KR20160140205A

KR20160140205A - Injection molding apparatus for and method thereof

Info

Publication number: KR20160140205A
Application number: KR1020150076533A
Authority: KR
Inventors: 임상후
Original assignee: (주)코리아액티
Priority date: 2015-05-29
Filing date: 2015-05-29
Publication date: 2016-12-07

Abstract

An injection molding apparatus for dispensing a dissimilar material according to the present invention comprises: a first mold section which is installed so as to reciprocate in a first region and a second region formed on an upper surface of a table; and a second mold section which is moved to the first region or the second region A first molding groove is formed in the first region and the second region on the lower surface corresponding to the first mold portion, respectively, and the first molding groove is formed in the first region and the second region, And a second molding part formed at a boundary between the first molding part and the second molding part and a second molding part formed at a boundary between the first molding part and the second molding part, The second resin is injected into the second molding groove where the semi-manufactured article is placed when the first mold part moved to the first area or the second area is in close contact with the second mold part to form the finished article And an injection part.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an injection molding apparatus,

More particularly, the present invention relates to an apparatus and method for injection molding different kinds of materials, and more particularly, to an apparatus and method for injection molding of different materials, By additionally forming a heterogeneous resin on the outer surface of the semi-finished product, the injection station formed in the primary resin injection step is not exposed to the outside, so that the appearance is good, and the primary molding and the secondary molding can be carried out through one step. The present invention relates to an injection molding apparatus and a method for injection molding of different materials capable of molding.

2. Description of the Related Art Generally, an external lens or the like used for a rear lamp of a vehicle is a composite lens in which a plurality of partial lenses are integrated.

For example, a conventional composite lens has a multi-colored lens shape integrated with transparent and red, and has a feature in which lights of various colors are simultaneously displayed when light inside is turned on.

Such a conventional composite lens has been subjected to a primary molding using one material to form a multicolor using a different material, and then a method of bonding the different materials through an additional molding process has been used.

However, in the conventional compound lens forming method, since a process of molding a single material into a semi-finished product and then joining the different materials to the molded semi-finished product proceeds separately, a lot of time has been spent in the manufacturing process.

In the case of the conventional compound lens forming method using two molds, the first semi-finished product is molded by using one mold, and then the different product is covered with the different resin by using another mold to mold the finished product, Since the mold rotates 180 degrees and returns, the finished product is produced. Therefore, a lot of time has been spent in the manufacturing process, the mold production cost is high, and installation accuracy is required when two molds are mounted on the injection molding machine.

Further, since the operating radius must be secured due to the rotation of the mold, it is difficult to secure a space for installing the apparatus, which causes a rise in manufacturing cost.

A prior art related to the present invention is Korean Patent Laid-Open No. 10-2005-0040876 (May 03, 2005), which discloses a method of manufacturing an aspheric lens for a vehicle headlight and an apparatus therefor.

It is an object of the present invention to provide a method for manufacturing a semiconductor device, which comprises molding a semifinished product through a primary resin injection process in a mold, adding a different resin to the outer surface of the semifinished product through a position change and a secondary resin injection process, The present invention provides an injection molding apparatus and method of dissimilar materials capable of continuous molding because the injection station formed in the injection process is not exposed to the outside and the appearance is good and the primary molding and the secondary molding can be performed through a single process .

An injection molding apparatus for dispensing a dissimilar material according to the present invention comprises a first mold section which is installed so as to reciprocate in a first region and a second region formed on an upper surface of a table, A first molding groove is formed in the first region and the second region on the lower surface corresponding to the first mold portion, respectively, and the first molding groove is formed in the first region and the second region, And a second molding part formed at a boundary between the first molding part and the second molding part and a second molding part formed at a boundary between the first molding part and the second molding part, The second resin is injected into the second molding groove where the semi-manufactured article is placed when the first mold part moved to the first area or the second area is in close contact with the second mold part to form the finished article And an injection part.

A positioning pin is protruded from the upper surface of the first mold part and a positioning groove is formed in the lower surface of the second mold part so that the positioning pin is inserted into the lower surface of the second mold part when the first positioning part is in close contact with the first mold part, It is preferable that the pin is moved to the first area or the second area of the second mold part by the mold driving part and inserted into the positioning groove.

The resin injection portion may include a pair of first gates which are inserted through the upper surface of the second mold portion and inject the primary resin transferred from the first injection nozzle into the first molding grooves, A second gate penetrating through the upper surface of the second mold part and injecting the secondary resin transferred from the second injection nozzle into the second molding groove and a second gate injecting the discharge ports of the first gates into the opening / And a nozzle opening / closing unit for opening only one of the first gates.

In addition, the resin injecting unit may be connected to the first gates at both ends of the upper portion of the second mold unit, and may be connected to the first gates through the first gates, A first connection pipe and a second connection pipe which are disposed in a state separated from the first connection pipe, one end of the second mold part is connected to the second gate, And a second connection pipe for transferring the electric power to the second gate.

