JPH09158471A - Resin form made of laminated material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin form high in rigidity while making the surface property excellent by forming a backup face behind a placing face into plate shape with protruding parts and recessed parts alternately protruded, forming a surface layer on the placing face side of resin material excellent in surface property, and forming the interior of the backup face of reinforced filling material excellent in rigidity. SOLUTION: A backup face 30B behind a placing face 30A of a resin form is provided with protruding parts 32 extended longitudinally, and recessed parts 34 are formed between the protruding parts 32. In the case of a protruding type resin form 30P, a cross section is formed of a plate protruded orthogonally to the placing face 30A, and the backup face 30B is protruded in plate shape, or the protruding parts 32 and the recessed parts 34 are alternately bent. Resin material excellent in surface property is used for the surface layer of the placing face 30A, and resin material of high strength material is used as core material for the interior.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a laminated resin mold for concrete pouring, which is molded by blow molding or injection molding. The present invention relates to a laminated resin mold which has a long life by reducing the deformation with time.

[0002]

2. Description of the Related Art Conventionally, as a concrete pouring formwork, wood which has been processed and formed is used because it is inexpensive, but the surface of the formwork is used once or twice or at most three to four times. Most of the scratched molds (panels) were in a disposable state and were discarded by incineration. Such a usage example is a big problem in terms of resource protection and environmental problems in the present day when the depletion of wood resources is just around the corner. On the other hand, from the viewpoint of protecting such wood resources, a resin mold produced by an injection molding machine has started to be used as a substitute, is lightweight and easy to handle, and can withstand repeated use 4 to 5 times. There was also an advantage. However, the resin molds produced by the injection molding machine can withstand repeated use of 4 to 5 times or more, are lightweight and easy to handle, but once damaged severely, it is difficult to repair and it is necessary to replace each panel. At the same time, it has the drawback that the production cost is extremely high compared to wood panels. Therefore, recently, a resin mold has been produced easily and inexpensively by a blow molding machine and has begun to be used. The blow-molded resin mold is, for example, as shown in FIG.
As shown in FIG. 11, the backup surface 20B behind the smooth pouring surface 20A for pouring concrete has convex and concave portions arranged in a grid pattern, and its cross section has a substantially corrugated shape as shown in FIG. In addition, the backup surface 20B is bent, and a hollow portion is formed inside so that the structure is lightweight and has rigidity against bending and compression.

[0003]

However, these resin molds are molded and processed only with a non-reinforced resin such as polypropylene resin, and have excellent surface properties and good mold releasability from concrete, However, there is a problem that rigidity due to deformation such as is insufficient and the deformation due to the lateral pressure of concrete is large, and permanent deformation remains as the frequency of use progresses, and it cannot be used in places where flatness is required.
On the other hand, when the resin form is molded with only the resin containing the reinforcing material, the rigidity is excellent, but the fiber material, which is the material of the reinforcing material, is exposed on the surface and concrete is likely to adhere to it, and nailing etc. There is also a drawback that it is easy to tear in one direction due to the action of, and the touch on the surface is not always good. An object of the present invention is to solve such problems and provide a resin mold having good surface properties and sufficient rigidity.

[0004]

