Injection mold with automatic demolding function

Abstract

The utility model relates to injection mold technical field discloses a kind of injection mold with automatic demoulding function including fixed mould and movable mould, the side of fixed mould and movable mould mutually away is connected with the connecting seat, movable mould side is slidably provided with guide rod, the guide rod one end is passed through fixed mould, and is connected with the connecting plate, the end of guide rod near connecting plate is connected with reset spring, and the other end of guide rod is connected with the plastic film connecting template and is provided with.The utility model can be connected with injection molding part multidirectionally by setting the connecting mechanism around forming cavity, ensure the connecting effect of injection molding part during demoulding, avoid the phenomenon of mold deformation or wear, ensure the effect of injection molding part separation from mold, then the redundant edge is cut by demoulding cutter head, make mold fall off, and whole step is completed between mold opening and closing, effectively ensure the production efficiency of injection molding part.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold with automatic demolding function. Background Technology

[0002] An injection mold is a type of mold used in the injection molding process. It typically consists of two main parts: a moving mold (male mold) and a fixed mold (female mold). During the injection molding process, molten plastic material is injected into the cavity of the mold, and after cooling and solidification, the desired plastic product is formed.

[0003] Currently, the processing of injection molds has been continuously improved. Not only can the plastic film be cooled directly in the mold after injection, but when processing smaller plastic films, quick demolding can be achieved through ejector pins or movable punches. However, when injection molding larger plastic parts, due to the larger area of ​​the plastic part and the smaller contact area of ​​the ejector pins, it is more difficult to use ejector pins for demolding, which can easily cause deformation or wear of the plastic film. Therefore, an injection mold with automatic demolding function is proposed.

[0004] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Utility Model Content

[0005] The purpose of this invention is to provide an injection mold with an automatic demolding function to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: It includes a fixed mold and a moving mold. Connecting seats are provided on the sides of the fixed mold and the moving mold that are far apart from each other. A guide rod is slidably provided on one side of the moving mold. One end of the guide rod passes through the fixed mold and is connected to a connecting plate. A return spring is sleeved on the end of the guide rod near the connecting plate. A plastic film connecting template is connected to the other end of the guide rod. A die-cutting frame is connected to one side of the fixed mold. A slot is opened on one side of the plastic film connecting template corresponding to the die-cutting frame, and a connecting mechanism is connected inside the slot. A through hole is opened on one side of the moving mold corresponding to the die-cutting frame, and a sealing mechanism is connected inside the through hole.

[0007] The connecting mechanism includes a first mounting cavity formed in a slot. A compression spring is connected to one side of the inner wall of the first mounting cavity, and a plastic film connector is connected to the other end of the compression spring. One end of the plastic film connector extends through into the slot. The windshield mechanism includes a second mounting cavity formed in a through hole. A support spring is connected to one side of the inner wall of the second mounting cavity, and a sealing frame is connected to the other end of the support spring. Magnets are connected to the bottom end of the sealing frame and the side of the second mounting cavity that is close to it. A demolding cutter head is connected to the inner side of the die-cutting frame.

[0008] Preferably, a forming punch is connected to one side of the moving mold, and a forming die is provided on one side of the fixed mold corresponding to the forming punch. The inner side of the plastic film connecting template is spliced ​​with the forming die to form a forming cavity.

[0009] Preferably, the fixed mold has an injection hole at its center and a cooling water channel inside, and a connecting end is provided on the side away from the moving mold.

[0010] Preferably, one end of the die-cutting frame passes through the moving mold and is provided with a beveled rounded corner, and a stop block is provided between it and the inner side of the fixed mold, with one side of the stop block being arc-shaped.

[0011] Preferably, the bottom end of the plastic film connector is tapered and has a connection hole.

[0012] Preferably, both ends of the reset spring are connected to a fixed seat, and the fixed seats are respectively fixed on the side of the connecting plate and the moving mold that are close to each other.

[0013] Preferably, the top of the sealing frame extends into the through hole, and one side is chamfered.

[0014] In summary, this application includes the following beneficial technical effects:

[0015] The connecting mechanism set around the molding cavity can connect with the injection molded part from multiple directions, ensuring the connection effect of the injection molded part during demolding, avoiding mold deformation or wear, and ensuring the separation effect of the injection molded part from the mold. Then, the excess edge is cut by the demolding cutter head, so that the mold can be removed. At the same time, the whole process is completed in the opening and closing of the mold, effectively ensuring the production efficiency of injection molded parts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of an injection mold with automatic demolding function according to the present invention;

[0017] Figure 2 This is a side sectional view of an injection mold with automatic demolding function according to the present invention.

[0018] Figure 3This is a side sectional view of an injection mold with automatic demolding function in the combined state according to this utility model.

[0019] Figure 4 for Figure 2 Enlarged structural diagram of section A;

[0020] Figure 5 This is a schematic diagram of the plastic film connector in an injection mold with automatic demolding function according to the present invention.

