KR20240062836A - Injection Molding Apparatus - Google Patents

Abstract

The injection molding device includes a hot runner device provided to discharge molten resin, and the injection molding upper part includes a mold including a depression into which the hot runner device is inserted so that the hot runner device is mounted. The hot runner device includes a hollow nozzle including a resin flow path through which molten resin flows and an outlet through which the resin is discharged, and includes a heater provided at the nozzle to heat the resin. Additionally, it includes a union coupled to the nozzle and mounted on the mold so that the nozzle is mounted on the mold without contacting the mold. The union is disposed between the first union and the mold so that the first union is mounted spaced apart from the mold and a first union provided on the outer periphery of the outlet side of the nozzle, and prevents heat from the heater from being conducted from the first union to the mold. It includes a second union made of an insulating material to block it.

Description

Injection Molding Apparatus {Injection Molding Apparatus}

The present disclosure relates to an injection molding device, and more particularly to an injection molding device including a hot runner device.

In general, an injection molding device for molding injection products supplies molten resin injected into a manifold into the molding space formed by the upper and lower molds (molds), that is, into the cavity, through one or more nozzles connected to the lower part of the manifold. It is a device. This type of injection molding device is configured to open and close the gate by lifting and lowering the valve pin, and may include a manifold type used when molding a plurality of injection products simultaneously and a single type used when molding one injection product. You can.

The hot runner device is a device that heats the sprue and runner, which serve as a flow path for molten resin, to keep the sprue and runner in a molten state at all times, allowing continuous injection of injection molded products, including pneumatic and hydraulic pressure. A valve nozzle system is used to mold the injection product by selectively opening and closing the gate of the mold by sliding the valve pin within the nozzle during injection and packing. When the resin is filled in a molten state up to the gate of the mold, It can be divided into an open nozzle system that seals the gate using cooling of the mold, etc., and a short off system that seals the gate by electrical action.

The resin contained in the injection molding device may be heated by a heater, melted, and flow into the nozzle. Afterwards, when the gate is opened by the rise of the valve pin inserted into the nozzle, injection of molten resin proceeds, and when the gate is closed by the descent of the valve pin, injection of molten resin may be blocked.

According to one example, an injection molding device that prevents damage to products due to heat from a heater is provided.

According to one example, an injection molding device is provided that can reduce the increase in maintenance costs of the injection molding device caused by the elevation of the valve pin.

According to one example, an injection molding device is provided that can prevent the phenomenon of resin flowing back into the injection molding device.

The technical problem to be achieved in this document is not limited to the technical problem mentioned above, and other technical problems not mentioned can be clearly understood by those skilled in the art from the description below. There will be.

An injection molding apparatus according to one embodiment includes a hot runner device provided to discharge molten resin. The injection molding unit includes a mold including a depression into which the hot runner device is inserted so that the hot runner device is mounted. The hot runner device includes a hollow nozzle including a resin flow path through which the molten resin flows and an outlet through which the resin is discharged. The hot runner device includes a heater provided in the nozzle to heat the resin. The hot runner device includes a union coupled to the nozzle and mounted on the mold so that the nozzle is mounted on the mold without contacting the mold. The union includes a first union provided on the outer periphery of the outlet side of the nozzle. The union is disposed between the first union and the mold so that the first union is mounted spaced apart from the mold, and is made of an insulating material to block heat from the heater from being conducted from the first union to the mold. Includes the second union.

The injection molding apparatus may further include a bush that is inserted into the depression to be disposed between the nozzle and the mold and coupled to the mold, and includes a gate provided to communicate with the outlet.

The second union may be positioned between the first union and the bush so that the nozzle and the first union do not contact the bush.

The bush may be provided to be detachable from the mold.

The second union may include an upper support surface supporting the first union. The second union may include an outer support wall supported on the inner wall of the mold forming the depression.

The outer support wall may include a lower support surface supported on the bottom of the depression. The outer support wall may include a side support surface extending from the lower support surface to be supported on the side wall of the depression.

The depression may include a first depression provided between the nozzle and the bush. The depression may include a second depression provided between the nozzle and the mold. The second union may be arranged so that the first recessed portion and the second recessed portion are separated.

The second union may be formed on the outer periphery of the first union and may be disposed not to contact the nozzle.

The second union may include a hollow cylindrical shape. The nozzle may be provided to pass through the second union.

