KR101385447B1 - The nozzle device for hot runner valve system - Google Patents

The nozzle device for hot runner valve system Download PDF

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Publication number
KR101385447B1
KR101385447B1 KR1020130105546A KR20130105546A KR101385447B1 KR 101385447 B1 KR101385447 B1 KR 101385447B1 KR 1020130105546 A KR1020130105546 A KR 1020130105546A KR 20130105546 A KR20130105546 A KR 20130105546A KR 101385447 B1 KR101385447 B1 KR 101385447B1
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South Korea
Prior art keywords
valve
cap
hot runner
nozzle device
tip
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KR1020130105546A
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Korean (ko)
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이원영
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이원영
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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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/28—Closure devices therefor
    • B29C45/2806—Closure devices therefor consisting of needle valve systems
    • B29C45/281—Drive means 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
    • B29C45/26—Moulds
    • B29C45/27—Sprue channels ; Runner channels or runner nozzles
    • B29C45/28—Closure devices therefor
    • B29C45/2806—Closure devices therefor consisting of needle valve systems
    • B29C2045/2858—Materials or coatings therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
    • B29K2995/0015—Insulating

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

Abstract

The present invention relates to a nozzle device for a hot runner valve system. The nozzle device can reduce defect rates of products in injection molding by placing an insulating cap in a bypass space between a valve tip and a valve cap. The device includes the insulating cap which contacts the gap between the valve cap and the valve tip, provides heat-insulation between the valve tip and the valve cap, and absorbs shocks during the spray of a resin through the valve tip due to elasticity. The insulating cap can endure a temperature range of 450-500 deg. C and is made of thermosetting heat-resistant material capable of enduring an injection resin temperature range of 180-360 deg. C.

Description

핫러너밸브시스템의 노즐장치{the nozzle device for hot runner valve system}The nozzle device for hot runner valve system

본 발명은 핫러너밸브시스템의 노즐장치에 관한 것으로, 더 상세하게는 오픈게이트시스템(Open Gate System)에서 밸브팁과 밸브캡 사이의 단열공간에 단열캡을 구비하도록 함으로써 사출성형시 제품의 불량율을 급격히 낮출 수 있도록 한 핫러너밸브시스템의 노즐장치에 관한 것이다.
The present invention relates to a nozzle device of a hot runner valve system, and more particularly, to provide a defect rate of a product during injection molding by providing an insulation cap in an insulation space between a valve tip and a valve cap in an open gate system. It relates to a nozzle device of a hot runner valve system that can be lowered sharply.

대한민국 등록실용신안 20-387644호(사출 금형의 핫 런너 장치)에 따르면, "수지의 공급을 위한 런너가 형성된 메니폴드블록과, 상기 메니폴드 블록에 결합되며 상기 런너와 연통되는 수지공급을 위한 중공부가 형성된 노즐본체와, 상기 노즐 본체의 중공부에 설치되어 수지의 공급을 단속하는 밸브 핀과, 상기 밸브 핀의 외주면과 중공부의 노즐본체 내주면의 적어도 일측에 수지의 주입력에 의해 밸브 핀을 회전시키는 회전수단과, 상기 밸브 핀의 상단부를 회전 가능하게 지지하며 상기 밸브핀을 승강시키는 승강수단을 구비하여 된 것을 특징으로 한다."라고 개시된 바가 있다.According to the Republic of Korea Utility Model No. 20-387644 (hot runner device of the injection mold), "a manifold block formed with a runner for the supply of resin, and a hollow portion for the resin supply is coupled to the manifold block and is connected to the runner Rotation for rotating the valve pin by the injection force of the resin on at least one side of the nozzle body, the valve pin is provided in the hollow portion of the nozzle body to control the supply of resin, and the outer peripheral surface of the valve pin and the nozzle body inner peripheral surface of the hollow portion Means and a lifting means for rotatably supporting the upper end of the valve pin and lifting the valve pin. &Quot;

