JPH0137219B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a gas hardening mold making machine.

Conventionally, horizontally split gas hardening mold making machines have a sand blowing device and a gassing device installed above the mold that can be raised and lowered so that they can be taken in and out alternately. At the same time as the blowing device is retreated, the gashing device is moved in to press the gashing frame onto the upper surface of the mold and inject hardening gas from the sand blowing hole, but because the gashing frame moves laterally. It was necessary to use a flexible hose such as a rubber hose for the piping connecting the gas generator and the gas inlet of the gassing frame. Nowadays, explosive gases such as triethylamine are often used as hardening gases, and to prevent explosions, flexible hoses are often wrapped with a metal coating around the outside.
However, since the gashing frame moves sideways while dragging the rubber hose, it is difficult to handle the rubber hose, and the piping from the gas generator to the gashing frame becomes long, causing gasified triethylamine to liquefy again. And,
Alternatively, there were problems such as a long gutsuing time.

In addition, a stopper member is provided above the mold so that it can come into contact with the periphery of the upper surface of the mold to prevent the rising end of the mold, so it is necessary to increase the width of the mold accordingly. However, it was necessary to increase the size of the entire device, which was a problem from the viewpoint of compactness of the device and equipment cost.

The present invention aims to solve these problems.

The configuration of the present invention will be explained below based on examples. Reference numeral 1 designates a machine base, in which a clamp cylinder 2 is suspended and supported upward through an upper flange in the center of the machine base 1, and a piston rod 2a is fixedly connected to a support frame 3 having a U-shaped cross section. . A frame 5 is fixed to the upper surface of the support frame 3 via an O-ring 4, and a lower mold 6 is mounted on the frame 5.
is attached via an O-ring 7.

Further, within the support frame 3, an extrusion cylinder 8 is installed facing upward, and a support plate 9 is fixedly connected to the tip of the piston rod. The lower peripheral edge of the support plate 9 is attached to the upper surface of the support frame 3 with an O-ring 10.
An extrusion plate 12 is supported on the upper surface of the support plate 9 via a substrate 11, and a plurality of extrusion pins 13 are implanted in the extrusion plate 12. Reference numeral 14 denotes four support rods erected at the four corners of the upper surface of the machine base 1. The upper end of the support rod 14 has an opening 15 penetrating both the upper and lower sides, and one wall surface communicates with the opening 15. A gashing frame 17 equipped with a gas inlet 16 is fixedly installed, and a support member 18 is fitted and screwed into each support rod 14 at a lower position of the gashing frame 17. 19 is an upper mold equipped with a plurality of casting sand blowing holes 20, and a gutting frame 17 is formed by the lower mold 6.
It is supported by pressure on the lower surface via an O-ring 21, and when the lower mold 6 descends, it is received by the upper surface of the support member 18. 22 is a gas generator,
It is connected to the gas inlet 16 via a conduit 23 . Reference numeral 24 denotes a guide rail installed horizontally above the gashing frame 17. On the upper surface of the guide rail 24 at a position above the gashing frame 17, a crimp cylinder 26 is attached downward via a support base 25, and its piston rod A pressing member 27 is fixedly connected to the tip of 26a. In addition, two carts 29 and 30 whose ends are connected by a connecting pin 28 are mounted on the guide rail 24, and wheels 29 and 30 are mounted on the guide rail 24.
a, 30a so as to be movably engaged. Near both ends of the lower surface of one of the carts 29, a guide pin 3 is provided with large-diameter stepped portions 31a, 31a at the upper end.
Guide tubes 32, 32 into which 1, 31 are slidably inserted
is attached, and the guide pins 31, 31 have a lid member 33 fixedly connected to the lower end thereof, the lid member 33 having a size that can close the upper surface opening 15 of the gushing frame 17,
Compression springs 34, 34 are loosely inserted into the guide pins 31, 31 between the upper surface of the truck 29 and the large diameter stepped portions 31a, 31a, and the lid member 33 is connected to the guide pins 31, 31, 31 through the compression springs 34, 34.
31 is suspended and supported at the lower end. A cylindrical intermediate member 35 is attached to the center of the upper surface of the lid member 33, and is slidably fitted into the cart 29 and whose upper end protrudes above the cart 29. When the crimping cylinder 26 operates to push out the lid member 33 in the position, the lid member 33 is pushed down by the intermediate member 35 against the compression spring 34, and the O-ring 21a is placed on the upper surface of the opening 15 of the gashing frame 17. The opening 15 can be closed by being press-fitted airtightly through the opening 15.

In addition, a blow head 37 having a blow nozzle 36 protruding from the bottom surface is slidably fitted into the center of the other truck 30.
The guide tubes 38, 38 attached to the lower surface of the truck 30 are slidably inserted into the guide tubes 38, 38, and the upper surface of the truck 30 and the large-diameter stepped portion 39
The guide pins 41 and 41 have compression springs 40 and 40 loosely inserted between them and are fixedly connected and supported by the lower ends of the guide pins 41 and 41, respectively. 42 is a hopper shoot.

