KR102221674B1 - Nozzle for injection machine - Google Patents

Abstract

The present invention relates to a nozzle assembly for an injection machine having a gas discharge means mounted on a cylinder of an injection machine and capable of improving the quality and productivity of the injection product by discharging the gas mixed in the resin during injection by itself. , In order to achieve the above object, the rear body is coupled to the front end of the cylinder of the injection machine, and has a resin inlet passage; A first fastening body coupled to the front surface of the rear body and having an injection port connected to the inflow path; A center body coupled to the front surface of the first fastening body and having a passageway connected to the injection port; A second fastening body coupled to the front surface of the center body and having an outlet connected to the passageway; A front body coupled to a front surface of the second fastening body and having an injection path connected to the outlet; And a gas discharging means for discharging the gas mixed in the resin to the outside of the nozzle assembly, wherein the gas discharging means comprises, in the second fastening body, a second exhaust formed to connect the outlet and the outer circumferential surface of the second fastening body. Furnace, a plurality of discharge rings having a hollow portion inserted into the passageway and into which a vortex guide pin is inserted, a plurality of comb grooves formed on both front and rear surfaces, and an outlet groove formed on an outer circumferential surface, and inserted into the hollow portion to the passage passage Including a vortex guide pin that is mounted on the front and rear ends in a conical shape so that the outer diameter decreases toward the outer longitudinal direction, respectively, and two or more spiral grooves cross the outer circumferential surface in a'X' shape along the longitudinal direction. , When the resin passes through the passageway, the gas mixed in the resin is discharged by the vortex while flowing along the spiral groove, and the released gas is discharged to the second exhaust passage through the comb groove and the outlet groove. .

Description

Nozzle assembly for injection machine with gas discharge means {NOZZLE FOR INJECTION MACHINE}

The present invention relates to a nozzle assembly for an injection machine having a gas discharge means mounted on a cylinder of an injection machine and capable of improving the quality and productivity of the injection product by discharging the gas mixed in the resin during injection by itself. .

A typical injection machine includes a cylinder for injecting resin at high pressure and high speed by heating a synthetic resin raw material (resin) to a high temperature through a heater, and the cylinder is equipped with a nozzle for injecting the resin into the cavity inside the mold.

At this time, most synthetic resin raw materials used for injection molding contain moisture at room temperature. In the case of high-quality molding, the resin is dried in advance at a high temperature to remove moisture.

However, even if drying is carried out before use, it is practically impossible to completely remove moisture from the synthetic resin raw material.Since the synthetic resin raw material is melted at a high temperature in a short time and then injected at high pressure and high speed in the cylinder, the injected resin contains more than a certain amount of moisture. It is bound to be mixed in this gaseous state.

Gas mixed in the resin in this way not only causes molding defects such as bubbles or non-molding in the product during injection molding, but also causes appearance defects and dimensional defects in which gas marks remain on the product surface, so that the gas in the solvent resin is removed. It is advantageous for producing high-quality molded products to make only pure resin be injected.

Furthermore, if the gas inside the nozzle of the injection machine is filled, the remaining resin remains in the cylinder and nozzle as it interferes with the injection flow of the injection machine and may be fixed as it is deteriorated and carbonized, which is a hassle of having to periodically separate and clean the cylinder and the nozzle. This occurs, and this has a problem of lowering the productivity of the injection operation.

However, as can be seen in Registered Patent No. 10-1939580, Published Utility Model No. 20-2018-0000355, Registered Patent No. 10-1210427, and Patent Publication No. 10-2014-0012346, conventional nozzles for injection machines Since the flow path through which the resin is injected has a single structure, separate gas is not discharged from the nozzle assembly itself.

At the actual site, the nozzle is brought into contact with the bushing of the mold so as to generate a very fine gap to discharge the gas generated during injection.This method has a high risk of resin leakage between the nozzle and the mold. There is a problem in that the injection machine itself cannot be used unless a periodic check is made because it rises through the nozzle and cylinder while curing.

