction portion is arranged at one end of the side push rod away from the cavity; the first magnetic attraction portion and the second magnetic attraction portion have a preset distance in the horizontal direction and have different magnetic poles;

[0013] The second damping member is connected between an end of the side push rod facing away from the cavity and an outer wall of the cavity.

[0014] As a further description of the above technical solution, the lower mold surface of the movable mold is recessed upward with a yield portion. When the plate surface of the side push plate facing the inner wall of the first cavity is in contact with the inner wall of the first cavity, the side push plate is higher than the plate body of the fixed mold and at least partially fits in the yield portion with a clearance.

[0015] As a further description of the above technical solution, the inner wall of the first cavity is recessed outward in a horizontal direction to form an accommodating portion for accommodating the side push plate, and the depth of the accommodating portion is equal to the thickness of the side push plate.

[0016] As a further description of the above technical solution, a guide portion is further provided at the lower end of the pressure rod, and the guide portion is slidably connected to the fixed mold in the vertical direction.

[0017] As a further description of the above technical solution, the mold cavity further includes a second cavity inner wall opposite to the first cavity inner wall, and the second cavity inner wall is located between the first cavity inner wall and the inclined top in the horizontal direction;

[0018] A forming rod is provided below the side push rod. The forming rod is driven by the pressure rod and the third damping member and can be movably penetrated in the cavity between the inner wall of the first cavity and the inner wall of the second cavity in the horizontal direction to form the second undercut portion of the plastic product.

[0019] As a further description of the above technical solution, one end of the molding rod passing through the inner wall of the first cavity is elastically connected to the outer wall of the cavity through the third damping member;

[0020] Part of the lower end of the pressure rod can abut against one end of the forming rod that passes through the inner wall of the first cavity.

[0021] As a further description of the above technical solution, a top plate is provided on a side of the fixed mold away from the movable mold, and the top plate can move in a vertical direction relative to the fixed mold;

[0022] One end of the inclined top away from the mold cavity is slidably connected to the upper plate surface of the top plate in a horizontal direction through a slide seat;

[0023] An ejector pin is also provided on the upper plate surface of the ejector plate and penetrates the fixed mold in a vertical direction and is connected to the cavity.

[0024] As a further description of the above technical solution, one end of the inclined top facing away from the cavity is rotatably connected to the slide seat; and one end of the inclined top facing the cavity is rotatably connected to the ejector block.

[0025] As a further description of the above technical solution, a receiving cavity is provided on the side of the movable mold facing the cavity, and a demolding rod is elastically connected to the side of the receiving cavity facing the cavity through a fourth damping member; at least part of the demolding rod extends out of the receiving cavity.

[0026] By means of the above technical solution, the outstanding effects of the utility model are:

[0027] The utility model provides an injection mold for easy demoulding, in which a side push mechanism is added to the original structure of the movable mold, the fixed mold and the inclined top. In the added side push mechanism, a side push rod horizontally penetrates into the mold cavity from the inner wall of the first cavity, a side push plate is connected to one end of the side push rod penetrating into the mold cavity, a transmission component is located at one end of the side push rod penetrating out of the mold cavity, and in the process of the movable mold moving downward and gradually approaching the fixed mold and closing the mold with it, the movable mold can drive the side push rod to extend out of the mold cavity through the transmission component, so that the plate surface of the side push plate facing the inner wall of the first cavity is aligned with the inner wall of the first cavity The movable mold is in contact with the inner wall of the first cavity, so that the plate surface of the side push plate facing away from the inner wall of the first cavity and the rest of the inner wall of the first cavity are used together to form the outer wall of one side of the plastic product; and when the movable mold moves upward and gradually moves away from the fixed mold to open the mold with it, the movable mold drives the side push rod to extend into the cavity through the transmission component, so that the plate surface of the side push plate facing the inner wall of the first cavity is separated from the inner wall of the first cavity and pushes the plastic product in the horizontal direction to cooperate with the inclined upward pushing action of the inclined ejector, so that the molded plastic product can be separated from the fixed mold and the inclined ejector (ejector block) more quickly;

[0028] 2. The injection mold for easy demoulding provided by the utility model is provided with a receiving cavity on the side of the movable mold facing the cavity, and the side of the receiving cavity facing the cavity is also elastically connected to a demoulding rod through a fourth damping member. When demoulding, the compressed fourth damping member resets to push the demoulding rod to push the molded plastic product, thereby avoiding the problem of adhesion between the movable mold and the plastic product when opening the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of the movable mold in the embodiment of the utility model;

[0030] Figure 2 This is a structural schematic diagram of a fixed mold in an embodiment of the utility model;

