KR101657269B1 - Molding apparatus and molding method using the same - Google Patents

Abstract

An invention relating to a multipurpose article injection molding apparatus and a molding method is disclosed. The disclosed multipurpose injection molding machine comprises a first mold apparatus, a second mold apparatus in which an injection section injected with the first injection apparatus is interlocked with the first mold apparatus, and a main core apparatus And a control unit.
According to another aspect of the present invention, there is provided a method of molding a multifunctional article, comprising the steps of: (a) injecting an injection material into an injection part formed between a first mold apparatus and a second mold apparatus; and (b) And molding the molded part of the injection product by moving the main core device to be installed.

Description

[0001] DESCRIPTION [0002] MOLDING APPARATUS AND MOLDING METHOD USING THE SAME [0003]

The present invention relates to a multipurpose injection molding apparatus and a molding method, and more particularly, it relates to a multipurpose injection molding apparatus and a molding method which can eliminate the weld line generated in the injection process and eliminate defects due to unformed and residual stress, The present invention relates to a molding apparatus and a molding method.

Generally, the production of a conventional hole-formed article requires that the flow of the molten material is diverted by the core because the molten material is injected into the mold with the core for making the hole fixed in the cavity, The molten material solidifies and the molten material on the side of the mold wall is bonded in a hardened state, so that there is a problem in that a long line-shaped weld line is formed along the flow direction in an apparent manner in which complete bonding is not achieved.

Such a weld line is vulnerable to an external impact and is accompanied by drawbacks that the strength is significantly lower than other portions. In order to solve each of these problems, conventionally, in order to hide the weld line, which is a visible defect on the surface of a molded product, a thin color is painted on the surface of the weld line and the gate position is changed to induce the weld line The thickness of the weld line portion is reinforced to obtain a partial strength

However, it was only partially possible to change the gate and to increase the thickness of the molded part, not the general method. Particularly, there was a difficulty in producing a molded article requiring strength.

Therefore, there is a need to improve this.

The technical structure described above is a background technique for assisting the understanding of the present invention, and does not mean the prior art widely known in the technical field to which the present invention belongs.

The present invention has been made in view of the above needs, and it is an object of the present invention to eliminate the weld line generated in the plastic injection, to eliminate defects due to unformed and residual stress in the injection molding of the shape of the partial thin film in the product design, And an object of the present invention is to provide a multipurpose injection molding apparatus and a molding method capable of improving reliability.

Another object of the present invention is to eliminate the appearance defects due to the molten metal in the weld line, which is often caused by the injection of the plastic resin to which the metal is added, so that the design that can not be applied can be applied.

A multipurpose injection molding apparatus according to the present invention is a multipurpose injection molding apparatus comprising: a first mold apparatus; a second mold apparatus in which an injection section injected with the first injection apparatus is interlocked with the first mold apparatus; And a main core device.

The second mold apparatus is characterized in that the second mold apparatus has a feed section having an injection section, a main moving part for controlling the operation of the main core device so that the molding part is formed, and a main opening part formed to pass through the feed part and the main moving part.

Further, the main core apparatus is characterized in that the main core apparatus is movably provided with respect to the injection section to selectively open and close the main opening.

The main core apparatus further includes a pin member extending in the moving direction of the main moving part along the main opening, and a sleeve member movably installed outside the pin member in response to the operation of the main moving part.

Further, the pin member is provided so as to be movable in a direction parallel to the sleeve member.

It is further characterized by further comprising an auxiliary core device provided in the first mold apparatus for interlocking with the main core apparatus to form a forming section.

The first mold apparatus may further include an auxiliary fixing unit having an injection unit, an auxiliary moving unit for controlling the operation of the auxiliary core unit so that the molding unit is formed, and an auxiliary opening formed to pass through the auxiliary fixing unit and the auxiliary moving unit. do.

Further, the auxiliary core device is characterized by having a forming member provided on the auxiliary moving part.

Further, the molded member is moved along the auxiliary moving portion and selectively opens and closes the auxiliary opening portion.

Further, the main opening portion, the molding portion and the auxiliary opening portion are arranged side by side.

According to another aspect of the present invention, there is provided a method of forming a multipurpose article, comprising the steps of: (a) injecting an injection material into an injection part formed between a first mold apparatus and a second mold apparatus; and (b) And molding the molded part of the injection molding by moving the main core device installed in the main opening part.

In addition, the step (a) is characterized in that the injection molding is injected while the main opening formed in the second mold apparatus is closed.

Further, in the step (b), the sleeve member, which is fixedly held on the pin member of the main core device and movably installed on the outer side of the pin member, moves along the main opening portion and is formed as a boss- And molding.

In the step (b), the pin member and the sleeve member of the main core unit are moved along the main opening, and the protrusion-shaped molding unit integrally formed with the molded product is molded.