Next, the operation of the device configured as described above will be explained. With molding sand being supplied from the hopper chute 42 into the blow head 37, a traveling cylinder (not shown) is operated to move the blow head 37 above the gashing frame 17, and then the clamp cylinder 2 is operated and the support frame 37 is moved upward. Then, the lower mold 6 is raised together with the frame 5. With this operation, the lower mold 6 is moved to the support member 1.
While pushing up the upper mold 19 placed on 8,
The upper mold 19 is further elevated while still being overlapped with the upper mold 19, and the upper mold 19 is pressed onto the lower surface of the gashing frame 17 via an O-ring 21 in an airtight manner. Next, the crimping cylinder 26 is operated to push down the blow head 37 against the compression spring 40, and after the blow nozzle 36 is fitted into the casting sand blowing hole 20 of the upper mold 19, the blow head 37 is moved from the blow tank (not shown) to the blow nozzle 36. Compressed air is supplied to blow molding sand into the cavities of the upper and lower molds 19 and 6 to fill them.

Next, the crimp cylinder 26 operates in reverse to return the blow head 37 to its original state, and then the travel cylinder (not shown) operates in reverse to move the lid member 33 above the gashing frame 17. At the same time, the blow head 37 is
Move it directly below. Next, crimp cylinder 2
6 operates again and the lid member 3 is removed via the intermediate member 35.
3 is lowered against the compression spring 34 and is airtightly pressed onto the upper surface of the gashing frame 17 via the O-ring 21a, thereby closing the upper surface of the opening 15 of the gashing frame 17.

Next, when a hardening gas is supplied from the gas generator 22 to the opening 15 of the gashing frame 17 through the conduit 23 and the gas inlet 16, the hardening gas passes through the sand blowing hole 20 and enters the upper and lower molds 19, 6. The sand flows into the cavity formed by the sand and hardens the molding sand within the cavity. On the other hand, after passing through the molding sand in the cavity, the hardening gas passes through a small hole (not shown) that communicates from the surface of the lower mold 6 to the back side, and then passes through a conduit (not shown) that is connected to the side wall surface of the frame 5. The gas is sucked and collected through a gas recovery device (not shown). After a predetermined period of time has elapsed, the supply of curing gas is stopped. After curing gas supply is stopped, press cylinder 2
6 operates in reverse to raise the lid member 33 and return it to its original state, and the clamp cylinder 2 operates in reverse to lower the upper and lower molds 19 and 6. On the way, the upper mold 19 moves to the support member 18. Only the lower mold 6, holding the hardening mold, descends to the lowest end together with the support frame 3, frame 5, etc.

Subsequently, the extrusion cylinder 8 operates to push up the substrate 11 and extrusion plate 12 via the support plate 9, and extrude the extrusion pin 13 into the cavity of the lower mold 6, thereby pushing the hardening mold in the lower mold 6 upward. extrude next,
The hardened mold on the upper surface of the push-out pin 13 is taken out to the outside by a product take-out device (not shown). Thereafter, the extrusion cylinder 8 is operated in reverse, and the support plate 9, extrusion plate 12, etc. are lowered, and the extrusion pin 13 is returned to its original state, preparing for the next molding operation. Thereafter, repeat the above operation.

In the above embodiment, the lid member and the blow head were provided above the gashing frame so that they could be taken in and out alternately. A configuration may also be adopted in which only the member is provided between the gassing frame and the blow head so as to be able to come in and out.

As is clear from the above description, the present invention has the following effects. That is, since the rubber hose does not move together with the gutting frame, the rubber hose can be easily handled and the device can be made more compact.

Since the piping from the gas generator to the gassing frame can be shortened, gasified triethylamine, etc. will not be liquefied again, gassing time can be shortened, and productivity can be increased.

Since the fixed gutting frame prevents the mold from rising, there is no need for a stopper member to prevent the mold from rising, and the width of the mold can be reduced, making the entire device more compact. It has various advantages such as being able to reduce equipment costs and making a significant contribution to this type of industry.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of the present invention. 15: opening, 16: gas spout, 17: gashing frame, 19: upper mold, 33: lid member.

Claims (1)

[Claims] 1. Directly above a mold that can be raised and lowered, an opening whose opening surface is smaller than the top surface of the mold is provided through the upper and lower sides, and a gas outlet is provided on one wall surface to communicate with the opening. A frame-shaped gashing frame is fixedly arranged, and above the gashing frame, a lid member of a size that can close the upper surface of the opening is freely inserted and taken out.
A gas hardening type mold making machine characterized by being able to move up and down.