Accordingly, the present invention was devised to solve the above problems,

The present invention is mounted on a cylinder of an injection machine to provide a nozzle assembly for an injection machine having a gas discharge means capable of improving the quality and productivity of the injection product by discharging the gas mixed in the resin during injection by itself. It is aimed at.

In order to achieve the above object, the nozzle assembly for an injection machine according to the present invention,

A rear body coupled to the front end of the cylinder of the injection machine and having a resin inlet passage;

A first fastening body coupled to the front surface of the rear body and having an injection port connected to the inflow path;

A center body coupled to the front surface of the first fastening body and having a passageway connected to the injection port;

A second fastening body coupled to the front surface of the center body and having an outlet connected to the passageway;

A front body coupled to a front surface of the second fastening body and having an injection path connected to the outlet; And

Including; gas discharge means for discharging the gas mixed in the resin to the outside of the nozzle assembly,

The gas discharge means,

In the second fastening body, a second exhaust path formed to connect the outlet and the outer circumferential surface of the second fastening body,

A plurality of discharge rings fitted in the passageway and having a hollow portion into which a vortex guide pin is inserted, a plurality of comb grooves formed on both front and rear surfaces, and an outlet groove formed on the outer circumferential surface,

It is inserted into the hollow part and mounted on the passageway, and both ends of the front and rear protrude in a conical shape so that the outer diameter decreases toward the outer longitudinal direction, respectively, and two or more spiral grooves cross the outer circumferential surface in a'X' shape along the longitudinal direction. Including a vortex guide pin provided,

When the resin passes through the passageway, gas mixed in the resin is discharged by a vortex while flowing along the spiral groove, and the released gas is discharged to the second exhaust passage through the comb groove and the outlet groove.

And in the nozzle assembly for an injection machine according to the present invention,

Each of the front surface of the rear body and the rear surface of the front body includes a first concave portion and a second concave portion formed concave in a conical shape such that an inner diameter gradually decreases toward an outer longitudinal direction,

A first head portion and a first head portion protruding in a conical shape so that the outer diameter gradually decreases toward the outer longitudinal direction corresponding to the first and second recesses, respectively, on the rear surface of the first fastening body and the front of the second fastening body. 2 including the head,

The inner diameter of each concave portion is formed larger than the outer diameter of each head portion,

As the inflow path and the injection path are respectively connected to the vertices of each concave part, at least one injection port and one discharge port are provided around each head part,

A decompression path formed by spaced apart a predetermined distance from the first concave portion and the first head portion is connected between the inlet passage and the injection port,

It characterized in that the pressure increase path formed by a predetermined distance apart from the second head part and the second concave part is connected between the discharge port and the injection path.

In addition, in the nozzle assembly for an injection machine according to the present invention,

The gas discharge means,

In the first fastening body, further comprising a first exhaust path formed to connect the inlet and the outer circumferential surface of the first fastening body,

It is characterized in that the gas discharged by the reduced pressure while the resin passes through the inlet is discharged to the first exhaust passage.

Furthermore, in the nozzle assembly for an injection machine according to the present invention,

The gas discharge means,

Further comprising a fractionation discharger connected to the second exhaust path to separate and discharge liquid impurities and gas,

The fractionation ejector,

A suction part for generating a suction pressure in the first exhaust path,

A first discharge path connected to the first exhaust path,

A second discharge path connected through and connected in a direction perpendicular to the first discharge path,

Including a second filter fitted to the second discharge passage and mounted on the first discharge passage,

Liquid impurities are filtered through the second filter and discharged to the second discharge path, and the gas passes through the second filter and is discharged to the first discharge path.

The nozzle assembly for an injection machine according to the present invention,

The nozzle assembly itself is equipped with a gas discharge function, so that the resin flowing through the nozzle assembly forms a vortex and releases the gas so that the released gas is discharged to the outside of the nozzle, thereby reducing the defect rate due to the gas mixed with the resin and improving productivity accordingly. It works,

When the resin passes through the nozzle assembly, it is injected through increased pressure after decompression, so that high temperature and high pressure resin is smoothly injected.

