KR102429140B1 - Injection Molding Apparatus - Google Patents

Abstract

The present invention relates to a barrel for storing a molding material, an injection screw installed to be positioned inside the barrel, an injection bracket to which the barrel is installed, and a first barrel installed in the injection bracket to support the barrel installed in the injection bracket. It relates to an injection apparatus including a bracket, wherein at least one of the injection bracket and the first barrel bracket supports the barrel to limit rotation of the barrel according to rotation of the injection screw.

Description

Injection Molding Apparatus

The present invention relates to an injection apparatus used for manufacturing a molded article by injecting a molding material in a molten state into a mold.

Injection molding is the most widely used manufacturing method for manufacturing plastic products. For example, in products such as televisions, mobile phones, PDAs, and the like, various parts including covers and cases may be manufactured through injection molding.

In general, the manufacture of products through injection molding is made through the following processes. First, a molding material with pigments, stabilizers, plasticizers, fillers, etc. added is put into a hopper to make it molten. Next, the molding material in the molten state is injected into the mold and then solidified through cooling. Next, after extracting the solidified molding material from the mold, unnecessary parts are removed. Through these processes, injection products having various types and sizes are manufactured.

As a facility for performing such injection molding, an injection molding machine is used.

1 is a schematic block diagram of an injection molding machine according to the prior art.

Referring to FIG. 1 , an injection molding machine 10 according to the prior art includes an injection device 11 and a clamping device 12 .

The injection device 11 is for supplying a molding material in a molten state to the clamping device 12 . The injection device 11 includes a barrel 111 , an injection screw 112 rotatably installed inside the barrel 111 , and an injection driver 113 for driving the injection screw 112 . When the molding material is supplied to the inside of the barrel 111 through the hopper, the injection device 11 melts and measures the molding material in the barrel 111, and then the injection driver 113 moves the injection screw 112 ) to supply the molding material in a molten state to the clamping device 12 .

The clamping device 12 is for manufacturing an injection product by solidifying the molding material in a molten state supplied from the injection device 11 through cooling. The clamping device 12 includes a mold 121 having a cavity having a shape corresponding to an injection product. When the injection device 11 supplies the cavity in the molten state to the cavity of the mold 121 , the clamping device 12 cools the mold 121 to solidify the molding material in the molten state located in the cavity. Accordingly, the molding material in the molten state is solidified and manufactured into an injection product.

In the injection molding machine 10 according to the prior art, the injection device 10 includes an injection bracket 114 for supporting the barrel 111 . The barrel 111 is supported by the injection bracket 114 by being inserted into the injection bracket 114 . In this case, as the injection screw 112 located inside the barrel 111 rotates, the barrel 111 may rotate together with the injection screw 112 .

Accordingly, the injection molding machine 10 according to the prior art melts and measures the molding material in the barrel 111 due to the rotation of the barrel 111, and the accuracy of the operation and the molding material in the molten state are transferred to the clamping device ( 12), there is a problem that the accuracy of the work supplied to it is lowered.

The present invention has been devised to solve the above-described problems, and an object of the present invention is to provide an injection apparatus capable of restricting rotation of a barrel as an injection screw rotates.

In order to achieve the above object, the present invention may include the following configuration.

An injection device according to the present invention comprises: a barrel for storing a molding material; an injection screw installed to be located inside the barrel; an injection bracket to which the barrel is installed; and a first barrel bracket installed on the injection bracket to support the barrel installed on the injection bracket. The first barrel bracket may include a first fixing member installed to be fixed to the injection bracket, and a first limiting member formed to protrude from the first fixing member. The first limiting member may support a portion of the barrel positioned inside the injection bracket to limit rotation of the barrel according to rotation of the injection screw.

A barrel for storing the injection molding material according to the present invention; an injection screw installed to be located inside the barrel; an injection bracket to which the barrel is installed; and a first barrel bracket installed on the injection bracket to support the barrel installed on the injection bracket. The injection bracket may include an insertion groove into which the barrel is inserted, and a restraining surface for restricting rotation of the barrel according to rotation of the injection screw by supporting a portion of the barrel inserted into the insertion groove.

According to the present invention, the following effects can be achieved.

The present invention is implemented to limit the rotation of the barrel due to the rotation of the injection screw, thereby improving the accuracy of the operation of melting and metering the molding material in the barrel and the operation of supplying the molding material in the molten state to the clamping device. In addition, it can contribute to improving the quality of injection products.

The present invention is implemented so that at least one of the barrel bracket and the injection bracket has a limiting function for limiting the rotation of the barrel, thereby reducing material cost, as well as installing the barrel to the injection bracket and separating the barrel from the injection bracket The easiness of the separation operation can be improved.

1 is a schematic block diagram of an injection molding machine according to the prior art;
2 is a schematic perspective view of an injection molding machine equipped with an injection device according to the present invention;
3 is a schematic cross-sectional view showing an injection apparatus according to the present invention taken along line II of FIG.
4 is a schematic perspective view of a first barrel bracket in the injection device according to the present invention;
5 is a schematic exploded cross-sectional view of the first barrel bracket and the barrel taken along the line II-II of FIG. 3 in the injection device according to the present invention;
6 is a schematic cross-sectional view of the first barrel bracket and the barrel taken along the line II-II of FIG. 3 in the injection device according to the present invention;
7 and 8 are schematic exploded cross-sectional views showing a modified embodiment of the first barrel bracket and the barrel on the basis of the line II-II of FIG. 3 in the injection device according to the present invention;
9 is a schematic partial cross-sectional view of an injection apparatus according to the present invention taken along line II of FIG.
10 is a schematic perspective view of the first barrel bracket and the second barrel bracket in the injection device according to the present invention;
11 is a schematic exploded cross-sectional view of the second barrel bracket and the barrel taken along line III-III of FIG. 9 in the injection device according to the present invention;
12 and 13 are schematic exploded cross-sectional views showing a modified embodiment of the second barrel bracket and the barrel on the basis of the line III-III of FIG. 9 in the injection device according to the present invention;
14 to 16 are schematic exploded cross-sectional views of the injection bracket and the barrel taken along line IV-IV of FIG. 9 in the injection device according to a modified embodiment of the present invention.

Hereinafter, an embodiment of an injection device according to the present invention will be described in detail with reference to the accompanying drawings.

2 and 3 , the injection device 1 according to the present invention is provided in the injection molding machine 100 (shown in FIG. 2 ) for manufacturing an injection product.

