KR100980007B1 - Vaccum forming apparatus - Google Patents

Abstract

PURPOSE: A vacuum forming apparatus is provided to prevent the shrinkage and bubbling of resin since a heating pipe emits high heat from the upper end to the lower end thereof so that the resin may be cured from the lower part. CONSTITUTION: A vacuum forming apparatus(10) comprises a vacuum tank, multiple heaters(200), a moveable member, and multiple molds(400). The multiple heaters emit heat from the inside of the vacuum tank. The moveable member moves the heater inside the vacuum tank. The multiple molds are arranged between the heaters. The outer surface of a mold is pressed to the heater by the moveable member. Melted material is formed in the mold. The heater comprises a contact block(210) and a heating pipe(230).

Description

Vacuum Forming Equipment {VACCUM FORMING APPARATUS}

The present invention relates to a vacuum molding apparatus, and more particularly, to a vacuum molding apparatus capable of vacuum molding a plurality of molds into which a thermosetting resin is injected.

In general, injection molding is known as a method of molding plastic products (or parts). In the case of injection molding thermosetting resin, liquid injection molding (LIM: Liquid Injection Molding) is known in which a liquid thermosetting resin is injected into a high temperature mold to be thermoset. This method is a molding method in which a molten liquid raw material resin is injected into a mold, heated to a high temperature, and cured.

In recent years, in order to suppress the generation of bubbles in the cured raw material resin is molded in a vacuum state. To this end, a vacuum molding apparatus has been developed and used to inject and heat a resin after molding the mold into a vacuum tank.

1 is a longitudinal sectional view showing such a general vacuum forming apparatus.

Referring to FIG. 1, a general vacuum forming apparatus 1 has a structure in which heating members 3 are fixedly installed at both sides of a vacuum furnace 2, and a mold 4 is inserted between the heating members 3 to heat them. to be. The metal mold | die 4 is attached to the base plate 5, The base plate 5 is equipped with the mounting plate 6 and the heat insulating material 7 in which the metal mold 4 is mounted.

The vacuum forming apparatus 1 as described above has a structure in which the heating member 3 is spaced apart from the mold 4 in a state in which the heating member 3 is fixed to the vacuum furnace 2, thereby preventing direct heat transfer to the mold 4. Due to this structure, the vacuum forming apparatus 1 has a different heating time depending on the size of the mold 4 to be introduced. That is, since the heating time varies depending on the distance that the mold 4 is separated from the heating member 3, in particular, when the molds 4 of different sizes are simultaneously introduced, the heating members 3 and each of the molds 4 As the distance between the two different from each other there is a problem that the resin cured in the mold (4) is cured differently and the quality of the molded article is different.

In addition, since the temperature of the fixed heating member 3 is constant, the resin injected into the mold 4 may shrink during curing. That is, the resin injected from the upper part of the mold 4 and moved to the lower part has a constant upper and lower temperatures of the mold 4 heated by the heating member 3, and thus, in the case of thermosetting resins, the mold ( 4) Since the upper side inside forms a high temperature, shrinkage occurs as it hardens from the top.

When shrinkage occurs in the resin, the density of the cured resin is lowered and bubbles are generated, thereby degrading the quality of the molded article. The above problems cause partial discharge in the bubble area, especially when the electric product is molded, and furthermore, causes a crack in the bubble area.

On the other hand, since the heating member 3 is fixed and not movable, there is a disadvantage in that it is not in close contact with the mold 4. In order to bring the mold 4 into close contact with the heating member 3, only a mold 4 suitable for the width of the heating member 3 is introduced, or various vacuums in which the heating member 3 is fixed to match the size of the mold 4. Furnace (2) must be manufactured. As a result, it is difficult to mold various types of molds and excessive mold equipment is required.

In addition, there is a problem in that separate equipment such as a mounting plate 6 and a heat insulating material 7 for attaching the mold 4 is required, and the installation cost is increased.

The present invention was created to solve the problems of the prior art,

A plurality of heaters can be moved inside the vacuum tank so that the plurality of molds can be simultaneously formed while heating in close contact with a plurality of molds embedded in the vacuum tank, and can secure the maximum contact area with the molds. The purpose is to provide a vacuum forming apparatus in which a heater is configured in such a structure.

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In addition, another object is to provide a vacuum molding apparatus in which the heater partially generates heat at different temperatures and the resin injected into the mold is cured from below.

In particular, it is an object of the present invention to provide a vacuum forming apparatus configured to be movable in the orbital movement of the heater back and forth, left and right.

