KR100906376B1 - Many Colors Injection Machine with Combination nozzle - Google Patents

Abstract

The present invention relates to a multi-color injection molding machine having a composite nozzle, and more particularly, a resin nozzle has a single nozzle formed on the composite nozzle by mounting a plurality of injection tubes injecting resin melts of different colors into one composite nozzle. The nozzle head of the composite nozzle having the discharge port formed therein is detachably formed to be replaced with a nozzle head having various discharge shapes. In particular, multi-color resin melts supplied from a plurality of injection tubes are mixed with resin melts of different colors adjacent to each other in the process of being discharged according to the shape of the inner flow path of the mounted nozzle head, thereby partially mixing the colors, thereby forming an injection molded product having various patterns. It relates to a multicolor injection machine having a composite nozzle to be produced.

The multi-color injection molding machine of the present invention is a multi-color injection molding machine for manufacturing a molded product by injecting a resin melt, a nozzle body having a plurality of body flow paths formed therein, one end is coupled to the nozzle body and extending in communication with the body flow path inside An extension nozzle formed with a flow path; A combined nozzle comprising a nozzle head coupled to an end of the extension nozzle and injecting a resin melt supplied from a flow path through an outlet; A tubular main body coupled to the nozzle body, a hopper mounted on the rear of the main body and supplying the raw material into the main body, a heat transfer part configured to heat and melt the raw material formed and formed in the inner circumference of the main body in a liquid state, and It is configured to include; injection injection tube and auxiliary injection tube consisting of a screw for injecting the melt into the injection port in front of the body.

Multi-color Injection Molding Machine, Composite Nozzle, Injection Pipe, Nozzle Head, Resin Melt

Description

Many Colors Injection Machine with Combination nozzle

The present invention relates to a multi-color injection molding machine having a composite nozzle, and more particularly, a resin nozzle has a single nozzle formed on the composite nozzle by mounting a plurality of injection tubes injecting resin melts of different colors into one composite nozzle. The nozzle head of the composite nozzle having the discharge port formed therein is detachably formed to be replaced with a nozzle head having various discharge shapes. In particular, multi-color resin melts supplied from a plurality of injection tubes are mixed with resin melts of different colors adjacent to each other in the process of being discharged according to the shape of the inner flow path of the mounted nozzle head, thereby partially mixing the colors, thereby forming an injection molded product having various patterns. It relates to a multicolor injection machine having a composite nozzle to be produced.

Republic of Korea Patent Application 10-2006-0126450 (December 12, 2006), multi-color injection molding machine and injection method using the same

Plastic injection machine, which is generally a synthetic resin, has an injection cylinder or injection tube in which a resin melt is embedded, and moves the resin melt to a front injection hole by pressurizing a piston mounted in the cylinder or a screw mounted in the injection tube. The injection hole is brought into contact with the mold, and the melted resin solution is injected into the mold to manufacture a molded article through cooling. Such an injection molding machine is provided with heat transfer means to maintain a predetermined temperature to prevent the resin melt in the cylinder or the injection tube from solidifying, and increases the calorific value of the heat transfer means in the cylinder to feed raw materials into powder or granular particles. After melting is done in the injection.

As described above, the conventional injection molding machine is classified into a cylinder type and a screw type, and has a single receiving part (cylinder, tube) to produce a monochromatic injection molding. In addition, the injection molding having two or more colors is manufactured by manufacturing each color part separately and attaching them, so that the number of injection cylinders increases according to the added color, thereby increasing the facility cost. In other words, to produce an injection molding having two colors, a separate nozzle and a separate cylinder are required.

Therefore, in order to manufacture an injection molding having a multi-color using the single injection machine without the attachment process is provided with a plurality of injection tube / main cylinder and a plurality of auxiliary injection tube / sub-cylinder in close proximity, the injection path of the auxiliary injection tube / sub-cylinder It is located near the exit port of the exit tube / main cylinder, so that the resin melt with the color introduced from the auxiliary injection tube / auxiliary cylinder is injected together when the injection tube / main cylinder is ejected.

