JPH0278501A - Releasing device of press molded product - Google Patents

Abstract

PURPOSE:To constitute the title device so that it is not only that release of a molded product can be performed swiftly but also that a press mold can be heated at a fixed press temperature immediately after mold release of the molded product by a method wherein a vacuum chuck is formed movably on the upper part of the press mold and the vacuum chuck is constituted by connecting the same with a cooling device of a mold by a holder and suction plate communicating with a vacuum source. CONSTITUTION:After completion of press molding, a top force 15 is raised and a vacuum chuck 21 is moved to the central part of a press mold by a pusher 10. Then a bottom force 16 is raised until directly before abutting of a suction plate 2 against a press molding surface 1b, a cooling plate 5 is brought into contact with the upper part of the bottom force 16, cooling is caused to flow through a cooling gas discharge port 12 and cooled suddenly. Then after separation of the cooling plate 5 from the upper part of the bottom force 16, the bottom force 16 is raised up to position where the suction plate 2 and molding surface 1b abut against each other, a vacuum pump is actuated, a press molded product 1 is sucked to the suction plate 2, the bottom force 16 is lowered to a material receiving position, the press molded product 1 is released from the bottom force 16, the vacuum chuck 21 is moved backward and the press molded product 1 is transferred to a depositary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a molded product ejecting device for stably and highly efficiently ejecting a press molded product from a press mold in hot press molding of precision optical parts and the like. .

[Traditional Keijutsu]

Conventionally, when a press material is supplied into a press mold or a heat-softened press material is molded in the press mold, the molded product is released from the press mold, as described in Japanese Patent Application Laid-open No. 59-20373.
As proposed in Publication No. 2, a method has been adopted in which a part of the press die is used both as a press material supply jig and an M-type jig.

However, in this conventional method, m of the press mold is used as a jig for releasing the press molded product as described above, and after being transported within the mold, it is divided in the radial direction, so the press material is separated from the press mold. There is a problem in that it takes time for the press die to be heated to a certain molding temperature after the molding temperature is supplied to n[, and therefore the time required for one molding process becomes longer. In addition, since a part of the press mold is used for supplying and releasing the glass material, it is necessary to replace the supply and mold release jigs when the shape of the molded product changes, etc. In addition to the high processing costs, it also took a lot of time to replace the press dies.

[Issues that Genmei tries to solve]

In the conventional method described above, the press material is supplied and released through a part of the press mold, and the press material pushed into the press mold is transported within the J mold during mold release. It takes time for the press mold to be heated to the predetermined molding temperature, so the time required for one molding is long.
In addition, there were other problems such as high press mold processing costs.

In view of the dirt, the present invention separates the press mold from the material supply and mold release device, and the mold release device is equipped with a mold cooling device to enable rapid cooling of the mold. It is an object of the present invention to provide a device for taking out a press-formed product, which can quickly release the mold and heat the press mold to a predetermined pressing temperature immediately after the molded product has been released, thereby improving productivity. This is what I did.

[Means to solve the problem]

Therefore, in the present invention, as a means for quickly taking out a press-formed product from the press mold without impairing shape accuracy,
Instead of using the conventional method of using a part of the press mold, a vacuum suction type mold release device consisting of a vacuum chuck is installed separately from the press mold. Then, a vacuum chuck was formed on the upper part of the lower mold after the upper mold of the press mold was raised so as to be able to enter and leave the mold release device, and the vacuum chuck was connected to the mold cooling device and the vacuum source. It consists of a suction plate that suctions and fixes the holder and the press-formed product, and a bellows that connects the holder and the suction plate, allowing efficient mold release and cooling of the molded product, and reducing the bottom shape each time. It can save time.

[Effect]

As shown in FIG. 8, on the lower mold 16 heated to a predetermined temperature,
After the press material 1a heated to a predetermined temperature is fed and heated to the press temperature, the upper mold 15 is guided into the body chamber 17, and is lowered and pressed as shown in FIG. 6. After pressing, the upper mold 15 is raised as shown in FIG. 7, and then the vacuum chuck 21 enters onto the lower mold 16.

At the same time that the lower mold 16 rises until the curved surface 1b of the molded product 1 comes into contact with the suction plate 2, the cooling plate 5 contacts the lower mold 16, and cooling gas flows from the cooling gas discharge port 12, cooling the upper part of the lower mold. It is cooled to a predetermined temperature by the plate 5 and cooling gas. When the cooling is completed, the cooling plate 5 is separated, the cooling gas stops, the lower mold is raised again, the suction plate 2 comes into contact with the curved surface 16 of the molded product 1, and vacuum suction is performed via the vacuum source. After the lower die 16 is retracted to a predetermined position, the vacuum chuck 21 is retracted and the press-formed product l is transferred to a molded product storage location (not shown). A press molded product 1 is stored. The heating of the press mold is started immediately after the press molded product 1 is released from the mold.

The above operation is repeated.