In addition, another object of the present invention is to provide a vacuum forming apparatus configured to control the height of a heater.

Another object of the present invention is to provide a vacuum forming apparatus capable of moving by pressing the side surface of the heater, and in particular, changing the length of the axial member.

In addition, the support plate on which the mold is mounted may vary depending on the size of the mold, and another object of the present invention is to provide a vacuum molding apparatus capable of heating the mold by heating with a heater.

One aspect of the present invention for achieving the above object is a vacuum molding apparatus for curing and molding a thermosetting resin in a vacuum state, the vacuum tank inside the vacuum; A plurality of heaters dissipating heat inside the vacuum tank; A moving member for moving the heater in the vacuum tank; And a plurality of molds disposed between the heaters, the outer surface of which is in close contact with the heater by the moving member, and a molten material is injected into the mold and molded. The heater is in close contact with the outer surface of the mold. Adhesion block; And a heating tube provided inside the adhesion block and arranged along the lower end from the upper end of the adhesion block and configured to generate heat by generating heat by an internal heat generating material therein.

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And it is preferable that the heat generating tube, by the heat generating material dissipates high temperature heat toward the lower end from the upper end of the contact block.

The moving member may include, for example, rails installed at both sides of the vacuum tank; Both ends of the moving shaft is fixed to the rail to move along the rail; And a hook moving along the moving shaft with one side connected to the heater.

The hook is, for example, a moving ring penetrates the moving shaft and moves along the moving shaft; Fasteners are fastened to the fixing ring provided in the heater; And a height adjusting device connecting the movable ring and the fastener to each other and adjusting the height of the heater while the length thereof is stretched and contracted.

The height adjustment port, the upper end is screwed to the movable ring, the lower end is screwed to the fastener, the upper end and the lower end is a stud bolt for adjusting the height of the heater in accordance with the rotation is formed threaded in the opposite direction It features.

The moving member further includes a press for pressing a side of the heater in the vacuum tank to move the heater hung on the moving shaft by the hook along the moving shaft.

The press is, for example, a holder installed on the side of the heater; And a pressing shaft configured to hold one end of the holder and press one side of the heater while the length thereof is stretched and contracted toward one side of the heater.

The pressing shaft may include a lead screw having one end inserted into the holder and moving; A fixed screw fixed to the vacuum tank at a distance from the lead screw; And a turnbuckle that connects the fixed screw and the lead screw and rotates to expand and contract the length of the lead screw.

In contrast, the press, the pocket is installed on one side of the vacuum tank in the form of the upper opening; And a pressure rod having one end inserted into and supported by the pocket, and the other end rotated about the pocket to press one side of the heater. The pressure rod may be symmetric to the pocket. A knuckle formed to support the pocket; And a rod extending from the knuckle to a predetermined length.

In addition, the multi-stage jaw installed in the vacuum tank and narrowed downward; And a base plate seated on the multi-stage with a width corresponding to the size of the mold to mount the mold and to generate heat by an internal heating material.

Vacuum forming apparatus according to an embodiment of the present invention as described above,

Since a plurality of heaters are provided to be movable and a plurality of molds are disposed between the heaters, a plurality of molds of various sizes can be formed at the same time, thereby increasing productivity by mass production and reducing equipment investment costs as well as cost. There is an excellent effect, and each heater is moved to be heated in a state of being in close contact with the outer surface of the mold, and since the heating tube is provided inside each heater, there is also an effect of generating heat to the contact surface of the contact block as a whole.

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In addition, the heater is a heating tube inside the tight block gradually radiates high temperature heat from the upper end to the lower end, the resin cured in the mold is cured from the bottom to prevent shrinkage and foaming to reduce the defective rate of the molded article. Furthermore, the high-density structure of the molded article is realized, thereby preventing the electric partial discharge and improving the physical impact strength.

In addition, the heater is moved up and down by the height adjusting opening, as well as before, after and left and right by the moving member consisting of the rail and the moving shaft has the effect that can be flexibly respond to the mold of various sizes and quantities.

In addition, the heater is not only easily moved by the press, there is an effect that can be stably in close contact with the mold.

In addition, since the base plate generates heat in a state corresponding to the size of the mold, there is an effect that the curing time of the molded resin can be shortened.