The injection device 1 according to the present invention serves to supply the molding material in a molten state to the clamping device 200 (shown in FIG. 2 ) provided in the injection molding machine 100 . The clamping device 200 serves to solidify the molding material in a molten state into an injection product through cooling. The clamping device 200 includes a mold having a cavity having a shape corresponding to the injection product. When the molding material is supplied through a hopper (not shown), the injection device 1 according to the present invention melts and measures the molding material, and then supplies the molding material in the molten state to the cavity of the mold.

The injection device 1 according to the present invention includes a barrel 2 , an injection screw 3 , an injection bracket 4 , and a first barrel bracket 5 .

2 and 3, the barrel 2 is to store the molding material. The molding material may be supplied through a hopper. The barrel 2 may heat the molding material and store it in a molten state. The barrel 2 may be formed in a cylindrical shape with an empty interior as a whole.

A nozzle 2a may be coupled to the barrel 2 . The nozzle 2a functions as a passage through which the molten molding material stored in the barrel 2 is supplied to the clamping device 200 (shown in FIG. 2 ). The barrel 2 may be positioned between the nozzle 2a and the injection bracket 3 .

2 and 3 , the injection screw 3 performs a metering process for the molten molding material and a moving process for the molten molding material. The injection screw 3 may be installed to be located inside the barrel 2 . The injection screw 3 rotates while positioned inside the barrel 2 so that the molten molding material is metered and stored inside the barrel 2 . Accordingly, the injection screw may perform the metering process. The injection screw 3 moves while positioned inside the barrel 2 , so that the molding material in a molten state is supplied to the clamping device 200 . Accordingly, the injection screw 3 can perform the moving process. The injection screw 3 may be formed in a cylindrical shape as a whole, but is not limited thereto, and may be formed in another shape as long as it can implement a metering function for the molding material in a molten state and a function to move the molding material in a molten state. may be A thread may be formed on an outer surface of the injection screw 3 positioned inside the barrel 2 .

2 and 3 , the injection bracket 4 supports the barrel 2 . The injection bracket 4 may be coupled to the injection body 1a (shown in FIG. 3 ). The injection bracket 4 may have a supporting force for supporting the barrel 2 by being defective in the injection body 1a. The injection bracket 4 may be formed in a rectangular parallelepiped shape as a whole, but is not limited thereto, and may be formed in another shape as long as it can have a supporting force for supporting the barrel 2 .

A receiving hole may be formed in the injection bracket 4 . The receiving hole may be formed through the injection bracket. The barrel 2 and the injection screw 3 may be arranged to cross the injection bracket 4 through the receiving hole. Accordingly, the barrel 2 and the injection screw 3 are installed on the injection bracket 4 so that one side protrudes from the injection bracket 4 in the first direction (FD arrow direction, shown in FIG. 3 ). can be The first direction (direction of the FD arrow) is when the injection device 1 and the clamping device 200 according to the present invention constitute the injection molding machine 100 (shown in FIG. 2 ), the clamping device 200, 2) in the direction toward the injection device 1 according to the present invention. The barrel 2 and the injection screw 3 may be installed on the injection bracket 4 so that the other side protrudes from the injection bracket 4 in the second direction (SD arrow direction, shown in FIG. 3 ). . The second direction (SD arrow direction) is opposite to the first direction (FD arrow direction).

3 to 6 , the first barrel bracket 5 supports the barrel 2 . The first barrel bracket 5 may be installed on the injection bracket 4 to support the barrel 2 installed on the injection bracket 4 . The first barrel bracket 5 may include a first fixing member 51 and a first limiting member 52 .

The first fixing member 51 is installed to be fixed to the injection bracket (4). The first fixing member 51 may be fixed to the injection bracket 4 , thereby having a supporting force for supporting the first limiting member 52 . The first fixing member 51 may be formed in a rectangular parallelepiped shape as a whole, but is not limited thereto, and is fixed to the injection bracket 4 to have a supporting force for supporting the first limiting member 52 . may be formed as

The first fixing member 51 may be installed to be fixed to the injection bracket 4 through a first fastening member (not shown) such as a bolt. In this case, a first fixing hole 511 (shown in FIG. 4 ) may be formed in the first fixing member 51 . The first fixing hole 511 may be formed through the first fixing member 51 . The first fastening member is inserted into the first fixing member 51 and the injection bracket 4 through the first fixing hole 511, so that the first fixing member 51 is connected to the injection bracket (4). can be fixed on

A plurality of first fixing holes 511 may be formed in the first fixing member 51 . In this case, the first fixing holes 511 may be formed to pass through the first fixing member 51 at positions spaced apart from each other. Accordingly, the first fixing member 51 is fixed to the injection bracket 4 through a plurality of first fastening members, so that it can be more firmly fixed to the injection bracket 4 . Accordingly, the support force of the first fixing member 51 to support the first limiting member 52 may be further increased.

The first limiting member 52 limits the rotation of the barrel 2 according to the rotation of the injection screw 3 . The first limiting member 52 may limit the rotation of the barrel 2 by supporting a portion of the barrel 2 located inside the injection bracket 4 . Accordingly, the injection device 1 according to the present invention can achieve the following effects.

First, the injection device 1 according to the present invention can limit the rotation of the barrel 2 due to the rotation of the injection screw 3 using the first barrel bracket 5 . Accordingly, the injection apparatus 1 according to the present invention improves the accuracy of the operation of melting and measuring the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping apparatus 200. can Therefore, the injection device 1 according to the present invention can contribute to improving the quality of the injection product.

Second, in the injection device 1 according to the present invention, the barrel 2 is fixed to the injection bracket 4 using the first barrel bracket 5 and the rotation of the barrel 2 is restricted at the same time. implemented to do so. That is, the first barrel bracket 5 may have a fixing function for fixing the barrel 2 to the injection bracket 4 and a limiting function for limiting the rotation of the barrel 2 . Therefore, the injection device 1 according to the present invention can reduce material cost as well as inject the barrel 2 when compared to the embodiment in which the fixing function and the limiting function are implemented through separate configurations, respectively. It is possible to improve the easiness of the installation operation of installing the bracket (4) and the separation operation of separating the barrel (2) from the injection bracket (4).