The improved injection machine has the advantage of realizing a variety of colors using a single injection machine, but there is a disadvantage that it is difficult to achieve color smoothly, such as the shape of the malformation and gradually changing color toward one side in addition to the predetermined form. .

Therefore, the Korean Patent Application No. 10-2006-0126450 (December 12, 2006) filed by the present applicant as a method for imparting the various colors has been filed for a multi-color injection machine and an injection method using the same.

As shown in Figure 10, the conventional gun is a resin melt supplied from the auxiliary injection tube when the resin melt of the injection tube is discharged by communicating a plurality of auxiliary injection tube (3) in close proximity to the injection port of the injection tube (2) It is to be discharged together to produce an injection molding having a variety of colors. That is, the gun is discharged while mixing the resin melt of the injection pipe and the resin melt of the auxiliary injection pipe in a space adjacent to the injection port inside the injection pipe to provide a variety of colors.

The conventional injection molding machine 1 is controlled by the multi-colored resin mixture through a plurality of hoppers 4 mounted on the auxiliary injection tube 3 and the injection tube 2 by changing the pattern of the mixing pattern is limited in the production of a variety of patterns There is a need for research on multicolor injection molding machines that can provide patterns.

Therefore, the multi-color injection machine having a composite nozzle according to the present invention is designed to solve the above problems,

Claims [1] A multicolor injection molding machine for manufacturing a molded article by injecting a molten resin, comprising: a nozzle body having a plurality of body flow paths formed therein, and an extension nozzle having one end coupled to the nozzle body and having an extension flow path communicating therewith; A combined nozzle comprising a nozzle head coupled to an end of the extension nozzle and injecting a resin melt supplied from a flow path through an outlet; A tubular main body coupled to the nozzle body, a hopper mounted on the rear of the main body and supplying the raw material into the main body, a heat transfer part configured to heat and melt the raw material formed and formed in the inner circumference of the main body in a liquid state, and It is configured to include; injection injection tube and auxiliary injection tube consisting of a screw for injecting the melt into the injection port in front of the body.

The nozzle body may have a plurality of rod heaters built therein to prevent the resin melt passing through the flow path formed therein, and the nozzle head provides a variety of internal flow paths so that the resin melt moves along the flow path. This can be done.

In addition, the injection pipe and the auxiliary injection pipe coupled to the composite nozzle is moved back and forth by the transfer means to be intermittent with the composite nozzle to enable selective color mixing. At this time, the ball check valve may be further installed on the inner flow path of the composite nozzle to prevent the injection of the molten resin flows back.

As described in detail above, the multi-color injection machine having the composite nozzle of the present invention,

Multiple injection tubes for discharging resin melts of different colors are mounted on a single composite nozzle, and the nozzle head, which is an outlet of the composite nozzle, is provided in a number of forms, and the nozzle head can be easily changed and mounted. It provides injection molding with various shapes and colors by changing the point of time when each color is mixed and the shape of the mixing movement distance and the moving flow path such as to control the injection tube and the composite nozzle by using. It is possible to provide a useful device.

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

1A is a cross-sectional view of a multicolor injection machine 10 having a composite nozzle according to a preferred embodiment of the present invention. As shown, the multi-color injection machine of the present invention is composed of a composite nozzle 20, an injection pipe 60 coupled to the composite nozzle, and a plurality of auxiliary injection pipes 61.

The composite nozzle 20 includes a nozzle body 30 having a plurality of body flow paths 32 formed therein, an extension nozzle 50 coupled to one side of the nozzle body, and a nozzle head coupled to one end of the extension nozzle. It consists of 40. The body flow path 32 formed in the nozzle body 30 is formed to penetrate from the rear surface and / or the side surface of the nozzle body to the front surface, and the injection pipe 60 and the auxiliary injection pipe 61 are coupled to each surface. That is, the sea flow path is formed to penetrate from the surface where the injection pipe and the auxiliary injection pipe is coupled to the portion on which the front extension nozzle 50 is mounted. At this time, the coupling of the injection pipe 60, the auxiliary injection pipe 61, the nozzle head 40, the extension nozzle 50 and the nozzle body 30 is fastened with a bolt as shown, or detachable by various coupling means Possibly combined.