In the step (b), the main core unit and the auxiliary core unit installed in the first mold unit are moved in the same direction, and a molding unit formed to penetrate through the molding is formed.

In addition, in the step (a), the injection material is injected in a state where the auxiliary opening formed in the first mold apparatus and the main opening formed in the second mold apparatus are hermetically sealed. In the step (b), after the injection of the injection material is completed .

A multipurpose injection article molding apparatus and a molding method according to the present invention are characterized in that a fixed mold for forming a molded part in a mold is removed and a boss, It is possible to form a hole-shaped molded part, and it is possible to remove the weld line of the product.

In addition, the present invention can improve the productivity and reliability by eliminating defects due to unformed and residual stress in the injection molding of the shape of the partial thin film in the product design.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a multipurpose article injection molding apparatus according to a first embodiment of the present invention,
Fig. 2 is a view showing the shape of a boss of a blanket produced by the multipurpose blanks molding apparatus according to the first embodiment of the present invention, Fig.
Fig. 3 is a view showing the projection shape of the article to be squeezed by the multipurpose article injection molding apparatus according to the first embodiment of the present invention, Fig.
4 is a view showing a multipurpose article injection molding apparatus according to a second embodiment of the present invention,
FIG. 5 is a view showing a hole shape of a discharged article by the multipurpose article injection molding apparatus according to the second embodiment of the present invention,
6 is a flowchart illustrating a method of forming a multipurpose article according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a multipurpose article molding apparatus and a molding method according to the present invention will be described with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. In addition, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

Fig. 1 is a view showing a multipurpose article injection molding apparatus according to a first embodiment of the present invention, Fig. 2 is a view showing the shape of a boss of a multipurpose article injection molding apparatus according to the first embodiment of the present invention Fig. 3 is a view showing the projecting shape of the article to be squeezed by the multipurpose article injection molding apparatus according to the first embodiment of the present invention.

1 to 3, a multipurpose article molding apparatus 10 according to a first embodiment of the present invention includes a first mold apparatus 100, a second mold apparatus 200, and a main core apparatus 260, .

The first mold apparatus 100 and the second mold apparatus 200 are arranged side by side. At least one of the first mold apparatus 100 and the second mold apparatus 200 is formed with an injection section 300 interlocked with another mold apparatus to inject an injection product.

The injection port 112 is formed in the first mold apparatus 100 so as to communicate with the injection section 300 of the second mold apparatus 200 to inject the injection material. The injection port 112 is formed at the center of the first mold apparatus 100 and is formed by a locate ring 114 and a sprue bushing 116.

A spout bushing 116 is formed at the center of the first fixing plate 110 of the first mold apparatus 100 by a locating ring 114 and communicated with the inlet port and passing through the first mold apparatus 100 in a straight line. The injection port 112 is formed and connected to the injection part 300.

Here, the injection part 300 is formed by coupling of the first and second mold devices 100 and 200, and may be formed in various shapes according to the shape of the injection object such as a plane shape, a convex shape, or a concave shape.

The second mold apparatus 200 includes a feed unit 220 having an injection unit 300, a main moving unit 230 for controlling the operation of the main core unit 260 so that the molding unit is formed, And a main opening 240 formed to pass through the main moving part 230.

The dispensing unit 220 is provided at the foremost side of the second mold apparatus 200 so as to be in contact with the first mold apparatus 100 and the dispensing unit 300 is recessed in the dispensing unit 220.

The main moving part 230 is provided on the rear side of the feeding part 220 and is movable by the main hydraulic cylinder 250. At this time, a second fixing plate 210 is provided on the rear side of the main moving part 230, and the main hydraulic cylinder 250 is supported on the second fixing plate 210 to move the main moving part 230.

The main core unit 260 is provided in the second mold apparatus 200 to mold a molded part of an injection molding and is movably installed with respect to the injection part 300 to selectively open and close the main opening part 240.

The main core device 260 moves along the main opening portion 240 to move to the outside of the pin member 262 in conjunction with the operation of the pin member 262 and the main moving portion 230 extending in the moving direction of the main moving portion 230, And a sleeve member 264 that is installed as far as possible.

The pin member 262 is movably installed in a direction parallel to the sleeve member 264.

In this embodiment, the sleeve member 264 has an end fixed to the main moving part 260 and hollow, the end part of the pin member 262 is screw-connected to the second fixing plate 210, and the sleeve member 264 . That is, the pin member 262 can be moved in the main opening portion 240 by rotation, and the sleeve member 264 can be moved in the main opening portion 240 by the movement of the main moving portion 230 by the main inflow cylinder 250 It is movable. At this time, the main moving part 230 and the second fixing plate 210 are spaced apart from each other in order to move the main moving part 230.

