An injection mold that facilitates demolding

Abstract

This utility model discloses an injection mold that facilitates demolding, comprising: a supporting cavity, which is a cavity with an opening on one side; a punch, which is slidably disposed inside the concave mold; a driving part for driving the punch to move laterally is disposed inside the supporting cavity; a mold core is fixedly connected to the middle of the punch; an ejector rod for demolding is slidably connected inside the mold core; and an air vent is opened on the side wall of one end of the ejector rod. The beneficial effects of this utility model are: after injection molding and cooling, the driving part drives the punch to move laterally and separate from the concave mold; when the ejector rod corresponds to the extrusion tube, the punch stops moving, and the extrusion tube moves towards the ejector rod to extrude, causing the ejector rod to be pushed out from one end of the mold core, thus removing the workpiece. This avoids collision between the workpiece and the concave mold and also solves the problem of inconvenient removal due to limited space.

Description

Technical Field

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

[0002] Injection molds are tools used in injection molding processes to manufacture plastic parts. They are formed by heating and melting plastic, injecting it into a mold, and then allowing it to cool and solidify. During injection molding, when the workpiece is long, it is prone to colliding with the mold's concave cavity during demolding, which can damage the workpiece or prevent it from being demolded smoothly. Excessive demolding force can affect the surface quality of the workpiece, even causing breakage or deformation. Furthermore, when the space is limited, collisions or difficulties in removal during demolding can result in scratches, marks, or other defects on the finished product's surface, affecting its appearance. Utility Model Content

[0003] 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.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an injection mold that facilitates demolding, comprising:

[0005] The supporting cavity is a cavity with an opening on one side;

[0006] A punch is slidably disposed inside a concave mold. A drive unit for driving the punch to move laterally is provided inside the support cavity. A mold core is fixedly connected to the middle of the punch. An ejector rod for demolding is slidably connected inside the mold core. An air vent is provided on the side wall of one end of the ejector rod.

[0007] The separation drive unit is located on one side of the support cavity. The separation drive unit includes a squeezing tube slidably installed in the middle of the support cavity and a hydraulic cylinder 2 for driving the squeezing tube to slide. The squeezing tube is connected to a high-pressure air source for injecting high-pressure air into the push rod.

[0008] A concave mold is placed on one side of the punch, and a mold cavity that mates with the mold core is opened in the middle of the concave mold.

[0009] Preferably, the support cavity is fixedly connected to a plurality of slide rails, and a slide block is slidably connected to the outside of the slide rails, and the slide block is fixedly connected to the punch.

[0010] Preferably, the driving unit is a hydraulic cylinder, which is fixedly connected inside the support cavity, and the output end of the hydraulic cylinder is fixedly connected to the punch.

[0011] Preferably, guide rods are fixedly connected to all four corners of one side of the punch, guide holes that cooperate with the guide rods are opened on one side of the concave die, multiple positioning elements are fixedly connected to one side of the concave die, and multiple positioning holes that cooperate with the positioning elements are fixedly connected to one side of the concave die.

[0012] Preferably, one end of the ejector rod passes through the punch and is fixedly connected to a connecting plate. The connecting plate has air inlets at positions corresponding to the ejector rod. A spring is sleeved on the outer side of the ejector rod between the connecting plate and the punch.

[0013] Preferably, the second hydraulic cylinder is fixed to one side of the support cavity by a bracket, and a hollow plate is fixed to the output end of the second hydraulic cylinder, and the extrusion tube is fixed to the hollow plate.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: After injection molding and cooling, the drive unit drives the punch to move laterally and separate from the concave mold. When the ejector pin corresponds to the extrusion tube, the punch stops moving, and the extrusion tube moves towards the ejector pin to extrude the ejector pin from one end of the mold core, thus removing the workpiece. This avoids collision between the workpiece and the concave mold and also solves the problem of inconvenient removal due to limited space. One end of the ejector pin passes through the punch and is fixedly connected to the connecting plate. The connecting plate has an air inlet hole corresponding to the ejector pin position. A spring is sleeved on the outside of the ejector pin between the connecting plate and the punch. When the extrusion tube corresponds to the ejector pin, the hydraulic cylinder drives the hollow plate to contact the extrusion tube with the connecting plate, and the end of the extrusion tube corresponds to the air inlet hole, which facilitates the injection of high-pressure air into the ejector pin through the extrusion tube. The high-pressure air is blown out to one end along the inclined air outlet hole, assisting in the separation of the workpiece from the mold core. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the mold cavity of this utility model;

[0017] Figure 3 This is a schematic diagram of the supporting cavity of this utility model;

[0018] Figure 4 This is a schematic diagram of the connecting plate of this utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the top rod of this utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the mold core of this utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the hydraulic cylinder 2 of this utility model.