등록실용신안 20-387644호(사출 금형의 핫 런너 장치)Utility Model Registration No. 20-387644 (Hot Runner Device for Injection Mold)

종래의 핫러너밸브시스템의 노즐장치에는 도 1에 나타낸 바와 같이, 밸브팁과 밸브캡 사이가 일정간격 만큼 이격된 공간(A)이 존재하는데, 이 공간은 밸브팁과 밸브캡 사이를 단열시키기 위한 단열공간에 해당된다.As shown in FIG. 1, the nozzle device of the conventional hot runner valve system has a space A spaced apart from the valve tip by the valve cap by a predetermined distance, which is used to insulate the valve tip from the valve cap. Corresponds to the insulation space.

이러한 단열공간으로 인해서 사출성형을 위해서 수지가 노즐장치로부터 분사되기 시작하면 상기 단열공간을 먼저 채운 다음, 아래로 사출수지가 분사된다.When the resin starts to be injected from the nozzle device for the injection molding due to this insulation space, the injection resin is injected first, and then filled down the insulation space.

이는 단열공간을 이용하여 밸브팁과 밸브캡 사이에 온도차이를 두지 않고 같은 온도를 유지한다면 사출수지성형이 곤란해지기 때문이다.This is because injection resin molding becomes difficult if the same temperature is maintained without a temperature difference between the valve tip and the valve cap by using an insulating space.

그런데, 사출성형이 365일 24시간 내내 가동되는 것은 아니므로 1)휴업 후에 작업을 재가동할 때에는 상기 단열공간에 채워진 사출수지 때문에 불량제품이 수십개 이상 발생되고, 2)가동 중에도 가스가 차거나 상기 단열공간에 채워진 사출수지 일부가 따라서 흘러나오면서 함께 분사되어 불량제품이 주기적으로 발생되었다.However, since injection molding does not operate 24 hours a day, 365 days or more, 1) dozens of defective products are generated due to the injection resin filled in the insulation space when the work is restarted, and 2) gas is filled or the insulation space is in operation. Some of the injection resin filled in was ejected along with it, causing periodic defects.

이러한 문제점에도 불구하고 현재와 같은 노즐장치가 유지될 수 있었던 이유는 사출수지의 재질 단가 자체가 비교적 저렴하였기 때문에 가능하지만, 최근에는 재질 자체의 단가가 매우 높아진 사출수지가 개발되어 이들 수지의 불량률을 제조업체가 감당하기가 매우 곤란해지는 실정에 있다.In spite of these problems, the reason why the current nozzle device can be maintained is because the material cost of the injection resin itself is relatively inexpensive, but recently, an injection resin with a very high cost of the material itself has been developed to reduce the defect rate of these resins. Manufacturers are very difficult to handle.

본 발명은 상술한 문제점을 개선하기 위한 것으로, 밸브팁과 밸브캡 사이의 단열이 가능하도록 밸브팁과 밸브캡 사이에 탄력성이 강한 열경화성 내열소재로 이루어진 단열캡을 구비하도록 한 핫러너밸브시스템의 노즐장치를 제공하는데 그 목적이 있다.
The present invention is to improve the above problems, the nozzle of the hot runner valve system having a heat insulating cap made of a thermosetting heat-resistant heat-resistant material between the valve tip and the valve cap to enable the insulation between the valve tip and the valve cap The purpose is to provide a device.

상기 목적을 달성하기 위한 본 발명은 밸브핀, 밸브팁, 밸브캡을 가진 오픈게이트 방식의 핫러너밸브시스템의 노즐장치에 적용된다.The present invention for achieving the above object is applied to a nozzle device of an open gate hot runner valve system having a valve pin, a valve tip, a valve cap.

