KR101721001B1 - Apparatus for supplying resin for testing injection molding and injection molding therewith - Google Patents

Abstract

Disclosed is a resin supply apparatus for injection molding test and an injection molding apparatus having the same. The disclosed invention is characterized in that: the movable mold is provided with: a fixed side cavity provided between the fixed side mold and the movable side mold and selectively connected to at least one of the plurality of cavities formed by connecting the movable side cavity formed in the movable side mold A sprue bush in which a connecting passage is formed; And a resin supply rod connected to the sprue bushing through the fixed-side mold and connected to the connection flow path to supply a resin to the connection flow path, wherein one side of the movable side mold facing each other, A mounting portion into which the sprue bush is inserted is formed in a concave shape corresponding to the shape of the sprue bush, and the sprue bush is inserted into the mounting portion and is provided so as to be positionally changeable between the fixed side mold and the movable side mold , The connection channel is connected to at least one of the plurality of cavities, which is disconnected from the at least one of the plurality of cavities and is not connected, when the position of the sprue bushing is changed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a resin feeding device for an injection molding test, and an injection molding device having the resin feeding device.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin supply apparatus for injection molding test and an injection molding apparatus having the same, and more particularly to a resin supply apparatus for injection molding test, which is used for testing an injection- To an injection molding apparatus.

Generally, molding of a semiconductor chip package or an LED package uses an injection method in which a resin material softened in a heating chamber is injected into a cavity of a mold through a runner and a gate, and then hardened.

Injection molding is a processing method of forming a molded product by injecting a resin melted by heating into a mold to solidify or harden the resin to form a molded product. The injection molding process is performed by extrusion molding and thermoplastic resin (thermoplastic resin) Which is one of the important molding methods. In addition to complicated industrial parts such as televisions and radios, cabinets, switches and lighting fixtures, various other products are also produced through injection molding.

In recent years, injection molding methods have been applied even when precise molded articles having high precision such as a video disk, a lens for glasses, and a camera lens are manufactured through program control on injection pressure, injection speed and plasticizing condition.

In the injection molding machine for molding such a resin molded article, one or a plurality of cavities are provided between the stationary mold and the movable mold.

In the resin molding using an injection molding machine, a molten resin injected from a nozzle of an injection molding machine is filled into a cavity of a mold from a nozzle touch of a stationary mold through a sprue and is molded into a predetermined shape. After the molten resin is cooled and solidified, And separating the fixed mold and the movable mold to take out the molded article from the cavity.

The shape of the molded resin article thus molded and the accuracy of the surface layer are determined by the shape of the inner circumferential surface of the cavity and the surface precision, and if the cavity of the injection molding machine is scratched, the scratches appear on the surface of the resin molded article.

Therefore, it is required to perform a check on the state of the cavity of the injection molding machine before the resin molded product is fully produced using the injection molding machine.

Prior art relating to the present invention is Korean Patent Publication No. 10-2014-0050337 (published on April 29, 2014), which discloses an injection molding apparatus.

An object of the present invention is to provide a resin feeding device for injection molding test which can effectively test an injection molding state performed by an injection molding machine and an injection molding device having the same.

According to one aspect of the present invention, there is provided a resin supply apparatus for injection molding test, comprising: a fixed-side cavity formed between a stationary-side mold and a movable-side mold and connected to the stationary-side cavity formed in the stationary- A sprue bush in which a coupling flow path selectively connected to at least one of a plurality of cavities to be formed is formed; And a resin supply rod which is coupled to the sprue bushing through the fixed-side mold and is connected to the connection passage to form a supply passage for supplying the resin to the connection passage, Wherein the mounting portion for inserting the sprue bush is formed in a concave shape corresponding to the shape of the sprue bush, and the sprue bush is inserted into the mounting portion, And the movable duct is disposed so as to be positionally changeable between the movable molds, and when the position of the sprue bush is changed, at least one of the plurality of cavities is disconnected from the connected one and is not connected A connection with one is made.