[0022] In the diagram: 1. Concave mold; 2. Mold cavity; 3. Positioning component; 4. Guide rod; 5. Guide hole; 6. Mold core; 7. Ejector rod; 8. Connecting plate; 9. Spring; 10. Air outlet; 11. Punch; 12. Support cavity; 13. Slide rail; 14. Hydraulic cylinder one; 15. Hydraulic cylinder two; 16. Hollow plate; 17. Extrusion tube; 18. Air inlet; 19. Positioning hole. Detailed Implementation

[0023] 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.

[0024] Please see Figure 1 , 2 As shown in Figures 3, 4, 5, 6, and 7, this utility model provides a technical solution: an injection mold that facilitates demolding, comprising: a supporting cavity 12, the supporting cavity 12 being a cavity with an opening on one side; a punch 11 slidably mounted inside a concave mold 1, the top and bottom of the punch 11 being provided with sliding grooves that cooperate with the supporting cavity 12; a driving part for driving the punch 11 to move laterally is provided inside the supporting cavity 12; a mold core 6 is fixedly connected to the middle of the punch 11; an ejector rod 7 for demolding is slidably connected inside the mold core 6; and a side wall of one end of the ejector rod 7 is provided with... There is an air vent 10, which is inclined towards the end of the mold core 6; the separation drive unit is located on one side of the support cavity 12, and the separation drive unit includes an extrusion tube 17 slidably installed in the middle of the support cavity 12 and a hydraulic cylinder 15 for driving the extrusion tube 17 to slide. The extrusion tube 17 is connected to a high-pressure air pump for injecting high-pressure air into the push rod 7; the concave mold 1 is located on one side of the punch 11, and a mold cavity 2 that cooperates with the mold core 6 is opened in the middle of the concave mold 1. A pair of water inlets are fixed to the outside of the concave mold 1, and a hole for conveying cooling water is opened inside the concave mold 1.

[0025] It should be noted that in this embodiment, a controller corresponding to the limit switch is provided. The punch 11 moves inside the support cavity 12 to the position corresponding to the concave mold 1. Then, the support cavity 12 drives the punch 11 to close with the mold cavity 2. After injection molding and cooling, the support cavity 12 drives the punch 11 to separate from the concave mold 1. The cooled molded workpiece and the mold core 6 are brought out from inside the concave mold 1. Then, the drive unit drives the punch 11 to move laterally so that it is misaligned and separated from the concave mold 1. Under the action of the limit switch, when the ejector rod 7 corresponds to the extrusion tube 17, the punch 11 stops moving, and the extrusion tube 17 moves towards the ejector rod 7 to extrude it, so that the ejector rod 7 is ejected from one end of the mold core 6, thereby removing the workpiece and preventing the workpiece from colliding with the concave mold 1 or from being inconvenient to remove due to the narrow space.

[0026] In one embodiment, a plurality of slide rails 13 are fixedly connected inside the support cavity 12, and slide blocks are slidably connected to the outside of the slide rails 13. The slide blocks are fixedly connected to the punch 11. The driving part is a hydraulic cylinder 14, which is fixedly connected inside the support cavity 12. The output end of the hydraulic cylinder 14 is fixedly connected to the punch 11.

[0027] It should be noted that in this embodiment, two limit switches are installed inside the support cavity 12, namely limit switch one and limit switch two, which are used to position the movement position of the punch 11. When the hydraulic cylinder one 14 drives the punch 11 to move along the slide rail 13, when the punch 11 contacts the limit switch one, the position of the punch 11 corresponds to that of the concave diaphragm 1. When the punch 11 contacts the limit switch two, the position of the push rod 7 in the middle of the punch 11 corresponds to that of the extrusion tube 17.

[0028] In one embodiment, guide rods 4 are fixedly connected to all four corners of one side of the punch 11, guide holes 5 that cooperate with the guide rods 4 are opened on one side of the concave dies 1, multiple positioning elements 3 are fixedly connected to one side of the concave dies 1, and multiple positioning holes 19 that cooperate with the positioning elements 3 are fixedly connected to one side of the concave dies 1.