[0031] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0032] Figure 4 This is an overall assembly diagram of an injection mold that is easy to demould in an embodiment of the utility model;

[0033] Figure 5 A cross-sectional view of an injection mold for easy demoulding in an embodiment of the utility model;

[0034] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0035] Description of Figure Numbers:

[0036] 1. Moving mold; 2. Fixed mold; 3. Inner wall of the first cavity; 4. Slanted ejector; 5. Ejector block; 6. Side push rod; 7. Side push plate; 8. Pressure rod; 9. First magnetic attraction portion; 10. Second magnetic attraction portion; 11. First damping member; 12. Second damping member; 13. Displacement portion; 14. Guide portion; 15. Inner wall of the second cavity; 16. Forming rod; 17. Third damping member; 18. Ejector plate; 19. Sliding seat; 20. Ejector pin; 21. Accommodating cavity; 22. Fourth damping member; 23. Demolding rod; 24. Limiting groove; 25. Sliding rod; 26. Glue injection channel. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inside", "outside", "front", "back", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0039] See also Figures 1 to 6 The utility model discloses an injection mold that is easy to demould, and the injection mold that is easy to demould comprises:

[0040] Moving mold 1;

[0041] A fixed mold 2, wherein the fixed mold 2 is disposed below the movable mold 1, and a cavity for molding a plastic product is formed between the fixed mold 2 and the movable mold 1, wherein the cavity has a first cavity inner wall 3;

[0042] An inclined top 4, the inclined top 4 is arranged on a side of the fixed mold 2 away from the movable mold 1, and an ejector block 5 is arranged at one end of the inclined top 4 facing the mold cavity, at least a part of the ejector block 5 extends into the mold cavity, and the inclined top 4 can push the ejector block 5 to move obliquely upward and downward relative to the mold cavity; a groove is arranged on the wall surface of the ejector block 5 away from the inner wall 3 of the first cavity to form a first undercut portion of the plastic product;

[0043] The side push mechanism includes a side push rod 6, a side push plate 7 and a transmission assembly. The side push rod 6 horizontally penetrates into the cavity from the first cavity inner wall 3, the side push plate 7 is connected to one end of the side push rod 6 penetrating into the cavity, and the transmission assembly is located at one end of the side push rod 6 penetrating out of the cavity; when the movable mold 1 is relatively close to / far away from the fixed mold 2, the movable mold 1 can drive the side push rod 6 to extend / extend into the cavity through the transmission assembly, so that the plate surface of the side push plate 7 facing the first cavity inner wall 3 is attached to / separated from the first cavity inner wall 3.

[0044] With the above structure, the inclined ejector 4 is provided with an ejector block 5 at one end facing the cavity, at least part of which can extend into the cavity formed by the movable mold 1 and the fixed mold 2, and a groove is provided on the wall surface of the first cavity inner wall 3 of the cavity away from the movable mold 1. During the process of the movable mold 1 and the fixed mold 2 being molded together, the inclined ejector 4 pushes the ejector block 5 to move obliquely downward relative to the cavity, so that the groove provided on the ejector block 5 is located at the first undercut portion that constitutes a part of the cavity and is used to mold the plastic product. After the plastic product is cooled and formed, during the process of the movable mold 1 being relatively away from the fixed mold 2 and opening the mold, the inclined ejector 4 pushes the ejector block 5 to move obliquely upward relative to the cavity, so as to cooperate with other ejection components (such as ejector pins 20) of the fixed mold 2 to eject the plastic product.

[0045] In the additional side push mechanism, the side push rod 6 horizontally penetrates into the cavity from the first cavity inner wall 3, the side push plate 7 is connected to one end of the side push rod 6 penetrating into the cavity, the transmission assembly is located at one end of the side push rod 6 penetrating out of the cavity, and in the process of the movable mold 1 moving downward and gradually approaching the fixed mold 2 to close the mold with it, the movable mold 1 can drive the side push rod 6 to extend out of the cavity through the transmission assembly, so that the plate surface of the side push plate 7 facing the first cavity inner wall 3 is in contact with the first cavity inner wall 3, so that the side push plate 7 is away from the first cavity inner wall 3. The plate surface of the cavity inner wall 3 and the rest of the first cavity inner wall 3 are used together to form the outer wall of one side of the plastic product; and when the movable mold 1 moves upward and gradually moves away from the fixed mold 2 to open the mold with it, the movable mold 1 drives the side push rod 6 to extend into the cavity through the transmission assembly, so that the side push plate 7 moves toward the plate surface of the first cavity inner wall 3 and separates from the first cavity inner wall 3 to push the plastic product in the horizontal direction to cooperate with the inclined upward pushing action of the inclined ejector 4, so that the molded plastic product can be more quickly separated from the fixed mold 2 and the inclined ejector 4 (elevator block 5).

