KR20120114647A - Molding apparatus and molding method using the same - Google Patents

Abstract

PURPOSE: An apparatus for forming multi-purpose molded products and a forming method thereof are provided to remove a weld line of a injected product by removing fixed frames from a mold and using main and auxiliary core devices. CONSTITUTION: An apparatus(10) for forming multi-purpose molded products comprises a first mold unit(100), a second mold unit(200), and a main core unit(260). The second mold unit forms an injection part(300) receiving injected materials. The main core unit is installed in the second mold unit and forms a forming part for the injected materials.

Description

Multi-purpose Injection Molding Apparatus and Forming Method {MOLDING APPARATUS AND MOLDING METHOD USING THE SAME}

The present invention relates to a multipurpose injection molding apparatus and a molding method, and more particularly, to remove weld lines generated in the injection process and to remove defects due to unmolding and residual stress, thereby increasing productivity and improving reliability. The present invention relates to a multipurpose injection molding apparatus and a molding method.

In general, the manufacture of a molded article having a hole has a low temperature mold wall surface when the flow of the melt is branched by the core and re-bonded because the melt is injected into the mold while the core for making the hole is fixed in the cavity. Since the melt is solidified from the molten state of the mold wall side from the solidified state there is a problem that the appearance of a long line-shaped weld line along the flow direction to the appearance that the complete bond is not made.

This weld line is weak against external shocks and has a drawback that is significantly lower than other parts in strength. In order to solve each of these problems, conventionally, a thin coating on the weld line surface is used to hide weld lines, which are visible defects on the surface of the molded part, and the gate position is changed to induce the weld line to be less affected by the strength. Partial strength by reinforcing the thickness of the weld line portion

In order to improve, however, the process of painting the molded parts was added, and the change of the gate and the thickness of the molded parts were also partially possible instead of the general method. In particular, 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 created by the necessity as described above, to remove the weld line generated in the plastic injection, and to eliminate the defects due to the unmolding and residual stress in the injection of the shape consisting of a thin film in the product design and increase the productivity An object of the present invention is to provide a multi-use injection molding apparatus and a molding method that can improve the reliability.

In addition, an object of the present invention is to remove the appearance defects caused by metal droop of the weld line which is often generated in the injection of the plastic resin to which the metal is added to make it possible to apply a design that was not applicable.

The multi-purpose injection molding apparatus according to the present invention is provided in the second mold apparatus and the second mold apparatus and the second mold apparatus is formed in the second mold apparatus and the first mold apparatus, the injection portion is injected in cooperation with the first mold apparatus for molding the molded part of the injection molding And a main core device.

In addition, the second mold apparatus is characterized in that it comprises a main portion provided with an injection portion, a main moving portion for controlling the operation of the main core device to be molded, and a main opening portion formed to penetrate the main portion and the main moving portion.

In addition, the main core device is installed to be movable relative to the injection portion is characterized in that for opening and closing the main opening selectively.

In addition, the main core device is characterized in that it comprises a pin member extending in the movement direction of the main moving portion along the main opening and the sleeve member movably installed outside the pin member in conjunction with the operation of the main moving portion.

In addition, the pin member is characterized in that it is installed to be movable in parallel with the sleeve member.

In addition, the first mold apparatus is characterized in that it further comprises an auxiliary core device for forming a molded part in conjunction with the main core device.

In addition, the first mold apparatus is characterized in that it comprises an auxiliary fixing portion provided with an injection portion, an auxiliary moving portion for controlling the operation of the auxiliary core device so that the molding portion is molded, and an auxiliary opening formed through the auxiliary fixing portion and the auxiliary moving portion. do.

In addition, the auxiliary core device is characterized in that it comprises a molding member which is installed in the auxiliary moving portion.

In addition, the molding member is moved along the auxiliary moving portion is characterized in that for selectively opening and closing the auxiliary opening.

In addition, the main opening portion, the molding portion and the auxiliary opening portion is characterized in that arranged side by side.

On the other hand, the multi-purpose injection molding method according to the present invention is: (a) injecting the injection molded part formed between the first mold apparatus and the second mold apparatus and (b) is formed to penetrate the second mold apparatus It characterized in that it comprises the step of forming the molded part of the injection molding by moving the main core device installed in the main opening.

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

In addition, in step (b), the pin member of the main core device maintains a fixed state, and the sleeve member which is installed to be movable on the outside of the pin member is moved along the main opening, and the boss-shaped molded part formed integrally with the injection molding. It is characterized by molding.

In addition, step (b) is characterized in that for forming the projection-shaped molding formed integrally with the injection molding while moving the pin member and the sleeve member of the main core device along the main opening.