상기 핫러너밸브시스템의 노즐장치는 상기 밸브팁과 상기 밸브캡 사이를 접하고 상기 밸브팁과 상기 밸브캡 사이의 단열과, 탄력성이 있어서 밸브핀으로 인한 수지분사시 충격흡수를 위한 단열캡을 포함하고; 상기 단열캡은 450℃ ~ 500℃의 온도범위를 견딜 수 있고, 탄력성이 강하고 180℃ ~ 360℃의 사출수지온도범위를 견딜 수 있는 열경화성 내열(耐熱) 소재로 이루어진 것을 특징으로 한다.The nozzle device of the hot runner valve system includes an insulating cap for contacting between the valve tip and the valve cap, the insulation between the valve tip and the valve cap, and the elasticity and elasticity so as to absorb shock when spraying resin due to the valve pin. ; The thermal insulation cap is characterized by consisting of a thermosetting heat-resistant (耐熱) material that can withstand a temperature range of 450 ℃ ~ 500 ℃, strong elasticity and withstand the injection resin temperature range of 180 ℃ ~ 360 ℃.

실시예에서, 상기 단열캡의 상단 내경이 다각형상으로 성형하고 하단 내경이 원뿔형상으로 성형된 것이다.In an embodiment, the upper inner diameter of the insulating cap is molded into a polygonal shape and the lower inner diameter is formed into a conical shape.

실시예에서, 상기 밸브캡이 구비되지 않은 것이다.
In an embodiment, the valve cap is not provided.

본 실시예의 바람직한 양태에 따르면, 밸브팁과 밸브캡 사이의 단열을 종래에 비해서 대폭 향상시키면서도 종래의 단열공간을 형성하지 않기 때문에 종래에 발생되던 제품불량을 미연에 방지할 수 있는 장점이 있고, 저렴한 사출수지이든 매우 고가의 사출수지이든 상관없이 제품불량으로 인한 제조원가 상승을 미연에 방지할 수 있는 장점이 있다.
According to a preferred embodiment of the present embodiment, since the thermal insulation between the valve tip and the valve cap is greatly improved compared to the conventional one, but does not form a conventional thermal insulation space, there is an advantage in that it is possible to prevent product defects that have occurred in the past and inexpensively. Regardless of injection resin or very expensive injection resin, there is an advantage of preventing manufacturing cost increase due to product defects.

도 1은 종래의 핫러너밸브시스템의 노즐장치를 나타낸 단면도.
도 2는 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 사시도.
도 3은 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 분리사시도.
도 4는 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 분리단면도.
도 5는 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 조립단면도.1 is a cross-sectional view showing a nozzle device of a conventional hot runner valve system.
Figure 2 is a perspective view showing a nozzle device of the hot runner valve system according to the present invention.
Figure 3 is an exploded perspective view showing a nozzle device of the hot runner valve system according to the present invention.
Figure 4 is an exploded cross-sectional view showing a nozzle device of the hot runner valve system according to the present invention.
Figure 5 is an assembled cross-sectional view showing a nozzle device of the hot runner valve system according to the present invention.

이하, 첨부된 도면을 참조하여 본 발명을 상세히 설명하도록 한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