〔Example〕

Hereinafter, the uninvented mold release device for press-molded products will be explained using examples. In the non-implemented examples, a vacuum suction method is used to release the press-formed product from the press mold, and in the case of a suction chuck used at room temperature, the part that comes into contact with the molded product generally has elasticity of the rubber product. This makes it easy to maintain a vacuum state. However, the mold release device of the non-example is used in a high temperature range of 450 DEG C. to 550 DEG C., and thus cannot be used with the above-mentioned rubber products.

Therefore, the material of the suction chuck of the female mold device is a heat-resistant material such as stainless steel or carbide, and the shape of the contact part is made to approximate that of the molded product to maintain the vacuum state between the press-formed product and the vacuum chuck. I'm making it easy. A metal bellows and a cooling device are installed in a part of the vacuum chuck,
By using the degree of freedom of the bellows, the pressed product can be stably sucked even if the mutual positions of the vacuum chuck and the press-formed product are misaligned, and the cooling plate is in contact with the mold, and the cooling gas is By blowing, the mold and press-molded product can be rapidly cooled from the press-molding temperature to the take-out temperature.

Details will be explained below with reference to FIGS. 1 to 5.

Figure m1 is a front sectional view, Figure 2 is a front view from the ■-1 arrow in Figure 1, Figure 3 is a view from the A arrow in Figure 1, and Figure 4 is a person's arrow in Figure 1. FIG. 6 is a perspective view of the cooling plate in an open state; Fifth
The figure is a view taken along arrow B in FIG.

In the figure, 1 is a press-formed product, 2 is a suction plate of a release device for taking out the press-formed product 1 from the press mold, 3 is an elastic bellows, and 4 is a suction 7u with a bellows 3.
a holder equipped with a cooling gas outlet for fixing the plate 2;
is a cooling plate split in two, 6 is a link, 7 is a pin, 8 is a stopper, 9 is a connecting joint, 10 is a button (1), 1
1 is Butsusha (2).

The pin 7a is fixed to the holder 4, and by horizontally moving the bushing (2) 11, the two-piece cooling plate 5 can be opened and closed as shown in FIG.

13 is a water cooling jacket provided in the cooling plate; 14 is a flexible tube for passing water through the cooling plate 5; 10
1 is a bushing (1) having a middle hole 10a for gas communicating with the holder 4 and a top hole 10b for cooling gas.

Note that the inner diameter of the cooling plate 5 in the closed state is the same as the outer diameter of the lower mold.

One end of the bushing (1110) is connected to the #jAMJ structure (not shown), moves horizontally, and
0a (a vacuum pump mechanism for vacuum suction is not shown).

Incidentally, FIGS. 6 to 8 are explanatory diagrams of operations from press molding in a press mold to taking out and storing a molded product in this embodiment. 6 to 8, 15 is an upper mold for molding the press material 1a, 16 is a lower mold, 1
Reference numeral 7 denotes a hot-water resistant material for guiding the upper mold 15 and lower mold 16 when they move up and down during press molding. 18 is a base for fixing the molten metal resistant 17 to a press device (not shown), and 19 is a bolt for fixing the molten metal resistant 17 to the base 18. 22
is a pusher (31) for supplying the press material 1a into the press die.

In the above structure, the method for removing and transporting the press-formed product l from the press mold will be described below.

The first step is to take out the press-formed product 1 from the press mold and release it from the press mold.
Adsorption plate 2, bellows 3, and holder 4 of the mold release device shown in the figure
, a cooling plate 5, a link 6, a pin 7, a stopper 8, a joint 9, and a butcher 1110. In order to adsorb the press-formed product 1 to the suction plate 2, the suction plate 20) is connected to a vacuum pump through the suction hole 4a provided in the holder 4 and the hollow hole tOa of the pusher 100, and the conical surface 2a and the press-formed product 1 are connected to the suction plate 20). This is done by creating a vacuum between the two. The shape of the suction plate 2 is such that the conical surface 2a approximates the curved surface of the press-formed product 1.

When the bellows 3 suctions the press-formed product 1 with the suction plate 2, even if the centers of the suction plate 2 and the press-formed product 10) are slightly misaligned, the conical surface 2a of the suction plate 2 will touch the curved surface of the press-formed product 1. to allow proper contact with the
Or it can be expanded and contracted. In addition, the materials of the suction plate 2, bellows 3, holder 4, cooling plate 5, link 6, pin 7, stopper 8, flexible tube 14, pusher (1) 10, and pusher (2+11) cannot be used at high temperatures. Uses a heat-resistant alloy material that can be used for any purpose.

FIG. 6 shows the positional relationship between the press mold during press molding and the vacuum chuck 21 of the take-out device. In this case, the press molded product 1 is formed between the upper mold 15 and the lower mold 16 of the press mold. The temperature of the press mold during press molding is approximately 6300° C., for example, for the optical material PX3.

FIG. 7 shows the positional relationship between the press mold and the vacuum chuck 21 when the press molded product 1 is released from the press mold after press molding. When the press forming is completed, the upper mold 15 is raised to a predetermined position, and then the vacuum chuck 21 is moved to the button +1
110, an opening 17a is provided in the middle part of the press mold molten metal 17 perpendicularly to the axial direction.

