JPS6186060A - Pressure-casting device - Google Patents

Abstract

PURPOSE:To provide a pressure-casting device which reduces the size of the device and simplifies the device and can execute simultaneously the pressurization of a molten metal and the ejection of a product in an optimum position by actuating pressurizing pins and ejector pins with one pressing means and permitting at the same time the separate setting of the respective positions and number of the pressurizing pins and ejector pins. CONSTITUTION:The molten metal is poured by an injection cylinder 7 into a casting space 4 and an ejection cylinder 12 is actuated to advance the pressurizing pins 10 via a driving member 11 upon lapse of the prescribed time when the molten metal does not thoroughly solidify. The advancing pins stop when the pins contact with a movable member 13 fixing the member 11. The molten metal in the space 4 is pressurized as the pins 10 advance. The pressure casting is thus executed. A movable plate 5 is retreated to separate a movable molding flask 3 from a stationary molding flask 1 and the members 11 are again advanced by the cylinder 12 when the molten metal in the space 4 solidifies. The member 13 advances integrally and largely cooperatively with the member 11. The ejector pins 14 provided to the member 13 and the pins 10 provided to the member 11 advance integrally as well so that the pins 14 and the pins 10 eject the product from the space 4 inside.

Description

[Detailed Description of the Invention] "Industrial Application Field" The present invention relates to a pressure casting apparatus, and more specifically, a pressure pin that presses molten metal injected into a casting space, and a pressurizing pin that presses molten metal injected into a casting space. The present invention relates to a pressure casting device equipped with an extrusion pin for extruding a product.

``Prior Art'' Pressure casting equipment is usually equipped with a pressure pin that pressurizes the molten metal injected into the casting space and an extrusion pin that extrudes the molded product within the casting space. The pin and the ejector pin are actuated by a pressing means such as a separate cylinder.

In addition, conventionally, the pressure pin and the extrusion pin were used in common.

The molten metal in the casting space is pressurized by the common pin in the first stage of advancement by the pressing means, and then the product is pushed out by the common pin in the second stage of larger advancement by the pressing means. A pressure casting device is also known (Japanese Patent Publication No. 56-5620).

[Problem to be solved by the invention] However, in the former pressure casting device, the position and number of pressure pins and the position and number of extrusion pins can be set separately.
Although it is possible to pressurize the molten metal at the optimal position and extrude the product at the same time, it requires at least two pressing means, which has the disadvantage that the configuration is complicated and the equipment becomes large. Pressure casting equipment can be made smaller and simpler, but since the pressure pin and extrusion pin are common, it is difficult to simultaneously pressurize the molten metal and extrude the product at the optimal position. The molten metal is pressurized even at necessary positions, which may lead to undesirable results depending on the shape of the product.

"Means and Effects for Solving the Problems" In view of such circumstances, the present invention makes it possible to operate the pressurizing bottle and the pusher bottle with one pressing means, and at the same time, the position of the pressurizing pin can be adjusted. By making it possible to set the position and number of extrusion pins separately, this allows the equipment to be made smaller and simpler, and at the same time, it is possible to pressurize the molten metal and extrude the product at the optimal position at all times, regardless of the shape of the product. The present invention provides a pressure casting apparatus that can perform the following functions at the same time.

That is, in the present invention, the pressure pin is interlocked with a pressing means that moves the press pin forward via a drive member, and a movable member that is interlocked with the drive member and is moved forward in the forward direction is placed in front of the drive member with a predetermined gap. , and an ejector pin is attached to this movable member in parallel with the J-marked pressure pin,
During pressure casting, the pressing means advances the pressure pin within the gap to pressurize the molten metal in the casting space without operating the ejector pin, and when taking out the product, the driving member is moved beyond the gap. The driving member and the movable member are moved forward to interlock with each other, and the movable member is moved forward to push out the product from the casting space using the extrusion pin.

"Embodiment" The present invention will be described below with reference to the illustrated embodiment. In the figure, 1 is a fixed formwork fixed to a machine frame 2.

Reference numeral 3 denotes a movable formwork that is pressed against the fixed formwork 1, and when the movable formwork 3 is pressed against the fixed formwork 1, a sealed casting space 4 can be formed by both formworks 1.3. ing.

The movable formwork 3 is mounted on a movable platen 5 provided on the machine frame 2 so as to be movable back and forth, and the movable platen 5 is moved forward and backward by a cylinder (not shown). Further, the casting space 4 communicates with an injection sill 7 via a runner 6 formed in the fixed form l.

Between the movable formwork 3 and the movable platen 5, a driving member 11 provided with a required number of pressure pins 1O is provided so as to be movable forward and backward in the forward and backward direction of the movable platen 5. An extrusion cylinder 12 is attached as a pressing means for moving the cylinder 11 forward and backward. The two-legged pressure pin lO is disposed parallel to the forward and backward direction of the movable platen 5, and slides the movable member 13 and the movable formwork 3 disposed between the drive member 11 and the movable formwork 3. It can freely penetrate and protrude into the casting space 4. Moreover, it goes without saying that this pressure pin 1O is arranged at a suitable position for pressurizing the molten metal depending on the shape of the product.

The movable member 1'3, which is disposed with a required gap δ between the drive member 11 and the movable formwork 3, is movable forward and backward in the axial direction of the pressure pin 10. An extrusion pin 14 which slidably penetrates the movable formwork 3, protrudes into the casting space 4, and extrudes the product from there is provided in parallel with the pressure pin IO.