Preferably, the first connection pipe and the second connection pipe are disposed in a multi-layered structure so as to intersect at different heights.

In addition, one or more first injection ports may be formed at the upper end of the first connection pipe so that the primary resin may be transferred from the first injection port nozzle, and when a plurality of the first injection ports are formed, And a second injection port is formed at the upper end of the second connection pipe so that the secondary resin is transferred from the second injection nozzle.

In addition, the first injection nozzle may be slanted in a direction opposite to the second injection nozzle, and an insertion groove may be formed at an upper end of the first injection port so that one end of the first injection nozzle is not slid when the ramp is inserted And an inclined surface corresponding to an inclination angle of the first injection plate nozzle is formed on one side of the insertion groove.

In the lower part of the first mold part, a pair of ejector parts are provided so as to be able to move up and down along the moving direction, and when one of the ejector parts is separated from the first mold part and the second mold part, Is taken out from the first mold part.

In addition, the table is provided with a pair of space blocks for respectively supporting the lower end in a direction perpendicular to the moving direction of the first mold part, and the lower part of the first mold part is positioned at a position So that the insertion portion is protruded.

According to another aspect of the present invention, there is provided a method of injection molding a disparate material, comprising: a primary mold moving step of moving a first mold section to a first area of a table; a pair of first molding grooves and a second molding groove A first injection step of injecting a primary resin into the first molding groove located in the first region to form a semi-finished product; A second mold moving step of moving the first mold section to a second area of the table, a second mold moving step of moving the first mold section and the second mold section, And a step of injecting the primary resin into the first molding groove located in the second region and injecting a secondary resin into the second molding groove to mold the finished product A second injection step, and a second injection step, A second mold separating step of separating the first mold and the second mold from each other and placing the semi-finished article and the finished article on the upper surface of the first mold section, respectively; and a step of separating the finished article from the upper surface of the first mold section using the ejector section, And a returning step of moving the part to the first area.

The present invention is characterized in that a semi-finished product is molded through a primary resin injection process in a mold and then a different resin is additionally molded on the outer surface of the semi-finished product through a position change and a secondary resin injection process, So that the primary molding and the secondary molding can be carried out through a single process, so that the molding can be continuously performed.

Further, by forming the insertion groove corresponding to the ejection port of the ejection port nozzle in the injection port into which the resin is injected, even if the installation position of the ejection port nozzle is changed, the position of the ejection port is not changed, As shown in Fig.

The present invention is also directed to a method of manufacturing a semiconductor device, the method comprising: positioning the first mold portion and the second mold portion using a positioning pin so that the first and second mold portions move in the first and second regions, So that the molding error can be minimized.

1 is a front sectional view for showing an injection molding apparatus for dissimilar materials according to a first embodiment of the present invention.
2 is a side cross-sectional view showing an injection molding apparatus for dissimilar materials according to the first embodiment of the present invention.
3 is a side cross-sectional view showing another state of engagement between the table and the first mold part in the injection molding apparatus for dissimilar materials according to the first embodiment of the present invention.
4 is a plan view showing a first mold part in an injection molding apparatus for dissimilar materials according to the first embodiment of the present invention.
FIG. 5 is an enlarged view showing details of a first injection port, a second injection port, a first injection port nozzle, and a second injection port nozzle in an injection molding apparatus for dissimilar materials according to the first embodiment of the present invention.
6 is a perspective view showing a semi-finished product and an finished product manufactured by using the injection molding apparatus for different materials according to the first embodiment of the present invention.
7 is a perspective view showing a state in which a first connection pipe and a second connection pipe are applied in a multi-layer structure in an injection molding apparatus for dissimilar materials according to the first embodiment of the present invention.
FIG. 8 is a block diagram for sequentially illustrating the injection molding method of dissimilar materials according to the second embodiment of the present invention.
9 is a front sectional view for showing a primary mold moving step in the injection molding method of different materials according to the second embodiment of the present invention.
10 is a front sectional view for showing a primary mold coupling step and a semi-finished product molding step in the injection molding method of different materials according to the second embodiment of the present invention.
11 is a front sectional view for showing a primary mold separating step in the injection molding method of dissimilar materials according to the second embodiment of the present invention.
12 is a front sectional view showing a step of moving a secondary mold in the injection molding method of different materials according to the second embodiment of the present invention.
13 is a front sectional view for showing a secondary mold coupling step and an end product molding step in the injection molding method of different materials according to the second embodiment of the present invention.
FIG. 14 is a front sectional view for showing a secondary mold separation step in the injection molding method of different materials according to the second embodiment of the present invention.
Fig. 15 is a front sectional view for showing an article separation step in the injection molding method of dissimilar materials according to the second embodiment of the present invention.