[0046] See also Figure 2 , Figure 3 , Figure 5 and Figure 6Specifically, in this embodiment, the transmission assembly includes a pressure rod 8, a first magnetic attraction portion 9, a second magnetic attraction portion 10, a first damping member 11 and a second damping member 12; wherein the pressure rod 8 is arranged in the vertical direction, and its lower end is elastically connected to the fixed mold 2 through the first damping member 11, the first magnetic attraction portion 9 is arranged at the middle of the right side of the pressure rod 8, and the second magnetic attraction portion 10 is arranged at the left end of the side push rod 6. Therefore, in the process of the movable mold 1 moving downward and gradually closing with the fixed mold 2, the movable mold 1 will give a downward pressure force to the pressure rod 8, so that the pressure rod 8 squeezes the first damping member 11 connected to it downward and gradually moves downward, and the first damping member 11 can accumulate force. During this process, the first magnetic attraction part 9 gradually approaches the second magnetic attraction part 10 in the vertical direction as the pressure rod 8 moves downward. Since the magnetic poles of the two magnetic attraction parts are different and have a preset distance in the horizontal direction, the two magnetic attraction parts will attract each other when the first magnetic attraction part 9 is in a preset height range, so that the side push rod 6 will be forced to move horizontally to the left, thereby driving the side push plate 7 connected to its right end to move horizontally to the left synchronously until it is in contact with the first cavity inner wall 3 of the cavity. Since the second damping member 12 is connected between the left end of the side push rod 6 and the left outer wall of the cavity, the position of the left outer wall of the cavity is fixed, so the second damping member 12 will be stretched and stored during the left movement of the side push rod 6. At this time, the glue injection channel 26 provided on the movable mold 1 and connected to the mold cavity will be injected into the mold cavity. After the plastic product is cooled and formed, the movable mold 1 can be opened by moving it upward away from the fixed mold 2. During this process, the movable mold 1 no longer applies downward pressure to the pressure rod 8, and the first damping part will reset upward to cause the pressure rod 8 to reset upward synchronously. The first magnetic part 9 will move upward synchronously and away from the second magnetic part 10 in the vertical direction. After it exceeds the preset height range upward, the two magnetic parts will no longer attract each other, and the second damping part will shorten and reset, thereby pulling the side push rod 6 to reset to the right, so that the side push plate 7 connected to its right end pushes the molded plastic product from the left to cooperate with the inclined top 4 to demold the molded plastic product from the fixed mold 2 and the top block 5.

[0047] See also Figures 1 to 3 ,as well as Figure 5 , Figure 6Specifically, in this embodiment, in order to prevent the first magnetic attraction part 9 from moving downward with the pressure rod 8 beyond the preset height range where the two magnetic attraction parts can attract each other during the mold closing process, the second magnetic attraction part 10 and the first magnetic attraction part 9 no longer attract each other or the force of attraction is less than the resistance stored by the elongated second damping part, and the side push rod 6 drives the side push plate 7 to reset to the right, thus affecting the molding of the plastic product, the lower mold surface of the movable mold 1 is recessed upward to form a clearance part 13. The clearance part 13 is in the shape of a long groove, and the side push plate 7 can be fitted therein with clearance. When the plate surface of the side push plate 7 faces the inner wall 3 of the first cavity and is in contact with the inner wall 3 of the first cavity, the upper plate surface of the side push plate 7 will be opposite to the making way portion 13. During the process of the movable mold 1 continuing to move downward to close the mold, the making way portion 13 will move downward synchronously to accommodate more of the side push plate 7. Due to the clearance fit between the side push plate 7 and the side push plate 7, the side push plate 7 will be limited in the horizontal direction, thereby ensuring that the side push plate 7 will not affect the molding of the plastic product.

[0048] See also Figure 5 and Figure 6 Specifically, in this embodiment, the first cavity inner wall 3 is recessed outward in the horizontal direction to form an accommodating portion for accommodating the side push plate 7, and the depth of the accommodating portion is equal to the thickness of the side push plate 7, so that when the side push plate 7 moves to the left with the side push rod 6 until it is in contact with the first cavity inner wall 3, it can be completely accommodated in the accommodating portion, that is, the right plate surface of the side push plate 7 is flush with the wall surface of the first cavity wall except the accommodating portion, thereby not affecting the molding of the original left side of the plastic product, and no trimming is required after demoulding.