참고로, 일반적인 사출금형은 상부금형과 하부 금형이 상호 형합되어 성형하고자 하는 제품의 형상과 동일한 형상의 캐비티가 형성되고, 용융된 수지를 스프루(sprue), 런너(runner)와 게이트(gate)를 거쳐 상기 캐비티(cavity)에 고압으로 주입하여 제품을 성형하게 된다. 따라서, 핫러너밸브시스템(hot runner valve system)은 상부에서 투입된 칩 (chip)형태의 수지를 녹이고, 녹인 수지 즉, 용융수지를 분사하기 위한 노즐장치가 구비된다. 분사하기 위한 압력구동장치에는 피스톤(piston)에 의해서 이루어지고 분사여부는 피스톤에 고정된 밸브핀의 상승과 하강에 의해 노즐밸브의 개방이나 폐쇄가 이루어지고 분사압력에 필요한 공기의 흡입 및 배출은 에어홀을 통해서 이루어진다. 상기 피스톤은 제어신호에 따라서 실린더 내부를 상하로 이동하면서 상승하고 하강하게 된다.For reference, in general, the injection mold is formed by forming a cavity having the same shape as that of the product to be molded by combining the upper mold and the lower mold, and sprue, runner and gate of the molten resin. Through the injection into the cavity at high pressure to form a product. Therefore, the hot runner valve system is provided with a nozzle device for dissolving a resin in a chip form injected from the top and injecting the melted resin, that is, a molten resin. The pressure driving device for injection is made by a piston, and whether or not injection is performed by opening and closing the nozzle valve by raising and lowering the valve pin fixed to the piston. Through the hall. The piston moves up and down while moving up and down inside the cylinder according to a control signal.

본 발명에 따른 핫러너밸브시스템은 밸브핀을 가진 오픈게이트 방식의 핫러너밸브시스템의 노즐장치에 적용된다.The hot runner valve system according to the present invention is applied to a nozzle device of an open gate hot runner valve system having a valve pin.

도 2는 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 사시도이고, 도 3은 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 분리사시도이며, 도 4는 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 분리단면도이며, 도 5는 본 발명에 따른 핫러너밸브시스템의 노즐장치를 나타낸 조립단면도이다.Figure 2 is a perspective view showing a nozzle device of the hot runner valve system according to the present invention, Figure 3 is an exploded perspective view showing a nozzle device of the hot runner valve system according to the present invention, Figure 4 is a hot runner valve system according to the present invention Fig. 5 is an exploded cross-sectional view showing a nozzle apparatus of Fig. 5 is an assembled cross-sectional view showing a nozzle apparatus of a hot runner valve system according to the present invention.

밸브핀(도면 생략, 참조부호 없음)이 상승하거나 하강하는 공간이면서 사출수지가 분사되는 경로인 밸브팁(valve tip; 11)과 상기 밸브팁(11)을 감싸면서 열전도율이 낮은 재질로 이루어져 단열기능을 가지고 탄력성이 있어서 밸브핀으로 인한 수지분사시 충격흡수를 위한 단열캡(斷熱 Cap; 12)이 구비된다.Insulation function consisting of a valve tip (11) and a valve tip (11) and a material having a low thermal conductivity while the valve pin (not shown, no reference numeral) is a space in which the injection resin is injected while rising or falling space It has elasticity and is provided with a heat insulating cap (12 Cap) 12 for shock absorption during resin injection due to the valve pin.

상기 단열캡(12)을 포함하는 바디(body; 14) 하단을 감싸는 밸브캡(Valve Cap; 13)과, 하단에 상기 밸브캡(13)을 수용하고 중공부가 형성되며 외부 둘레에 히터(16)가 감겨진 노즐본체(15)가 구비된다. 이때, 상기 히터(heater; 16)는 상기 밸브팁(11)으로부터 분사되는 사출수지가 굳는 것을 방지하기 위해 설정온도를 유지하기 위한 가열수단이다.A valve cap 13 surrounding a lower end of the body 14 including the heat insulating cap 12 and a valve part 13 are received at a lower end thereof, and a hollow part is formed and a heater 16 is formed around the outside. Is wound around the nozzle body 15 is provided. In this case, the heater 16 is a heating means for maintaining a set temperature to prevent the injection resin injected from the valve tip 11 is hardened.

