JPH0315523B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a cement tile molding machine that molds a cement tile by pressurizing mortar between an upper mold, a lower mold, a receiving plate, and a side frame.

(Background technology) To form a cement tile, a predetermined amount of mortar made by mixing cement, sand, and water in a predetermined ratio is placed on a lower mold attached to a press, and the mortar is surrounded by a side frame. The upper mold attached to the press machine is lowered forcefully to stretch the mortar horizontally and apply pressure.
A commonly used method is to fill a mold made up of various molds with mortar and form the mold.

However, when press-molding a cement tile 1 called a yakubutsu tile that has a hanging part 1a as illustrated in FIG. 1, the main part 1b, which is thin in the vertical direction, is compressed with a large compression ratio. Therefore, the mortar is compacted and becomes strong, but the hanging part 1a is
It is difficult for the raw material to fill the corresponding part of the mold, and the compression rate is also low, so it becomes a weak part.
After press molding, it tends to break when taken out of the mold.

In particular, so-called dry mortar with a low moisture content has poor fluidity, so even if you try to mold a functional tile with a hanging part, the mortar will not enter the hollow part of the mold that will be the hanging part. Moreover, since sufficient pressure could not be applied, it was inevitable that this part would become even more fragile.

In order to strongly pressurize the hanging part 1a, conventional methods include providing a laterally movable part in a part of the lower mold to press the hanging part 1a from the front (left side in Figure 1) as well. was also considered, but this method has the disadvantage of complicating the structure of the press machine and die.

(Object of the present invention) This invention is an invention aimed at obtaining a cement tile molding machine that can firmly mold even the hanging portion 1a.

(Structure of the present invention) The cement tile forming machine of the present invention rapidly feeds mortar using compressed air into a cavity in a mold consisting of an upper mold, a lower mold, a receiving plate placed thereon, and a side frame. A mortar feeder is installed to feed the mortar, a vibrator is installed to vibrate the upper mold during molding, and a receiving plate pusher is installed to take out the molded cement tile having a hanging part without breaking the hanging part. It is configured with the following.

(Embodiment of the present invention) Figure 2 and below show an embodiment of the molding machine of the present invention.
FIG. 2 is a front view, FIG. 3 is a left side view, and FIG. 4 is a front view schematically showing the mortar feeder and mold.

The molding machine is placed above a machine stand 3 fixed to the floor 2.
The pedestal 5 is fixed by the four pillars 4, 4, and the pedestal 3
The lower mold 6 is mounted on top of the lower mold 6, and the receiving plate 7 that forms the inner surface of the accessory tile is placed on top of the lower mold 6. It allows it to be pushed upwards.

A hydraulic cylinder 9 is attached to the pedestal 5, and the hydraulic cylinder 9 is used to push a movable table 11 fixed to the lower ends of four vertical shafts 10, 10 that slidably pass through the pedestal. The moving table 11 has an elastic joint 1
An upper die mounting plate 13 is attached via 2, and an upper die 14 is attached to the lower surface of this attachment plate 13. Further, the movable table 11 supports a vibrator 15 that vibrates the upper mold 14.

A side frame 16 is provided around the lower die 6, and a through hole 17 is bored in the side frame 16. A mortar feeder 18 press-fits mortar through the through hole 17 into the cavity surrounded by the upper die 14, the receiving plate 7, and the side frame 16.

As shown in FIG. 4, the mortar feeder 18 is
At the top of the airtight container 19, an opening 20 opens the container 19.
A hopper 21 that communicates with the inside is connected, and a conical valve 23 that is raised and lowered by an air cylinder 22 is provided to open and close the opening 20. 2
Reference numeral 4 denotes an elastic annular packing for airtightly closing the valve 23. Compressed air is fed into the airtight container 19 through an inlet pipe 25.

An outlet pipe 26 for delivering the mortar is attached to the bottom side of the airtight container 19, and a stirring shaft 28 having a stirring arm 27 is provided at the bottom concentrically therewith. Depending on the machine,
It is designed to rotate and reciprocate in the axial direction from outside the device. The outlet pipe 26 is connected to the side frame 16 by a flange 29 and communicates with the inside of the mold by a through hole 17. Instead of directly connecting the outlet pipe 26 to the mold as in the illustrated example, it may be connected via a short pressure-resistant flexible tube.

The mold consists of an upper mold 14, a lower mold 6, a side frame 16, and a receiving plate 7. In the illustrated mold, the receiving plate 7 is formed to be large and vertically long in order to mold a cement tile 1 having a hanging portion 1a.

The operation of the cement tile forming machine consisting of the above-mentioned parts is as follows.

(1) Preparation Open the valve 23 and charge mortar from the hopper 21 into the airtight container 19, then close the valve 23.

The amount of mortar is such that it fills the cavity in the mold and the outlet pipe up to the vicinity of its entrance, and this mortar is stirred by a stirring shaft 28.

