JPH0242381Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a device for clamping both sides of a vertically split sand mold formed by a molding machine and extruded in a continuous joint onto the top surface of a pouring table.

Conventional technology Conventionally, a vertically split sand mold made by a molding machine is extruded in a continuous joint shape onto a pouring table with a fixed liner and a movable liner on the upper surface, and the sand mold rows are moved intermittently, and the front and back joints of each vertically split sand mold are created. Molten metal is poured into a mold hole formed on the surface.

Problems that the invention aims to solve However, when pouring molten metal into the mold cavity,
The vertically split sand mold expands and is likely to cause leakage or damage from the front and rear joint surfaces of the sand mold. Therefore, the volume of the mold hole for casting is limited relative to the sand mold, and the wall thickness must be increased. There were some unavoidable flaws.

In order to solve these problems, the present invention is a device in which both sides of a row of vertically divided sand molds, which are intermittently transferred on the top surface of a pouring table, are clamped with a large number of clamp plates using air springs. The present invention is characterized in that it prevents expansion of the vertically split sand mold and leakage of molten metal during pouring, and further increases the casting volume by reducing the wall thickness of the mold hole.

Means for Solving the Problems The configuration of the present invention will be described below with reference to the drawings.

A plurality of pairs of front and rear columns 1, 1 facing each other are erected at appropriate intervals in the left and right direction, and a frame body 2 is constructed on the upper end of each of the front and rear columns 1, 1. The fixed liners 3a arranged in parallel in the direction are erected, and the leg plate 6 is inserted into the gap between each fixed liner 3a from the upper surface of the movable frame 5 mounted on the upper surface of the eccentric shaft 4 supported by the front and rear columns 1, 1 facing each other. Protruding each leg plate 6
A movable liner 3b is installed on the upper end of the frame 2.
A first extrusion cylinder 7a for lateral guidance of the moving frame 5 is provided on the lower surface near the end, and a front and rear support 1 near the first end is provided.
A second extrusion cylinder 7b for rotating each eccentric shaft 4 supporting the movable frame 5 is installed on a base frame 8 constructed on the base frame 8, and the movable liner 3b is moved up and down and moved forward and backward in the gap of the fixed liner 3a. In the pouring table 9, arm rods 10 are provided protruding from the frame 2 at the front and back positions of the upper ends of the other front and rear columns 1, 1, except for the front and rear columns 1, 1 near one end.
The upper ends of the front and rear hanging frames 11, 11 are pivotally connected to
A more protruding arm rod 13 is pivotally connected to the front and rear lower horizontal frames 1.
2, 12, a large number of front and rear clamp columns 14, 14 are erected facing each other, and each of the front and rear clamp columns 14,
14 are connected by front and rear upper horizontal frames 15, 15, and the upper and lower ends of the opposing front and rear clamp columns 14, 14 are connected by stay bolts 16, 16, and the left and right gaps between each of the front and rear clamp columns 14, 14 are The air spring cover frames 17, 17 are fixed inside, and the air spring mounting plate 18 is arranged on the inner surface of each air spring cover frame 17, 17, and the left and right guide shafts 19 of the air spring mounting plate 18 are fixed.
Guide metal 20 on the inside of the air spring cover frame 17
An adjustment nut 21 with a compression spring is screwed into the outer end of the left and right guide shaft 19 that protrudes from the air spring cover frame 17, and is connected to the inner surface of the air spring cover frame 17 and the air spring mounting plate 18. A sand mold clamping device 2 in which an air spring 22 is mounted, a clamp plate 24 having a liner 23 attached on the outer surface in parallel to the top and bottom is fixed to each air spring mounting plate 18, and front and rear clamp plates 24, 24 are opposed above a pouring table 9.
5.