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

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving it will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings.

The present invention may, however, be embodied in many different forms and should not be construed as 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 scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

In the following description, well-known functions or constructions are not described in detail to avoid obscuring the subject matter of the present invention.

FIG. 1 is a front sectional view for showing an injection molding apparatus for dissimilar materials according to a first embodiment of the present invention, FIG. 2 is a side sectional view for showing an injection molding apparatus for dissimilar materials according to a first embodiment of the present invention, to be.

3 is a side cross-sectional view for showing another engagement state of the table and the first metal mold in the injection molding apparatus for dissimilar materials according to the first embodiment of the present invention, and FIG. 4 is a cross- FIG. 5 is a plan view showing a first mold part in an injection molding apparatus for dissimilar materials. FIG.

FIG. 5 is an enlarged view showing the first injection port, the second injection port, the first injection port nozzle, and the second injection port nozzle in detail in an injection molding apparatus for dissimilar materials according to the first embodiment of the present invention.

6 is a perspective view showing a semi-finished product and an finished product manufactured by using the injection molding apparatus for dissimilar materials according to the first embodiment of the present invention, and FIG. 7 is a cross- FIG. 3 is a perspective view showing a state in which a first connection pipe and a second connection pipe are applied in a multilayer structure in a molding apparatus; FIG.

1 to 7, an injection molding apparatus for dissimilar materials according to a first embodiment of the present invention includes a table 100, a first mold part 200, a second mold part 300, And a resin injection unit 400.

First, the table 100 is installed in a work space, and a first mold part 200, which will be described later, is installed on the table 100 so as to be movable in both directions.

Here, the first region A and the second region B are formed adjacently on the table 100 so that the movement driving unit 300 can reciprocate continuously.

The table 100 may be provided with a pair of space blocks 110 for respectively supporting lower ends of the first mold part 200 in a direction perpendicular to the moving direction of the first mold part 200, respectively.

An installation space 120 is formed between the space blocks 110 so that the ejector 240 can be installed.

A guide rail 130 for guiding the first mold part 200 to be described later to the first area A and the second area B may be further provided on a corresponding one surface of the space blocks 110 have.

The guide rail 130 may be installed to have a length along the moving direction of the first mold part 200, which will be described later.

2 and 3, the installation space 120 may further include a horizontal bar 140 to horizontally support the spaces between the space blocks 110. As shown in FIG.

The first mold part 200 is installed so as to be reciprocally movable in the first area A and the second area B formed on the upper surface of the table 100.

Here, the first mold part 200 may be provided so as to be in close contact with and separate from a second mold part 300, which will be described later, and the second mold part 300 will be described later.

2, the insertion part 220 may be formed at the lower end of the first mold part 200. The insertion part 220 may be formed in the installation space 120 formed between the space blocks 110, Can be inserted.

At this time, the side surface of the insertion portion 220 may be guided to the first region A and the second region B in a state in which the side surface of the insertion portion 220 is in close contact with the corresponding surface between the space blocks 110.

Since the upper surface of the first mold part 200 is exposed to the outside, the working area of the first mold part 200 can be increased.

The table 100 includes a mold driving unit 230 for reciprocally moving the first mold unit 200 to the first area A and the second area B,

The mold driving unit 230 may be a hydraulic or pneumatic cylinder in which the rod protrudes and retracts in the front end, and the rod of the cylinder may be connected to the first mold unit 200.

Here, the cylinder may be installed horizontally on the table 100, and the front end of the cylinder may be located in the installation space 120 of the table 100.

In this state, the first mold part 200 can be selectively positioned in the first area A and the second area B as the rod of the cylinder projects sideways.

On the upper surface of the first mold part 200, one of the first molding grooves 310 and a molding surface 210 located below the second molding groove 320 are formed.

Here, the forming surface 210 may be formed horizontally, but may be formed with grooves into which the primary resin S1 and the secondary resin S2 can be injected.

In addition, a pair of ejector portions 240 may be installed on the lower portion of the first mold portion 200 so as to be movable along the moving direction.

When the first mold part 200 and the second mold part 300 to be described later are separated from each other, any one of the ejector parts 240 is lifted up to a second molding groove to be described later, 1 mold part 200 as shown in FIG.

That is, the ejector part 240 located in the first area A operates when the first mold part 200 is located in the first area A and the ejector part 240 located in the second area B 240 operate when the first mold part 200 is located in the second area B. [

The ejector portions 240 may be provided as an ejector pin 241, an ejector plate 242, and an ejector lift driving portion 243.

The ejector pin 241 may be disposed in an installation space 120 formed in the table 100 and the ejector pin 241 may be vertically arranged to have a length in the vertical direction.

The ejector pin 241 may be vertically installed at a position of the molding surface 210 formed in the first mold part 200. The ejector pin 241 may be inserted into the mold cavity by a driving force of the injector lifting / And can be moved upward or downward.