In addition, step (b) is characterized in that for forming the molded part formed to penetrate the injection molding while moving the auxiliary core device installed in the main core device and the first mold apparatus in the same direction.

In addition, step (a) injects the injection molding in a state in which the auxiliary opening formed in the first mold apparatus and the main opening formed in the second mold apparatus is sealed, step (b) after the filling of the injection molding in the injection molding unit is completed It is characterized in that the operation.

The multi-purpose injection molding apparatus and molding method according to the present invention has a boss shape, a projection shape, or the like in the injection molded product by the main core device and the auxiliary core device that can remove the fixed frame for forming the molded part in the mold, and move to the injection part side. It is possible to form a molded part of the hole shape has the effect of removing the weld line of the injection molded product.

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

1 is a view showing a multi-purpose injection molding apparatus according to a first embodiment of the present invention,
Figure 2 is a view showing the boss shape of the injection molded product by the multi-purpose injection molding apparatus according to the first embodiment of the present invention,
Figure 3 is a view showing the projection shape of the injection molded product by the multi-purpose injection molding apparatus according to the first embodiment of the present invention,
4 is a view showing a multi-purpose injection molding apparatus according to a second embodiment of the present invention,
5 is a view showing the hole shape of the injection molded product by the multi-purpose injection molding apparatus according to a second embodiment of the present invention,
Figure 6 is a flow chart showing a multi-purpose injection molding method according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of a multi-purpose injection molding apparatus and molding method according to the present invention. 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, terms to be described below are terms defined in consideration of functions in the present invention, which may vary according to the intention or convention of a user or an operator. Therefore, definitions of these terms should be made based on the contents throughout the specification.

1 is a view showing a multi-purpose injection molding apparatus according to a first embodiment of the present invention, Figure 2 is a view showing a boss shape of the injection molded by a multi-purpose injection molding apparatus according to a first embodiment of the present invention 3 is a view showing the projection shape of the injection molded product by the multi-purpose injection molding apparatus according to the first embodiment of the present invention.

1 to 3, the multi-purpose injection molding apparatus 10 according to the first embodiment of the present invention, the first mold apparatus 100, the second mold apparatus 200 and the main core apparatus 260 It includes.

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 part 300 in which an injection is injected in cooperation with another mold apparatus.

In one embodiment, the first mold apparatus 100 is formed with an injection hole 112 in communication with the injection unit 300 of the second mold apparatus 200 is injected injection. The injection hole 112 is formed at the center of the first mold apparatus 100 and is formed by the locate ring 114 and the sprue bush 116.

An inlet is formed in the center of the first fixing plate 110 of the first mold apparatus 100 by the locate ring 114, communicates with the inlet, and passes through the first mold apparatus 100 in a straight line. Injection hole 112 is formed by the () is connected to the injection unit 300.

Here, the injection part 300 is formed by the combination of the first and second mold apparatuses 100 and 200, and may be formed in various shapes according to the shape of the injection molded product, such as a planar shape, a convex shape, and a concave shape.

The second mold apparatus 200 includes a main part 220 having an injection part 300, a main moving part 230 for controlling an operation of the main core device 260 to be molded, and a main part 220. And a main opening part 240 formed to penetrate the main moving part 230.

The main part 220 is provided at the foremost side of the second mold apparatus 200, is in contact with the first mold apparatus 100, and the injection part 300 is formed by being recessed in the main part 220.

The main moving unit 230 is provided at the rear side of the main fixing unit 220 and is movable by the hydraulic cylinder 250. In this case, the second fixing plate 210 is provided on the rear side of the main moving part 230, and the hydraulic cylinder 250 is supported by the second fixing plate 210 to move the main moving part 230.

The main core device 260 is provided in the second mold apparatus 200 to mold the molded part of the injection molding, and is installed to be movable relative to the injection part 300 to selectively open and close the main opening 240.

The main core device 260 is moved in the outer side 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 along the main opening 240. It includes a sleeve member 264 that is possibly installed.

The pin member 262 is installed to be movable in parallel with the sleeve member 264.

In the present embodiment, the sleeve member 264 has an end fixed to the main moving part 260 and is hollow, and the pin member 262 is screwed to the end of the second fixing plate 210, and the sleeve member 264 is fixed. Through) That is, the pin member 262 is movable in the main opening portion 240 by rotation, and the sleeve member 264 in the main opening portion 240 by the movement of the main moving portion 230 by the main inlet cylinder 250. It is mobile. In this case, the main moving part 230 and the second fixing plate 210 are spaced apart to move the main moving part 230.

The pin member 262 may be moved by applying a rotational force by a motor (not shown), and may be variously modified, such as not being coupled by a screw type and may be moved by a separate actuator.

