KR101821529B1 - Vacuum injection molding machine for rubber product - Google Patents

Abstract

The purpose of the present invention is to provide a vacuum injection molding apparatus for rubber products, the vacuum injection molding apparatus which improves moldability and prevents extension of working hours due to discontinuous supply of the raw material by preventing air inflow due to discontinuous supply of the raw material when injecting a raw material (rubber) into the vacuum injection molding apparatus. The vacuum injection molding apparatus according to an embodiment of the present invention comprises: a lower frame which is held by supports that are erected on a main frame seated on the bottom surface, which is ascended or descended by pistons, and on which a lower mold is mounted; an upper frame which is installed on the top of the supports and includes an upper mold, an extruder for supplying the raw material, and a nozzle and a pusher for injecting the raw material into the upper and lower molds; and a vacuum chamber for maintaining the upper and lower molds in a vacuum state. The extruder includes: a raw material injection unit into which the raw material is injected; and an external force applying unit which is located in an upper side of the raw material injection unit to apply an external force such that the raw material injected through the raw material injection unit is moved into a mold space between the upper mold and the lower mold. The raw material injection unit includes: a connection unit of which one side is connected to the external force applying unit, and of which the other side is communicated with a compression space of the pusher; and an injection port which is formed in the bottom portion of the connection unit, and into which the raw material is injected. The external force applying unit allows a screw cylinder to pressurize the raw material injected into the injection port such that the raw material is moved to the compression space through the connection unit. The vacuum injection molding apparatus further comprises a support unit which guides the raw material along a moving path from the outside to the injection port in a state that the support unit is connected to the connection unit, and which prevents discontinuity of the raw material due to its own weight by supporting at least a portion of the raw material while the raw material is being moved to the injection port from the outside.

Description

Technical Field [0001] The present invention relates to a vacuum injection molding machine for rubber products,

The present invention relates to a rubber product vacuum injection molding apparatus, and more particularly, to a rubber product vacuum injection molding apparatus which comprises a lower frame which is held by a guide which is mounted on a main frame and which is mounted on a bottom surface and which is raised and lowered by a piston, , An extruder for supplying a raw material, a rubber product vacuum furnace including an upper frame installed with a nozzle and a pusher for injecting the raw material into the upper and lower molds and a vacuum chamber for maintaining the upper and lower molds in a vacuum state To an injection molding apparatus.

Generally, injection molding refers to molding a molding material such as a resin or rubber in a cylinder by heating and then gelling the molding material into an upper mold and a lower mold having heat and molding them into a desired shape through heat .

When the injection molding is performed in the air as described above, air remaining in the mold and gas due to thermal hardening of the material are generated and bubbles are generated in the molding process. Therefore, defects due to bubbles are generated inside and outside the molded product Lt; / RTI >

In order to solve such problems, a vacuum chamber is used which removes the air at the upper and lower mold positions, holds it in a vacuum state, and injects the raw material to improve moldability.

Korean Patent No. 10-1083530

Disclosure of the Invention An object of the present invention is to provide a rubber product which prevents the inflow of air in accordance with discontinuity of raw material supply during injection of a raw material (rubber) into a molding apparatus to improve moldability, And to provide a vacuum injection molding apparatus.

A rubber product vacuum injection molding apparatus according to an embodiment of the present invention includes a lower frame which is held by a support stand erected on a main frame that is seated on a floor and is raised and lowered by a piston and a lower mold is placed, , An extruder for supplying a raw material, a rubber product vacuum furnace including an upper frame installed with a nozzle and a pusher for injecting the raw material into the upper and lower molds and a vacuum chamber for maintaining the upper and lower molds in a vacuum state In the injection molding apparatus, the extruder may further include a raw material injecting portion into which the raw material is injected, and a raw material injected through the raw material injecting portion located above the raw material injecting portion, into a mold space between the upper mold and the lower mold. And an external force applying unit for applying an external force to move the material applying unit, , And the other side is provided with a connection part communicating with the compression space of the pusher and an injection port formed at the lower side of the connection part and through which the raw material is injected. The external force application part presses the raw material injected into the injection port by a screw cylinder The raw material is moved to the compression space through the connection portion and guided along a path from the outside of the raw material to the injection port while being connected to the connection portion, and during the movement from the outside of the raw material to the injection port, And a support for supporting at least a part of the raw material to prevent the raw material from being broken by its own weight.

