Efficient mechanical vacuum valve for die-casting die

Abstract

The utility model relates to the technical field of die-casting process, in particular to an efficient mechanical vacuum valve for a die-casting die, which comprises an oil cylinder body, an oil cylinder connecting block arranged at the output end of the oil cylinder body, a valve rod arranged below the oil cylinder connecting block, an exhaust groove arranged at one end of the valve rod far away from the oil cylinder body, and an exhaust passage arranged inside the valve rod. Vent holes are formed in the surfaces of the exhaust channels, the exhaust channels are in a circular truncated cone shape and are symmetrically arranged, the valve rod is slidably connected with a valve element body, exhaust ports are formed in the surface of the valve element body, and a vacuum valve body is arranged below the valve element body. By designing the exhaust passages with large sectional areas, the exhaust efficiency is remarkably improved, the exhaust passages are in the shapes of circular truncated cones and are symmetrically arranged, the design not only optimizes an airflow path and reduces airflow resistance, but also improves the uniformity and stability of exhaust, and meanwhile, the exhaust efficiency is greatly improved. The vent holes formed in the surface of the exhaust passage further increase the surface area of the exhaust passage, and air and oil smoke in the mold can be exhausted more quickly.

Description

TECHNICAL FIELD

[0001] The utility model relates to die casting process technical field, concretely relates to high -efficient mechanical vacuum valve for die casting mould. BACKGROUND

[0002] Die casting process is a kind of process method that molten metal is injected into mould cavity under high pressure and rapidly cools and solidifies to form the part or product of required shape, in the die casting process, the gas and impurities in mould cavity can significantly affect the quality of die casting, such as causing blowhole, shrinkage cavity and other defects, reducing the compactness and mechanical properties of die casting, therefore, developing a kind of high -efficient mechanical vacuum valve for die casting mould to effectively remove the gas and impurities in mould cavity in the die casting process becomes one of the key technologies to improve the quality of die casting.

[0003] The existing high -efficient mechanical vacuum valve for die casting mould extracts the air and impurities in mould through vacuum pump before die clamping of die casting machine, after die clamping, mechanical valve is quickly closed, ensure that a certain vacuum degree is formed in mould cavity, effectively avoid the influence of gas and impurities on the quality of die casting.

[0004] But the exhaust passage cross-sectional area of the existing high -efficient mechanical vacuum valve for die casting mould is small, is extremely easy to stick aluminum, stick dust, exhaust passage is prone to blockage, leading to the decline of exhaust effect. UTILITY MODEL CONTENTS

[0005] In view of the above-mentioned shortcomings of prior art, the utility model provides high -efficient mechanical vacuum valve for die casting mould, can effectively solve the problem of small exhaust passage cross-sectional area in prior art, extremely easy to stick aluminum, stick dust, exhaust passage is prone to blockage, leading to the decline of exhaust effect.

[0006] To realize above-mentioned purpose, the utility model is realized through following technical schemes:

[0007] The utility model provides high -efficient mechanical vacuum valve for die casting mould, including the oil cylinder body, the oil cylinder body output end is provided with the oil cylinder connecting block, the lower portion of oil cylinder connecting block is provided with valve rod, and the valve rod is provided with exhaust groove away from the one end of oil cylinder body, the inside of valve rod is provided with exhaust passage, the surface of exhaust passage is provided with air hole, the exhaust passage is circular platform and is symmetrically arranged, the valve rod is slidably connected with valve core body, the surface of valve core body is provided with exhaust port, and the lower portion of valve core body is provided with vacuum valve body.

[0008] Further, the one end of valve rod close to oil cylinder body is connected with steel ball seat.

[0009] Further, the lower portion of oil cylinder connecting block is provided with valve core connecting block, and the valve core connecting block is positioned and connected to valve core body through steel ball seat.

[0010] Further, the valve core connecting block is provided between the oil cylinder connecting block.

[0011] Further, the oil cylinder body is fixedly connected with an oil cylinder support, and the oil cylinder support is fixedly installed on the movable mold valve body.

[0012] Further, the oil cylinder support is fixedly installed on the movable mold valve body, and the movable mold valve body is provided below a fixed mold valve body.

[0013] Further, the oil cylinder body joint is fixedly connected with an oil cylinder signal rod connecting block, and the oil cylinder signal rod connecting block is in communication connection with the oil cylinder body.

[0014] Further, the exhaust channel is in communication with an exhaust groove, and the exhaust groove is communicated with a vacuum valve body.

[0015] Beneficial effects

[0016] Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects:

[0017] Firstly, the utility model discloses an exhaust channel with a large sectional area, which significantly improves the exhaust efficiency, and the exhaust channel is in the shape of a circular truncated cone and is symmetrically arranged, so that the air flow path is optimized, the air flow resistance is reduced, and the uniformity and stability of the exhaust are improved.

