KR0180355B1 - Apparatus for pressing of vacuum mold - Google Patents

Abstract

It is an object of the present invention to provide a vacuum mold pressurizing device capable of achieving high quality while quickly and accurately performing a certain type of part such as a machine or a structure that can be manufactured as a vacuum mold.

The present invention for realizing this, the pressure means such as the first housing is provided with a regulator is installed so that the discharge of the liquid resin while controlling the degassing and pressurization of the material by the reduced pressure; And a casting means such as a second housing having a cavity formed therein so as to communicate while being installed below the first housing and having a cavity so that the liquid resin is supplied by the atmospheric pressure difference in a vacuum state at a reduced pressure. do.

Description

Pressurization Device of Vacuum Mold

The figure shows the pressurization apparatus of a vacuum mold.

* Explanation of symbols for main parts of the drawings

1: Pressurizing device 10: First housing

11 support 12 hook member

13: funnel 14: the first chamber

15: first vacuum chamber 16: regulator

17: first solenoid valve 18: first pressure reducing device

19 pressurization device 20 second solenoid valve

22: first communication pipe 23: third solenoid valve

24: connector 30: the second housing

32: fourth solenoid valve 33: second communication pipe

34: injection hole 35: mold member

36: second chamber 37: second vacuum pump

38: fifth solenoid valve

[Industrial use]

The present invention relates to a pressurizing apparatus for vacuum molds, and more particularly to a pressurizing apparatus for vacuum molds capable of achieving high quality while quickly and accurately performing certain types of parts such as machines or structures that can be manufactured with vacuum molds.

[Prior art]

In general, casting is to melt a metal, inject it into a mold prepared by properly designed, and solidify it into a desired shape. In order to make the mold, a model must be manufactured, which depends on the material used, but is mainly made of wood. This is used a lot.

When a model of the desired shape is produced by the wooden mold, the model is buried in the sand for molding, ie, the foundry sand, chopped, and the model is extracted.

It is usually called a mold that provides a passage in which molten metal flows and other parts necessary for casting, and is formed together with the product space in the space of the model.

Among the above-mentioned special casting methods, it is divided into die casting, centrifugal casting method, pressurized casting method, low pressure casting method, reduced pressure casting method, vacuum casting method and the like. The present invention relates to a pressing method of vacuum mold.

[Problem trying to solve the invention]

As described above, the present invention is an alternative method of injection molding, in which one chip or powder is melted and injected into a mold to mold small or large parts. Particularly, the manufacture of large parts consumes a lot of time, thereby increasing the accuracy of the resin. There is a problem that the production cost is increased by falling, thereby raising the cost.

It is an object of the present invention to provide a vacuum mold pressurizing device capable of achieving high quality while quickly and accurately performing a certain type of part such as a machine or a structure that can be manufactured as a vacuum mold.

[Means to solve the problem]

In order to realize this, the present invention includes a pressurizing means such as a first housing, in which a regulator is installed to control the discharge of the liquid resin while degassing and pressurizing the material by pressure reduction; It is installed on the lower side of the first housing is in communication with the vacuum mold pressurizing device comprising a casting means, such as a second housing formed in the cavity so that the liquid resin is supplied by the atmospheric pressure difference in the vacuum state by the reduced pressure do.

The first housing is supported by a hanger member of the support, the first chamber is installed with a funnel to supply the liquid resin, and the operation of the first vacuum pump to allow the defoaming of the liquid resin at the same time to discharge the atmospheric pressure in the first chamber The present invention provides a pressurization apparatus for a vacuum mold comprising a first pressure reducing device provided with a first solenoid valve to control the regulator.

The first housing includes a first chamber having a funnel to be supplied with liquid resin while being supported by a hanger member of the support, and a pressurizing device for supplying air to reduce the vacuum state in the first chamber to atmospheric pressure; The present invention provides a pressurization device for a vacuum mold including a depressurization device provided with a second solenoid valve for controlling supply and discharge of air by a regulator for adjusting the pressurization device.

The first housing includes a third solenoid installed to control the discharge of the liquid resin through the funnel supplied with the liquid resin and the first communication pipe installed downward in the funnel while being caught by the hook member supported by the support. The present invention provides a pressurization apparatus for a vacuum mold.

