Vacuum type brick forming machine

Details Vacuum type brick forming machine Vacuum type brick forming machine

1981-12-16

1983-11-29

Anderson, Philip E.

Plastic article or earthenware shaping or treating: apparatus

Including ventilating type hood or chamber encasing a...

264102, 425352, 425405R, 425406, B30B 1102, B28B 302

Patent

active

044178646

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to a machine for pressing and forming brick molded in a vacuum mold by using upper and lower pistons, especially, concerns a vacuum type brick forming machine being quickly conditioned in high vacuum state, and operable continual forming work in high vacuum state.


Background Art

Applicant of this invention filed patent application entitled "A vacuum type brick forming machine" on June 9th, 1976 to Japanese Patent Office. This invention is based on the invention described in said original application.
Now referring to FIG. 1 and FIG. 2, the pistons (2) and (3) move up and down slidably in the mold (1). The upper piston (2) with the frame which goes up and down are lowered in the direction of the arrow mark and squeeze the raw material (5) filled in the mold (1) and press it between the upper piston (2) and the lower piston (3) to form bricks in the conventional way.
In the brick forming machines widely used (not shown in the drawing), the up and down motions of the pressing hammer (H) for the mold is given by the mechanism in which the horizontal wheel engages either right or left rotating wheel to be driven by one of them and the rotation of the horizontal wheel is changed into vertical movements through the gear connection. The invention has in addition to the above mechanism the hydraulic pistons (P) which are placed on the upper half of the main body (7), and which provides hydrostatic force to the up and down moving frame (4) which incorporates the upper piston (2) in addition to the impact hydrodynamic force given by the pressing hammer (H) to the piston (2). This feature of the invention is the same as in the Japanese Patent Application No. 51-67237.
The mold (1) is placed on the truck (6), which travels by the wheels (9) forward and backward on the rails (8) which are protruding upward from the right and left sections of the lower half of the main body (7a). After the pressing and forming of the bricks, the mold (1) moves on the truck in the direction perpendicular to the sheet of paper of FIG. 1 to the position in FIG. 3, which is off the center line of the upper and lower pistons sideway by the distance D.
At this position the lower piston (3) is lifted up by the external force such as push from the draw cylinder (C) to draw the products above the mold (1). After those products were moved to other place, the mold (1) receives new raw material in a specified quantity, and returns to its original position and is subjected to the above mentioned two-stage pressing. This cycle of steps is repeated.
In order to make the inside of the mold vacuum during pressing and forming one simple vacuum room for molds was used in the Japanese Patent Application No. 51-67237, but it is not easy to limit to minimum the capacity of the vacuum room which has to accommodate various types of molds.


DISCLOSURE OF INVENTION

This invention was accomplished in conformity with recognition that the basic requirement for the vacuum room is to make its capacity as small as possible. The invention presents the sealing of the mold in the minimum volume with the upper and lower pistons (2) and (3) movable through the sealing on both sides of the mold, and it adopts stretchable soft material, which will be explained below, for sealing and employs air cylinders to operate automatically the sealing parts without constraint and with accuracy.


BRIEF DESCRIPTION OF DRAWINGS

FIG. 1 shows a front view of a vacuum type brick forming machine embodying this invention in open position, partially shown in section.
FIG. 2 shows same view of the machine as FIG. 1, but in sealed position.
FIG. 3 shows a partial side view of the machine in position for taking out a product.


______________________________________ H Pressing hammer P Oil operated piston C Cylinder for taking out D Center distance 1 Mold 2, 3 Upper and lower piston 4 Frame 5 Raw material 6 Truck 7 Upper half of main body 7a Lower half of main body 8 Rail 9 Wheel 10, 11 Upper and lower air cylinde

REFERENCES:
patent: 2513785 (1950-07-01), Browne
patent: 3712785 (1973-01-01), Hirt et al.
patent: 3784343 (1974-01-01), Iwasaki
patent: 3832107 (1974-08-01), Cox et al.

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