상기 밸브캡(13)은 상기 바디(14)에 나사산이 형성되어 회동하여 체결되는 구조이고, 상기 밸브팁(11)도 상기 노즐본체(15)에 나사산이 형성되어 회동하여 체결되는 구조이다. 반면에, 상기 단열캡(12)은 상기 밸브팁(11)에 별도의 체결장치 없이 상기 단열캡(12)이 상기 밸브팁(11)에 그냥 끼워지도록 한다.The valve cap 13 has a structure in which a screw thread is formed in the body 14 to be rotated and fastened, and the valve tip 11 is also a structure in which a screw thread is formed in the nozzle body 15 to be rotated and fastened. On the other hand, the heat insulating cap 12 allows the heat insulating cap 12 to be fitted to the valve tip 11 without a separate fastening device on the valve tip 11.

상기 노즐본체(15)의 하단 내경과 상기 밸브팁(11)의 상단 외경에는 상기 노즐본체(15)에 상기 밸브팁(11)을 체결시키기 위한 나사산이 형성된다.A screw thread for fastening the valve tip 11 to the nozzle body 15 is formed at the lower inner diameter of the nozzle body 15 and the upper outer diameter of the valve tip 11.

따라서, 사출수지분사시 밸브핀의 상하이동으로 인한 충격에도 원래의 위치를 이탈하지 않고 견고하게 고정될 수 있고, 히터(16)로 인한 가열로 인한 재질의 팽창과 수축에도 불구하고 원래의 위치를 지킬 수 있다.Therefore, the injection pin can be firmly fixed even when the valve pin is not deviated from the impact due to the movement of the valve pin, and the original position is maintained despite the expansion and contraction of the material due to the heating by the heater 16. I can keep it.

상술한 바와 같은 노즐장치에는 용융된 사출수지의 분사가 진행될 때 밸브팁(11)과 밸브캡(13) 사이에 어떠한 틈도 없기 때문에 용용수지가 캐비티로 바로 분사될 뿐만 아니라, 밸브팁(11)과 밸브캡(13) 사이의 단열도 함께 수행하므로 작업안정성과 열적안정성을 모두 만족시킬 수 있다.Since there is no gap between the valve tip 11 and the valve cap 13 when the injection of the molten injection resin proceeds in the nozzle device as described above, the molten resin is not only directly injected into the cavity, but also the valve tip 11. Since the heat insulation between the valve cap and the 13 is also performed, both work stability and thermal stability can be satisfied.

즉, 종래의 단열공간을 거쳐서 용융수지가 분사되지 않기 때문에 제품의 불량을 유발하지 않고, 이와 동시에 밸브팁(11)과 밸브캡(13) 사이의 온도차이를 유지시키는 이유는 열전도율이 매우 낮은 단열 소재이므로 열적으로도 매우 안정적인 기능을 할 수 있다.That is, since the molten resin is not injected through the conventional heat insulating space, it does not cause product defects and at the same time maintains the temperature difference between the valve tip 11 and the valve cap 13 because the heat conductivity is very low. As it is a material, it can function very thermally.

한편, 상기 단열캡(12)의 상단 내경은 매우 다양한 형상으로 성형될 수 있는데, 예를 들어 다각형상으로 성형할 수 있다. 다각형상이므로, 정사각 형상, 정육각 형상, 정팔각 형상, 정삼각 형상 등이 있을 수 있다. 뿐만 아니라, 상기 단열캡(12)의 하단 내경은 원뿔형상 등으로 성형될 수 있다.On the other hand, the inner diameter of the upper end of the insulating cap 12 may be molded in a variety of shapes, for example, may be molded in a polygonal shape. Since it is polygonal, there may be a square shape, a regular hexagon shape, an octagonal shape, an equilateral triangle shape, and the like. In addition, the inner diameter of the lower end of the insulating cap 12 may be molded in a cone shape or the like.

전술한 바와 같은 실시예는 밸브캡(13)이 구비된 노즐장치를 예시하였는데, 제품별, 소재별 작업의 필요성에 따라서 밸브캡(13)이 구비되지 않은 노즐장치에도 본 발명을 적용시킬 수 있다.The embodiment as described above illustrates a nozzle device provided with a valve cap 13, the present invention can be applied to a nozzle device that is not provided with a valve cap 13, depending on the needs of work by product, material. .