The pin member 262 may be moved by a rotational force applied by a motor (not shown), may not be coupled with a screw type, may be moved by a separate actuator, or the like.

Thus, the boss can be molded into the injection mold when only the sleeve member 264 is moved as shown in Fig. 2 by the movable sleeve member 264 and the pin member 262 in the main opening portion 240, The protrusion can be formed on the injection mold when the pin member 262 and the sleeve member 264 are moved together as shown in FIG.

Hereinafter, a multipurpose injection molding apparatus according to a second embodiment of the present invention will be described with reference to the drawings. For convenience of description, the same reference numerals are used for the same components as those of the first embodiment, and a detailed description thereof will be omitted.

FIG. 4 is a view showing a multipurpose article injection molding apparatus according to a second embodiment of the present invention, and FIG. 5 is a view showing a hole shape of a multipurpose article injection molding apparatus according to a second embodiment of the present invention .

4 and 5, a multipurpose injection molding apparatus 10 according to a second embodiment of the present invention includes an auxiliary core device (not shown) for interlocking with a main core device 260 in a first mold apparatus 100, (160).

The first mold apparatus 100 includes an auxiliary fixing unit 120 having an injection unit 300 and an auxiliary moving unit 130 for controlling the operation of the auxiliary core unit 160 so that the molding unit is formed, (140) formed to pass through the auxiliary moving part (120) and the auxiliary moving part (130).

The main opening portion 240 and the molding portion of the injection molding and the auxiliary opening portion 140 are arranged side by side.

The auxiliary core device 160 includes a forming member 162 that is installed in the auxiliary moving part 130. [

The molded member 162 is moved along the auxiliary moving part 130 and selectively opens and closes the auxiliary opening part 140. [

This is because the molded member 162 is formed to face the sleeve member 264 and the end portion is fixed to the auxiliary moving portion 130 and is moved in accordance with the movement of the auxiliary moving portion 130.

Hydraulic cylinder supports 155 are provided on both sides of the auxiliary fixing unit 120 and the auxiliary hydraulic cylinders 150 are supported by the hydraulic cylinder supports 155 to move the auxiliary moving unit 130. [ That is, the auxiliary moving unit 130 is movable between the auxiliary fixing unit 120 and the second fixing plate 210 by the auxiliary hydraulic cylinder 150, and the auxiliary fixing unit 120 is moved for the movement of the auxiliary moving unit 130, And the auxiliary moving part 130 are spaced apart from each other. The sleeve member 264 and the pin member 262 corresponding to the molding member 162 move to the molding member 162 when the molding member 162 moves through the auxiliary opening 140 by the movement of the auxiliary moving unit 130 162, it is possible to form holes in the injection mold as shown in FIG.

Hereinafter, a method for forming a multipurpose article according to an embodiment of the present invention will be described.

6 is a flowchart illustrating a method of forming a multipurpose article according to an embodiment of the present invention.

Referring to FIG. 6, the method for molding a multipurpose article according to an exemplary embodiment of the present invention includes the steps of (a) forming an injection part 300 formed between a first mold apparatus 100 and a second mold apparatus 200, (S20) of molding the molded part of the molded product by moving the main core device (260) installed in the main opening part (240) formed to penetrate the second mold device (200).

First, in step (a), when the injection material is injected through the injection port 112 of the first mold apparatus 100, the injection material reaches the runner 118 along the sprue bushing 116, 118 to the respective injection parts 300. At this time, the main opening 240 formed in the second mold apparatus 200 is injected with the injection molding in a closed state. Thereafter, the main core device 260 forms a molded part in the injection molding (S20).

2, after the primary injection into the injection part 300, the pin member 262 of the main core device 260 is in a fixed state as shown in FIG. 2 And the sleeve member 264 movably installed on the outer side of the pin member 262 moves along the main opening 240 to realize a boss-shaped molded part in the injection molding, (S22).

The movement of the sleeve member 264 is enabled by the movement of the main moving part 230 by the operation of the main hydraulic cylinder 250 provided between the main moving part 230 and the second fixing plate 210.

3, after the primary injection into the injection part 300, the pin member 262 of the main core device 260 and the sleeve member 264 (see FIG. 3) ) Is moved along the main opening portion 240 to form a protrusion-shaped molding portion, and then the secondary injection is performed to complete the injection process (S24).

The sleeve member 264 is movable by the movement of the main moving part 230 and the pin member 262 passing through the sleeve member 264 is screwed to the second fixing plate 210, It is possible.

4 or FIG. 5, the main core device 260 and the auxiliary core device 160 provided in the first mold apparatus 110 can form a hole-shaped molded part in the injection molding.