For example, when the ejector pin 241 is lifted, the upper end of the ejector pin 241 may push up the lower end of the finished product S upward to be separated from the molding surface 210.

The ejector pins 241 are provided in the moving direction of the first mold part 200 and are lifted up and down on the molding surfaces 210 formed in the first area A and the second area B .

The ejector plate 242 can be positioned in the installation space 120 formed in the table 100 and the ejector plate 242 can be moved up and down by the injector lifting and driving unit 243.

For example, when the ejector plate 242 is lifted by the ejector lifting / driving unit 243, the ejector pin 241 is raised together with the upper end of the ejector pin 241 to the upper side of the molding surface 210 It can be protruded.

The ejector lifting and driving unit 243 lifts the ejector plate 242 located in the installation space 120 in a state where the first mold unit 200 and the second mold unit 300 are separated from each other, 200 can be separated from the molding surface 210 of the finished product S.

Here, the injector lifting and lowering driving unit 243 may be a hydraulic or pneumatic cylinder in which the rod protrudes and retracts in the front end, and the cylinder may be vertically installed in the lower part of the table 100.

In this state, the rod protruding and retracted to the upper portion of the cylinder can raise or lower the ejector plate 242 to a set height.

A positioning pin 250 may be formed on the upper surface of the first mold part 200 and the positioning pin 250 may be formed on the positioning groove 360 of the second mold part 300, So that the position of the first mold part 200 can be prevented from changing even if the first mold part 200 alternately moves between the first area A and the second area B.

For example, when the first mold part 200 is in close contact with the second mold part 300 in the first area A or the second area B, the first mold part 200 and the second mold part 300, It is possible to prevent the position of the unit 300 from being changed.

The second mold part 300 is installed so as to be in close contact with and separable from the upper surface of the first mold part 200 moved to the first area A and the second area B.

A first molding groove 310 is formed in a first area A and a second area B on the lower surface of the second mold part 300. A first molding area 310 is formed in the first area A and a second area B, The second forming groove 320 is formed at the boundary between the first and second molding grooves.

A first resin S1 is injected into the first molding grooves 310 through a resin injection part 400 to be described later and the open lower part of the first molding grooves 310 is inserted into the first mold part 200, It is possible to block the lower part by the above.

That is, the first molding grooves 310 are filled with the primary resin S1, and the semi-finished products are molded. The shape of the first molding grooves 310 can be variously applied according to the shape of the semi-finished product to be manufactured Do.

At this time, the molded semi-finished product may have a connecting portion protruding to the side portion as shown in FIG. 6, and a secondary resin S2 described later may be coupled to the upper portion of the connecting portion.

4, the first forming grooves 310 may be formed in parallel to the moving direction of the first mold 200.

The first forming grooves 310 may be formed in the same or symmetrical or different shapes with respect to the center line C of the first mold part 200.

The second forming groove 320 is formed at the boundary between the first region A and the second region B formed on the upper surface of the table 100. The center of the second forming groove 320 is a (C) of the mold part (300).

Here, the second molding groove 320 is filled with a secondary resin S2 through a resin injection part 400 to be described later, and the open lower part of the second molding groove 320 is formed on the molding surface 210 Lt; / RTI >

The second molding groove 320 is filled with a secondary resin S2 in a state where the semi-finished product is positioned therein. At this time, a semi-finished product and a secondary resin S2 are formed in the second molding groove 320 The finished article S molded integrally is molded.

At this time, the finished product S may be made of a single molded product in which a transparent resin and a red resin are combined, and the color and shape of the finished product S may be the same as that of the primary resin S1 and the secondary resin S2 The shape of the first molding groove 310 and the shape of the second molding groove 320, as shown in FIG.

Since the secondary resin S2 is coupled to the upper portion of the connection portion formed in the semi-finished product, the injection terminal or the like formed on the connection portion is not exposed to the outside.

The first molding grooves 310 and the second molding grooves 320 may be formed in parallel to the moving direction of the second mold part 200 as shown in FIG.

The first molding grooves 310 and the second molding grooves 320 may be formed in the same or symmetrical shape or different shapes with respect to the center line C of the second mold portion 300 .

Of course, the arrangement of the first molding grooves 310 and the second molding grooves 320 may be variously set as needed, and the first molding grooves 310 and the second molding grooves 320 may be formed as desired, It is also possible to apply various sizes.

The positioning groove 360 may be formed on the lower surface of the second mold part 300 so that the positioning pin 250 may be inserted into the lower surface of the second mold part 300 when the first mold part 200 is in close contact with the first mold part 200.

When the first mold part 200 and the second mold part 300 are in close contact with each other, the positioning groove 360 corresponds to the position of the first mold part 200 Can be prevented from being changed.

In addition, the first mold part 200 or the second mold part 300 may further include a mold closing and opening device (not shown) for mutual contact and separation.