The resin discharges gas on the nozzle assembly twice, so the gas removal efficiency is very good,

The effect of completely removing the gas in the resin as clogging due to curing of the liquid impurities does not occur by inducing gas discharge by forced suction method, and separately discharging the liquid impurities discharged along with the gas from the gas. There is.

1 is an exploded cross-sectional view schematically showing a nozzle assembly for an injection machine according to the present invention.
Figure 2 is a sample photograph of the first and second fastening bodies according to the present invention.

The present invention will be described in detail in the text of the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, and it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

In each drawing, the same reference numerals, in particular the number of tens and ones, or the same reference numerals with the same tens, ones, and alphabet indicate members having the same or similar functions, and unless otherwise specified, each of the drawings. The member indicated by the reference numeral can be identified as a member conforming to these criteria.

In addition, components in each drawing are expressed by exaggeratingly large (or thick) or small (or thin) or simplified their size or thickness in consideration of the convenience of understanding, but the scope of protection of the present invention is limited by this. It shouldn't be.

The terms used in the present specification are only used to describe specific embodiments (sun, 態樣, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present application, terms such as ~comprise~ or ~consist~ are intended to designate the existence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

The ~1~, ~2~ and the like described in the present specification are only referred to to distinguish different constituent elements, and are not limited to the order of manufacture, and their names in the detailed description and claims of the invention It may not match.

In describing the nozzle assembly for an injection machine having a gas discharging means according to the present invention, for convenience, if an approximate rough direction standard is specified with reference to FIG. 1, the direction in which gravity acts as the lower side is shown as the vertical direction. The left and right are determined, and directions are specified and described in accordance with this standard in the detailed description of the invention and in the claims related to other drawings, unless otherwise specified.

Hereinafter, a nozzle assembly for an injection machine having a gas discharge means according to the present invention will be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the present invention relates to a nozzle assembly for an injection machine that is mounted on a front end of a cylinder (not shown) of the injection machine to inject resin into a mold, and is largely a rear body 10R, a first fastening body (20R), a center body 30, a second fastening body (20F), a front body (10F) and a gas discharge means.

The rear body 10R is coupled to the front end of the cylinder of the injection machine and has a resin inflow path 12A.

Specifically, the rear body 10R has a cylindrical first fastening portion 11A coupled to a cylinder protruding from the rear of the disk-shaped body, and passing through the first fastening portion 11A to the inflow passage 12A. Is provided, and a first concave portion 13A whose inner diameter is extended toward the front end is connected to the front end portion of the inflow passage 12A.

In addition, the rear body 10R includes a first filter 14 fitted into the first fastening part 11A, and the first filter 14 has a plurality of through holes 14a formed therethrough in the longitudinal direction. When the resin melted on the cylinder flows into the nozzle assembly, it filters out solid impurities in the resin.

The first filter 14 is provided so that inlet grooves 14b through which resin flows are radially spaced apart from each other at predetermined intervals on the outer circumferential surface, and a plurality of inlet holes 14c penetrate inside and outside the inlet grooves 14b facing each other. Is provided, at this time the inlet hole (14c) is in communication with the through hole (14a) at the tip,

The inlet groove (14b)-the inlet hole (14c)-the through hole (14a) forms a flow path.

Through this, the resin flowing through the inflow groove (14b) passes through the inlet hole (14c) to filter impurities first, and the resin in the first filter (14) passes through the through hole (14a) and impurities are secondary It is filtered, and the effect of removing impurities can be enhanced through a two-pack filter.

The first concave portion 13A is provided on the front surface of the rear body 10R and is connected to the inflow passage 12A, and is formed in a conical shape so that the inner diameter decreases toward the outer (rear end side, left in the drawing) longitudinal direction. do. That is, the inner diameter of the first concave portion 13A connected to the inflow passage 12A gradually expands toward the front end side.

