CN204545365U - Mould vacuum extractor - Google Patents

Abstract

The utility model relates to a mold vacuuming device, which comprises a vacuum valve, an air extraction pipe and a sealing needle. The slide bar of the quick-change plate is connected to the quick-change plate, and one end of the quick-change plate is connected with a fixed plate. The oil cylinder is connected to the hydraulic station through the inlet and outlet, and the other end of the exhaust pipe is connected to the vacuum station. The outer wall of the sealing needle is connected to the vacuum valve. The inner walls match. The utility model has the advantages of simple use method, reasonable structure, good vacuuming effect, the vacuum degree is below 30MPa, and the use of the quick-change plate makes the maintenance and inspection of the vacuum valve easier, and the oil cylinder does not need to be dismantled, which reduces the damage to the oil cylinder , prolong the service life of the oil cylinder, and have the advantages of higher work efficiency.

Description

Mold vacuum device

technical field

The utility model relates to a vacuum device, in particular to a mold vacuum device.

Background technique

The mold vacuum device is used as an auxiliary equipment for the mold. The mold vacuum device can remove the air in the mold, reduce air trapping, chromatic aberration and improve porosity. At the same time, the vacuum device can improve the pressure flow direction in the mold, improve the fluidity of the aluminum liquid in the mold, and make the filling effect better, thereby improving the quality of the product.

Figure 3 shows the vacuum device currently used in the mold. The extraction time of this vacuum device cannot be controlled. If the time is too short and the negative pressure is not enough, the vacuum degree will be insufficient and the vacuum degree is above 50MPa, and the aluminum liquid will not reach the specified level. If the extraction time is too long, there will be too much aluminum liquid inhalation, resulting in the phenomenon that the aluminum liquid is blocked to the vacuum valve. Workers need to control it according to their personal experience. The quality of the product is very unstable and unavoidable. to guarantee.

In order to solve the problems existing in the prior art, people have carried out long-term exploration and proposed various solutions. For example, Chinese patent literature discloses a mold cavity vacuum pumping system [application number: 201220140238.0], which includes a mold cavity seal ring, a feed port, a feed port seal ring, an exhaust port and an air cap device. The cavity sealing ring is arranged on the periphery of the mold cavity, the inlet sealing ring is arranged on the periphery of the inlet, the exhaust port communicates with the vacuum pump through an exhaust channel, and the air cap device is used to control the exhaust The mouth communicates with the mold cavity. The above solution has improved some problems in the existing technology to a certain extent, such as the problem of incomplete vacuuming, but there are still problems: complex structure, high cost, each cavity needs to be equipped with a separate vacuum pump, and the molten metal is easy to enter Technical problems such as vacuum pipes.

However, the extraction time of the current ordinary vacuum valve cannot be controlled. If the time is too short, the vacuum degree will be insufficient. If the vacuum degree is above 50MPa, if the time is too long, the aluminum liquid will block the vacuum valve. It has been unable to meet the production and technical requirements. requirements, thereby affecting product quality and performance, and the current vacuum valve is easy to block, and the maintenance procedure is very troublesome. It is necessary to remove and disassemble the mold from the die-casting machine first, and then maintain and repair the vacuum valve, which will cause certain damage to the mold. The wear and damage of the mold shorten the service life of the mold, affect the quality of the product, prolong the production cycle of the product, and increase the manufacturing cost.

Contents of the invention

In order to overcome the deficiencies of the existing torsion test, a transmission valve plate pressing device with reasonable structure, good mold fixing effect, stable processing and improved production efficiency is provided.

The purpose of this utility model is achieved through the following technical solutions: a mold vacuum device, including a vacuum valve, an air extraction pipe and a sealing needle, the vacuum valve is connected with the sealing needle of the air extraction pipe and the sealing needle, and the sealing One end of the needle tail of the needle is connected with an oil cylinder, the oil cylinder is connected to the quick change plate through the slide bar of the quick change plate, a fixed plate is connected to one end of the quick change plate, and the oil cylinder is connected to the hydraulic station through the inlet and outlet, so The other end of the exhaust pipe is connected to the vacuum station, and the outer wall of the sealing needle matches the inner wall of the vacuum valve.

