KR102408586B1 - Molding apparatus and method of injection mold - Google Patents

Abstract

The mold apparatus of one embodiment forms a cavity for molding a product, and includes a core assembly including a movable variable core to expand the space of the cavity, an input device for injecting a material into the cavity, and raising and lowering the variable core a moving member for varying the volume of the cavity, and a processor for controlling an input device and an operation of the moving member, wherein the processor primarily raises the variable core when the input device injects a first material to a first expansion space of the cavity , and when the input device injects the second material into the first expansion space, the variable core may be raised secondarily to provide a second expansion space of the cavity. In addition to this, various embodiments may be possible.

Description

MOLDING APPARATUS AND METHOD OF INJECTION MOLD

Various embodiments disclosed in this document relate to a mold apparatus and an injection mold method.

The mold device is a device that is provided in the core and puts the product into a cavity for molding the product, molds the product, and injects the product. The mold apparatus is advantageous for mass production and is used in various industrial fields, and for example, is widely used in the manufacture of industrial equipment and household goods in addition to automobiles, electronic devices, and communication devices.

The mold device had to separate the molding process in order to form an injection product having a multi-layer structure made of different materials, and there were problems in that productivity was lowered between process movements, work elements were added, and the space occupied by the mold device had to be secured. .

For example, for injection moldings having a multi-layer structure with the top layer of leather or fiber material, the IMG or IMX method had to be used to cut the top layer after molding. Although it was possible to form a multi-layer structure by cutting or manually, there was a limitation in that the process cost and process time increased.

The mold apparatus and the injection mold method of various embodiments of the present document can mold an injection product having a multi-layer structure while expanding the space of the cavity including the variable core, and reduce the process by solving the above problems and reduce the manufacturing cost can reduce

The technical problems to be achieved through the various embodiments disclosed in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned are common knowledge in the technical field to which the invention described in this document belongs from the description below. It will be clearly understood by those who have

The mold apparatus of an embodiment of the present document forms a cavity for molding a product, and includes a core assembly including a movable variable core to expand the space of the cavity, an input device for injecting a material into the cavity, and a variable core; and a moving member for changing the volume of the cavity by lowering it, and a processor for controlling the input device and the moving member, wherein the processor first raises the variable core when the input device inserts the first material to move the first material of the cavity When the first expansion space is provided and the input device inputs the second material into the first expansion space, the variable core may be raised secondarily to provide the second expansion space of the cavity.

In the injection mold method according to an embodiment of the present document, the variable core of the core assembly is first formed by injecting a first material into a cavity inside the core assembly to form a first layer, and forming a first expansion space in the cavity raising the variable core to form a second expansion space in the cavity so that the second layer expands; can

The mold apparatus and the injection mold method according to various embodiments of the present document may mold an injection product having a multi-layer structure while expanding the space of the cavity including the variable core. Therefore, it is possible to omit the transfer process and the additional injection process for forming the multi-layer structure, and it is possible to improve the manufacturing yield and manufacturing cost.

1 is a side view illustrating a mold apparatus according to an embodiment.
2A is a cross-sectional view of a mold apparatus according to an exemplary embodiment.
2B is a cross-sectional view of a mold apparatus according to an exemplary embodiment.
3 is a perspective view of an injection-molded product according to an embodiment.
4A is a diagram illustrating an operation of a mold apparatus according to an exemplary embodiment.
4B is a diagram illustrating an operation of a mold apparatus according to an exemplary embodiment.
4C is a diagram illustrating an operation of a mold apparatus according to an exemplary embodiment.
5 is a cross-sectional view of an injection-molded product according to an embodiment.
6 is a flowchart of an injection mold method according to an embodiment.
7 is a flowchart of an injection mold method according to an exemplary embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same components are assigned the same reference numerals regardless of the reference numerals, and overlapping descriptions thereof will be omitted.

The various embodiments and terms used therein are not intended to limit the technical features described in the present disclosure to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. In the present disclosure, "A or B", "at least one of A and B", "at least one of A or B", "A, B or C", "at least one of A, B and C", and "A , B, or C" each may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as “first”, “second”, or “first” or “second” may be used simply to distinguish the component from other such components, and may refer to components in other aspects (eg, importance or order) is not limited. that one (eg first) component is "coupled" or "connected" to another (eg, second) component with or without the terms "functionally" or "communicatively" When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

The term “module” used in various embodiments may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as, for example, logic, logic block, component, or circuit. . A module may be an integrally formed part or a minimum unit or a part of the part that performs one or more functions. For example, according to an embodiment, the module may be implemented in the form of an application-specific integrated circuit (ASIC).