The first limiting member 52 may be formed to protrude from the first fixing member 51 . Accordingly, the first limiting member 52 is inserted deeper into the inside of the injection bracket 4 than the first fixing member 51 , and thus the inside of the injection bracket 4 in the barrel 2 . part can be supported. 5 , the first limiting member 52 may be formed to protrude downward from the first fixing member 51 . The first fixing member 51 may be formed to have a larger size than the limiting member 52 so as to protrude in both directions of the limiting member 52 . The first limiting member 52 and the first fixing member 51 may be integrally formed.

The first limiting member 52 may include a first limiting surface 521 .

The first limiting surface 521 is in contact with the barrel 2 to limit the rotation of the barrel 2 . The first limiting surface 521 may be formed to form a flat surface. In this case, the barrel 2 may include a first contact surface 21 (shown in FIG. 5 ) formed to be flat. The first barrel bracket 5 may be installed on the injection bracket 4 so that the first limiting surface 521 is in contact with the first contact surface 21 . Accordingly, the first limiting surface 521 is in contact with the first contact surface 21 to support the first contact surface 21 . Accordingly, the first limiting member 52 may restrict the rotation of the barrel 2 by supporting the barrel 2 through the first limiting surface 521 . The barrel 2 may be formed such that a portion other than the portion on which the first contact surface 21 is formed forms a curved surface.

The first limiting surface 521 may be implemented such that the entire surface is in contact with the entire surface of the first contact surface 21 . In this case, since there is no gap between the first limiting surface 521 and the first contacting surface 21 when the first limiting surface 521 is in contact with the first contacting surface 21 , the first limiting member Reference numeral 52 may block rotation of the barrel 2 due to the rotation of the injection screw 3 . Accordingly, the injection device 1 according to the present invention further improves the accuracy of the operation of melting and measuring the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping device 200 . can do it Therefore, the injection device 1 according to the present invention can contribute to further improving the quality of the injection product.

Referring to FIG. 5 , the first limiting surface 521 and the first contact surface 21 may be disposed parallel to the horizontal direction. Although not shown, the first limiting surface 521 and the first contact surface 21 may be inclined with respect to the horizontal direction. In this case, the first limiting surface 521 and the first contact surface 21 may be disposed to be inclined at the same angle with respect to the horizontal direction so that their entire surfaces may be in contact with each other.

3, 7 and 8 , the first limiting member 52 may include a plurality of the first limiting surfaces 521 .

The first limiting surfaces 521 may be connected to each other so that an included angle 521a forms an obtuse angle. Accordingly, in contrast to the case where the first limiting surfaces 521 are connected so that the angle 521a between them forms an acute angle or a right angle, the first limiting surfaces 521 have an angle between them. By connecting the 521a to form an obtuse angle, an entrance area for inserting the first contact surface 21 between the first limiting surfaces 521 may be widened. Accordingly, in the injection device 1 according to the present invention, the first limiting surfaces 521 are connected to each other so that an angle 521a between them forms an obtuse angle, so that the first limiting surface 521 is the first contact surface ( 21) has the advantage of improving the easiness of the operation of installing the first barrel bracket (5) to the injection bracket (4).

When the first limiting member 52 includes a plurality of the first limiting surfaces 521 , the barrel 2 may include a plurality of the first contact surfaces 21 . In this case, the barrel 2 may include the same number of first contact surfaces 21 as the number of first limiting surfaces 521 of the first limiting member 52 . Accordingly, in the injection apparatus 1 according to the present invention, the first limiting member 52 increases the support area for supporting the barrel 2 , thereby passing the barrel 2 through the first limiting member 52 . It is possible to increase the constraining force that restricts the rotation of Accordingly, the injection device 1 according to the present invention further improves the accuracy of the operation of melting and measuring the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping device 200 . Not only can it be done, but it can also contribute to further improving the quality of injection products.

For example, as shown in FIG. 7 , the first limiting member 52 may be implemented to include two first limiting surfaces 521 and 521 ′. In this case, the first limiting surfaces 521 and 521 ′ may be connected to each other so that the angle between them 521a forms an obtuse angle. The barrel 2 may be implemented to include two first contact surfaces 21 and 21'. The first contact surfaces 21 and 21' may be connected to each other to correspond to the first limiting surfaces 521 and 521'. The first barrel bracket 5 is the injection bracket 4 in FIG. 3 so that the first contact surfaces 21 and 21' are inserted into the space located between the first limiting surfaces 521 and 521'. shown) can be installed. In this case, the entire surface of each of the first limiting surfaces 521 and 521 ′ may be in contact with the entire surface of each of the first contact surfaces 21 and 21 ′. In FIG. 7, both of the two first limiting surfaces 521 and 521' are shown to be inclined with respect to the transverse direction, but the present invention is not limited thereto, and any one of the two first limiting surfaces 521 and 521' One first limiting surface 521 may be disposed parallel to the horizontal direction, and the other first limiting surface 521' may be disposed inclined with respect to the horizontal direction.

For example, as shown in Fig. 8, the first limiting member 52 may be implemented to include three first limiting surfaces 521, 521', and 521". In this case, the first limiting surface The angles 521, 521', and 521" may be connected to each other so that the angles 521a and 521a' form an obtuse angle, respectively. The barrel 2 may be embodied to include three first contact surfaces 21, 21', 21". The first contact surfaces 21, 21', 21" are the first limiting surfaces (521, 521', 521") may be formed connected to each other. The first barrel bracket 5 is located between the first limiting surfaces 521, 521', 521" in the space. It may be installed on the injection bracket 4 (shown in FIG. 3) so that the first contact surfaces 21, 21' and 21" are inserted. In this case, the first limiting surfaces 521, 521', The entire surface of each 521" may be in contact with the entire surface of each of the first contact surfaces 21, 21', 21". In FIG. 8, three first limiting surfaces 521, 521 ', 521"), one of the first limiting surfaces 521 is disposed parallel to the horizontal direction, and the other two first limiting surfaces 521', 521" are inclined with respect to the horizontal direction. Although it is shown to be arranged to be oblique, the present invention is not limited thereto, and all of the three first limiting surfaces 521 , 521 ′, 521 ″ may be arranged to be inclined with respect to the horizontal direction.

Although not shown, the first limiting member 52 may be implemented to include four or more first limiting surfaces 521 . In this case, the barrel 2 may be implemented to include four or more first contact surfaces 21 .