Compared with the prior art, the utility model has the following characteristics:

The method of use is simple, the structure is reasonable, the structure is reasonable, the vacuum effect is good, the vacuum degree is below 30MPa, and the use of the quick-change plate makes the maintenance and inspection of the vacuum valve easier, and there is no need to dismantle the oil cylinder, which reduces the damage to the oil cylinder and prolongs the life of the vacuum valve. The service life of the oil cylinder is extended, and the working efficiency is higher.

Description of drawings:

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is present vacuum pumping mechanism;

Labels in the figure: 1-vacuum valve, 2-exhaust pipe, 3-sealing needle, 4-oil cylinder, 5-quick change plate slider, 6-quick change plate, 7-fixed plate, 8-sealing needle, 9-hydraulic pressure station, 10-vacuum station.

Detailed ways:

    In order to deepen the understanding of the utility model, the utility model will be further described below in conjunction with the embodiments and accompanying drawings. The embodiment is only used to explain the utility model and does not constitute a limitation to the protection scope of the utility model.

As shown in Fig. 1, Fig. 2, Fig. 3 shows the specific embodiment of the utility model, a kind of mold vacuuming device: comprises vacuum valve 1, pumping pipe 2 and sealing needle 3, is connected with vacuum valve 1 The air tube 2 and the sealing needle 8 of the sealing needle 3 are connected with an oil cylinder 4 at one end of the needle tail of the sealing needle 3, and the oil cylinder 4 is connected to the quick-change plate 6 through the slide bar 5 of the quick-change plate. One end of the plate 6 is connected with a fixed plate 7, the oil cylinder 4 is connected to the hydraulic station 9 through the inlet and outlet, the other end of the exhaust pipe 2 is connected to the vacuum station 10, the outer wall of the sealing needle 8 is connected to the inner wall of the vacuum valve 1 match.

Fix the fixed plate of the vacuum device on the movable mold of the mold, and then install the vacuum valve in the mold core; the sealing needle needle is stuck in the vacuum valve, and the suction pipe is connected to the vacuum station to generate negative pressure when vacuuming , and then the oil cylinder pulls the sealing needle, which drives the outer wall of the sealing needle to be closely connected with the inner wall of the vacuum valve to form a seal. When the vacuum degree reaches below 50MPa, the oil cylinder driving the sealing needle is connected to the hydraulic station, and the vacuuming time is controlled by the solenoid valve.

The utility model has the advantages of simple use method, reasonable structure, good vacuuming effect, vacuum degree below 50MPa, and the use of the quick-change plate makes the maintenance of the vacuum valve easier, and does not need to dismantle the oil cylinder, which reduces the damage to the oil cylinder and prolongs the life of the vacuum valve. cylinder life.

The applicant further stated that the utility model uses the above-mentioned embodiments to illustrate the implementation method and device structure of the utility model, but the utility model is not limited to the above-mentioned embodiment, that is, it does not mean that the utility model must rely on the above-mentioned method and structure can be implemented.

Those skilled in the art should understand that any improvement of the utility model, the equivalent replacement of the implementation method selected by the utility model, the addition of steps, the selection of specific methods, etc., all fall within the scope of protection and disclosure of the utility model within.

The utility model is not limited to the above-mentioned embodiments, and all methods that use structures and methods similar to the utility model to achieve the purpose of the utility model are within the scope of protection of the utility model.

Claims (3)

1. A mold vacuuming device, characterized in that it includes a vacuum valve (1), an air extraction pipe (2) and a sealing needle (3), and the air extraction pipe (2) and a sealing needle (3) are connected to the vacuum valve (1). The sealing needle (8) of the needle (3) is connected to the oil cylinder (4) at the end of the needle tail of the sealing needle (3), and the oil cylinder (4) is connected to the quick-change plate through the slide bar (5) of the quick-change plate (6), a fixed plate (7) is connected to one end of the quick change plate (6), the oil cylinder (4) is connected to the hydraulic station (9) through the inlet and outlet, and the other end of the exhaust pipe (2) One end is connected to the vacuum station (10). 2. The mold vacuuming device according to claim 1, characterized in that: the outer wall of the sealing needle (8) matches the inner wall of the vacuum valve (1). 3. The mold vacuum device according to claim 1 or 2, characterized in that: the sealing needle (3) is a stainless steel sealing needle.