The main core unit 260 and the auxiliary core unit 160 installed in the first mold apparatus 100 are moved in the same direction so as to be passed through the injection molding. By operation of the auxiliary hydraulic cylinder 150, The main core device 260 composed of the pin member 262 and the sleeve member 264 is retracted in the same direction as the movement direction of the molded member 162 when the molded member 162 presses the molded product, Thereby forming a hole-shaped molded part in the molded article (S26).

In the step (a) (S10), the auxiliary opening 140 formed in the first mold apparatus 100 and the main opening 240 formed in the second mold apparatus 200 are injected in a sealed state (b) Step S20 is performed after the injection of the injection material into the injection unit 300 is completed.

After the forming part is formed in the injection mold by the above method, the first mold apparatus 100 and the second mold apparatus 200 may be separated (S40) and the articles may be extracted when the cooling time is completed (S30).

As described above, according to the multipurpose injection molding apparatus and the molding method according to the embodiment of the present invention, the fixed mold for forming the molding portion in the mold is eliminated, and the molding portion is formed by the movable core device in the mold release The weld line can be removed.

Further, according to the multipurpose injection molding apparatus and molding method according to the embodiment of the present invention, it is possible to improve the productivity and reliability by eliminating the defects due to the unformed and residual stress in the injection of the shape of the partial thin film on the product design .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. I will understand. Accordingly, the true scope of protection of the present invention should be defined by the claims.

10: Multipurpose article molding apparatus 100: First mold apparatus
110: first fixing plate 112: inlet
114: Locate ring 116: Spruce Bush
118: runner 120: auxiliary fixing part
130: auxiliary moving part 140: auxiliary opening
150: auxiliary hydraulic cylinder 155: hydraulic cylinder support
160: auxiliary core device 162: molded member
200: second mold apparatus 210: second fixing plate
220: Govt 230: Joy East
240: main opening portion 250: main hydraulic cylinder
260: main core device 262: pin member
264: Sleeve member

Claims (16)

A first mold apparatus;
A second mold unit interlocked with the first mold unit to form an injection unit into which an injection material is injected; And
A main core device provided in the second mold apparatus for molding a molded part of the molded article;
And,
And an auxiliary core device provided in the first mold device and interlocking with the main core device to form the forming part.
The method according to claim 1,
Wherein the second mold apparatus includes a feed section having the injection section;
A main moving part for controlling the operation of the main core device so that the forming part is formed; And
And a main opening formed to pass through the receiving part and the main moving part.
3. The method of claim 2,
Wherein the main core device is movably installed with respect to the injection part to selectively open and close the main opening part.
3. The method of claim 2,
Wherein the main core device comprises: a pin member extending along the movement direction of the main moving part along the main opening; And
And a sleeve member movably installed on the outside of the pin member in association with the operation of the main moving part.
5. The method of claim 4,
Wherein the pin member is provided so as to be movable in a direction parallel to the sleeve member.
delete 3. The method of claim 2,
Wherein the first mold apparatus further comprises: an auxiliary fixing unit having the injection unit;
An auxiliary moving part for controlling the operation of the auxiliary core device so that the forming part is formed; And
And an auxiliary opening formed to pass through the auxiliary fixing portion and the auxiliary moving portion.
8. The method of claim 7,
Wherein the auxiliary core device comprises a forming member provided on the auxiliary moving part.
9. The method of claim 8,
Wherein the molding member is moved along the auxiliary moving part to selectively open and close the auxiliary opening part.
8. The method of claim 7,
Wherein the main opening portion, the forming portion, and the auxiliary opening portion are arranged side by side.
(a) injecting an injection material into an injection part formed between the first mold device and the second mold device; And
(b) forming a molded part of the molded product by moving a main core device installed in a main opening formed to penetrate the second mold device,
Wherein the step (b) includes moving the main core unit and the auxiliary core unit installed in the first mold unit in the same direction, and molding the molding unit formed to penetrate the injection unit.
12. The method of claim 11,
Wherein the step (a) injects the molded article in a state in which the main opening formed in the second mold apparatus is hermetically sealed.
12. The method of claim 11,
The step (b) may include the step of moving the pin member of the main core unit in a fixed state and the sleeve member movably installed on the outer side of the pin member to move along the main opening, Wherein the molding portion of the multi-purpose article is molded.
12. The method of claim 11,
Wherein the step (b) comprises moving the pin member and the sleeve member of the main core unit along the main opening, and shaping the molded part having a protrusion shape integrally formed with the molded product.
delete 15. The method according to any one of claims 11 to 14,
Wherein the step (a) injects the injection material in a state in which the auxiliary opening formed in the first mold apparatus and the main opening formed in the second mold apparatus are sealed;
Wherein the step (b) is performed after the injection of the injection material is completed in the injection part.

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