KR20160000996U

KR20160000996U - Mold for injection molding

Info

Publication number: KR20160000996U
Application number: KR2020140006818U
Authority: KR
Inventors: 박문명
Original assignee: 박문명
Priority date: 2014-09-18
Filing date: 2014-09-18
Publication date: 2016-03-28

Abstract

The present invention relates to a mold for injection molding, and more particularly, to a mold for injection molding capable of molding a plurality of products in one mold by replacing only a part of the mold.
The mold for injection molding according to an embodiment of the present invention is configured to mold various kinds of back covers of a TV, and the various kinds of back covers have a first part having the same shape and a second part having a different shape A mold base including a first cavity in which the first portion is molded and an engaging groove formed along an outer periphery of the first cavity; And a second cavity in which the second portion is molded, wherein the core is detachably coupled to the coupling groove so that the space in which the back cover is molded by the first cavity and the second cavity And the core is replaceable for molding of a desired type of back cover.

Description

[0001] MOLD FOR INJECTION MOLDING [0002]

The present invention relates to a mold for injection molding, and more particularly, to a mold for injection molding capable of molding a plurality of products having different sizes as one mold by replacing only a part of the mold.

Injection molding is a processing method in which a plastic material melted by heating is injected into a mold to solidify or harden (cure) the molded article. In addition to extrusion molding, it is one of the important molding methods for thermoplastic resins (thermoplastic resins). In addition, in thermosetting resins (thermosetting resins), mass production is possible because production speed is faster than extrusion molding.

Generally, a mold for molding is composed of two mold plates. When a high-temperature molding material melted in the mold is filled with a high pressure, the filled molding material is cooled to produce a desired shape product. At this time, the template controls the flow of the filled molding material to the outside. The interrupted moldings are molded while being cured by cooling the template.

Such a mold for injection molding requires a large number of products to be produced precisely and uniformly, so that the time and cost required for manufacturing the same are considerable. Therefore, manufacturing the molds separately for the molded products having different shapes from each other entails a large expenditure of cost. Also, if the whole mold is replaced even if the product appearance changes partially due to the product development, the existing molds lose the further utility and the new molds must be continuously manufactured, resulting in a significant economic and time loss.

7 is a schematic cross-sectional view showing the difference between a conventional TV structure and a conventional TV structure.

In particular, referring to FIG. 7 (a), in the case of a conventional TV, the display panel 1 and the front 2 are separately manufactured and assembled together with the back cover 3 to produce a finished TV. At this time, when the size of the display panel 1 is changed, the size of each of the front 2 and the back cover 3 is adjusted to assemble the front 2 and the back cover 3 according to the changed display panel 1 So that it was not necessary to fabricate a mold for molding a separate back cover.

7 (b), in the case of a recent TV, since the display panel 1 'and the front 2' are produced in a state in which they are bonded together at the same time, the size of the back cover 3 ' There is a restriction that the thickness must match the coupling module of the display panel 1 'and the front 2'. In addition, since a large number of products having different fixing holes used for fixing the front 2 'and the back cover 3' to each other are produced depending on the maker of the same size panel, There was a burden to make. That is, when the size or shape of the display panel 1 'is changed, the back cover 3' must also be changed, and accordingly, a separate back cover mold must be manufactured for each different product Respectively. Such a problem is further exacerbated by frequent changes in the size and shape of the product as the development of display panel related technology progresses rapidly.

An attempt has been made to mold a molded article having a different shape and size using the same mold. Such conventional techniques can form a plurality of molded articles having different effective areas and form a molded article having a different shape or area by replacing the core plate corresponding to the outer peripheral edge (see prior art document 1).

However, when the other parts except for the outer periphery of the product are different from each other, there is a problem that the above-described conventional technique is difficult to apply, and there is a problem that only one product can be molded at the same time as a flat plate molded product.

KR10-2008-0111445A publication "Mold for injection molding" (December 23, 2008)

The present invention has been made to solve the above-mentioned problems of the conventional injection molding dies, and it is an object of the present invention to provide a mold base including a cavity in which parts having the same shape are molded, And the core including the core is detachably coupled, thereby forming a plurality of products having different shapes as a whole.