In addition, a first fitting groove 13a is concave toward the rear around the front end (right side in the drawing) opening of the first concave portion 13A, so that the rear body 10R and the first fastening body 20R are combined. During injection, the first protruding end 27 of the second fastening body 20F is interlocked while being fitted into the first fitting groove 13a, thereby preventing the resin from leaking to the outside of the nozzle assembly during injection.

Subsequently, the first fastening body 20R is coupled to the front surface of the rear body 10R and has an injection port 21A connected to the inflow path 12A.

Specifically, the first fastening body 20R is a first head portion 23A protruding in a conical shape so that the outer diameter gradually decreases in the longitudinal direction of the rear end corresponding to the first concave portion 13A on the rear surface of the disk-shaped body. Includes. That is, the outer diameter of the first head portion 23A connected to the injection port 12A gradually expands toward the front end side.

At this time, the inner diameter of the first concave portion (13A) is formed larger than the outer diameter of the first head portion (23A),

As the inflow passage 12A is connected to the vertex of the first concave portion 13A, at least one injection port 21A is provided around the first head portion 23A,

A decompression path 24A is connected between the inflow path 12A and the injection port 21A, wherein the first concave part 13A and the first head part 23A are spaced apart from each other by a predetermined distance.

In this case, it is more preferable that two or more injection ports 21A are radially arranged in the circumferential direction of the first head 23A for smooth injection of the resin.

Further, the first fastening body 20R further includes a first exhaust path 22A formed to connect the inlet 21A and the outer circumferential surface of the first fastening body 20R as a gas discharge means.

The first exhaust passage 22A has an inlet-side first passage 22a formed by opening the front surface of the first fastening body 20R, and an outlet communicated by bending toward the outer circumferential surface from the inside of the first passage 22a. It is composed of a side second passage 22b.

At this time, a guide groove 25 connecting two or more injection ports 21A is formed in the circumference of the first head 23A, so that the resin on the pressure reducing furnace 24A is uniformly distributed to each injection port 21A. So that it is injected,

A first protruding end 27 fitted into the first fitting groove 13a protrudes around the guide groove 25.

In addition, the bottom surface of the guide groove 25 is composed of a slope portion 25 formed to be inclined downward toward both injection ports 21A at the highest point 25a formed between each injection port 21A, thereby improving the flow of the resin.

In addition, the first fastening body (20R) has a connection groove (26) formed concave along the circumference of the side wall portion (21a) forming each injection hole (21A), each connection groove (26), and the connection groove ( One of 26) and the first passage 22a of the first exhaust passage 22A are partially connected to each other in an overlapping manner.

In addition, the first fastening body 20R includes a second protruding end 28 from which a portion of the rear surface where the injection port 21A is formed, and the second protruding end 28 is provided on the rear surface of the center body 30 While being fitted into the second fitting groove 32, it is interlocked to prevent the resin from leaking to the outside of the nozzle assembly during injection.

Next, the center body 30 is coupled to the front surface of the first fastening body 20R and has a passageway 31 connected to the injection port 21A.

The passageway 31 is connected to the inlet 21A and the outlet 21B to be described later in the same line, and it is preferable that a plurality of passageways 31 are arranged radially.

In addition, the center body 30 includes a second fitting groove 32 in which portions of the inlet and outlet portions of the passageway 31 are formed on both front and rear sides, respectively, so that the first and second fastening bodies 20R The second protruding end 28 of (20F) is fitted in the second fitting groove 32 while being interlocked to prevent the resin from leaking to the outside of the nozzle assembly during injection.

Subsequently, the second fastening body 20F is coupled to the front surface of the center body 30 and has an outlet 21B connected to the passageway 31.

Specifically, the second fastening body 20F protrudes in a conical shape so that the outer diameter decreases in the longitudinal direction of the front end side in correspondence with the second concave portion 13B of the front body 10F to be described later on the front of the disk-shaped body. It includes a second head portion 23B. That is, the outer diameter of the second concave portion 13B gradually expands toward the front end side.