Preferably, the sprue bushing is formed to include a polygonal columnar shape having a plurality of contact surfaces along a direction in which the plurality of cavities are arranged, and the position of the sprue bushing is changed along the arrangement direction of the contact surfaces.

The sprue bush may further include a first bush portion inserted into the mounting portion and detachably attached to the stationary side mold and having a first flow path groove forming a part of the connection path; And a second bushing portion which is inserted into the mounting portion and is detachably mounted to the movable mold, is detachably coupled to the first bushing portion along a moving direction of the movable mold, And a second bushing portion in which a second flow path groove for forming the connection flow path is formed.

The first bush portion may be formed with a fitting hole into which the resin supply rod is fitted; It is preferable that the resin supply rod is inserted into the sprue bush through the fitting hole so that the supply passage and the connection passage are connected to each other.

The resin supply rod is inserted into the mounting portion through the stationary-side mold, one side of which is coupled to the sprue bush, the supply passage is formed inside, and a connection hole for connecting the supply passage to the connection passage is formed ; And a nozzle coupling part formed on the other side of the insertion part exposed on the other side of the stationary-side metal mold and seated on the other side of the stationary-side mold, the mounting part for recessing the nozzle for supplying resin to the supply passage recessed And the like.

In addition, it is preferable that a position indicating portion for indicating the position of the connection hole and the connection passage is formed in the nozzle coupling portion.

According to another aspect of the present invention, there is provided an injection molding apparatus comprising: a stationary-side mold including a stationary-side mold plate and a plurality of stationary-side cavities formed at one side of the stationary-side mold plate; And a plurality of movable side cavities formed on one side of the movable side mold plate facing the fixed side mold plate, wherein a plurality of the fixed side cavities and the movable side cavities are connected to each other, A movable-side mold for forming a plurality of cavities for molding; And a resin supply device for injection molding test, which is installed so as to be selectively connected to at least one of the plurality of cavities and supplies the resin to the cavity, and which is positionally changeable in the fixed side mold and the movable side mold And the resin supply device for injection molding test is provided between the stationary side mold and the movable side mold and has a plurality of openings formed in the fixed side cavity and the movable side cavity formed in the movable side mold, A sprue bush in which a connection flow path selectively connected to at least one of the cavities is formed; And a resin supply rod which is coupled to the sprue bushing through the fixed-side mold and is connected to the connection passage to form a supply passage for supplying the resin to the connection passage, Wherein the mounting portion for inserting the sprue bush is formed in a concave shape corresponding to the shape of the sprue bush, and the sprue bush is inserted into the mounting portion, And the movable duct is disposed so as to be positionally changeable between the movable molds, and when the position of the sprue bush is changed, at least one of the plurality of cavities is disconnected from the connected one and is not connected A connection with one is made.

It is preferable that the fixed-side mold is formed so that a through-hole forming a passage through which the resin-supplying rod is inserted from the other side of the stationary-side mold into the mounting portion is formed.

The sprue bushing is formed to include a polygonal columnar shape having a plurality of contact surfaces along a direction in which the plurality of cavities are arranged, the position of the sprue bushing being changed along an arrangement direction of the contact surfaces; The mounting portion is preferably recessed to include a polygonal column shape engaging with the sprue bush.

According to the injection apparatus for injection molding test of the present invention and the injection molding apparatus having the same, only the cavity to be tested can be selected and checked to check and check the state of the injection molding, so that the injection molding state It is possible to effectively test it, and it is possible to reduce the waste of unnecessary resin in the test process.

In addition, the present invention can be easily detachably mounted on a metal mold while being removably coupled to each other, such as a sprue bush and a resin supply rod, which constitute a resin supply device for injection molding test, In addition, it is easy to disassemble, assemble and replace, which makes maintenance easy and low maintenance cost.

