Injection mold for integrally forming front cover and rear cover

Abstract

The utility model discloses an injection mold for integrally forming a front cover and a rear cover, which relates to the technical field of injection molds and comprises a fixed mold and a movable mold, two mold cores are arranged at one end, close to the movable mold, of the fixed mold, cavities corresponding to the mold cores are formed in the movable mold, and a plurality of push rods are arranged in the mold cores. The two ends of the fixed mold and the two ends of the movable mold are each connected with a plurality of cooling liquid conveying pipes, the cooling liquid conveying pipes extend into the fixed mold and the movable mold and are connected with cooling heat absorption pipes, and the cooling heat absorption pipes absorb heat of the mold cores and the mold cavities to cool the molds, so that products are rapidly cooled and formed. The lower end of the driving shaft extends into the fixed mold, the driving shaft drives the multiple push rods to move synchronously through the driving gear and the rack, after a product is cooled and formed, the push rods stretch out to eject the product out of the mold, the multiple push rods are matched to synchronously eject out at multiple positions of the product, and deformation or damage caused by adhesion between the product and the mold is avoided; and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to an injection mold for integral molding of front and rear covers. Background Technology

[0002] Injection molding is a processing method used for mass production of certain complex-shaped parts. The specific principle is that the heated and molten plastic raw material is pushed by the screw of the injection molding machine and injected into the mold cavity of the plastic mold under high pressure. After cooling and solidification, the plastic molded product is obtained. The injection mold consists of two parts: a moving mold and a fixed mold. When the mold is opened, the moving mold and the fixed mold separate to remove the plastic product. The one-piece injection molding process can form the front cover and the back cover of the product in one go, reducing production steps and time, and improving production efficiency. Since the front and back covers are formed simultaneously in the same mold, it can ensure that the size, shape and fitting accuracy of the front and back covers are highly consistent, reducing assembly errors.

[0003] Because of its more complex internal structure, one-piece molds cause different parts of the product to cool at different rates during cooling. Poor temperature control can lead to the product sticking to the mold surface, creating resistance when the mold separates. This separation can pull the product, potentially causing deformation or even breakage, affecting product yield and damaging the mold surface, thus reducing the mold's lifespan. To address these issues, a one-piece injection mold with front and rear covers is proposed. Utility Model Content

[0004] To solve the above-mentioned technical problems, an integrated injection mold for front and rear covers is provided. This technical solution solves the problem that different parts of the product inside the mold cool at different rates during cooling, and poor temperature control can lead to the product sticking to the mold surface, making it difficult to demold and damaging the mold.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A front and rear cover integrated injection mold includes a fixed mold and a moving mold, which are arranged correspondingly. Two cores are provided at one end of the fixed mold near the moving mold. The moving mold has cavities corresponding to the cores inside. Multiple push rods are provided inside each of the two cores. Multiple fixed mold locating pins are fixedly connected to one side of the fixed mold. Multiple moving mold locating holes matching the fixed mold locating pins are provided on the side of the moving mold near the fixed mold. Multiple coolant delivery pipes are connected to both ends of the fixed mold and the moving mold. The coolant delivery pipes are used to deliver coolant to cool the mold. A drive shaft is rotatably connected to the upper end of the fixed mold, and the lower end of the drive shaft extends into the interior of the fixed mold. Two cavities are provided inside the fixed mold, and the two cavities are arranged corresponding to the cores.

[0007] Preferably, two drive gears are fixedly connected to the periphery of the drive shaft. The two drive gears are respectively disposed inside the cavity. Each drive gear meshes with a rack on one side of the rack. A connecting plate is fixedly connected to one end of the rack.

[0008] Preferably, the end of the connecting plate away from the rack is fixedly connected to a plurality of push rods, the surface of the push rods is slidably connected to the core, and the push rods are used to demold the product.