In order to solve the above problems, in the present invention, in the first invention, a resin form made of a laminated material for concrete pouring, and the pouring surface is smooth. The backup surface behind the casting surface is formed in a flat plate shape in which the convex portions and the concave portions alternately extend in the longitudinal direction of the mold and the cross-section projects orthogonally to the casting surface. Ruka,
Alternatively, it is formed into a substantially corrugated shape so as to have a hollow portion inside, and at least the surface layer on the driving surface side is made of a resin material having excellent surface properties, and at least the inside of the backup surface has excellent rigidity. Reinforcement filling material. Further, in the second invention, the resin material of the surface layer in the first invention is a polypropylene resin, and the resin material inside is a reinforced polypropylene resin material. Furthermore, in the third invention, the resin molds made of these laminated materials are molded by co-injection injection molding.
Then, in the fourth invention, the resin molds made of these laminated materials are molded and processed by multilayer blow molding. Further, in the fifth invention, the resin material of the surface layer of the resin mold made of these laminated materials is a resin sheet, and the resin sheet is bonded to a mold and bonded by blow molding, or injection molding is performed to perform a molding process. It was supposed to be.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the driving surface is formed as a smooth flat surface, and the backup surface behind the driving surface has convex portions and concave portions alternately extending in the longitudinal direction of the mold and having a cross section. It is formed in a flat plate shape that protrudes orthogonally to the driving surface, or is bent so as to have a substantially corrugated shape and has a hollow portion inside, and at least the surface layer of the driving surface has a surface property. It is made of a resin material with excellent heat resistance, and at least the inside of the backup surface is molded as a reinforcing material filling material with excellent rigidity.Compared to a simple flat panel shape, the uneven backup surface provides reinforcement for strength. Not only is it done, but the reinforcing material filling material is put inside each member as a core material, the rigidity is remarkably enhanced, and since a resin material with good surface property is used for the surface, Good appearance and feel Resin mold with high good concrete 設用 flatness is obtained. In the second invention, the surface resin material is a polypropylene resin having good surface properties,
Since the resin material inside is a reinforced polypropylene resin material with high strength (for example, fiber reinforced polypropylene resin material), it has a good surface property, appearance and feel, and has a high degree of flatness. To be In the third invention and the fourth invention, these resin molds are molded by co-injection injection molding or multilayer blow molding, respectively, so that they can be mass-produced easily and easily at a low manufacturing cost. Further, in the fifth invention, a resin sheet is adopted as a resin material for a surface layer of a resin mold made of these laminated materials, and the resin sheet is bonded to a mold and blow-molded or injection-molded for molding. Therefore, mass production can be performed easily and easily at a low manufacturing cost.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 8 relate to an embodiment of the present invention,
1 is a perspective view of a resin mold, FIG. 2 is a cross-sectional perspective view of a protruding resin mold, FIG. 3 is a cross-sectional perspective view of an internal hollow resin mold showing another embodiment, and FIG. 4 is another embodiment. 5 is a cross-sectional view of a bending resin mold, FIG. 5 is a cross-sectional view of a resin sheet-bonded resin mold, FIG. 6 is a vertical cross-sectional view of a main part of a co-injection injection molding machine, and FIG. 7 is a multi-layer blow molding machine. FIG. 8 is a vertical sectional view of a main part of the multilayer blow molding machine, and FIG. 9 is a vertical sectional view of the bonding blow molding machine.

FIG. 1 shows a laminated resin mold 30 of the present invention. A placing surface 30A of the resin form 30 is formed into a smooth flat surface, and a backup surface 30 behind the placing surface 30A.
In B, the convex portions 32 extending in the longitudinal direction are provided in parallel at equal intervals, and the concave portion 34 is formed between the convex portion 32 and the adjacent convex portion 32. As shown in FIG. 2, the cross section thereof has a projecting resin mold 30P formed by a flat plate projecting orthogonally to the driving surface 30A, and a hollow portion inside as shown in FIG. A substantially corrugated internal hollow resin mold 30
Q, as shown in FIG. 4, a bending type resin mold 30R for forming a backup surface bent in a substantially corrugated shape by stacking multiple layers (three layers in the case of FIG. 4) of resin material, and placing a resin sheet. Resin sheet pasted resin mold 3 on the front side
It is divided into 0S.

In either type, the backup surface 30B projects in a flat plate shape as shown in FIG. 2, or as shown in FIGS. 3 to 5, the convex portions 32 and the concave portions 34 alternate in a substantially corrugated shape. It is bent. The cross-sectional shapes of the convex portion 32 and the concave portion 34 are usually formed in a trapezoidal shape as shown in FIG. 3, but may be a smooth curved shape such as a sine wave.
Further, as shown in FIGS. 3, 4 and 5, the back surface of the backup surface 30B comes into contact with the back surface of the driving surface 30A and is fused and integrated to form a hollow portion 30C sealed inside the convex portion 32. To form.