[0018] Secondly, the utility model discloses a valve rod and a valve core body, and the valve rod can automatically retreat into the valve core body under the impact of the aluminum liquid, and the exhaust channel is closed by the flange at the front end of the valve core body, so that the aluminum liquid cannot directly enter the exhaust channel, and the blockage of the exhaust channel is effectively prevented.

[0019] Thirdly, the utility model discloses an oil cylinder support fixedly installed on the movable mold valve body, which is convenient for opening and closing operation, and the movable mold valve body is arranged above the fixed mold valve body, so that good support and stability are provided, and the uniform distribution of raw materials and the pressure transmission in the forming process are facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0021] Figure 1 The structure diagram of the high-efficiency mechanical vacuum valve for die casting mold provided by the present application is shown in the figure.

[0022] Figure 2 For Figure 1 The structure enlarged schematic view of A in the figure.

[0023] Figure 3 The side view of the present application is shown in the figure.

[0024] Figure 4 The valve rod structure schematic view of the present application is shown in the figure.

[0025] The figure shows the following: 1, oil cylinder body; 2, oil cylinder connecting block; 3, cushion block; 4, valve rod; 5, valve core connecting block; 6, valve core body; 7, steel ball seat; 8, oil cylinder support; 10, vacuum valve body; 11, oil cylinder signal rod connecting block; 12, movable mold valve body; 13, fixed mold valve body; 14, exhaust groove; 15, exhaust passage; 16, exhaust port; 17, air hole. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical scheme in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] The present application will be further described below in combination with the embodiments.

[0028] The high-efficiency mechanical vacuum valve for die casting mold, refer to the attached Figures 1-4, including the oil cylinder body 1, the oil cylinder body 1 output end is provided with oil cylinder connecting block 2, the lower part of oil cylinder connecting block 2 is provided with valve stem 4, the end of valve stem 4 away from oil cylinder body 1 is provided with exhaust groove 14, the inside of valve stem 4 is provided with exhaust channel 15, the surface of exhaust channel 15 is provided with air hole 17, exhaust channel 15 is circular table shape and symmetrically arranged, valve core body 6 is slidably connected to valve stem 4, the surface of valve core body 6 is provided with exhaust port 16, the lower part of valve core body 6 is provided with vacuum valve body 10, the end of valve stem 4 close to oil cylinder body 1 is connected to steel ball seat 7, the lower part of oil cylinder connecting block 2 is provided with valve core connecting block 5, valve core connecting block 5 is positioned and connected to valve core body 6 through steel ball seat 7, wherein, steel ball seat 7 is provided with screw, spring and steel ball, the side of steel ball seat is screwed with screw, one end of spring is against screw, one end is against steel ball, steel ball is against valve stem 4, the force of spring is compressed by adjusting the force of screw, the pressure of steel ball on valve stem 4 is changed, so as to adjust the force of valve stem 4 back, wherein, the cross-sectional area of exhaust pipe is not less than 160mm2, valve core connecting block 5 is positioned and connected to valve core body 6 through steel ball seat 7, oil cylinder connecting block 2 and oil cylinder signal connecting block 11 are connected to the joint of oil cylinder body 1, gasket 3 is inserted between valve core connecting block 5 and oil cylinder connecting block 2, so as to tightly fit, after the mold is opened, the piston rod of oil cylinder body 1 is pulled back to realize demolding, at the same time, it is opened and reset under the constraint of aluminum liquid.

[0029] The valve core connecting block 5 and the oil cylinder connecting block 2 are provided with a cushion block 3, the oil cylinder body 1 is fixedly connected with an oil cylinder support 8, the oil cylinder support 8 is fixedly installed on the movable mold valve body 12, the oil cylinder support 8 is fixedly installed on the movable mold valve body 12, the movable mold valve body 12 is provided below with a fixed mold valve body 13, the oil cylinder body 1 joint is fixedly connected with an oil cylinder signal rod connecting block 11, the oil cylinder signal rod connecting block 11 is in communication connection between the oil cylinder body 1, the exhaust channel 15 is in communication with the exhaust groove 14, the exhaust groove 14 is communicated with a vacuum valve body 10, the valve rod 4 is installed in the valve core body 6, the concentricity is guaranteed by the positioning of the steel ball seat 7, the valve rod 4 is freely movable in the valve core body 6, and the valve rod 4 is closed and opened by the mechanical force of the aluminum liquid, the middle of the valve core body 6 is the exhaust channel 15, the side surface is provided with a threaded exhaust port 16, the air in the mold is discharged through the exhaust port 16, the cooperation between the valve rod 4 and the front end of the valve core body 6 is cylindrical cooperation, the rear end of the valve rod 4 is abutted by the steel ball seat 7, the valve rod 4 moves forward and backward in the valve core body 6, when the valve rod 4 moves to the front end of the valve core body 6, the exhaust groove 14 at the front end of the valve rod 4 is exposed at the flange at the front end of the valve core body 6, so that the air and oil fume in the mold are discharged from the mold through the exhaust channel 15, the valve rod 4 is impacted by the aluminum liquid and retreats into the valve core body 6, the flange at the front end of the valve core body 6 covers the exhaust groove 14 of the valve rod 4, so that the aluminum liquid is prevented from entering the exhaust channel 15, the oil cylinder support 8 is installed on the movable mold valve body 12, the oil cylinder body 1 is installed and fixed on the oil cylinder support 8, the movable mold valve body 12 is on the upper side, which is convenient for opening and closing operation, and the fixed mold valve body 13 is on the lower side, which can provide better support and stability, and is beneficial to the uniform distribution of raw materials and pressure transmission in the forming process.