Effect The right end of the pouring table 9 is connected to the molding machine, and the vertically split sand molds formed by the molding machine are received on the fixed liner 3a in a continuous joint, and one sand mold is placed on the top surface of the pouring table 9. When the movable liner 3a is extruded to the upper surface of one end of the fixed liner 3a, the eccentric shaft 4 rotates due to the operation of the second extrusion cylinder 7b, and the movable liner rises slightly above the fixed liner 3a via the movable frame 5 and the leg plate 6. 3b receives most of the load of the vertically divided sand mold row on the upper surface of the fixed liner 3a, and in this state, one sand mold extruded joins to the back side of the sand mold row and presses the sand mold row, and together with the movable liner 3b After the sand mold row has moved by one sand mold, the second extrusion cylinder 7b is operated in reverse and the movable liner 3b is lowered to a lower position than the fixed liner 3a, and the first extrusion cylinder 7a is operated and the movable liner 3b is returned to its original position. This will bring it back. Vertical sand mold row is sand mold clamping device 2
5, the air spring cover frame 17,
High pressure air is supplied to the air springs 22, 22 from a high pressure hose (not shown) connected to the air springs 22, 22 in the air springs 17,
Air is supplied into the air springs 22, 22 which are expanded.
With this, the front and rear clamp plates 24, 24 advance oppositely through the air spring mounting plates 18, 18, and are clamped to both sides of the vertically split sand mold row. In this state, pour molten metal into the mold hole provided on the front and rear joint surfaces of the vertically divided sand mold, and when the next vertically divided sand mold row moves forward, the air spring 2
The air pressure in the sand molds 2 and 22 is reduced, and the front and rear clamp plates 24, 24 are moved forward by the width of one sand mold while lightly touching both sides of the vertically split sand mold row, and the front and rear clamp plates 24 are moved forward by the width of one sand mold at the same time as the sand mold row is stopped. , 24 are again attached to both sides of the sand mold row, and the molten metal is poured into the next mold cavity. Therefore, since both sides of the vertically split sand mold row are clamped by the front and rear clamp plates 24, 24 during and after pouring on the top surface of the pouring table 9, expansion of the sand mold and melt leakage can be prevented. Conversely, the volume of casting can be increased by reducing the thickness of the mold hole in a sand mold. The front and rear clamp plates 24, 24 are attached to a frame consisting of the front and rear clamp columns 14, 14, the upper and lower horizontal frames 15, 12, etc., and the frame is mounted on the pouring table 9 via the front and rear hanging rods 11. Therefore, the front and rear clamp supports 14, 14 can freely move back and forth with respect to the pouring table 9, and when the front and rear clamp plates 24, 24 come into contact with the sand mold row, they can easily fit together, and damage to the sand mold can be prevented, etc. This provides the remarkable effects described above.

[Brief explanation of drawings]

FIG. 1 is a front view of a pouring table equipped with a sand mold clamping mechanism according to the present invention, and FIG. 2 is an enlarged partially vertical side view thereof. 1 front and rear supports, 2 frame bodies, 3 fixed liners, 3b movable liners, 9 pouring table, 11 front and rear hanging rods,
12 front and rear lower horizontal frames, 14 front and rear clamp columns, 15
Front and rear upper horizontal frames, 17 air spring cover frame, 18 air spring mounting plate, 22 air spring, 24 front and rear clamp plates.

Claims (1)

[Scope of utility model registration request] A large number of fixed liners are installed in parallel in the longitudinal direction of the upper frame of the table, whose longitudinal direction is the left and right direction, and a movable liner is provided that moves up and down and reciprocates in the longitudinal direction in the gaps between the fixed liners. In the pouring table, the upper ends of the hanging rods are pivotally attached to a number of arm rods protruding from both long outer surfaces of the upper frame of the table, and the lower horizontal frame is attached to the lower end of each hanging rod on both outer surfaces of the table. A plurality of clamp supports are mounted oppositely on the lower horizontal frame and project upwardly from both outer surfaces of the table.
Above both outer surfaces of the table, the upper ends of the clamp columns are connected with the upper horizontal frame, and the upper and lower ends of the clamp columns facing each other across the table are connected with the upper and lower shaft rods, and the gaps between the left and right of each clamp column are connected. Secure the air spring cover frame opposite the top of the table, fix the air spring mounting plate to the end, and let the left and right guide shafts of the air spring mounting plate pivot on the air spring cover frame.Insert the air spring into the air spring cover frame. A sand mold clamping device for a pouring table, in which a plurality of sets of clamp plates are mounted and fixed to each of the air spring mounting plates, and a plurality of sets of clamp plates are opposed to each other above the pouring table.