Injection mold convenient to demold

Abstract

The utility model relates to the field of injection molds, in particular to an injection mold convenient to demold, which comprises a panel and a base, a first molding plate and a second molding plate are mounted on the base through support blocks, the first molding plate and the second molding plate are closed to form a pouring cavity, and a pouring mold is detachably connected in the pouring cavity. The pouring mold comprises an upper mold block and a lower mold block, a male mold is formed on the surface of the lower mold block, a guide groove is formed in the first forming plate, the end, close to the male mold, of the guide groove is connected with a demolding ejection block capable of being jacked, the demolding ejection block is connected with a reset piece, and a demolding push plate is slidably connected into the guide groove. One end of the demolding push plate extends towards the outer side face of the first forming plate and is connected with a driving piece, the driving piece can drive the demolding push plate to stably push the demolding ejection block to ascend, and therefore when the demolding ejection block ascends, cooled and formed melt can be ejected out of the male die, the demolding process is more convenient and efficient, and the demolding efficiency is improved. And the production efficiency and reliability of ejection demolding are improved.

Description

Technical Field

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

[0002] As an indispensable tool in modern industrial production, injection molds have a wide range of applications, covering many industrial fields. Injection mold technology has become the preferred method for manufacturing plastic products due to its flexibility, low cost and excellent finished product characteristics.

[0003] The basic structure of an injection mold usually includes seven parts: molding parts, pouring system, guide mechanism, ejector device, lateral parting and core pulling mechanism, cooling and heating system, and exhaust system. Among them, the molding parts constitute the mold cavity and are the key part that determines the shape and size of the product. The pouring system is responsible for the flow and distribution of the plastic melt. The guide mechanism ensures accurate mold closing. The ejector device is used to eject the finished product from the mold. The lateral parting and core pulling mechanism are used to deal with the demoulding problem of products with complex shapes. The cooling and heating system controls the mold temperature and affects the molding quality of the product. The exhaust system is responsible for removing the gas in the mold to prevent product defects.

[0004] However, although the existing injection mold technology is relatively mature, there are still some defects in practical applications, especially in the demolding process. The existing molded products are generally ejected directly by the ejector pin. During the demolding process of some products with complex shapes or precise structures, problems such as mold jamming, straining or deformation of the ejector pin ejection position are prone to occur, resulting in an increase in product scrap rate and affecting production efficiency. In addition, the demolding mechanism design of the ejector pin is relatively simple, and the demolding process often takes a long time, resulting in an inconvenient demolding method, which increases the user's workload and reduces production efficiency. Utility Model Content

[0005] The purpose of the utility model is to solve the above defects and provide an injection mold that is easy to demould, so as to solve the technical problem that the demoulding structure of the injection mold in the above background technology is relatively simple, resulting in poor demoulding effect, thereby affecting the demoulding production efficiency.

[0006] The purpose of the utility model is achieved by the following methods:

[0007] An injection mold for easy demoulding comprises a panel and a base, wherein a first molding plate and a second molding plate are mounted on the base through a support block, the first molding plate and the second molding plate are closed to form a casting cavity, a casting mold is detachably connected in the casting cavity, the panel is mounted on the second molding plate, and a casting positioning ring for injecting molten material into the casting cavity is provided on the panel, the casting mold comprises an upper module and a lower module, the lower module is mounted on the first molding plate, a convex mold is formed on the surface of the lower module, and the upper module is mounted on the second molding plate. A mold cavity matched with the punch is provided on the upper module, a guide groove is formed on the first molding plate, one end of the guide groove extends toward the punch, and a liftable demoulding block is connected to the end of the guide groove close to the punch, a reset part is connected to the demoulding block, a demoulding push plate is slidably connected in the guide groove, one end of the demoulding push plate extends toward the outer side surface of the first molding plate and is connected to a driving part, when the molten material is cooled and formed, the driving part drives the demoulding push plate to move toward the demoulding push block, so that the demoulding push plate can drive the demoulding push block to eject the cooled and formed molten material.

