JP2016043599A - Assembly type frame member forming wall surface of shaping mold, and assembling method of the frame member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assembly type frame member forming a wall surface of a shaping mold and an assembling method of the frame member with which assembling of a frame is carried out by suitably and temporarily holding a shaping frame to suitably form the shaping frame, and detaching may be easily carried out due to a gap in contraction ratio between shaping material and an assembly type frame member.SOLUTION: A frame consisting of a plurality of construction elements 4 is made of a polyolefin resin. The construction elements 4 are rectangular box shape blocks comprising upper projecting parts 2 and backside recessed parts 3, and may be assembled in a straight line or rectangular shape by mutually connecting their right and left sides. In addition, the contraction force upon hardening of the shaping material is distributed in direction of the assembly type frame member of outer peripheral side surface, thereby a gap in contraction ratio between the shaping material and the assembly type frame member is generated. There is also provided an assembling method of the frame member using the construction elements.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a wall surface forming mold member that temporarily holds and holds a wall surface when an injection of a mold taking agent for forming a mold for molding, and an assembly structure.

Conventionally, as a method for producing a mold by pouring a mold taking agent, the mold frame is configured by fixing a plywood or a metal plate so that the mold taking agent does not flow out, and the mold is taken by pouring silicone for mold taking. I'm making it.
When the molding material is gypsum or a synthetic resin, a mold release agent is necessary because sticking occurs on a plywood or a metal plate.

JP-A-6-190844

  In the manufacturing method described above, the efficiency of changing the width, depth, and height of the wall-forming mold is poor, it is difficult to make the corner of the wall-forming mold at a right angle, and the gypsum or synthetic resin agent is fixed. As a result, the wall surface forming form is easily damaged and is difficult to reuse.

In view of such a conventional problem, the present invention can suitably hold and hold the wall-forming mold form and can suitably mold the mold preparation surface, and it is easy to assemble and remove the mold form. Can be used.
It is another object of the present invention to provide a mold-forming wall-forming mold member in which the cast molding agent is preferably easily released after curing.
The above problems can be solved.

In order to solve the above-described conventional problems and achieve the intended purpose, the mold mold wall surface forming assembly formwork member according to the present invention is characterized in that the construction element is made of a block-shaped synthetic resin, Since the construction elements of the upper and lower convex portions and the back concave portions are alternately connected to the left and right to be temporarily fixed, the height and width of the mold can be suitably assembled.
The construction element of the wall surface forming assembling formwork member is composed of a polyolefin resin body having a bending elastic modulus of 1,500 MPa to 2,000 MPa and a bending stress of 43 MPa to 55 MPa.

Conventional wall-forming formwork members are not elastic, and the shrinkage when hardening the mold-making material is concentrated on the poured upper part, so that the mold-working material is fixed at the time of demolding. It was difficult to use.
Further, if there is too much elasticity, the mold frame is formed to swell with the weight of the molding material, so that it is difficult to make straight lines and corners at right angles, which hinders casting operations.

Since the construction element is elastic, it can be distributed in the direction of the outer and side assembly formwork members without concentrating the force that shrinks the molding material when it is cured.

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Accordingly, the side surface direction of the molding material is shrunk, and an error of the shrinkage rate is generated between the adjacent assembling formwork members, so that the demolding is easy and can be suitably reused. The purpose is to provide a method.

As described above, in the present invention, a construction element is constituted by a polyolefin resin body having a bending elastic modulus of 1,500 MPa to 2,000 MPa and a bending stress of 43 MPa to 55 MPa, and a plurality of construction elements are assembled. A wall surface forming mold can be formed.
Furthermore, by using a mold-forming material having a shrinkage ratio of 0.5% to 5% at the time of curing, the mold-forming material also contracts in the direction of the elastic wall-forming mold, so that the mold and the mold Demolding is facilitated by the occurrence of shrinkage error in the portion in contact with the material.

Further, a plurality of construction elements are formed by forming the construction element into a rectangular block shape, integrally providing two connecting projections on the upper end surface of the construction element, and further providing two connecting recesses on the lower end surface. Are arranged in the vertical and horizontal directions, and the construction elements are alternately connected via the connecting convex portions and the connecting concave portions, so that the width, depth and height of the formwork can be fixed without fixing them with temporary fasteners or plywood. Can be easily changed.
Then, by assembling such a formwork, the formwork can be easily assembled and removed, and the construction element can be suitably reused by preventing the construction element from being damaged.

  In addition, by flattening the upper end surface of the connecting convex portion and the outer peripheral edge of the construction element, it is easy to remove the part where the mold frame and the molding material are in contact with each other, and the outer peripheral edge of the cured molding material is made flat. can do.