This extrusion pin 14 is arranged at a suitable position for extruding the product.

Further, a stopper 15 is provided on the front side of the movable member 13 in parallel with the pressure pin 10, and a pair of upper and lower stopper portions 16 is provided on the rear side in parallel with the pressure pin 10.
The front stopper 15 can slide through the movable formwork 3 and come into contact with the surface of the fixed formwork l, and the rear stopper part 18 can come into contact with the front surface of the movable platen 5.

By making the distance from the tip of the front stopper 15 to the rear end of the rear stopper part 16 match the distance between the contact surface of the movable formwork 3 to the fixed formwork l and the front surface of the movable platen 5, the movable platen 5 is advanced to press the movable formwork 3 against the fixed formwork l, the movable member 13 is clamped and fixed between the contact surface of the fixed formwork l to the movable formwork 3 and the front surface of the movable platen 5. I have to. Note that the means for fixing the movable member 13 to the movable formwork 3 is not limited to the structure described above, and any fixing means having an appropriate structure can be employed.

Further, the drive member 11 is composed of two members 2o and 21 in order to easily separate the connection between the pressure pin lO and the extrusion cylinder 12 for easy maintenance and inspection. 20 and 21 are formed into a comb-teeth shape and are engaged with each other, and a connecting pin 22 is inserted between both members 2o and 21 to connect them together. The connecting pin 22 is also passed through a slit 23 formed in the stopper portion 16 of the movable member 13 in the direction of the pressure pin 10.
DI! via the connecting pin 22 when the drive member 11 retreats! !
The #1 member 13 can be moved backward.

In the above configuration, first, a cylinder (not shown) is actuated to advance the movable platen 5, and together with this, the movable formwork 3 is advanced to bring the movable formwork 3 into pressure contact with the fixed formwork l. Then, as described above, the stopper 15 and stopper portion 16 of the movable member 13 come into contact with the fixed formwork l and the movable platen 5, so that the movable member 13 is fixed at the illustrated position. On the other hand, the driving member 11 is positioned at the retracted position shown in the figure by the extrusion cylinder 12, and the above-mentioned required gap δ is formed between the driving member 11 and the movable member 13.

In this state, the tip of the pressure pin lO provided on the drive member 11 is located at a position recessed by a predetermined amount from the surface of the movable formwork 3 forming the casting space 4, and the extrusion pin lO provided on the movable member 13 is The tip of the pin 14 is located at a position that substantially coincides with the surface of the movable mold 3 that forms the casting space 4.

When this state is reached, the molten metal is injected into the casting space 4 by the injection cylinder 7, and then, after the required time has elapsed for the molten metal to not completely solidify, the extrusion cylinder 12 is operated and the pressure pin 10 is moved through the drive member 11. advance. Pressure pin 10
The advancement stops when the drive member 11 comes into contact with the fixed movable member 13, and the advancement of the pressure pin 10 pressurizes the molten metal in the casting space 4 to perform pressure casting.

Thereafter, when a predetermined amount of time has elapsed since the pressure pin 10 was moved forward, the drive member 11 and the pressure pin 10 are retreated to their original positions by the extrusion cylinder 12.

When the molten metal in the casting space 4 solidifies, the movable platen 5 is moved back by a cylinder (not shown) to separate the movable formwork 3 from the fixed formwork 1, and when this state is reached, the extrusion cylinder 12 The drive member 11 is advanced. This driving member 11 comes into contact with the movable member 13, but at this time, the stopper 15 of the movable member 13 is not pushed forward by the fixed formwork l, so the movable member 13
1, the ejector pin 14 provided on the movable member 13 and the pressure pin 10 provided on the drive member 11 also move forward together, and the ejector pin 14 and the pressure pin 10 are used for casting. The product is extruded from within the space 4.

After the product is extruded from the casting space 4 in this way, the extrusion cylinder 12 moves the drive member 11 backward, and when the drive member 11 is retreated, the connecting pin 2 provided thereon
2 comes into contact with the end of the slit 23 of the movable member 13 and moves the movable member 13 back together, and the drive member 11
When the movable member 13 is retracted to the retracted end, the rear end surface of the stopper portion 16 of the movable member 13 comes into contact with the front surface of the movable platen 5.

"Effects of the Invention" As described above, according to the present invention, the pressure pin and the ejector pin can be operated by a common pressing means, and the position and number of the pressure pin and the position and number of the ejector pins can be adjusted. can be set freely, so the equipment can be made smaller and simpler, and at the same time, the pressurization of the molten metal and the extrusion of the product can be performed at the same time at the optimal position regardless of the shape of the product. is obtained.

[Brief explanation of the drawing]

The figure is a sectional view showing one embodiment of the present invention.

Claims (1)

[Claims] A plurality of molds forming a casting space, a pressure pin that pressurizes the molten metal injected into the casting space, and an extrusion pin that penetrates the mold and extrudes the product molded in the casting space. In the pressure casting apparatus, the press pin is interlocked with a pressing means for advancing the press pin via a drive member, and a movable member is provided in front of the drive member and is moved forward in the forward direction of the press pin. Arranged with a gap between
An extrusion pin is attached to this movable member parallel to the pressure pin, and during pressure casting, the pressure pin is advanced by the pressing means to pressurize the molten metal in the casting space, and when the product is taken out, the ejection pin is moved through the drive member. A pressure casting apparatus characterized in that a movable member is advanced to extrude a product from a casting space by the extrusion pin.