In addition, the nozzle body 30 has a plurality of rod heaters 31 installed therein as shown in FIG. 1B to prevent solidification of the resin melt which is moved along the body flow path 32 and to liquefy some solid grains. You can do that. The rod heater 31 may be installed at a predetermined interval inside the nozzle body 30 or may be installed in a manner in which the rod heater 31 is arranged in a portion close to the body flow path 32 as shown.

Next, the extension nozzle 50 having one end installed in the nozzle body has an extension passage 510 communicating therewith with the body passage of the nozzle body, and an heat transfer part 520 is installed at the outer circumference to provide an internal extension passage. The resin melt, which is moved along, is prevented from solidifying, and flanges are formed at both ends of the extension nozzle so as to be bolted to the nozzle body and the nozzle head.

In addition, the nozzle head 40 receives the resin melt from the extension nozzle 50 formed in the nozzle body and discharges it through the outlet 41 in front of the nozzle head, and the nozzle head has a variety of shapes such as a triangular pyramid, a square cylinder, or a cylinder. It can be formed in the form. Description of such a nozzle head will be described in detail below.

Next, the injection pipe 60 and the auxiliary injection pipe 61 has a tubular body 610, one end of which is coupled to the nozzle body 30, and the other end opposite to the rear end of the body, that is, the end in contact with the nozzle body. A hopper 620 mounted at an adjacent portion to inject the synthetic resin material into the main body, a heat transfer part 630 for melting the introduced raw material installed at the inner circumference of the main body, and the melted resin melt in front of the nozzle body. It consists of a screw 640 for moving injection in the direction of the injection hole in contact with. Here, the heat transfer part 630 may be connected to the outer periphery of the tube to be heated, the screw 640 is equipped with a motor (M) at one end so that the rotation is made by the power of the motor, the hopper 620 may be installed in one or a plurality of the main body to put a variety of colors to the hopper by putting a different support fee having a different color. In addition, the injection pipe 60 and the auxiliary injection pipe 61 has the same structure, the same diameter of the main body to supply the resin melt to the composite nozzle 20 in the same amount, or as shown in the injection pipe ( 60) is formed to a large diameter, and the auxiliary injection pipe 61 is formed to have a relatively small diameter so that the amount of the resin melt injected from the injection pipe can be larger than the amount of resin melt injected from the auxiliary injection pipe.

In addition, it is possible to selectively adjust the resin melt injection amount from each injection tube by adjusting the rotational speed of the screw 640 by adjusting the driving force of the motor (M). Rotational speed control of the screw 640 can be made using a general speed reducer, the detailed description of which is omitted in the present patent.

Meanwhile, as shown in FIGS. 3A and 3B, the nozzle head, which is a component of the composite nozzle 20 of the present invention, is provided with the bottom surface of the triangular pyramid in contact with the extension nozzle, and a plurality of head passages 42 are formed therein. By communicating with the extension passage 510 of the extension nozzle 50, the resin melt discharged from the extension passage is discharged to the outlet 41 in front of the nozzle head along the head passage. At this time, the head channel of the nozzle head 40a is formed so as to be in communication with the extension channel of the extension nozzle in the direction of the discharge port 41, and each head channel in the portion adjacent to the discharge port 41 is joined to the discharge port. Communicate with When formed in this way, resin melts having different colors from each of the injection molding machines 60 and 61 are joined along the flow paths and joined at the confluence part 43 adjacent to the discharge port 41 of the nozzle head 40a. Ejected as mixing takes place. Therefore, the longer the length of the confluence portion 43 in which the head flow paths are combined, the more the color mixture of the resin melt is made. In order to further achieve the color mixing, the confluence portion 43 and the outlet ( 41) the length between them can be made long.

In addition, another form of the nozzle head is that the head passage 42 is directly connected to the outlet 41 without a confluence, as shown in FIG. That is, the discharge port 41 is divided as the number of head flow paths so that the resin melt proceeds independently to the discharge port and is mixed with the adjacent resin melt while being injected through the discharge port. In such a structure, the resin melt is mixed, and the time taken for the mixing is short, so that the boundary of each color can be formed relatively clearly.