1 is a longitudinal sectional view showing a conventional vacuum forming apparatus.
Figure 2 is a perspective view showing a vacuum forming apparatus according to an embodiment of the present invention.
3 is a longitudinal sectional view showing the vacuum forming apparatus shown in FIG.
Figure 4 is a partial perspective view showing a moving member of the vacuum forming apparatus of the present invention.
FIG. 5 is a partial perspective view showing movement of a heater by the moving member shown in FIG. 4. FIG.
6 is a cross-sectional view of the vacuum forming apparatus shown in FIG.
7 is a partial perspective view showing an embodiment of a press of the present invention vacuum forming apparatus.
8 is a partial cross-sectional view showing another embodiment of a press.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known general functions or configurations will be omitted.

2 is a perspective view showing a vacuum forming apparatus according to an embodiment of the present invention, Figure 3 is a longitudinal cross-sectional view showing the vacuum forming apparatus shown in FIG.

Referring to FIG. 2, the vacuum molding apparatus 10 according to an embodiment of the present invention includes a vacuum tank 100, a heater 200 and a heater 200 provided in the vacuum tank 100. It includes a moving member 300 to move inside, and a mold 400 disposed between the heater 200 to cure the thermosetting melt.

The vacuum tank 100 is to be molded in a vacuum state by inserting the mold 400 therein, and includes a tank body 110 in which the vacuum is made and a door 130 for opening and closing the tank body 110.

The tank body 110 is preferably formed in a cylindrical shape, the support leg 111 is supported on the ground is coupled to the bottom.

The door 130 opens or closes the tank body 110. In some cases, the door 130 may be provided at both sides of the tank body 110. In addition, the door 130 is provided with a locking member (not shown) such as a clasp to completely seal the tank body 110.

The heater 200 is installed inside the tank body 110 to heat the mold 400 by dissipating heat, and the heater 200 is provided in plural as shown to heat both sides of the mold 400. .

Referring to FIG. 3, the heater 200 includes an adhesion block 210 and a heat generating tube 230.

The adhesion block 210 is formed of a material having high thermal conductivity, and preferably, the adhesion block 210 is manufactured in a plate shape, but is not limited thereto. The adhesion block 210 may be manufactured in a shape that may be in close contact with the mold 400. Here, the close contact block 210 is provided with a plurality of heating tubes 230 from the upper end of the inside downward. The heating tube 230 may be formed in the shape of a hole in the close block 210 or formed of a separate member such as a pipe may be coupled to the inside of the close block 210.

The heat generating tube 230 has a heat generating material emitting heat. The heating material may be composed of a heating element such as a heating wire, a heating rod, which is built in the heating tube 230, or alternatively, may be composed of a heat medium such as a liquid heat medium oil or steam flowing through the heating tube 230.

On the other hand, the above-described heating tube 230 is preferably a heat dissipating heat from the upper end to the lower end of the close contact block 210 by the heating material. This is to cure the thermosetting resin from the bottom of the mold 400 when the molten thermosetting resin is injected into the mold 400 to be described later.

For example, as shown in the enlarged view "A", the heat generating tube 230a at the top is 115 ° C heat, and then the heat generating tube 230b is 120 ° C heat, and then the heating tube 230c. It is preferable that the heat of 125 ° C is supplied to the heating tube 230d, and then the heat of 130 ° C is supplied as a differential temperature deviation to generate heat.

The moving member 300 moves the above-described heater 200 in the front and rear, left and right directions inside the tank body 110 to closely contact or space the mold 400, and the rail 310 and the moving shaft 330, And hook 350 is included.

As shown in the enlarged view "b", the rail 310 is installed along the longitudinal direction in the frame 113 provided on both sides of the tank body 110, and fixing brackets provided at both ends of the rail 310 ( 311 is fixed to the frame 113. Here, the lower portion of the fixing bracket 311 is provided with a height adjustment block 312 in some cases, by adjusting the number of the height adjustment block 312 to adjust the height of the rail (310).

The moving shaft 330 is a member moving along the rail 310 in a state coupled to the rail 310. The moving shaft 330 is coupled to the moving housing 331 provided at both ends is fitted to the rail (310). The moving housing 331 has a member such as a roller or a ball bearing ring therein and moves along the rail 310 together with the moving shaft 330.

Hook 350 connects the heater 200 to the moving shaft 330, and moves along the moving shaft 330 together with the heater 200, the hook 350 is the heater 200 described above one side It is connected to the top of the close block 210 of the other side is coupled to the moving shaft 330 is fitted.

Therefore, the heater 200 moves left and right along the moving shaft 330 by the hook 350 and moves forward and backward along the rail 310 by the moving shaft 330. The structure of the hook 350 is mentioned later.