The supporting portion of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention may include a protrusion forming portion protruding from one side of the connecting portion and located on the lower side of the external force applying portion, A roller portion disposed on the same line, a position movement restricting portion extending from the protrusion forming portion and disposed on an upper side of the injection port, and a connection portion connected to the connection portion, extending from the injection port toward the roller portion, Wherein the roller portion is rotated in one direction with being in contact with at least a portion of the raw material injected through the injection port to form a first portion from the outside of the raw material toward the injection port, And the position movement restricting portion restricts the movement of the roller portion And the position of the raw material in the first direction can be shifted while the raw material is being moved in the first direction without pressurizing the raw material, The movement of the raw material in the second direction can be restricted by pressing the raw material during the movement in the second direction opposite to the first direction.

The position movement restricting portion of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention includes a rotation shaft fixed to the protrusion forming portion and a rotation portion connected to the rotation shaft and rotated about the rotation shaft, The pivot portion is formed to have a second length that is longer than the first length, which is a distance between the rotation axis and the roller portion, and the first distance from the roller portion is maintained at the first position during movement of the raw material in the first direction And the roller is rotated from the first position to the second position with respect to the rotation axis in accordance with the contact with the raw material located between the roller and the roller during the movement of the raw material in the second direction, And when the roller portion and the roller portion are at the second spacing distance, the raw material is pressed by the roller portion and the roller portion, Can be moved is limited.

The pivoting portion of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention may be configured such that one end of the pivot portion facing the roller portion is formed in a concavo-convex shape, and when the second distance is away from the roller portion, The pressing force against the raw material is concentrated so that the movement of the raw material in the second direction can be restricted.

The position movement restricting portion of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention includes a fixing portion fixed to the protrusion forming portion, a protrusion portion extending from the fixing portion toward the roller portion, Wherein the rotating portion is spaced apart from the roller portion by a third separation distance and is rotated in the first rotating direction during the movement of the raw material in the first direction to rotate the first direction While the position of the raw material in the second direction is limited, the rotation in the second rotational direction, which is the opposite direction to the first rotational direction, is restricted, and the position of the raw material in the second direction You can limit your movement.

In the rubber product vacuum injection molding apparatus according to an embodiment of the present invention, when the raw material is moved in the first direction, the rotation direction of the rotation unit and the rotation direction of the roller unit may be different.

The supporting portion of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention is connected to the protrusion forming portion while being disposed in parallel with the roller portion and forms a hollow so that the raw material, And the hollow portion is disposed between the hollow portion and the injection port, and the hollow portion includes an intermediate portion connected to the protrusion forming portion, And the hollow forming part may be rotated about the intermediate part to change the guide path of the raw material to the roller part.

The inner surface of the connecting portion of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention is formed with a threaded portion in the same direction as the screw forming direction of the screw cylinder and the threaded portion is moved through the inner space of the connecting portion The raw material is guided to be moved in the rotational direction and the linear direction so that the raw material can be prevented from flowing back to the external force directed from the mold space toward the injection port.

The protrusion forming portion of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention includes a mounting portion mounted on the connecting portion, a position forming portion rotatably connected to the mounting portion, And a lock setting unit that determines whether or not the position forming unit is rotated with respect to the mounting unit, and the forming angle of the position forming unit with the external force applying unit can be determined according to the degree of rotation of the position generating unit with respect to the mounting unit.

According to the present invention, when the raw material (rubber) is injected into the molding apparatus, the inflow of air according to the discontinuity of the raw material supply can be prevented, and the moldability can be improved.

Further, it is possible to prevent the extension of the working time due to the discontinuity of the raw material supply to the molding apparatus, thereby increasing the yield of molded articles and reducing labor costs.

1 is a schematic perspective view showing a rubber product vacuum injection molding apparatus according to an embodiment of the present invention;
2 is a cross-sectional view taken along line AA in Fig.
Figures 3 and 4 are cross-sectional views along BB of Figure 1;
5 is a schematic perspective view showing an extruder of a rubber product vacuum injection molding apparatus according to an embodiment of the present invention.
FIG. 6 is a schematic side view for explaining a support part of a rubber product vacuum injection molding apparatus according to an embodiment of the present invention; FIG.
7 to 9 are schematic views showing a support part of a rubber product vacuum injection molding apparatus according to an embodiment of the present invention.
10 to 12 are schematic views showing a support part of a rubber product vacuum injection molding apparatus according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept. Other embodiments falling within the scope of the inventive concept may readily be suggested, but are also considered to be within the scope of the present invention.