The hot runner device may further include a valve pin inserted within the nozzle to be able to be lifted up and down in the longitudinal direction of the nozzle. One end of the valve pin adjacent to the outlet is provided to be inserted into the outlet and the gate during the lifting and lowering process of the valve pin, so that the outlet and the gate can be selectively opened and closed.

The mold may include a cooling line provided in a direction parallel to the direction in which the nozzle extends.

The hot runner device may be provided to be separable from the mold.

The injection molding apparatus according to one embodiment includes a receiving chamber in which the resin is accommodated. The injection molding apparatus includes a manifold provided to heat the resin. The injection molding device includes a hot runner device that communicates with the manifold to receive the molten resin and discharge it into a cavity of the injection molding device. The injection molding device includes a mold including a depression into which the hot runner device is inserted so that the hot runner device is mounted. The hot runner device includes a hollow nozzle that is in communication with the manifold and includes a resin flow path through which the molten resin is supplied, and an outlet through which the resin is discharged. The hot runner device includes a valve pin inserted into the nozzle so as to be able to move up and down in the longitudinal direction of the nozzle. The hot runner device includes a heater provided at the nozzle to heat the supplied resin. The hot runner device includes a union coupled to the nozzle and mounted on the mold so that the nozzle is mounted on the mold without contacting the mold. The union includes a first union provided on the outer periphery of the outlet side of the nozzle. The union is disposed between the first union and the mold so that the first union is mounted spaced apart from the mold, and is made of an insulating material to block heat from the heater from being conducted from the first union to the mold. Includes the second union.

The injection molding apparatus may further include a bush that is inserted into the depression to be disposed between the nozzle and the mold and coupled to the mold, and includes a gate provided to communicate with the outlet. The second union may be positioned between the first union and the bush so that the nozzle and the first union do not contact the bush.

The bush may be provided to be detachable from the mold.

The second union may include an upper support surface supporting the first union. The second union may include an outer support wall supported on the inner wall of the mold forming the depression. The outer support wall may include a lower support surface supported on the bottom of the depression, and a side support surface extending from the lower support surface to be supported on the side wall of the depression.

The depression may include a first depression provided between the nozzle and the bush. The depression may include a second depression provided between the nozzle and the mold. The second union may be arranged so that the first recessed portion and the second recessed portion are separated.

One end of the valve pin adjacent to the outlet is provided to be inserted into the outlet and the gate during the lifting and lowering process of the valve pin, so that the outlet and the gate can be selectively opened and closed.

The second union may include a hollow cylindrical shape. The nozzle may be provided to pass through the second union.

The hot runner device may be provided to be separable from the mold.

According to one example, the second union is made of an insulating material to prevent damage to the product due to heat from the heater.

According to one example, the maintenance cost of the entire injection molding device can be reduced by manufacturing the part worn by the elevation of the valve pin into a bush that is detachable from the mold and replacing only the bush.

According to one example, the second union is arranged to partition the first depression and the second depression, thereby preventing the resin discharged from the outlet from flowing back toward the second depression.

The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description below. will be.

1A to 1D are diagrams schematically showing the process of injecting an injection molded product using an injection molding device equipped with a hot runner device according to an embodiment.
Figure 2 is a diagram illustrating a hot runner device according to an embodiment.
Figure 3 is an exploded view of a hot runner device according to an embodiment.
Figure 4 is an enlarged view of the outlet side end of the hot runner device according to an embodiment.
FIG. 5 is a diagram illustrating heat conduction in a heater of a hot runner device according to an embodiment.

The embodiments described in this specification and the configurations shown in the drawings are only preferred examples of the disclosed invention, and at the time of filing this application, there may be various modifications that can replace the embodiments and drawings in this specification.

In addition, the same reference numbers or symbols shown in each drawing of this specification indicate parts or components that perform substantially the same function.

Additionally, the terms used herein are used to describe embodiments and are not intended to limit and/or limit the disclosed invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. The existence or addition of numbers, steps, operations, components, parts, or combinations thereof is not excluded in advance.

In addition, terms including ordinal numbers such as “first”, “second”, etc. used in this specification may be used to describe various components, but the components are not limited by the terms, and the terms It is used only for the purpose of distinguishing one component from another. For example, a first component may be named a second component, and similarly, the second component may also be named a first component without departing from the scope of the present invention. The term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.

Meanwhile, the shape and position of each component are not limited by terms such as “front,” “back,” “left,” “right,” “top,” and “bottom” used in the following description.