The second housing includes a fourth solenoid valve installed to communicate with the third solenoid valve installed on the lower side of the first housing by a connecting pipe so that the suction of the liquid resin is performed at the same time as the third solenoid valve to be controlled and opened. The present invention provides a pressurization apparatus for a vacuum mold.

The second housing is operated by a mold member having an injection port inserted to be communicated by a second communication tube installed in the fourth solenoid valve, and a regulator to reduce the vacuum in the second chamber in which the mold member is installed. And a second pressure reducing device including a second vacuum pump and a second pressure reducing device having a fifth solenoid valve controlled by a regulator such that the second vacuum pump discharges atmospheric pressure and maintains vacuum during vacuum. It is.

[Action]

According to the present invention, after supplying the liquid resin to the funnel installed in the first chamber of the first housing, the defoaming operation that is included in the liquid resin and causes the manufacture of defective products during molding is performed by bringing the first chamber into a vacuum state. Is discharged, and then the air is again brought to a predetermined atmospheric pressure state using a pressurization device.

The first housing is provided with a mold having a cavity connected to a second communication tube so that the liquid resin can be supplied in the second housing while maintaining a state in which atmospheric pressure is applied after the defoaming operation of the liquid resin is finished. Install.

After making the vacuum state by using the second pressure reducing device in the second chamber of the second housing in which the mold member is installed, and maintaining the shut-off state by using the fifth solenoid valve, the regulator installed in the first housing is operated to perform a third The liquid resin contained in the funnel by simultaneously opening the four solenoid valves and the cavity in the mold through the first communication tube, the connecting tube, and the second communication tube by the atmospheric pressure difference in the first chamber in the first housing and the second chamber in the second housing. It is possible to mold the cast product by filling in.

EXAMPLE

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the present invention will be described in more detail.

The figure shows a pressurization device of a vacuum mold according to the present invention, and the reference numeral 1 denotes the pressurization device.

The pressurization device 1 communicates with the first housing 10 having a regulator installed so that the discharge of the liquid resin is controlled while degassing and pressurizing the material by pressure reduction, and installed below the first housing. And casting means such as a second housing 30 having a cavity formed such that the liquid resin is supplied by the atmospheric pressure difference in a vacuum state under reduced pressure.

The first housing 10 includes a first chamber 14 in which a funnel 13 is installed to be supplied with a liquid resin while being supported by the hook member 12 of the support 11, and in the first chamber 14. The first pressure reducing device 18 provided with the first solenoid valve 17 for controlling the operation of the first vacuum pump 15 for degassing the liquid resin at the same time as the discharge of atmospheric pressure is installed. Consists of including.

The first housing 10 includes a first chamber 14 in which a funnel 13 is installed to be supplied with a liquid resin while being supported by the hook member 12 of the support 11, and in the first chamber 14. A pressurization device 19 for supplying air to reduce the vacuum state to atmospheric pressure and a second solenoid valve 20 for controlling supply and discharge of air by the regulator 16 for adjusting the pressurization device are provided. It consists of a pressurizing means 21.

The first housing 10 is discharged through the funnel 13 and the first communication pipe 22 installed downward in the funnel while being supported by the hook member 12 of the support 11 to supply the liquid resin. A third solenoid 23 is provided for controlling the controller 16 to be controlled by the regulator 16.

The second housing 30 is connected to the third solenoid valve 23 installed at the lower side of the first housing 10 as a connecting pipe 24 so that the suction of the liquid resin is performed by the adjuster 16. A fourth solenoid valve 32 is provided so as to be controlled to open simultaneously with the third solenoid valve 23.

The second housing 30 has a mold member 35 having a cavity 35C having an injection hole 34 inserted therein so as to communicate with the second communication tube 33 installed in the fourth solenoid valve 32. And a second vacuum pump 37 which is operated by the regulator 16 to depressurize the inside of the second chamber 36 provided with the mold member in a vacuum state, and the discharge of atmospheric pressure and vacuum by the second vacuum pump. And a second pressure reducing device 40 including a fifth solenoid valve 38 controlled by the regulator 16 so that the vacuum is maintained.

The action of the present invention made in this way is to supply the liquid resin to the funnel 13 installed in the first chamber 14 of the first housing 10, in order to eliminate the cause of the manufacture of defective products contained in the liquid resin After operating the first vacuum pump 15 of the first pressure device to discharge the atmospheric pressure in the first chamber 14, the vacuum state is set.

