JPS6320621B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a vertical frameless molding machine that molds half mold surfaces on both left and right sides using model plates arranged opposite to each other on the left and right sides.

Conventionally, this type of molding machine has had the disadvantage that when the mold is removed from the mold, there is severe friction between the mold and the mold, which can damage the mold and accelerate wear of the mold. Further, the mold formed in the molding frame is moved together with the molding frame to a position where it does not interfere with both model plates during frame punching. For this reason, a device for moving the heavy molding frame was required, resulting in the problem that the entire molding machine became large.

The present invention was made in view of the above circumstances, and
To provide a vertical frameless molding machine capable of making a molded mold into a frameless state without extruding it from a molding frame at a molding position. An embodiment of the present invention will be described in detail below with reference to the drawings. Reference numeral 1 designates a rectangular base, and an upwardly facing cylinder 2 is inserted and fixed in the center of the base 1, and a piston rod 3 of the cylinder 2 has a rectangular plate shape at the upper end, and has a rectangular plate at both front and rear ends of the upper surface. A bottom wall member 5 having stepped portions 4, 4 formed thereon is fixed horizontally (see FIG. 2). Further, a gate-shaped frame 6 having a required height is installed on the base 1, and a frame structure F, which will be described later, is formed by molding sand at a position directly above the bottom wall member 5 on the ceiling of the gate-shaped frame 6. A blow head 7 for blowing air into the air is fixedly inserted therethrough, and the inside of the blow head 7 can communicate with a source of compressed air and the atmosphere through a three-way directional switching valve (not shown). The lower end of the blow head 7 includes an upper surface of the bottom wall member 5 excluding the stepped portions 4, 4;
A top wall member 8 with a lower surface identical in size and shape corresponds to the bottom wall member 5 and is fixed horizontally, with a blowhead 7 in the center of the top wall member 8.
A blow-in port 9 penetrating therein is bored. Further, as shown in FIG. 2, rectangular plate-shaped side wall members 10 having a required size are provided at both left and right end portions of the top wall member 8.
10 is vertically movably installed, and the side wall member 1
Links 13, 13 are connected to the outer surfaces of 0 and 10 via brackets 11 and 11 and joint pins 12 and 12, respectively.
One end of the link 1 is supported so as to be movable up and down.
The other ends of the brackets 14, 14 and the joint pins 15, 15 are attached to the legs of the portal frame 6.
A link 16 supported vertically and vertically via
It is rotatably connected to the other end of 16 via joint pins 17, 17, and furthermore, joint pins 17, 1
The lower end portions of piston rods 19, 19 of downward cylinders 18, 18, which are hung vertically from the ceiling of the gate-shaped frame 6 so as to be rotatable left and right, are rotatably connected to the piston rods 7, respectively. A toggle mechanism T is constructed on the outside of the side wall members 10, 10, and when the bottom wall member 5 is raised to a required height by the extension operation of the cylinder 2, and the cylinders 18, 18 are extended, the two sets of links are moved. 13, 16 and 13, 16 extend in a substantially straight line in the left-right direction, the lower ends of the side wall members 10, 10 abut against the stepped parts 4, 4, and a rigid frame structure F is formed. There is.

Reference numerals 20 and 21 denote mounting plates for mounting model plates 22 and 23 that are fitably disposed within the frame structure F, and horizontal cylinders 24 and 25 that are fixedly disposed corresponding to both sides below the blow head 7. The piston rods 26 and 27 are fixed to the tips thereof. Reference numeral 28 denotes an extrusion plate for extruding the mold M on the bottom wall member 5 during descent, and is fixed to the tip of a piston rod 30 of a horizontal cylinder 29 fixedly disposed below the cylinder 25. Reference numeral 31 denotes a mold conveying device that extends horizontally on the left side of the cylinder 2, facing the extrusion plate 28, and the upper surface level of the mold conveying device 31 is the same as that of the bottom wall member 5 when it is lowered. The conveyance section is adapted to move to the left in synchronization with the extrusion plate 28. 32 is a gate mechanism for opening and closing the upper end opening of the blow head 7.