For this purpose, the first mold part 200 or the second mold part 300 may be provided with a guide groove 330 for connecting the guide pins 350 therethrough.

When the first mold part 200 is in close contact with the second mold part 300, the resin injection part 400 injects the primary resin S1 into any one of the first molding grooves 310, .

When the first mold part 200 moved to the first area A or the second area B is brought into close contact with the second mold part 300, the resin injection part 400 inserts the second mold part 300, The secondary product S2 is injected into the molding groove 320 to mold the finished product S.

The injector 400 may include a pair of first gates 410, a second gate 420, and a nozzle opening / closing unit 430.

The first gates 410 are inserted through the upper surface of the second mold part 300 and the first gates 410 are connected to the first molding groove 310, Lt; / RTI >

The first gates 410 may be inclined according to the shape of the outer surface of the vertical or finished product S and may be formed at the lower end of the first gates 410, Can be formed.

Both ends of a first connection pipe 440, which will be described later, are connected to the upper portions of the first gates 410 to transfer the primary resin S1.

The second gate 420 penetrates through the upper surface of the second mold part 300 and the second gate 420 connects the secondary resin S2 transferred from the outside to the second molding groove 320 Inject.

The second gate 420 penetrates through the upper surface of the second mold part 300 and the second gate 420 connects the second resin S2 to the second molding groove 320 ).

The second gates 420 may be vertically or inclined, and a discharge port may be formed at a lower end of the second gates 420 to penetrate the upper portion of the second molding groove 320.

Further, both ends of the second connection pipe (to be described later) are connected to the upper portions of the second gates 420, so that the secondary resin S2 can be transferred.

The nozzle opening and closing unit 430 selectively opens and closes the discharge ports of the first gates 410 so that only one of the first gates 410 is opened.

The nozzle opening / closing part 430 may include an opening / closing pin 431 and a pin driving part 432.

The opening / closing pin 431 is installed in the first gates 410 so as to be movable from the upper opening position to the lower blocking position.

The pin driving portion 432 is for moving the opening and closing pin 431 upward and downward and moves the opening and closing pin 431 to the cutoff and open position to open only one of the first gates 410.

Here, the pin driving unit 432 may be coupled to the upper end of the opening / closing pin 431, and the pin driving unit 432 may be installed in the second mold unit 300.

The pin driving unit 432 can selectively use a cylinder, a solenoid, or the like in which the rod connected to the opening / closing pin 431 moves in and out.

When the first mold part 200 and the second mold part 300 are in close contact with each other in the first area A or the second area B, Any one of the opening / closing pins 431 located in the inside is lowered to block the lower discharge port of the first gate 410.

The resin injection unit 400 may be provided with a first connection pipe 440 for transferring the primary resin S1 and a second connection pipe 450 for transferring the secondary resin S2 .

The first connection pipe 440 may be horizontally disposed on the upper portion of the second mold part 300 and both longitudinal ends of the first connection pipe 440 may be connected to the first gates 410 .

The first connection pipe 440 transmits the primary resin S1 delivered from the resin supply unit (not shown) to the first gates 410, respectively.

One or more first injection ports 441 are formed in the upper end of the first connection pipe 440 so that the primary resin S1 is transferred from the first injection nozzle 460.

The second connection pipe 450 is disposed on the upper portion of the second mold part 300 while being separated from the first connection pipe 440. One end of the second connection pipe 450 is connected to the second gate 420 .

The second connection pipe 450 transfers the secondary resin S2 transferred from the resin supply unit to the second gate 420.

A second injection port 451 may be formed on the upper end of the second connection pipe 450 to allow the secondary resin S2 to be transferred from the second injection nozzle 470.

The first connection pipe 440 and the second connection pipe 450 may be arranged in a multi-layered manner so as to intersect at different heights as shown in FIG.

The resin injection unit 400 may further include a first injection nozzle 460 and a second injection nozzle 470 for injecting the primary resin S1 into the first injection hole 441 .

The first injection nozzle 460 injects the primary resin S1 into the inner flow path of the first injection port 441 at the upper end of the first injection port 441. [

The primary resin S1 injected into the internal flow path of the first injection port 441 is connected to the first molding groove 310 through one of the first gates 410 along the first connection pipe 440, Lt; / RTI >

The second injection nozzle 470 injects the secondary resin S2 at the upper end of the second injection port 451 into the inner flow path of the second injection port 451. [

At this time, the secondary resin S2 injected into the inner flow path of the second injection port 451 is injected into the second molding groove 320 through the second gate 420 along the second connection pipe 450.

Meanwhile, a plurality of the first injection ports 441 may be formed. In this case, only one of the first injection ports 441 may be selectively used.

For example, in the case where the first injection port 441 is formed at two positions of 150 mm and 250 mm from the second injection port 451, the distance between the second injection port nozzle 470 and the injection port 450 You can use only one of them by choosing one of them closed.

