JPH09207116A - Apparatus for demolding cement molded object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the generation of a problem from an aspect of appearance such as a dent even in a thin cement molded object by providing a frame member to the side periphery of a suction pad main body so as to be capable of moving the same along the side surface thereof to certainly suck and demold the cement molded object. SOLUTION: A demolding apparatus 1 is constituted of a suction pad main body 11, a frame member 12 and a pneumatic cylinder 13 and the surface of the suction pad main body 11 is formed into a curved surface having the outer surface shape corresponding to the surface shape of a cement molded product to be sucked and demolded and a large number of suction holes 111 are provided to the surface of the suction pad main body 11 and allowed to communicate with a vacuum suction device by a suction passage 112. The frame member 12 is provided to the periphery on the side of the molded product of the suction pad main body 11 and can be moved up and down along the side surface of the suction pad main body 11 by the forcible driving of the pneumatic cylinder 13 attached to the suction pad main body 11. By this constitution, since the end surface of the cement molded product can be covered with the frame member 12, sufficient suction force is obtained even by small suction force and the cement molded product can be certainly sucked and demolded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cement molded product demolding device for adsorbing and demolding a press-molded cement molded product.

[0002]

2. Description of the Related Art A cured molded article obtained by molding and curing a composition comprising a hydraulic inorganic substance such as cement, mortar and gypsum and water has been suitably used as various structural materials since ancient times. . That is, for example, clay roof tiles such as Ibushi roof tiles are well known as roof tiles and have been most often used.

Recently, however, the amount of high-quality clay has decreased, and it has become difficult to mass-produce high-performance clay. Therefore, in recent years, roof tiles obtained by curing hydraulic inorganic moldings such as thick slate and cement roof tiles have started to be provided instead.

As a method for molding such a hydraulic inorganic molded body, for example, as described in Japanese Patent Laid-Open No. 1-215506, during press molding, the water compressed from the material is squeezed and demolded. A method of demolding the cement compact by further suctioning and discharging, then opening the mold while adsorbing the cement compact on the mold surface, and then ejecting compressed air from the water squeezing and demolding holes. Proposed.

However, in this method, in order to improve the productivity, excess water is used with respect to the amount required for hardening the cement molded product, so that the dehydration step requires time and, at the time of dehydration, There is a problem in that the fibers and the powder material are likely to cause clogging, which may interfere with adsorption and ejection of compressed air in the demolding process of the cement molded product.

Therefore, for example, as described in Japanese Patent Application Laid-Open No. 2-8007, a product-shaped plate portion obtained by press molding a raw plate manufactured by a papermaking method and an extrusion method is adsorbed by an adsorption transfer machine and placed on a loading pallet. A loading method and the like have been proposed.

[0007]

However, even in this method, the flat plate-shaped molded article can be adsorbed by the adsorption transfer machine, but in the case of the molded article having an uneven thickness and a complicated surface shape, the adsorption is performed. However, there was a problem in appearance that the back surface adsorbed by the vacuum transfer machine had a recess in the thin portion.

The present invention solves the above-mentioned problems of the prior art, and can reliably adsorb and demold a cement molded product having a complicated surface shape, such as a recess in a thin wall portion. The object of the present invention is to provide a demolding device for a cement molded product that does not cause a problem in appearance.

[0009]

SUMMARY OF THE INVENTION The present invention is a cement molded product demolding apparatus for adsorbing and demolding a cement molded product obtained by press molding, which is provided around the side of a suction cup body along its side surface. It is a demolding device for a cement molded body in which a frame is movably provided.

In the present invention, the frame provided around the side of the suction cup body is movable along the side surface of the suction cup body. The length of the movement is such that the cement compact is vacuum-adsorbed by the suction cup. In doing so, the length is set so as to be flush with the surface of the suction cup body from the thickness of the desired cement molded body of various thicknesses or more.

The mechanism for moving the frame body along the side surface of the suction cup body may be one that utilizes expansion and contraction of a spring, rubber or the like, or one that is forcibly driven by a hydraulic cylinder, a pneumatic cylinder or the like. . On the contact surface of the frame body with the mold surface of the press mold, in order to maintain a good vacuum state, a material such as rubber or sponge that can be packed may be appropriately disposed.

In the present invention, examples of the material forming the cement molded product include cement, aggregate, reinforcing fiber,
Examples include water-soluble polymers and water that is close to the stoichiometric amount. In the present invention, the cement molded product that is the object of vacuum suction by the suction cup is then cured and cured for a certain period of time under a predetermined condition, and then a desired coating is applied as necessary to obtain a product.

The suction cup body used in the present invention includes:
A large number of suction holes are formed so as to open on the surface. If the diameter of the suction hole is less than 2 mm, the suction hole is likely to be clogged with the adhered matter of the cement molded body, and if it exceeds 10 mm,
Since not only a further suction effect cannot be expected, but also a part of the cement molded product is sucked to form a recess, the diameter is preferably 2 to 10 mm, more preferably 3 to 7 mm.

It is not necessary to provide the suction holes at equal intervals, and if the distance between adjacent suction holes is less than 20 mm,
No further suction effect is observed, and if it exceeds 100 mm, the degree of vacuum capable of adsorbing the cement molded product cannot be obtained and adsorption failure tends to occur, so that it is preferably 20 to 100 mm, and 30 to 60 mm. Is more preferable.

