KR20140023740A - Catapult nozzle with exterior spring - Google Patents

Catapult nozzle with exterior spring Download PDF

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Publication number
KR20140023740A
KR20140023740A KR1020120090109A KR20120090109A KR20140023740A KR 20140023740 A KR20140023740 A KR 20140023740A KR 1020120090109 A KR1020120090109 A KR 1020120090109A KR 20120090109 A KR20120090109 A KR 20120090109A KR 20140023740 A KR20140023740 A KR 20140023740A
Authority
KR
South Korea
Prior art keywords
nozzle
elastic
elastic force
key
needle
Prior art date
Application number
KR1020120090109A
Other languages
Korean (ko)
Inventor
박상현
박주남
Original Assignee
엘에스엠트론 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘에스엠트론 주식회사 filed Critical 엘에스엠트론 주식회사
Priority to KR1020120090109A priority Critical patent/KR20140023740A/en
Publication of KR20140023740A publication Critical patent/KR20140023740A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/20—Injection nozzles
    • B29C45/23—Feed stopping equipment
    • B29C45/231—Needle valve systems therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C2045/1784—Component parts, details or accessories not otherwise provided for; Auxiliary operations not otherwise provided for
    • B29C2045/1798—Using spring tension to drive movable machine parts

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to an injection molding machine nozzle for injecting molten synthetic resin into a mold, and in particular, it is configured to easily adjust the elastic force supporting the nozzle in response to the change in the injection pressure.
The injection nozzle according to the present invention for achieving the above object is a body formed with a supply passage therein to allow the molten synthetic resin supplied from one side to flow to the other side, an elastic body mounted around the outer periphery of the body, the length of the body The elastic force control unit which is movable in the direction and pressurizes the elastic body, the key for transmitting the elastic force of the elastic body to the needle located inside the body, and the molten synthetic defense which is mounted at the other end of the body and flows to the other side through the supply path of the body The supply hole is formed to be discharged to the outside is characterized in that it comprises a nozzle cap for opening and closing the supply hole by the movement of the needle.

Description

Injection nozzle with external spring {Catapult Nozzle with Exterior Spring}

The present invention relates to an injection molding machine nozzle for injecting molten synthetic resin into a mold, and in particular, it is configured to easily adjust the elastic force supporting the nozzle in response to the change in the injection pressure.

In the drawings, Figure 1 is a cross-sectional view of the nozzle for the injection machine described in the prior art document Republic of Korea Patent Publication No. 10-0819757.

As shown in FIG. 1, the injection nozzle No. 1 includes a nozzle cap 10 and a nozzle assembly 20 in which the needle 29 is movable to open and close the supply hole 11 formed in the nozzle cap 10. And the nozzle assembly 20 is divided into a nozzle head 30 mounted at the tip.

Specifically, the nozzle head 30 has an expanded resin flow path 31 formed therein, and the nozzle assembly 20 is screwed into a female screw formed at the tip of the resin flow path 31.

The nozzle assembly 20 has a male screw formed at the rear of the body 21 to be screwed into the female screw formed in the nozzle head 30, and a coil spring 27 is positioned inside the groove 23 formed in the body 21. The needle 29 is located at the entrance of the groove 23.

A male screw is formed at the tip of the body 21 so that the nozzle cap 10 is screwed, and a female screw formed on the inner circumferential surface of the nozzle cap 10 is screwed to the male screw formed at the tip of the body 21. Thus, when the nozzle cap 10 is screwed to the tip of the body 21 of the nozzle assembly 20, the needle 29 closes the supply hole 11 formed in the nozzle cap 10, the nozzle head 30 The resin introduced through the resin flow passage 31 is introduced through the supply passage 25 formed in the longitudinal direction of the body 21 and then filled in the nozzle cap 10. When the pressure for extruding the resin is greater than the elastic force of the coil spring 27, the needle 29 opens the supply hole 11 of the nozzle cap 10 while reversing into the groove 23 of the body 21. Will be discharged.

On the other hand, if the pressure for extruding the resin is less than the elastic force of the coil spring 27, the needle 29 moves forward to close the supply hole 11.

In the conventional injection molding machine nozzle configured as described above, a coil spring having an elastic force set according to the pressure of the resin to be extruded is mounted. When the injection pressure is changed, the elastic force of the coil spring and the injection pressure do not coincide with each other. Opening and closing does not occur smoothly, and thus a problem arises in that the supply hole is not opened at the time of opening or closed at the time of closing.

Therefore, whenever the injection pressure is changed, the operator should replace the coil spring of the nozzle with a coil spring of different elastic force. As described above, the coil spring is located inside the body. There is difficulty in work.

Republic of Korea Patent Publication No. 10-0819757 (Notification Date; 2008.04.07)

The present invention is invented to solve the problems of the prior art as described above, by mounting an elastic body that provides an elastic force to the nozzle in the direction of closing the supply hole of the nozzle cap on the outside, the elastic force of the elastic body in accordance with the injection pressure change An object of the present invention is to provide an injection nozzle having an external spring configured to be easily adjusted.