[0049] Specifically, in this embodiment, the lower end of the pressure rod 8 is further provided with a guide portion 14, and the guide portion 14 is slidably connected with the fixed mold 2 in the vertical direction, so as to guide the pressure rod 8 during the downward or upward movement of the pressure rod 8, so that the pressure rod 8 will not tilt or deviate. For example, the guide portion 14 is in the shape of a long rod, and the fixed mold 2 is provided with a sliding hole (which has a certain limit length in the vertical direction to ensure the guiding effect), and the guide portion 14 is loosely fitted in the sliding hole, so that the guide portion 14 can slide in the sliding hole synchronously with the upward and downward movement of the pressure rod 8.

[0050] Specifically, in this embodiment, the mold cavity also includes a second cavity inner wall 15 which is opposite to the first cavity inner wall 3, and the second cavity inner wall 15 is located between the first cavity inner wall 3 and the inclined top 4 in the horizontal direction; a molding rod 16 is provided under the side push rod 6, and the molding rod 16 is driven by the pressure rod 8 and the third damping member 17, and is movably provided in the horizontal direction through the mold cavity between the first cavity inner wall 3 and the second cavity inner wall 15, so as to form the second undercut portion of the plastic product. More specifically, the left end of the molding rod 16 passing through the first cavity inner wall 3 is elastically connected to the left outer wall of the cavity through the third damping member 17; the lower end of the pressure rod 8 can be against the end of the molding rod 16 passing through the first cavity inner wall 3, so that when the pressure rod 8 is subjected to the downward pressure given by the movable mold 1, its lower end moves down to the left end of the molding rod 16 and continues to move down, the molding rod 16 will overcome the resistance of the third damping part and be pushed to the right by the pressure rod 8, thereby penetrating into the cavity between the first cavity inner wall 3 and the second cavity inner wall 15, and wait for the second undercut part of the plastic product to be molded after the mold is completely closed. After the mold is opened, the pressure rod 8 moves up, which will first release the pushing force on the molding rod 16, and the third damping member 17 will then reset and reset the molding rod 16 to the left and extend out of the cavity, so as not to interfere with the subsequent pushing and demolding action of the side push plate 7 and the inclined ejector 4 on the plastic product.

[0051] Specifically, in the present embodiment, a top plate 18 which can move in a vertical direction relative to the fixed mold 2 is provided at the bottom of the fixed mold 2, a limiting groove 24 is provided on the upper plate surface of the top plate 18, a sliding rod 25 is horizontally embedded between the left and right groove walls of the limiting groove 24 along the left and right directions, and forms a limiting sliding space with the rear groove wall of the limiting groove 24 for the sliding seat 19 connected to the lower end of the inclined top 4 to slide in the horizontal direction, so that the inclined top 4 is slidably connected to the top plate 18. The upper plate surface of the ejector plate 18 is also provided with an ejector pin 20 which penetrates the fixed mold 2 upward in the vertical direction and is connected to the cavity, so that after the movable mold 1 is opened away from the fixed mold 2, the ejector plate 18 can be pushed by a driving source (such as an electric telescopic rod) so that the ejector plate 18 can move upward relative to the fixed mold 2, so that the inclined ejector 4 slides a certain distance relative to the ejector plate 18 in the horizontal direction, and pushes the ejector block 5 upward, and cooperates with the ejector pin 20 to push the molded plastic product, so that the plastic product can be quickly separated from the fixed mold 2 and the ejector block 5. Preferably, the end of the inclined ejector 4 facing away from the cavity is rotatably connected to the slide 19, and the end of the inclined ejector 4 facing the cavity is rotatably connected to the ejector block 5, so as to ensure that the direction of the ejector block 5 pushing the plastic product remains unchanged.

[0052] See also Figure 1 and Figure 5Specifically, in this embodiment, in order to make the movable mold 1 relatively away from the fixed mold 2 upwards during the mold opening process, the lower mold surface of the movable mold 1 can be quickly separated from the plastic product, the movable mold 1 is provided with two receiving cavities 21 on the side facing the cavity, and the top surface of each receiving cavity 21 is elastically connected to a demolding rod 23 through a fourth damping member 22. After the movable mold 1 and the fixed mold 2 are molded together, the lower end of the demolding rod 23 is pressed against the upper mold surface of the fixed mold 2, and the fourth damping member 22 is compressed and contracted, so that in the process of removing the mold from the movable mold 1, the fourth damping member 22 is elastically reset to push the demolding rod 23 downward, so that the plastic product is separated from the lower mold surface of the movable mold 1, avoiding the adhesion of the plastic product to the movable mold 1. After the movable mold 1 continues to rise to a certain height, and before the fourth damping member 22 is completely elastically reset, it should be understood by those skilled in the art that the fourth damping member 22 will bounce within a certain height range, so that the edge bonded to the plastic product will also be separated.