Therefore, when only the sleeve member 264 is moved as shown in FIG. 2 by the sleeve member 264 and the pin member 262 which can move the main opening part 240, the boss can be molded into the injection molded product. As shown in FIG. 2, when the pin member 262 and the sleeve member 264 are moved together, a molded part having various shapes may be formed such as to form a protrusion on the injection molded product.

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.

4 is a view showing a multi-purpose injection molding apparatus according to a second embodiment of the present invention, Figure 5 is a view showing a hole shape of the injection molded product by the multi-purpose injection molding apparatus according to a second embodiment of the present invention .

4 and 5, the multi-purpose injection molding apparatus 10 according to the second embodiment of the present invention is a secondary core device for forming a molded part in conjunction with the main core device 260 in the first mold device 100 160 is further provided.

In this case, the first mold apparatus 100 includes the auxiliary fixing part 120 having the injection part 300 and the auxiliary moving part 130 and the auxiliary fixing part controlling the operation of the auxiliary core device 160 to be molded. And an auxiliary opening 140 formed to penetrate through the 120 and the auxiliary moving part 130.

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

The auxiliary core device 160 includes a molding member 162 installed on the auxiliary moving part 130.

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

The forming member 162 is formed to face the sleeve member 264, the end is fixed to the auxiliary moving part 130 is moved in accordance with the movement of the auxiliary moving part (130).

The hydraulic cylinder support 155 is provided at both sides of the auxiliary fixing part 120, and the auxiliary hydraulic cylinder 150 is supported by the hydraulic cylinder support 155 to move the auxiliary moving part 130. That is, the auxiliary moving part 130 is movable by the auxiliary hydraulic cylinder 150 between the auxiliary fixing part 120 and the second fixing plate 210, and the auxiliary fixing part 120 for the movement of the auxiliary moving part 130. And the auxiliary moving part 130 are spaced apart. Accordingly, as the molding member 162 moves the auxiliary opening 140 by the movement of the auxiliary moving part 130, the sleeve member 264 and the pin member 262 corresponding to the molding member 162 are formed in the molding member ( When moved by the movement of 162, it is possible to form a hole in the injection molding as shown in FIG.

Hereinafter, the multi-purpose injection molding method according to an embodiment of the present invention will be described.

Figure 6 is a flow chart showing a multi-purpose injection molding method according to an embodiment of the present invention.

Referring to Figure 6, the multi-purpose injection molding method according to an embodiment of the present invention (a) injection molding the injection portion 300 formed between the first mold apparatus 100 and the second mold apparatus 200. Injecting the step (S10) and the main core device 260 installed in the main opening 240 formed to penetrate the second mold apparatus 200 to form a molded part of the injection molding (S20).

First, in step (a) (S10), when the injection is injected through the injection hole 112 of the first mold apparatus 100, the injection along the sprue bush 116 reaches the runner 118, the runner ( Each injection part 300 is reached through 118. At this time, the injection opening 240 is injected into the main opening part 240 formed in the second mold apparatus 200. Thereafter, the molding unit is molded to the injection molded product by the main core device 260 (S20).

First, when the boss-shaped molded part is to be molded into the injection molded product, as shown in FIG. 2, after the primary injection into the injection part 300, the pin member 262 of the main core device 260 is fixed. The sleeve member 264 that is retained and movable to the outside of the pin member 262 is moved along the main opening 240 to implement a boss-shaped molded part in the injection molding, and then proceeds to the second injection to perform the injection process. It may be completed (S22).

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

In addition, in the case where it is desired to mold the projection-shaped molded part to the injection molding, as shown in FIG. 3, after the first injection into the injection part 300, the pin member 262 and the sleeve member 264 of the main core device 260 are formed. ) Is moved along the main opening 240 to implement the molded part of the projection shape in the injection molding, and then proceeds to the secondary injection to complete the injection process (S24).

Since the sleeve member 264 is movable by the movement of the main moving part 230, and the pin member 262 penetrating the sleeve member 264 is coupled to the second fixing plate 210 in a screw type, the sleeve member 264 is moved by rotation. It is possible.

On the other hand, as shown in Figure 4 or 5 by the auxiliary core device 160 provided in the main core device 260 and the first mold device 110 can be molded in the shape of a hole in the injection molding.

This is to move the auxiliary core device 160 installed in the main core device 260 and the first mold device 100 in the same direction so as to penetrate the injection molding, by the operation of the auxiliary hydraulic cylinder 150, the auxiliary moving part ( When 130 is moved and the molding member 162 presses the injection molded product, the main core device 260 including the pin member 262 and the sleeve member 264 retreats in the same direction as the moving direction of the molding member 162. Then, the molded part of the hole shape is molded in the injection molded product (S26).