When a component is said to be “connected,” “coupled,” “supported,” or “in contact” with another component, this means not only when the components are directly connected, coupled, supported, or in contact, but also when a third component This includes cases where it is indirectly connected, coupled, supported, or contacted through.

When a component is said to be located “on” another component, this includes not only cases where a component is in contact with another component, but also cases where another component exists between the two components.

In referring to the direction of rotation, clockwise may be expressed as a first direction, and counterclockwise, which is the opposite direction of the first direction, may be expressed as a second direction. This expression may be used to describe specific details for carrying out the invention, but the rotation direction of the components of the present invention is not limited by this term.

Hereinafter, an embodiment will be described in detail with reference to the attached drawings.

1A to 1D are diagrams schematically showing the process of injecting an injection molded product using an injection molding device equipped with a hot runner device according to an embodiment.

In the drawings and descriptions, the injection molding device to which the hot runner device is applied is shown and described as a manifold-type injection device that molds multiple injection products simultaneously, but this is only an example and is also used in the case of a single-type injection device that molds one injection product. It goes without saying that the hot runner device of the invention can be applied.

1A to 1D, the injection molding apparatus 1 may include a mold 10 and an ejector 50.

The mold 10 may include an upper mold 20 and a lower mold 30 that are opposed to each other. The upper mold 20 and the lower mold 30 may be combined with each other to form a cavity 40 having a shape corresponding to the injection molded product 70 to be manufactured.

A depression 160 may be formed in the upper mold 20, and a hot runner device 100 may be inserted and mounted in the depression 160. The hot runner device 100 may be provided to be separable from the upper mold 20.

A clamping plate ( 21), a spacer plate 22, and a reinforcement plate 23. The spacer plate 22 may be located between the clamping plate 21 and the reinforcement plate 23. The clamping plate 21 may be located on top of the spacer plate 22. The reinforcement plate 23 may be located below the spacer plate 22. The upper mold 20 may further include an upper core 24. The upper core 24 may be installed on the reinforcement plate 23. The upper core 24 may be provided with an upper molding surface 24a having a shape corresponding to the upper surface of the injection molded product 70.

The lower mold 30 may include a lower mold plate 31, a space block 32, and an installation plate 33. The lower mold plate 31, space block 32, and installation plate 33 may have a sequentially stacked structure, and the clamping plate 21, spacer plate 22, and reinforcement plate 23 of the upper mold 20 Together they can support the cavity 40. The lower mold 30 may further include a lower core 34. The lower core 34 may be installed on the lower template 31. The lower core 34 may be provided with a lower molding surface 34a whose shape corresponds to the lower surface of the injection-molded product 70. A cavity 40 having a shape corresponding to the injection molded product 70 may be formed between the upper core 24 and the lower core 34. In other words, the cavity 40 may be formed by the upper molding surface 24a and the lower molding surface 34a.

The lower plate 31 may be combined with the reinforcement plate 23 to form the cavity 40. An installation plate 33 may be located below the lower plate 31. A space block 32 may be positioned between the lower mold plate 31 and the installation plate 33 to form a space where the ejector 50 can be placed. That is, the lower mold plate 31, the space block 32, and the installation plate 33 form a space where the ejector 50 can be placed to move up and down, and at the same time, they can form the appearance of the lower mold 30. .

The ejector 50 is inserted into the lower plate 31 and includes an ejector pin 51 for ejecting the injection product 70, an ejector plate 52,53 on which the ejector pin 51 is seated, and an ejector plate 52,53. ) and may include an elastic member 54 for elastic restoration. Additionally, the ejector plates 52 and 53 may include a first plate 52 and a second plate 53.

Specifically, the ejector pin 51 is mounted on the ejector plates 52 and 53 and moves up and down, and when moving up and down, at least a portion of the ejector pin 51 penetrates the lower mold plate 31 and pushes the injection product 70. You can raise it. The ejector pin 51 may be provided on the ejector plates 52 and 53 to be detachable, and the user may replace it with an ejector pin 51 corresponding to the shape of the injection product 70.

An extraction hole (33a) may be formed in the installation plate 33. The take-out hole 33a is a passage through which the take-out means 60 moves up and down by external force to push the ejector plates 52 and 53 upward, and may be formed to penetrate the installation plate 33.

The injection molding device 1 may further include a hot runner system 100. The hot runner device 100 is a system that can continuously produce the injection molded product 70 by heating the moving flow path of the resin (resin) for filling the cavity 40 and maintaining the resin (resin) in a molten state at all times. A detailed description of the hot runner device 100 will be described later.

