JPH10249839A - Manufacture of hydraulic inorganic molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a hydraulic inorganic molding with high productivity of press molding. SOLUTION: The method for manufacturing a hydraulic inorganic molding to mold a deformed molding by press molding a crude plate 71a manufactured by a papermaking method or extruding method comprises the steps of horizontally moving a lower die 22a of press molding, releasing and removing a press molding 72a of the die 22a by a sucking transfer unit 1 at a position out of the press, and sucking and transferring the plate 71a to the die 22a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for producing a hydraulic inorganic molded article, in which a green sheet produced by a papermaking method or an extrusion method is formed into a deformed form by press molding.

[0002]

2. Description of the Related Art Molded articles obtained by molding and hardening a composition comprising a hydraulic inorganic material such as cement, mortar, gypsum and water and hardening have been used for various purposes since ancient times. Recently, applications of not only flat and long bodies but also wavy articles such as tiles and three-dimensionally shaped articles have been increasing.

[0003] Therefore, various proposals have been made as a method for efficiently producing a hydraulic inorganic molded article having an irregular shape. For example, in Japanese Unexamined Patent Publication No. Hei 8-118335, a large number of pistons are provided in an upper die of press molding, and these pistons can move forward and backward in a cavity direction, and a tip end surface of the piston forms a part of a die surface of the upper die. After press-molding a raw plate manufactured by a papermaking method or an extrusion method, the piston is retracted from the cavity side to create a vacuum space between the upper mold and the molded body, thereby forming the molded body. A method has been proposed in which the upper die is adsorbed and then the upper die is moved to a predetermined position, and the piston is returned to the original position at that position to remove the die.

However, in this method, when the raw plate to be pressed contains fine powder, the gap between the piston and the upper die is clogged, and the piston is not sufficiently advanced and retracted, so that a desired degree of vacuum cannot be obtained and the suction is performed. Prone to failure. In addition, the production of a mold provided with a large number of pistons requires high processing accuracy, resulting in high costs, and has a problem in that the equipment is complicated due to the reciprocation of the pistons.

In Japanese Patent Application Laid-Open No. Hei 8-118339, a suction cup having a shape corresponding to the irregular shape of a molded body is prepared.
After the press molding, the mold is opened and the suction cup is brought into close contact with the surface of the molded body remaining in the lower mold, and then vacuum-adsorbed and removed from the lower mold,
A method of moving the suction cup to a predetermined position and releasing suction has been proposed.

[0006]

However, this method also requires
Although the problem of clogging of the piston does not occur, an extra suction demolding step using a suction cup is required, and there is a problem that a longer time is required for press molding as compared with the suction transfer method using the upper die and productivity is not good.

An object of the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for producing a hydraulic inorganic molded article having high press molding productivity.

[0008]

The method for producing a hydraulic inorganic molded article according to claim 1 (hereinafter referred to as "the present invention 1") comprises:
A method for producing a hydraulic inorganic molded article in which a green sheet produced by a papermaking method or an extrusion method is formed into a deformed shape by press molding, wherein a lower mold of the press molding is horizontally movable, and a position outside the press machine. Wherein the lower press-molded body is removed from the mold by the suction transfer device, and the green plate is suction-transferred to the lower die.

The method for producing a hydraulic inorganic molded article according to claim 2 (hereinafter referred to as the present invention 2) is characterized in that in the production method of the present invention 1, the lower die can be moved horizontally in both directions of the press. No, the lower press-molded product is removed by suction transfer devices provided on both sides outside the press machine, and the green plate is suction-transferred to the lower die.

[0010]

The production method of the present invention 1 is a method for producing a hydraulic inorganic molded article in which a green sheet produced by a papermaking method or an extrusion method is press-formed to form an irregularly-shaped molded article. It is a method that removes the press-molded body of the lower mold by the suction transfer device at a position outside the press machine at the position outside the press machine, and performs the suction transfer to the lower mold of the raw plate. Since the raw plate can be supplied to the lower mold simultaneously with the removal of the press-formed body, the productivity of press-forming is improved.

A manufacturing method according to a second aspect of the present invention is the same as the manufacturing method according to the first aspect, wherein the lower die can be horizontally moved in both sides of the press, and the suction transfer provided on both sides outside the press is provided. Since the lower press-molded body is removed from the mold by the apparatus and the raw plate is suction-transferred to the lower mold, the productivity of press-molding is further increased.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the manufacturing method of the present inventions 1 and 2.

Reference numeral 71a denotes a raw plate to be press-formed,
It is cut into a predetermined size according to the target product, and is conveyed by the conveyor 4a.

The raw plate used in the present invention is, for example, a plate manufactured by a papermaking method or an extrusion method from a composition obtained by adding a filler, reinforcing fiber, molding aid, water, etc. to a hydraulic inorganic material such as cement. State.

Above the conveyor 4a, there is provided a suction transfer device 1a which can move up and down and back and forth. The suction transfer device 1a includes a suction plate 11a for sucking and transferring the raw plate 71a and a suction plate 12 for sucking and transferring the press-formed molded body 72a.
a, which is connected to a pipe 14a and a pipe 15a branched from a pipe 13a connected to a vacuum pump (not shown).