On the other hand, the moving member 300 is provided with a press 370. The press 370 pressurizes one side surface of the heater 200 hung on the moving shaft 330 by the hook 350 to move the heater 200 along the moving shaft 330. Here, the press 370 will be described later.

The mold 400 is a cavity 401 having a predetermined shape is formed therein, and the molten thermosetting resin is injected into the cavity 401 and cured to be molded into a predetermined shape. The mold 400 is provided in plural and provided in the vacuum tank 100. In other words, the heaters are disposed and heated between the plurality of heaters 200, respectively.

On the other hand, the vacuum tank 100 is provided with a base plate 410 on which the mold 400 is placed. Like the heater 200 described above, the base plate 410 is provided with a heating tube that generates heat by a heat generating material therein to heat the mold 400. Here, the base plate 410 is seated on the multi-stage 411 is provided symmetrically on both sides of the lower portion of the vacuum tank 100. The multi-stage 411 is smaller in width toward the lower end, and the base plate 410 corresponding to the size of the mold 400 to be disposed is seated.

In addition, the vacuum tank 200 is provided with a fixed plate 390 on one inner side. The fixed plate 390 prevents the heater 200, which is pressed by one side by the press 370, from moving further. That is, the heater 200 is supported by the fixing plate 390 after the movement and no longer moves.

4 and 5 are partial perspective views showing the heater 200 moved back and forth, left and right by the moving member 300.

4 and 5, the hook 350 includes a moving ring 351 coupled to the moving shaft 330, a fastener 353 connected to the heater 200, and a height adjusting unit 352.

The movement ring 351 is fitted to the movement shaft 330 and moves along the movement shaft 330. The fastener 353 is connected to the fixing ring 354 provided on the top of the heater 200. Fastener 353 is formed so that the fixing ring 354 can be caught as shown.

Height adjustment 352 interconnects the moving ring 351 and the fastener 353 and the length is stretched to adjust the height of the heater 200 connected to the fastener (353).

Height adjustment port 352 has a screw portion formed at both ends, the moving ring 351 is screwed to the upper end, the fastener 353 is screwed to the lower end to interconnect the moving ring 351 and the fastener 353 do. Here, the movable ring 351 and the fastener 353, which are respectively screwed together, are screwed in opposite directions to each other, such that the movable ring 351 and the fastener 353 are spaced or closely adhered to each other by the rotation of the height adjuster 352. do. Therefore, the height adjustment port 352 adjusts the height of the heater 200 by the rotation.

That is, the heater 200 moves forward and backward along the rail 310 and moves left and right along the moving shaft 330, and is height-adjusted up and down by the hook 350.

Referring to Figure 6, the hook 350 is preferably provided with a pair of one heater 200 is connected to the moving shaft 330, respectively. That is, the moving shaft 330 to which the hook 350 is fitted has a configuration in which a plurality of heaters 200 are connected to a pair, and the moving shaft 330 to which the plurality of heaters 200 are connected is the length of the rail 310. In a plurality of directions.

7 is a partial perspective view showing the press 370 described above. Referring to FIG. 7, a holder 371 installed on the side of the heater 200 and a pressing shaft 380 connected to the holder 371 are included.

Here, the holder 371 is formed in a pocket shape and is installed on one side of the contact block 210 of the heater 200. And the pressing shaft 380 is connected to the holder 371, while the length is stretched to press the one side of the heater 200 to move the heater.

The pressing shaft 380 has a lead screw 381, one end of which is fixed to the holder 371, a fixing screw 382 fixed to the above-described vacuum tank 100 at a spaced apart state from the lead screw 381, and A turnbuckle 383 connects the lead screw 381 and the fixed screw 382 and stretches the length of the lead screw 381.

The lead screw 381 has a head 381a inserted into the holder 371 at one end thereof, and the other end is screwed to the turnbuckle 383. In addition, one end of the fixing screw 382 is fixed to the inner surface of the vacuum tank 100 and the other end is coupled to the turnbuckle 383 as shown. Here, the lead screw 381 is formed with a left screw thread, the fixed screw 382 is formed with a right screw thread is coupled to the turnbuckles 383, respectively. Accordingly, when the turn screw 381 rotates the turnbuckle 383, the lead screw 382 moves toward the fixed screw 382 or moves to the opposite side of the fixed screw 382, as shown by the broken line, and moves the close contact block 210 as described above. Let's do it.