In addition, the first injection nozzle 460 may be inclined in a direction opposite to the second injection nozzle 470.

5, an insertion groove 441a such as a curved surface or a hemispherical shape may be formed so that one end of the first injection nozzle nozzle 460 is inserted into the first injection hole 441. [

At this time, an inclined surface 441b corresponding to the inclination angle of the first injection nozzle 460 may be formed on one side of the insertion groove 441a.

That is, one end of the first injection nozzle 460 is inserted into the insertion groove 441a, so that even if the position of the first injection nozzle 460 is changed, As shown in Fig.

Since the insertion groove 441a is formed concavely, it is possible to prevent the primary resin S1 from overflowing to the outside.

Hereinafter, an injection molding method of a dissimilar material according to a second embodiment of the present invention will be described as follows, and the same configurations as those described above will not be repeatedly described.

8 to 15, the injection molding method for different materials according to the second embodiment of the present invention includes a primary mold moving step (S100), a primary mold coupling step (S200), a primary injection step (S300), a primary mold separation step (S400), a secondary mold moving step (S500), a secondary mold coupling step (S600), a secondary injection step (S700), a secondary mold separation step S800), and an article separation step (S900).

First, the primary die movement step S100 moves the first mold part 200 to the first area A or the second area B of the table 100.

9, in the primary mold moving step S100, the mold driving unit 230 is driven in a state where the first mold unit 200 and the second mold unit 300 are separated from each other, (200) to the first area (A) of the table (100).

At this time, the molding surfaces 210 of the first mold part 200 are positioned at the boundary between the first molding area 310 and the first area A and the second area B, And is located on the same line as the second molding groove 320 positioned.

The first mold coupling step S200 includes a second mold part 300 having a pair of first molding grooves 310 and a second molding groove 320 formed on the lower surface thereof, 200).

As shown in FIG. 10, in the primary mold coupling step (S200), the first mold part 200 and the second mold part 300 are brought into close contact with each other using the mold closing function of the injection molding machine.

At this time, the first molding groove 310 located in the first region A and the second molding groove 320 positioned at the boundary between the first region A and the second region B are formed in the first mold portion (210) of the mold (200).

In this state, the open lower ends of the first molding groove 310 and the second molding groove 320 are blocked by the molding surface 210 to form a sealed injection space, respectively.

When the first mold part 200 is in close contact with the second mold part 300, the first molding step S300 is performed by injecting the primary resin S1 into any one of the first molding grooves 310 Thereby forming a semi-finished product.

In the first injection step S300, the primary resin S1 transferred to the resin injection unit 400 is injected into the first molding groove 310 located in the first region A to mold a semi-finished product .

At this time, the first injection step S300 may include a step of cooling the semi-finished product for a preset time.

11, in the first injection step S300, the primary resin S1 is transferred from the resin supply unit (not shown) to the first injection nozzle 460, and the first injection nozzle 460 injects the primary resin S1 into the internal flow path of the first injection port 441. [

At this time, the primary resin S1 injected into the first injection port 441 is transferred to the first gate 410 along the first connection pipe 440.

In addition, the first injection step S300 may further include an opening / closing step (not shown) for selectively closing one of the first molding grooves 310 that is not used by using the nozzle opening and closing part 430. [

That is, by closing the first gate 410 located in the second region B by using the nozzle opening / closing unit 430, only the first molding groove 310 located in the first region A S1) can be injected.

10, the first mold part 200 and the second mold part 300 are separated from each other. At this time, the semi-finished product is positioned on the upper surface of the first mold part 200 .

Next, in the secondary mold moving step S500, the first mold part 200 is moved to the second area B of the table 100.

12, in the secondary mold moving step S500, the mold driving unit 230 is driven in a state where the first mold unit 200 and the second mold unit 300 are separated from each other, (200) to the second area (B) of the table (100).

At this time, the molding surfaces 210 of the first mold part 200 are located at the boundary between the first molding area 310 and the first area A and the second area B located in the second area B, And is located on the same line as the second molding groove 320 positioned.

Next, in the secondary mold coupling step S600, the mold closing function of the injection machine is reused to bring the first mold part 200 and the second mold part 300 into close contact with each other.

At this time, the first molding groove 310 located in the second region B and the second molding groove 320 located at the boundary between the first region A and the second region B are formed in the first mold portion 310, (210) of the mold (200).

13, in the secondary mold coupling step S600, the lower open ends of the first molding groove 310 and the second molding groove 320 are blocked by the molding surface 210, Respectively.

Next, in the second injection step S700, when the first mold part 200 is in close contact with the second mold part 300, the secondary resin S2 is injected into the second molding groove 320, Thereby bonding the secondary resin (S2).