Here, the first limiting member 52 may be implemented to restrict the rotation of the barrel 2 by supporting the upper surface of the barrel 2 as shown in FIGS. 5 to 8 . In this case, the first contact surface 21 may be formed to form an upper surface of the barrel 2 . Although not shown, the first limiting member 52 may be implemented to restrict the rotation of the barrel 2 by supporting the side surface of the barrel 2 . In this case, the first contact surface 21 may be formed to form a side surface of the barrel 2 . The first limiting member 52 may be implemented to restrict the rotation of the barrel 2 by supporting the lower surface of the barrel 2 . In this case, the first contact surface 21 may be formed to form a lower surface of the barrel 2 .

3 and 4 , the first barrel bracket 5 may include a hopper hole 53 (shown in FIG. 4 ).

The hopper hole 53 may be formed through the first fixing member 51 and the first limiting member 52 . The first barrel bracket 5 may support a hopper (not shown) installed to be connected to the hopper hole 53 . The hopper is connected to communicate with the inside of the barrel 2 through the hopper hole 53 , so that the molding material can be supplied to the inside of the barrel 2 through the hopper hole 53 . Accordingly, the first barrel bracket 5 has a fixing function for fixing the barrel 2 to the injection bracket 4 , a limiting function for limiting the rotation of the barrel 2 , and a It may have a connection function that provides a passage for supplying the molding material therein. Therefore, the injection device 1 according to the present invention can reduce material cost as well as reduce the material cost when compared to the embodiment in which the fixing function, the limiting function, and the connecting function are implemented through separate configurations, respectively. It is possible to improve the easiness of the installation operation of installing 2) to the injection bracket (4) and the separation operation of separating the barrel (2) from the injection bracket (4). When the first barrel bracket 5 includes the hopper hole 53 , the first limiting member 52 may be implemented to restrict the rotation of the barrel 2 by supporting the upper surface of the barrel 2 . can

2 and 3 , the injection device 1 according to the present invention may include an injection drive unit 6 .

The injection drive unit 6 is for driving the injection screw 3 . The injection driver 5 rotates the injection screw 3 so that the molding material in a molten state is metered and stored in the barrel 2 . When the metering of the molding material in the molten state is completed, the injection driver 5 moves the injection screw 3 so that the molding material in the molten state is supplied to the clamping device 200 .

The injection driver 6 may be installed in the injection body 1a. The injection body 1a may be movably installed on a floor surface of a workshop where injection molding is performed. Accordingly, as the injection body 1a moves toward the clamping device 200 in a state spaced apart from the clamping device 200, the nozzle 2a is connected to the cavity of the mold of the clamping device 200. can In this case, a nozzle fastening device (not shown) may be installed in the injection body 1a. The nozzle fastening device may move the injection body 1a toward the clamping device 200 .

The injection drive unit 6 may include a first drive mechanism and a second drive mechanism.

The first driving mechanism is for rotating the injection screw 3 . As the first driving mechanism rotates the injection screw 3 , the molten molding material may be metered and stored in the barrel 2 . The first driving mechanism may include a motor that generates a rotational force for rotating the injection screw 3 .

The second driving mechanism is for moving the injection screw 3 . The second driving mechanism 6 may move the injection screw 3 in a forward direction toward the clamping device 200 and in a backward direction opposite to the forward direction. The second driving mechanism may move the injection screw 3 connected to the first driving mechanism in the forward direction and the backward direction by moving the first driving mechanism in the forward direction and the backward direction. In this case, the first driving mechanism may be movably installed in the injection body 1a. The second driving mechanism may be fixedly installed to the injection body 1a. The second driving mechanism may be fixedly coupled to the injection body 1a by being installed on the injection bracket 4 .

When the second drive mechanism moves the first drive mechanism in the retracting direction, the first drive mechanism can move the injection screw 3 in the retracting direction while moving away from the injection bracket 4 have. In this state, when the first driving mechanism rotates the injection screw 3 , the operation of measuring the molding material in a molten state and storing it in the barrel 2 may be performed. When the second drive mechanism moves the first drive mechanism in the forward direction, the first drive mechanism moves closer to the injection bracket 4 while moving the injection screw 3 in the forward direction. have. Accordingly, the injection screw 3 may supply the molding material in a molten state stored inside the barrel 2 to the clamping device 200 .

The second drive mechanism is a cylinder method using a hydraulic cylinder or a pneumatic cylinder, a ball screw method using a motor and a ball screw, a gear method using a motor, a rack gear, a pinion gear, etc., a belt method using a motor, a pulley, a belt, etc. , it is possible to move the injection screw 3 in the forward direction and the backward direction through a linear motor method using a coil and a permanent magnet, or the like.

2, 3, and 9 to 11 , the injection device 1 according to the present invention may include a second barrel bracket 7 .

The second barrel bracket 7 supports the barrel 2 . The second barrel bracket 7 may be installed on the injection bracket 4 to support the barrel 2 installed on the injection bracket 4 . The second barrel bracket 7 may be installed on the injection bracket 4 at a position spaced apart from the first barrel bracket 5 . Accordingly, the second barrel bracket 7 and the first barrel bracket 5 support the barrel 2 at different positions, thereby limiting the rotation of the barrel 2 . Accordingly, the injection device 1 according to the present invention increases the limiting force for limiting the rotation of the barrel 2 by using the second barrel bracket 7 and the first barrel bracket 5, so that the barrel In (2), it is possible to further improve the accuracy of the operation of melting and measuring the molding material and the operation of supplying the molding material in the molten state to the clamping device 200, as well as improving the quality of the injection product. can contribute The second barrel bracket 7 may be installed on the injection bracket 4 at a position spaced apart from the first barrel bracket 5 in the first direction (FD arrow direction).

The second barrel bracket 7 may include a second fixing member 71 and a second limiting member 72 .

The second fixing member 71 is installed to be fixed to the injection bracket 4 . The second fixing member 71 may be fixed to the injection bracket 4 , thereby having a supporting force for supporting the second limiting member 72 . The second fixing member 71 may be formed in a rectangular parallelepiped shape as a whole, but is not limited thereto, and is fixed to the injection bracket 4 to have a supporting force for supporting the second limiting member 72 . may be formed as

The second fixing member 71 may be installed to be fixed to the injection bracket 4 through a second fastening member (not shown) such as a bolt. In this case, a second fixing hole 711 (shown in FIG. 10 ) may be formed in the second fixing member 71 . The second fixing hole 711 may be formed through the second fixing member 71 . The second fastening member is inserted into the second fixing member 71 and the injection bracket 4 through the second fixing hole 711, so that the second fixing member 71 is connected to the injection bracket (4). can be fixed on

A plurality of second fixing holes 711 may be formed in the second fixing member 71 . In this case, the second fixing holes 711 may be formed to pass through the second fixing member 71 at positions spaced apart from each other. Accordingly, the second fixing member 71 is fixed to the injection bracket 4 through a plurality of second fastening members, so that it can be more firmly fixed to the injection bracket 4 . Accordingly, the support force of the second fixing member 71 supporting the second limiting member 72 may be further increased.

