A mold with a suction function

Abstract

The utility model discloses a mould with air -exhaust function, including front die (1), rear die (1), front mould (3) and rear mould (4), front die (1) fixedly connected on front mould (3), rear die (2) fixedly connected on rear mould (4), front die (1) and rear die (2) form the mould cavity (5) after closing mould, be equipped with a plurality of exhaust passages on rear die (2), a plurality of exhaust passage are linked together with an exhaust passage (6), the junction of exhaust passage (6) and exhaust passage is located between rear mould (4) and rear die (2), one end of exhaust passage (6) away from exhaust passage is equipped with vacuum air pump (7). The utility model provides a kind of mould with air -exhaust function, which can remove air in the mould cavity completely, and avoid the appearance defects of product with air bubble and missing.

Description

Technical Field

[0001] This utility model relates to the field of molds, specifically a mold with an air extraction function. Background Technology

[0002] When producing injection molded products, all air inside the mold cavity needs to be expelled through the venting chamber to ensure the molding quality of the product and avoid bubbles or missing parts in the finished product. However, during the production process, some mold cavities used for molding products have complex structures that are difficult to form. When these structures are filled with injection molding material, it is not easy to fill them completely. As a result, venting through material filling does not completely remove the air from the mold cavity, making it easy for bubbles or missing parts to appear in the molded product. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a mold with an air extraction function that can completely remove air from the mold cavity and avoid appearance defects such as bubbles and missing parts in the product.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: a mold with a vacuum function, including a front mold core, a rear mold core, a front mold, and a rear mold. The front mold core is fixedly connected to the front mold, and the rear mold core is fixedly connected to the rear mold. The front mold core and the rear mold core form a mold cavity after mold closing. The rear mold core is provided with multiple exhaust channels, and the multiple exhaust channels are connected to an air outlet channel. The connection between the air outlet channel and the exhaust channel is located between the rear mold and the rear mold core. A vacuum pump is provided at the end of the air outlet channel away from the exhaust channel.

[0005] Compared with the prior art, the advantages of this utility model are as follows: by using a vacuum pump to extract the gas in the mold cavity, the air in the mold cavity can be quickly discharged, which avoids appearance defects such as bubbles and missing parts in the product and can also accelerate the molding speed of the product; the design of multiple exhaust channels can achieve the purpose of exhausting air in different areas of the mold cavity that are difficult to exhaust; the design of multiple exhaust channels connected to one exhaust channel can reduce the design of a vacuum pump, which can reduce production costs and reduce the space occupied by the mold.

[0006] As an improvement of this utility model, the mold with venting function includes an ejector pin, which is movably connected to the rear mold core. The venting channel includes an ejector pin venting channel arranged along the ejector pin. Through this improvement, the design of the ejector pin venting channel using the ejector pin structure can reduce the design of a dedicated venting channel. If a dedicated venting channel is designed, injection material may enter the channel, and during demolding, injection material may remain in the channel, which is difficult to clean and causes difficulties in venting during subsequent product production. However, by using the ejector pin structure, the injection material that has entered the ejector pin venting channel can be ejected during demolding, thereby avoiding the situation where injection material blocks the venting channel. At the same time, the ejector pin venting channel is also easier to clean and maintain.

[0007] As an improvement of this utility model, the diameter of the end of the ejector pin venting channel away from the mold cavity is larger than the diameter of the end closer to the mold cavity. With this improvement, the smaller diameter of the end of the ejector pin venting channel closer to the mold cavity increases the difficulty for the injection material to enter the ejector pin venting channel, thereby reducing the amount of injection material entering the ejector pin venting channel. During demolding, the ejector pin can more easily eject the injection material. The larger diameter of the end of the ejector pin venting channel away from the mold cavity can make the vacuum pump's suction effect better and the venting efficiency higher.

[0008] As an improvement of this utility model, the mold with the venting function includes an insert, which is inserted into the rear mold core. The venting channel includes an insert venting channel arranged along the insert. Through this improvement, the insert venting channel is designed using an insert structure, which can reduce the design of a dedicated venting channel. If a dedicated venting channel is designed, the injection material may enter the channel, and during demolding, the injection material may be left in the channel, which is difficult to clean and causes difficulties in venting during subsequent product production. However, by using the insert structure, the insert can be removed after demolding, and the injection material in the insert venting channel can then be cleaned and maintained.

[0009] As an improvement of this utility model, a limiting block is provided at the end of the insert away from the mold cavity, and a limiting groove that cooperates with the limiting block is provided on the rear mold core. A connecting hole for air circulation is provided at the connection between the limiting block and the limiting groove. One end of the connecting hole is connected to the insert exhaust channel, and the other end of the connecting hole is connected to the air outlet channel. Through this improvement, the installation of the insert and the connection between the insert exhaust channel and the air outlet channel are realized.

[0010] As an improvement of this utility model, the limiting block is fixedly connected between the rear mold and the rear mold core, thereby achieving the fixation of the insert. Attached Figure Description

[0011] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2 This is a cross-sectional view of the installation structure of the front mold core and the rear mold core of this utility model.

[0013] Figure 3 This is a schematic diagram of the exhaust channel structure of the ejector pin of this utility model.

[0014] Figure 4 This is a utility model Figure 2 Schematic diagram of the exhaust channel structure of the block in section A.

[0015] Figure 5 This is a utility model Figure 4 Enlarged structural diagram of section B.

[0016] Figure 6 This is a schematic diagram of the cross-sectional structure of the air outlet channel of this utility model.

