JPH0820012A - Lower mold for molding ceramic molding basis - Google Patents

Abstract

PURPOSE:To provide a lower mold for molding a ceramic molding basis which lasts for a long time without defective ascending/descending of a piece mold and without damage in the piece mold and mold holes. CONSTITUTION:In a lower mold for molding a ceramic molding basis, a piece mold 3 is set in each mold hole 2 of a multicavity formwork 1 having the mold holes 2 and the piece mold 3 is supported by a mold receiving stage 4 to be lifted by operation of a lifting board 10. On the mold receiving stage 4, a through hole 6 whose bottom end is made to be a diameter expanding part 5 for receiving a spring is provided. In the through hole 6, a sleeve 11 whose bottom end has a flange 12 is idly inserted by arranging a spring 13 in between the upper face of the diameter expanding part 5 and the flange 12. An attaching bolt 14 is inserted from the bottom end of the sleeve 11 and its upper end is screwed to the piece mold 3 so as to attach the piece mold 3 to the mold receiving stage 4 under a fixed spring pressure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lower mold for molding a ceramic molding material for molding a tile or other ceramic molding material.

[0002]

2. Description of the Related Art Conventionally, a lower mold for molding a ceramic molding base used for molding a ceramic molding base such as a mosaic tile base is a multi-cavity mold in which mold holes are arranged in a lattice frame shape. A piece mold is fitted in each mold hole and each piece mold is supported by a mold cradle that is moved up and down by the operation of an elevator board. In recent years, in order to increase the number of molded products obtained by one press molding. In addition, there is a tendency that the partition wall of the mold is narrowed or the entire mold is enlarged. However, the partition wall of the formwork is narrowed,
When the entire mold is enlarged, the mold flexes due to the molding material and the weight of the mold at the time of molding, and the mold is caught between the mold and the mold hole at the time of mold release. There was a problem that accidents frequently occurred, such as damage to the mold cavity and piece mold.

[0003]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems and provides a lower mold for molding a ceramic molding base that can be durable for a long period of time without any failure in raising or lowering the mold or damage to the mold or the mold cavity. To provide.

[0004]

A lower mold for molding a ceramic molding base according to the present invention, which has solved the above-mentioned problems, comprises:
For molding of a ceramic molding base in which a piece mold is fitted in each mold hole of a multi-cavity mold having a mold hole, and each piece mold is supported by a mold cradle that is raised and lowered by the operation of an elevator. In the lower mold, a through hole having a lower end as an enlarged diameter portion for spring reception is provided in the vertical direction in the die receiving base, and a sleeve having a flange portion at the lower end is provided in the through hole and an upper surface of the enlarged diameter portion and a flange portion. A spring is interposed between the sleeve and the sleeve, and the mounting bolt is inserted from the lower end of this sleeve, and the upper end of the sleeve is screwed onto the piece die, whereby the piece die is attached to the die pedestal under a constant spring pressure. It is characterized by that.

[0005]

According to such a lower mold for molding a ceramic molded body, the piece mold which is inserted into the mold hole of the mold frame so as to be movable up and down is lifted by the operation of the elevator plate and molded in the mold hole. Even when the mold frame is bent when releasing the ceramic molding base,
The sleeve, which is loosely inserted into the through hole of the die pedestal with a spring interposed between the upper surface of the expanded diameter portion and the flange portion, is movably attached to the piece die by a mounting bolt inserted in the sleeve. Therefore, when the piece mold comes into contact with the die hole, the piece die tilts or slides with respect to the die pedestal against the spring pressure of the spring, which may cause the piece die to move up or down or damage the die piece or die hole. Never.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the illustrated embodiments. Reference numeral 1 denotes a mold frame in which a large number of mold holes 2 are provided in a grid pattern, and the mold frame 1 holds a grid-shaped inner frame by an outer frame (not shown). Reference numeral 3 denotes a piece mold fitted in each mold hole 2 of the mold frame 1. The molding material does not drop between the mold piece 3 and the mold hole 2, but is small enough to smoothly move up and down. A gap is provided.

Reference numeral 4 denotes a die receiving base for receiving the piece die 3, and the die receiving base 4 is provided with a through hole 6 whose lower end is an enlarged diameter portion 5 for receiving a spring. Reference numeral 7 denotes a lower piece plate to which the die receiving base 4 is attached, and the die receiving base 4 is fixed by a bolt 9 screwed into a bottom portion from a stepped hole 8 of the lower piece plate 7. Reference numeral 10 denotes a lift plate which is lifted and lowered by a lift mechanism (not shown). The lift plate 10 holds a lower piece plate 7 and moves each piece mold 3 relative to the form frame 1 via a mold receiving base 4. It is for releasing the ceramic molded product in the mold.