Hereinafter, the process of injecting the injection-molded product 70 will be described in detail with reference to FIGS. 1A to 1D.

As shown in Figure 1A, the mold 10 may be in an open state. That is, the upper mold 20 and the lower mold 30 may exist in a separate state. At this time, the gate 171 (see Figure 2) may be closed by the valve pin 130 (see Figure 2).

As shown in FIG. 1B, when the injection process of the injection molded product 70 progresses, the mold 10 may be in a closed state. That is, the upper mold 20 and the lower mold 30 may be combined with each other to form the cavity 40. At this time, the gate 171 may still be closed by the valve pin 130.

As shown in FIG. 1C, the resin injected into the injection port 2 fills the receiving chamber 121 formed by the manifold 120 (see FIG. 2). At this time, the valve pin 130 is raised by the piston assembly 110 (see Figure 2), and the gate 171 can be opened accordingly. When the gate 171 is opened by the rise of the valve pin 130, the resin moves from the receiving chamber 121 of the manifold 120 to the cavity 40 and fills the cavity 40.

As shown in FIG. 1D, when resin fills the cavity 40, the valve pin 130 is lowered by the piston assembly 110, and the gate 171 can be closed accordingly. When the gate 171 is closed by the lowering of the valve pin 130, the supply of resin to the cavity 40 is blocked. When the molten resin solidifies within the cavity 40 and the injection mold 70 is completed, the upper mold 20 and the lower mold 30 are separated. When the upper mold 20 and the lower mold 30 are separated, the injection product 70 can be ejected by the ejector 50, which is raised by the ejection means 60.

Figure 2 is a diagram illustrating a hot runner device according to an embodiment.

Referring to FIG. 2, the piston assembly 110 may be arranged to lift the valve pin 130. The piston assembly 110 is installed on the clamping plate 21, has a piston 111 coupled to the valve pin 130 built in, and is a housing configured to allow the piston 111 to be raised and lowered by hydraulic or pneumatic pressure. It may include (112). Additionally, the piston assembly 110 may further include a cover 113 disposed to seal the open top of the housing 112. In addition, the piston assembly 110 has a CPS ring 114 arranged to space the manifold 120 and the clamping plate 21 and at the same time allow the clamping plate 21 to press the manifold 120. More may be included.

The hot runner device 100 may further include a manifold 120. A receiving chamber 121 through which resin is supplied and moves may be formed in the manifold 120. Specifically, the receiving chamber 121 may be formed inside the manifold 120. The manifold 120 is arranged to keep the temperature of the molten resin moving along the receiving chamber 121 constant while supplying the molten resin to the resin flow path 143 provided in the nozzle 141 (described below). You can.

The hot runner device 100 may include a hollow nozzle 141 including a resin flow path 143 through which molten resin flows and an outlet 146 through which the resin is discharged. The hot runner device 100 may further include a valve pin 130 inserted into the nozzle 141 so as to be lifted up and down in the longitudinal direction of the nozzle 141.

The valve pin 130 can open and close the outlet 146 formed at one end of the nozzle 141 by moving up and down.

A bush 170 including a gate 171 provided to communicate with the outlet 146 may be coupled to the mold 10. The bush 170 may be inserted into the depression 160 to be disposed between the nozzle 141 and the mold 10. The bush 170 may be provided to be detachable from the mold 10 .

The valve pin 130 can open and close the gate 171 by moving up and down.

The valve pin 130 can selectively open and close the outlet 146 and the gate 171 to control whether or not the molten resin moving along the receiving chamber 121 is discharged. In other words, the outlet 146 and the gate 171 can be selectively opened and closed according to the elevation of the valve pin 130.

When the outlet 146 and the gate 171 are closed by the lowering of the valve pin 130, the discharge of the molten resin moving along the resin flow path 143 is blocked. When the outlet 146 and the gate 171 are opened by the rise of the valve pin 130, the molten resin moving along the resin flow path 143 is discharged into the cavity 40.

One end of the valve pin 130 adjacent to the gate 171 opens and closes the gate 171 during the lifting and lowering process of the valve pin 130 and may be in continuous contact with the bush 170. Through this, the bush 170 may be damaged and broken, or foreign substances generated as the bush 170 is worn may be discharged out of the gate 171 together with the molten resin. Since the bush 170 is provided to be separable from the mold 10, if the bush 170 is damaged, the injection molding apparatus 1 can be continued to be used by replacing only the bush 170. As a result, the maintenance cost of the injection molding device 1 can be reduced.