The injection nozzle according to the present invention for achieving the above object is a body formed with a supply passage therein to allow the molten synthetic resin supplied from one side to flow to the other side, an elastic body mounted around the outer periphery of the body, the length of the body The elastic force control unit which is movable in the direction and pressurizes the elastic body, the key for transmitting the elastic force of the elastic body to the needle located inside the body, and the molten synthetic defense which is mounted at the other end of the body and flows to the other side through the supply path of the body The supply hole is formed to be discharged to the outside is characterized in that it comprises a nozzle cap for opening and closing the supply hole by the movement of the needle.

In addition, according to a preferred embodiment of the present invention, the body is formed with a long hole in the longitudinal direction of the body and the key is inserted into the long hole is movable in the longitudinal direction of the body, the needle located inside the body is an elastic force transmitted through the key Moves in the direction of closing the supply hole.

In addition, according to a preferred embodiment of the present invention, the key penetrating the long hole is in contact with the elastic body mounted on the outer circumference of the body to transmit the elastic force of the elastic body to the needle.

In addition, according to a preferred embodiment of the present invention, the elastic force adjusting portion is a nut screwed to the male screw formed on the outer peripheral surface of the body, by rotation the nut moves in the longitudinal direction of the body to press the elastic body.

In addition, according to a preferred embodiment of the present invention, the elastic body is a plate spring, the plurality of plate springs are compressed between the elastic force adjusting portion and the key in contact with each other.

In addition, according to a preferred embodiment of the present invention, the elastic body is a coil spring, the coil spring is compressed between the elastic force adjusting portion and the key.

As described above, in the injection molding machine nozzle according to the present invention, since the elastic body is positioned around the nozzle assembly, the key moving together with the needle can easily adjust the magnitude of the elastic force provided by the elastic body in pressing the elastic body. Therefore, even if the injection pressure is changed, by adjusting the elastic force in accordance with the changed injection pressure to smooth the movement of the needle, there is an advantage that the supply hole of the nozzle cap can be opened or closed in a timely manner.

1 is a cross-sectional view of the nozzle for the injection machine described in the prior art document Republic of Korea Patent Publication No. 10-0819757.
Figure 2 is a perspective view of the injection nozzle according to an embodiment of the present invention,
3 is a cross-sectional view of the injection nozzle shown in FIG.
Figure 4 is a cross-sectional view showing an open state of the injection nozzle shown in Figure 3,
5 is a cross-sectional view showing a state in which the elastic force of the elastic body is increased by rotating the nut of the injection molding machine nozzle shown in FIG. 2.

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the injection nozzle having an external spring according to the present invention will be described in detail.

2 is a perspective view showing the injection nozzle according to an embodiment of the present invention, Figure 3 is a cross-sectional view of the injection nozzle shown in Figure 2, Figure 4 is an open state of the injection nozzle shown in Figure 3 5 is a cross-sectional view showing a state in which the elastic force of the elastic body is increased by rotating the nut of the injection molding machine nozzle shown in FIG.

As shown in FIGS. 2 and 3, the injection nozzle 100 includes a nozzle assembly 120 having a rear end fastened to the injection machine, a nozzle cap 110 mounted at the front end of the body 121 of the nozzle assembly 120, and a nozzle cap 110. , And a needle 129 mounted to the front end of the body 121 and opening and closing the supply hole 111 formed in the nozzle cap 110, and the elastic body 140 mounted on the outer circumference of the body 121 is a body ( The elastic force of the elastic body 140 is transmitted to the needle 129 inside the body 121 through the key 127 in contact with both ends of the key 127 positioned through the 121.

Hereinafter, the injection nozzle configured as described above will be described in detail.

The injection nozzle 100 is divided into a nozzle cap 110 and a nozzle assembly 120, as shown in Figure 3, the nozzle assembly 120 is mounted to the injection machine.

The male screw 124B is formed at the rear end of the body 121 of the nozzle assembly 120 and is fastened to the injection machine by screwing. Screwing the nozzle assembly 120 to the injection molding machine is one example of various fastening methods, and may be changed to a fastening method using a coupling or the like.

Hereinafter, the nozzle assembly 120 will be described in detail.

The nozzle assembly 120 has a male screw 124B formed around the rear end of the nozzle assembly 120 to be fastened to the injection molding machine, and the body 121 and the body 121 having four supply paths 125 formed thereon to allow the molten synthetic resin to flow from the rear end to the front end thereof. Nut 143 is fastened to the male screw 124M formed around the middle of the length of the length, and is located in the front of the fastened nut 143 and inserted into the long hole 123 formed in the longitudinal direction of the body 121, the long hole 123 A key 127 moving forward and backward by the length of the body, an elastic body 140 positioned between the key 127 and the nut 143 to provide an elastic force to move the key 127 forward, and a body And a needle 129 inserted into the hollow 126 formed at the tip of the 121 and positioned in contact with the key 127.

In addition, a male screw 124F is formed around the tip of the body 121 so that the nozzle cap 110 is screwed into the male screw 124F. The nozzle cap 110 has a supply hole 111 formed at the center thereof, and the needle 129 inserted into the body 121 corresponds to the supply hole 111, and the needle 129 is formed by the elastic force of the elastic body 140. Moves forward to close the supply hole 111.