The same reference numerals are used to designate the same components in the same reference numerals in the drawings of the embodiments.

1 is a schematic perspective view showing a rubber product vacuum injection molding apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line AA of FIG. 1, and FIGS. 3 and 4 are sectional views along line BB of FIG. 1 .

Here, FIGS. 3 and 4 are views showing a route of the raw material through the extruder of the rubber product vacuum injection molding apparatus according to an embodiment of the present invention.

1 to 4, a rubber product vacuum injection molding apparatus 1 (hereinafter, referred to as a molding apparatus) according to an embodiment of the present invention is held by a support stand 21 mounted on a main frame mounted on a floor surface, An upper mold 41 is provided on the upper end of the support 21 and an extrud 50 for supplying the raw material R and a lower mold 30 are mounted on the lower mold 30, An upper frame 40 provided with a nozzle 42 and a pusher 43 for injecting the upper and lower molds 31 and 31 into the upper and lower molds 31 and a vacuum for maintaining the upper and lower molds 31 in a vacuum state And may include a chamber 60.

First, the raw material R supplied through the extruder 50 is temporarily stored in the upper portion of the nozzle 42, and the lower mold 31 is temporarily stored in the piston 42. In the vacuum injection process by the molding apparatus 1, The upper mold 41 and the lower mold 31 are maintained in a vacuum state by the lifting mechanism 22 and the upper mold 41. At the same time, the vacuum chamber 60 is lowered to maintain the vacuum around the upper mold 41 and the lower mold 31. [

Next, the raw material R is injected and injected between the upper mold 41 and the lower mold 31 through the nozzle 42 by the pusher 43, and the vacuum chamber 60 rises again when the molding is completed, The mold 31 is lowered to be in the standby state for the next operation, and the product injection molding is realized by repeating this operation.

The extruder 50 is disposed above the raw material injecting section 51 and the raw material injecting section 51 through which the raw material R is injected and the raw material R injected through the raw material injecting section 51 is supplied to the upper And an external force applying unit 52 for applying an external force to the mold space between the mold 41 and the lower mold 31.

The other side of the raw material injecting portion 51 is connected to the external force applying portion 52 and the other side is formed on the lower side of the connecting portion 511 and the connecting portion 511 communicating with the compression space S of the pusher 43, And an injection port 512 through which the gas R is injected.

The external force applying unit 52 presses the raw material R injected into the injection port 512 by the screw cylinder so that the raw material R is moved to the compression space S through the connecting portion 511. [

The molding apparatus 1 according to the present invention guides the movement path from the outside of the raw material R to the injection port 512 while being connected to the connection portion 511 and moves from the outside of the raw material R to the injection port 512 (10) for supporting at least a part of the raw material (R) to prevent the raw material (R) from being broken by its own weight.

The supporting portion 10 will be described in detail with reference to Figs. 6 to 12 below.

FIG. 5 is a schematic perspective view showing an extruder of a rubber product vacuum injection molding apparatus according to an embodiment of the present invention, and FIG. 6 is a view for explaining a support of a rubber product vacuum injection molding apparatus according to an embodiment of the present invention Fig.

5 and 6, the supporting portion 10 of the molding apparatus 1 according to the embodiment of the present invention is disposed at a lower side of the external force applying portion 52, protruding from one side of the connecting portion 511 A roller section 13 extending from the protrusion forming section 11 and arranged in line with the injection port 512 and a roller section 13 extending from the protrusion forming section 11 and extending from the protrusion forming section 11 to the upper side of the injection port 512 And is extended from the injection port 512 toward the roller portion 13 to move from the roller portion 13 of the raw material R to the injection port 512 And a guide part 19 for guiding the guide part 19.

Here, the roller portion 13 is rotated in one direction in contact with at least a portion of the raw material R injected through the injection port 512 so as to be moved in the first direction D1 from the outside of the raw material R toward the injection port 512 As shown in FIG.

The position movement restricting portion 15a is disposed so that the raw material R is located between the roller portion 13 and the raw material R is not pressed during the movement of the raw material R in the first direction D1 Thereby enabling the movement of the raw material R in the first direction D1.