The tasks of the present invention are not limited to the tasks mentioned above, and other tasks not mentioned may be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a mold for injection molding according to one embodiment of the present invention, which can mold various kinds of back covers of a TV, 1. A mold for injection molding comprising a second portion having a different shape, comprising: a mold base including a first cavity in which a first portion is molded and an engaging groove formed along an outer periphery of the first cavity; And a second cavity in which the second portion is molded, wherein the core is detachably coupled to the coupling groove, thereby forming a space in which the back cover is molded by the first cavity and the second cavity, And is replaceable for forming a desired type of back cover.

According to another feature of the present invention, the mold base and the core are fastened by inserting the core fixing bolt into the first core fixing hole formed in the bottom surface of the coupling groove and the second core fixing hole penetrating the core .

According to another feature of the present invention, the first cavity is characterized by forming a plurality of separated spaces.

According to another feature of the present invention, the second cavity is characterized by forming a plurality of separated spaces.

According to another aspect of the present invention, a hole is formed in the back cover by inserting a hole forming bolt into the panel fixing hole formed in the core.

According to the present invention, a plurality of products having different shapes as a whole can be molded as a single mold. By simultaneously molding such one or more products, the product production efficiency can be improved and the time and cost required for mold production can be reduced.

1 is a plan view showing a mold for injection molding according to an embodiment of the present invention.
2 is a sectional view taken along the line AA in Fig.
3 is a plan view of the mold base of Fig.
4 is a plan view showing the core of Fig.
5 is a plan view showing a mold for injection molding according to another embodiment of the present invention.
6 is a plan view showing a mold for injection molding according to another embodiment of the present invention.
7 is a schematic cross-sectional view showing the difference between a conventional TV structure and a conventional TV structure.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and how to accomplish them, will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the present invention is not limited to the embodiments disclosed herein but may be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concept of the invention to those skilled in the art. Is provided to fully inform the owner of the category of design, and the design is only defined by the scope of the claim.

It is to be understood that elements or layers are referred to as being "on " other elements or layers, including both intervening layers or other elements directly on or in between. Like reference numerals refer to like elements throughout the specification.

Although the first, second, etc. are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, it goes without saying that the first component mentioned below may be the second component within the technical idea of the present invention.

Hereinafter, a mold for injection molding according to the present invention will be described with reference to the accompanying drawings.

Typical injection-molding molds include a stationary-side mold and a movable-side mold. The fixed-side mold is constituted by a fixed-side mounting plate, a fixed-side mold plate, a fixed-side core, etc., which are fixedly coupled to each other by fastening bolts or the like. The movable-side mold includes a movable-side mounting plate, a movable-side mold plate, a movable-side core, a spacer block, and the like, which are fixedly coupled to each other by fastening bolts or the like.

A parting line is formed between the stationary side mold plate and the movable side mold plate when the stationary side mold and the movable side mold are in close contact with each other. When the movable side mold plate is closely contacted with the stationary side mold plate, A cavity of a product shape in which the product is molded is formed. When the molten molding material is injected into the cavity to mold the product, and the molding is cooled and solidified, the fixed side mold and the movable side mold are opened and the molded product is discharged from the mold.

The 'injection molding die' described in this specification corresponds to the fixed side mold or the movable side mold. Specifically, it should be noted that the respective components in the embodiments described below are formed or included in the fixed-side template or the movable-side template.

1 is a plan view showing a mold for injection molding according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, FIG. 3 is a plan view showing the mold base of FIG. 1, Fig.

Referring to Figs. 1 to 4, an injection mold 100 according to an embodiment of the present invention includes a mold base 110 and a core 130. Fig.

The mold base 110 includes a first cavity 111 in which the product is molded, a coupling groove 112 to which the core 130 is coupled, and a first core fixing hole 113. It should also be noted that the mold base 110 includes other mold elements (not shown) necessary for molding and ejecting the product during injection molding.

The first cavity 111 is disposed on the mold base 100, and the molten molding material is injected at a high temperature and a high pressure to fill the mold, thereby forming a space in which the molding is cooled and solidified. The first cavity 111 is sufficiently separated from the other region of the mold 100 for injection molding in addition to the second cavity 131 to be described later so that the material such as the molding material, .

In addition, the first cavity 111 forms a space in which parts (first parts) having the same size and shape, that is, parts common to each other, are molded out of a plurality of products having different sizes or shapes. That is, the products molded through the injection molding metal mold 100 have portions having the same size and shape, and the common portions thereof are formed in the first cavity 111. Accordingly, when molding one product after molding one product, the first cavity 111 remains unchanged.