[0009] Preferably, the fixed mold has multiple fixed mold positioning holes at one end near the moving mold, and the multiple fixed mold positioning holes are spaced apart from the fixed mold positioning pins. The moving mold has multiple moving mold positioning pins that match the fixed mold positioning holes fixedly connected to the opposite side.

[0010] Preferably, one end of the coolant delivery pipe extending into the interior of the fixed mold and the moving mold is connected to a cooling heat absorption pipe, which is coiled inside the core.

[0011] Preferably, the fixed mold has an injection hole at the end away from the moving mold, the injection hole extends into the interior of the fixed mold and communicates with the main runner, and the main runner extends to the two cores.

[0012] Preferably, the moving mold has a secondary flow channel corresponding to the main flow channel inside, and the main flow channel and the secondary flow channel are used to transport raw materials.

[0013] Preferably, one end of both the fixed mold and the moving mold is provided with a plurality of fixing pin holes, which are used to fix the fixed mold and the moving mold.

[0014] The advantages of this utility model compared with the prior art are:

[0015] 1. This utility model is equipped with multiple push rods, which are driven by a drive shaft to move synchronously. After the product cools and forms, the drive shaft drives the push rods to extend through the connecting plate and rack to eject the product from the mold. By cooperating with multiple push rods to eject the product synchronously at multiple positions, the product is prevented from sticking to the mold, which could lead to deformation or damage, thus improving product quality.

[0016] 2. This utility model is equipped with a coolant delivery pipe and a cooling heat absorption pipe. The cooling heat absorption pipe is coiled inside the fixed mold and the moving mold. It cools the mold by absorbing the heat of the core and the cavity, so that the product can be cooled and formed quickly. The cooling heat absorption pipe fills the space inside the core and the cavity, which can effectively avoid the problem of different cooling rates in different parts of the mold and prevent the product from sticking to the mold. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2This is a structural schematic diagram from another perspective of the present invention;

[0019] Figure 3 This is a longitudinal sectional view of the fixed mold in this utility model;

[0020] Figure 4 This is a schematic diagram of the transverse cross-sectional structure of the fixed mold in this utility model.

[0021] The numbers on the map are:

[0022] 1. Fixed mold; 11. Core; 12. Fixed mold locating pin; 13. Fixed mold locating hole; 14. Main runner; 15. Ejector pin; 16. Connecting plate; 17. Rack; 18. Cavity;

[0023] 2. Moving mold; 21. Cavity; 22. Moving mold locating pin; 23. Moving mold locating hole; 24. Secondary runner;

[0024] 3. Injection holes;

[0025] 4. Coolant delivery pipe; 41. Cooling heat absorption pipe;

[0026] 5. Drive shaft; 51. Drive gear;

[0027] 6. Fixing pin hole. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model. It is understood that the accompanying drawings are provided for reference and illustration only and are not intended to limit the present utility model. The connection relationships shown in the drawings are only for clear description and do not limit the connection method.

[0029] like Figure 1 and 2As shown, a front and rear cover integrated injection mold includes a fixed mold 1 and a moving mold 2, which are arranged correspondingly. Two cores 11 are provided at one end of the fixed mold 1 near the moving mold 2. A cavity 21 corresponding to the cores 11 is opened inside the moving mold 2. After the fixed mold 1 and the moving mold 2 are fitted together, the internal space of the cores 11 and the cavity 21 forms the shape of the product. Multiple push rods 15 are provided inside each of the two cores 11. Multiple fixed mold positioning pins 12 are fixedly connected to one side of the fixed mold 1. Multiple moving mold positioning holes 23 matching the fixed mold positioning pins 12 are provided on the side of the moving mold 2 near the fixed mold 1. Multiple fixed mold positioning holes 13 are opened at one end of the fixed mold 1 near the moving mold 2. The multiple fixed mold positioning holes 13 and the fixed mold positioning pins 12 are spaced apart. The opposite side of the moving mold 2 is fixed... The fixed mold 1 and the moving mold 2 are connected to a number of moving mold positioning pins 22 that match the fixed mold positioning holes 13. When the fixed mold 1 and the moving mold 2 are fitted together, the fixed mold positioning pins 12 are inserted into the moving mold positioning holes 23. The fixed mold positioning holes 13 and the moving mold positioning pins 22 are inserted to limit the fixed mold 1 and the moving mold 2, ensuring that the core 11 and the cavity 21 can be aligned when the fixed mold 1 and the moving mold 2 are fitted together, thus avoiding product defects. Both ends of the fixed mold 1 and the moving mold 2 are connected to a number of coolant delivery pipes 4. The coolant delivery pipes 4 are used to deliver coolant to cool the mold. The upper end of the fixed mold 1 is rotatably connected to a drive shaft 5. The lower end of the drive shaft 5 extends into the interior of the fixed mold 1. Both the fixed mold 1 and the moving mold 2 are provided with a number of fixing pin holes 6 at one end. The fixing pin holes 6 are used to connect and fix the fixed mold 1 and the moving mold 2 to the injection molding equipment.