1 is a perspective view showing an injection molding apparatus according to an embodiment of the present invention.
2 is an exploded perspective view showing an exploded state of an injection molding apparatus according to an embodiment of the present invention.
3 is a front sectional view showing a cross section of an injection molding apparatus according to an embodiment of the present invention.
4 is a view showing a shape of a movable mold and a second bush portion of an injection molding apparatus according to an embodiment of the present invention.
5 and 6 are views showing a change in the position of a resin supply device for injection molding test according to an embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a resin supply apparatus for injection molding test according to the present invention and an injection molding apparatus having the same will be described with reference to the accompanying drawings. For convenience of explanation, 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 perspective view showing an injection molding apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing an exploded state of an injection molding apparatus according to an embodiment of the present invention. FIG. 3 is a front sectional view showing a cross section of an injection molding apparatus according to an embodiment of the present invention, FIG. 4 is a cross-sectional view showing the shape of the movable mold and the second bush portion of the injection molding apparatus according to the embodiment of the present invention Fig.

1 to 4, an injection molding apparatus 400 according to an embodiment of the present invention includes a fixed side mold 100, a movable side mold 200, and a resin supply apparatus 300 for injection molding test .

The stationary-side mold 100 is formed to include the stationary-side mold plate 110 and the stationary-side cavity 120.

The stationary-side mold plate 110 is fixed to a nozzle (not shown) side to which the molten resin is injected, and a plurality of stationary-side cavities 120 Is formed.

In this embodiment, it is exemplified that a plurality of fixed side cavities 120 are radially arranged on one side of the fixed side mold plate 110.

The first mounting portion 130 may be formed in a center region of the fixed-side mold plate 110 surrounded by the plurality of fixed-side cavities 120 arranged radially.

The first mounting portion 130 is recessed on one side of the stationary-side mold plate 110 and has a concave shape including a polygonal column shape engaging with the first bush portion 320 of a sprue bush 310 .

The movable-side mold 200 is formed to include the movable-side mold plate 210 and the movable-side cavity 220.

The movable-side mold plate 210 is disposed at a lower portion of the stationary-side mold plate 110 so as to be parallel to the stationary-side mold plate 110 and movable in a direction close to or away from the stationary- Respectively.

A plurality of movable side cavities 220 are formed on one side of the movable side mold plate 210 facing the fixed side mold 100.

In this embodiment, it is exemplified that a plurality of movable side cavities 220 are formed radially on one side of the movable side mold plate 210.

When the fixed side mold plate 110 and the movable side mold plate 210 are engaged with each other to be engaged with each other, the fixed side cavity 120 formed in the fixed side mold plate 110, So that the cavity can be formed.

One cavity is formed through the fixed side cavity 120 and the movable side cavity 220 connected to each other in the vertical direction and the plurality of fixed side cavities 120 and the movable side cavities 220 arranged in the radial direction are arranged in the vertical direction So that a plurality of cavities can be radially arranged.

The second mounting portion 230 may be formed in a center region of the movable mold plate 210 surrounded by the plurality of movable side cavities 220 radially arranged as described above.

The second mounting portion 230 is recessed in one side surface of the movable mold plate 210 and has a concave shape including a polygonal column shape engaging with the second bush portion 330 of a sprue bush 310 .

When the stationary-side mold plate 110 and the movable-side mold plate 210 are engaged with each other, the second mounting portion 230 thus formed can be connected to the first mounting portion 130 to form a mounting portion.

The mounting portion formed in this manner is formed in a concave shape corresponding to the shape of the sprue bush 310 so that a space for inserting the sprue bushing 310 is formed between the fixed side mold plate 110 and the movable side mold plate 210, As shown in FIG.

The injection molding test resin supply device 300 is installed to be selectively connected to at least one of the plurality of cavities, and supplies the resin to the connected cavity. The resin supply device 300 for injection molding test is provided so as to be positionally changeable in the stationary-side mold 100 and the movable-side mold 200, so that the cavity to be a resin supply target can be changed Respectively.

