JP3286060B2 - Manufacturing method of inorganic bamboo - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing an inorganic artificial bamboo used for a fence of a park or a sidewalk, a telephone pole or the like.

[0002]

2. Description of the Related Art In general, artificial trees and bamboo bamboos are known in which a coating layer of an inorganic material such as cement is provided on the outer peripheral surface of a rod-shaped body such as a steel pipe or the like, and a pattern such as unevenness is formed on the surface of the coating layer. I have. Conventionally, as a method of manufacturing this artificial wood or artificial bamboo, the rod-shaped body is inserted into a mold having an appropriately patterned inner surface, and an inorganic material such as cement is poured into the mold to form an outer peripheral surface of the rod. There is known a method for forming a coating layer of an inorganic material. In addition, a method is also known in which an inorganic material is sprayed on the outer peripheral surface of the rod-shaped body by spraying or the like to cover the rod-shaped body, and then an uneven pattern or the like is formed on the coating layer by hand processing.

[0003]

However, in the former manufacturing method, the rod-like body is inserted into the mold, and an inorganic material such as cement is poured into the mold to cover the outer peripheral surface of the rod-like body. There is a problem that it is troublesome and that only one piece can be manufactured, so that continuous production is difficult. In addition, since the inorganic material cannot be removed from the mold until it cures and solidifies, it takes a long time to manufacture, resulting in poor manufacturing efficiency and high cost.

In the latter manufacturing method, since an inorganic material is sprayed onto the outer peripheral surface of the rod-shaped body by spraying or the like, a coating layer having a uniform thickness cannot be obtained, and the inorganic material scatters around the work. There are environmentally unfavorable problems. In addition, since the uneven pattern or the like is formed on the coating layer by manual processing, it is troublesome, requires skill, and has a problem of low production efficiency.

An object of the present invention is to provide a method for producing an inorganic artificial bamboo which has solved the conventional problems.

[0006]

In order to solve the above-mentioned problems, the present invention provides a rod-shaped body coated with an inorganic material such as cement by extrusion molding, and a bamboo knot pattern is formed on the coating layer in the extrusion coating process. It is. That is, in the method for producing an inorganic pseudo-bamboo of the present invention, a cross head die of an extruder has a rod-shaped body having a predetermined length and a part having a slippery sliding portion on an outer peripheral surface thereof.
Introduced continuously between the moving rolls , extruded with an inorganic material such as cement on the outer peripheral surface of the rod-shaped body, and stopped intermittently when the rod-shaped body passing through the crosshead die was sandwiched by the sliding portion. Then, at the exit of the crosshead die, the coating layer of the inorganic material on the outer peripheral surface of the rod is intermittently swelled to form a bamboo knot pattern on the coating layer, and then the coating layer is cured and solidified.

[0007]

A rod-shaped body having a predetermined length is continuously introduced into a crosshead die of an extruder, and an inorganic material such as cement is extrusion-coated on the outer peripheral surface of the rod-shaped body. . Also, by intermittently stopping the rod-shaped body passing through the crosshead die, the inorganic material at the crosshead die outlet intermittently stagnates, and the coating layer of the inorganic material on the outer peripheral surface of the rod-shaped body intermittently expands. An annular protrusion is formed to form a bamboo knot pattern. Therefore, a pattern can be formed on the coating layer without any trouble or skill.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a manufacturing process diagram showing an embodiment of the manufacturing method of the present invention, FIG. 2 is a side view showing another example of a feeder in the manufacturing method of the present invention, and FIG. 3 is an inorganic dummy manufactured by the manufacturing method of the present invention. It is a side view which shows the example of a bamboo.

In FIG. 1, reference numeral 1 denotes a rod-shaped body made of metal, synthetic resin, wood, or the like, and has a cross-sectional shape appropriately formed such as a circle, an ellipse, a square, and a polygon.
The rod-shaped body 1 may be hollow or solid. Generally, a steel pipe is preferably used as the rod-shaped body 1.

Reference numeral 2 denotes an extruder used for an inorganic material. The extruder 2 is configured such that an inorganic material such as cement supplied from a hopper 21 is kneaded and extruded from a crosshead die 22.
By continuously introducing the rod-shaped body 1 into the rod 2, a coating layer 11 of an inorganic material is formed on the outer peripheral surface of the rod-shaped body 1.

[0011] The above inorganic materials usually contain water and a polymer for cement admixture added to the main component cement, and if necessary, aggregates and fillers such as silica sand, glass flakes, reinforcing fibers, calcium carbonate and the like. What was done is used.
In addition to the above, other inorganic materials that can be formed by extrusion, such as mortar and ceramic, may be used.

Reference numeral 3 denotes a feeder, in which a plurality of drive rolls 31 forming a pair are arranged side by side, and the rod 1 is sandwiched between the drive rolls 31 so that the rod 1 is cross-head die 2 of the extruder 2.
2 is introduced. Drive roll 31
Has a slippery portion 32 on a part of the outer peripheral surface, and when the bar 1 is sandwiched by the slide 32, the feed of the bar 1 is temporarily stopped. That is, the feeding device 3 intermittently stops the rod-shaped body 1 and introduces the rod-shaped body 1 into the crosshead die 22.

