JP4047925B2 - Reinforced concrete mold manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforced concrete mold mixed with fibers and a method for producing the same. In addition, the fiber in this application means the thing of the property which can contribute to various strength improvement of concrete, and the concrete which does not contain such a fiber is hereafter called non-reinforced concrete.
[0002]
[Prior art]
Fiber reinforced concrete in which metal fibers and organic fibers are mixed in concrete is known in order to increase the strength of a mold using concrete so that it can be applied to an injection mold where high pressure is applied.
[0003]
[Problems to be solved by the invention]
By the way, when a mold is manufactured with the fiber reinforced concrete, the reinforcing fibers are exposed to the molding surface, and as a result, the surface of the molded product may be roughened or difficult to release. Accordingly, the present invention aims to eliminate such problems.
[0004]
[Means for Solving the Problems]
The invention of claim 1 according to production method of reinforced concrete type of application for solving the above problems includes a backing layer with reinforced concrete to incorporate textiles, and the surface layer constituting the molding surface by the concrete containing no fibers And a concrete type manufacturing method in which the backing layer and the surface layer are coupled by an anchor,
Cover the model with primary covering,
Planting part of the anchor on this primary covering, putting the other part of the anchor on the primary covering,
Injecting reinforced concrete mixed with fibers from above to form a backing layer that integrates the portion of the anchor that is on the primary coating,
Then removing the primary coating and projecting the portion of the anchor to the surface of the backing layer;
Injecting fiber-free concrete between the model and the backing layer to form a surface layer and integrating the part of the anchor;
The backing layer and the surface layer are bonded through the anchor.
[0005]
A second aspect of the invention is characterized in that, in the first aspect, the primary coating is a sheet wax formed to correspond to the thickness of the surface layer.
[0006]
A third aspect of the present invention, in the first aspect, before Symbol anchor forms a V-shape, insert the peak portion of one end side to the primary coating, and wherein the projecting the other end.
[0009]
【The invention's effect】
The method of manufacturing a reinforced concrete mold according to claim 1 is to first cover the model with a primary coating, inject reinforced concrete thereon to form a backing layer, and then remove the primary coating, so that the model and the backing layer are separated. Non-reinforced concrete is injected into the space formed between them to form a surface layer, and the anchors enter both the backing layer and the surface layer, whereby both layers can be joined and integrated. Thereby, a reinforced concrete mold having a two-layer structure which is firmly integrated is manufactured.
Therefore, it a high strength entire mold with the backing layer consisting of strengthening concrete, the surface layer becomes excellent in smooth transferability molding surface because there is no reinforcing fibers, precisely the surface of the molded article It can be done and release is smooth.
[0010]
Further, strengthening concrete type, a backing layer made of reinforced concrete, a two-layer structure of the surface layer constituting the molding surface in a non-reinforced concrete, since between these surface layer and the backing layer bonded anchor, these 2 Can strengthen the bonding of layers and strengthen the surface layer.
[0011]
The anchor can be embedded in and integrated with both the surface layer and the backing layer, thereby exhibiting an anchor effect that firmly bonds and integrates the two layers.
[0013]
At this time, the anchor planted some advance to the primary object covering prior to the injection of strengthening concrete, after which another portion exiting onto the primary coating implanted into the backing layer.
Furthermore, by removing the primary covering and projecting the part of the anchor to the surface of the backing layer, a concrete containing no fiber is injected between the model and the backing layer to form a surface layer. The part is integrated into the surface layer.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment in which fiber reinforced concrete is used as reinforced concrete will be described with reference to the drawings. 1-6 shows the manufacturing process for shape | molding the fiber reinforced concrete type | mold 1 shown in FIG. FIG. 1 shows a manufacturing process of the model 2. The model 2 uses an actual product, and its back surface is backed with an appropriate reinforcing material and attached to the base 3. However, a master model can also be used.
[0016]
FIG. 2 shows a primary coating process. A known sheet wax 4 is attached to the surface of the model 2 to form a primary coating. The thickness of the sheet wax 4 is the thickness of the surface layer, and the anchor 5 is planted on the surface of the sheet wax 4 (the surface on the backing layer side, hereinafter the same).
[0017]
The anchor 5 is formed by forming a metal wire into a V shape or a pine needle shape, and inserts a pointed head on one end side into the sheet wax 4 and projects the other end side onto the surface of the sheet wax 4. . The material and shape of the anchor 5 are arbitrary as long as the anchor effect can be exhibited. Further, the gate block 6 is attached to the planned gate position. A notch 6a is provided at a part of the tip of the gate block 6 to form a slight gap with the base 3, and a part of the sheet wax 4 is also inserted into the notch 6a to form a runner forming portion 4a. Form. The runner molding portion 4 a connects the gate block 6 and the main body portion around the model 2.
