JPH02269269A - Preventing method for surface flaw generated during movement of decorative mortar plate - Google Patents

Abstract

PURPOSE:To prevent surface flaws generated during movement by forming a thin layer made of wax, Japanese wax, thermoplastic plastic or a derivative or a mixture of these materials on the back face of a decorative mortar plate to form a buffer layer. CONSTITUTION:A mixture of vinyl acetate and wax at the ratio 7:3 is heated at 180 deg.C and liquefied and injected to the depth of nearly 1mm with a shot type gun at the most recessed position 4 of a lower mold fixed to the lower board of a press machine to form a film on the surface. Mortar 4kg is mounted on the mold, an upper board fixed with an upper mold is lowered for press molding, color coating is applied on the surface for decoration, and a buffer layer 3 with the thickness 0.6mm is formed at the most protruded position 2 on the back face. Or, the ordinary-temperature hardening wax or its derivative is heated and liquefied immediately before it is laminated and packed, and it is coated on the surface of a mortar plate to form the buffer layer. Damaged flaws on the surface can be economically prevented.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a method for completely preventing damage that almost always occurs on the decorative surface when decorative mortar plates are stacked and moved.

[Conventional technology]

Products with damage and scratches that occur on the decorative surface during transportation cannot be applied at the same site, so at each construction site, paint with a color similar to the decorative surface must be applied before or after construction. Techniques have been to either correct the flaws or to sandwich paper or plastic membranes between each product to avoid damage and flaws during transport.

[Question H that the invention attempts to solve]

The method of repairing scratches using paint with a similar color tone to the decorative surface is difficult because the color of the paint cannot be perfectly matched to the color of the decorative surface, and it requires a considerable amount of time and effort for the repair work. Shi-fu/? Work at the site was delayed. The method of sandwiching a paper or plastic film between products is
It takes a lot of time and effort to insert the inserts, and at the construction site, these inserts become unnecessary dust, which requires a considerable amount of time and effort to dispose of. The present invention is based on the above r! This is to solve the problem of 1m.

[Means for solving the rR problem]

Mortar boards are usually made with mortar mixed with 1 part cement and 3 parts aggregate, or sand, but when the finished product is stacked and moved, the aggregate on the back side that comes into contact with the decorative surface is This causes damage and scratches to the surface. Of course, scratches can be prevented by turning every other product over and stacking them so that the front side and back side are in contact with each other, but this may not be possible depending on the shape of the product, and mass production may be difficult. This is not possible in the assembly line production process. The present invention has been developed so that the front and back surfaces of decorative mortar boards are laminated in contact with each other, and the back surface of the product is made of birch, which does not cause scratches on the decorative surface during transportation, even without inserting paper or plastic membranes. The buffer layer is formed by a simple method. As a method, just before the finished product is laminated and packaged, a wax that hardens at room temperature, that is, is solid at room temperature, is used.
Thermodegradable plastics or derivatives or mixtures of these materials are heated to liquefy and applied to the back side of the mortar board using a coating device or a shot gun to form a buffer layer, or manufactured. During the process, the above substance is applied to the surface of the lower mold that forms the back side of the mortar plate using a coating device or a shot gun, and the mortar is placed on the corresponding rectangular mold and pressure molded, so that the mortar plate and the other side are completely bonded. Either method is used to form an integrated buffer layer. The above-mentioned room-temperature curable substance used is easier to use because the higher the temperature at which it liquefies, the more rapidly it solidifies after application. There are two methods to form a buffer layer as described above, but the method of applying the above-mentioned room-temperature hardening substance to the surface of the lower mold is the method in which the decorative mortar board and the room-temperature hardening substance are completely separated.・It is more desirable because it results in a smoother product, and it is not necessarily necessary to form a buffer layer on the entire back surface of the decorative mortar board, but only at the highest point on the back surface, that is, at the part that is most in contact with the surface. You can achieve that goal by doing so. Therefore, when coating the surface of the lower mold, it is sufficient to use a trowel to coat the most recessed part of the mold.

[Effect]

A buffer layer is formed at the location where the upper or front product of the laminated decorative mortar board comes into contact with the decorative surface of the lower or rear product, and the wax, wood wax, or thermoplastic that forms the buffer layer is Even if the plastics or their derivatives or mixtures solidify at room temperature, their hardness is extremely low.
When the products are stacked and moved, the buffer layer provides a very effective buffering effect, and the aggregate on the back side of the products does not cause any damage to the decorative surface.

【Example】

Using a press machine with a total capacity of 300 tons, a 400 mm length and 320 mm width roof tile frame as shown in Fig. 1 was formed. The mortar used for molding is Portland cement as standard) 1
It is made by adding cement and water in an amount of 17% of the weight of the sand to 3 parts of sand with a coarse grain ratio of 2.0 to 3.0 parts. A shot-type mixture of vinyl acetate and wax heated to 180°C and liquefied is placed in the most concave part 4 of the lower mold as shown in Figure 3, which is fixed to the lower plate of the press machine. Pour the mixture to a depth of approximately 1 mm using a gun. When poured, a film is formed on the surface almost instantaneously. The four holes of mortar described above were placed on the mold in such a state, and then the upper plate with the upper mold fixed was lowered to form a mold with a capacity of 300 tons.
Press and mold into a cup. Immediately after the molding is completed, the pressure is removed, the mold is pulled out of the press, the surface is colored and decorated, and the mold is left in a room at 40°C to heat and mature. A crosspiece tile with a buffer N3 of 6 mm is obtained.

Effects of the Invention: Fifty tiles manufactured as described above were arranged horizontally so that the decorative surface of each tile and the back side of the product were in contact with each other, and they were tied with vinyl string using a stringing machine, and separated by about 600 cm. I wasn't there. Furthermore, the buffer layer definitely remained on the back side of the product, and no peeling damage occurred. Since paper or plastic membranes are not inserted, there is no need for personnel to prepare or insert these inserts, and there is no need for personnel to collect and discard the inserts when unpacking them at the point of transport. , it was possible to prevent damage and scratches on the decorative surface in an extremely economical manner. 4,

[Brief explanation of drawings]

Fig. 1 is a perspective view of the tile frame manufactured by the method of this patent application, Fig. 2 is a longitudinal cross-sectional view of the tile frame shown in Fig. 1, and Fig. 3 is a perspective view of the lower mold for manufacturing the tile frame shown in Fig. 1. figure. 1... Decorative surface of the tile tile 2... The most protruding part on the back side of the tile 3...
Buffer layer 4 integrally molded on the tip of 2...The most recessed part of the lower mold

Claims (1)

[Claims] 1. On the back side of the decorative mortar board, room-temperature curing wax, Japanese wax,
A method of forming a thin layer of thermoplastic or a derivative or mixture of these materials as a buffer layer to prevent surface scratches during transport. 2. In forming the buffer layer according to claim 1, room temperature curing wax, wood wax, thermoplastic plastic, or derivatives or mixtures of these substances are used in the lower mold for molding the back side of the decorative mortar board. A method of applying mortar to the surface, then placing mortar on the lower mold and press-molding it to form a buffer layer that is completely integrated with the decorative mortar board, thereby preventing surface flaws that occur during movement.