[0008] In the above description, one end of the guide groove extends toward the side of the male mold, and the other end of the guide groove extends toward the outer side of the first molding plate, the demoulding push plate is slidably installed in the guide groove, and a push portion is formed at one end of the demoulding push plate close to the demoulding top block, and a pressure plate is installed on the guide groove. By providing a slidable demoulding push plate, it can control the demoulding top block to pre-demold the molten finished product, thereby improving the efficiency and stability of demoulding.

[0009] Further in the above description, a guide hole is provided at the end of the guide groove near the punch, the demoulding top block is installed in pair with the guide hole through a guide column, a reset piece is sleeved on the guide column, and one end of the reset piece is connected to the bottom wall of the guide hole, an extrusion portion is formed on the side of the demoulding top block near the demoulding push plate, and a gap is formed between the bottom of the demoulding top block and the bottom wall of the guide groove. Through the provided guide hole, the demoulding top block can be lifted and lowered along the guide hole through the guide column, and when the push portion of the demoulding push plate moves toward the demoulding top block, the push portion of the demoulding push plate can squeeze the extrusion portion of the demoulding top block, thereby driving the demoulding top block to eject the punch, thereby improving the demoulding efficiency.

[0010] In the above description, the driving member is further installed on the side of the first forming plate, and the driving end of the driving member extends to and is connected to the end of the demoulding push plate. The connected driving member can drive the demoulding push plate, thereby improving work efficiency.

[0011] Optionally, the driving member is a driving cylinder, a driving electric cylinder or a hydraulic cylinder.

[0012] Further in the above description, a positioning guide column is provided on the first forming plate, and the second forming plate is matched and connected with the positioning guide column via a positioning guide sleeve.

[0013] In the above description, the base is provided with a mounting plate, and an ejector is connected to the mounting plate through the ejector plate, and one end of the ejector passes through the first molding plate and extends toward the male mold. The ejector can further demould the cooled melt on the male mold, thereby improving the efficiency and reliability of demoulding.

[0014] The beneficial effects of the utility model are as follows: a demoulding ejector block is installed in a guide groove arranged on the first molding plate, the demoulding ejector block is arranged on the side of the punch, and a reset part is connected to the demoulding ejector block to ensure the accuracy and stability of the demoulding action. After the molten material is cooled and formed, the demoulding push plate can be driven by the driving part to move along the guide groove, so that the demoulding push plate can smoothly push the demoulding ejector block to rise, so that the cooled and formed molten material can be ejected from the punch when the demoulding ejector block rises, avoiding product damage or mold wear caused by direct mechanical ejection. At the same time, when the driving part contracts, the demoulding push plate moves toward the outer side surface of the first molding plate, so that the demoulding ejector block can automatically reset after completing the demoulding action under the reset action of the reset part, so as to prepare for the next injection molding process, making the demoulding process more convenient and efficient, and the demoulding ejector block is arranged on the edge of the punch for ejection, so that the ejection damage to the molten material product is reduced during the ejection process, and the production efficiency and reliability of ejection and demoulding are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall stereogram of this embodiment;

[0016] Figure 2 It is a partial exploded view of this embodiment;

[0017] Figure 3 It is a schematic diagram of the local structure of this embodiment;

[0018] Figure 4 It is a right side view of this embodiment;

[0019] Figure 5 for Figure 4 Sectional view of AA in the middle;

[0020] Figure 6 for Figure 5 A partial enlarged schematic diagram of C in the middle;

[0021] Figure 7 for Figure 4 Cross-sectional view of the middle BB;

[0022] Figure 8 for Figure 7 A partial enlarged schematic diagram of D in the middle;

