Mould interior vacuumizing device

Abstract

The utility model discloses a vacuumizing device in a mold, which belongs to the technical field of injection molds and comprises a mold base, a mold core mounted in the mold base, an insert mounted in the mold core, a lower surface of the insert contacted with the mold base, an air exhaust pipeline opened in the mold base, and an air inlet of the air exhaust pipeline communicated with the right lower part of the insert. An air outlet of the air exhaust pipeline is formed in the side face of the mold base and provided with a connecting air nozzle, and the connecting air nozzle communicates with an air exhaust opening of the air exhauster. The air exhausting device is suitable for mold injection molding, air in the cavity can be actively exhausted outwards, so that the cavity of the mold is in a vacuum state, and air trapping and unsaturated glue injection of a product caused by unsmooth air exhausting are avoided.

Description

Technical Field

[0001] The utility model relates to a vacuum pumping device inside a mold, belonging to the technical field of injection molds. Background Art

[0002] Injection molding is also called injection molding. It is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into complex-shaped parts. Injection molding is suitable for mass production and complex-shaped products. Figure 3 As shown, when the mold is injection molding, the air in the mold is pressed out of the cavity by relying on the pressure during injection molding. The product has deep ribs, which will cause poor exhaust, air entrapment, and poor glue filling in the product, making the product prone to air entrapment. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a vacuum extraction device inside the mold, which can actively extract the air in the cavity to form a vacuum state in the mold cavity, thereby avoiding the problem of air entrapment and insufficient glue filling in the product due to poor exhaust.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A vacuum extraction device for the interior of a mold comprises a mold base, a mold core is installed in the mold base, an insert is installed in the mold core, the insert is in contact with the mold base from below, an exhaust pipe is opened in the mold base, the air inlet of the exhaust pipe is connected to the bottom of the insert, the air outlet of the exhaust pipe is arranged on the side of the mold base and is installed with a connecting air nozzle, and the connecting air nozzle is connected to the exhaust port of a vacuum pump.

[0006] A sealing ring is arranged between the insert and the mold base, and the air inlet of the air extraction pipeline is located inside the sealing ring.

[0007] The mold base is provided with an annular groove for accommodating the sealing ring.

[0008] The air extraction pipeline is L-shaped and comprises a vertical portion and a horizontal portion which are connected.

[0009] The mold base and the mold core are fixed by a pin shaft.

[0010] A sealing pad is sleeved on the connecting air nozzle.

[0011] Sealant is applied between the outer wall of the connecting air nozzle and the inner wall of the air extraction pipe.

[0012] The radial cross section of the air extraction pipeline is circular.

[0013] The beneficial effects of the utility model: the utility model provides a vacuum pumping device inside the mold, an exhaust pipe is opened in the mold base, the air inlet of the exhaust pipe is connected with the bottom of the insert, the air outlet of the exhaust pipe is arranged on the side of the mold base and is equipped with a connecting air nozzle, the connecting air nozzle is connected with the exhaust port of the vacuum machine, when the mold is being formed, the air in the cavity can be directly discharged to the outside of the mold through the exhaust pipe at the bottom of the insert in conjunction with the exhaust device, so that the mold cavity forms a vacuum state, avoiding poor exhaust gas discharge resulting in trapped air and insufficient glue filling in the product, which is more conducive to product molding and glue flow, making product molding more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of a vacuum pumping device inside a mold of the utility model;

[0015] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the A position in the middle;

[0016] Figure 3 It is a structural schematic diagram of an injection mold in the prior art.

[0017] The reference numerals in the figure are as follows: 1-mold base; 2-mold core; 3-insert; 4-exhaust pipe; 5-connecting air nozzle; 6-pin shaft; 7-sealing ring. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are not intended to limit the protection scope of the present invention.

[0019] Example 1

[0020] The utility model discloses a vacuum pumping device inside a mold, comprising a mold base 1, a mold core 2 is installed in the mold base 1, an insert 3 is installed in the mold core 2, and the lower side of the insert 3 is in contact with the mold base 1, and this part is an injection mold structure in the prior art. The improvement of the utility model is that an air extraction pipeline 4 is opened in the mold base 1, the air inlet of the air extraction pipeline 4 is connected to the lower side of the insert 3, the air outlet of the air extraction pipeline 4 is arranged on the side of the mold base 1 and is installed with a connecting air nozzle 5, and the connecting air nozzle 5 is connected to the air extraction port of the air pump.