[0015]

The demolding device for a cement molded product according to the present invention has a frame body slidably provided along the side surface of the side surface of the sucker main body so that the sucker main body is provided on the surface of the cement molded product. When sucking from the suction hole of the suction cup body in the abutting state, the end surface of the cement molded body can be covered by the frame body provided around the suction cup body, so that the cement of various product thicknesses with complicated shapes can be covered. Even for a molded body, a sufficient suction force can be obtained with a correspondingly small suction force, and the mold can be surely sucked and demolded. Further, even a cement molded product having a thin product thickness does not cause a problem in appearance such as a dent.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional view showing an example of a demolding device for a cement molded product according to the present invention. In FIG. 1, reference numeral 1 denotes a demolding device for cement cement (hereinafter referred to as demolding device), which includes a suction cup body 11, a frame 12, and a pneumatic cylinder 13.

The surface of the suction cup body 11 is a curved surface having an outer surface shape corresponding to the surface shape of the cement molded product to be sucked and demolded, and a large number of suction holes 111 are provided in the surface. And the suction path 112
It communicates with a vacuum suction device (not shown). Demolding device 1
Is provided with a frame body 12 around the four sides of the suction cup body 11,
The frame body 12 is configured to be movable in the vertical direction along the side surface of the suction cup body 11 by forcibly driving the pneumatic cylinder 13 attached to the suction cup body 11.

Next, one usage mode of the demolding apparatus 1 shown in FIG. 1 will be described with reference to FIGS. 2 (a) to 2 (f). FIG.
As shown in (a), the lower mold 2 in the open mold state after press molding
A cement molded product 4 press-molded is placed on the surface 1. First, the demolding device 1 is horizontally moved above the lower mold 21.

Next, as shown in FIG. 2B, when the demolding device 1 is lowered toward the lower mold 21, the tip surface of the mold body 12 contacts the mold surface of the lower mold 21. . At this time, the frame 12 is forcedly driven by the cylinder 13 to move the frame 12 to the suction cup body 11
The demolding apparatus 1 is slightly lowered while moving relatively upward along the side surface of the mold.

Then, when the surface of the suction cup body 11 comes into contact with the surface of the cement molded product 4 placed on the lower mold 21, the lowering of the demolding device 1 is stopped, and at that time, the frame 12
Also stops the relative movement of the suction cup body 11 upwards,
The lower end surface of the frame body 12 is in contact with the surface of the lower mold 21.

In this state, suction is performed through a large number of suction holes 111 opened on the surface of the suction cup body 11 to adsorb the cement compact 4 on the surface of the suction cup body 11. At this time,
Since the end surface of the cement molded body 4 can be covered with the frame body 12 provided around the suction cup body 11, even if the cement molded body 4 has various product thicknesses of complicated shapes and a correspondingly small suction force is applied. Sufficient adsorption power can be obtained.

Next, as shown in FIG. 2C, the demolding device 1 is raised while the cement molded body 4 is adsorbed on the surface of the suction cup body 11, and the receiving plate is received as shown in FIG. 3 Move horizontally to the position above.

Then, as shown in FIG. 2E, the demolding device 1 is lowered toward the receiving plate 3, and the suction cup body 11
When the back surface of the cement molded product 4 adsorbed on the contact surface comes into contact with the surface of the receiving mold 3, the lowering of the demolding device 1 is stopped.

In this state, the frame 12 is moved relatively upward with respect to the suction cup body 11 and stopped when its lower surface is flush with the surface of the suction cup body 11. This can prevent the inner surface of the frame body 12 from sticking to the side surface of the cement molded product 4. Finally, the suction from the suction hole 111 of the suction cup body 11 is stopped,
As shown in (1), the demolding device 1 is raised so that the cement molded body 3 is placed on the receiving plate 3, and the curing step of the next step is performed.

[0025]

EFFECTS OF THE INVENTION
Since the cement molded product is configured as described above, the cement molded product can be surely adsorbed and released from the mold, and even a cement molded product having a thin product thickness does not cause an external problem such as a dent.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a demolding device for a cement molded product according to the present invention.

2A and 2B are process diagrams illustrating a usage mode of the demolding device for a cement molded body shown in FIG. 1, and FIG. 2A is a partial cross-sectional view illustrating a process of sliding the demolding device 1 above a lower mold. Figure,
(B) is a partial cross-sectional view for explaining the step of lowering the demolding device toward the lower mold to adsorb the cement compact on the surface of the suction cup body, and (c) adsorbs the cement compact on the surface of the suction cup body. Partial cross-sectional view for explaining the step of raising the demolding device while keeping it, (d) is a partial cross-sectional view for explaining the step of sliding the demolding device to the position on the receiving plate, and (e) is the demolding Partial cross-sectional view for explaining the step of lowering the device toward the receiving plate and bringing the back surface of the cement molded product into contact with the surface of the receiving mold. It is a front view explaining the process which makes it the state which mounted the cement molded object in.

[Explanation of symbols]

 1 Demolding device 11 Sucker body 12 Frame

Claims (1)

[Claims] 1. A demolding device for a cement molded body, which adsorbs and demolds a press-molded cement molded body, wherein a frame body is provided around a side of a suction cup body so as to be movable along the side surface thereof. A demolding device for a cement molded body, which is characterized in that