According to the present embodiment, the resin supply apparatus 300 for injection molding test includes a sprue bush 310 and a resin supply rod 350.

The sprue bush 310 is installed in a mounting portion where the first mounting portion 130 and the second mounting portion 230 are connected between the stationary-side mold 100 and the movable-side mold 200, or more specifically,

The sprue bushing 310 is formed with a connecting passage c. The connection channel c is selectively connected to at least one of the plurality of cavities and forms a flow path for transferring the resin supplied through the resin supply rod 350 to be described later to the cavity.

That is, when the sprue bush 310 is inserted into the mounting portion and installed in the mold 100 or 200, the connection flow path c may be connected to at least one of the plurality of cavities to supply the resin to the cavity.

In this embodiment, one connection path (c) is formed in the sprue bushing (310) to supply resin to one cavity. However, the present invention is not limited thereto.

According to the present invention, there may be various modified embodiments, such that at least two connection flow paths c are formed in the sprue bush 310, and the resin may be supplied to two or more cavities at the same time.

Meanwhile, the sprue bushing 310 may include a first bushing 320 and a second bushing 330.

The first bushing 320 forms an upper half of the sprue bushing 310 and is inserted into the mounting portion, more specifically, the first mounting portion 130, Respectively. A first flow path groove 321 for forming a part of the connection flow path c is formed on one side of the first bushing portion 320 facing the second bush portion 330.

The second bushing 330 is a lower half portion of the sprue bushing 310 and is inserted into the mounting portion or more specifically the second mounting portion 230 to be detachably attached to the movable side mold 200 Respectively. A second flow path groove 331 is formed on one side of the second bushing 330 facing the first bushing 320 to form a remaining portion of the connection flow path c.

When the fixed side mold plate 110 and the movable side mold plate 210 are engaged with each other, the first and second bush portions 320 and 330 can be engaged with each other, The one flow path groove 321 and the second flow path groove 331 are connected to each other to form the connection flow path c.

The sprue bush 310 formed by connecting the first bushing 320 and the second bushing 330 as described above is disposed in a direction in which a plurality of cavities are arranged, The movable mold plate 210 is formed to include a polygonal columnar shape having a plurality of contact surfaces along the plane direction of the movable mold plate 210 and can be positioned inside the molds 100 and 200 along the arrangement direction of the contact surfaces. That is, a plurality of contact surfaces are arranged along the direction in which the cavities are arranged on the outer circumferential surface of the sprue bush 310 formed by the polygonal column, and the respective contact surfaces arranged in this manner are in the state in which the sprue bush 310 is inserted In order to view the cavities one by one.
The mounting portion to which the sprue bush 310 is inserted is formed in a concave shape corresponding to the shape of the sprue bush 310. The inner circumferential surface of the mounting portion is fitted to the contact surface of the sprue bush 310 The engaging surface is provided in a shape and number corresponding to the contact surface of the sprue bush 310. These engaging surfaces are formed on the inner circumferential surface of the mounting portion because the mounting portion is formed in a concave shape corresponding to the shape of the sprue bush 310. [

In this embodiment, the sprue bush 310 is formed in an octagonal column shape having eight contact surfaces, and the mounting portion is recessed to include an octagonal column shape engaging with the sprue bush 310 thus formed. do.
The sprue bushing 310 is detachably inserted into the mounting portion in a state where the stationary-side mold 100 and the movable-side mold 200 are separated from each other so that the stationary-side mold 100 and the movable- And is provided so as to be capable of changing a position in which a direction in which the contact surface is viewed when the contact surface is inserted into the fitting portion such that the plurality of contact surfaces and the engagement surfaces are engaged with each other.

The connection passage c is formed to connect the central portion of the sprue bushing 310 to one of the contact surfaces.