즉, 노즐장치가 밸브캡(13) 없이, 밸브팁(11), 단열캡(12), 바디(14), 노즐본체(15), 히터(16)로 이루어진 노즐장치가 실시될 수 있다.
That is, the nozzle device without the valve cap 13, the nozzle device consisting of the valve tip 11, the insulating cap 12, the body 14, the nozzle body 15, the heater 16 can be implemented.

11 ; 밸브팁 12 ; 단열캡
13 ; 밸브캡 14 ; 바디
15 ; 노즐본체 16 ; 히터11; Valve tip 12; Insulation Cap
13; Valve cap 14; body
15; Nozzle body 16; heater

Claims (3)

밸브핀, 밸브팁, 밸브캡을 가진 오픈게이트 방식의 핫러너밸브시스템의 노즐장치에 있어서,
상기 밸브팁과 상기 밸브캡 사이를 접하고 상기 밸브팁과 상기 밸브캡 사이의 단열과, 탄력성이 있어서 밸브핀으로 인한 수지분사시 충격흡수를 위한 단열캡을 포함하고;
상기 단열캡은 450℃ ~ 500℃의 온도범위를 견딜 수 있고, 180℃ ~ 360℃의 사출수지온도범위를 견딜 수 있는 열경화성 내열(耐熱) 소재로 이루어지고;
상기 단열캡의 상단 내경이 다각형상으로 성형하고 하단 내경이 원뿔형상으로 성형된 핫러너밸브시스템의 노즐장치.
A nozzle device of an open gate hot runner valve system having a valve pin, a valve tip, and a valve cap,
A heat insulation cap between the valve tip and the valve cap, the insulation between the valve tip and the valve cap, and elasticity, the insulation cap being configured to absorb shock due to the valve pin;
The insulation cap is made of a thermosetting heat-resistant material that can withstand a temperature range of 450 ℃ ~ 500 ℃, can withstand the injection resin temperature range of 180 ℃ ~ 360 ℃;
And a nozzle apparatus of the hot runner valve system in which the upper inner diameter of the insulating cap is formed into a polygonal shape and the lower inner diameter is formed into a conical shape.
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KR1020130105546A 2013-09-03 2013-09-03 The nozzle device for hot runner valve system KR101385447B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101932065B1 (en) * 2017-08-24 2018-12-27 주식회사 와이드 Hot runner open nozzle assembly
KR101939580B1 (en) * 2017-07-10 2019-01-18 김관표 Single nozzle for injection molder

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002316342A (en) * 2001-04-20 2002-10-29 Nissei Asb Mach Co Ltd Preform molding apparatus
KR20050002768A (en) * 2004-12-15 2005-01-10 허남욱 Hot runner valve nozzle formed adiabatic space on circumference a valve gate
JP2009262324A (en) 2008-04-21 2009-11-12 Marugo Rubber Ind Co Ltd Injection molding nozzle for rubber product
KR101136760B1 (en) 2011-06-24 2012-05-03 주식회사 엠엔에이치 Ceramic nozzle device for hot-runner system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002316342A (en) * 2001-04-20 2002-10-29 Nissei Asb Mach Co Ltd Preform molding apparatus
KR20050002768A (en) * 2004-12-15 2005-01-10 허남욱 Hot runner valve nozzle formed adiabatic space on circumference a valve gate
JP2009262324A (en) 2008-04-21 2009-11-12 Marugo Rubber Ind Co Ltd Injection molding nozzle for rubber product
KR101136760B1 (en) 2011-06-24 2012-05-03 주식회사 엠엔에이치 Ceramic nozzle device for hot-runner system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101939580B1 (en) * 2017-07-10 2019-01-18 김관표 Single nozzle for injection molder
KR101932065B1 (en) * 2017-08-24 2018-12-27 주식회사 와이드 Hot runner open nozzle assembly

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