Reference numeral 11 designates the upper end of the through hole 6 of the die stand 4 and the upper end of the die die 3
A sleeve that is loosely inserted in contact with the lower surface of
The lower end of this sleeve 11 is formed on the flange portion 12,
The sleeve 11 has a plurality of springs 13 such as disc springs.
Is fitted to the flange portion 12 while being supported. Reference numeral 14 is a mounting bolt that is loosely inserted from the lower end of the sleeve 11 and has a screw portion 14a at the tip screwed to the bottom of the piece mold 3.
The spring 13 supported by the flange portion 12 by the mounting bolt 14 is sandwiched between the spring 13 and the upper surface of the expanded diameter portion 5, and the piece die 3 is movable with respect to the die receiving base 4 under a constant spring pressure by the spring 13. Installed on. In addition, mounting bolt 1
4 and the sleeve 11, and between the sleeve 11 and the through hole 6, a small gap is provided, and the piece mold 3 and the mold cradle 4 are movable.

With such a structure, the lifting plate 10 is lowered by the operation of a lifting mechanism (not shown) to lower the piece mold 3 fitted in the mold hole 2 of the mold 1 to a predetermined position. To form a cavity in the mold cavity 2 and supply the molding material to the cavity and pressurize it with the upper die 20 to compression-mold the molding material. After the molding, an elevator mechanism (not shown) is operated to raise the elevator plate 10. Thus, the piece mold 3 fitted in the mold hole 2 is lifted to release the ceramic molding material formed in the cavity from the lower mold for molding the ceramic molding material by the conventional dry method. It is the same.

In such a process, when the raising / lowering board 10 is operated to move the piece mold 3 up and down through the mold cradle 4, the mold 1 is moved by the weight of the molding material filled in the cavity and the weight of the mold itself. When it is bent, the peripheral surface of the piece mold 3 fitted in each mold hole 2 of the mold 1 comes into contact with the inner surface of the mold hole 2. A sleeve 11 having a flange portion 12 at the lower end was inserted into a through hole 6 having a lower end portion as a spring receiving enlarged diameter portion 5 with a spring 13 interposed between the flange portion 12 and the upper surface of the enlarged diameter portion 5. In addition, since the piece mold 3 is movably attached to the die cradle 4 by a mounting bolt 14 which is inserted from the lower end of the sleeve 11 and whose upper end is screwed to the piece die 3, the piece die 3 is movable. Even if the peripheral surface of the die 3 comes into contact with the inner surface of the die hole 2, the contact pressure causes the piece die 3 to exert a spring pressure on the spring 13. Against this, it tilts or slides with respect to the die cradle 4 and escapes to the side with a smaller resistance. Therefore, the piece die 3 is caught in the die hole 2 to cause a lifting failure, or the die die 3 and the die hole. There is no risk of an accident in which one or both of the two are worn and damaged due to forcible lifting.

[0011]

As is apparent from the above description, according to the present invention, since the mold piece is movably attached to the mold holder under a constant spring pressure, the bending of the mold frame causes the mold piece and the mold holder to be bent. Since the piece die is prevented from being caught by the slide or tilting and caught in the die hole, the die die can be durable for a long time without being lifted or lowered and the die hole or piece die is not damaged by the bite. Moreover, since it is not necessary to interrupt the molding work or to perform the work of releasing the bite due to the biting of the piece mold, there are various advantages such as a reduction in the production efficiency and a reduction in the running cost and the cost reduction. Is to have. Therefore, the present invention is extremely beneficial to the industry as a lower mold for molding a ceramic molding material that solves the conventional problems.

[Brief description of drawings]

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

FIG. 2 is a partially cutaway side view showing a molded state of the present invention.

[Explanation of symbols]

 1 Form Frame 2 Type Hole 3 Piece Type 4 Type Cradle 5 Expanding Part 6 Through Hole 11 Sleeve 12 Flange Part 13 Spring 14 Mounting Bolt

Claims (1)

[Claims] 1. A multi-cavity mold having a mold cavity (2).
A ceramic with a piece die (3) fitted in each die hole (2) of (1) and supported by a die pedestal (4) that is moved up and down by the operation of an elevator (10). In the lower mold for molding of the molding base, the mold cradle
A through hole (6) with a lower end as an expanded diameter part (5) for spring reception is provided in (4) in the vertical direction, and a sleeve (11) with a flange part (12) at the lower end is provided in each through hole (6). Is loosely inserted with a spring (13) interposed between the flange portion (12) and the upper surface of the expanded diameter portion (5), and a mounting bolt (14) is inserted from the lower end of the sleeve (11) to A lower mold for molding a ceramic molding base, characterized in that the upper end of the upper mold is screwed onto the mold (3) so that the mold (3) is attached to the mold holder (4) under a constant spring pressure.