[0021] In the diagram: 1. Moving mold; 2. Fixed mold; 3. Connecting seat; 4. Guide rod; 5. Connecting plate; 6. Return spring; 7. Plastic film connecting template; 8. Cutting frame; 81. Stop block; 9. Mounting cavity one; 10. Compression spring; 11. Plastic film connector; 12. Mounting cavity two; 13. Support spring; 14. Sealing frame; 15. Magnet; 16. Demolding cutter head; 17. Forming punch; 18. Forming die; 19. Injection hole; 20. Connecting end; 111. Connecting hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 This utility model provides a technical solution: it includes a fixed mold 1 and a moving mold 2. A forming punch 17 is connected to one side of the moving mold 2, and a forming die 18 is provided on one side of the fixed mold 1 corresponding to the forming punch 17. The inner side of the plastic film connecting template 7 is spliced ​​with the forming die 18 to form a forming cavity. Connecting seats 3 are provided on the sides of the fixed mold 1 and the moving mold 2 that are away from each other. The connecting seat 3 on the side of the moving mold 2 is used to connect with the pushing mechanism of the injection molding equipment, such as a cylinder. A connecting end 20 is provided on the side of the fixed mold 1 that is away from the moving mold 2. The connecting seat 3 and the connecting end 20 on the side of the fixed mold 1 are used to fix the fixed mold 1 on the injection molding equipment. The moving mold 2 is slidably disposed on one side. A guide rod 4 is provided, one end of which passes through the fixed mold 1 and is connected to a connecting plate 5. A return spring 6 is sleeved and connected to the end of the guide rod 4 near the connecting plate 5. A plastic film connecting template 7 is connected to the other end of the guide rod 4. A die-cutting frame 8 is connected to one side of the fixed mold 1. A slot is opened on one side of the plastic film connecting template 7 corresponding to the die-cutting frame 8, and a connecting mechanism is connected inside the slot. A through hole is opened on one side of the moving mold 2 corresponding to the die-cutting frame 8, and a sealing mechanism is connected inside the through hole. The number of connecting mechanisms and sealing mechanisms can be increased or decreased according to the shape of the injection molded part. In this application, they are only used for illustration, and the number is not fixed.

[0024] Reference Figure 3 and Figure 4 As shown, the connecting mechanism includes a mounting cavity 9 opened in the slot. A compression spring 10 is connected to one side of the inner wall of the mounting cavity 9, and a plastic film connector 11 is connected to the other end of the compression spring 10. One end of the plastic film connector 11 extends through into the slot. When the fixed mold 1 and the moving mold 2 are docked, the compression spring 10 pushes out the plastic film connector 11, so that the tapered end of the plastic film connector 11 extends into the molding cavity between the molding punch 17 and the molding die 18. During injection molding, a part of the plastic part will be connected to the plastic film connector 11, which is used to remove the plastic part from between the molding punch 17 and the molding die 18 after the plastic part has cooled. The windproof mechanism includes a mounting cavity 12 opened in the through hole. A support spring 13 is connected to one side of the inner wall of the mounting cavity 12, and a sealing frame 14 is connected to the other end of the support spring 13. The top end of the sealing frame 14 extends into the through hole, and one side is chamfered. The bottom end of the sealing frame 14 Magnets 15 are connected to the side of the mounting cavity 12. During injection molding, the support spring 13 will lift the sealing frame 14 to seal the molding cavity, preventing the molten plastic from overflowing during injection and ensuring the molding effect. A demolding cutter 16 is connected to the inner side of the die cutter 8. As shown in the attached figure, the demolding cutter 16 has two split ends. When the fixed mold 1 and the moving mold 2 separate, the demolding cutter 16 first passes through the sealing frame 14. The inclined surface of 6 abuts against the chamfer on one side of the sealing frame 14. The inclined surface of the demolding cutter head 16 will press down the sealing frame 14 to ensure the demolding cutter head 16 passes through effectively. Then, when passing between the plastic part and the plastic film connector head 11, it will separate the plastic part from the plastic film connector head 11. During demolding, the demolding cutter head 16 will squeeze the tapered end of the plastic film connector head 11, causing the plastic film connector head 11 to move into the mounting cavity 9, thereby disconnecting from the plastic film and completing the demolding.

[0025] Reference Figure 3 As shown, an injection hole 19 is provided at the center of the fixed mold 1 for injection molding of the part, and cooling water channels are provided inside both the fixed mold 1 and the moving mold 2 for cooling the part.

[0026] Reference Figure 2 and Figure 3 As shown, one end of the die cutter 8 passes through the moving mold 2 and is set with a beveled rounded corner. When the fixed mold 1 and the moving mold 2 are combined, the die cutter 8 will re-pass through the through hole. A stop 81 is connected between the die cutter 8 and the inner side of the fixed mold 1. One side of the stop 81 is set with an arc shape, which can further reduce the connection between the injection molded part and the plastic film connector 11, and at the same time facilitate the separation between the injection molded part and the plastic film connector 11 during demolding, which also indirectly reduces resource consumption.