The lead screw 381 is provided in various lengths and replaced as needed. That is, the lead screw 381 of a suitable length is used in consideration of the moving distance of the close contact block 210 that is different when the small size mold 400 is disposed or the large size mold 400 is disposed.

The operation of the vacuum molding apparatus for thermosetting resins of the present invention including the above-described components will be described.

The vacuum forming apparatus according to an embodiment of the present invention is used to mold a mold into which the molten thermosetting resin is injected in a vacuum state, and to simultaneously mold a plurality of molds.

First, a plurality of heaters 200 are coupled to each other by using the hook 350 on the movable shaft 330 that is movably coupled to the rail 310, and each heater 200 may move along the movable shaft 330. .

A plurality of molds 400 in which the molten resin is molded are inserted and disposed between the heaters 200, respectively. At this time, each heater 200 is moved to secure an installation space of the mold 400 between the heaters 200.

Here, when moving the heater 200 as described above may be moved by pushing the contact block 210 of the heater 200 using a manpower or a tool, the press provided in the moving member 300 of the present invention ( 370) to move. At this time, the turnbuckle 383 is rotated to move the close block 210 from the inside of the vacuum tank 100 to the left and right, and the lead screw 381 having one end screwed with the turnbuckle 383 rotates the turnbuckle. The holder 371 which is drawn out or drawn in from the 383 and is formed on the side of the contact block 210 presses and moves the side of the heater 200.

On the other hand, when moving the heater 200 in the longitudinal direction of the vacuum tank 100, if the close block 210 is pushed in the longitudinal direction of the rail 310, both ends are moved by the moving housing 331 The entire moving shaft 330 coupled to the rail 310 moves along. Therefore, the heater 200 moves back and forth inside the vacuum tank 100.

In addition, when adjusting the height of the heater 200 by rotating the height adjustment port 352 of the hook 350, the moving ring 351 coupled to the moving shaft 330 and the fastener connected to the heater 200 ( 353) is spaced apart or in close contact. Therefore, the heater 200 moves up and down inside the vacuum tank 100.

After the heater 200 is moved, a plurality of molds 400 are introduced. In this case, the mold 400 is disposed on the base plate 410 provided according to the size of the mold 400 to be inserted and seated on the multi-stage 411.

After the injection of the mold 400 is completed, the close contact block 210 of each heater 200 is in close contact with both sides of the mold 400. At this time, the turnbuckle 383 is rotated to move the close block 210 along the moving shaft 330 to the left and right inside the vacuum tank 100.

After the adhesion of the heater 200 is completed, the door 130 of the vacuum tank 100 is closed to bring the vacuum tank 100 into a vacuum state, and the molten thermosetting resin is injected into each mold 400.

After the molten resin is injected, each heater 200 dissipates heat to heat the mold 400, thereby curing the injected resin. At this time, a heat generating material such as a heat transfer tube or a heat medium oil radiates heat to the plurality of heat generating tubes 230 provided in the adhesion block 210 and heats them. At this time, the heat generating tube 230 dissipates high temperature heat from the top to the bottom to cure the resin injected into the mold 400 from the bottom. Here, the exothermic temperature of the heat generating tube 230 is heat generated at a temperature of 115 ~ 130 ℃ from the top to the bottom is cured from the lower portion where the injected resin is heated to a high temperature does not occur shrinkage phenomenon.

In addition, when the heater 200 heats the mold 400, the base plate 410 on which the mold 400 is mounted is simultaneously heated, and the heat generation temperature of the base plate 410 is lower than that of the close contact block 210. 130 degreeC which is an exothermic temperature is preferable.

On the other hand, when the heater 200 heats the mold 400 and pressurizes the resin inlet of the mold 400 by filling a gas such as gas or air into the inside of the vacuum tank 100 at a high pressure, bubbles are generated in the hardened resin. Prevented, the resin hardens into a dense, dense structure. The pressure of the gas to be pressurized here is preferably 7 kg / cm ² or more.

After the above process is completed, the door 130 is opened, the turnbuckle 383 is rotated to separate the contact block 210 from the mold 400, and then the mold 400 is taken out of the vacuum tank 100. . The molding is completed by removing the mold 400 and taking out the molded article.

On the other hand, Figure 8 attached shows another embodiment of the press 370 described above. Referring to FIG. 6, the press 370 is supported by inserting one end into a pocket 375 and a pocket 375 formed on one side of the vacuum tank 200, and the other end of the contact block 210 of the heater 200. It includes a pressure rod 377 for pressing one side.

