JPH0244923Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to low-pressure casting equipment, and more specifically, the platen in low-pressure casting equipment that can cope with distortion and malfunction caused by the heat of molten metal holding furnaces and molten metal. Regarding equipment.

(Prior Art) Generally, in low-pressure casting equipment, as shown in FIG. 1, a lower platen 4 to which a lower mold 3 is attached is provided above a holding furnace 2 installed on a column 1. There are four tie bars 5 on the lower platen 4.
An upper platen 6 is installed on the upper end of the tie bar 5, and an upper mold 10 is attached to the upper platen 6 via a cylinder 7, four holders 8, and four guide rods 9. A movable platen 11 is provided so as to be movable up and down. Therefore, the lower platen 4, the movable platen 11, etc. are thermally expanded due to heat conduction from the holding furnace 2 and heating by the molten metal, causing distortion or making it impossible to slide between the holder 8 and the guide rod 9. Therefore, in the past, the tie bars 5 and guide rods 9 were adjusted and fixed to the lower platen 4 and the lower moving platen 11 by providing gaps in consideration of thermal expansion. Adjustment based on the standard is required, and since the tie bar 5 and guide rod 9 are fixed to the lower platen 4 and movable platen 11, new problems such as distortion and malfunction occur when the temperature drops. is occurring.

(Purpose of the invention) This invention was made in view of the above circumstances.
It is an object of the present invention to provide a platen device for low pressure casting equipment in which the platen can be displaced relative to a tie bar or a guide rod in response to temperature changes in the low pressure casting equipment.

(Structure of the invention) Hereinafter, the structure of the invention will be described in detail based on drawings of embodiments. 2 to 4 illustrate the main parts of the present invention.

That is, guide rods 29, 29 are fixed to the cylinder 17 mounted on the upper platen 16, and slideably pass through the holders 18, 18 fixed to the upper platen 16, and the lower ends of the holders 18, 18 are fixed. A movable platen 21 is attached. A protrusion 31 having a larger diameter than the guide rod 29 is formed at the lower end of each of the guide rods 29, 29.
The movable platen 21 is installed on the protrusions 31, 31 via latching members 32, 32. A guide rod 29 is passed through the latching members 32, 32, and a guide rod 29 is inserted slightly in the diagonal direction of the movable platen 21. An extending oval hole 33 is formed between the guide rod 29 and the oval hole 33 on the inside of the movable platen 21 on a diagonal line.
The gap is formed by taking thermal expansion into account.

Further, as shown in FIG. 3, a movable platen 2
A key 34 oriented in one diagonal direction is embedded.

(Function of the invention) With this structure, when the movable platen 21 thermally expands due to heat conduction from the holding furnace 2 or heating by the molten metal in the holding furnace, the movable platen 21
The portion of the guide rod 29 connected to the protrusion 31 extends in the direction of orientation of the key 34, and accordingly, the locking members 32, 32 are also displaced in the direction of orientation of the keys 34, 34; There is a gap between the elliptical holes 33, 33 on the inside of the movable platen 21 in the diagonal direction, and the keys 34, 3
Since the guide rods 29, 29 are positioned on the movable platen 21 via the movable platen 21 through the movable platen 21, even if the movable platen 21 expands thermally, the guide rods 29, 29 will not be displaced or receive any lateral force, and only the latching members 32, 32 will be It will be displaced.

In the above embodiment, the case of joining the guide rod 29 and the movable platen 21 has been described, but the same operation and effect can be obtained even if it is applied to joining the tie bar 5 and the fixed platen.

(Effects of the invention) As is clear from the above explanation, according to the invention, the tie bars or guide rods and the platen are joined so that they can be displaced relative to each other in the diagonal direction of the platen. Since the position of the guide rod can be moved relatively, excellent effects such as distortion due to temperature rise and inability to slide the guide rod will not occur.

[Brief explanation of the drawing]

Fig. 1 is a front view of conventional low-pressure casting equipment, Fig. 2 is a partially sectional front view of the main parts of the present invention, Fig. 3 is a view taken from arrow A to A in Fig. 2, and Fig. 4 is a It is an enlarged view of arrow B-B of a figure. 21...Movable platen, 29...Guide rod, 32...Latching member, 33...Oval hole, 34...
…Key.

Claims (1)

[Scope of utility model registration request] At the lower end of the guide rod 29, the guide rod 2
9 is formed, and the protrusion 31 of the guide rod 29 is passed through the latching member 32 constituting the oval hole 33, and the latching member 32 is connected between the protrusion 31 and the platen 21. At the time of joining via the latching member 32, the oval hole 33 is oriented in the diagonal direction of the platen 21, and a gap is formed at the inner side of the diagonal direction of the protrusion 31.
and the protrusion 31 and the platen 21
The key 3 oriented in the diagonal direction is on the mating surface with the key 3.
4. A platen device for low pressure casting equipment, characterized in that 4 is buried therein.