[0009] In the present invention, in any type, instead of molding with a single resin material, the surface layer such as the driving surface 30A, etc., where surface properties are important, and the portion forming the inside are formed. Different kinds of resin materials were used. That is, for the surface layer, for example, a resin material having excellent surface properties such as polypropylene resin is used, and as the core material, a resin material having relatively high strength such as glass fiber reinforced polypropylene resin material is used inside. . Specifically, the co-injection injection molding machine 50 shown in FIG.
2 and 3 by using the multi-layer blow molding machine 60 of FIG.
As described above, a molded article having a two-layer structure in which the core material 42 is held inside the surface layer material 40 is produced. As described above, the surface layer material 40
Is a resin material having excellent surface properties such as polypropylene resin, and the core material 42 is a resin material having a relatively high strength such as a glass fiber reinforced polypropylene resin material.

FIG. 4 shows a bending type resin frame 30R, and the backup surface 30B has a surface layer material 40, a core material 42 and a back surface material 4.
4 of three layers of resin material are bent to form a flat surface layer 40, which is a driving surface 30A, or the surface layer 40 shown in FIG.
The surface layer material 40 is made of a resin material having excellent surface properties by fusion-bonding a portion in contact with the flat plate-shaped casting surface 30A in which three layers including the core material 42 and the back surface material 44 are laminated. As the back surface material 44, for example, the recycled material that has been used and the recycled material in the process are effectively used to improve the economical efficiency. On the other hand, FIG.
In the example shown in (1), the backup surface 30B is formed only by the core material 42, and the resin sheet S is used as the surface layer material 40 only for the driving surface 30A which requires smoothness. With this structure, the placement surface 30A, which requires smoothness, is made of a resin material having excellent surface properties, and the backup surface 30B is made of a resin material having high strength. The rigidity of is improved. The resin sheet S is usually manufactured by extrusion molding. The resin sheet S used may be a single layer or a multilayer.

FIG. 6 shows a co-injection injection molding machine 5.
In the cavity 55 formed by the fixed mold 50D and the movable mold 50E, the first injection unit 5
0A and the second injection unit 50B respectively inject different kinds of molten resin materials to obtain a resin molded product made of a laminated resin. That is, the second molten resin is injected and filled into the cavity 55 from the second injection unit 50B via the resin passage 54 of the nozzle 53 and the resin passage 56 in the mold, and at the same time, the second injection unit 50A discharges the nozzle 51 from the nozzle 51. Resin passage 52
By injecting and filling the first molten resin into the cavity 55 via the in-mold resin passage 56, the first resin is laminated on the outer side of the second resin (2 in the case of FIG. 6).
A laminated resin molded product of (layer) can be obtained.

FIG. 7 shows a multi-layer blow molding machine (three-layer blow molding machine) 60. Inside the die 61, resin passages of various (three kinds in FIG. 7) resin materials are provided, and With the extruder 62A, the second extruder 62B, and the third extruder 62C, different molten resin materials are supplied into the die 61, and as shown in FIG. 8, a multi-layer (three-layer) laminated resin molded article is formed. Blow molding.

On the other hand, what is shown in FIG. 9 is a bonding blow molding machine 70, in which a pair of left and right molds 78, 78 are disposed below the die head 72 so as to be freely contactable and separable, and On the upper part of 78, a roll 80 wound with a resin sheet S formed of a flat plate is placed at a position to be hung down along the surface of the parison P discharged from the die head 72 and via a roll base 82. It is arranged. Roll 8
At the lower end of 0, there is provided a roll base 82, and a cutter 90 whose tip is formed by a sharp blade that horizontally moves back and forth in the parison direction by the operation of the air cylinder 90a is provided, which is in front of the cutter 90 and is in the center. A cutter seat 90b having a groove portion into which the blade edge of 90 is fitted is provided, and the hanging resin sheet S can be cut at any time without damaging the surface of the parison P. In addition, a sheet clip 84 for gripping the lower end of the resin sheet S and holding the resin sheet S vertically downward during operation is provided at the lower end of the mold 78. With the bonding blow molding machine 70 configured as described above, it is possible to mold a resin sheet bonding type resin frame 30S as shown in FIG. 5, for example, in which resin sheets S are bonded.

In addition to these methods, there is also a method of molding a multi-layer laminated resin form, for example, using a blow molding machine, the surface layer of the product is made of a resin having excellent surface properties, and the backup surface side is made of two colors of reinforced resin. A method of extruding and molding a parison,
A method of forming a laminated sheet in which a resin sheet having an excellent surface property is used as a surface layer by vacuum pressure forming and a resin sheet having high strength as an inner layer, a method of forming the above-mentioned multilayer sheet by vacuum pressure forming, and the like are considered.