The pocket 375 is installed at one side of the vacuum tank 200 in the form of an upper opening, and the pressure rod 377 is formed in a shape in which one end is symmetric to the pocket 375 and is inserted into the pocket 375. A rod 377b extending to a predetermined length from the 377a and the knuckle 377a presses one side of the contact block 210.

As shown in the figure, the knuckle 377a presses one side of the contact block 210 in a state in which the knuckle 377a is inserted and supported in the pocket 375, and when the knuckle 377a moves the contact block 210, an extension such as a hammer is extended. Then, the rod 377b is moved downward by hitting it.

Here, the rod 377b of the pressure rod 377 is manufactured in various lengths, and uses the pressure rod 377 suitable for the moving distance of the close block 210.

As described above, in the vacuum molding apparatus 10 according to the exemplary embodiment of the present invention, a plurality of heaters 200 may simultaneously vacuum-form a plurality of molds 400, and the heater 200 moves. Since the member 300 moves up, down, left, and right and moves up and down simultaneously, the member 300 can be heated in close contact with the mold 400 having various sizes.

While specific embodiments of the present invention have been described above by way of example, these are for illustrative purposes only and are not intended to limit the protection scope of the present invention. It will be apparent to those skilled in the art that various changes, substitutions, and alterations can be made therein without departing from the spirit of the invention.

10: vacuum forming apparatus
100: vacuum tank 110: tank body 130: door
200: heater 210: contact block 230: heating tube
300: moving member 310: rail 330: moving shaft
350: hook 351: movable ring 352: height adjustment
353: fastener 370: press 371: holder
380: compression shaft 381: lead screw 382: fixed screw
383: turnbuckle 375: pocket 377: pressure rod
400 mold 410 base plate 411 multi-stage

Claims (11)

In a vacuum molding apparatus for curing and molding a thermosetting resin in a vacuum state,
A vacuum tank having a vacuum inside;
A plurality of heaters dissipating heat inside the vacuum tank;
A moving member for moving the heater in the vacuum tank; And
And a plurality of molds disposed between the heaters, the outer surface of which is in close contact with the heaters by the moving member, and a molten material is injected into the molds and formed therein.
The heater,
A close contact block in close contact with the outer surface of the mold; And
And a heating tube provided inside the close block and arranged along the lower end from the upper end of the close block and generating heat by the heat generating material therein. delete The method of claim 1, wherein the heating tube,
Vacuum forming apparatus, characterized in that by the heat generating material to dissipate high temperature heat from the upper end to the lower end of the contact block. The method of claim 1, wherein the moving member,
Rails installed on both sides of the vacuum tank;
Both ends of the moving shaft is fixed to the rail to move along the rail; And
And a hook moving along the moving shaft with one side connected to the heater. The method of claim 4, wherein the hook,
A moving ring fitted to the moving shaft and moving along the moving shaft;
Fastener to which the fixing ring of the heater is fastened; And
And a height adjusting tool connecting the movable ring and the fastener to each other and adjusting the height of the heater while the length thereof is stretched and contracted. The method of claim 5, wherein the height adjustment mechanism,
The upper end is screwed to the movable ring, the lower end is screwed to the fastener, the upper end and the lower end is a thread formed in the opposite direction is a stud bolt for adjusting the height of the heater according to the rotation is vacuum forming Device. The method of claim 4, wherein
And a press for pressing a side of the heater in the vacuum tank to move the heater hung on the moving shaft along the moving shaft by the hook. The method of claim 7, wherein the press,
A holder installed on the side of the heater; And
One end is held in the holder, the pressing shaft for pressing the one side of the heater while the length is stretched toward one side of the heater; vacuum forming apparatus comprising a. The method of claim 8, wherein the pressure shaft,
A lead screw moving with one end inserted into the holder;
A fixed screw fixed to the vacuum tank at a distance from the lead screw;
And a turnbuckle connecting the fixed screw and the lead screw and rotating to stretch the lead screw. The method of claim 7, wherein the press,
A pocket installed at one side of the vacuum tank in an upper portion of an open shape; And
One end is inserted into the pocket is supported, the other end is rotated around the pocket to press the pressure side of the heater; includes;
The pressurized rod,
An annular knuckle inserted and supported in the pocket; And
And a rod extending from the knuckle to a predetermined length. The method according to any one of claims 1 or 3 to 10,
A multistage jaw installed in the vacuum tank and narrowed downward; And
And a base plate seated on the multi-stage with a width corresponding to the size of the mold to mount the mold and to generate heat by an internal heating material.

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