[0030] like Figure 3 As shown, the fixed mold 1 has two cavities 18 inside, which are corresponding to the core 11. Two drive gears 51 are fixedly connected to the periphery of the drive shaft 5. The two drive gears 51 are respectively set inside the cavity 18. The drive gears 51 mesh with the rack 17 on one side. A connecting plate 16 is fixedly connected to one end of the rack 17. The end of the connecting plate 16 away from the rack 17 is fixedly connected to multiple push rods 15. The surface of the push rod 15 is slidably connected to the core 11. The rotation of the drive shaft 5 can drive the rack 17 to move left and right, thereby driving the connecting plate 16 to move. The connecting plate 16 can drive the push rods 15 to extend or retract. When the product is demolded after molding, the multiple push rods 15 extend at the same time to drive the product to get off the mold, avoiding the product from sticking to the mold and causing deformation or damage.

[0031] Please refer to Figure 4 The coolant delivery pipe 4 extends into the interior of the fixed mold 1 and the moving mold 2, and is connected to a cooling heat absorption pipe 41. The cooling heat absorption pipe 41 is coiled inside the core 11. The coolant is delivered to the cooling heat absorption pipe 41 through the coolant delivery pipe 4. The cooling heat absorption pipe 41 can quickly absorb the heat in the core 11 and the fixed mold 1 after multiple coiling, so that the mold can be cooled quickly. The cooling heat absorption pipe 41 fills the space inside the core 11, which can effectively avoid the problem of different cooling rates in different parts of the mold and prevent the product from sticking to the mold.

[0032] The fixed mold 1 has an injection hole 3 at the end away from the moving mold 2. The injection hole 3 extends into the interior of the fixed mold 1 and is connected to the main runner 14. The main runner 14 extends to the two cores 11. The moving mold 2 has a secondary runner 24 corresponding to the main runner 14. The main runner 14 and the secondary runner 24 are used to transport raw materials. Through multiple main runners 14 and secondary runners 24, the raw materials can be quickly filled into the space between the core 11 and the cavity 21, and the filling is more uniform.