The connecting flow path c is changed every time the installation position of the sprue bushing 310 is changed, that is, every time the direction in which each contact surface of the sprue bushing 310 is changed is changed .

That is, the connection passage c is connected to at least one of the plurality of cavities. When the installation position of the sprue bush 310 is changed, the connection with at least one of the cavities connected is released and connected The connection direction may be changed so that connection with at least one of them is performed.

As a result, it is possible to select a cavity to be a resin supply target among a plurality of cavities only by changing the installation position of the sprue bushing 310.

The resin supply rod 350 passes through the stationary-side mold 100 and is engaged with the sprue bush 310. In the resin supply rod 350, a supply passage s is formed which is connected to the connection passage c and supplies the resin to the connection passage c.

According to the present embodiment, the resin supply rod 350 includes the insertion portion 360 and the nozzle coupling portion 370.

The insertion portion 360 is inserted into the mounting portion through the stationary-side mold 100, and one side of the insertion portion 360 is engaged with the sprue bush 310. A supply passage s is formed in the insertion portion 360 and a connection hole 361 for connecting the supply passage s to the connection passage c is formed at one side of the insertion portion 360 inserted into the mounting portion. .

The insertion portion 360 may be formed in a shape corresponding to the shape of the sprue bush 310 and may have a polygonal column shape longer than the sprue bush 310 and having a narrow width.

The supply passage s is formed to penetrate the center of the insertion part 360 along the longitudinal direction of the insertion part 360 and the connection hole 361 is formed to penetrate through one end of the insertion part 360 So as to expose the supply passage s in the lateral direction.

On the other hand, a through-hole 140 may be formed in the stationary-side mold 100. The penetrating part 140 is formed to penetrate the fixed side mold plate 110 in the up and down direction and connects the other side of the fixed side mold plate 110 and the mounting part so that the inserting part 360 of the resin supply rod 350, Side mold plate 110 from the other side to the mounting portion.

In addition, a fitting hole 323 for fitting the insertion portion 360 of the resin supply rod 350 into the center portion of the first bush portion 320 is formed to penetrate in the vertical direction.

The insertion portion 360 of the resin supply rod 350 is inserted into the sprue bushing 310 through the insertion hole 323 and inserted into the insertion hole 323 into which the insertion portion 360 is fitted, The connection between the supply passage s and the connection passage c in which the flow path s and the connection passage c are connected through the connection hole 361 is established.

The nozzle coupling portion 370 is formed on the other side of the insertion portion 360 exposed to the other side of the fixed side mold plate 110 and is formed on the other side of the fixed side mold plate 110 so as to protrude in a flange shape.

The supply passage s is upwardly exposed in the nozzle coupling portion 370 and a seating portion 371 for receiving a nozzle for supplying resin to the supply passage s is disposed on the upper surface of the nozzle coupling portion 370, Can be concavely formed.

In addition, a position indicator 373 for indicating the position of the connection hole 361 and the connection passage c may be formed in the nozzle coupling portion 370.

In this embodiment, the side surface of the nozzle coupling portion 370 is formed to have a curved surface, and the position indicating portion 373 is formed to have a flat or concave surface on the side surface of the curved nozzle coupling portion 370 do.

The position indicator 373 may be formed at a position corresponding to the position of the connection hole 361 along the direction in which the plurality of cavities are arranged, And the position of the connection channel c can be confirmed from the outside of the molds 100 and 200.

5 and 6 are views showing a change in the position of a resin supply device for injection molding test according to an embodiment of the present invention.

Hereinafter, the operation and effect of the resin supply apparatus for injection molding test and the injection molding apparatus having the same according to the present embodiment will be described with reference to FIGS. 1 to 6. FIG.

1 to 4, in order to check the state of the cavity of the injection molding machine before the full-scale production of the resin molded product using the injection molding apparatus 400, first, injection molding A resin supply apparatus for testing 300 is provided.

