JPS59207207A - Concrete molding die - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a concrete mold, and more specifically, a concrete mold that can easily and beautifully produce concrete molded products by providing an elastic body on the concrete contacting surface of the mold. It is related to.

Conventionally, when manufacturing relatively small-sized concrete moldings such as U-shaped grooves, iron molds as shown in FIG. 1 have been used.

That is, a notch 2 is made in the diagonal line of a rectangular mold body 10 so that the mold body 1 can be divided into two parts, and the two halves of the mold body 1 are combined with each other, and bolts 4 are attached using an angle 3, for example. It was fixed with adhesive etc. Concrete was charged into the molding part 5 on the inner surface of such a mold and allowed to solidify, and then the bolts 4 and angles 3 were removed to produce a concrete molded product.

Furthermore, before charging concrete, a considerable amount of oil must be applied or sprayed onto the concrete contacting surface 6 of the mold in order to remove the concrete molded product after molding with good peelability. It won't happen.

According to this concrete molding method, in order to manufacture a concrete molded product, it is first necessary to assemble the mold body 1 and form it into a predetermined shape using angles 3 and poles 1-4, etc. To take out, remove bolt 4 and angle 3,
This method has disadvantages in that it is extremely time-consuming, such as the need to separate the mold and the need to apply or spray oil to improve releasability.

In addition, since the mold is provided with dividing notches 2, the water contained in the concrete leaks through these notches 2 when the concrete matures, degrading the quality of the concrete molded product and causing the above-mentioned problem. However, since oil is used, the disadvantage is that the oil is expensive.

The purpose of the present invention is to provide a concrete mold free of such drawbacks, and more specifically,
To provide a concrete mold that can easily mold high-quality concrete molded products and does not use oil for peeling.

Therefore, the concrete mold of the present invention contains 7 to 2 parts of anti-aging agent and/or 20 to 2 parts of softener based on 100 parts by weight of heat-resistant or chemical-resistant polymer.
It is characterized in that at least the concrete contact surface is formed using an elastic body containing 50 parts by weight, and the mold body is not divided.

According to the present invention, the concrete contact surface is made of an elastic body, and this elastic body bleeds oil, so there is no need to divide the mold into two parts as in the past, and the peelability There is an advantage that there is no need to apply or spray oil to the concrete contact surface to improve the concrete contacting surface.

The present invention will be explained in more detail.

A concrete example of the concrete mold according to the present invention is shown in FIG.

As is clear from FIG. 2, in the concrete mold of the present invention, for example, the entire mold body 20 is made of a heat-resistant or chemical-resistant polymer as described above, and an anti-aging agent and/or a softening agent is added to the mold body. Manufactured from an elastic material mixed with a large amount of

The polymer used in the present invention needs to have some heat resistance and chemical resistance because concrete is slightly alkaline and concrete may solidify under heating at about 50°C. Such polymers include, for example, ethylene propylene diene monomer (EPDM), chloroprene, silicone rubber, N
One or more types of BR etc. can be mentioned.

In the mold according to the present invention, 7 to 20 parts by weight of an antiaging agent and/or 20 to 50 parts by weight of a softener are added to 100 parts by weight of the polymer as described above. This anti-aging agent or softener is often added to ordinary rubber products, but if the amount added is too large, so-called bleed will occur and it will seep onto the surface of the product. It is usually added. In the present invention, such anti-aging agent or softener 1
Contrary to the above-mentioned usual example, a large amount of Brie F is added so that the Brie F is produced. By forming the bleat in this manner, the concrete contacting surface 21 is always in the same state as the state where the ura is applied, so that good mold releasability can be obtained.

When using the polymers exemplified above, paraffin, solid paraffin, etc. can be used as the anti-aging agent. In addition, as the softener, one having a large difference in sp value from the polymer is selected so that bleeding may occur easily. For example, in the case of the above-mentioned polymers, one or more of naphthenic process oils, paraffin oils, mineral oils, etc. can be effectively used.

The mold shown in FIG. 2 is a mold manufactured integrally using the polymer described above, but in this case, concrete is introduced into the concrete introduction section 22 of the mold and allowed to harden. After the concrete hardens, as shown in Fig. 3, force is applied to the periphery of the mold body 200 in the direction of the arrow, and the mold body is distorted as shown in Fig. By peeling it off, it can be easily taken out.

FIG. 4 shows the outside of the mold body 20 made of iron plate or the like. d;
This shows an example of a case where the concrete product is covered with a reinforcing material 24, and when the concrete product is relatively large, the reinforcing material 24 is used to prevent the mold body 20 from being distorted due to the weight of the concrete. was formed.

In this case, the mold cannot be distorted as it would be if it were made entirely of polymer. However, the mold body 2
Since 0 is made of elastic material, concrete product 2
By inserting, for example, a wedge between the concrete product 23 and the mold body 20, the concrete product 23 and the mold body 20 can be separated, and the concrete product can be taken out from the mold.

In any case, compared to conventional molds, the concrete 1/product 23 can be taken out extremely easily, and the next concrete molding operation can be started immediately without wasting time and effort.

Next, the present invention will be explained in detail.

Example Chloroprene 100 parts by weight Zinc oxide 5 parts by weight Vulcanization accelerator
1 part by weight magmedium oxide
4 parts by weight carbon 50 parts by weight Hytron 50 parts by weight stearic acid 1 part by weight anti-aging agent (paraffin wax) 10 parts by weight softener (paraffin oil) 25 parts by weight Concrete molding as shown in Figure 1 A mold was manufactured, concrete was filled into the concrete introduction part 22, and a concrete product was manufactured.

When the manufactured concrete product was peeled off by distorting the mold as shown in FIG. 3, it was found that the product could be peeled off very easily and that the workability was good. Moreover, the surface of the concrete molded product was extremely smooth. This is thought to be due to moisture not escaping from the mold.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional concrete mold, Fig. 2 is a perspective view of a concrete example of the mold according to the present invention, and Fig. 3 is a sectional view showing how to take out a concrete product manufactured with the concrete example. , FIG. 4 is a sectional view of another embodiment of the present invention. 20...Mold body, 21...Concrete contact surface, 22...Concrete introduction part, 23...Concrete product, 24...Reinforcement material. Applicant's agent Tadashi Amemiya 43 Figure 1 Cause 2 Cause 3 @ (b) ↓ Figure 4 ■

Claims (1)

[Claims] (11) At least the concrete contact surface is formed with an elastic body in which 7 to 20 parts by weight of an anti-aging agent and/or 20 to 50 parts by weight of a softener are added to 100 parts by weight of a heat-resistant or chemical-resistant polymer. Characteristic concrete mold.