[0033] The principle of this utility model is as follows: The fixed mold 1 and the moving mold 2 are connected and fixed to the injection molding equipment through the fixing pin hole 6. The injection molding equipment drives the fixed mold 1 and the moving mold 2 to approach and fit together. The fixed mold positioning pin 12 is inserted into the moving mold positioning hole 23, and the fixed mold positioning hole 13 is inserted into the moving mold positioning pin 22 to limit the fixed mold 1 and the moving mold 2, ensuring that the core 11 and the cavity 21 can be aligned when the fixed mold 1 and the moving mold 2 are fitted together, thus avoiding product defects. Then, the injection molding equipment injects raw material through the injection hole 3. The raw material is injected into the space between the core 11 and the cavity 21 through the main runner 14 and the secondary runner 24, and is delivered through the coolant delivery pipe. Coolant is supplied to the cooling heat absorption pipe 41. The coolant absorbs the heat from the core 11 and the cavity 21, thus cooling the mold. The cooling heat absorption pipe 41 fills the space inside the core 11, which can effectively avoid the problem of different cooling rates in different parts of the mold. Then, the injection molding equipment drives the fixed mold 1 and the moving mold 2 to separate. Then, the drive shaft 5 is driven to rotate through the transmission device. The rotation of the drive shaft 5 can drive the rack 17 to move left and right, which in turn drives the connecting plate 16 to move. The connecting plate 16 drives multiple push rods 15 to extend synchronously, ejecting the product from the mold. This avoids the product from sticking to the mold, which can cause deformation or damage, and improves product quality.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A one-piece injection mold for front and rear covers, characterized in that: The system includes a fixed mold (1) and a moving mold (2), which are arranged correspondingly. The fixed mold (1) has two cores (11) at one end near the moving mold (2). The moving mold (2) has cavities (21) corresponding to the cores (11) inside. Each of the two cores (11) has multiple push rods (15) inside. The fixed mold (1) has multiple fixed mold positioning pins (12) fixedly connected to one side. The moving mold (2) has multiple fixed mold positioning pins (12) on the side near the fixed mold (1). The mold positioning pin (12) is matched with the moving mold positioning hole (23). Both ends of the fixed mold (1) and the moving mold (2) are connected to multiple coolant delivery pipes (4). The coolant delivery pipes (4) are used to deliver coolant to cool the mold. The upper end of the fixed mold (1) is rotatably connected to a drive shaft (5). The lower end of the drive shaft (5) extends into the interior of the fixed mold (1). The interior of the fixed mold (1) is provided with two cavities (18). The two cavities (18) are correspondingly provided with the core (11).

2. The injection mold for integral molding of front and rear covers according to claim 1, characterized in that: Two drive gears (51) are fixedly connected to the periphery of the drive shaft (5). The two drive gears (51) are respectively disposed inside the cavity (18). The drive gears (51) mesh with the rack (17) on one side. A connecting plate (16) is fixedly connected to one end of the rack (17).

3. The injection mold for integral molding of front and rear covers according to claim 2, characterized in that: The end of the connecting plate (16) away from the rack (17) is fixedly connected to a plurality of push rods (15), the surface of the push rods (15) is slidably connected to the core (11), and the push rods (15) are used to demold the product.

4. The injection mold for integral molding of front and rear covers according to claim 1, characterized in that: The fixed mold (1) has multiple fixed mold positioning holes (13) at one end near the moving mold (2). The multiple fixed mold positioning holes (13) are spaced apart from the fixed mold positioning pins (12). The moving mold (2) is fixedly connected to a multiple moving mold positioning pins (22) that match the fixed mold positioning holes (13).

5. The injection mold for integral molding of front and rear covers according to claim 1, characterized in that: The coolant delivery pipe (4) extends to one end of the fixed mold (1) and the moving mold (2) and is connected to a cooling heat absorption pipe (41). The cooling heat absorption pipe (41) is coiled inside the core (11).

6. The injection mold for integral molding of front and rear covers according to claim 1, characterized in that: The fixed mold (1) has an injection hole (3) at one end away from the moving mold (2). The injection hole (3) extends into the interior of the fixed mold (1) and communicates with the main channel (14). The main channel (14) extends to the two cores (11).

7. The injection mold for integral molding of front and rear covers according to claim 1, characterized in that: The moving mold (2) is provided with a secondary flow channel (24) corresponding to the main flow channel (14), and the main flow channel (14) and the secondary flow channel (24) are used to transport raw materials.

8. The injection mold for integral molding of front and rear covers according to claim 1, characterized in that: The fixed mold (1) and the moving mold (2) are each provided with a plurality of fixing pin holes (6) at one end, which are used to fix the fixed mold (1) and the moving mold (2).

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