[0018]
FIG. 3 shows a step of forming a backing layer. The periphery of the model 2 covered with the sheet wax 4 is surrounded by a mold 7, and liquid fiber reinforced concrete is injected from the injection port 8 and solidified to solidify the backing layer 10. obtain. The backing layer 10 is solidified in a state where the anchor 5 is integrally embedded in a surface (hereinafter referred to as a bonding surface) that is bonded to the surface layer. At this time, the second inlet block 9 is provided so that the lower end thereof penetrates the backing layer 10 and reaches the sheet wax 4. The gate block 6 is also embedded in the backing layer 10 integrally.
[0019]
FIG. 4 shows a primary coating removing process, in which the backing layer 10 is removed from the model 2 together with the mold 7 and the sheet wax 4 is removed by a known means such as heating. As a result, the surface of the backing layer 10 is in a state in which the tip of the anchor 5 protrudes. Moreover, the runner molding part 4a is also removed at the same time. Further, by removing the second inlet block 9, a second inlet 11 penetrating the backing layer 10 is formed.
[0020]
FIG. 5 shows a surface layer forming step, in which the periphery of the model 2 is surrounded again by the mold 7 in which the backing layer 10 is integrated, and the space between the backing layer 10 and the model 2 once occupied by the sheet wax 4. Non-reinforced concrete is injected from the second injection port 11 into the head. Thereby, the surface layer 12 made of non-reinforced concrete covering the surface of the model 2 is formed.
[0021]
Since the surface layer 12 is solidified in a state where the pointed side of the anchor 5 is embedded and integrated, the surface layer 12 is firmly bonded and integrated with the backing layer 10 via the anchor 5 and is strongly reinforced by the backing layer 10. The non-reinforced concrete is in intimate contact with the surface of the model 2 while realizing an unprecedented durability. Prior to the injection of the non-reinforced concrete, a runner forming mask member 13 that connects the notch 6 a at the lower end of the gate block 6 to the model 2 is provided on the base 3.
[0022]
FIG. 6 shows a completed process, in which the mold 7 is removed from the model. In this state, since the surface of the surface layer 12 forms the molding surface 14, and the non-reinforced concrete of the surface layer 12 does not have reinforcing fibers, the molding surface 14 transferred from the surface of the model 2 becomes dense and smooth, Has faithful transferability.
[0023]
FIG. 7 shows an injection mold 1 using the finished product of FIG. 6, and this injection mold 1 is configured as a female mold. Further, after removing the gate block 6, the gate hole 15 is formed, and after removing the runner formation mask member 13, one end faces the molding surface 14 and a runner 16 communicating with the gate hole 15 is formed. And via the runner 16, the molding resin can be filled into the cavity formed on the molding surface 14 side at the time of injection molding.
[0024]
Reinforced concrete used in the present invention is a mixture of various reinforcing fibers such as inorganic fibers such as metals and organic fibers such as resin as a reinforcing material, improving at least one of bending strength, tensile strength and fracture toughness. Fiber reinforced concrete.
[0025]
In addition, as the reinforced / non-reinforced concrete used in the present invention, those having various compositions and performances can be used depending on the purpose. For example,
When used for an injection mold having an injection pressure of about 800 kgf / cm 2 (square centimeter, hereinafter the same), the strength of the fiber reinforced concrete is about 300 to 600 kgf / cm 2, preferably about 400 to 500 kgf / cm 2.
[0026]
Thus, the reinforced concrete type | mold which concerns on a present Example consists of a two-layer structure of the backing layer 10 which consists of reinforced concrete, and the surface layer 12 which comprises the molding surface 14 with non-reinforced concrete. Therefore, the backing layer 10 made of reinforced concrete can make the entire mold high in strength, and the surface layer 12 has no reinforcing fiber, so that the molding surface is smooth and excellent in transferability, and the surface of the molded product is dense. And release is smooth. In addition, by connecting the surface layer 12 and the backing layer 10 with the anchor 5, these two layers can be strongly bonded, and the surface layer 12 is strengthened.
[0027]
The anchor 5 enters both the surface layer 12 and the backing layer 10 and embeds and integrates to exert an anchor effect to firmly bond and integrate the two layers, and is formed separately and onto the sheet wax 4. Since it is planted, the material, shape and size can be freely adjusted, and the necessary anchor effect can be easily realized.
[0028]
Further, since the anchor 5 can be temporarily fixed using the sheet wax 4, it can be easily embedded and integrated into the backing layer 10 made of reinforced concrete, and the space for forming the surface layer 12 can be obtained by removing the sheet wax 4. It is possible to make it protrude. Moreover, since the surface layer 12 is formed using the space formed between the backing layer 10 and the model 2, the surface layer 12 can be formed with a relatively uniform thickness along the molding surface 14, and the backing layer 10 can be integrated.
[0029]
The present invention is not limited to the above-described embodiments, and various modifications and applications are possible within the same inventive principle. For example, the fiber reinforced concrete mold obtained by the production method of the present invention can be used for various moldings that require high strength in addition to the injection mold.
[0030]
Moreover, the anchor can use the reinforcing fiber derived from the reinforced concrete projecting on the surface of the backing layer, and the anchor planting work becomes unnecessary, so the number of parts can be reduced. It is also possible to inject a surface layer of non-reinforced concrete prior to injection of reinforced concrete, and to inject and integrate fiber reinforced concrete or the like before solidification. In this way, reinforced concrete can be poured directly onto the model and laminated without using a primary coating.