According to an embodiment, the method according to various embodiments disclosed in the present disclosure may be included and provided in a computer program product. Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or through an application store (eg Play Store™) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly or online between smartphones (eg: smartphones). In the case of online distribution, at least a part of the computer program product may be temporarily stored or temporarily generated in a machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server.

According to various embodiments, each component (eg, a module or a program) of the above-described components may include a singular or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. . According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, omitted, or , or one or more other operations may be added.

1 is a side view showing a mold apparatus 10 according to an embodiment, FIG. 2A is a cross-sectional view of the mold apparatus 10 according to an embodiment, and FIG. 2B is a mold apparatus 10 according to an embodiment. It is a cross section.

1 to 2B , the mold apparatus 10 according to an exemplary embodiment may include a core assembly 100 , an input device 50 , and a moving member 70 .

The mold apparatus 10 according to an embodiment may be a device in which the cavity 30 provided in the core assembly 100 accommodates a product or material before molding, molds a shape, and injects the cavity 30 . For example, the mold apparatus 10 may inject a molten resin into the cavity 30 to harden it, or inject a glass or metal plate and mold the molded product by a press method, a heating method, a rolling method, or a hydroforming method. can do. In one embodiment, the mold apparatus 10 may inject at least one material into the cavity 30 and then apply heat or pressure, or may harden the liquid material to form a three-dimensional shape or a bent region. .

The core assembly 100 of an embodiment may form a cavity 30 for molding a product therein. The core assembly 100 includes a lower core 101 positioned at a lower portion (eg, -Z direction) of the cavity 30 , a side core 105 positioned on a side surface of the cavity 30 (eg, in an X-Y plane direction), and It may include an upper core 102 positioned above the cavity 30 (eg, in the +Z direction). At least a portion of the lower core 101 , the side core 105 , and the upper core 102 may be formed of one body, and may be fixed during the mold process.

The core assembly 100 according to an embodiment may include a variable core 110 . The variable core 110 may be movable to expand the space of the cavity 30 . In an embodiment, the movable member 70 may raise and lower the variable core 110 to change the shape and volume of the cavity 30 .

For example, the variable core 110 may rise (eg, in a + Z direction) or descend (eg, in a -Z direction) by the movement of the movable member 70 , and a portion of the variable core 110 may have a cavity. (30) can be reached. However, in describing the movement of the variable core 110, the expressions of 'rising' and 'down' represent the movement and return of the variable core 110 in one direction of the mold apparatus 10 for convenience of explanation. That is, the actual implementation is not limited thereto, and in a three-dimensional three-dimensional structure, the operation of expanding the cavity 30 away from the cavity 30 is 'raised', and the cavity 30 is reduced as it approaches from the cavity 30. This action can be expressed as 'descent'. For example, the variable core 110 may 'rise in the lower core direction (eg - Z direction) or descend (eg + Z direction)' or 'rise in the lateral core direction (eg, one direction in the X-Y plane). Or descending (eg, in the other direction of the X-Y plane)', it is not limited thereto, and may include various cases of expanding the space of the cavity 30 .

In one embodiment, the variable core 110 has a structure that selectively moves in one direction, or the shape of the variable core 110 changes or the variable core 110 expands or contracts and the area of the cavity 30 is variable. The core 110 may be expanded or contracted by movement, and even in this case, the operation of expanding the cavity 30 with respect to the cavity 30 is 'rising', and the operation of reducing the cavity 30 is 'falling'. can be expressed as

In an embodiment, the moving member 70 may move in one direction (eg, +/- Y direction) from the core assembly 100 . For example, the moving member 70 may include a lifting member 75 that includes an elastic material to push the variable core 110 in one direction (eg, the +Z direction), and the moving member 70 may include The hydraulic cylinder 73 may be included, and the variable core 110 may be raised to a preset height by adjusting the hydraulic pressure.

For example, as shown in FIG. 2B , in a state in which the movable member 70 is fixed inside the core assembly 100 , the movable member 70 supports the upper surface of the variable core 110 to support the variable core 110 . ) can be supported so that it does not rise by the lifting member 75 .

In one embodiment, when the movable member 70 moves primarily in the outer direction (eg, -Y direction) of the core assembly 100 by a predetermined value, the variable core 110 is bonded to the movable member 70 . The surface rises, and the variable core 110 may be pushed by the lifting member 75 to primarily rise by a predetermined first height. In the cavity 30 , a first expansion space 31 corresponding to the first height at which the variable core 110 rises may be formed.