When the first chamber 14 is vacuumed and the defoaming operation is completed, the first chamber 14 is blocked by the first solenoid valve 17 using the regulator 16 and the first chamber is again used by the pressurizing device 19 which is the pressurizing device 21. (14) The interior is brought to a predetermined atmospheric pressure state.

As described above, the third solenoid valve 23 is continuously blocked to maintain the inside of the first chamber 14 of the first housing 10 under the atmospheric pressure. Accordingly, the mold member 45 having the cavity 35C formed in the second chamber 36 is installed in the second housing so that the liquid resin can be supplied and molded.

The lower end of the second communication tube 33 is inserted into the inlet 34 so that the liquid resin is filled in the cavity 35C formed in the mold member 35.

After installing the second communication tube 33 to the mold member 35, the air in the second chamber 36 of the second housing 30 is supplied to the second vacuum pump 37 of the second pressure reducing device 40. By using the regulator 16 made in a vacuum state to maintain the blocking state with the fifth solenoid valve 38.

As the fifth solenoid valve 38 maintains the state in which the second chamber 36 is blocked, the regulator 16 installed in the first housing 10 is operated to operate the first housing 10 and the second housing 30. The third and fourth solenoid valves (23) and (32) are installed in the c) by connecting to the connecting pipe (24) and installed in communication.

The first and second solenoid valves 23 and 32, which are installed to connect and install the first housing 10 and the second housing 30, are simultaneously opened, and the first chamber 14 in the atmospheric pressure state and the vacuum agent By connecting the two chambers 36 to each other, the liquid resin contained in the funnel 13 is formed by the pressure difference between the first chamber 14 and the second chamber 36. By filling the cavity 35C in the mold member 35 through the two communicating tubes 33, it is possible to mold the cast product.

[Effects of the Invention]

The present invention has an effect of easily molding a large part by dissolving chips or powders and injecting them into a mold by dissolving chips or powders as one of resin-based molding methods as an alternative method for injection molds.

In addition, it does not consume much time due to the manufacture of large parts, and there is an effect that the accuracy of molding is increased by vacuum pressing of the resin.

Accordingly, the molding of the resin by the pressurization device of the vacuum mold is a useful invention in which the manufacturing cost becomes low and thus the cost is reduced.

Claims (6)

Pressurizing means such as a first housing provided with a regulator such that defoaming and pressurization of the material by depressurization are performed and discharge of the liquid resin is controlled; And a casting means such as a second housing formed in a cavity so as to communicate while being installed below the first housing and to supply the liquid resin in a vacuum state under reduced pressure by an atmospheric pressure difference. 2. The first housing of claim 1, wherein the first housing is supported by the hanger member of the support and has a first chamber in which a funnel is installed so that the liquid resin is supplied, and the atmospheric pressure in the first chamber is simultaneously with the discharge of the atmospheric pressure in the first chamber. And a first pressure reducing device provided with a first solenoid valve for controlling the operation of the first vacuum pump for forming the fabric. 2. The first housing of claim 1, wherein the first housing is supported by a hanger member of the support and is provided with a first chamber having a funnel for supplying a liquid resin, and pressurizing for supplying air to reduce the vacuum in the first chamber to atmospheric pressure. And a pressurizing means provided with a device and a second solenoid valve for controlling supply and discharge of air by a regulator for adjusting the pressurizing device. According to claim 1, wherein the first housing is installed so as to control the discharge of the liquid resin through the funnel supplied with the liquid resin and the first communication pipe installed downward in the funnel while being caught by the hook member supported by the support A pressurization apparatus for a vacuum mold comprising a third solenoid. The method of claim 1, wherein the second housing is connected to the third solenoid valve installed in the lower side of the first housing in communication with the connecting pipe so that the suction of the liquid resin is controlled by the regulator so as to be controlled and opened simultaneously with the third solenoid valve. A pressurization device for a vacuum mold comprising a fourth solenoid valve installed. The method of claim 1, wherein the second housing is a mold member formed through the injection port is inserted into the communication by the second communication tube installed in the fourth solenoid valve and the inside of the second chamber in which the mold member is installed to reduce the pressure in a vacuum state. Vacuum mold including a second vacuum pump operated by a regulator and a second pressure reducing device provided with a fifth solenoid valve controlled by the regulator such that the second vacuum pump maintains the discharge of atmospheric pressure and vacuum during vacuum. Pressure device.