Next, the operation of the device configured as described above will be explained. As shown in FIGS. 1 and 2, a bottom wall member 5, a top wall member 8 and two side wall members 1
Model plates 22 and 23 are fitted from both sides into the opening of the frame structure F configured with 0 and 10 to form a cavity, and a three-way directional switching valve (not shown) is installed in the cavity.
The specified amount of foundry sand is blown from the blow head 7 by operating the . After the blowing of the molding sand is completed, the three-way directional control valve is operated again to discharge the residual compressed air in the blow head 7, and the cylinders 24 and 25 are extended to move the model plates 22 and 23 closer together to blow the molding sand. Compress to desired hardness. After the molding sand is compressed, the cylinders 24 and 25 are shortened to move the model plates 22 and 23 away from each other to perform mold cutting, and then the cylinders 18 and 18 are shortened to separate the two sets of links 13, 16, 13, 16 is bent into a mountain shape to open the side wall members 10, 10 in a downwardly expanding shape, and then the bottom wall member 5 is lowered by the shortening operation of the cylinder 2 to make the compression molded mold M into a frameless state (No. (See Figures 3 and 4). Then,
The extrusion plate 28 is moved to the left by the extension operation of the cylinder 29, and the mold M on the bottom wall member 5 is pushed out onto the mold conveyance device 31. At the same time, the conveyance part of the mold conveyance device 31 is moved a required distance, and the mold M is extruded. After completion, the push-out plate 28 is returned to its original position by the shortening operation of the cylinder 29, and then the bottom wall member 5 is raised to the required height by the extension operation of the cylinder 2 again. The links 13, 16, 13, 16 are extended almost in a straight line, the side wall members 10, 10 are rotated inward, and their lower ends are brought into contact with the stepped parts 4, 4 of the bottom wall member 5, and the frame is assembled. Construct structure F. And on the other hand,
During this time, the gate mechanism 32 is opened and closed as appropriate to replenish the blowhead 7 with molding sand. By repeating the above operations, vertical frameless molds can be continuously molded.

As is clear from the above description, the present invention provides a top wall member at the lower end of the blow head 7, which is provided above the center between the pair of model plates 22 and 23, which are arranged so as to be able to reciprocate in opposite directions. 8 is fixed, and side wall members 10, 10 are vertically movably hung from both ends of the top wall member 8 in the direction intersecting with the model plates 22, 23, and on the outside of the side wall members 10, 10. Since the toggle mechanism T is equipped and the bottom wall member 5 is arranged directly below the top wall member 8 so as to be movable up and down in correspondence with the top wall member 8, it is necessary to move the entire frame structure F together with the mold. The structure is simplified. Moreover, it is possible to construct a rigid frame structure F with the top wall member 5, side wall members 10, 10, and bottom wall member 5, and the frame structure can be constructed without extruding the compression-hardened mold M with a model plate or the like. Therefore, when the mold M is removed, the mold M does not collapse or chip, and the molding frame does not wear out prematurely, and has excellent practical effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention as well as its main operating states, with Fig. 1 being a partially cutaway front view, Fig. 2 being a partially cutaway left side view of Fig. 1, and Fig. 3 being a partially cutaway left side view of Fig. 1. FIG. 4 is a partially cutaway left side view of FIG. 3; 5: Bottom wall member, 7: Blow head, 8: Top wall member, 10: Side wall member, 22, 23: Model board, T:
Toggle mechanism.

Claims (1)

[Claims] 1. A top wall member 8 is fixed to the lower end of the blow head 7 provided above the center between a pair of model plates 22 and 23 which are disposed so as to be able to reciprocate in opposite directions, and the model on the top wall member 8 is Side wall members 10, 10 having a required size are vertically movably installed at both ends in the direction intersecting the plates 22, 23, and a toggle mechanism T is provided on the outside of the side wall members 10, 10. Further, the vertical frameless molding is characterized in that a bottom wall member 5 having a required size is arranged directly below the top wall member 8 so as to be movable up and down in correspondence with the top wall member 8. Machine.