At this time, the inner diameter of the second concave portion 13B provided in the front body 20F to be described later is formed larger than the outer diameter of the first head portion 23A,

As the ejection path 12B of the front body 10F is connected to the vertex of the second concave portion 13B, at least one outlet 21B is provided around the second head portion 23B,

Between the discharge port 21B and the injection path 12B, a pressure boosting path 24B formed by the second head part 23B and the second concave part 13B separated by a predetermined distance is connected.

At this time, it is preferable that at least two of the outlets 21B are radially arranged in the circumferential direction of the second head 23B for smooth injection of the resin.

In addition, the second fastening body 20F further includes a second exhaust path 22B formed to connect the outlet 21B and the outer circumferential surface of the second fastening body 20F as a gas discharging means.

The second exhaust passage 22B has an inlet-side first passage 22a formed by opening the rear surface of the second fastening body 20F, and an outlet communicated by bending toward the outer circumferential surface from the inside of the first passage 22a. It is composed of a side second passage 22b.

This second fastening body 20F is the same member as the first fastening body 20R, but differs only in that they are symmetrically coupled in opposite directions, and the inlet 21A and the outlet ( 21B), the decompression furnace 24A and the pressure booster 24B differ only in functional names, and have the same configuration and structure as the first fastening body 20R, and thus the guide groove 25 and the connection groove ( 26), and the description of the first and second protruding ends 27 and 28 will be omitted.

Subsequently, the front body 10F is coupled to the front surface of the second fastening body 20F and has an ejection path 12B connected to the outlet 21B of the second fastening body 20F.

Specifically, the front body 10F has a cylinder-shaped second fastening portion 11B to which the nozzle body 15 is coupled to the front of the disk-shaped body, and penetrates the second fastening portion 11B to allow the injection. A furnace 12B is provided, and a second concave portion 13B whose inner diameter decreases toward the front ejection furnace 12B is connected to the rear end of the ejection furnace 12B.

The second concave portion 13B is provided on the rear surface of the front body 10F and is connected to the injection furnace 12B, and is concave in a conical shape so that the inner diameter gradually decreases toward the outer longitudinal direction. That is, the second concave portion 13B is connected to the injection furnace 12B while the inner diameter gradually decreases toward the front end.

The front body 10F is the same member as the rear body 10R, but is symmetrically coupled to each other in opposite directions, and the first filter 14 and the nozzle body 15 are respectively connected to the fastening portions 11A and 11B. There is a difference only in that they are combined, and the inflow path 12A and the ejection path 12B, which are configurations corresponding thereto, differ only in functional names, and thus have the same configuration and structure as the rear body 10R. A description of the 1 fitting groove 13a will be omitted.

Next, the gas discharge means discharges the gas mixed with the resin to the outside of the nozzle assembly.

Specifically, the gas discharge means,

The second exhaust path 22B,

It is fitted in the passageway 31, and has a hollow portion 33A into which the vortex guide pin 34 is inserted, a plurality of comb grooves 33a formed on both front and rear surfaces, and an outlet groove 33b formed on the outer circumferential surface. A plurality of discharge rings 33,

It is fitted in the hollow portion (33A) and mounted on the passageway (31), and the front and rear ends are protruded in a conical shape so that the outer diameter decreases toward the outer longitudinal direction, respectively, and two or more spiral grooves (34a) on the outer circumferential surface along the longitudinal direction Including the vortex guide pin 34 provided to be crossed in this'X' shape,

When the resin passes through the passageway 31, the gas mixed in the resin is released by the vortex while flowing along the spiral groove 34a, so that the released gas is discharged through the comb groove 33a and the outlet groove 33b. It is discharged to the second exhaust path 22B.

The discharge ring 33 is a flow path formed of a helical groove 34a between the vortex guide pin 34 and the inner circumferential surface of the hollow part 33A in an interview form with the outer circumferential surface of the vortex guide pin 34 To form.

In addition, the comb groove (33a) is formed in the form of fine scratches on both front and rear surfaces of the discharge ring (33), the injection port (21A) in contact with the discharge ring (33) on both sides of the discharge ring (33) interviewed with each other and the outermost discharge ring (33) It is a kind of gas vent that forms a fine gap between the and the side wall portion 21a of the outlet 21B.