The lower surface of the suction plate 11a is flat, and the lower surface of the suction plate 12a is formed in a shape corresponding to the molded body 72a so that no gap is formed when the suction plate 11a is brought into close contact with the molded body 72a. Numerous suction holes are formed in the lower surfaces of the suction plates 11a and 12a, and these suction holes communicate with the tubes 14a and 15a. When the diameter of the suction hole is small, clogging is likely to occur due to fine powder or the like from the raw plate and the press-formed body, and when the diameter is large, appearance defects such as dents are likely to occur on the surface of the press-formed body during suction. It is preferably from 0.5 to 10 mm, more preferably from 3 to 7 mm. Further, even if the distance between the suction holes is less than 20 mm, the suction effect is not further improved, and if it exceeds 100 mm, it becomes difficult to obtain a suction force. Therefore, the distance is preferably 20 to 100 mm, more preferably 30 to 60 mm.

The spacing between the suction holes may not be equal, and if the press-formed body is provided with a rib or the like for reinforcement, the rib may be deformed by 30 mm from the rib in order to prevent the rib from being deformed by suction. It is preferable not to provide a suction hole within.

The material of the suction plate 11a and the suction plate 12a is not particularly limited as long as the raw plate and the press-formed body can be lifted and transferred when the suction plate 11a and the suction plate 12a are brought into close contact with the green plate and the press-formed body and vacuum-sucked.

The press machine 2 includes an upper mold (male or female mold) 21 that moves up and down during press molding and a lower mold (female or male mold) 22a that is fixed during press molding.
Reference numerals 23a and 24a denote rails for horizontally moving the lower die 22a. The rails allow the lower die 22a to be pulled out of the press machine 2.

After press molding is completed and the mold is opened, the lower mold 22 is opened.
a is horizontally moved to the left in FIG. 1 with the press-formed body 72a fitted, and pulled out to a position facing the conveyor 4a and the receiving table 5a. Next, the suction transfer device 1a is lowered to bring the raw plate 71a and the press-formed body 72a into close contact with the suction plate 11a and the suction plate 12a, respectively. At the same time, the vacuum pump is started, and the raw plate 71a and the press-formed body 72a are sucked. The suction transfer device 1a is raised and then moved forward to move the suction plate 11a to a position above the lower mold 22a and to a position above the receiving table 5a to lower the suction transfer device 1a. Back side of raw plate 71a and press-formed body 72a
The vacuum is released at the time when the back surfaces of the base plates contact the lower mold 22a and the receiving table 5a, respectively.

The suction transfer device 1a is raised, and the raw plate 71a
Is moved horizontally on the rails 23a and 24a, returned to the press machine 2, and the raw plate 71a is subjected to press molding. During this time, the suction transfer device 1a moves backward and returns to its original position. The repetition of this step is the manufacturing method of the first invention.

In the manufacturing method according to the second aspect of the present invention, the rails 23a,
Reference numeral 24a extends to the right of the press 2 as rails 23b and 24b. A suction transfer device, a conveyor, and a cradle are also provided on the right side of the press machine 2 in the same manner as in the first embodiment. For convenience of explanation, the same devices and lower molds as those of the first embodiment of the present invention shown in FIG. 1 are used by attaching the same numbers with b instead of a, and detailed descriptions thereof will be omitted.

The same steps as those of the first embodiment are performed in the right group of apparatuses. In the second aspect of the present invention, two lower dies are prepared, and while the raw plate 71a is press-formed by one lower die 22a, the press-formed body 7 is pressed from the other lower die 22b.
2b is suction-transferred to the receiving table 5b, and the green plate 71b to be pressed next is placed on the lower mold 22b. Therefore, in the manufacturing method of the second aspect of the present invention, the productivity of press molding is further improved as compared with the manufacturing method of the first aspect of the present invention.

[0023]

The manufacturing method of the present invention 1 has the above-described configuration. According to the present invention, since the press-formed body is released from the die using a suction plate different from the press die, the shape of the suction hole in the pressing step is reduced. No clogging. Further, since the supply of the raw plate to the lower mold and the transfer of the press-formed body to the pedestal are performed simultaneously, the forming cycle is shortened and the productivity is improved.

The manufacturing method according to the second aspect of the present invention has the configuration as described above. According to the present invention, the same effects as those of the first aspect are obtained, and the productivity is further improved more than the first aspect.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of the manufacturing method of the present invention 1 or 2.

[Explanation of symbols]

 1a, 1b Suction transfer device 11a, 11b, 12a, 12b Suction plate 2 Press machine 21 Upper die 22a, 22b Lower die 23a, 23b, 24a, 24b Rail 4a, 4b Conveyor 5a, 5b Receiving stand 71a, 71b Raw plate 72a , 72b Press molded body

Claims (2)

[Claims] 1. A method for producing a hydraulic inorganic molded article, wherein a green sheet produced by a papermaking method or an extrusion method is formed into a deformed form by press molding, wherein a lower mold of the press molding is made horizontally movable. A method for producing a hydraulic inorganic molded body, comprising removing a lower press molded body by a suction transfer device at a position outside a press machine, and performing suction transfer to a lower die of a raw plate. 2. The method for producing a hydraulic inorganic molded article according to claim 1, wherein the lower mold is allowed to move horizontally in both sides of the press, and the suction transfer provided on both sides outside the press. A method for producing a hydraulic inorganic molded article, comprising removing a lower press molded article by a loading device, and performing suction transfer to a lower mold of a raw plate.