In the step (a) (S10) is injected the injection in the state in which the auxiliary opening 140 formed in the first mold apparatus 100 and the main opening 240 formed in the second mold apparatus 200 is sealed. , (b) step S20 is operated after the injection is completed filling the injection unit 300.

After forming the molded part in the injection molding by the method as described above, when the cooling time is completed (S30), the first mold apparatus 100 and the second mold apparatus 200 may be separated (S40) to extract the injection product.

As described above, according to the multi-purpose injection molding apparatus and the molding method according to an embodiment of the present invention, since the fixed mold for forming the molded part in the mold is deleted, the molded part is formed by a movable core device at the time of injection. The weld line can be removed.

In addition, according to the multi-purpose injection molding apparatus and the molding method according to an embodiment of the present invention, by increasing the productivity and reliability by eliminating defects due to unmolding and residual stress in the injection molding of the part consisting of a thin film in the product design You can.

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: multi-purpose injection molding apparatus 100: the first mold apparatus
110: first fixing plate 112: injection hole
114: locate ring 116: sprue bush
118: runner 120: sub-government
130: auxiliary moving part 140: auxiliary opening
150: auxiliary hydraulic cylinder 155: hydraulic cylinder support
160: auxiliary core device 162: molding member
200: second mold apparatus 210: second fixing plate
220: the Chugo Government 230: the State Department
240: main opening 250: hydraulic cylinder
260: main core device 262: pin member
264: sleeve member

Claims (16)

A first mold apparatus;
A second mold apparatus in which an injection portion for injecting an injection material is formed in cooperation with the first mold apparatus; And
A main core device provided in the second mold apparatus to mold the molding part of the injection molded product;
Multi-purpose injection molding apparatus comprising a.
The method of claim 1,
The second mold apparatus includes a main portion provided with the injection unit;
A main moving part controlling an operation of the main core device to mold the molded part; And
And a main opening portion formed to penetrate through the main portion and the main moving portion.
The method of claim 2,
The main core device is a multi-purpose injection molding apparatus, characterized in that the movable opening is installed so as to selectively open and close the main opening.
The method of claim 2,
The main core device includes a pin member extending in the moving direction of the main moving portion along the main opening; And
And a sleeve member interlocked with the operation of the main moving part to be movable on the outside of the pin member.
The method of claim 4, wherein
The pin member is a multi-purpose injection molding apparatus, characterized in that installed to be movable in parallel with the sleeve member.
The method according to any one of claims 2 to 5,
And an auxiliary core device provided in the first mold apparatus and interlocked with the main core device to mold the molding part.
The method according to claim 6,
The first mold apparatus includes an auxiliary fixing unit provided with the injection unit;
An auxiliary moving part controlling an operation of the auxiliary core device so that the molding part is molded; And
And an auxiliary opening formed through the auxiliary fixing part and the auxiliary moving part.
8. The method of claim 7,
The auxiliary core device is a multi-purpose injection molding apparatus characterized in that it comprises a molding member installed in the auxiliary moving portion.
The method of claim 8,
The molding member is moved along the auxiliary moving portion and the multi-purpose injection molding apparatus, characterized in that for opening and closing the auxiliary opening selectively.
8. The method of claim 7,
The main opening portion, the molding portion and the auxiliary opening portion is a multi-purpose injection molding apparatus, characterized in that arranged side by side.
(a) injecting an injection product into an injection portion formed between the first mold apparatus and the second mold apparatus; And
(b) forming a molded part of the injection molded product by moving the main core device installed in the main opening formed through the second mold apparatus. 2.
12. The method of claim 11,
Step (a) is a multi-purpose injection molding method, characterized in that for injecting the injection molding in the state in which the main opening formed in the second mold apparatus.
12. The method of claim 11,
In the step (b), the pin member of the main core device maintains a fixed state, and the sleeve member installed to be movable on the outside of the pin member moves along the main opening and is integrally formed with the injection molded boss. The method for molding a multi-purpose injection article, characterized in that for molding the molded part.
12. The method of claim 11,
The step (b) is a multi-purpose injection molding method, characterized in that for forming the protruding portion formed integrally with the injection molding while moving the pin member and the sleeve member of the main core device along the main opening.
12. The method of claim 11,
Step (b) is a multi-purpose injection molding method, characterized in that for molding the molded part formed to penetrate the injection molding while moving the main core device and the auxiliary core device installed in the first mold apparatus in the same direction.
The method according to any one of claims 11 to 15,
In the step (a), the injection molding part is injected while the auxiliary opening formed in the first mold apparatus and the main opening formed in the second mold apparatus are sealed;
Step (b) is a multi-purpose injection molding method characterized in that the operation is performed after the filling of the injection to the injection unit is completed.

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