[0031]
8 to 11 show reference examples in which such separate anchors and primary coatings are not used, FIG. 8 is a step of forming a backing layer, FIG. 9 is a step of covering the model with the backing layer, and FIG. 10 is a surface layer forming step, and FIG. 11 shows a completed reinforced concrete mold. In addition, the same code | symbol is used for the part which is common in the previous Example, and duplication description is abbreviate | omitted.
[0032]
First, in FIG. 8, in order to form the backing layer 10 having fine irregularities 18 on the entire bonding surface, a mold 7 and a lower mold 17 are prepared, and liquid fiber reinforced concrete is poured from the inlet 8 and cured. Thus, the backing layer 10 having fine irregularities 25 distributed over the entire bonding surface is obtained. Since the unevenness 18 functions in the same manner as a separate anchor in the previous embodiment, it is an integral anchor provided in the backing layer 10, and its size, shape, and number can be arbitrarily set.
[0033]
Here, the lower mold 17 is formed so as to match the cross-sectional shape of the model 2, the base 3 and the surface layer 12 in FIG. 10 integrated, and the entire surface on the backing layer 10 side of the backing layer 10 is formed. Many small irregularities for forming the irregularities 18 are formed.
The mold 7 is provided with a second inlet block 9 in advance so as to penetrate the backing layer 10.
[0034]
Subsequently, as shown in FIG. 9, the lower mold 17 and the second inlet block 9 are removed to form a second inlet 11 penetrating the backing layer 10, and the backing layer 10 together with the mold 7 The model 2 and the base 3 placed on the model 17 are placed over the mold 17. An extended portion 2a extending on the base 3 to the gate block 6 side is provided in a part of the model 2, and the tip portion is sandwiched in the cutout portion 6a.
[0035]
Next, as shown in FIG. 10, the surface layer 12 is formed by injecting liquid non-reinforced concrete containing no fiber from the second inlet 11 into the space between the backing layer 10 and the model 2. Then, after the surface layer 12 is hardened, the reinforced concrete mold shown in FIG. 11 is obtained by removing the mold 7, the model 2 and the base 3. When the model 2 and the gate block 6 are removed, a runner 16 having one end facing the molding surface 14 and communicating with the gate hole 15 is formed after the extending portion 2a.
[0036]
At this time, the surface layer 12 is firmly formed by the anchor effect of the numerous fine irregularities 18 formed on the bonding surface of the backing layer 10 and the reinforcing fibers derived from the backing layer 10 exposed on the surfaces of the irregularities 18. Combine with. Accordingly, it is not necessary to provide a separate anchor as in the previous embodiment, and it is not necessary to form and remove the primary coating, so that it is possible to greatly reduce both the number of parts used and the labor of mold production.
[Brief description of the drawings]
FIG. 1 is a diagram showing a model forming process according to an embodiment. FIG. 2 is a diagram showing a primary coating process according to the embodiment. FIG. 3 is a diagram showing a backing layer forming process according to the embodiment. FIG. 5 is a diagram showing a primary layer removal process. FIG. 5 is a diagram showing a surface layer forming process according to the embodiment. FIG. 6 is a diagram showing a completion process according to the embodiment. shows 8] FIG 9 showing the backing layer forming step according to a reference example FIG. FIG. 10 showing a step of covering the backing layer according to the reference example to the model surface layer forming step according to a reference example 11 ] Cross section of concrete mold according to reference example [Explanation of symbols]
1: fiber reinforced concrete mold, 2: model, 3: base, 4: seat wax, 5: separate anchor, 6: gate block, 7: formwork, 8: inlet, 9: second inlet block, 10: Backing layer, 11: Second inlet, 12: Surface layer, 13: Molding surface, 14: Runner forming member, 15: Runner, 16: Gate hole, 18: Concavity and convexity (integrated anchor)

Claims (3)

A backing layer using reinforced concrete to incorporate textiles provided with a surface layer which constitutes the molding surface by the concrete containing no fibers, in the preparation process of the concrete form in which the backing layer and the surface layer bonded by the anchor,
Cover the model with primary covering,
Planting part of the anchor on this primary covering, putting the other part of the anchor on the primary covering,
Injecting reinforced concrete mixed with fibers from above to form a backing layer that integrates the portion of the anchor that is on the primary coating,
Then removing the primary coating and projecting the portion of the anchor to the surface of the backing layer;
Injecting fiber-free concrete between the model and the backing layer to form a surface layer and integrating the part of the anchor;
A method for producing a reinforced concrete mold, wherein the backing layer and the surface layer are bonded via the anchor.   The method for producing a reinforced concrete mold according to claim 1, wherein the primary coating is a sheet wax formed to correspond to the thickness of the surface layer.   The method for producing a reinforced concrete mold according to claim 1, wherein the anchor has a V shape, a pointed head at one end thereof is inserted into the primary coating, and the other end is protruded.

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