As described above, in the laminated resin form 30 of the present invention, the surface layer material 40 is made of natural (PP) resin having a good surface property and feel, and the inside or the backup surface 30.
Since a glass inorganic reinforced (PP) resin is used as the core material 42 for strengthening the rigidity of B, the driving surface 30 having good surface properties
It has A and the rigidity is significantly improved compared to the conventional one. Further, in the resin mold 30 obtained by multi-layer blow molding or laminating resin sheets, the inner layer can be a recycled material, and the material cost can be reduced by effective use of resources. The reinforcing material used for the core material 42 is
Glass fibers and inorganic minerals (talc, mica, wollastonite, calcium carbonate, etc.) can be used, and during production, release agents, heat-resistant agents, weathering agents, colorants, etc., and various commonly used Additives can be used.

[0016]

As described above, in the present invention, the resin mold is made of a laminate made of different resin materials, so that the resin mold having high rigidity can be easily and easily maintained while maintaining good surface properties. Obtainable.

[Brief description of the drawings]

FIG. 1 is a perspective view of a resin mold according to an embodiment of the present invention.

FIG. 2 is a cross-sectional perspective view of a protruding resin mold according to the embodiment of the present invention.

FIG. 3 is a sectional perspective view of an internal hollow resin mold according to another embodiment of the present invention.

FIG. 4 is a cross-sectional view of a multilayer bendable resin mold according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a resin sheet-bonded resin mold according to another embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a main part of a co-injection injection molding machine according to an embodiment of the present invention.

FIG. 7 is a vertical sectional view of a multilayer blow molding machine according to an embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a main part of a multilayer blow molding machine according to an embodiment of the present invention.

FIG. 9 is a vertical sectional view of a bonding blow molding machine according to an embodiment of the present invention.

FIG. 10 is a perspective view of a conventional resin mold.

FIG. 11 is a sectional side view of a conventional resin mold.

[Explanation of symbols]

 20 Resin Formwork 20A Placing Surface 20B Backup Surface 20C Side Surface 20a Through Hole 30 Resin Formwork 30A Placing Surface 30B Backup Surface 30C Hollow Part 30P Protruding Resin Formwork 30Q Internal Hollow Resin Formwork 30R Multilayer Bending Resin Formwork 30S Resin sheet bonding type resin mold 32 Convex part 34 Concave part 36 Side frame 40 Surface layer material 42 Core material 44 Backside material 50 Co-injection injection molding machine 50A First injection unit 50B Second injection unit 50C Third injection Unit 50D Fixed mold 50E Movable mold 51 Nozzle 52 Resin passage 53 Nozzle 54 Resin passage 55 Cavity 56 Mold resin passage 60 Multilayer blow molding machine 61 Die 62A First extruder 62B Second extruder 62C Third extruder 70 Laminating blow molding machine 72 Dice head 78 Mold 0 roll 82 roll stand 90 cutter 90a air cylinder 90b cutter seat P parison S resin sheet

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location B29L 31:00

Claims (5)

[Claims] 1. A resin mold made of a laminated material for concrete pouring, wherein the pouring surface is formed by a smooth flat surface, and the backup surface behind the pouring surface is a mold in which convex portions and concave portions are alternately formed. While being formed in a flat plate shape that extends in the longitudinal direction of the frame and has a cross section that projects orthogonally to the casting surface, or is formed into a substantially corrugated shape with a hollow portion inside, A resin mold made of a laminated material in which at least the surface layer on the side of the driving surface is made of a resin material having excellent surface properties, and at least the inside of the backup surface is made of a reinforcing material filled with excellent rigidity. 2. The resin mold made of a laminated material according to claim 1, wherein the resin material of the surface layer is a polypropylene resin, and the resin material inside is a reinforced polypropylene resin material. 3. The resin mold made of the laminated material according to claim 1 or 2, which is molded by co-injection injection molding. 4. The resin mold made of the laminated material according to claim 1 or 2, which is molded by multi-layer blow molding. 5. The laminate according to claim 1 or 2, wherein the resin material for the surface layer is a resin sheet, and the resin sheet is laminated on a mold and laminated by blow molding or injection molding. Resin formwork made of material.