The injection molding test resin supply device 300 is mounted on the first mounting portion 130 formed on one side of the fixed side mold 100 in a state in which the fixed side mold 100 and the movable side mold 200 are separated from each other The sprue bush 310 is installed in the mounting portion in such a manner that the first bushing 320 is installed and the second bushing 330 is installed on the second mounting portion 230 formed on one side of the movable mold 200 The insertion portion 360 is inserted into the mounting portion through the penetration portion 140 from the other side of the stationary side mold plate 110 to be fitted into the first bush portion 320 and the nozzle is connected to the nozzle coupling portion 370 .

At this time, the sprue bush 310 is installed in the mounting portion with the mounting position adjusted such that the contact surface exposed to the connection flow path c faces the cavity to be tested. The resin supply rod 350 can also be installed on the stationary side mold 100 with the mounting position adjusted so that the connecting hole 361 faces the connecting flow path c. Can be confirmed by checking the position of the position display unit 373.

When the installation of the injection molding test resin supply device 300 is completed, the fixed side mold 100 and the movable side mold 200 are engaged and the molten resin is supplied through the nozzles. Is supplied from the supply flow path s through the connection hole 361 to the connection flow path c and then supplied to the test target cavity connected to the connection flow path c.

In this way, the resin supplied to the cavities to be tested is filled with the corresponding cavities and molded into a predetermined shape. After the molten resin thus formed is cooled and solidified, the fixed side mold 100 and the movable side mold are separated from each other, It is possible to take out the molded article from the cavity.

By confirming the state of the molded article thus taken out, the state of the cavity can be checked and checked.

In this embodiment, one connection passage (c) is formed in the sprue bush (310) to supply resin to one cavity. However, two or more connection passages (c) are formed in the sprue bush , So that multiple cavities can be checked and inspected at a time in a manner that simultaneously supplies the resin to two or more cavities.

When testing a cavity other than the tested cavity in this state, as shown in FIG. 3 and FIG. 5, the contact surface where the connection channel c is exposed faces the other cavity to be tested, Thereby changing the mounting position of the mounting portion 310.

According to the present embodiment, since the first bushing 320 and the second bushing 330 constituting the sprue bushing 310 are detachably installed in the fixed side mold 100 and the movable side mold 200, respectively, And the installation position of the sprue bush 310 can be easily changed.

Although not shown in FIG. 5, the resin supply rod 350 is also installed on the stationary-side mold 100 in a state where the mounting position is adjusted so that the connection hole 361 faces the connection channel c.

When the installation of the injection molding test resin supply device 300 is completed, the resin is supplied to the cavity connected to the connection channel (c), that is, another cavity to be tested, so that the state of the cavity can be checked and checked have.

3 and 6, when the contact surface on which the connection channel c is exposed is directed to another cavity to be tested, as shown in FIGS. 3 and 6, in order to test another cavity in addition to the cavity tested in the above- The installation position of the sprue bush 310 and the resin supply rod 350 may be changed.

According to the resin feeding device 300 for injection molding test and the injection molding apparatus 400 having the same as described above, it is possible to check and check the injection molding condition only by selecting a cavity to be tested as required , It is possible to effectively test the injection molding state by the injection molding machine and to reduce the waste of unnecessary resin in the test process.

The resin supply device 300 for injection molding test according to the present embodiment is configured such that the respective components such as the sprue bush 310 and the resin supply rod 350 constituting the resin supply device 300 for injection molding test are separated from each other So that it is easy to change the mounting position according to the test cavity change, and it is easy to disassemble, assemble, and replace, which is advantageous in that the maintenance is easy and the maintenance cost is low .

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 following claims.