[0017] Figure 7 This is a utility model Figure 6 Enlarged schematic diagram of the connection between the limiting block and the limiting groove in section C.

[0018] The figure shows: 1. Front mold core, 2. Rear mold core, 2.1. Limiting groove, 3. Front mold, 4. Rear mold, 5. Mold cavity, 6. Vent channel, 7. Vacuum pump, 8. Ejector pin, 9. Ejector pin vent channel, 10. Insert, 10.1. Limiting block, 10.2. Vent groove, 10.3. Connecting hole, 11. Insert vent channel. Detailed Implementation

[0019] The embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0020] like Figure 1-2 As shown, a mold with a vacuum function includes a front mold core 1, a rear mold core 2, a front mold 3, and a rear mold 4. The front mold core 1 is fixedly connected to the front mold 3, and the rear mold core 2 is fixedly connected to the rear mold 4. After the front mold core 1 and the rear mold core 2 are closed, they form a mold cavity 5. The rear mold core 2 is provided with multiple exhaust channels, and the multiple exhaust channels are connected to an air outlet channel 6. The connection between the air outlet channel 6 and the exhaust channel is located between the rear mold 4 and the rear mold core 2. A vacuum pump 7 is provided at the end of the air outlet channel 6 away from the exhaust channel.

[0021] like Figure 2 , Figure 3 As shown, the mold with the venting function includes an ejector pin 8, which is movably connected to the rear mold core 2. The venting channel includes an ejector pin venting channel 9 arranged along the ejector pin 8. The diameter of the end of the ejector pin venting channel 9 away from the mold cavity 5 is larger than the diameter of the end closer to the mold cavity 5.

[0022] like Figure 2 , Figure 4 , Figure 5 , Figure 7 As shown, the mold with the air extraction function includes an insert 10, which is inserted into the rear mold core 2. The exhaust channel includes an insert exhaust channel 11 arranged along the insert 10. A limiting block 10.1 is provided at one end of the insert 10 away from the mold cavity 5. The rear mold core 2 is provided with a limiting groove 2.1 that cooperates with the limiting block 10.1. A connecting hole 10.3 for air circulation is provided at the connection between the limiting block 10.1 and the limiting groove 2.1. One end of the connecting hole 10.3 is connected to the insert exhaust channel 11, that is, the connecting hole 10.3 is an extension hole of the insert exhaust channel 11. The other end of the connecting hole 10.3 is connected to the air outlet channel 6. The limiting block 10.1 is fixedly connected between the rear mold 4 and the rear mold core 2.

[0023] like Figure 6 As shown, when the insert exhaust channel 11 is located between the ejector pin exhaust channel 9 and the outlet channel 6, the insert exhaust channel 11 is connected to the ejector pin exhaust channel 9. The bottom of the insert 10 is provided with an air vent 10.2 for connecting the ejector pin exhaust channel 9 and the outlet channel 6. Correspondingly, if the ejector pin exhaust channel 9 is located between the insert exhaust channels 11, the air in the insert exhaust channel 11 can directly pass through the ejector pin exhaust channel 9 without additional processing design.

[0024] like Figure 1 , Figure 2 As shown, the ejector pin 8 is fixedly connected to the ejector pin plate 8. By driving the ejector pin plate 8, the ejector pin 8 can be driven to move. This technology is conventional.

[0025] The design of multiple exhaust channels and a vacuum pump ensures that air is completely removed from the mold cavity, preventing appearance defects such as air bubbles and missing parts, and improving the molding quality of the product.

[0026] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the scope of the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. A mold with a vacuum function, characterized in that: The mold includes a front mold core (1), a rear mold core (2), a front mold (3), and a rear mold (4). The front mold core (1) is fixedly connected to the front mold (3), and the rear mold core (2) is fixedly connected to the rear mold (4). The front mold core (1) and the rear mold core (2) form a mold cavity (5) after the mold is closed. The rear mold core (2) is provided with multiple exhaust channels, and the multiple exhaust channels are connected to an air outlet channel (6). The connection between the air outlet channel (6) and the exhaust channel is located between the rear mold (4) and the rear mold core (2). A vacuum pump (7) is provided at the end of the air outlet channel (6) away from the exhaust channel.

2. The mold with a vacuum function according to claim 1, characterized in that: The mold with the air extraction function includes an ejector pin (8), which is movably connected to the rear mold core (2), and the exhaust channel includes an ejector pin exhaust channel (9) arranged along the ejector pin (8).

3. A mold with a vacuum function according to claim 2, characterized in that: The diameter of the end of the ejector pin venting channel (9) away from the mold cavity (5) is larger than the diameter of the end closer to the mold cavity (5).

4. A mold with a vacuum function according to claim 1, characterized in that: The mold with the air extraction function includes an insert (10) which is inserted into the rear mold core (2), and the exhaust channel includes an insert exhaust channel (11) arranged along the insert (10).

5. A mold with a vacuum function according to claim 4, characterized in that: The insert (10) is provided with a limiting block (10.1) at one end away from the mold cavity (5). The rear mold core (2) is provided with a limiting groove (2.1) that cooperates with the limiting block (10.1). The connection between the limiting block (10.1) and the limiting groove (2.1) is provided with a connecting hole (10.3) for air circulation. One end of the connecting hole (10.3) is connected to the insert exhaust channel (11), and the other end of the connecting hole (10.3) is connected to the air outlet channel (6).

6. A mold with a vacuum function according to claim 5, characterized in that: The limiting block (10.1) is fixedly connected between the rear mold (4) and the rear mold core (2).

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