The upper mold 14 is lowered by the hydraulic cylinder 9 and fitted into the side frame 16, and together with the receiving plate 7, a tile-shaped cavity is formed in the mold.

(2) Mortar supply Compressed air of 6 to 8 atmospheres is rapidly blown into the airtight container 19 from the inlet pipe 25.

As a result, the mortar at the bottom of the container 19 is pushed through the outlet pipe 26 into the mold almost instantaneously, and the air inside the mold is released into the upper mold, lower mold, side frame, etc. It is discharged through the slit in the seam.

The mortar that is rapidly pushed into the mold by high-pressure compressed air spreads to every corner of the cavity within the mold, and is sufficiently pushed into the vertically long cavities that form the hanging parts. It will be done. Moreover, since the mortar rapidly enters the mold, it hits the inner wall of the mold and is densely filled.

(3) Pressure After filling the mortar described above, the upper mold 14 is strongly pressed by the hydraulic cylinder 9, and an impact is applied to the upper mold 14 by the vibrator 15, thereby completing the press molding.

(4) Removal The upper mold 14 is raised by the hydraulic cylinder 9, the receiving plate 7 on which the molded cement tiles are placed is raised by the air cylinder 8, and the tiles are transferred together with the receiving plate 7 to the drying process.

The mortar remaining between the outlet pipe 26 and the through hole 17 in the mold side frame is used during the next subsequent molding.

As can be seen from the above examples, the cement tile forming machine of the present invention rapidly pushes mortar into a mold by blowing it away with compressed air, and fills the mold by slamming the mortar against the inner wall of the mold. Therefore, as described below, it is possible to densely fill a large amount of mortar into the hanging parts, which were weak due to insufficient mortar filling and pressurization. By applying pressure with an upper mold while shaking, a dense and strong cement tile can be formed.

(Effects of the present invention) (1) Mortar is rapidly pushed into the mold by compressed air, reaching every corner of the mold, and is filled by hitting the inner wall of the mold, making it dense. , the strength of the tiles increases.

(2) The strength of the hanging parts, which used to be the weak point of roof tiles, is increased, reducing the chance of damage. Therefore, in order to strengthen the hanging portion, there is no need for troublesome processing such as applying pressure to this portion from the side.

(3) The above effects can be further enhanced by the vibrator 15.

(4) Strong molding can be achieved by rapid filling with compressed air and vibration, so there is no need to increase the pressure applied by the mold, and it becomes necessary to significantly increase the capacity of the molding machine.

(5) Dry mortar with reduced moisture has poor fluidity, and conventionally it was difficult to enter the mold cavity that becomes the hanging part during pressure molding, making it difficult to mold the hanging part, but the present invention According to this method, good filling and molding can be performed.

[Brief explanation of drawings]

Fig. 1 is a perspective view illustrating a utility tile, Fig. 2 and the following show embodiments of the present invention, Fig. 2 is a front view of the molding machine, Fig. 3 is a side view thereof, and Fig. 4 is a mold. A front view schematically showing the mortar feeder and the mortar feeder, FIG.
-A sectional view. 1: Cement tile, 1a: Hanging part, 1b: Main part, 2: Floor, 3: Machine stand, 4: Support column, 5: Frame,
6: lower mold, 7: receiving plate, 8: air cylinder, 9: hydraulic cylinder, 10: vertical axis, 11: moving table, 12:
Elastic joint, 13: Upper mold mounting plate, 14: Upper mold, 1
5: Vibrator, 16: Side frame, 17: Through hole, 18: Mortar feeder, 19: Airtight container, 20: Opening, 2
1: Hopper, 22: Air cylinder, 23: Valve, 2
4: Packing, 25: Inlet pipe, 26: Outlet pipe,
27: Stirring arm, 28: Stirring shaft, 29: Flange.

Claims (1)

[Claims] 1 Support the pedestal 5 by the support 4 on the machine 3,
Hydraulic cylinder 9 for raising and lowering the movable table 11 on the pedestal 5
, an upper die mounting plate 13 with an upper die 14 attached to the lower surface thereof is attached to the lower surface of the movable table 11 via an elastic joint 12, and a vibrator 15 for vibrating the upper die 14 is attached to the movable table 11, A side frame 16 is provided on the upper surface of the machine stand 3 to surround the sides of the lower mold 6 with the receiving plate 7 stacked thereon, the upper mold 14 and the receiving plate 7 with a small gap in between, and the receiving plate 7 is placed inside the machine stand 3. An air cylinder 8 is provided to push up the upper mold 1.
4. A mortar feeder 18 is provided in which the side frame 16 is provided with a through hole 17 that communicates with the cavity surrounded by the side frame 16, the receiving plate 7, etc., and the mortar placed in the airtight container 19 is rapidly pushed out using compressed air. A cement tile forming machine connected to the above-mentioned through hole 17.