Precise plastic mold

Abstract

The utility model relates to a precise plastic mold in the field of plastic molds, which comprises a fixed mold mechanism and a movable mold mechanism, the fixed mold mechanism and the movable mold mechanism can be mutually closed to form an injection molding cavity, the movable mold mechanism is butted with a nozzle of an injection molding machine, and plastic in a molten state in the injection molding machine can be injected into the injection molding cavity through the movable mold mechanism. The fixed mold mechanism comprises a positioning plate, a fixed mold base, a fixed mold core and a demolding assembly, the movable mold mechanism comprises a movable mold plate, a movable mold base, a movable mold core and a hot runner assembly, a locking block is arranged on the movable mold base, one end of a locking connecting piece can be meshed with the locking block, and the end, away from the clamping hook, of the locking connecting piece is connected with an air cylinder. The air cylinder is used for controlling the locking connecting piece and the locking block, the locking connecting piece is controlled to turn over through the air cylinder so as to control engagement and disengagement of the locking connecting piece and the locking block, locking of the mold mechanism and the movable mold mechanism is faster, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic molds, and in particular to a precision plastic mold. Background Technology

[0002] Plastic molds are indispensable tools in the plastics processing industry. They are used in conjunction with plastic molding machines to give plastic products a complete shape and precise dimensions. Depending on the molding method, plastic molds can be divided into many types, mainly including injection molding molds, extrusion molding molds, blow molding molds, compression molding molds, etc.

[0003] A plastic mold mainly consists of two parts: a moving mold and a fixed mold. The moving mold is installed on the moving platen of the injection molding machine, and the fixed mold is installed on the fixed platen. Although the structure of the mold can vary greatly depending on the type and properties of the plastic, the shape and structure of the plastic product, and the type of injection molding machine, the basic structure remains the same. The mold mainly consists of a gating system, a temperature control system, molding parts, and structural parts.

[0004] After the plastic mold is closed, a locking plate is used to fix the moving mold and the fixed mold together to prevent the moving mold and the fixed mold from separating due to accidents during the product molding process. The locking plate of the existing plastic mold is usually installed manually. After the moving mold and the fixed mold are closed, the worker connects the locking plate to the moving mold and the fixed mold with bolts, which is complicated and inefficient. Utility Model Content

[0005] In order to overcome the shortcomings of existing technical solutions, this utility model provides a precision plastic mold that can effectively solve the technical problem that the moving mold and the fixed mold need to be manually locked after mold closing.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A precision plastic mold includes a fixed mold mechanism and a moving mold mechanism. The fixed mold mechanism and the moving mold mechanism can close together to form an injection cavity. The moving mold mechanism is connected to the nozzle of an injection molding machine. Molten plastic in the injection molding machine can be injected into the injection cavity through the moving mold mechanism and molded into a product in the injection cavity. The fixed mold mechanism includes a positioning plate, a fixed mold base, a fixed mold core, and a demolding assembly. The fixed mold base has the positioning plate at one end near the moving mold mechanism. The fixed mold core is disposed in the positioning base, and the end of the fixed mold core near the moving mold mechanism has a fixed mold cavity. The demolding assembly is disposed between the positioning plate and the fixed mold base and extends... The moving mold mechanism, located within the fixed mold core, includes a moving mold plate, a moving mold base, a moving mold core, and a hot runner assembly. The moving mold core is positioned within the moving mold base, with a moving mold cavity located at one end near the fixed mold mechanism. The moving mold cavity and the fixed mold cavity close together to form an injection cavity. The hot runner assembly is positioned between the moving mold base and the moving mold plate, with both ends extending to the moving mold core and the moving mold plate, respectively. The fixed mold base is equipped with a flip-up locking connector, and the moving mold base is equipped with a locking block. One end of the locking connector can engage with the locking block, and the end of the locking connector away from the latch is connected to a cylinder. The cylinder is used to control the locking connector and the locking block.

[0008] Furthermore, the locking block is provided with a slot, and the two ends of the locking connector are provided with hooks and flip arms. The hooks are used to engage with the slots, and the two ends of the cylinder are connected to the flip arms and the positioning plate respectively through rotatable connecting seats.

[0009] Furthermore, the surfaces of both the slot and the hook are provided with serrated anti-slip textures, which interlock when the slot and the hook are engaged.

[0010] Furthermore, the locking connector has a pivot in the middle section, and one end of the pivot is connected to the fixed mold base.

[0011] Furthermore, the fixed mold base and the moving mold base are also provided with cooling pipes, the two ends of which extend to the surfaces of the fixed mold base and the moving mold base, and are provided with water pipe interfaces.