A coupling portion 133 may be formed at the other end of the valve pin 130. Specifically, the coupling portion 133 may be coupled to the piston 111 so that the valve pin 130 can be raised and lowered integrally with the piston 111. The valve pin 130 may be manufactured to have a different length or width depending on the thermal expansion rate and the position of the gate 171, and in particular, may be formed in various shapes depending on the shape of the injection molded product 70.

A pin moving part 142 and at least one resin moving part 143 may be provided inside the nozzle 141. The pin moving part 142 and the at least one resin moving part 143 may communicate with the receiving chamber 121 of the manifold 120. The pin moving part 142 and at least one resin moving part 143 may communicate with the resin flow path 143 of the nozzle 141. That is, the molten resin moving along the receiving chamber 121 may flow into the resin flow path 143 provided in the nozzle 141 through the pin moving part 142 and at least one resin moving part 143.

Figure 3 is an exploded view of a hot runner device according to an embodiment. Figure 4 is an enlarged view of the outlet side end of a hot runner device according to an embodiment.

Referring to Figures 3 and 4, the hot runner device 100 includes a hollow nozzle 141 including a resin flow path 143 through which molten resin flows and an outlet 146 through which resin is discharged. The hot runner device 100 may include a heater 190 provided at the nozzle 141 to heat the resin so that the molten resin can continuously flow within the resin flow path 143 by maintaining the temperature of the molten resin. In the drawing, the heater 190 is shown in contact with the outer diameter of the nozzle 141 and surrounds the outside of the nozzle 141, but heat is applied so that the resin flowing in the resin passage 143 is maintained in a molten state. The form is not limited to this, as long as it is possible.

The nozzle 141 may be mounted on the mold 10 by being inserted into the recess 160 of the mold 10. At this time, the nozzle 141 can be mounted on the mold 10 without contacting the mold 10 due to the first union 150 and the second union 180. More specifically, the first union 150 may be provided to surround the outer periphery of the nozzle 141. Through this, the nozzle 141 can be provided so as not to contact the mold 10.

The first union 150 is coupled with the nozzle 141, so that the nozzle 141 is seated at a specific position of the mold 10 intended by the user when the nozzle 141 is coupled with the mold 10. . The first union 150 may be formed of a metal material.

The second union 180 may be disposed between the first union 150 and the mold 10 so that the first union 150 is mounted spaced apart from the mold 10. That is, the second union 180 may be prepared to be coupled to the first union 150 without contacting the mold 10 .

The second union 180 may be combined with the first union 150 to surround the outer circumference of the first mold 10. The second union 180 is combined with the first union 150 and may serve to guide the nozzle 141 and the first union 150 to be seated at a specific position in the mold 10.

The second union 180 may be coupled to the first union 150 in a way that supports the first union 150. More specifically, the second union 180 is disposed at the bottom of the first union 150 so that the second union 180 connects the nozzle 141 inserted into the depression 160 and the first union 150. They can all be arranged in a supporting form. That is, the second union 180 may include an upper support surface 181 that supports the first union 150.

The second union 180 has outer support walls 182 and 183 supported on the inner wall 164 of the mold 10 forming a depression 160 in supporting the nozzle 141 and the first union 150. may include. That is, the second union 180 may be inserted into the depression 160 in a form in contact with the inner wall 164 of the depression 160 and mounted on the mold 10.

The inner wall 164 of the depression 160 may include a side wall 165 of the depression 160 and a bottom 166 of the depression 160. That is, the outer support walls 182 and 183 of the second union 180 support the side support surface 182 that supports the side wall 165 of the depression 160 and the bottom 166 of the depression 160. It may include a lower support surface 183. The side support surface 182 may extend from the lower support surface 183. The side support surface 182 and the lower support surface 183 may be provided to contact the side wall 165 of the depression 160 and the bottom 166 of the depression 160 at the same time.

By this arrangement, the nozzle 141 can be coupled to the mold 10 so as not to contact the mold 10. Additionally, the first union 150 may also be coupled to the mold 10 so as not to contact the mold 10 . In the form in which the second union 180 is combined with the first union 150, the shape of the second union 180 is provided to include a hollow cylindrical shape and can be formed on the outer periphery of the first union 150. . In this case, the second union 180 may be arranged not to contact the nozzle 141, and the nozzle 141 may be arranged to pass through the second union 180.