The second limiting member 72 limits the rotation of the barrel 2 according to the rotation of the injection screw 3 . The second limiting member 72 may restrict the rotation of the barrel 2 by supporting a portion located inside the injection bracket 4 of the barrel 2 . The second limiting member 72 supports a part of the barrel 2 that is spaced apart from the part supported by the first limiting member 52 so that the barrel 2 is rotated according to the rotation of the injection screw 3 . Rotation can be restricted. Accordingly, the injection device 1 according to the present invention can achieve the following effects.

First, the injection device 1 according to the present invention uses the second limiting member 72 and the first limiting member 52 to rotate the barrel 2 due to the rotation of the injection screw 3 . It can increase the constraint that limits what can be done. Accordingly, the injection apparatus 1 according to the present invention improves the accuracy of the operation of melting and measuring the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping apparatus 200 . can do it Therefore, the injection device 1 according to the present invention can contribute to further improving the quality of the injection product.

Second, in the injection device 1 according to the present invention, the barrel 2 is fixed to the injection bracket 4 using the second barrel bracket 7 and the first barrel bracket 5, and the It is implemented so as to limit the rotation of the barrel 2 . That is, the second barrel bracket 7 and the first barrel bracket 5 each have a fixing function of fixing the barrel 2 to the injection bracket 4, and limiting the rotation of the barrel 2, respectively. It may have limited functions. Therefore, the injection device 1 according to the present invention can reduce material cost as well as provide the fixing function and the limiting function when compared with the embodiment in which the fixing function and the limiting function are implemented through separate configurations. It has the advantage of being further strengthened.

The second limiting member 72 may be formed to protrude from the second fixing member 71 . Accordingly, the second limiting member 72 is inserted deeper into the inside of the injection bracket 4 than the second fixing member 71 , and thus the inside of the injection bracket 4 in the barrel 2 . part can be supported. 11 , the second limiting member 72 may be formed to protrude downward from the second fixing member 71 . The second fixing member 71 may be formed to have a larger size than the limiting member 52 so as to protrude in both directions of the limiting member 52 . The second limiting member 72 and the second fixing member 71 may be integrally formed.

The second limiting member 72 may include a second limiting surface 721 .

The second limiting surface 721 is in contact with the barrel 2 to limit the rotation of the barrel 2 . The second limiting surface 721 may be formed to be flat. In this case, the barrel 2 may include a second contact surface 22 (shown in FIG. 5 ) formed to be flat. The second barrel bracket 7 may be installed on the injection bracket 4 so that the second limiting surface 721 is in contact with the second contact surface 22 . Accordingly, the second limiting surface 721 is in contact with the second contact surface 22 to support the second contact surface 22 . Accordingly, the second limiting member 72 may restrict the rotation of the barrel 2 by supporting the barrel 2 through the second limiting surface 721 . The second contact surface 22 may be formed to be positioned to be spaced apart from the first contact surface 21 in the first direction (FD arrow direction). The barrel 2 may be formed such that a portion other than the portion on which the second contact surface 22 and the first contact surface 21 are formed forms a curved surface.

The second limiting surface 721 may be implemented such that the entire surface is in contact with the entire surface of the second contact surface 22 . In this case, when the second limiting surface 721 is in contact with the second contact surface 22 , there is no gap between the second limiting surface 721 and the second contact surface 22 , so the second limiting member Reference numeral 72 may block rotation of the barrel 2 due to the rotation of the injection screw 3 . Accordingly, the injection device 1 according to the present invention further improves the accuracy of the operation of melting and measuring the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping device 200 . can do it Therefore, the injection device 1 according to the present invention can contribute to further improving the quality of the injection product.

11 , the second limiting surface 721 and the second contact surface 22 may be disposed parallel to the horizontal direction. Although not shown, the second limiting surface 721 and the second contact surface 22 may be inclined with respect to the horizontal direction. In this case, the second limiting surface 721 and the second contact surface 22 may be disposed to be inclined at the same angle relative to the horizontal direction so that their entire surfaces may be in contact with each other.

9, 12 and 13 , the second limiting member 72 may include a plurality of the second limiting surfaces 721 .

The second limiting surfaces 721 may be connected to each other so that an angle 721a between them forms an obtuse angle. Accordingly, in contrast to the case in which the second limiting surfaces 721 are connected so that the angles 721a between them form an acute or right angle, the second limiting surfaces 721 have an obtuse angle between the second limiting surfaces 721 and each other. By being connected to achieve this, the entrance area for inserting the second contact surface 22 between the second limiting surfaces 721 may be widened. Accordingly, in the injection device 1 according to the present invention, the second limiting surfaces 721 are connected to each other so that an angle 721a between them forms an obtuse angle, so that the second limiting surface 721 is the second contact surface ( 22) has the advantage of improving the easiness of the operation of installing the second barrel bracket (7) to the injection bracket (4).

When the second limiting member 72 includes a plurality of the second limiting surfaces 721 , the barrel 2 may include a plurality of the second contact surfaces 22 . In this case, the barrel 2 may include the same number of second contact surfaces 22 as the number of second limiting surfaces 721 of the second limiting member 72 . Accordingly, in the injection device 1 according to the present invention, the second limiting member 72 increases the supporting area for supporting the barrel 2, thereby allowing the barrel 2 to pass through the second limiting member 72 . It is possible to increase the constraining force that restricts the rotation of Accordingly, the injection device 1 according to the present invention further improves the accuracy of the operation of melting and measuring the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping device 200 . Not only can it be done, but it can also contribute to further improving the quality of injection products.