[0029] It should be noted that in this embodiment, when the positions of the punch 11 and the concave mold 1 correspond, the drive support cavity 12 drives the punch 11 and the concave mold 1 to close the mold, so that the guide rod 4 is inserted into the guide hole 5, and the positioning member 3 is a metal rod. The positioning member 3 is inserted into the positioning hole 19 corresponding to the concave mold 1, so as to position the punch 11 and the concave mold 1, so that the mold core 6 and the mold cavity 2 can be precisely matched.

[0030] In one embodiment, one end of the push rod 7 passes through the punch 11 and is fixedly connected to a connecting plate 8. The connecting plate 8 is provided with air inlet holes 18 at the positions corresponding to the push rod 7. A spring 9 is sleeved on the outside of the push rod 7 between the connecting plate 8 and the punch 11. The second hydraulic cylinder 15 is fixedly connected to one side of the support cavity 12 by a bracket. The output end of the second hydraulic cylinder 15 is fixedly connected to a hollow plate 16. The extrusion tube 17 is fixedly connected to the hollow plate 16 and the two are connected. The extrusion tube 17 is connected to a high-pressure air source.

[0031] It should be noted that in this embodiment, when the extrusion tube 17 corresponds to the ejector rod 7, the hydraulic cylinder 15 drives the hollow plate 16 to move towards the support cavity 12. The hollow plate 16 drives the extrusion tube 17 to contact the connecting plate 8. The extrusion tube 17 pushes the ejector rod 7 to one end through the connecting plate 8. During this period, the connecting plate 8 compresses the spring 9, and the end of the extrusion tube 17 corresponds to the air inlet 18, which facilitates the injection of high-pressure air into the ejector rod 7 through the extrusion tube 17. The high-pressure air is blown out to one end along the inclined air outlet 10, which can assist in the separation of the workpiece from the mold core 6.

[0032] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] 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 facilitating demolding, characterized by: include: Support cavity (12), the support cavity (12) is a cavity with an opening on one side; A punch (11) is slidably disposed inside the concave mold (1). The support cavity (12) is provided with a drive unit for driving the punch (11) to move laterally. A mold core (6) is fixedly connected to the middle of the punch (11). A push rod (7) for demolding is slidably connected inside the mold core (6). An air vent (10) is opened on the side wall of one end of the push rod (7). The separation drive unit is located on one side of the support cavity (12). The separation drive unit includes a compression tube (17) slidably installed in the middle of the support cavity (12) and a hydraulic cylinder (15) for driving the compression tube (17) to slide. The compression tube (17) is connected to a high-pressure air source for injecting high-pressure air into the push rod (7). A concave mold (1) is placed on one side of the punch (11), and a mold cavity (2) that mates with the mold core (6) is opened in the middle of the concave mold (1).

2. The injection mold facilitating mold release of claim 1, wherein: The support cavity (12) is fixedly connected to a plurality of slide rails (13), and a slide block is slidably connected to the outside of the slide rails (13), and the slide block is fixedly connected to the punch (11).

3. An injection mold facilitating mold release according to claim 2, characterized in that: The driving unit is a hydraulic cylinder (14), which is fixed inside the support cavity (12). The output end of the hydraulic cylinder (14) is fixedly connected to the punch (11).

4. The injection mold facilitating mold release of claim 1, wherein: The punch (11) has guide rods (4) fixedly connected to each of its four corners. The concave dies (1) have guide holes (5) that cooperate with the guide rods (4) on one side. The concave dies (1) have multiple positioning elements (3) fixedly connected to one side. The concave dies (1) have multiple positioning holes (19) that cooperate with the positioning elements (3) fixedly connected to one side.

5. The injection mold facilitating mold release of claim 1, wherein: One end of the push rod (7) passes through the punch (11) and is fixedly connected to a connecting plate (8). The connecting plate (8) is provided with air inlet holes (18) at the positions corresponding to the push rod (7). A spring (9) is sleeved on the outside of the push rod (7) between the connecting plate (8) and the punch (11).

6. The injection mold facilitating mold release of claim 1, wherein: The second hydraulic cylinder (15) is fixed to one side of the support cavity (12) by a bracket. A hollow plate (16) is fixed to the output end of the second hydraulic cylinder (15), and the extrusion tube (17) is fixed to the hollow plate (16).

Images