A bush 170 may be mounted on the mold 10. More specifically, the bush 170 may be inserted into the depression 160 and coupled to the mold 10 so as to be disposed between the nozzle 141 and the mold 10. The bush 170 may include a gate 171, and the outlet 146 of the nozzle 141 and the gate 171 of the bush 170 may be in communication.

When the bush 170 is combined with the mold 10, the second union 180 can simultaneously contact the upper end of the bush 170 and the bottom 166 of the depression 160. The second union 180 may be disposed between the bush 170 and the first union 150. That is, the height of the upper end of the bush 170 mounted on the mold 10 may be the same as the height of the bottom 166 of the depression 160.

By this arrangement, the second union 180 can support the nozzle 141 and the first union 150 so that the nozzle 141 and the first union 150 do not contact the bush 170.

When the nozzle 141 is mounted on the recessed portion 160, the second union 180 may be provided to partition the recessed portion 160. That is, the depression 160 may include a first depression 161 provided between the nozzle 141 and the bush 170 by the second union 180, and the nozzle 141 and the mold 10 ) may include a second recessed portion 162 provided between them. The first recessed portion 161 and the second recessed portion 162 may be provided to be isolated from each other by the second union 180. Therefore, when the resin is discharged from the outlet 146 of the nozzle 141 located on the first depression 161 side, it is blocked by the second union 180 and will not flow back toward the second depression 162. You can.

FIG. 5 is a diagram illustrating heat conduction in a heater of a hot runner device according to an embodiment.

Referring to FIG. 5, a heater 190 may be provided in the nozzle 141. The heater 190 may be provided to apply heat to the resin flowing in the resin flow path 143 within the nozzle 141. Through this, the resin in the resin flow path 143 can be maintained in a molten state. At this time, since both the nozzle 141 and the first union 150 are made of metal, heat from the heater 190 may be conducted toward the nozzle 141 and the first union 150. If the heat is also conducted to the mold 10, it may have a negative effect on the product. To prevent this, the second union 180 may be made of an insulating material to block heat from the heater 190 from being conducted to the mold 10.

As seen previously, the nozzle 141 and the first union 150 may be provided so as not to contact the mold 10 and the bush 170, and only the second union 180 may be used to contact the mold 10 and the bush 170. ), so that the hot runner device 100 can be supported within the recessed portion 160 of the mold 10. In such a case, if the second union 180 is made of an insulating material, the heat conducted to the nozzle 141 and the first union 150 through the heater 190 will not be conducted to the second union 180. You can. Accordingly, the heat of the heater 190 may not be conducted to the mold 10 and the bush 170. Through this, damage to the product due to the heat of the heater 190 can be prevented.

The mold 10 may include a cooling line 163 provided in a direction parallel to the direction in which the nozzle 141 extends. Even if the nozzle 141 does not directly contact the mold 10, the temperature of the mold 10 may increase due to heat transfer by radiation. A cooling line 163 may be formed in the mold 10 on the heater 190 side to control this.

In the above, specific embodiments are shown and described. However, it is not limited to the above-mentioned embodiments, and those skilled in the art can make various changes without departing from the gist of the technical idea of the invention as set forth in the claims below. .

1: Injection molding device 10: Mold
2: Inlet
20: Upper type 21: Clamping plate
22: spacer plate 23: reinforcement plate
24: upper core 24a: upper molding surface
30: lower type 31: lower type plate
32: Space block 33: Installation plate
34: lower core 34a: lower molded surface
33a: extraction hole 40: cavity
50: Ejector 51: Ejector pin
52: first plate 53: second plate
54: elastic member 60: extraction means
70: Injection 100: Hot runner device
110: Piston assembly 111: Piston
112: housing 113: cover
114: CPS ring 120: Manifold
121: Receiving chamber 130: Valve pin
131: body 133: coupling part
141: nozzle 142: pin moving part
143: Resin Euro
146: outlet
150: 1st Union
160: depression
161: first depression
162: Second depression
163: Cooling line
164: inner wall
165: side wall
166: floor
170: Bush
171: gate
180: 2nd Union
181: upper support surface
182: side support surface
183: lower support surface
190: Heater

Claims (20)