The engaging groove 112 is a space into which the core 130 is inserted and is formed along the periphery of the first cavity 111 on the mold base 110 as shown in Fig. The engaging groove 112 is formed at a lower angle than the outer periphery of the first cavity 111 in a recessed shape and the core 130 is coupled to the engaging groove 112 to form a mold. A description thereof will be given later.

The first core fixing hole 113 is formed on the bottom surface of the coupling groove 112. The first core fixing hole 113 may be formed in a generally recessed hole shape, or may be formed as an inner threaded hole.

The core 130 includes a second cavity 131 in which the product is molded, a second core fixing hole 133, and a panel fixing hole 135. The core 130 may be formed integrally, but may be formed by assembling a plurality of separated core pieces as shown in Figs. For example, the transverse core portion and the longitudinal core portion may be separated so that each of the separated core pieces may be individually bonded to the mold base 110. In addition, the core pieces separated in the height direction may be laminated and joined to the engaging groove 112, so that the thickness of the product to be molded may be adjustable. That is, the core 130 need not necessarily be integrally formed but can be made of a combination of a plurality of separated pieces.

4, the second cavity 131 is disposed on the core 130, and the molten molding material is injected at a high temperature and a high pressure to fill the mold, thereby forming a space in which the molding is cooled and solidified. In this embodiment, the second cavity 131 forms a space in which the outer peripheral edge of the TV back cover is molded. 2, the second cavity 131 may be formed in the other area of the mold 100 for injection molding in addition to the first cavity 111 described above when the upper plate 30 covers the upper side of the mold 100, So that the molding material or the like other than the carbonized gas generated during molding may not flow out to other regions.

In addition, the second cavity 131 forms a space in which a plurality of products having different sizes or shapes are not common to each other, that is, a space in which the size and shape (second portion) differ. That is, the product molded through the injection molding metal mold 100 has portions different in size or shape from each other, and the different portion is molded in the second cavity 131. [ In other words, the second cavity 131 is formed where the remaining parts except the common parts among the respective molded products are molded. Therefore, the second cavity 131 is changed by replacing the core 130 when molding one product and then molding another product.

The second cavity 131 forms a space in which the product 130 is molded together with the first cavity 111 by coupling the core 130 to the mold base 110. As a result, the molding material is injected into the space formed by the first cavity 111, the second cavity 131, and the upper plate 20 and cooled to form a single product. In this embodiment, the second cavity 131 may be implemented in various forms according to the shape, size, and arrangement of the coupling holes of the TV display panel and the front coupling module. For example, when the size of the coupling module is increased, as shown in FIG. 2 (b), the second cavity 131 is formed outside the core 130 .

The second core fixing hole 133 is a hole formed through the core 130. The second core fixing hole 133 is formed so as to coincide with the position of the first core fixing hole 113 when the core 130 is engaged with the coupling groove 112. Therefore, the positions of the second core fixing holes 133 of the respective cores 130 for molding different products are always constant. That is, since the size of the coupling groove 112 of the mold base 110 and the position of the first core fixing hole 113 are constant, the size of the core 130 and the position of the second core fixing hole 133 are maintained .

The panel fixing hole 135 is a hole into which the hole forming bolt 20 is inserted so that a hole can be formed in the product to be molded. Thus, the hole formed in the product is a hole used in connection with the display panel module. Therefore, the position of the panel fixing hole 135 can be changed according to the product to be molded like the second cavity 131. On the other hand, even a product having the same size may have a hole for fixing the panel at a certain position, so that a hole-forming bolt having such a size as not to protrude outside the panel fixing hole 135 may be used.

The core 130 as described above is inserted into the coupling groove 112 and is detachably coupled to the mold base 110. At this time, the core 130 and the mold base 110 are fixed to each other by inserting the core fixing bolts 10 into the first core fixing hole 113 and the second core fixing hole 133 as shown in FIG. And may be combined by various other known fastening means. Further, when the core 130 is inserted into the coupling groove 112, a separate supporting member (not shown) is used to apply force from the outside to the inside of the core 130, The cavity 131 can be continuously connected.

5 is a plan view showing a mold for injection molding according to another embodiment of the present invention.

Referring to Fig. 5, another embodiment of a mold 200 for injection molding includes a mold base 210 and a core 230. Fig.