In one embodiment, when the moving member 70 is secondarily moved by a predetermined value in the outer direction (eg, -Y direction) of the core assembly 100 , the moving member 70 is spaced apart from the variable core 110 . and the variable core 110 may be pushed by the lifting member 75 to rise secondarily by a preset second height. In the cavity 30 , a second expansion space 32 corresponding to the second height at which the variable core 110 rises may be formed. In one embodiment, the core assembly 100 may include an impact prevention jaw 113 for alleviating the impact caused by the rise of the variable core 110 .

In an embodiment, the space expansion operation of the cavity 30 by the variable core 110 of the movable member 70 is not limited thereto, and may be implemented in various ways. For example, the movable member 70 may move the variable core 110 by raising or lowering the impact prevention jaw 113 , or, in the movable member 70 , the lifting member 75 includes a hydraulic cylinder. Thus, it is possible to move the variable core 110 by a preset height.

In an embodiment, the injection device 50 may inject a substance into the cavity 30 . The material may be a liquid resin or a soft material in a molten state, and may be injected into the cavity 30 to be cured and molded. In an embodiment, the input device 50 may include a first input device 51 , and the first input device 51 may inject a first material into the cavity 30 .

In an embodiment, the input device 50 may inject the first material, the second material, and the third material into the cavity 30 through the first input device 51 , or the input device 50 may It may include a first input device 51 for introducing a first material and a second input device 52 for introducing a second material and/or a third material. In an embodiment, the first input device 51 and the second input device 52 may be implemented as one input device 50 and may be divided into two or more flow paths or nozzles for injecting different substances, or , can be implemented independently with each input device 50 . A material and an input method inputted by the input device 50 according to various embodiments will be described in detail with reference to FIG. 4 .

In an embodiment, the processor may control operations of the moving member 70 and the input device 50 . For example, when the input device 50 inputs the first material, the processor first raises the variable core 110 to provide the first expansion space 31 of the cavity 30, and the input device 50 When the second material is injected into the first expansion space 31 , the variable core 110 is raised secondarily to provide the second expansion space 32 of the cavity 30 .

The mold apparatus 10 according to an exemplary embodiment may include a processor that controls driving of the mold apparatus 10 . The processor may be implemented as software including one or more instructions stored in a machine-readable storage medium. For example, the processor of the mold apparatus 10 may call at least one of the one or more instructions stored from the storage medium and execute it. Through this, it is possible that the mold apparatus 10 is operated to perform at least one function according to the called at least one command. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term is different from the case where data is semi-permanently stored in the storage medium. It does not distinguish between temporary storage cases.

3 is a perspective view of an injection-molded product according to an embodiment.

Referring to FIG. 3 , an injection-molded product according to an exemplary embodiment may have a multi-layer structure.

In an embodiment, the injection-molded product may include a first layer 210 that is a core that determines the shape and structure of the injection-molded product, and a second layer 220 that is an outer skin of the injection-molded product. In an embodiment, the first layer 210 and the second layer 220 may be made of different materials depending on the purpose of the injection-molded product, for example, the injection-molded product may be used in a finished product such as an automobile, an electronic device, or a home appliance. In the case of one component, the first layer 210 may be disposed inside the finished product in combination with other components, and the second layer 220 may be disposed outside the finished product to be in contact with a user or an external element. In an embodiment, the first layer 210 and the second layer 220 may be made of different materials depending on the use of the injection-molded product and the type of the finished product.

The first layer 210 according to an embodiment may be made of a material having rigidity, and may be made of a material having durability so as not to be damaged by impact. The first material constituting the first layer 210 may include a thermoplastic resin, for example, the thermoplastic resin may be polyethylene, polyvinyl chloride, nylon, polyacetal resin, polyamide, polystyrene, ABS resin, or acrylic resin. It may include at least one of resins. In an embodiment, the first material may include at least one of polypropylene (PP) and polylactic acid (PLA).

The second layer 220 of an embodiment may be a region that the user touches or comes into contact with the skin to use the finished product, or the second layer 220 may be a region that is exposed to the outside of the finished product and protects internal components. . For example, the uppermost layer constituting the outer shell of the second layer 220 may be made of the second material, and the second material may be made of a synthetic material including rubber or natural fibers or an eco-friendly material. In various embodiments, the outer surface of the second layer 220 of the injection-molded product may be treated by bonding alkylammonium to cellulose to form a hydrophobic surface and improve durability.

In an embodiment, the second layer 220 is made of a second material, and is made of an outer skin layer 210a in contact with the outside of the injection-molded product, and a bonding layer 210b in contact with the first layer 210 and is made of a second material. may include, and the second layer 220 may include an intermediate layer 230 made of a third material that is inserted between the outer skin layer 210a and the bonding layer 210b. In an embodiment, the third material may include an inflatable material, and when the second layer 220 is added, it may expand and expand within the second layer 220 .