The outlet groove (33b) is composed of an annular groove formed concave in the circumferential direction along the outer circumferential surface of the discharge ring (33), and a plurality of flat grooves formed concave in a direction orthogonal to the annular groove.

Accordingly, the discharge rings 33 in close contact with each other communicate with the passageway 31 through the comb grooves 33a and the outlet grooves 33b to form a flow path through which gas can be discharged.

The vortex induction pin 34 is mounted on the passageway 31 by the discharge rings 33, and consists of helical grooves 34a between the discharge rings 33 and the vortex induction pin 34. By forming a flow path, the resin can flow along the spiral groove (34a).

In addition, the gas discharge means,

Further including the first exhaust path (22A),

As the resin passes through the injection port 21A, the gas released by the reduced pressure is discharged to the first exhaust passage 22A.

Furthermore, the gas discharge means,

Further comprising a fractionation discharger 40 connected to the second exhaust path 22B to separate and discharge liquid impurities and gas,

The fractionation discharger 40,

A suction part 41 for generating a suction pressure in the first exhaust path 22A,

A first discharge path 42 connected to the first exhaust path 22A,

A second discharge path 43 connected through and connected to the first discharge path 42 in a direction orthogonal to the first discharge path 42,

Including a second filter 44 fitted on the first discharge passage 42 by being fitted in the second discharge passage 43,

Liquid impurities are filtered through the second filter 44 and discharged to the second discharge path 43, and the gas passes through the second filter 44 and is discharged to the first discharge path 42.

The first discharge passage 42 has one end connected to the outlet side second passage 22b of the first exhaust passage 22A through a pipe 45, and the other end of the first exhaust passage 22A and the suction part 41 Connected,

A vacuum suction pressure is generated in the second exhaust path 22B-the pipe 45-the second discharge path 43 by the suction part 41.

The upper end of the second discharge path 43 is closed by the second filter 44, and a drain 46 is connected to the lower end thereof.

The second filter 44 has an exhaust passage 44a interlocked in a direction orthogonal to the longitudinal direction by forming fine pores on the outer circumferential surface (ie, the longitudinal direction of the first exhaust passage 42), and the lower end A plurality of drain holes 44b in communication with the exhaust passage 44a are provided.

This fractionation discharger 40 may be installed on the heater of the cylinder to prevent curing of liquid impurities,

More preferably, it is advantageous for maintaining an appropriate high temperature state to be additionally equipped with a separate heater for exclusive use of the separate jet discharger 40.

Hereinafter, the operation and effect of the present invention having the above-described configuration will be described.

First, when the molten resin on the cylinder is injected by pressurization, solid impurities are primarily filtered out while the resin passes through the first filter 14 and the resin flows into the inflow passage 12A.

The resin that has passed through the inflow path 12A enters the decompression path 24A and diffuses widely by the surface of the first head 23A and flows into the inlet 21A in a depressurized state.

In the state where the gas mixed in the resin that has passed the injection port 21A is discharged by decompression, when the resin that has passed the injection port 21A through the guide groove 25 passes through the passageway 31, a part of the gas is discharged. Through the comb groove (33a) of the ring (33), through the connection groove (26), through the first passage (22a) on the inlet side of the first exhaust passage (22A), the second outlet side of the first exhaust passage (22A) It is primarily discharged through the passage 22b.

In addition, the resin entering the passageway 31 flows along the spiral groove 34a of the vortex guide pin 34 to form a vortex to release the gas mixed in the resin, and the discharged gas is discharged in the discharge ring 33 ) Flows to the second exhaust path 22B through the connection groove 26 along the inner circumferential surface of the passageway 31 through the comb grooves 33a and the outlet grooves 33b.