[0012] Furthermore, the positioning plate is provided with a guide sleeve, and the moving plate is provided with a guide post, which can be inserted into the guide sleeve.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: by engaging the locking connector with the locking block, the locking of the fixed mold mechanism and the moving mold mechanism after mold closing is achieved. The engagement and disengagement of the locking connector with the locking block are controlled by the cylinder by rotating the locking connector. After the fixed mold core and the moving mold core are closed, the cylinder's telescopic rod retracts, and the locking connector rotates towards the locking block, so that the locking connector engages with the locking block. After the cylinder's telescopic rod extends, the locking connector rotates away from the locking block, so that the locking connector disengages from the locking block. The locking of the mold mechanism and the moving mold mechanism is faster, improving production efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model;

[0016] Figure 3 This is a schematic diagram showing the engagement of the slot and the hook in this utility model;

[0017] The following are the labels in the diagram: 1-Fixed template, 2-Fixed mold base, 3-Fixed mold core, 4-Ejector pin, 5-Guide pillar, 6-Top plate, 7-Fixed plate, 8-Spring, 9-Moving template, 10-Moving mold base, 11-Moving mold core, 12-Flange, 13-Main nozzle, 14-Diverter plate, 15-Diverter sleeve, 16-Locking connector, 17-Rotating shaft, 18-Locking block, 19-Cylinder, 20-Slot, 21-Hook, 22-Flip arm. Detailed Implementation

[0018] 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.

[0019] The following is combined Figures 1-3 A detailed description of a precision plastic mold according to this utility model is provided below:

[0020] A precision plastic mold includes a fixed mold mechanism and a moving mold mechanism. The fixed mold mechanism and the moving mold mechanism can be closed to form an injection cavity. The moving mold mechanism is connected to the nozzle of an injection molding machine. Molten plastic in the injection molding machine can be injected into the injection cavity through the moving mold mechanism and molded into a product in the injection cavity. The fixed mold mechanism includes a fixed mold plate 1, a fixed mold base 2, a fixed mold core 3, and a demolding assembly. The fixed mold base 2 is provided with a fixed mold plate near one end of the moving mold mechanism. The fixed mold core 3 is disposed in the fixed mold base 2, and a fixed mold cavity is provided at one end of the fixed mold core 3 near the moving mold mechanism. The demolding assembly is disposed between the fixed mold plate 1 and the fixed mold base 2 and extends into the fixed mold core 3. The demolding assembly consists of an ejector pin 4, a guide post 5, an ejector plate 6, and a fixing plate 7. The structure consists of an ejector pin 4 vertically mounted on a fixed plate 7, with one end of the ejector pin 4 extending away from the fixed plate 7 to the inner wall of the fixed mold core 3. An ejector plate 6 is located at the end of the fixed plate 7 away from the fixed mold core 3 and has a top groove on its surface. A through hole is provided on the fixed mold plate 1, through which the ejector rod of the injection molding machine can pass and contact the top groove to push the ejector plate 6. The two ends of the guide post 5 are connected to the fixed mold base 2 and the fixed mold plate 1, respectively. A spring 8 is provided on the outer side of the guide post 5, with the two ends of the spring 8 pressing against the fixed mold base 2 and the fixed plate 7, respectively. The ejector rod of the injection molding machine pushes the ejector plate 6, causing the fixed plate 7 to drive the ejector pin 4 into the fixed mold cavity, thereby ejecting the product. After the ejector rod of the injection molding machine retracts, the fixed plate 7 drives the ejector pin 4 to reset under the action of the spring 8.

[0021] The moving mold mechanism includes a moving mold plate 9, a moving mold base 10, a moving mold core 11, and a hot runner assembly. The moving mold core 11 is disposed within the moving mold base 10, and a moving mold cavity is provided at one end near the fixed mold mechanism. The moving mold cavity and the fixed mold cavity close together to form an injection cavity. The hot runner assembly is disposed between the moving mold base 10 and the moving mold plate 9, with both ends extending to the moving mold core 11 and the moving mold plate 9, respectively. Cooling pipes are also provided within the fixed mold base 2 and the moving mold base 10, with both ends extending to the fixed mold core 11 and the moving mold plate 9. The surfaces of the mold base 2 and the moving mold base 10 are provided with water pipe interfaces. The positioning plate is provided with a guide sleeve, and the moving plate is provided with a guide post. The guide post can be inserted into the guide sleeve. The hot runner assembly includes a main nozzle 13, a flow divider plate 14, and a flow divider sleeve 15. The moving mold plate 9 is provided with a flange 12 for docking with the injection molding machine nozzle. The main nozzle 13 docks with the flange 12. The flow divider plate 14 divides the molten plastic into each flow divider sleeve 15, and then flows from the flow divider sleeve 15 into the injection cavity.