Next, the nozzle head has a hollow portion formed therein, as shown in FIG. 5, so that the resin melt discharged from the extension flow path of the combined extension nozzle is immediately joined inside the nozzle head 40c to be injected into the outlet 41. Can be. When the nozzle head is used, a wide range of colors can be formed, and the color boundary becomes indefinite by mixing with adjacent colors.

6A and 6B, the fixed resin 44 and the stirring blade 45 are mounted inside the nozzle head 40c, and the mixed resin melt is stirred by the stirring blade while proceeding to the outlet 41. This can be done so that forced mixing is achieved. That is, the fixed shaft 44 is installed in the hollow portion of the nozzle head 40c in a linear orthogonal direction connecting the outlet 41 and the extension flow path of the extension nozzle, and the stirring blade 45 is provided on the fixed shaft. The resin melt is pushed by the injection pressure is discharged to the discharge port 41 while hitting the stirring blade 45, the stirring blade is rotated, the resin melt discharged by the rotating stirring blade can be stirred. In this case, in order to easily rotate the stirring blade 45, the fixed shaft 44 may be installed to be biased toward one side rather than the center of the nozzle head 40c so that the pressure transmitted to the left and right sides of the fixed shaft may be differently applied. .

In addition, as shown in FIG. 7, a plurality of guide blades 46 may be formed in a spiral in the nozzle head 40e to allow injection through the outlet 41 while the resin melt is rotated. When the guide blade 46 is formed, the resin melt that proceeds to the center of the nozzle head 40e is hardly affected, and the resin melt that is moved along the inner circumference is injected while being rotated by the guide blade 46 to eject the discharge hole ( 41) the center and the outside may have different patterns of colors. Inside the nozzle head 40e, guide grooves other than guide blades may be formed in a spiral to obtain the above effect.

The nozzle head 40f shown in FIG. 8A further includes a cylindrical extension part 410 at a portion coupled with the extension nozzle, and inserts filter members 48a and 48b inside the extension part so that the resin melt is mixed. can do. The filter member may be used as a disk filter member 48a having a plurality of through holes as shown in FIG. 8B or as a mesh plate filter member 48b as shown in FIG. 8C. In addition, a key 411 is formed in the axial direction on the inner circumference of the nozzle head 40f to fix the filter member, and a key groove 481 corresponding to the key is formed on one side of the filter member so that the coupling is performed. can do.

In addition, the filter members 48a and 48b may be installed in duplicate. The two filters to be inserted are installed side by side in the extension part 410 of the nozzle head 40f, or as shown in FIG. 8D, a filter member having a small diameter is installed inside the nozzle head having a taper angle, and in the extension part. Each of the filter members having a large diameter may be installed to allow the resin melt to be mixed while passing through the filter member. In this case, a stepped portion 401 may be formed on the inner surface having the tapered angle so that the filter member having a small diameter may be placed in a proper position.

Next, Figure 9a is a schematic view showing a multi-color injection machine according to another embodiment of the present invention, as shown, the injection pipe 60 and the auxiliary injection pipe 61 is coupled to one surface of the nozzle body 30 of the composite nozzle By using a conveying means (not shown) using any one of a hydraulic device, a pneumatic device, and a manual mechanical device, the injection pipe or the auxiliary injection pipe may be advanced back and forth so as to control the composite nozzle.

As described above, when intermittent by the forward and backward movement, the injection pipe 60 is supplied with the molten resin to the composite nozzle while the auxiliary injection pipe 61 is reversed by the transfer means so that the maintenance or removal can be easily performed. can do.

At this time, since each flow path is connected, the supplied resin melt can be flowed back to the flow path connected to the injection pipe which stopped the supply, so that the ball check valve 33 is mounted on the flow paths 32 and 510 as shown in FIG. To prevent backflow. In addition, since the injection pressure of the injection pipe and the auxiliary injection pipe can be flowed back from the flow path having a strong injection pressure to the flow path having a relatively weak pressure, it is possible to prevent this by installing a ball check valve. As a means for preventing the reverse flow, it is possible to apply various known check valves such as a check valve of a plate in addition to the ball check valve described above.

