JPH06246753A - Manufacture of false tree - Google Patents

Abstract

PURPOSE:To obtain a false tree made of synthetic resin and having an appearance similar to that of a natural tree and a high strength. CONSTITUTION:A cylindrical false tree mold 1 is circumferentially divided into three segments, and movable molds 2, 3 are opposed to both side ends of the mold 1. A core holding protrusion 21 of the mold 2 is inserted into one end of a false tree core 4, and a cap holding protrusion 31 of the mold 3 is inserted into a central through-hole of an annual ring 5 covering the other end. The core 4 and the cap 5 are held between the molds 2 and 3 in the mold 1, molten resin 6 is cast in the mold 1, cooled to be cured and then released from the mold.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a synthetic resin pseudo tree containing a reinforcing core used for a pseudo tree fence or the like.

[0002]

2. Description of the Related Art Heretofore, as a method for manufacturing a pseudo tree, for example, a method disclosed in Japanese Patent Laid-Open No. 4-308709 has been known. In this gazette, an annual wheel having an annual ring pattern is abutted and temporarily attached to one side of a cylindrical pseudo-wooden die that can be divided into an upper die and a lower die, and a molten resin is placed in the pseudo-wooden die. A method for producing a pseudo-tree that is poured, demolded after cooling, is described.

[0003]

However, in the conventional method for producing a pseudo-tree, since the pseudo-wood die is divided into two parts, only a pseudo-tree having a skin texture that is easy to remove is obtained.
There is a problem that it is hard to get a texture close to natural wood.
Further, since the annual wheel is simply provided in the pseudo wood mold and the molten resin is injected, there is a problem that only a pseudo wood made of a synthetic resin alone and having a weak strength can be obtained.

It is an object of the present invention to provide a method for producing a pseudo tree that solves the above-mentioned conventional problems.

[0005]

In order to solve the above-mentioned problems, the present invention makes it possible to form a wood-skin shape that is closer to natural wood by dividing the pseudo-wooden mold into three parts, and holds the pseudo-wooden core material and the annual ring cap. The movable type is provided so that a pseudo-wood containing a reinforcing core can be formed.

That is, in the method for producing a pseudo-wood according to the present invention, a cylindrical pseudo-wood die is divided into three in the circumferential direction, and a movable die capable of reciprocating in the length direction of the die is relatively located at both end portions of the pseudo-wood die. Directed,
One of the movable dies has a convex core-holding portion, and the other movable die has a cap-retaining projection that is opposed to each other. Then, insert the leg protruding from the synthetic resin annual ring cap on the other end to cover the annual ring cap, and insert the movable cap holding projection into the through hole in the center of the annual ring cap. The artificial wood core material and the annual ring cap are held between the movable molds inside, the molten resin is injected into the artificial wood mold, and the mold is removed after cooling and curing.

[0007]

A high-strength pseudo-wood is obtained which has a coating resin layer on the outer periphery of the core material, and the coating resin layer and the annual ring cap are fused and integrated. Further, since the pseudo-wooden mold is divided into three parts, the surface of the coating resin layer can be made to have a skin texture closer to natural wood.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. In the drawing, 1 is a cylindrical pseudo-wooden mold,
It is divided into three in the circumferential direction. As shown in FIG. 2, for example, this pseudo-wooden die 1 is formed by three divided dies, a lower die 11, an upper left die 12, and an upper right die 13, and the inner surface of each die has a texture pattern transferred from natural wood. It is provided. In addition, 14 is a resin injection port for injecting a molten resin into the pseudo wood mold 1.

Reference numerals 2 and 3 are movable types, which are provided at opposite end portions of the pseudo-wooden die 1 so as to face each other and close both side openings of the pseudo-wooden die 1. Mobile type 2,
3 are adapted to be capable of reciprocating by a predetermined distance in the length direction of the pseudo wood mold 1 as indicated by arrows in FIG. This reciprocating motion is applied to the movable molds 2 and 3, for example, an air cylinder,
It suffices that a hydraulic cylinder or the like be connected and operated.

On the surface of one movable die 2 facing the other movable die 3, a core material holding convex portion 21 is provided in a protruding manner. The core material holding convex portion 21 has a size such that it can be fitted into the hollow end portion of the pseudo wooden core material 4. Further, as shown in FIG. 1, the movable die 2 is provided with a taper portion 22 on the outer peripheral portion of the die body, and the die body is moved so as to enter into the resin molding portion in the pseudo-wood die 1 at the time of pseudo-wood molding. There is.

The convex portion 21 for holding the core member of the other movable die 3
A cap holding projection 31 is provided on the surface facing the. The movable die 3 is configured so that the cap-holding projections 31 are moved so as to project into the resin molding portion in the pseudo-wood die 1 during pseudo-wood molding. 4 is a pseudo-wood core material, which is for reinforcing the pseudo-wood, and a metal pipe such as a steel pipe is generally used.
Hollow elongated bodies such as synthetic resin pipes and fiber reinforced resin pipes may be used.