At this time, since negative pressure is applied on the second exhaust path 22B by the suction part 41 of the jet discharger 40, the gas generated while passing through the passageway 31 does not pass through the discharge port 21B and is guided. While being sucked into the groove 25, it passes through the first passage 22a on the inlet side of the second exhaust passage 22B and is discharged secondary to the second passage 22b on the outlet side of the second exhaust passage 22B.

At the same time, the resin from which the gas has been removed passes through the discharge port 21B and enters the pressure intensifying path 24B, while gathering on the surface of the second head 23B, and is injected into the mold through the injection path 12B in an increased pressure. .

Meanwhile, the gas discharged to the second exhaust path 22B flows through the first exhaust path 42 along the pipe 45 by the suction part 41.

At this time, the discharged gas may contain liquid impurities. As the gas passes through the second filter 44, the liquid impurities contained in the gas do not pass through the exhaust passage 44a in which fine pores are formed, and are filtered out, so that only the liquid impurities are drained. It flows along 44b and is discharged to the drain 46 through the second discharge path 43, and the pure gaseous gas passes through the exhaust flow path 44a and is completely discharged to the outside of the nozzle.

In the above description of the present invention, a nozzle assembly for an injection machine having a gas discharge means has been mainly described with reference to the accompanying drawings, but the present invention is capable of various modifications, changes and substitutions by those skilled in the art, and such modifications, changes and substitutions Should be construed as belonging to the scope of protection of the present invention.

10R: rear body 10F: front body
11A, 11B: Fastening part 12A: Inflow path
12B: ejection furnace 13A, 13B: recessed part
14: first filter 15: nozzle body
20R: 1st fastening body 20F: 2nd fastening body
21A: inlet 21B: outlet
23A, 23B: head part 24A: decompression furnace
24B: booster furnace 25: guide groove
26: connection groove 27, 28: protruding end
30: center body 31: passage
32: second fitting groove 33: discharge ring
34: vortex guide pin 40: jet ejector
41: suction unit 42, 43: discharge path
44: second filter 45: piping
46: drain

Claims (4)