[0022] A flip-up locking connector 16 is provided on the fixed mold base 2. A rotating shaft 17 is provided in the middle section of the locking connector 16. One end of the rotating shaft 17 is connected to the fixed mold base 2. A locking block 18 is provided on the moving mold base 10. One end of the locking connector 16 can engage with the locking block 18. A cylinder 19 is connected to the end of the locking connector 16 away from the hook 21. The cylinder 19 is used to control the locking connector 16 and the locking block 18. A slot 20 is provided on the locking block 18. Hooks 21 and flip arms 22 are provided at both ends of the locking connector 16. Hooks 21 are used to engage with slots 20. Both ends of the cylinder 19 are connected to the flip arms 22 and the positioning plate respectively through rotatable connecting seats. The surfaces of slots 20 and hooks 21 are provided with serrated anti-slip textures. When slots 20 and hooks 21 are engaged, the serrated anti-slip textures engage with each other.

[0023] This embodiment of a precision plastic mold uses a locking connector 16 to engage with a locking block 18, thereby locking the fixed mold mechanism and the moving mold mechanism after mold closing. A cylinder 19 controls the rotation of the locking connector 16, thus controlling the engagement and disengagement of the locking connector 16 and the locking block 18. After the fixed mold core 3 and the moving mold core 11 are closed, the telescopic rod of the cylinder 19 retracts, causing the locking connector 16 to rotate towards the locking block 18, engaging with it. After the telescopic rod of the cylinder 19 extends, the locking connector 16 rotates away from the locking block 18, disengaging it. This allows for faster locking of the mold mechanism and the moving mold mechanism, improving production efficiency. It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A precision plastic mold, comprising a fixed mold mechanism and a moving mold mechanism, wherein the fixed mold mechanism and the moving mold mechanism can be closed to each other to form an injection cavity, the moving mold mechanism being connected to the nozzle of an injection molding machine, wherein molten plastic in the injection molding machine can be injected into the injection cavity through the moving mold mechanism and molded into a product in the injection cavity, characterized in that: The fixed mold mechanism includes a positioning plate, a fixed mold base, a fixed mold core, and a demolding assembly. The fixed mold base has a positioning plate at one end near the moving mold mechanism. The fixed mold core is located inside the positioning base, and a fixed mold cavity is located at the end of the fixed mold core near the moving mold mechanism. The demolding assembly is located between the positioning plate and the fixed mold base and extends into the fixed mold core. The moving mold mechanism includes a moving mold plate, a moving mold base, a moving mold core, and a hot runner assembly. The moving mold core is located inside the moving mold base, and a moving mold cavity is located at the end near the fixed mold mechanism. The moving mold cavity and the fixed mold cavity are closed to form an injection cavity. The hot runner assembly is located between the moving mold base and the moving mold plate, and both ends of the hot runner assembly extend to the moving mold core and the moving mold plate, respectively. A flip-up locking connector is provided on the fixed mold base, and a locking block is provided on the moving mold base. One end of the locking connector can engage with the locking block. A cylinder is connected to the end of the locking connector away from the hook. The cylinder is used to control the locking connector and the locking block.

2. The precision plastic mold according to claim 1, characterized in that: The locking block is provided with a slot, and the two ends of the locking connector are provided with hooks and flip arms. The hooks are used to engage with the slots, and the two ends of the cylinder are connected to the flip arms and the positioning plate respectively through rotatable connecting seats.

3. A precision plastic mold according to claim 2, characterized in that: The surfaces of both the slot and the hook are provided with serrated anti-slip textures, which interlock when the slot and the hook are engaged.

4. A precision plastic mold according to any one of claims 1-3, characterized in that: The locking connector has a pivot in the middle section, and one end of the pivot is connected to the fixed mold base.

5. A precision plastic mold according to any one of claims 1-3, characterized in that: The fixed mold base and the moving mold base are also provided with cooling pipes, the two ends of which extend to the surfaces of the fixed mold base and the moving mold base and are provided with water pipe interfaces.

6. A precision plastic mold according to any one of claims 1-3, characterized in that: The positioning plate is provided with a guide sleeve, and the moving plate is provided with a guide post, which can be inserted into the guide sleeve.

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