17b and move to the center of the press mold. Next, when the lower die 16 rises until just before the suction plate 2 and the press forming surface 1b come into contact, the bushing +2+ 11 is pulled in the direction of the horizontal arrow, the cooling plate 5 comes into contact with the upper part of the lower die 16, and the cooling plate 5 is brought into contact with the upper part of the lower die 16. Cooling gas flows from the gas discharge port 12, and in this state, the temperature at which the molded product can be released from the upper part of the lower mold is approximately 450°C.
Cool rapidly. Next, the pusher +2111 is pushed in the opposite direction to the horizontal arrow, and after the cooling plate 5 is separated from the upper part of the lower mold 16, the lower mold 16 is raised to a position where the suction plate 2 and the molding surface 1b come into contact. Next, the vacuum pump of the mold release device is operated to suck the press-formed product 1 onto the suction plate 2. After layering, the lower die 1b is lowered to the material receiving position, and the press-molded product 1 is released from the lower die 16. and vacuum chuck 21
When the press-formed product 1 is moved back in the direction of the arrow in FIG. 8 and the press-formed product 1 is transferred to a storage location (not shown), the vacuum pump of the mold release device is stopped and gas is introduced into the suction section 4a to be stored. The press molded product 1 is stored in the location.

During the series of operations shown in Boxes 6 to 8 described above, the press rope material 1a is supplied to the press die. Before supplying the material 1a into the press mold, the material 1a is heated in advance to about 450° C., which is the temperature for taking out the molded product, using another heating furnace (not shown). Then, using the pusher (3+22),
It is electrically transferred while being rolled on the chute 20 in FIG. 8 in the direction of the arrow in the figure, and inserted into the upper part of the lower die 16 in the press die through the opening 17b of the barrel chamber 17. The operation of supplying the press material 1a into the press mold can be performed immediately after the vacuum chuck 21 and the press-formed product l are separated from the press mold in the state shown in FIG. Further, the heating operation of the press mold to the press molding temperature is also carried out in the above-mentioned state.

As described above, by repeating the series of steps shown in FIGS. 6 to 8, the press-molded product 1 formed in the press mold can be continuously released from the mold and stored in the storage section.

As described above, in the mold release device for press-formed products of this embodiment, the press mold is provided with a mold release device consisting of a vacuum chuck of a separate structure, and this vacuum chuck is movably formed on the top of the press mold. At the same time, this vacuum chuck is composed of a mold cooling device, a holder connected to a vacuum source, a suction plate for stratifying and fixing the press-formed product, and a bellows for connecting the holder and the suction plate. Subsequent cooling of the mold can be performed rapidly, and since cooling is performed only in the necessary part of the upper part of the mold, the can mold can be heated quickly and efficiently, significantly shortening the molding cycle compared to conventional methods. Moreover, the electricity cost for heating can be significantly reduced. In addition, by providing a residual bellows,
Even if misalignment or inclination occurs between the suction plate and the press-formed product, it remains stable because the conical surface of the suction plate properly contacts the curved surface of the press-formed product due to the bending or expansion and contraction of the metal bellows. Molded products can be adsorbed smoothly.

In addition, the press mold can be easily manufactured, reducing processing costs and reducing the time required to replace the press mold.

〔Effect of the invention〕

As described above, the mold release device for press-formed products of the present invention has the effect of significantly improving productivity compared to the prior art.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of an embodiment of an uninvented mold release device for press-formed products, Fig. 2 is a sectional view taken along the arrow ■-■ in Fig.
Figure 4 is a view from arrow A in Figure 1, Figure 3 is when the cooling plate is closed, Figure 4 is when the cooling plate is open, and Figure 5 is from arrow B in Figure 2. Figures 6 to 8 are explanatory views of the vacuum chuck press operation process shown in Figure 5g1. l...Press molded product 2...Adsorption plate 3...Bellows 4...Holder 5...Cooling plate
6...Link 7...Pin 8.
... Stopper 9 ... Joint 10 ... Button + l + 11 ... Button + 21 12 ... Cooling gas discharge port 13 ... Water cooling jacket 14 ... Flexible tube 15 ... Upper mold 16.
...Lower mold 17...Body chamber 18...Base 19 Bolt 20...Chute 21...
・Vacuum chuck 41 Figure 1 Asuba type product 4 Water holder I0. 7' Eagle, (
1) 2rIL 1 no opposition 5 Zn left p contradiction
11 Arnosi T ζ 2) j to ゛ loin ° 6
Rini 21 Vacuum Chittsu 7M2 figure closed figure 5 helmet 5 figure porridge 6 figure ↓ porridge figure 7

Claims (1)

[Claims] 1. A press-formed product is formed so as to be taken out from inside the press mold, and a vacuum chuck is formed on the upper part of the lower mold after the upper mold of the press mold is raised so that it can freely enter and leave, and , the vacuum chuck is comprised of a mold cooling device, a suction plate that suctions and fixes the holder and the press-formed product, which are communicated with a vacuum source, and a bellows that connects the holder and the suction plate. A mold release device for press-formed products.