For example, as shown in FIG. 12 , the second limiting member 72 may be implemented to include two second limiting surfaces 721 and 721 ′. In this case, the second limiting surfaces 721 and 721' may be connected to each other so that the angle between them 721a forms an obtuse angle. The barrel 2 may be implemented to include two second contact surfaces 22 , 22 ′. The second contact surfaces 22 and 22' may be connected to each other to correspond to the second limiting surfaces 721 and 721'. The second barrel bracket 7 is shown in the injection bracket 4, FIG. 9 so that the second contact surfaces 22 and 22' are inserted into the space located between the second limiting surfaces 721 and 721'. shown) can be installed. In this case, the entire surface of each of the second limiting surfaces 721 and 721 ′ may be in contact with the entire surface of each of the second contact surfaces 22 and 22 ′. In FIG. 12, both of the two second limiting surfaces 721 and 721' are shown to be inclined with respect to the transverse direction, but the present invention is not limited thereto, and any of the two second limiting surfaces 721 and 721' One second limiting surface 721 may be disposed parallel to the horizontal direction, and the other second limiting surface 721' may be disposed inclined with respect to the horizontal direction.

For example, as shown in Fig. 13, the second limiting member 72 may be implemented to include three second limiting surfaces 721, 721', and 722". In this case, the second limiting surface The angles 721, 721', and 722" may be connected to each other to form an obtuse angle between the angles 721a and 721a', respectively. The barrel 2 may be embodied to include three second contact surfaces 22, 22', 22". The second contact surfaces 22, 22', 22" are the second limiting surfaces (721, 721', 722") may be connected to each other so as to be formed. The second barrel bracket 7 is located in the space located between the second limiting surfaces 721, 721', 722". It may be installed on the injection bracket 4 (shown in FIG. 3) so that the second contact surfaces 22, 22', 22" are inserted. In this case, the second limiting surfaces 721, 721', The entire surface of each 722" may contact the entire surface of each of the second contact surfaces 22, 22', 22". In FIG. 13, three second limiting surfaces 721, 721 ', 722"), any one of the second limiting surfaces 721 is disposed parallel to the horizontal direction, and the other two second limiting surfaces 721', 722" are inclined with respect to the horizontal direction. Although shown to be arranged to be oblique, the present invention is not limited thereto, and all of the three second limiting surfaces 721 , 721 ′, and 722 ″ may be arranged to be inclined with respect to the horizontal direction.

Although not shown, the second limiting member 72 may be implemented to include four or more second limiting surfaces 721 . In this case, the barrel 2 may be implemented to include four or more second contact surfaces 22 .

Here, the second limiting member 72 may be implemented to restrict the rotation of the barrel 2 by supporting the upper surface of the barrel 2 as shown in FIGS. 11 to 13 . In this case, the second contact surface 22 may be formed to form an upper surface of the barrel 2 . Although not shown, the second limiting member 72 may be implemented to restrict the rotation of the barrel 2 by supporting the side surface of the barrel 2 . In this case, the second contact surface 22 may be formed to form a side surface of the barrel 2 . The second limiting member 72 may be implemented to restrict the rotation of the barrel 2 by supporting the lower surface of the barrel 2 . In this case, the second contact surface 22 may be formed to form a lower surface of the barrel 2 .

9 and 10 , the second barrel bracket 7 may be formed to have a shorter length (7L) than the first barrel bracket 5 based on the first direction (FD arrow direction). have. That is, based on the first direction (FD arrow direction), the length 7L of the second barrel bracket 7 is shorter than the length 5L of the first barrel bracket 5 . In this case, the hopper hole 53 may be formed in the first barrel bracket 5 . The hopper hole 53 may not be formed in the second barrel bracket 7 . Accordingly, the injection device 1 according to the present invention implements the first barrel bracket 5 in which the hopper hole 53 is formed to be thicker than the second barrel bracket 7, so that the first barrel bracket ( 5) may be implemented to have sufficient support to limit the rotation of the barrel 2 even in a state in which the hopper hole 53 is formed. In addition, the injection device 1 according to the present invention implements the second barrel bracket 5 without the hopper hole 53 to be thinner than the first barrel bracket 5 in which the hopper hole 53 is formed, The second barrel bracket 7 is implemented to be thicker than the supporting force required for the second barrel bracket 7 to limit the rotation of the barrel 2 , so that material cost can be prevented from being wasted.

9 and 14 , in the injection device 1 according to a modified embodiment of the present invention, the barrel 2 rotates due to the rotation of the injection screw 3 using the injection bracket 4 . It can also be implemented to limit what can be done. In this case, the injection bracket 4 may include a restraining surface 41 .

The restraining surface 41 is to support the barrel 2 to limit the rotation of the barrel 2 . The restraining surface 41 may support a portion inserted into the insertion groove 42 of the injection bracket 4 in the barrel 2 . The insertion groove 42 is into which the barrel 2 is inserted, and may be formed through an upper portion of the injection bracket 4 . The insertion groove 42 may be formed to be connected to the receiving hole. The barrel 2 may be installed to be positioned inside the injection bracket 4 by being inserted into the insertion groove 42 . When the barrel 2 is inserted into the insertion groove 42 , the first barrel bracket 5 supports the upper surface of the barrel 2 inserted into the insertion groove 42 to fix the barrel 2 . It may be installed on the injection bracket (4) to do so. In this case, the constraining surface 41 may be formed to form a curved surface.

The restraining surface 41 supports a portion of the barrel 2 inserted into the insertion groove 42 , thereby limiting the rotation of the barrel 2 according to the rotation of the injection screw 3 . Accordingly, the injection device 1 according to the modified embodiment of the present invention can achieve the following operational effects.

First, the injection device 1 according to a modified embodiment of the present invention uses the constraining surface 41 of the injection bracket 4 to rotate the barrel 2 due to the rotation of the injection screw 3 . can be limited to Accordingly, the injection apparatus 1 according to a modified embodiment of the present invention is used for the operation of melting and metering the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping device 200 . accuracy can be improved. Therefore, the injection device 1 according to the modified embodiment of the present invention can contribute to improving the quality of the injection product.

Second, the injection device 1 according to a modified embodiment of the present invention is implemented so that the injection bracket 4 has a limiting function for limiting the rotation of the barrel 2 using the restraining surface 41 . can Therefore, the injection apparatus 1 according to the modified embodiment of the present invention can reduce material cost as well as inject the barrel 2 when compared to the embodiment in which the limiting function is implemented through a separate configuration. It is possible to improve the easiness of the installation operation of installing the bracket (4) and the separation operation of separating the barrel (2) from the injection bracket (4).