The position movement restricting section 15a restricts the movement of the raw material R in the second direction D2 by pressing the raw material R during the movement of the raw material R in the second direction D2 can do.

The position movement restricting portion 15a may be in contact with a part of the raw material R being moved on the roller portion 13 and may be in contact with the raw material R in a first direction D1 can be freely moved and the positional movement in the second direction D2 can be restricted.

Specifically, the position movement restricting portion 15a is in contact with a part of the raw material R, but moves in a first direction D1 of the raw material R in conjunction with the raw material R to move the raw material R The movement of the raw material R in the second direction D2 is not limited and the movement of the raw material R can be restricted so that the movement of the raw material R is not free.

The supporting portion 10 is connected to the protrusion forming portion 11 while being disposed in parallel with the roller portion 13 and forms a hollow H1 so that the raw material R having passed through the hollow H1 passes through the roller portion 13, (17) to be moved to the injection port (512), while being in contact with the injection port (13).

The roller portion 13 is disposed between the hollow portion 17 and the injection port 512 to facilitate the movement of the raw material R from the outside to the injection port 512. [

The hollow portion 17 has an intermediate portion 171 connected to the protrusion forming portion 11 and a hollow forming portion 173 connected to the intermediate portion 171 to form the hollow H1.

The hollow forming portion 173 can be rotated about the intermediate portion 171 to change the guide path to the roller portion 13 of the raw material R. [

The protrusion forming portion 11 includes a mounting portion 111 mounted on the connection portion 511, a position forming portion 113 connected to the mounting portion 111 so as to be rotatable, a mounting portion 111 and a position forming portion 113 And a lock setting unit for determining whether the position forming unit 113 is pivoted to the mounting unit 111 at the same time.

Also, the angle formed with the external force applying portion 52 can be determined according to the degree of rotation of the position forming portion 113 with respect to the mounting portion 111. [

The molding apparatus 1 according to the present invention is capable of moving the molding apparatus 1 from the outside through the opening of the injection opening 111 through the rotation degree of the position forming section 113 with respect to the mounting section 111 and rotation based on the mediating section 171 of the hollow forming section 173. [ The injection path of the raw material R into the molding apparatus 512 can be variously changed so that various rubber raw materials R having different viscosities can be injected into the molding apparatus 1 seamlessly.

5, the inner surface of the connection portion 511 is formed with a threaded portion 511a in the same direction as the screw shape of the screw cylinder.

The threaded portion 511a guides the raw material R moved through the inner space of the connecting portion 511 to be moved in the rotational direction and the linear direction so that the raw material R adheres to the external force from the mold space toward the injection port 512 It is possible to prevent backflow.

More specifically, the raw material R injected into the inner space of the connecting portion 511 through the injection port 512 is moved to the compression space S by the screw cylinder. At this time, the raw material R flows in the screw- And moves in the inner space of the connection part 511. [

The raw material R which is rotated while being moved to the inner space of the connection part 511 is guided by the threaded part 511a formed in the wetting space of the connection part 511 and the outer side is guided to the threaded part 511a As shown in Fig.

The threaded portion 511a presses the raw material R being moved in the inner space of the connection portion 511 in the form of a wedge so as to move the raw material R to an external force that is pressed in a linear direction, Can be obtained. When the movement of the raw material R is directed in the second direction D2 in response to an unexpected pressure from the compression space S toward the injection port 512, the threaded portion 511a moves the position of the raw material R So that backflow of the raw material R can be prevented.

7 to 9 are schematic views showing a support part of a rubber product vacuum injection molding apparatus according to an embodiment of the present invention.

7 to 9, the position movement restricting portion 15a of the molding apparatus 1 according to an embodiment of the present invention includes a rotation axis 151a and a rotation axis 151a fixed to the protrusion forming portion 11, And a turning unit 153a which is rotated with reference to the rotating shaft 151a while being connected.

The rotation part 153a is formed to have a second length that is longer than the first length, which is a distance between the rotation shaft 151a and the roller part 13,

The rotating portion 153a maintains the first spacing distance from the roller portion 13 at the first position (see FIG. 8) during the movement of the raw material R in the first direction D1, 9) from the first position with respect to the rotational axis 151a in accordance with the contact with the raw material R positioned between the roller portion 13 and the roller portion 13 during the positional movement in the second direction D2 And maintains the second spacing distance from the roller portion 13. The first spacing distance means a numerical value equal to or greater than the thickness of the raw material R, and the second spacing distance means a numerical value smaller than the thickness of the raw material R.