[0021] The working principle of the utility model is as follows: when the mold is being injected, the vacuum fan is turned on, and the vacuum fan exhausts air from the bottom of the insert 3 through the vacuum pipe 4, exhausts the air to the outside of the mold, and forms a vacuum state in the mold cavity.

[0022] The utility model can directly discharge the air in the cavity to the outside of the mold through the exhaust pipe at the bottom of the insert in conjunction with the exhaust device, so that the mold cavity forms a vacuum state, avoiding the problem of air entrapment and insufficient glue filling in the product due to poor exhaust, which is more conducive to product molding and glue flow, making product molding more stable.

[0023] Example 2

[0024] The utility model discloses a vacuum pumping device inside a mold, comprising a mold base 1, a mold core 2 is installed inside the mold base 1, and the mold base 1 and the mold core 2 are fixed by a pin 6. An insert 3 is installed inside the mold core 2, and the lower side of the insert 3 contacts the mold base 1, which is an injection mold structure in the prior art.

[0025] The improvement of the utility model is that an exhaust pipe 4 is opened in the mold base 1, the air inlet of the exhaust pipe 4 is connected to the lower part of the insert 3, the air outlet of the exhaust pipe 4 is arranged on the side of the mold base 1 and is equipped with a connecting air nozzle 5, and the connecting air nozzle 5 is connected to the exhaust port of the exhaust machine. The exhaust pipe 4 is L-shaped, including a vertical part and a horizontal part connected to each other, and the radial cross section of the exhaust pipe 4 is circular.

[0026] A sealing pad is provided on the connecting air nozzle 5 to improve the sealing effect between the connecting air nozzle 5 and the air suction port of the air pump. A sealant is applied between the outer wall of the connecting air nozzle 5 and the inner wall of the air suction pipe 4 to improve the sealing effect between the outer wall of the connecting air nozzle 5 and the air suction pipe 4.

[0027] A sealing ring 7 is provided between the insert 3 and the mold base 1, and the air inlet of the exhaust pipe 4 is located inside the sealing ring 7. The mold base 1 is provided with an annular groove for placing the sealing ring 7. The utility model can improve the sealing between the insert 3 and the mold base 1 by providing the sealing ring 7, prevent the air in the gap between the insert 3 and the mold base 1 from entering the exhaust pipe 4, and thus improve the exhaust effect.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vacuum device for the inside of a mold, characterized in that: The mold base (1) comprises a mold core (2) installed in the mold base (1), an insert (3) installed in the mold core (2), the insert (3) being in contact with the mold base (1) from below, an exhaust pipe (4) opened in the mold base (1), an air inlet of the exhaust pipe (4) being connected to the bottom of the insert (3), an exhaust pipe (4) being arranged on the side of the mold base (1) and being provided with a connecting air nozzle (5), the connecting air nozzle (5) being connected to the exhaust port of an exhaust fan.

2. The mold internal vacuuming device according to claim 1, characterized in that: A sealing ring (7) is provided between the insert (3) and the mold base (1), and an air inlet of the air extraction pipe (4) is located inside the sealing ring (7).

3. The mold internal vacuuming device according to claim 2, characterized in that: The mold base (1) is provided with an annular groove for accommodating the sealing ring (7).

4. The mold internal vacuuming device according to claim 1, characterized in that: The air extraction pipeline (4) is L-shaped, comprising a vertical portion and a horizontal portion that are connected.

5. The mold internal vacuuming device according to claim 1, characterized in that: The mold base (1) and the mold core (2) are fixed via a pin (6).

6. The mold internal vacuum device according to claim 1, characterized in that: The connecting air nozzle (5) is sleeved with a sealing gasket.

7. The mold internal vacuuming device according to claim 1, characterized in that: Sealant is applied between the outer wall of the connecting air nozzle (5) and the inner wall of the air extraction pipe (4).

8. The mold internal vacuuming device according to claim 1, characterized in that: The radial cross section of the air extraction pipe (4) is circular.

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