A rear body 10R coupled to the front end of the cylinder of the injection machine and having a resin inflow passage 12A;
A first fastening body (20R) coupled to the front surface of the rear body (10R) and having an injection port (21A) connected to the inflow path (12A);
A center body 30 coupled to the front surface of the first fastening body 20R and having a passageway 31 connected to the injection port 21A;
A second fastening body (20F) coupled to the front surface of the center body (30) and having an outlet (21B) connected to the passageway (31);
A front body (10F) coupled to the front surface of the second fastening body (20F) and having an injection path (12B) connected to the outlet port (21B); And
Including; gas discharge means for discharging the gas mixed in the resin to the outside of the nozzle,
The gas discharge means,
In the second fastening body 20F, formed to connect the outlet 21B and the outer circumferential surface of the second fastening body 20F, the inlet-side first passage formed by opening the rear surface of the second fastening body 20F ( 22a), and a second exhaust passage 22B composed of an outlet-side second passage 22b that is bent and communicated from the inside of the first passage 22a toward the outer circumferential surface,
It is fitted in the passageway 31, and has a hollow portion 33A into which the vortex guide pin 34 is inserted, a plurality of comb grooves 33a formed on both front and rear surfaces, and an outlet groove 33b formed on the outer circumferential surface. A plurality of discharge rings 33,
It is fitted in the hollow portion (33A) and mounted on the passageway (31), and the front and rear ends are protruded in a conical shape so that the outer diameter decreases toward the outer longitudinal direction, respectively, and two or more spiral grooves (34a) on the outer peripheral surface along the longitudinal direction Including a vortex induction pin 34 provided to be crossed in this'X' shape,
The discharge ring 33 is a flow path formed of a helical groove 34a between the vortex guide pin 34 and the inner circumferential surface of the hollow part 33A in an interview form with the outer circumferential surface of the vortex guide pin 34 To form,
The comb groove (33a) is formed in the form of a scratch on the front and rear surfaces of the discharge ring (33), and the injection port (21A) and the discharge port in contact with the discharge ring (33) on both sides of the discharge ring (33) interviewed with each other A fine gap is formed between the side wall portions 21a of (21B),
The outlet groove (33b) is composed of an annular groove formed concave in the circumferential direction along the outer circumferential surface of the discharge ring (33), and a plurality of flat grooves formed concave in a direction orthogonal to the annular groove,
The discharge rings 33 in close contact with each other are communicated with the passageway 31 through the comb groove 33a and the outlet groove 33b to form a flow path through which gas can be discharged,
When the resin passes through the passageway 31, the gas mixed in the resin is released by the vortex while flowing along the spiral groove 34a, so that the released gas is discharged through the comb groove 33a and the outlet groove 33b. Discharged to the second exhaust path 22B,
The rear body 10R includes a first filter 14 having a cylindrical shape coupled to a cylinder protruding from the rear of the disk-shaped body, and being fitted into the first fastening portion 11A. Includes,
The first filter 14 has a plurality of through holes 14a formed through the lengthwise direction to filter solid impurities in the resin when the resin melted on the cylinder flows into the nozzle assembly,
The first filter 14 is provided so that inlet grooves 14b through which resin flows are radially spaced apart from each other, and a plurality of inlet holes 14c penetrate inside and outside the inlet grooves 14b facing each other. It is provided, the inlet hole (14c) is in communication with the through hole (14a) of the tip, characterized in that the inlet groove (14b)-the inlet hole (14c)-the through hole (14a) forms one flow path Nozzle for injection machine.
The method of claim 1,
Each of the front surface of the rear body 10R and the rear surface of the front body 10F includes a first concave portion 13A and a second concave portion 13B formed in a conical shape such that the inner diameter gradually decreases toward the outer longitudinal direction. and,
Each of the rear surface of the first fastening body 20R and the front surface of the second fastening body 20F has an outer diameter corresponding to the first concave portion 13A and the second concave portion 13B in an outer longitudinal direction. Including a first head portion (23A) and a second head portion (23B) formed to protrude in a conical shape so as to be tapered,
The inner diameter of each concave portion 13A, 13B is formed larger than the outer diameter of each head portion 23A, 23B,
While the inflow passage 12A and the ejection passage 12B are connected to the vertices of each of the concave portions 13A and 13B, respectively, the injection port 21A and the outlet port ( While at least one 21B) is provided, a guide groove 25 connecting two or more injection ports 21A and 21B is concave inwardly,
A decompression path 24A formed with the first concave portion 13A and the first head portion 23A spaced apart a predetermined interval is connected between the inlet passage 12A and the injection port 21A,
For an injection machine, characterized in that between the discharge port (21B) and the injection path (12B), the second head part (23B) and the second concave part (13B) are connected to a pressure increase path (24B) formed at a predetermined distance apart from each other. Nozzle.
The method of claim 2,
The gas discharge means,
In the first fastening body 20R, formed to connect the injection hole 21A and the outer circumferential surface of the first fastening body 20R, the inlet-side first passage formed by opening the front surface of the first fastening body 20R ( 22a), and a first exhaust passage 22A composed of a second outlet passage 22b communicated by bending from the inner side of the first passage 22a toward the outer circumferential surface,
A nozzle for an injection machine, characterized in that the gas released by the pressure reduction while the resin passes through the injection port (21A) is discharged to the first exhaust passage (22A).
The method of claim 3,
The gas discharge means,
Further comprising a fractionation discharger 40 connected to the second exhaust path 22B to separate and discharge liquid impurities and gas,
The fractionation discharger 40,
A suction part 41 for generating a suction pressure in the first exhaust path 22A,
A first discharge path 42 connected to the first exhaust path 22A,
A second discharge path 43 connected through and connected to the first discharge path 42 in a direction orthogonal to the first discharge path 42,
Including a second filter 44 fitted on the first discharge passage 42 by being fitted in the second discharge passage 43,
Liquid impurities are filtered through the second filter 44 and discharged to the second discharge path 43, and the gas passes through the second filter 44 and is discharged to the first discharge path 42. Nozzle for injection molding machine.

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