[0023] The reference numerals in the figure are: 1-panel, 2-base, 3-support block, 4-first molding plate, 5-second molding plate, 6-casting positioning ring, 7-upper module, 8-lower module, 9-punch, 10-mold cavity, 11-guide groove, 12-demolding top block, 13-resetting member, 14-demolding push plate, 15-driving member, 16-pushing part, 17-pressing plate, 18-guide hole, 19-guide column, 20-extrusion part, 21-positioning guide column, 22-mounting plate, 23-top plate, 24-throw pin. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] In this embodiment, refer to Figure 1-Figure 8 The specifically implemented injection mold for easy demoulding includes a panel 1 and a base 2, a first molding plate 4 and a second molding plate 5 are installed on the base 2 through a support block 3, the first molding plate 4 and the second molding plate 5 are closed to form a casting cavity, and a casting mold is detachably connected in the casting cavity, the panel 1 is installed on the second molding plate 5, and a casting positioning ring 6 for injecting molten material into the casting cavity is provided on the panel 1, the casting mold includes an upper module 7 and a lower module 8, the lower module 8 is installed on the first molding plate 4, and a convex mold 9 is formed on the surface of the lower module 8, the upper module 7 is installed on the second molding plate 5, and the upper module 7 A mold cavity 10 matched with the punch 9 is provided on the first molding plate 4, a guide groove 11 is formed on the first molding plate 4, one end of the guide groove 11 extends toward the punch 9, and the end of the guide groove 11 close to the punch 9 is connected with a liftable demoulding top block 12, and a reset member 13 is connected to the demoulding top block 12, and a demoulding push plate 14 is slidably connected in the guide groove 11, one end of the demoulding push plate 14 extends toward the outer side surface of the first molding plate 4 and is connected with a driving member 15. When the molten material is cooled and formed, the driving member 15 drives the demoulding push plate 14 to move toward the demoulding top block 12, so that the demoulding push plate 14 can drive the demoulding top block 12 to eject the cooled and formed molten material.

[0026] One end of the guide groove 11 extends toward the side of the punch 9, and the other end of the guide groove 11 extends toward the outer side of the first molding plate 4. The demoulding push plate 14 is slidably installed in the guide groove 11, and a push portion 16 is formed at one end of the demoulding push plate 14 close to the demoulding top block 12. A pressing plate 17 is installed on the guide groove 11. By providing a slidable demoulding push plate 14, it can control the demoulding top block 12 to pre-demold the molten finished product, thereby improving the efficiency and stability of demoulding.

[0027] A guide hole 18 is provided at the end of the guide groove 11 near the punch 9, and the demoulding top block 12 is installed in pair with the guide hole 18 through a guide column 19. The reset member 13 is sleeved on the guide column 19, and one end of the reset member 13 is connected to the bottom wall of the guide hole 18. The demoulding top block 12 is formed with an extrusion portion 20 on the side near the demoulding push plate 14, and a gap is formed between the bottom of the demoulding top block 12 and the bottom wall of the guide groove 11. Through the provided guide hole 18, the demoulding top block 12 can be lifted and lowered along the guide hole 18 through the guide column 19. When the push portion 16 of the demoulding push plate 14 moves toward the demoulding top block 12, the push portion 16 of the demoulding push plate 14 can squeeze the extrusion portion 20 of the demoulding top block 12, thereby driving the demoulding top block 12 to eject the punch 9, thereby improving the demoulding efficiency. The driving member 15 is installed on the side of the first molding plate 4, and the driving end of the driving member 15 extends to and is connected to the end of the demoulding push plate 14. The connected driving member 15 can provide driving power for the demoulding push plate 14, thereby improving work efficiency.

[0028] Specifically, the reset member 13 is a reset spring, and the driving member 15 is a driving cylinder.

[0029] The first molding plate 4 is provided with a positioning guide column 21, and the second molding plate 5 is matched and connected with the positioning guide column 21 through a positioning guide sleeve. The base 2 is provided with a mounting plate 22, and an ejector pin 24 is connected to the mounting plate 22 through an ejector plate 23, and one end of the ejector pin 24 passes through the first molding plate 4 and extends toward the punch 9. The ejector pin 24 can further demold the cooled melt on the punch 9, thereby improving the efficiency and reliability of demolding.

[0030] The ejector drive installation structure in this embodiment is a conventional technical means for those skilled in the art and will not be specifically described in this embodiment.