100: Fixed side mold
110: Fixed-side mold plate
120: Fixed side cavity
130: first mounting portion
140:
200: movable side mold
210: movable mold plate
220: movable side cavity
230: second mounting portion
300: Resin feeding device for injection molding test
310: Spruce Bush
320: first bush section
321: First Euro Home
323: Insertion ball
330: second bush section
331: Second Euro Home
350: resin supply rod
360:
361: connecting ball
370:
371:
373: Position indicator
400: injection molding device

Claims (9)

At least one of a fixed side mold which is detachably coupled to the movable side mold and a plurality of cavities which are provided inside the movable side mold and in which a fixed side cavity formed in the fixed side mold and a movable side cavity formed in the movable side mold are connected, A sprue bush in which a connection channel selectively connected to the sprue bush is formed; And
And a resin supply rod connected to the sprue bushing through the fixed side mold and connected to the connection flow path to form a supply flow path for supplying the resin to the connection flow path,
The sprue bush is formed with a fitting hole into which the resin supply rod is fitted,
Wherein the resin supply rod has the supply passage formed therein, one side of the resin supply rod being inserted into the mounting portion through the stationary-side mold and being coupled to the sprue bushing, An inserting portion inserted into the inside of the sprue bushing and having a connection hole for connecting the supply passage to the connection passage at one side inserted into the mounting portion and the sprue bush; And
A nozzle coupling portion formed on the other side of the fixed mold and protruding from the other side of the insertion portion exposed to the other side of the stationary mold and having a recess for recessing a nozzle for supplying resin to the supply passage; Lt; / RTI >
Wherein the sprue bush comprises a first bushing which forms the upper half of the sprue bush and is detachably attached to the stationary mold, and a second bushing which is a lower half of the sprue bush and is detachably mounted on the movable mold, And a second bushing detachably coupled to the first bushing along a moving direction of the first mold, the second bushing being detachably attached to the stationary mold and the movable mold,
The fixed side mold and the movable side mold are provided with a first mounting portion provided on one side of the stationary side metal facing the movable side mold in a concave shape corresponding to the shape of the first bush portion, A mounting portion formed on one side of the movable mold and connected with a second mounting portion provided in a concave shape corresponding to the shape of the second bush portion is formed in a concave shape corresponding to the shape of the sprue bush,
Wherein the plurality of cavities are radially arranged around the sprue bush inserted into the mounting portion and the mounting portion,
Wherein the sprue bush is installed in the stationary-side mold and the movable-side mold with the outer peripheral surface thereof being inserted into the mounting portion so as to engage with the inner peripheral surface of the mounting portion,
A plurality of contact surfaces are arranged along the direction in which the cavities are arranged and engage with the inner circumferential surface of the mounting portion on the outer circumferential surface of the sprue bush formed in a polygonal columnar shape,
Wherein an engaging surface for engaging with the contact surface is provided on the inner circumferential surface of the mounting portion formed in a polygonal column shape corresponding to the shape of the sprue bush with a shape and number corresponding to the contact surface,
Wherein the sprue bush is detachably inserted into the mounting portion in a state in which the fixed side mold and the movable side mold are separated from each other and is detachably coupled to the fixed side mold and the movable side mold, Wherein the contact surface is inserted into the mounting portion so that the contact surface is inserted into the mounting portion,
The connection passage may be formed in the form of a through-hole having one side connected to the supply passage at the center of the sprue bushing and the other side connected to at least one of the plurality of contact surfaces. When the position of the sprue bush is changed, At least one of the cavities is disconnected and connected to at least one of the cavities,
The sprue bush inserted into the mounting portion is restricted in positional change due to interference generated between the contact surface and the engagement surface which are engaged with each other,
Wherein the nozzle coupling portion is formed with a position indicator for indicating a position of the connection hole and the connection passage.
delete The method according to claim 1,
A first flow path groove forming a part of the connection path is formed in the first bush portion,
Wherein the second bush portion is formed with a second flow path groove connected to the first flow path groove and forming the connection flow path together with the first flow path groove.