When the distance between the pivotal part 153a and the roller part 13 is equal to or greater than the thickness of the material R, that is, when the distance between the pivotal part 153a and the roller part 13 is equal to or greater than the thickness of the material R, The raw material R between the rotation unit 153a and the roller unit 13 is free to move without being disturbed by the rotation unit 153a and the roller unit 13 and the rotation unit 153a and the roller unit 13 When the distance between the pivotal portion 153a and the roller portion 13 is smaller than the thickness of the raw material R, the raw material R is conveyed to the pivotal portion 153a and the roller portion 13 by the pivot portion 153a and the roller portion 13 to limit the positional movement.

In addition, one end of the pivotal portion 153a opposite to the roller portion 13 is formed in a concavo-convex shape.

Thus, when the pivotal part 153a is at the second separation distance from the roller part 13, the pressing force against the raw material R is concentrated in the concavoconvex shape so that the position of the raw material R in the second direction D2 Ensure movement is limited without slip.

10 to 12 are schematic views showing a support part of a rubber product vacuum injection molding apparatus according to another embodiment of the present invention.

10 to 12, a rubber product vacuum injection molding apparatus according to another exemplary embodiment of the present invention includes a rubber product vacuum injection molding apparatus 20A described with reference to FIGS. 1 to 9, And therefore, only the positional movement restricting unit 15b will be described below.

The movement restricting portion 15b according to another embodiment of the present invention includes a fixing portion 151b fixed to the protrusion forming portion 11, a protrusion 153b extending from the fixing portion 151b toward the roller portion 13, And a rotation part 155b connected to the protrusion 153b so as to be rotatable.

The rotation unit 155b is disposed at a third separation distance from the roller unit 13 and is rotated in the first rotation direction R1 during the movement of the raw material R in the first direction D1 to rotate the raw material R ) In the first direction (D1). The third spacing distance means a numerical value equal to or smaller than the thickness of the raw material R. When the distance between the rotation part 155b and the roller part 13 is equal to or smaller than the thickness of the raw material R or when the distance between the rotation part 155b and the roller part 13 is equal to or smaller than the thickness of the raw material R, Is brought into contact with the rotating portion 155b and the roller portion 13 between the rotating portion 155b and the roller portion 13 or moved in a compressed state.

12) that is the opposite direction of the first rotation direction R1 (see Fig. 11) during the movement of the raw material R in the second direction D2 The movement of the raw material R in the second direction D2 is restricted. The rotation part 155b may be a reverse rotation prevention roller. The anti-reverse rotation roller is a roller that allows the rotation of the roller in one direction, but restricts the rotation of the roller in the other direction.

When the raw material R is moved in the first direction D1, the rotating direction of the rotating portion 155b and the rotating direction of the roller portion 13 may be different.

Specifically, when the rotation part 155b is rotated in the first rotation direction R1, the roller part 13 is rotated in the second rotation direction R2, and the rotation part 155b is positioned between the rotation part 155b and the roller part 13 So that the position of the raw material R from the outside to the injection port 512 can be easily made.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be apparent to those skilled in the art that changes or modifications may fall within the scope of the appended claims.

R: Raw material
1: Rubber product vacuum injection molding device
20: Main frame
30: Lower frame
40: upper frame
50: Extour
60: vacuum chamber
10: Support
11:
13:
15b:
17:
H1: hollow
19: Guide section

Claims (9)