The restraining surface 41 may be formed to form a plane. In this case, the barrel 2 may include a support surface 23 (shown in FIG. 14 ) formed to be flat. The barrel 2 may be inserted into the insertion groove 42 so that the support surface 23 is in contact with the restraint surface 41 . Accordingly, the restraining surface 41 is brought into contact with the support surface 23 to support the support surface 23 . Accordingly, the injection bracket 4 supports the barrel 2 through the restraining surface 41 , thereby limiting the rotation of the barrel 2 . The barrel 2 may be formed such that a portion other than the portion on which the support surface 23 is formed forms a curved surface.

The restraining surface 41 may be implemented such that the entire surface is in contact with the entire surface of the support surface 23 . In this case, when the restraining surface 41 is in contact with the support surface 23, there is no gap between the restraining surface 41 and the support surface 23, so that the injection bracket 4 is It is possible to prevent the barrel 2 from rotating due to the rotation of 3). Accordingly, the injection apparatus 1 according to a modified embodiment of the present invention is used for the operation of melting and metering the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping device 200 . accuracy can be further improved. Therefore, the injection device 1 according to the modified embodiment of the present invention can contribute to further improving the quality of the injection product.

Referring to FIG. 14 , the restraining surface 41 and the supporting surface 23 may be disposed parallel to the horizontal direction. Although not shown, the restraining surface 41 and the supporting surface 23 may be disposed to be inclined with respect to the horizontal direction. In this case, the restraining surface 41 and the supporting surface 23 may be disposed to be inclined at the same angle relative to the horizontal direction so that the entire surface may be in contact with each other.

Referring to FIGS. 9, 15 and 16 , the injection bracket 4 may include a plurality of the restraining surfaces 41 .

The constraining surfaces 41 may be connected to each other so that the angle between them 41a forms an obtuse angle. Accordingly, in contrast to the case in which the restraining surfaces 41 are connected to form an acute or right angle between the restraining surfaces 41, the restraining surfaces 41 are connected so that the angle 41a between them forms an obtuse angle. As a result, the inlet area for inserting the support surface 23 between the restraining surfaces 41 can be widened. Therefore, in the injection device 1 according to a modified embodiment of the present invention, the restraining surfaces 41 are connected so that the angle between them 41a forms an obtuse angle, so that the restraining surface 41 is the support surface ( 23) has the advantage of improving the easiness of the operation of installing the barrel (2) to the injection bracket (4) so as to be in contact.

When the injection bracket 4 includes a plurality of the restraining surfaces 41 , the barrel 2 may include a plurality of the support surfaces 23 . In this case, the barrel 2 may include the same number of support surfaces 23 as the number of restraining surfaces 41 of the injection bracket 4 . Therefore, in the injection device 1 according to a modified embodiment of the present invention, the injection bracket 4 increases the support area for supporting the barrel 2, so that the barrel 2 through the injection bracket 4 ) can increase the limiting force limiting the rotation. Accordingly, the injection apparatus 1 according to a modified embodiment of the present invention is used for the operation of melting and metering the molding material in the barrel 2 and the operation of supplying the molding material in the molten state to the clamping device 200 . Not only can the accuracy of the injection molding be further improved, but it can also contribute to further improving the quality of injection products.

For example, as shown in FIG. 15 , the injection bracket 4 may be implemented to include two restraining surfaces 41 and 41 ′. In this case, the constraining surfaces 41 and 41' may be connected to each other so that the angle between them 41a forms an obtuse angle. The barrel 2 may be embodied to include two support surfaces 23 , 23 ′. The support surfaces 23 and 23' may be connected to each other so as to correspond to the restraining surfaces 41 and 41'. The barrel 2 may be installed on the injection bracket 4 so that the support surfaces 23 and 23' are inserted into the space located between the restraining surfaces 41 and 41'. In this case, the entire surface of each of the restraining surfaces 41 and 41 ′ may be in contact with the entire surface of each of the support surfaces 23 and 23 ′. In FIG. 15 , both of the two restraining surfaces 41 and 41 ′ are illustrated as being inclined with respect to the transverse direction, but the present invention is not limited thereto, and any one of the two restraining surfaces 41 and 41 ′ is illustrated. Reference numeral 41 may be arranged parallel to the transverse direction, and the other restraining surface 41' may be arranged to be inclined with respect to the transverse direction.

For example, as shown in Fig. 16, the injection bracket 4 may be implemented to include three restraining surfaces 41, 41' and 41". In this case, the restraining surfaces 41 and 41' , 41") may be connected to each other to form an obtuse angle between the angles 41a and 41a'. The barrel 2 may be embodied to include three bearing surfaces 23, 23', 23". The bearing surfaces 23, 23', 23" are the restraining surfaces 41, 41 ', 41"). The barrel 2 may be formed in a space between the restraining surfaces 41, 41' and 41" and the support surfaces 23 and 23'. , 23") may be installed on the injection bracket 4 to be inserted. In this case, each of the restraining surfaces 41, 41', and 41" has the entire front surface of the support surfaces 23 and 23 ', 23") can be in contact with the entire surface. In FIG. 16, any one of the three restraining surfaces 41, 41', and 41" has a restraining surface 41 in the transverse direction. Although it is shown that the remaining two first limiting surfaces 521' and 521" are disposed in parallel and inclined with respect to the transverse direction, the present invention is not limited thereto and the three restraining surfaces 41, 41', 41") may be arranged to be inclined with respect to the transverse direction.

Although not shown, the injection bracket 4 may be implemented to include four or more restraining surfaces 41 . In this case, the barrel 2 may be implemented to include four or more support surfaces 23 .

Here, the injection bracket 4 may be implemented to limit the rotation of the barrel 2 by supporting the lower surface of the barrel 2 as shown in FIGS. 14 to 16 . In this case, the support surface 23 may be formed to form a lower surface of the barrel 2 . Although not shown, the injection bracket 4 may be implemented to limit the rotation of the barrel 2 by supporting the side surface of the barrel 2 . In this case, the support surface 23 may be formed to form a side surface of the barrel 2 .

Although not shown, the injection device 1 according to a modified embodiment of the present invention may be implemented to limit the rotation of the barrel 2 by using the injection bracket 4 and the first barrel bracket 5 . have. For example, in the injection device 1 according to a modified embodiment of the present invention, the injection bracket 4 supports the lower surface of the barrel 2 using the restraining surface 41 and at the same time the first barrel bracket (5) may be implemented to restrict the rotation of the barrel 2 by supporting the upper surface of the barrel 2 using the first limiting surface 521 . In this case, the first contact surface 21 and the support surface 23 may be formed on the barrel 2 . The first contact surface 21 , the support surface 23 , the restraining surface 41 , and the first limiting surface 521 may be formed to be planar, respectively.