Meanwhile, as shown in FIG. 3, the elastic body 140 is plate springs 141, and the edges of the pair of plate springs 141 facing each other are disposed to be in contact with each other, and the pair of plate springs 141 are formed in the body. It is arranged along the circumference of 121. Here, the paired disc spring 141 is configured to be a pair or a plurality of pairs. The plate springs 141 disposed as described above are positioned between the key 127 and the nut 143 and provide elastic force to move the key 127 forward. As illustrated in FIG. 5, the nut 143 is provided. When the nut 143 is moved to the front of the body 121 by rotating, the elastic force applied to the key 127 is increased. On the contrary, the nut 143 is rotated to move the nut 143 to the rear of the body 121. In this case, the elastic force applied to the key 127 becomes small. Therefore, when the injection pressure applied to the injection nozzle 100, that is, the pressure applied to the molten synthetic resin is large, when the nut 143 is rotated to move toward the elastic body 140, that is, the front of the body 121, the elastic force of the elastic body 140 is increased. This can be adjusted to increase the injection pressure, on the contrary, when the injection pressure is low, the nut 143 is moved to the rear of the body 121 to reduce the elastic force of the elastic body 140 to adjust to the injection pressure.

In this way, the nut 143 is an elastic force adjusting unit for adjusting the elastic force of the elastic body 140, and can adjust the elastic force of the elastic body 140 according to the injection pressure.

On the other hand, the elastic body 140 according to the above-described embodiment has been described as a plate spring 141, but may replace the coil spring as an elastic force control unit in place of the plate spring 141.

100: injection nozzle
110: nozzle cap
111: supply hole
120: nozzle assembly
121: Body
125: supply path
127 key
129: Needle
140: elastic body
141: Dish Spring

Claims (6)

A body having a supply path formed therein so that the molten synthetic resin supplied from one side may flow to the other side;
An elastic body mounted around the outer circumference of the body,
An elastic force control unit which is movable in the longitudinal direction of the body and pressurizes the elastic body;
A key for transmitting the elastic force of the elastic body to the needle located inside the body,
It is mounted to the other end of the body and the injection hole is formed so that the supply hole is formed so that the molten synthetic fluid flowing to the other side through the supply path of the body to the outside and the opening and closing of the supply hole by the movement of the needle .
The method of claim 1,
The body is formed with a long hole in the longitudinal direction of the body and the key is inserted into the long hole is movable in the longitudinal direction of the body, the needle located inside the body is moved in the direction of closing the supply hole by the elastic force transmitted through the key Injection machine nozzle, characterized in that.
3. The method of claim 2,
The key penetrating the long hole is injector nozzle, characterized in that both ends of the contact with the elastic body mounted around the outer periphery of the body to transmit the elastic force of the elastic body to the needle.
4. The method according to any one of claims 1 to 3,
The elastic force control unit is a nut screwed to the male screw formed on the outer circumferential surface of the body, by rotating the nut in the longitudinal direction of the body injection machine nozzles characterized in that to press the elastic body.
5. The method of claim 4,
The elastic body is a disc spring, the ejector nozzle, characterized in that the compression between the elastic force adjusting portion and the key in a state in which a plurality of disc springs in contact with each other.
5. The method of claim 4,
The elastic body is a coil spring, the coil spring is injector nozzle, characterized in that compressed between the elastic force adjusting portion and the key.
KR1020120090109A 2012-08-17 2012-08-17 Catapult nozzle with exterior spring KR20140023740A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120090109A KR20140023740A (en) 2012-08-17 2012-08-17 Catapult nozzle with exterior spring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120090109A KR20140023740A (en) 2012-08-17 2012-08-17 Catapult nozzle with exterior spring

Publications (1)

Publication Number Publication Date
KR20140023740A true KR20140023740A (en) 2014-02-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101657691B1 (en) * 2015-04-03 2016-09-19 김창겸 hot runner valve pin assembly
KR20170035687A (en) 2015-09-23 2017-03-31 주식회사 엘지화학 Optical element and display device comprising thereof
KR20170035686A (en) 2015-09-23 2017-03-31 주식회사 엘지화학 Optical element and display device comprising thereof
CN107962743A (en) * 2016-12-19 2018-04-27 上海默作精密仪器有限公司 The passive pin valve of runner is equipped with needle
KR20200084975A (en) * 2019-01-03 2020-07-14 이치호 Rubber injection molding machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101657691B1 (en) * 2015-04-03 2016-09-19 김창겸 hot runner valve pin assembly
KR20170035687A (en) 2015-09-23 2017-03-31 주식회사 엘지화학 Optical element and display device comprising thereof
KR20170035686A (en) 2015-09-23 2017-03-31 주식회사 엘지화학 Optical element and display device comprising thereof
CN107962743A (en) * 2016-12-19 2018-04-27 上海默作精密仪器有限公司 The passive pin valve of runner is equipped with needle
KR20200084975A (en) * 2019-01-03 2020-07-14 이치호 Rubber injection molding machine

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