In the second injection step S700, the secondary resin S2 injected into the resin injection part 400 is injected into the second molding cavity 320, and the finished product with the secondary resin S2 coupled with the semi-finished product S are formed.

At this time, the second injection step S700 may include a step of cooling the finished product for a preset time.

In addition, before the secondary injection step S700, the nozzle opening and closing part 430 may be used to further open and close one of the first forming grooves 310 selectively.

14, in the secondary injection step S700, the primary resin S1 is transferred from the resin supply unit (not shown) to the first injection nozzle nozzle 460, and the second injection nozzle nozzle 470). &Lt; / RTI >

The first injection nozzle 460 injects the primary resin S1 into the internal flow path of the first injection hole 441 and the second injection nozzle 470 injects the secondary resin (S2).

At this time, the primary resin S1 injected into the first injection port 441 is transferred to the first gate 410 along the first connection pipe 440, The resin S1 is filled in the first molding groove 310 through the lower discharge port of the first gate 410.

At the same time, the secondary resin S2 injected into the second injection port 451 flows into the second gate 420 along the second connection pipe 450 and flows into the second gate 420, The resin S2 is filled in the second molding groove 320 through the lower discharge port of the second gate 420. [

In addition, the secondary injection step S700 may further include an opening / closing step (not shown) for selectively closing one of the first gates 410 that is not used by using the nozzle opening / closing part 430. [

That is, by closing the first molding groove 310 located in the first region B by using the nozzle opening / closing unit 430, only the first molding groove 310 located in the second region B can be closed (S1) can be injected.

Next, in the secondary mold separation step S800, the first mold part 200 and the second mold part 300 are separated. In the secondary mold separation step S800 as shown in FIG. 13, (Not shown) to separate the first mold part 200 and the second mold part.

In this state, the semi-finished product molded in the first molding groove 210 and the finished product S molded in the second molding groove 220 are placed on the molding surfaces 210 of the first mold part 200, do.

Finally, in the final product separation step S900, the ejected product 240 is used to separate the finished product S from the upper surface of the first mold part 200.

In the final product separation step S900, the finished product S molded in the second molding groove 320 is separated from the upper surface of the first mold part 200 by using the ejector part 240.

As shown in FIG. 15, in the final product separating step (S900), the ejector lifting and driving unit 243 is raised to push up the ejector plate 242 to a predetermined height.

The ejector pin 241 connected to the upper end of the ejector plate 242 pushes up the lower end of the finished product S placed on the molding surface 210 to be separated from the first mold part 200.

In this state, since the finished product S is located in a state separated from the first mold part 200, the finished product S can be easily separated.

Finally, after the final product separation step S900, a return step (not shown) for moving the first mold part 200 to the first area A of the table 100 may be further included.

Hereinafter, another method of the injection molding method of different materials according to the second embodiment of the present invention will be described.

When the first mold part 200 is in close contact with the second mold part 300, the first resin S1 is injected into the second molding groove 320, So that the semi-finished product can be formed.

In addition, in the second injection step S700, the primary resin S1 is injected into the second molding groove 320 and the secondary resin S2 is injected into the first molding groove 310 The finished product S can be molded.

That is, after injecting the primary resin S1 into the second molding groove 320 to mold the semi-finished product, the secondary resin S2 is injected into the first molding groove 310 in which the semi- , The finished product S can be positioned at the outer periphery of the first mold part 100. [

The finished product S completed in this way is formed by extending a certain area of about half the thickness on the side surface of the semi-finished product, having an injection port on the surface thereof, and having a form in which a dissimilar resin is additionally molded on the outer surface of the semi-finished product, The injection station formed in the injection molding process can be prevented from being exposed to the outside.

As a result, in the present invention, a semi-finished product is molded through a primary resin injection process in a mold, and then a heterogeneous resin is additionally formed on the outer surface of the semi-finished product through a position change and a secondary resin injection process, Since the injection station formed in the injection step of the resin (S1) is not exposed to the outside, the appearance is good, and the primary molding and the secondary molding can be performed through one step, and continuous molding is possible.

According to the present invention, by forming the first injection port 441 into which the resin is injected and the insertion hole 441a corresponding to the ejection port of the nozzle in the second injection port 451, even if the installation position of the nozzle is changed, And the resins S1 and S2 injected through the nozzles do not flow out to the outside.

The position of the first mold part 200 and the second mold part 300 is fixed by using the positioning pin 250 so that the first mold part 200 and the second mold part 300 300 are not changed, the molding error can be minimized.

Although the present invention has been described with respect to particular embodiments about the injection molding apparatus and method for dissimilar materials according to the present invention, it is apparent that various modifications can be made without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

It is to be understood that the foregoing embodiments are illustrative and not restrictive in all respects and that the scope of the present invention is indicated by the appended claims rather than the foregoing description, It is intended that all changes and modifications derived from the equivalent concept be included within the scope of the present invention.