  In addition, the construction elements can be easily connected and separated by temporarily fixing the engaging convex portions by pressing the engaging convex portions by the elastic force of the two leaf spring portions between the engaging concave portions, and can be reused. can do.

It is a front view of the construction element which constitutes the outer formwork of the present invention. It is a top view of a construction element. It is a bottom view of a construction element. It is a rear view of a construction element. It is explanatory drawing of the construction element connected mutually. It is explanatory drawing which showed the shrinkage | contraction image at the time of hardening of the shaping | molding material in case an outer form frame does not have elasticity. It is explanatory drawing which showed the shrinkage | contraction image at the time of hardening of the shaping | molding material in case an outer mold frame has elasticity.

Embodiments of the present invention will be described below.
Next, embodiments of the present invention will be described with reference to the drawings.
Reference numeral 4 denotes a construction element constituting the outer mold, which is alternately connected to the left and right by two upper convex portions 2 and two back side concave portions 3 and temporarily fixed.

The construction element is a rectangular box-shaped construction element having a polyolefin resin body. The polyolefin resin body has a bending elastic modulus of 1,500 MPa to 2,000 MPa and a bending stress of 43 MPa to 55 MPa. preferable.
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  When the elastic modulus of the polyolefin resin body is less than 1,500 MPa, the construction element 4 is likely to be deformed outward by the mold taking material, and the wall of the mold making material swells or is assembled. On the other hand, when the elastic modulus exceeds 2,000 MPa, the construction element becomes too hard, and the shrinkage when the molding material is cured concentrates on the upper part, and the shrinkage with the assembly formwork member occurs. Since the error of the rate does not occur, the construction element 4 is easily damaged due to the inconvenience that the mold-taking material is fixed at the time of demolding, so that the reuse becomes difficult.

The mold taking material has a shrinkage ratio of 0.5% to 5% when cured.
Silicone for molding, gypsum or synthetic resin is preferred.

In addition, when the shrinkage ratio at the time of curing of the above-described molding material is 0.5% or less, an error in shrinkage ratio with the construction element 4 does not occur, so that the construction element assembled at the time of demolding is fixed. Inconvenience such as end up occurs.
On the other hand, if the shrinkage ratio at the time of hardening of the mold material exceeds 5% or more, the construction element 4 is likely to be deformed inward due to the shrinkage at the time of hardening, and the wall surface of the mold material is formed or curved. Inconveniences such as inaccurate mold making occur.

  As shown in FIGS. 1 to 4, the construction element 4 includes two engagement convex portions 2 on the upper end surface of the construction element, and a plurality of construction elements via the two engagement concave portions 3 on the lower end surface. The elements 4 are provided in a corresponding arrangement so as to be fitted to each other and temporarily held when the elements 4 are alternately arranged vertically and horizontally.

In addition, the engaging convex portion 2 presses the engaging convex portion 2 by the elastic force of the leaf spring portion 8 between the two engaging concave portions, and straddles the two construction elements 4 and 4 alternately on the left and right. Fixed.
Therefore, they can be easily connected, and the assembly and disassembly of the formwork can be suitably performed by combining the construction elements 4.

At the time of demolding, the engaging convex portion 2 of the construction element 4 has a flat upper end surface, so that even if the molding material adheres, it can be easily peeled off by a relatively small area individually, Since the formwork wall surface assembled by the construction element 4 is also a flat surface, it is easy to peel off from the surface of the molding material.
Therefore, breakage of the construction element 4, particularly breakage of the engaging convex portion 2, can be suitably prevented, and the construction element 4 can be suitably reused.

2 Convex part for engagement 3 Concave part for engagement 4 Construction element (mold wall for forming mold wall for mold making)
5 Molding material 6 Molding prototype 7 Shrinkage direction 8 Leaf spring

Claims (5)

  A mold-forming mold wall surface forming assembling type frame member comprising a plurality of block-shaped construction elements, wherein the construction elements are assembled in a straight line and at a right angle by temporarily holding the construction elements.   2. An assembly type frame member for forming a mold mold wall surface according to claim 1, characterized in that it comprises a construction element having a bending elastic modulus of 1,500 MPa to 2,000 MPa and a bending stress of 43 MPa to 55 MPa. The building element for forming a mold wall surface for molding according to claim 1 or 2, wherein the construction element is made of a polyolefin resin body.   The mold wall surface forming assembling model for mold taking according to claim 1, 2 or 3, wherein the upper convex part and the rear concave part are alternately fitted and temporarily fixed and held, whereby the width, depth and height are easily changed. Frame member. By using a mold-forming material having a shrinkage ratio of 0.2% to 5% at the time of curing, an error in shrinkage ratio can be generated between the elastic assembly-type formwork, and demolding can be performed. The mold-forming mold wall surface forming and assembling frame member according to claim 1, 2, 3, or 4, which is easy and can be suitably reused.

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