KR20030066248A - Manufacturing method of the manifold having the heater for injecting mold - Google Patents

Abstract

PURPOSE: A method for manufacturing a manifold with a built-in heater is provided to easily insert the heater into the inside of the manifold by having a wire on the upper part of the heater. CONSTITUTION: In a manifold(10) with a built-in heater, a heater inserted groove is formed in the manifold. A wire extension groove is formed at the sides of the heater inserted groove. A heater(20) is inserted into the heater inserted groove. A wire(30) is inserted into the wire extension groove and the heater inserted groove.

Description

Manufacturing method of the manifold having the heater for injecting mold

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manifold used in manufacturing an injection mold, and more particularly, to a manifold having a heater built therein and a method of manufacturing the same.

Synthetic resin products are manufactured by molding molten resin at an appropriate temperature into a mold cavity of a product shape at an appropriate pressure and speed, and then cooling and solidifying the filled resin over a predetermined time to produce a molded article. Here, in the injection molding, the resin flows to the mold cavity, that is, the runner so that the resin always melts in an appropriate manner. A manifold is provided to inject the synthetic resin raw material therein.

In the process of moving the synthetic resin to the cavity according to the above-described process, a heater is provided inside the manifold so that the synthetic resin raw material in the molten state does not harden.

FIG. 1 is an exploded perspective view showing the configuration of a manifold in which a heater is built according to the prior art, and includes a heater in an insertion groove 2 provided in each of the upper and lower surfaces 1 ′ and 1 ″ of the manifold 1. It is shown that 3) was embedded and the copper (copper) cover 4 provided with the support groove 5 in its inside was press-fitted in the insertion groove 2.

The conventional heater-embedded manifold as described above inserts the copper cover 4 cast in the same shape as the insertion groove 2 on the upper and lower surfaces 1 'and 1 "of the manifold 1, respectively. Since it fits into the groove 2 by a press-fit method, it is difficult to insert it correctly in the case of an error of the shape of the insertion groove 2 and the copper cover 4. In addition, the manifold 1 and the conventionally made of different materials and Due to the different thermal expansion coefficients of the copper cover 4, not only the corrosion of the copper cover 4 occurs when it is maintained at a high temperature for a long time, but also a gap is generated between the manifold 1 and the copper cover 4. In some cases, the copper cover 4 often comes out of the manifold, and in extreme cases, the copper cover 4 protrudes to the lower heater 3, which causes disconnection. It is necessary, and there is a problem that the manufacturing cost accordingly increases.

The present invention is to solve the above problems, the heater is provided in the upper portion of the heater in the heater expansion groove of the manifold can be easily inserted into the heater in the manifold, the separation and separation of the heater from the manifold is not easy It is an object of the present invention to provide a heater embedded manifold and a method of manufacturing the same.

1 is an exploded perspective view showing a configuration of a manifold in which a heater is built according to the prior art;

Figure 2a is a perspective view showing the heater insertion groove and expansion groove structure of the manifold according to the present invention,

Figure 2b is a cross-sectional view showing a state in which the heater and the wire in the insertion groove and the expansion groove as shown in Figure 2a,

FIG. 2C is a cross-sectional view showing a state in which the upper part of the manifold is pressed in the state of the wires aligned as shown in FIG. 2B

<Description of the code | symbol about the principal part of drawing>

1: manifold

1 ': Manifold Top

1 ": When manifold

2: insertion groove

3: heater

4: copper cover

5: support groove

10: manifold

11: Insertion groove

12: Expansion groove

20: heater

30: wire

40: upper part of the wire

The present invention for achieving the above object, in the manifold having a heater therein for the injection mold, the manifold; A heater insertion groove formed in the manifold; A heater expansion groove formed in the manifold of the heater insertion groove side; A heater inserted into the heater insertion groove; And a wire inserted into the heater insertion groove and the heater expansion groove.

In addition, the present invention for achieving the above object, in the manifold manufacturing method having a heater therein for the injection mold, the first step of forming a heater insertion groove and expansion groove in the manifold; Inserting a heater into the heater insertion groove; And arranging a wire on the heater expansion groove into which the heater is inserted. A fourth step of pressing the wires aligned on the heater extension grooves; And a fifth step of repeating the third step and the fourth step at least once to insert the wire into the heater expansion groove and press the upper part of the manifold.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 2a is a perspective view showing the heater insertion groove and the expansion groove structure of the manifold according to the present invention, the manifold 10, the heater insertion groove 11 formed in the manifold 10, the heater insertion groove 11 side The heater expansion groove 12 formed inside the manifold 10 is shown. In the preferred embodiment of the present invention, the heater insertion groove 11 and the heater expansion groove 12 form together.

FIG. 2B is a cross-sectional view illustrating a state in which the heater 20 and the wire 30 are arranged in the heater insertion groove 11 as shown in FIG. 2A, wherein the wire 30 is made of the same material or a different material as the manifold. Is made of.

FIG. 2C is a cross-sectional view showing the wire 30 being inserted into the heater insertion groove 11 and the expansion groove 12 by the method of pressing the aligned wires. In FIG. 2C, the manifold of the upper portion of the wire 40 is pressed. It is shown that the wire is inserted and expanded into the expansion groove (12).

As described above, the wire 30 is bent and aligned according to the shape of the heater insertion groove 11 in the manifold 10, and the process of repeatedly pressing in the manifold of the upper portion of the wire 40 is repeatedly performed. Insert the wire 30 into the whole.

The present invention made as described above aligns the wires according to the heater insertion grooves and expansion groove shapes of the manifold, and presses the manifold of the upper portion of the wires to insert the wires in the heater insertion grooves and the expansion grooves, thereby The heater can be inserted easily.

In addition, since the wire is provided in the heater insertion groove, the heater is not easily separated and detached from the manifold, thereby increasing the life of the manifold.

Claims (5)

In a manifold having a heater therein for an injection mold, Manifolds; A heater insertion groove formed in the manifold; A wire extension groove formed in the manifold of the heater insertion groove side; A heater inserted into the heater insertion groove; And Manifold comprising a wire in the heater insertion groove and the expansion groove. The method of claim 1, Manifold, characterized in that for inserting a wire shape into the expansion groove. In the manufacturing method of the manifold having a heater therein for the injection mold, A first step of forming a heater insertion groove in the manifold; Inserting a heater into the heater insertion groove; A third step of aligning wires on the heater insertion grooves and the expansion grooves into which the heater is inserted; A fourth step of pressing the wires aligned on the heater extension grooves; And And repeating the third step and the fourth step at least once, inserting the wire into the heater expansion groove, and then pressing the upper part of the manifold to provide a manifold manufacturing method. The method of claim 3, wherein The heater insertion groove, And a wire extension groove formed in the manifold on the side of the heater insertion groove. The method of claim 4, wherein Manifold manufacturing method according to claim 4, wherein the manifold is pressed in directly above the wire extension groove.