KR101582417B1

KR101582417B1 - Plastic block toys and its manufacturing method

Info

Publication number: KR101582417B1
Application number: KR1020140089725A
Authority: KR
Inventors: 김민숙
Original assignee: 김민숙
Priority date: 2014-07-16
Filing date: 2014-07-16
Publication date: 2016-01-06

Abstract

The present invention relates to a manufacturing method of a plastic block toy, which comprises the steps of: extruding parison which is a molten resin; sealing a pair of outer molds; cutting the parison on the outside of the outer molds; spraying high-pressure air in the parison inside the pair of sealed outer molds; sealing a pair of inner molds equipped inside the pair of outer molds; and removing burr by picking the plastic block toy completed by opening the pair of outer molds and the pair of inner molds. According to the present invention, the toy can be used in water, and is easy to be washed and stored by being sealed and manufactured to be used in water.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to plastic block toys,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic block toy and a method of manufacturing the plastic block toy. More particularly, the present invention relates to a plastic block toy manufactured by being hermetically sealed for use in water, .

Plastic block toys are baby toys, made of plastic, made of plastic toys that are used in play by making a desired shape by mutual fitting.

Such plastic block toys are generally formed by a blow molding method or an injection molding method.

FIG. 1 shows a plastic block toy made by a conventional twisting method. As shown in FIG. 1, a hole for introducing air, which is essentially required due to the characteristics of a blow molding method, is formed at one side, There is a problem in that dust and other impurities are contained when the water is contained in the hole due to difficulty in washing and drying.

FIG. 2 shows a plastic block toy made by a conventional injection molding method. As shown in FIG. 2, grooves are formed to make it difficult to clean and dry. When water is present, do.

Patent Document 1: JP-A-2001-0060178

The present invention provides a plastic block toy and a method of manufacturing the plastic block toy which can be used in water and can be used in water as well as being easily washed and stored.

The present invention relates to a method of manufacturing a plastic block toy, comprising: extruding a parison as a molten resin; Closing a pair of outer molds; Cutting the parison outside the outer mold; Spraying high pressure air into the parison inside the enclosed outer molds; Closing a pair of inner molds provided in the pair of outer molds; And removing the burr by opening the pair of outer molds and the pair of inner molds to take out the finished plastic block toys.

The pair of outer molds may be provided with a gas inflow path through which high-pressure air flows.

A cavity corresponding to the shape of the plastic block toy may be formed on the pair of inner molds.

The pair of inner molds may be installed inside the pair of outer molds so as to be movable forward and backward by a cylinder.

In addition, the present invention provides a plastic block toy produced by sealing air holes by a method of manufacturing a plastic block toy.

According to the present invention, since it is manufactured so as to be usable in water, it can be used in water, and can be easily washed and stored.

1 is a view showing a plastic block toy made by a conventional twisting method.
2 is a view showing a plastic block toy made by a conventional injection molding method.
3A to 3E are views schematically showing a process of manufacturing a block toy by a hollow molding method according to an embodiment of the present invention.
4 is a view schematically showing a process of manufacturing a block toy by an injection molding method according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.

3A to 3E are views schematically showing a process of manufacturing a block toy by a blow molding method according to an embodiment of the present invention.

As shown in FIG. 3A, a pair of outer molds 20 facing each other are disposed at the lower portion of an extruder 10 for extruding a parison, which is a molten plastic, into a cylindrical shape, A pair of inner molds 30 which are arranged to be movable forward and backward by the cylinder 40 are provided.

The pair of inner molds 30 are arranged to face each other and have a cavity corresponding to the outer shape of the plastic block toy. The upper mold 20 is provided with a gas inflow path 21 formed when the outer mold 20 is sealed and the gas inflow path 21 is provided with a high pressure gas injection part 60 The high-pressure gas can be introduced from the high-pressure side.

As shown in FIG. 3B, the parison, which is a molten resin, is extruded through the extruder 10 until it comes down to the lower part of the outer mold 20 in the form of a circular tube.

Next, as shown in Fig. 3C, the parison outside the outer mold 20 is cut through the cutter 50 that enters and leaves the outer mold 20 in a closed state, and as shown in Fig. 3D, So that the high-pressure air injector 60, which can be raised and lowered, is lowered to continuously blow high-pressure air. Thus, the parison is inflated like a balloon in the outer mold 20.

3E, when the cylinder 40 is operated to close the inner mold 30, the parison, which has been swollen like a balloon, is molded into a plastic block toy shape by the cavity of the inner mold 30. The air holes formed by the gas inflow path 21 are present outside the molded plastic block toy by molding the parison, which has been inflated like a balloon, into a plastic block toy shape by using the inner mold 30, Accordingly, when the outer mold 20 and the inner mold 30 are opened and the molded plastic block toy is taken out and the burr is assembled, as shown in FIG. 3F, there is no air hole in the finished plastic block toy .

Therefore, when the plastic block toy is formed by the hollow molding method as described above, it is possible to prevent formation of air holes, so that it can be used not only in water but also in drying and washing.

Alternatively, the following blow molding method may be performed for sealing the air holes.

First, after the parison is extruded, the high-pressure air is injected into the mold having the cavity corresponding to the shape of the plastic block toy, the air holes are sealed with the same molten resin as the parison, and then heat is applied to the joint surface using the heat plate It can be sealed.

In addition, after the plastic block toy is selectively produced through the blow molding method, a separate stopper can be manufactured to seal the air hole. At this time, an adhesion method using an ultrasonic wave can be used.

Alternatively, the air holes may be sealed by bolts, and protrusions enough to block the air holes may be integrally formed and assembled to seal the block toys.

4 is a view schematically showing a process of manufacturing a block toy according to another embodiment of the present invention. As shown in the figure, the front and back surfaces of the plastic block toy may be respectively produced through a general injection molding process, and then the product may be formed by applying ultrasonic waves or heat.

Optionally, the front and back sides of the block toy may be produced through a common injection process, then the front and back sides may be combined and tightened with bolts to seal each other.

Furthermore, male and female concave and convex portions may be formed on the front and rear sides, which are separately manufactured, to seal the front and rear sides, or to form a rail groove and to be coupled with each other in a sliding manner. Furthermore, one side of the block toy may be produced smaller than the opposite side and sealed.

It is also possible to produce the front side or the back side of the block through the primary injection and then to produce the rear side or the front side through the secondary injection to seal the product.

Furthermore, it is also possible to produce the front and back sides of the block toy through a general injection method, and then to inject the second injection with a soft material to seal it.

Although the above-described modified embodiments are not described in detail, those skilled in the art will be able to attain them within the ordinary knowledge.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Accordingly, such modifications or variations are intended to fall within the scope of the appended claims.

10: extruder 20: outer mold
30: inner mold 40: cylinder
50: cutter 60: high pressure air jetting section

Claims

A method of manufacturing a plastic block toy,
Extruding a parison as a molten resin;
Closing a pair of outer molds;
Cutting the parison outside the outer mold;
Spraying high pressure air into the parison inside the enclosed outer molds;
Closing a pair of inner molds provided in the pair of outer molds; And
And removing the burr by opening the pair of outer molds and the pair of inner molds to take out the finished plastic block toys.

The method according to claim 1,
Wherein the pair of outer molds are provided with a gas inflow path through which high-pressure air flows.

The method according to claim 1,
Wherein a cavity corresponding to a shape of the plastic block toy is formed on the pair of inner molds.

3. The method of claim 2,
Wherein the pair of inner molds are installed inside the pair of outer molds so as to be movable forward and backward by a cylinder.

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