delete delete delete A stationary-side mold including a stationary-side mold plate and a plurality of stationary-side cavities formed on one side of the stationary-side mold plate;
And a plurality of movable side cavities formed on one side of the movable side mold plate facing the fixed side mold plate, wherein a plurality of the fixed side cavities and the movable side cavities are connected to each other, A movable mold which forms a plurality of cavities for molding and which is detachably coupled to the stationary mold; And
And a resin supply device for injection molding test, which is provided so as to be capable of changing its position with respect to the stationary mold and the movable mold, by supplying resin to the cavity connected to at least one of the plurality of cavities, ,
Wherein the resin supply device for injection-
And a plurality of cavities formed in the fixed side mold and the movable side mold and connected to the fixed side cavity formed in the fixed side mold and the movable side cavity formed in the movable side mold, A sprue bush formed in the inside thereof; And
And a resin supply rod connected to the sprue bushing through the fixed side mold and connected to the connection flow path to form a supply flow path for supplying the resin to the connection flow path,
The sprue bush is formed with a fitting hole into which the resin supply rod is fitted,
Wherein the resin supply rod has the supply passage formed therein, one side of the resin supply rod being inserted into the mounting portion through the stationary-side mold and being coupled to the sprue bushing, An inserting portion inserted into the inside of the sprue bushing and having a connection hole for connecting the supply passage to the connection passage at one side inserted into the mounting portion and the sprue bush; And
A nozzle coupling portion formed on the other side of the fixed mold and protruding from the other side of the insertion portion exposed to the other side of the stationary mold and having a recess for recessing a nozzle for supplying resin to the supply passage; Lt; / RTI >
Wherein the sprue bush comprises a first bushing which forms the upper half of the sprue bush and is detachably attached to the stationary mold, and a second bushing which is a lower half of the sprue bush and is detachably mounted on the movable mold, And a second bushing detachably coupled to the first bushing along a moving direction of the first mold, the second bushing being detachably attached to the stationary mold and the movable mold,
The fixed side mold and the movable side mold are provided with a first mounting portion provided on one side of the stationary side metal facing the movable side mold in a concave shape corresponding to the shape of the first bush portion, A mounting portion formed on one side of the movable mold and connected with a second mounting portion provided in a concave shape corresponding to the shape of the second bush portion is formed in a concave shape corresponding to the shape of the sprue bush,
Wherein the plurality of cavities are radially arranged around the sprue bush inserted into the mounting portion and the mounting portion,
Wherein the sprue bush is installed in the stationary-side mold and the movable-side mold with the outer peripheral surface thereof being inserted into the mounting portion so as to engage with the inner peripheral surface of the mounting portion,
A plurality of contact surfaces are arranged along the direction in which the cavities are arranged and engage with the inner circumferential surface of the mounting portion on the outer circumferential surface of the sprue bush formed in a polygonal columnar shape,
Wherein an engaging surface for engaging with the contact surface is provided on the inner circumferential surface of the mounting portion formed in a polygonal column shape corresponding to the shape of the sprue bush with a shape and number corresponding to the contact surface,
Wherein the sprue bush is detachably inserted into the mounting portion in a state in which the fixed side mold and the movable side mold are separated from each other and is detachably coupled to the fixed side mold and the movable side mold, Wherein the contact surface is inserted into the mounting portion so that the contact surface is inserted into the mounting portion,
The connection passage may be formed in the form of a through-hole having one side connected to the supply passage at the center of the sprue bushing and the other side connected to at least one of the plurality of contact surfaces. When the position of the sprue bush is changed, At least one of the cavities is disconnected and connected to at least one of the cavities,
The sprue bush inserted into the mounting portion is restricted in positional change due to interference generated between the contact surface and the engagement surface which are engaged with each other,
Wherein the nozzle coupling portion is formed with a position indicator for indicating a position of the connection hole and the connection passage.
8. The method of claim 7,
Wherein the fixing-side mold is formed so that a through-hole forming a passage through which the resin-supplying rod is inserted from the other side of the stationary-side mold into the mounting portion is formed to pass through.
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