Although not shown, the injection device 1 according to a modified embodiment of the present invention may be implemented to limit the rotation of the barrel 2 using the injection bracket 4 and the second barrel bracket 7 . have. For example, in the injection device 1 according to a modified embodiment of the present invention, the injection bracket 4 supports the lower surface of the barrel 2 using the restraining surface 41 and at the same time the second barrel bracket (7) may be implemented to restrict the rotation of the barrel 2 by supporting the upper surface of the barrel 2 using the second limiting surface 721 . In this case, the second contact surface 22 and the support surface 23 may be formed on the barrel 2 . The second contact surface 22 , the support surface 23 , the restraining surface 41 , and the second limiting surface 721 may be formed to be planar, respectively.

Although not shown, the injection device 1 according to a modified embodiment of the present invention uses all of the injection bracket 4 , the first barrel bracket 5 , and the second barrel bracket 7 to the barrel It may be implemented to limit the rotation of (2). In this case, the injection bracket 4 may include a restraining surface 41 located below the first barrel bracket 5 and a restraining surface 41 located below the second barrel bracket 7 . have.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and it is common in the technical field to which the present invention pertains that various substitutions, modifications, and changes are possible without departing from the technical spirit of the present invention. It will be clear to those who have the knowledge of

1: injection device 2: barrel
3 : Injection screw 4 : Injection bracket
5: 1st barrel bracket 6: Injection drive part
7: 2nd barrel bracket 21: 1st contact surface
22: second contact surface 23: support surface
41: constraint surface 42: insertion groove
51: first fixing member 52: first limiting member
53: hopper hole 71: second fixing member
72: second limiting member 511: first fixing hole
521: first limiting surface 711: second fixed hole
721: second limiting plane

Claims (14)

Barrel (2) for storing the molding material;
an injection screw (3) installed to be located inside the barrel (2);
an injection bracket 4 on which the barrel 2 is installed; and
a first barrel bracket (5) installed on the injection bracket (4) to support the barrel (2) installed on the injection bracket (4);
The first barrel bracket (5) includes a first fixing member (51) installed to be fixed to the injection bracket (4), and a first limiting member (52) formed to protrude from the first fixing member (51). includes,
The first limiting member 52 supports a portion of the barrel 2 located inside the injection bracket 4 to limit the rotation of the barrel 2 according to the rotation of the injection screw 3,
a second barrel bracket (7) installed on the injection bracket (4) at a position spaced apart from the first barrel bracket (5);
The second barrel bracket (7) includes a second fixing member (71) installed to be fixed to the injection bracket (4), and a second limiting member (72) formed to protrude from the second fixing member (71). includes,
The second limiting member 72 supports a part of the barrel 2 that is spaced apart from the part supported by the first limiting member 52 to prevent the barrel 2 from rotating according to the rotation of the injection screw 3 . Injection device, characterized in that the rotation is limited. According to claim 1,
The first limiting member 52 includes a first limiting surface 521 formed to form a plane,
The barrel 2 includes a first contact surface 21 formed to be flat, wherein the first contact surface 21 is in contact with the first limiting surface 521 to be supported by the first limiting member 52 . Injection device, characterized in that. 3. The method of claim 2,
The first limiting member 52 includes a plurality of the first limiting surfaces 521,
The injection apparatus, characterized in that the first limiting surfaces (521) are connected so that an included angle (521a) between each other forms an obtuse angle (鈍角). 4. The method of claim 2 or 3,
The first limiting member 52 includes a plurality of the first limiting surfaces 521,
The barrel 2 includes a plurality of the first contact surfaces 21 , and includes the same number of first contact surfaces 21 as the number of first limiting surfaces 521 of the first limiting member 52 . Injection device, characterized in that. According to claim 1,
The first barrel bracket 5 includes a hopper hole 53 formed through the first fixing member 51 and the first limiting member 52 , and a hopper installed to be connected to the hopper hole 53 . Injection device, characterized in that supporting the. delete According to claim 1,
The second limiting member 72 includes a second limiting surface 721 formed to form a plane,
The barrel 2 includes a second contact surface 22 formed to be flat, wherein the second contact surface 22 is in contact with the second limiting surface 721 to be supported by the second limiting member 72 . Injection device, characterized in that. 8. The method of claim 7,
The second limiting member 72 includes a plurality of the second limiting surfaces 721,
The injection apparatus, characterized in that the second limiting surfaces (721) are connected to each other so that an angle (721a) between them forms an obtuse angle. 9. The method of claim 7 or 8,
The second limiting member 72 includes a plurality of the second limiting surfaces 721,
The barrel 2 includes a plurality of the second contact surfaces 22, and includes the same number of second contact surfaces 22 as the number of second limiting surfaces 721 of the second limiting member 72. Injection device, characterized in that. According to claim 1,
The first barrel bracket (5) includes a hopper hole (53) formed through the first fixing member (51) and the first limiting member (52),
The second barrel bracket 7 is installed on the injection bracket 4 at a position spaced apart from the first barrel bracket 5 in a first direction, and the first barrel bracket 5 is installed based on the first direction. ) injection device, characterized in that it is formed with a shorter length than that. According to claim 1,
The injection bracket (4) supports the insertion groove (42) into which the barrel (2) is inserted, and the portion inserted into the insertion groove (42) in the barrel (2) to prevent rotation of the injection screw (3). and a restraining surface (41) for limiting the rotation of the barrel (2). 12. The method of claim 11,
The barrel 2 includes a support surface 23 formed to be flat, and is inserted into the insertion groove 42 so that the support surface 23 is in contact with the restraint surface 41,
The constraining surface (41) is formed to form a plane, the injection apparatus, characterized in that by supporting the support surface (23) to limit the rotation of the barrel (2). 13. The method of claim 12,
The injection bracket (4) includes a plurality of the constraining surfaces (41),
The injection device, characterized in that the restraining surfaces (41) are connected to each other so that the angle (41a) between each other to form an obtuse angle. 14. The method of claim 12 or 13,
The injection bracket (4) includes a plurality of the constraining surfaces (41),
The barrel (2) includes a plurality of the support surfaces (23), and the injection bracket (4) includes the same number of support surfaces (23) as the number of the restraining surfaces (41) of the injection bracket (4). .

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