[0030] Working principle: in use, the valve rod 4 is inserted into the cooperation hole of the movable mold valve body 12 together with the oil cylinder body 1, and then the mold is closed, when the die casting machine starts to press, the vacuum pump draws out the air and oil fume in the mold through the exhaust groove 14 at the head of the valve rod 4 and the exhaust channel 15, when the die casting machine finishes pressing, the aluminum liquid reaches the end vacuum valve body 10, first impacts the valve rod 4, the locking force of the valve rod 4 is greater than 1KG, the valve rod 4 retreats into the valve core after being impacted by the aluminum liquid, the flange of the valve core body 6 closes and seals the exhaust channel 15, after cooling and opening the mold, the oil cylinder body 1 drives the entire valve core body 6 to retreat, the valve rod 4 remains stationary due to the constraint of the aluminum, the valve core body 6 is pulled outwards by the oil cylinder body 1, after the designed stroke, the steel ball seat 7 is hung to the tail of the valve rod 4, the valve rod 4 is pulled out, the exhaust groove 14 on the surface of the valve rod 4 is exposed, the vacuum valve is opened, the entire vacuum valve is reset, and the above operation is repeated in the next mold cycle.

[0031] The above examples are only used to illustrate the technical solutions of the present application, and are not limiting; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can still be modified, or some technical features therein can be replaced equivalently; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-efficiency mechanical vacuum valve for die casting mold, comprising a cylinder body (1), characterized in that, The oil cylinder body (1) output end is provided with oil cylinder connecting block (2), the lower part of oil cylinder connecting block (2) is provided with valve stem (4), valve stem (4) is away from the end of oil cylinder body (1) and is provided with exhaust groove (14), the inside of valve stem (4) is provided with exhaust channel (15), the surface of exhaust channel (15) is provided with air hole (17), exhaust channel (15) is circular truncated cone and symmetrically arranged, valve stem (4) is slidably connected with valve core body (6), the surface of valve core body (6) is provided with exhaust port (16), the lower part of valve core body (6) is provided with vacuum valve body (10).

2. The high-efficiency mechanical vacuum valve for die casting mold according to claim 1, characterized by, The end of valve stem (4) close to oil cylinder body (1) is connected with steel ball seat (7).

3. The high-efficiency mechanical vacuum valve for die casting mold according to claim 1, characterized by, The lower part of oil cylinder connecting block (2) is provided with valve core connecting block (5), valve core connecting block (5) is positioned and connected to valve core body (6) through steel ball seat (7).

4. The high-efficiency mechanical vacuum valve for die casting mold according to claim 3, characterized by, The space between valve core connecting block (5) and oil cylinder connecting block (2) is provided with pad (3).

5. The high-efficiency mechanical vacuum valve for die casting mold according to claim 1, characterized by, Oil cylinder body (1) is fixedly connected with oil cylinder support (8), oil cylinder support (8) is fixedly installed on movable mold valve body (12).

6. The high-efficiency mechanical vacuum valve for die casting mold according to claim 5, characterized by, Oil cylinder support (8) is fixedly installed on movable mold valve body (12), the lower part of movable mold valve body (12) is provided with fixed mold valve body (13).

7. The high-efficiency mechanical vacuum valve for die casting mold according to claim 1, characterized by, The joint of oil cylinder body (1) is fixedly connected with oil cylinder signal rod connecting block (11), oil cylinder signal rod connecting block (11) is communicatively connected with oil cylinder body (1).

8. The high-efficiency mechanical vacuum valve for die casting mold according to claim 1, characterized by, Exhaust channel (15) and exhaust groove (14) are communicated, and vacuum valve body (10) is communicated with exhaust groove (14).

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