[0031] The specific use principle of this embodiment is as follows: two support blocks 3 are installed on the base 2, the first molding plate 4 is installed on the support block 3, and the lower module 8 is installed on the first molding plate 4, the second molding plate 5 is connected to the upper module 7 and connected to the first molding plate 4, the panel 1 is installed on the second molding plate 5, and is connected to the external injection molding mechanism through a positioning ring, a main flow channel is formed on the positioning ring and extends to the casting mold, a demoulding top block 12 is installed in the guide groove 11 provided on the first molding plate 4, the demoulding top block 12 is provided on the side of the punch 9, so that the demoulding top block 12 contacts the outer side of the punch 9, the demoulding top block 12 is installed on the guide hole 18 of the guide groove 11 through a guide column 19, and the reset member 13 is sleeved on the guide column 19, the demoulding push plate 14 is slidably installed in the guide groove 11, the driving member 15 is specifically a driving cylinder, so that the telescopic shaft of the driving member 15 is connected to one end of the demoulding push plate 14, when the molten material cools down After the molding, the demoulding push plate 14 can be driven to move along the guide groove 11 by extending the telescopic shaft of the driving member 15, so that the pushing portion 16 of the demoulding push plate 14 passes through the gap and can smoothly push the demoulding ejector block 12 to rise, so that the cooled and molded molten material can be ejected from the punch 9 when the demoulding ejector block 12 rises, avoiding product damage or mold wear caused by direct mechanical ejection, and further ejecting by the external ejector pin 24. At the same time, when the telescopic shaft of the driving member 15 contracts, the demoulding push plate 14 moves toward the outer side of the first molding plate 4, so that the demoulding ejector block 12 can automatically reset after completing the demoulding action under the reset action of the reset member 13, so as to prepare for the next injection molding process, making the demoulding process more convenient and efficient, and the demoulding ejector block 12 is set at the edge of the punch 9 for ejection, so that the ejection damage to the molten product is reduced during the ejection process, and the production efficiency and reliability of ejection and demoulding are improved.

[0032] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model is disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content disclosed above without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiments according to the technology of the utility model, which does not depart from the content of the technical solution of the utility model, belongs to the scope of the technical solution of the utility model.

Claims

1. An injection mold for easy demoulding, comprising a panel and a base, wherein a first molding plate and a second molding plate are mounted on the base through a support block, the first molding plate and the second molding plate are closed to form a pouring cavity, a pouring mold is detachably connected in the pouring cavity, the panel is mounted on the second molding plate, and a pouring positioning ring for injecting molten material into the pouring cavity is provided on the panel, characterized in that: The casting mold includes an upper module and a lower module, the lower module is installed on the first molding plate, and a punch is formed on the surface of the lower module, the upper module is installed on the second molding plate, and a mold cavity matched with the punch is provided on the upper module, a guide groove is formed on the first molding plate, one end of the guide groove extends toward the punch, and a demolding block that can be lifted is connected to the end of the guide groove close to the punch, a reset part is connected to the demolding block, a demolding push plate is slidably connected in the guide groove, one end of the demolding push plate extends toward the outer side surface of the first molding plate and is connected to a driving part, when the molten material is cooled and formed, the driving part drives the demolding push plate to move toward the demolding push block, so that the demolding push plate can drive the demolding push block to eject the cooled and formed molten material.

2. The injection mold for easy demoulding according to claim 1, characterized in that: One end of the guide groove extends toward the side of the punch, and the other end of the guide groove extends toward the outer side of the first forming plate. The demoulding push plate can be slidably installed in the guide groove, and a pushing portion is formed at one end of the demoulding push plate close to the demoulding top block, and a pressure plate is installed on the guide groove.

3. The injection mold for easy demoulding according to claim 2, characterized in that: A guide hole is formed at the end of the guide groove near the punch, the demoulding top block is installed in pair with the guide hole through a guide column, the reset piece is sleeved on the guide column, and one end of the reset piece is connected to the bottom wall of the guide hole, an extrusion portion is formed on the side of the demoulding top block near the demoulding push plate, and a gap is formed between the bottom of the demoulding top block and the bottom wall of the guide groove.

4. The injection mold for easy demoulding according to claim 1, characterized in that: The driving member is installed on the side of the first forming plate, and the driving end of the driving member extends to and is connected to the end of the demoulding push plate.

5. The injection mold for easy demoulding according to any one of claims 1 to 4, characterized in that: The first forming plate is provided with a positioning guide column, and the second forming plate is matched and connected with the positioning guide column through a positioning guide sleeve.

6. The injection mold for easy demoulding according to any one of claims 1 to 4, characterized in that: The base is provided with a mounting plate, the mounting plate is connected with an ejector pin via the ejector plate, and one end of the ejector pin passes through the first forming plate and extends toward the male mold.

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