[0027] Reference Figure 5As shown, the bottom end of the plastic film connector 11 is tapered and has a connection hole 111, which allows part of the plastic part to enter the connection hole 111, thereby ensuring the connection effect between the plastic film connector 11 and the injection molded part, and ensuring the separation effect of the plastic part from the molding punch 17 and the molding die 18.

[0028] Reference Figure 1 and Figure 3 As shown, both ends of the return spring 6 are connected to fixed seats, which are respectively fixed on the side of the connecting plate 5 and the moving mold 2 that are close to each other. When the fixed mold 1 and the moving mold 2 separate, the elasticity of the return spring 6 pulls the connecting plate 5, thereby pushing the guide rod 4 to separate the plastic film connecting template 7 from the moving mold 2. After the moving mold 2 moves to a certain distance, the other side of the plastic film connecting template 7 separates from the fixed mold 1, thereby removing the injection molded part from the forming punch 17 and the forming die 18. After the plastic film connecting template 7 separates from the fixed mold 1, the plastic film connecting template 7 drives the injection molded part to approach the demolding cutter head 16 through the plastic film connecting head 11 until the demolding cutter head 16 cuts the injection molded part from one end of the plastic film connecting head 11, thus completing the demolding.

[0029] The implementation principle of this application is as follows: When this utility model is used, the fixed mold 2 is pushed towards the moving mold 1 to merge them. At the same time as merging, the plastic film connecting template 7 in the middle position will also merge. The forming punch 17 and the forming die 18 form the molding cavity of the injection molded part. At the same time, the tapered end of the plastic film connecting head 11 will extend into the molding cavity and be injected through the injection hole 19. The injection molded part is connected to the plastic film connecting head 11 through the connecting hole 111. Then the moving mold 1 and the fixed mold 2 are separated. At the same time as separation, the plastic film connecting template 7 takes the injection molded part out from the forming punch 17 and the forming die 18 through the connecting mechanism. Then it is cut off by the demolding cutter head 16 to complete the demolding of the larger injection molded part.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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 process, method, article, or apparatus.

[0031] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An injection mold with automatic demolding function, comprising a fixed mold (1) and a moving mold (2), characterized in that: A connecting seat (3) is provided on the side of the fixed mold (1) and the moving mold (2) that are far apart from each other. A guide rod (4) is slidably provided on one side of the moving mold (2). One end of the guide rod (4) passes through the fixed mold (1) and is connected to a connecting plate (5). A return spring (6) is sleeved on one end of the guide rod (4) near the connecting plate (5). A plastic film connecting template (7) is connected to the other end of the guide rod (4). A die-cutting frame (8) is connected to one side of the fixed mold (1). A slot is opened on one side of the plastic film connecting template (7) corresponding to the die-cutting frame (8), and a connecting mechanism is connected inside the slot. A through hole is opened on one side of the moving mold (2) corresponding to the die-cutting frame (8), and a sealing mechanism is connected inside the through hole. The connecting mechanism includes a first mounting cavity (9) opened in the slot. A compression spring (10) is connected to one side of the inner wall of the first mounting cavity (9). A plastic film connector (11) is connected to the other end of the compression spring (10). One end of the plastic film connector (11) extends through into the slot. The windshield mechanism includes a second mounting cavity (12) opened in the through hole. A support spring (13) is connected to one side of the inner wall of the second mounting cavity (12). A sealing frame (14) is connected to the other end of the support spring (13). Magnets (15) are connected to the bottom end of the sealing frame (14) and the side of the second mounting cavity (12) that is close to it. A demolding cutter head (16) is connected to the inner side of the die-cutting frame (8).

2. The injection mold with automatic demolding function according to claim 1, characterized in that: The moving mold (2) is connected to a forming punch (17) on one side, and the fixed mold (1) is provided with a forming die (18) on one side corresponding to the forming punch (17). The inner side of the plastic film connecting template (7) is spliced ​​with the forming die (18) to form a forming cavity.

3. The injection mold with automatic demolding function according to claim 2, characterized in that: The fixed mold (1) has an injection hole (19) at its center and a cooling water channel inside. A connecting end (20) is provided on the side away from the moving mold (2).

4. The injection mold with automatic demolding function according to claim 1, characterized in that: One end of the cutting frame (8) passes through the moving mold (2) and is set with a beveled rounded corner. A stop block (81) is connected between the inner side of the fixed mold (1) and the stop block (81) is arc-shaped on one side.

5. An injection mold with automatic demolding function according to claim 1, characterized in that: The bottom end of the plastic film connector (11) is tapered and has a connection hole (111).

6. An injection mold with automatic demolding function according to claim 1, characterized in that: The reset spring (6) is connected to fixed seats at both ends, and the fixed seats are respectively fixed on the side of the connecting plate (5) and the moving mold (2) that are close to each other.

7. An injection mold with automatic demolding function according to claim 1, characterized in that: The top of the sealing frame (14) extends into the through hole, and one side is chamfered.

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