The injection mold 200 of the present embodiment has the same configuration as the first cavity 211 and the second cavity 231, except that the injection mold differs from the injection mold 100 of FIG. Only the difference will be described in detail below, and a description of the same configuration will be omitted.

The first cavity 211 can be formed as a separate space in which a part that is separated in one product can be molded at the same time. That is, the first cavity 211 can form a space in which a plurality of products having different sizes or shapes are common to each other, that is, a product having a plurality of portions having the same size and shape. For example, as shown in Fig. 5, a part common to products exists separately in two parts, and each part is molded in separate first cavities 211a and 211b. On the other hand, as in the embodiment of FIG. 1, the first cavity 211 remains unchanged when another product is molded after molding one product.

The second cavity 231 forms a space in which parts that are not common to each other in a plurality of products having different sizes or shapes, that is, parts where the sizes and shapes are different, are molded. Further, the second cavity 231 is changed by replacing the core 230 when one product is molded and then another product is molded.

The mold base 210 including the first cavity 211 and the core 230 including the second cavity 231 are coupled to each other so that a product in which parts having a common shape and size are separated can be molded have.

6 is a plan view showing a mold for injection molding according to another embodiment of the present invention.

Referring to FIG. 6, another embodiment of the injection mold 300 includes a mold base 310 and a core 330.

The injection mold 300 of the present embodiment has the same configuration as the first cavity 311 and the second cavity 331, except that the injection mold differs from the injection mold 100 of FIG. Only the difference will be described in detail below, and a description of the same configuration will be omitted.

The first cavity 311 may form a separate space in which a plurality of products having portions having a common size and shape can be molded at the same time. That is, the first cavity 311 can form a space in which a plurality of products having a common portion among a plurality of products having different sizes or shapes can be molded at the same time. For example, as shown in Fig. 6, a portion common to the products is formed in the first cavities 311a and 311b which are separated from each other. On the other hand, as in the embodiment of FIG. 1, the first cavity 311 remains unchanged when molding one product and then molding another product.

The second cavity 331 forms a space in which parts that are not common to each other in a plurality of products having different sizes or shapes, that is, parts in which the sizes and shapes are different, are molded. In addition, the second cavity 331 is formed as a plurality of separate spaces, so that a plurality of products can be simultaneously molded. Further, the second cavity 331 is changed by replacing the core 330 when one product is molded and then another product is molded.

The mold base 310 including the first cavity 311 and the core 330 including the second cavity 331 are combined to form a plurality of products simultaneously. Further, by replacing a core having a second cavity of another shape, a plurality of products having a partly different shape or size can be molded in the same mold base 310.

The second cavities 131, 231 and 331 in which a part of the product having a different shape or size is molded are formed on the mold bases 110, 210, 230, and 330 can be formed by replacing only the cores 130, 230, and 330, thereby forming a plurality of products with one mold. It is possible to reduce the production cost and increase the production efficiency because there is no need to hold a plurality of molds.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art. You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

110, 210, 310 ... Mold base
111, 211, 211a, 211b, 311, 311a, 311b ... The first cavity
112 ... Joining groove
113 ... The first core fixing hole
130, 230, 330 ... core
131, 231, 331, 331a, 331b ... The second cavity
133 ... The second core fixing hole
135 ... Panel fixing hole
100, 200, 300 ... Mold for injection molding
10 ... Core fixing bolt
20 ... Hole forming bolt
30 ... Top plate

Claims

A mold for injection molding comprising a first part having the same shape as the first part and a second part having a different shape from each other,
A mold base including a first cavity in which the first portion is molded and an engaging groove formed along an outer periphery of the first cavity; And
And a second cavity in which the second portion is molded,
The core is detachably coupled to the coupling groove, thereby forming a space in which the back cover is formed by the first cavity and the second cavity,
Wherein the core is replaceable for molding of a desired type of back cover.

The method according to claim 1,
Wherein the mold base and the core are fastened by inserting a core fixing bolt into a first core fixing hole formed on a bottom surface of the coupling groove and a second core fixing hole penetrating the core.

The method according to claim 1,
Wherein the first cavity forms a plurality of separated spaces.

The method of claim 3,
And the second cavity forms a plurality of separated spaces.

The method according to claim 1,
Wherein a hole is formed in the back cover by inserting a hole forming bolt into the panel fixing hole formed in the core.