JP2001286985A - Molding machine for flaskless mold - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a molding machine for flaskless mold in which the mating surfaces of the molds are not collapsed when the upper and the lower molds are piles up. SOLUTION: In at least one side of the mating surface of the flask in one pair of the upper and the lower flask 1, 2, elastic mechanisms 5, 25 are attaches so as to be possible to abut on the mating surface in the opposite side flask or the mating position, and further, an impact force developing means is successively connected with the rear part of this elastic mechanism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a frameless mold making machine.

[0002]

2. Description of the Related Art Conventionally, as a frameless type molding machine, a pair of upper and lower frames are combined on upper and lower surfaces of a match plate to define a molding space, and molding sand is blown into these molding spaces. In some cases, a mold is formed, the mold is released, the upper and lower frames are joined to define a product cavity, and then the upper and lower molds are extracted from the upper and lower frames. However, in the conventional frameless mold molding machine configured as described above, since the substantial area of the mating surface of the upper and lower molds is relatively small, the upper and lower frames are combined to lower the upper mold. When stacked on a mold, there is a problem that the mating surface of the mold may be broken.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a frameless mold molding machine in which when mating an upper mold and a lower mold, the mating surfaces of the molds do not collapse. Is to do.

[0004]

Means for Solving the Problems To achieve the above object, a frameless mold molding machine according to the present invention defines a molding space by matching a pair of upper and lower frames on both upper and lower surfaces of a match plate. A molding sand is blown into these molding spaces to form a mold, and after releasing the mold, the upper and lower frames are combined to define a product cavity, and then the upper and lower molds are formed from within the upper and lower frames. In the frameless mold molding machine that is to be extracted, an elastic mechanism capable of contacting a mating surface or a mating member of a mating frame is mounted on a mating surface of at least one of the pair of upper and lower frames. It is characterized by the following.

[0005] With the above structure, when the upper mold and the lower frame are put together and the upper mold is stacked on the lower mold, the elastic mechanism works to separate the other frame, and the impact when the layers are overlapped is reduced. Collapse of the mating surface of the mold can be prevented.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a frameless mold making machine to which the present invention is applied will be described in detail with reference to the drawings. The pair of upper and lower frames 1 and 2 can be aligned and separated from both upper and lower surfaces of a match plate (not shown) attached to a frameless type molding machine (not shown). The upper frame 1 is fixedly mounted with a vibrator 3 as impact force generating means extending vertically. The vibrator 3 is a conventional one in which a piston 4 as a vibrating member moves up and down by supply of compressed air. Further, the tip of the piston 4 is in contact with the upper end of the elastic mechanism 5 fixed to the upper frame 2. The elastic mechanism 5 includes a cylindrical main body 6 extending in the vertical direction, and a cut-off rod 7 penetrating the main body 6 so as to be vertically movable.
And a cover member 8 screwed to the upper part of the main body 6, and a compression coil spring 9 disposed between the cover member 8 and the cut-off rod 7.
It consists of The elastic mechanism 5 is connected to the vibrator 3 by annular connecting members 10 and 11.

An elastic mechanism 25 having the same function as the above-described elastic mechanism 5 is mounted on the lower frame 2.
The elastic mechanism 25 includes a cylindrical main body 2 extending in a vertical direction.
6 and a cut-off rod 2 penetrated in the main body 26 so as to be movable up and down.
7, a cover member 28 screwed to a lower portion of the main body 26, and a compression coil spring 30 disposed between the cover member 28 and the cut-off rod 27. And the elastic mechanism 25
An annular seal retainer 12 mounted on the lower frame 2 is disposed on the upper surface of the lower frame 2.

[0008] In the above structure, when the compressed air is supplied to the vibrator 3 when the upper mold is released from the mold, the piston 4 of the vibrator 3 moves up and down. The body 7 moves up and down while being urged by the compression coil spring 9. As a result, the broken rod 7 continuously collides with the match plate (not shown) to apply vibration to the match plate. Since the vibrator 3 is fixedly mounted on the upper frame 1, the piston 4 of the vibrator 3
Acts on the match plate without being reduced, and the force of the piston 4 is urged by the compression coil spring 9 of the elastic mechanism 5, so that the vibrator 3 can be relatively small.

After releasing the upper and lower molds, the upper and lower frames 1
When the two are joined (see the figure), the elastic mechanisms 5 and 25 come into contact with each other and work to separate the mating frames, so that the mating surfaces of the molds can be prevented from collapsing.

In the above embodiment, the elastic mechanisms 5.2
5 is provided on both the upper and lower frames 1 and 2, but the upper and lower frames 1
It goes without saying that the same function and effect can be obtained even if it is provided in one of the two. In the above embodiment, the vibrator is used as the impact force generating means.
A conventional air hammer in which an impact force is generated intermittently by compressed air may be used. Further, in the above embodiment, one of the elastic mechanisms 5 and 25 abuts as an elastic mechanism and the other abuts as a mating member.
And the elastic mechanism 25 may abut against the mating surface of the upper frame 1. In addition, the elastic mechanisms 5 and 25 may be elastic members such as rubber materials.

[0011]

As is apparent from the above description, the present invention defines a molding space by combining a pair of upper and lower frames on the upper and lower surfaces of the match plate, and casts molding sand into these molding spaces. A frameless mold mold in which the mold is blown to form a mold, the mold is released, and the upper and lower frames are joined to define a product cavity, and then the upper and lower molds are extracted from the upper and lower frames. In the machine, since an elastic mechanism capable of contacting the mating surface or mating member of the mating frame is mounted on the mating surface of at least one of the pair of upper and lower frames, the upper and lower molds overlapped. Excellent practical effects, such as preventing the mating surface of the mold from sometimes collapsing.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

[Explanation of symbols]

 5, 25 elastic mechanism

Claims (2)

[Claims] 1. A pair of upper and lower surfaces on both upper and lower surfaces of a match plate.
The lower frame is combined to define a molding space, molding sand is blown into these molding spaces to mold a mold, and after releasing the mold, the upper and lower frames are joined to define a product cavity, and then the product cavity is defined. In a frameless mold molding machine in which upper and lower molds are extracted from the upper and lower frames, a mating surface or mating of a mating frame of at least one of the pair of upper and lower frames is performed. A frameless mold making machine characterized by mounting an elastic mechanism capable of contacting a member. 2. The frameless mold molding machine according to claim 1, wherein an impact force generating means is connected to a rear portion of said elastic mechanism.