Further, the feeding device 3 is not limited to the above-mentioned one,
For example, as shown in FIG. 2, a plurality of normal pairs of drive rolls 33 may be arranged side by side, and a gripping device 34 for intermittently pressing the rod-shaped body 1 may be arranged. In this case, the gripping device 34 repeats the operation of temporarily holding the rod-shaped body 1 and then opening the rod-shaped body 1 to intermittently stop the rod-shaped body 1. Further, the feed device 3 may be configured such that the driving rolls forming a pair are intermittently driven to stop.

In FIG. 1, reference numeral 4 denotes a feed-side conveyor, and reference numeral 5 denotes a take-up side conveyor.

Next, the production method of the present invention will be described in sequence. First, an inorganic material such as cement kneaded by a mixer or the like is supplied to a hopper 21 of the extruder 2, and the inorganic material is mixed by a screw in the extruder 2. The pressure is fed to the crosshead die 22. On the other hand, the rod-shaped body 1 is supplied onto the feed-side conveyor 4.

Next, a connecting joint is inserted between the ends of the rods 1 supplied on the conveyor 4 to connect the rods 1 in a continuous manner.
Transfer to The rod 1 is continuously inserted into the crosshead die 22 of the extruder 2 with the driving roll 31 of the feeding device 3 sandwiching the rod-shaped body 1.

At this time, when the bar 1 is sandwiched between the sliding portions 32 of the drive roll 31, the feeding of the bar 1 is temporarily stopped. Then, at the outlet of the crosshead die 22, the extruded inorganic material stagnates, and the coating layer 11 of the inorganic material on the outer peripheral surface of the rod-shaped body 1 swells. When the rod 1 is intermittently stopped in this manner, the coating layer 11 is stopped.
The annular protrusion 12 whose surface bulges is formed intermittently, and a knot pattern of bamboo is formed. Note that the size and the forming interval of the annular protrusion 12 may be appropriately adjusted according to the time and the stop interval for stopping the feeding of the rod-shaped body 1.

Next, the extruded and coated rod 1 is placed on the take-up side conveyor 5 and transported, and then transported to another place to cure and solidify the coating layer 11. In addition, the pickup conveyor 5
Inserting the pedestal 6 between the vicinity of the connecting portion of the continuous rod-shaped body 1 and the conveyor 5 so that the coating layer 11 does not come into contact with the conveyor 5 and the annular protrusion 12 is not crushed when being transferred on the upper side. It is preferable to keep it.

Next, an example of manufacturing according to the manufacturing process shown in FIG. 1 will be described. 100 parts by weight of cement, 200 parts by weight of silica sand, polymer 20 for cement admixture as an inorganic material
Using a mixture consisting of 50 parts by weight of water and 50 parts by weight of water, using a steel pipe having an outer diameter of 42.7 mm and a length of 3 m as a rod, and continuously extruding the steel pipe at a feed device speed of 2 m / min. Introduced into the crosshead die. At this time, by stopping the steel pipe intermittently, the thickness 5 mm is formed on the outer peripheral surface of the steel pipe.
A pseudo-bamboo as shown in FIG. 3 was obtained in which annular protrusions were formed at intervals of 30 cm on a coating layer of mm.

[0020]

As described in detail above, the method for producing an inorganic pseudo-bamboo according to the present invention is characterized in that a rod is continuously introduced into a crosshead die of an extruder, and an inorganic material such as cement is placed on the outer peripheral surface of the rod. Extrusion coating, intermittently stopping the rod-shaped body passing through the crosshead die, forming a bamboo node pattern on the coating layer on the outer peripheral surface of the rod-shaped body, and then curing and solidifying, so that a uniform one is continuously efficient. Can be manufactured well. In addition, it is easy to mass-produce bamboo knots without the need for labor and skill, and the cost can be reduced as compared with the conventional art.

[Brief description of the drawings]

FIG. 1 is a manufacturing process diagram showing one embodiment of the manufacturing method of the present invention.

FIG. 2 is a side view showing another example of the feeding device in the manufacturing method of the present invention.

FIG. 3 is a side view showing an example of an inorganic artificial bamboo produced by the production method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rod-shaped body 11 Coating layer 12 Annular protrusion 2 Extruder 22 Crosshead die 3 Feeder 31 Drive roll 32 Sliding part

Claims (1)

(57) [Claims] 1. A drive having a rod portion having a predetermined length on a crosshead die of an extruder and having a slippery portion on a part of an outer peripheral surface thereof.
Introduced continuously between the rolls , extruded with an inorganic material such as cement on the outer peripheral surface of the rod-shaped body, and stopped intermittently when the rod-shaped body passing through the crosshead die was sandwiched by the sliding portion. At the crosshead die outlet, the inorganic pseudo-bamboo is produced by intermittently swelling the coating layer of the inorganic material on the outer peripheral surface of the rod to form a bamboo node pattern in the coating layer and then curing and solidifying the coating layer. Method.