A lower frame which is held by a support stand erected on a main frame mounted on a bottom surface and which is raised and lowered by a piston and in which a lower mold is placed, an upper mold on an upper end of the support, an extruder for feeding a raw material, And a vacuum chamber for maintaining the upper and lower molds in a vacuum state, the vacuum injection molding apparatus comprising:
The above-
And an external force applying unit for applying an external force to move the raw material injected through the raw material injecting unit to the mold space between the upper mold and the lower mold, the raw material injecting unit being located above the raw material injecting unit, ,
Wherein the raw material injecting portion has a connecting portion communicating with a compression space of the pusher and an injection port formed at a lower side of the connecting portion to inject the raw material,
Wherein the external force applying unit presses the raw material injected into the injection port by a screw cylinder to move the raw material to the compression space through the connection unit,
And guiding a movement path from the outside of the raw material to the injection port while being connected to the connection portion and supporting at least a part of the raw material during movement from the outside to the injection port of the raw material to prevent the raw material from being broken by its own weight The vacuum injection molding apparatus further comprising:
The method according to claim 1,
The support portion
A protruding portion protruding from a side surface of the connection portion and positioned on a lower side of the external force applying portion, a roller portion extending from the protruding portion and disposed in the same line as the injection port, And a guide portion connected to the connection portion and extending from the injection port toward the roller portion to guide movement of the raw material from the roller portion to the injection port,
Wherein the roller portion is rotated in one direction while being in contact with at least a portion of the raw material injected through the injection port to guide the movement of the raw material in the first direction from the outside to the injection port,
Wherein the position movement restricting portion is disposed so as to position the raw material between the roller portion and the roller portion, wherein during the movement of the raw material in the first direction, the raw material is moved in the first direction Characterized in that the movement of the material in the second direction is restricted by pressing the material during the movement of the material in the second direction opposite to the first direction of the material Products Vacuum injection molding machine.
3. The method of claim 2,
Wherein the position movement restricting unit includes:
A rotation shaft fixed to the protrusion forming part and a rotation part connected to the rotation shaft and rotated about the rotation axis,
Wherein the rotating portion is formed to have a second length that is longer than a first length which is a distance between the rotation axis and the roller portion, and a first distance from the roller portion at the first position during the movement of the raw material in the first direction And the roller is rotated from the first position to the second position with respect to the rotation axis in accordance with the contact with the raw material located between the roller and the roller during the movement of the raw material in the second direction, And the second separation distance is maintained,
The first distance is equal to or larger than the thickness of the raw material,
The second spacing distance is smaller than the thickness of the raw material,
Wherein when the rotation part and the roller part are at the second separation distance, the raw material is pressed by the rotation part and the roller part to restrict the movement of the rubber product.
The method of claim 3,
The pivoting portion,
Wherein the roller unit is formed in a concavo-convex shape at one side, and when the roller unit is at a second distance from the roller unit, a pressing force is concentrated on the raw material in the concavo- Of the rubber product.
3. The method of claim 2,
Wherein the position movement restricting unit includes:
A fixing portion fixed to the protrusion forming portion, a protrusion portion extending from the fixing portion toward the roller portion, and a rotation portion rotatably connected to the protrusion portion,
The rotation unit includes:
The first roller being rotatable in a first rotation direction during the movement of the raw material in the first direction so as to enable the position of the raw material to move in the first direction, The rotation of the raw material in the second rotation direction, which is the opposite direction to the first rotation direction, is limited during the movement of the raw material in the second direction, thereby restricting the movement of the raw material in the second direction,
Wherein the third distance is equal to or smaller than the thickness of the raw material.
6. The method of claim 5,
Wherein when the raw material is moved in the first direction, the rotating direction of the rotating part and the rotating direction of the roller part are different from each other.
5. The method according to any one of claims 3 to 4,
The support portion
Further comprising a hollow portion connected to the projection forming portion while being disposed in parallel with the roller portion, the hollow portion forming a hollow and allowing the raw material passing through the hollow to move to the injection port while being in contact with the roller portion,
Wherein the roller portion is disposed between the hollow portion and the injection port,
The hollow portion
An intermediate portion connected to the protrusion forming portion and a hollow forming portion connected to the intermediate portion to form the hollow,
Wherein the hollow forming portion rotates about the intermediate portion to change the guide path of the raw material to the roller portion.
3. The method of claim 2,
The inner surface of the connecting portion
A threaded portion is formed in the same direction as the screw forming direction of the screw cylinder,
The threaded portion,
Wherein the raw material moving through the inner space of the connecting portion is guided so as to be moved in the rotational direction and the linear direction to prevent the raw material from flowing back to the external force directed from the mold space toward the injection port. Molding device.
3. The method of claim 2,
The protruding-
And a lock setting unit that is connected to the mounting unit and the position forming unit at the same time to determine whether the position generating unit is pivoted to the mounting unit,
Wherein an angle formed with the external force applying portion is determined according to a degree of rotation of the position forming portion with respect to the mounting portion.

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