100: Table 110: Space block
120: installation space 130: guide rail
140: horizontal bar 200: first mold part
210: molding surface 220:
230: mold drive unit 240: ejector unit
241: Ejector pin 242: Ejector plate
250: positioning pin 300: second mold part
310: first molding groove 320: second molding groove
330: guide groove 350: guide pin
360: positioning groove 400: resin injection part
410: first gate 420: second gate
430: nozzle opening / closing part 431: opening /
432: pin driver 440: first connector
441: first inlet 441a: insertion groove
441b: slope 450: second connection pipe
451: second injection port 460: first injection nozzle
470: Second injection nozzle Nozzle A: First area
B: second region C: center line
S: Finished product S1: Primary resin (semi-finished product)
S2: Secondary resin

Claims

A first mold part installed to be reciprocally movable in a first area and a second area formed on an upper surface of the table;
Wherein the first mold section and the second mold section are provided so as to be in close contact with and separated from the upper surface of the first mold section moved to the first area or the second area, A second mold part in which a second molding groove is formed at a boundary between the first area and the second area; And
Wherein the first mold part is formed by injecting a primary resin into one of the first molding grooves when the first mold part is in close contact with the second mold part to form a semi-finished product, And a resin injection unit for injecting a secondary resin into the second molding groove in which the semifinished product is placed when the second semifinished product is in close contact with the second mold unit to form an article.

The method according to claim 1,
On the upper surface of the first mold part,
The positioning pin is protruded,
On the lower surface of the second mold part,
A positioning groove is formed so that the positioning pin is inserted when the positioning tool is closely contacted with the first mold part, the positioning pin is moved to the first area or the second area of the second mold part by the mold driving part, Wherein the injection port is inserted into the groove.

The method according to claim 1,
The resin-
A pair of first gates penetrating through the upper surface of the second mold part and injecting the primary resin transferred from the first injection nozzle into the first molding grooves,
A second gate penetrating through the upper surface of the second mold part and injecting the secondary resin transferred from the second injection nozzle into the second molding groove,
And a nozzle opening and closing unit for selectively opening and closing the opening and closing pins by using a pin driving unit to open the discharge ports of the first gates to open only one of the first gates.

The method of claim 3,
In the resin injection portion,
A first connection pipe connected to the first gates at both ends of the upper portion of the second mold unit and transmitting the primary resin transferred from the first injection nozzle to the first gates,
One end of the second mold part is connected to the second gate so that the secondary resin transferred from the second injection nozzle is transferred to the second gate And a second connection pipe for connecting the first and second connection pipes to each other.

The method of claim 4,
Wherein the first connection pipe and the second connection pipe are connected to each other,
And are arranged in multiple layers so as to intersect at different heights.

The method of claim 4,
At the upper end of the first connection pipe,
One or a plurality of first injection ports are extended to transfer the primary resin from the first injection nozzle, and one of the first injection ports is selectively used when a plurality of the first injection ports are formed,
At the upper end of the second connection pipe,
And a second injection port is extended to transfer the secondary resin from the second injection nozzle.

The method of claim 6,
Wherein the first ejection opening nozzle
The first ejection nozzle may be provided with an inclination in a direction opposite to the second ejection nozzle,
At an upper end of the first injection port,
Wherein an injection groove is formed so that one end of the first injection nozzle is not slid when inserting a ramp, and an inclined face corresponding to an inclination angle of the first injection nozzle is formed on one side of the insertion groove. Device.

The method according to claim 1,
In the lower portion of the first mold portion,
A pair of ejector sections are provided so as to be able to move up and down along the moving direction,
Wherein one of the ejector portions comprises:
And when the first mold part and the second mold part are separated, the second mold part is lifted to take out the finished article from the first mold part.

The method according to claim 1,
In the table,
And a pair of space blocks for respectively supporting the lower side in the direction perpendicular to the moving direction of the first mold part,
And a second mold part,
Wherein the insertion portion is protruded and formed so as to be positioned in a state of being inserted between the space blocks.

A primary mold moving step of moving the first mold section to a first area of the table;
A first mold coupling step of placing a second mold part having a pair of first molding grooves and a second molding groove formed on the lower surface thereof in close contact with the first mold part;
A first injection step of injecting a primary resin into the first molding groove located in the first region to form a semi-finished product;
A first mold separation step of separating the first mold part and the second mold part;
A second mold moving step of moving the first mold section to a second area of the table;
A second mold coupling step of placing the second mold part and the first mold part in close contact with each other;
A second injection step of injecting the primary resin into the first molding groove located in the second region and injecting a secondary resin into the second molding groove to form an article;
A second mold separating step of separating the first mold part and the second mold part to place the semifinished product and the finished product on the upper surface of the first mold part, respectively;
An article separation step of taking out the article from the upper surface of the first mold part using an ejector part; And
And returning the first mold part to the first area.