[0053] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not limited to the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any changes, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An injection mold that is easy to demould, characterized in that: include: Moving model; A fixed mold, the fixed mold is arranged below the movable mold, and a cavity for molding a plastic product is formed between the fixed mold and the movable mold, the cavity having a first cavity inner wall; An inclined top is arranged on a side of the fixed mold away from the movable mold, and an ejector block is arranged at one end of the inclined top facing the mold cavity, at least a portion of the ejector block extends into the mold cavity, and the inclined top can push the ejector block to move obliquely upward and downward relative to the mold cavity; a groove is arranged on a wall surface of the ejector block away from the inner wall of the first cavity to form a first undercut portion of the plastic product; The side push mechanism comprises a side push rod, a side push plate and a transmission assembly. The side push rod horizontally penetrates into the cavity from the inner wall of the first cavity. The side push plate is connected to one end of the side push rod penetrating into the cavity. The transmission assembly is located at one end of the side push rod penetrating out of the cavity. When the movable mold is relatively close to / far away from the fixed mold, the movable mold can drive the side push rod to extend out / into the cavity through the transmission assembly, so that the plate surface of the side push plate facing the inner wall of the first cavity is in contact with / separated from the inner wall of the first cavity.

2. The injection mold for easy demoulding according to claim 1, characterized in that: The transmission assembly includes a pressure rod, a first magnetic attraction portion, a second magnetic attraction portion, a first damping member and a second damping member; wherein, The pressure rod is arranged in the vertical direction, and its lower end is elastically connected to the fixed mold through the first damping member, the first magnetic attraction portion is arranged at the middle of one side of the pressure rod facing the cavity, and the second magnetic attraction portion is arranged at one end of the side push rod away from the cavity; the first magnetic attraction portion and the second magnetic attraction portion have a preset distance in the horizontal direction and have different magnetic poles; The second damping member is connected between an end of the side push rod facing away from the cavity and an outer wall of the cavity.

3. The injection mold for easy demoulding according to claim 2, characterized in that: The lower mold surface of the movable mold is recessed upward to form a relief portion. When the plate surface of the side push plate facing the inner wall of the first cavity is in contact with the inner wall of the first cavity, the side push plate is higher than the plate body of the fixed mold and at least partially fits in the relief portion with clearance.

4. The injection mold for easy demoulding according to claim 2, characterized in that: The inner wall of the first cavity is recessed outwardly in a horizontal direction to form an accommodating portion for accommodating the side push plate, and the depth of the accommodating portion is equal to the thickness of the side push plate.

5. The injection mold for easy demoulding according to claim 2, characterized in that: A guide portion is also provided at the lower end of the pressure rod, and the guide portion is slidably connected with the fixed mold in the vertical direction.

6. The injection mold for easy demoulding according to claim 2, characterized in that: The mold cavity further comprises a second cavity inner wall opposite to the first cavity inner wall, and the second cavity inner wall is located between the first cavity inner wall and the inclined top in the horizontal direction; A forming rod is provided below the side push rod. The forming rod is driven by the pressure rod and the third damping member and can be movably penetrated in the cavity between the inner wall of the first cavity and the inner wall of the second cavity in the horizontal direction to form the second undercut portion of the plastic product.

7. The injection mold for easy demoulding according to claim 6, characterized in that: One end of the molding rod passing through the inner wall of the first cavity is elastically connected to the outer wall of the cavity through the third damping member; Part of the lower end of the pressure rod can abut against one end of the forming rod that passes through the inner wall of the first cavity.

8. The injection mold for easy demoulding according to claim 1, characterized in that: A top plate is provided on a side of the fixed mold away from the movable mold, and the top plate can move in a vertical direction relative to the fixed mold; One end of the inclined top away from the mold cavity is slidably connected to the upper plate surface of the top plate in a horizontal direction through a slide seat; An ejector pin is also provided on the upper plate surface of the ejector plate and penetrates the fixed mold in a vertical direction and is connected to the cavity.

9. The injection mold for easy demoulding according to claim 8, characterized in that: One end of the inclined top facing away from the cavity is rotatably connected to the slide seat; and one end of the inclined top facing the cavity is rotatably connected to the ejector block.

10. The injection mold for easy demoulding according to claim 1, characterized in that: A receiving cavity is provided on one side of the movable mold facing the mold cavity, and a demoulding rod is elastically connected to one side of the demoulding cavity facing the mold cavity through a fourth damping member; at least part of the demoulding rod extends out of the receiving cavity.

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