In addition, the above-mentioned example is only an example to demonstrate this invention. Therefore, it is obvious that the ordinary skilled in the art to which the present invention pertains uses the partial change with reference to the detailed description.

Figure 1a is a cross-sectional view showing a multi-color injection machine having a composite nozzle according to a preferred embodiment of the present invention.

Figure 1b is a cross-sectional view showing an example of a nozzle body according to the present invention.

2 is a perspective view showing a connecting member according to the present invention.

3A and 3B are a perspective view and a sectional view of a nozzle head according to the present invention.

4 to 7 are cross-sectional views showing another embodiment of the nozzle head of the present invention.

Figure 8a is a perspective view showing a nozzle head formed with an extension in accordance with the present invention.

8B and 8C are perspective views illustrating a filter member embedded in the nozzle head of FIG. 8A.

8D is a sectional view of the nozzle head in which the filter member is provided in duplicate.

9a and 9b are cross-sectional views showing a multi-color injection machine having a composite nozzle of another type according to the present invention.

10 is a cross-sectional view showing a conventional multi-color injection machine.

<Explanation of symbols for the main parts of the drawings>

10: multi-color injection machine 20: composite nozzle

30: nozzle body 31: rod heater

32: body euro 33: ball check valve

40, 40a to 40c, 40e, 40f: nozzle head 41 outlet port

42: head euro 43: confluence

44: fixed shaft 45: stirring blade

46: guide blade 48a, 48b: filter member

50: extended nozzle 60: injection pipe

61: auxiliary injection pipe 401: step

410: extension 411: key

481: key groove 482: through

510: extension passage 520, 630: heat transfer unit

610: main body 620: hopper

640: screw

Claims (13)

delete delete delete delete delete delete In the multi-color injection molding machine for injection molding a resin melt to produce a molded article, A nozzle body 30 having a plurality of body passages 32 formed therein, and an extension nozzle 50 having one end coupled to the nozzle body and having an extension passage 510 therein communicating with the body passage; A combined nozzle 20 which is coupled to an end of the extension nozzle and comprises a nozzle head 40c for injecting a resin melt supplied from a flow path through an outlet; Tubular body 610 coupled to the nozzle body 30, a hopper 620 mounted to the rear of the main body to supply the raw material into the main body, and the raw material formed and injected into the inner periphery of the main body in a liquid phase It is configured to include; the injection pipe 60 and the auxiliary injection pipe 61 consisting of a heat transfer unit 630 for heating and melting, and a screw 640 for injecting the melt into the injection port in front of the body, A fixed shaft 44 is installed in the hollow portion inside the nozzle head 40c in a direction orthogonal to the direction in which the molten resin is discharged from the extension flow passage, and the stirring blade 45 is provided on the fixed shaft. Multi-color injection machine having a composite nozzle characterized in that the stirring is made by the rotation of the stirring blades installed. In the multi-color injection molding machine for injection molding a resin melt to produce a molded article, A nozzle body 30 having a plurality of body passages 32 formed therein, and an extension nozzle 50 having one end coupled to the nozzle body and having an extension passage 510 therein communicating with the body passage; A combined nozzle 20 which is coupled to an end of the extension nozzle and comprises a nozzle head 40e for injecting a resin melt supplied from a flow path through an outlet; Tubular body 610 coupled to the nozzle body 30, a hopper 620 mounted to the rear of the main body to supply the raw material into the main body, and the raw material formed and injected into the inner periphery of the main body in a liquid phase It is configured to include; the injection pipe 60 and the auxiliary injection pipe 61 consisting of a heat transfer unit 630 for heating and melting, and a screw 640 for injecting the melt into the injection port in front of the body, The nozzle head (40e) has a composite nozzle, characterized in that formed inside the hollow portion, a plurality of guide blades 46 are formed on the inner surface of the spiral so that the resin melt is rotated while being discharged to the discharge port 41 of the front surface Multicolor Injection Molding Machine. delete delete delete delete delete

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