KR20180079527A - Core for hollow type knuckle making - Google Patents

Abstract

The present invention provides a core for manufacturing a hollow knuckle. The core is arranged inside the hollow knuckle when manufacturing a hollow knuckle manufactured by a hollow knuckle mold composed of an upper mold and a lower mold. The hollow knuckle includes a first unit hollow knuckle and a second unit hollow knuckle coming in contact with and coupled to each other. The core includes a first protrusion protruding from one end and fixing a position of the core inside the hollow knuckle mold, and a second protrusion protruding from both sides of the core to a portion where the upper mold and the lower mold contact each other. According to the present invention, a position of a core for manufacturing a hollow knuckle is easily maintained inside a mold during synthesizing of a hollow knuckle mold by projecting protrusions on each of one end part and both sides of the core.

Description

Core for hollow knuckle making [

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow knuckle core, and more particularly, to a hollow knuckle core in which the position of a core is easily maintained in a mold for manufacturing a hollow knuckle during manufacture of a hollow knuckle.

In automobiles, knuckles play a role in power transmission, steering and braking, and vehicle load bearing.

The knuckle must have sufficient rigidity to cope with various directions of force due to the operation of various related parts. Since the knuckle has a complicated shape in order to mount various parts, the casting is made by pouring the molten material into the mold, .

Casting is a method of injecting a molten metal material into a cavity or a mold having a desired shape at the time of solidification, and it is advantageous that a simple or complicated shape can be formed by only one step.

In recent years, the problem of environmental pollution caused by vehicles has become an issue as well as a demand for improvement in fuel efficiency of vehicles. Therefore, the vehicle is seeking to be light in weight and the parts constituting the vehicle are also required to be light in weight.

As part of a method for reducing the weight of vehicle parts, manufacturing of vehicle parts by hollow casting is being carried out.

In the hollow casting, the core is inserted into the mold to form the hollow portion of the finished product.

The core is used to make a hollow product. The core must have sufficient mechanical strength to maintain its shape against the heat and pressure of the molten metal during casting, but must be relatively easily broken so that it can be easily removed from the casting after casting. Sand, thermosetting resins (such as foam) and salt are commonly used as materials for such cores.

1 is a perspective view showing an example of the construction of a core for manufacturing a hollow knuckle according to a conventional technique.

Referring to FIG. 1, it can be seen that the core 2 used for manufacturing the hollow knuckle 11 is manufactured in a predetermined shape and two core seating projections 3 protrude from both sides thereof.

The core seating projections 3 allow the position of the core to be determined at the time of manufacturing the hollow knuckle using the core 2, and the core is seated at a predetermined position and is maintained in a seated state, thereby facilitating the manufacture of the hollow knuckle.

However, in the conventional core, there is a problem that the position of the core is unstable when the mold for manufacturing the knuckle is assembled by deformation of the core or manufacturing and scattering of the core. Further, there is a problem that the projections are damaged during the manufacturing process of the hollow knuckle.

The prior art for the present invention may be exemplified by the disclosure of the patent specification of Japanese Laid-Open Patent Application No. 2015-0097266.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a hollow knuckle core in which protrusions are projected to one end and both sides of a core for manufacturing a hollow knuckle to facilitate positioning of the core when the hollow knuckle mold is assembled .

In order to accomplish the above object, the present invention provides a core disposed inside the hollow knuckle when manufacturing a hollow knuckle manufactured by a hollow knuckle metal comprising a upper mold and a lower mold, wherein the hollow knuckles are engaged with each other The first unit hollow knuckle and the second unit hollow knuckle, wherein the core includes: a first projection projecting from the one end portion to fix the position of the core on the inside of the hollow knuckle metal; And a second protrusion protruding to a portion where the mold and the lower mold are in contact with each other.

According to the present invention as described above, protrusions are projected to one end and both sides of a core for manufacturing a hollow knuckle, so that it is easy to maintain the position of the core when the hollow knuckle mold is assembled.

1 is a perspective view showing an example of the construction of a core for manufacturing a hollow knuckle according to a conventional technique.
2 is a perspective view showing an example of the construction of a core for manufacturing a hollow knuckle according to the present invention.
FIG. 3 is a view showing the use state of the core shown in FIG. 2. FIG.

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

2 is a perspective view showing an example of the construction of a core for manufacturing a hollow knuckle according to the present invention.

Referring to FIG. 2, the core 100 is formed with a predetermined length and width. Here, the shape of the core 100 is not limited to the shape shown in the drawings, and may be variously shaped according to the needs of the user.

The core 100 includes a first protrusion 110 and a second protrusion 120.

The first protrusion 110 protrudes at a predetermined height at one end of the core 100. The first protrusion 110 serves to fix the position of the core inside the hollow knuckle.

The second protrusion 120 protrudes to both sides of one end of the core 100 at a predetermined height. At this time, the second protrusion 120 protrudes into a parting line 1C in which a first unit hollow knuckle 1A and a second unit hollow knuckle 1B, which will be described later, are coupled to each other.

3 is a view showing the use state of the core shown in Fig.

Referring to FIG. 3, the arrangement of the core 100 will be described.

First, the hollow knuckle 1 will be described.

The hollow knuckle 1 in which the core 100 is disposed includes a first unit hollow knuckle 1A and a second unit hollow knuckle 1B. One side of each of the first unit hollow knuckle 1A and the second unit hollow knuckle 1B is recessed so that the core 100 can be disposed.

A predetermined space is formed between the first unit hollow knuckle 1A and the second unit hollow knuckle 1B so that the concave portions of the first unit hollow knuckle 1A and the second unit hollow knuckle 1B are engaged with each other. Here, the core 100 may be disposed as a space to be formed.

The first unit hollow knuckle 1A and the second unit hollow knuckle 1B are manufactured by a mold (not shown) for manufacturing a hollow knuckle which is composed of an upper mold and a lower mold. That is, the first unit hollow knuckle 1A can be manufactured as the upper mold, and the second unit hollow knuckle 1B can be manufactured as the lower mold. When each unit hollow knuckle is manufactured by the upper mold and the lower mold, the hollow knuckle can be manufactured by assembling the upper mold and the lower mold.

The core 100 is disposed inside the mold for manufacturing the hollow knuckle when the upper mold and the lower mold are combined for manufacturing the first unit hollow knuckle 1A and the second unit hollow knuckle 1B.

The first protrusion 110 fixes the position of the core 100 inside the mold for manufacturing the hollow knuckle.

The second protrusion 120 protrudes to a portion where the upper mold and the lower mold are in contact with each other. Accordingly, when the hollow knuckle is completed, the second projection 120 protrudes into the parting line 1C where the first unit hollow knuckle 1A and the second unit hollow knuckle 1B are coupled to each other.

The second protrusion 120 can support the core 100 on the inner side of the hollow knuckle 1.

According to the present invention configured as described above, protrusions are projected to one end and both sides of a core for manufacturing a hollow knuckle, so that it is easy to maintain the position of the core in the mold when the hollow knuckle mold is assembled.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

100: Core
110: first projection
120: second projection

Claims (1)

1. A core disposed inside the hollow knuckle when manufacturing a hollow knuckle manufactured by a hollow knuckle mold comprising an upper mold and a lower mold,
Wherein the hollow knuckle includes a first unit hollow knuckle and a second unit hollow knuckle,
The core comprises:
A first projection projecting from the one end to fix the position of the core inside the hollow knuckle metal;
And a second protrusion protruded from both sides of the core to a portion where the upper mold and the lower mold are in contact with each other.

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