A hot runner device arranged to discharge molten resin; and
a mold including a recess into which the hot runner device is inserted so that the hot runner device is mounted; In the injection molding device comprising,
The hot runner device,
a hollow nozzle including a resin flow path through which the molten resin flows and an outlet through which the resin is discharged;
a heater provided in the nozzle to heat the resin; and
a union coupled to the nozzle and mounted on the mold so that the nozzle is mounted on the mold without contacting the mold; Including,
The union is,
A first union provided on the outer periphery of the outlet side of the nozzle and
A second union is disposed between the first union and the mold so that the first union is mounted spaced apart from the mold, and is made of an insulating material to block heat from the heater from being conducted from the first union to the mold. Injection molding device including. According to paragraph 1,
The injection molding apparatus further includes a bush that is inserted into the depression to be disposed between the nozzle and the mold and coupled to the mold, and includes a gate provided to communicate with the outlet. According to paragraph 2,
The second union is located between the first union and the bush so that the nozzle and the first union do not contact the bush. According to paragraph 2,
An injection molding device in which the bush is provided to be detachable from the mold. According to paragraph 1,
The second union includes an upper support surface supporting the first union and an outer support wall supported on the inner wall of the mold forming the depression. According to clause 5,
The outer support wall includes a lower support surface supported on the bottom of the depression, and a side support surface extending from the lower support surface to be supported on the side wall of the depression. According to paragraph 2,
The depression includes a first depression provided between the nozzle and the bush and a second depression provided between the nozzle and the mold,
The second union is an injection molding device arranged to partition the first depression and the second depression. According to paragraph 1,
The second union is formed on the outer periphery of the first union and is disposed so as not to contact the nozzle. According to paragraph 1,
The second union includes a hollow cylindrical shape,
Injection molding apparatus wherein the nozzle is provided to pass through the second union. According to paragraph 3,
The hot runner device further includes a valve pin inserted within the nozzle to be able to be lifted up and down in the longitudinal direction of the nozzle,
An injection molding device wherein one end of the valve pin adjacent to the outlet is provided to be inserted into the outlet and the gate during the lifting process of the valve pin to selectively open and close the outlet and the gate. According to paragraph 1,
The mold is an injection molding device including a cooling line provided in a direction parallel to the direction in which the nozzle extends. According to paragraph 1,
An injection molding device in which the hot runner device is provided to be separable from the mold. A manifold including a chamber in which the resin is accommodated and provided to heat the resin;
a hot runner device that communicates with the manifold to receive the molten resin and discharge it into the cavity of the injection molding device; and
a mold including a depression into which the hot runner device is inserted so that the hot runner device is mounted; Including,
The hot runner device,
a hollow nozzle including a resin flow path in communication with the manifold to receive the molten resin and an outlet through which the resin is discharged;
a valve pin inserted within the nozzle to enable elevation in the longitudinal direction of the nozzle;
a heater provided at the nozzle to heat the supplied resin; and
a union coupled to the nozzle and mounted on the mold so that the nozzle is mounted on the mold without contacting the mold; Includes,
The union is,
A first union provided on the outer periphery of the outlet side of the nozzle and
A second union is disposed between the first union and the mold so that the first union is mounted spaced apart from the mold, and is made of an insulating material to block heat from the heater from being conducted from the first union to the mold. Injection molding device including. According to clause 13,
The injection molding apparatus further includes a bush inserted into the depression to be disposed between the nozzle and the mold and coupled to the mold, and including a gate provided to communicate with the outlet,
The second union is located between the first union and the bush so that the nozzle and the first union do not contact the bush. According to clause 14,
An injection molding device in which the bush is provided to be detachable from the mold. According to clause 13,
The second union includes an upper support surface supporting the first union and an outer support wall supported on the inner wall of the mold forming the depression,
The outer support wall includes a lower support surface supported on the bottom of the depression, and a side support surface extending from the lower support surface to be supported on the side wall of the depression. According to clause 14,
The depression includes a first depression provided between the nozzle and the bush and a second depression provided between the nozzle and the mold,
The second union is an injection molding device arranged to partition the first depression and the second depression. According to clause 14,
An injection molding device wherein one end of the valve pin adjacent to the outlet is provided to be inserted into the outlet and the gate during the lifting process of the valve pin to selectively open and close the outlet and the gate. According to clause 13,
The second union includes a hollow cylindrical shape,
Injection molding apparatus wherein the nozzle is provided to pass through the second union. According to clause 13,
An injection molding device in which the hot runner device is provided to be separable from the mold.

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