Reference numeral 5 denotes an annual ring cap, which is made of a synthetic resin and has a surface with an annual ring pattern and coloring similar to natural wood. The annual ring cap 5 has a through hole 51 formed substantially in the center thereof, and a cylindrical leg portion 52 that can be fitted into the hollow end of the pseudo-wood core material 4 is provided in the substantially central portion on the back surface side. Further, when the collar portion 53 of the annual ring cap 5 is provided with a flange portion 53 that spreads outward as shown in FIG. 4, the collar portion 53 prevents the annual ring cap 5 from coming off during pseudo-wood molding, and the annual ring cap 5 is covered with a coating resin layer 61 described later.
Is preferable because it can be firmly integrated. In addition, 54 is a locking portion projectingly provided on the peripheral portion of the rear surface side through hole 51 of the annual ring cap 5, and is used for locking the cap plug 8 that closes the through hole 51.

Reference numeral 6 denotes a molten resin, which forms the coating resin layer 61 of the pseudo wooden core material 4. As the molten resin 6, a thermoplastic resin such as polyethylene, polyvinyl chloride, polystyrene, polypropylene is generally used.

Next, the manufacturing method of the present invention will be described.
First, in a state where the pseudo-wooden die 1 is divided, the protrusion 21 for holding the core material of one movable die 2 is inserted into one end of the pseudo-wooden core material 4, and the transparent ring of the annual ring cap 5 covered on the other end of the pseudo-wooden core material 4 is inserted. The cap holding projection 31 of the other movable die 3 is inserted into the hole 51, and the pseudo wooden core material 4 and the annual ring cap 5 are held between the movable dies 2 and 3. Next, the pseudo wood mold 1 is synthesized, the molten resin 6 is injected into the pseudo wood mold 1 from the resin injection port 14, and the mold is removed after cooling and curing.

The annual ring cap 5 is fused and integrated with the molten resin 6 molded in the pseudo wood mold 1. The annual ring cap 5 is made of a resin of the same type as the molten resin 6 and having a higher melting point. Then, in the artificial wood mold 1, the annual ring cap 5
Is preferable because it does not melt and lose its shape.

As shown in FIG. 3, the pseudo-wooden die 1 and the movable die 2 project the end portion of the pseudo-wooden core material 4 so that the coating resin layer 61 projects in the lengthwise direction of the pseudo-wooden core material 4. Formed,
It is preferable to form the concave portion 7 at the end of the pseudo-wood because the internal stress due to molding shrinkage or thermal expansion between the pseudo-wood core material 4 and the coating resin layer 61 can be relaxed and the distortion can be suppressed.

When using the artificial wood molded as described above, the synthetic resin cap plug 8 may be fitted into the through hole 51 of the annual ring cap 5 to close the through hole 51 as shown in FIG. At this time, the cap plug 8 is prevented from coming off by the locking piece 81 provided at the tip thereof being locked by the locking portion 54 of the annual ring cap 5.

When the artificial wood is used as a fence post, a mold for forming a concave hole is added to the artificial wood mold 1 in order to form a concave hole for inserting and connecting the end of the horizontal wood on the side surface of the artificial wood. The recessed holes may be formed simultaneously with the pseudo-wood forming.

[0019]

As described above in detail, in the method for producing a pseudo-wood according to the present invention, since the cylindrical pseudo-wood die is divided into three in the circumferential direction, the mold can be easily demolded and demolded as in the conventional case. It is possible to obtain a pseudo tree having a skin texture that is closer to that of a natural tree, rather than having an easy texture. In addition, since the movable molds are opposed to each other at both ends of the pseudo-wooden mold, the pseudo-wooden core material and the annual ring cap are held between the movable molds in the pseudo-wooden mold, and the molten resin is injected into the pseudo-wooden mold. It is possible to obtain a high-strength synthetic resin artificial wood reinforced by.

Further, a movable type core material holding convex portion is inserted into one end of the pseudo-wood core material, and a movable type cap holding projection is inserted into a substantially central through hole of an annual ring cap covered with the other end and moved. Since the pseudo-wood core material and the annual ring cap are held between the molds, the ends of the pseudo-wood core material that are the ends of the molded pseudo-wood and the through-holes of the annual ring cap can be used to facilitate centering during secondary processing. .

[Brief description of drawings]

FIG. 1 is a partially cutaway sectional view at the time of molding, showing an embodiment of the manufacturing method of the present invention.

FIG. 2 is a side view showing a pseudo wood die according to the present invention.

FIG. 3 is a cross-sectional view showing one end of a pseudo tree molded according to the present invention.

FIG. 4 is a cross-sectional view showing the other end of the pseudo tree molded according to the present invention when in use.

[Explanation of symbols]

 1 Pseudo wood mold 11 Lower mold 12 Upper left mold 13 Upper right mold 14 Resin injection port 2, 3 Moving mold 21 Core material holding convex portion 31 Cap holding projection 4 Pseudo wooden core material 5 Annual ring cap 51 Leg portion 52 Through hole 6 Molten resin 61 Coated resin layer

Claims (1)

[Claims] 1. A cylindrical pseudo-wood die is divided into three in the circumferential direction,
The movable molds that can reciprocate in the length direction of the mold are opposed to each other on both ends of the pseudo-wooden mold.One movable mold has a protrusion for holding a core material, and the other movable mold has a protrusion for holding a cap. The movable wooden core holding convex part is inserted at one end of the artificial wooden core material, and the leg part protruding from the synthetic resin annual ring cap is inserted at the other end to attach the annual ring cap. In addition to covering, insert a movable cap holding projection into the through hole of the center of the annual ring cap, hold the pseudo wood core material and annual ring cap between the movable molds in the pseudo wood mold, and place the molten resin in the pseudo wood mold. A method for producing a pseudo-tree in which it is injected, cooled and cured, and then demolded.