In an embodiment, the third material may include at least one of a polymer material having a shore hardness (Hs) of 150 or less based on a shore A value or a foamed plastic of the material, and the second material The material may include at least one of a polymer material having a shore hardness of 200 or less based on a Shore A value. Shore hardness (Hs) is a measure for measuring the hardness of a sample, and specifically, it is a value obtained by dropping a diamond-attached weight from a certain height and measuring the hardness through the recoil height of the weight, and the shore A value is mainly for soft materials , for example, is a value for rubber, plastic, silicone, or polymer compounds.

The Shore A value limiting the material of various embodiments of this document is based on the standard of shore hardness (standard number: KS B 5531) or standard hardness test method (standard number: KS B 5527, KS B 0807) according to KS regulations. It may be a numerical value measured as a reference, and is not limited thereto, and may encompass measurement results in various experimental environments that can be easily implemented by those skilled in the art.

In an embodiment, the third material may include at least one of ethylene vinyl acetate (EVA), ethylene vinylalcohol copolymer (EVOH), or foamed plastic.

4A is a diagram illustrating an operation of the mold apparatus 10 according to an embodiment, FIG. 4B is a diagram illustrating an operation of the mold apparatus 10 according to an embodiment, and FIG. 4C is a diagram illustrating an operation of the mold apparatus 10 according to an embodiment It is a figure which shows the operation|movement of the metal mold|die apparatus 10. As shown in FIG.

4A to 4C , the second input device 52 may simultaneously input the second material and the third material.

In an embodiment, the second input device 52 may include a first nozzle 54 for introducing a second material, a second nozzle 55 for introducing a third material, and an inlet 53 . The first nozzle 54 and the second nozzle 55 may be connected to the inlet 53 to selectively provide the second material and the third material to the inlet 53 . The second input device 52 of an embodiment blocks or opens the connection between the inlet 53 and the first nozzle 54 and the second nozzle 55, and an opening/closing door for opening and closing the inlet 53 is provided. can

As shown in FIG. 4A , the second input device 52 according to an exemplary embodiment may inject a second material onto the first layer 210 to form the second layer 220 . In an embodiment, the first nozzle 54 and the inlet 53 of the second input device 52 may be open, and the second nozzle 55 may be closed. The operation of FIG. 4A is the first step of injecting the second material during the operation (S135) of forming the second layer 220 by injecting the second material and the third material in the injection mold method (S100, see FIG. 7 ). It can be an input action.

As shown in FIG. 4B , the second input device 52 according to an embodiment may simultaneously inject the second material and the third material onto the first layer 210 . In an embodiment, the first nozzle 54 , the second nozzle 55 , and the inlet 53 of the second input device 52 may be opened. In the operation of FIG. 4B, in the injection mold method (S100, see FIG. 7), the second material and the third material are mixed during the operation (S135) of forming the second layer 220 by inputting the second material and the third material. It may be a secondary input operation of simultaneously inputting.

As shown in FIG. 4C , the second input device 52 according to an exemplary embodiment may inject a second material onto the first layer 210 . In one embodiment, the first nozzle 54 and the inlet 53 of the second input device 52 are opened and the second nozzle 55 is closed to put the second material, and when the input is completed, the inlet 53 ) can be closed. The operation of FIG. 4C is the third step of injecting the second material during the operation ( S135 ) of forming the second layer 220 by inputting the second material and the third material in the injection mold method ( S100 , see FIG. 7 ). It may be an input operation.

In an embodiment, the second input device 52 may simultaneously input the second material and the third material in at least some regions, and inject the third material into the second material, and thus the inside of the second layer 220 . An intermediate layer 230 may be formed thereon. After the second layer 220 including the intermediate layer 230 is put into the cavity 30 , the processor (not shown) controls the movable member 70 to raise the variable core 110 secondarily to the second expansion space. Provided (32), the third material can expand and expand in the second expansion space (32). In an embodiment, the third material expands to secure a thickness, and the texture of the second layer 220 may be improved to form a soft and fluffy texture.

In an embodiment, the first to third inputting operations of the second inputting device 52 of FIGS. 4A to 4C may be sequentially performed, and at least some operations may be omitted or may include additional operations.

5 is a cross-sectional view of an injection-molded product according to an embodiment.

Referring to FIG. 5 , the injection-molded product according to an exemplary embodiment may have a layer structure of a first layer 210 , an intermediate layer 230 , and a second layer 220 .

In an embodiment, the second layer 220 may be deposited on the outside of the first layer 210 , and the intermediate layer 230 may be filled between the first layer 210 and the second layer. In one embodiment, the mold device 10 forms the first layer 210 made of the first material, and then raises the variable core 110 first to form the second layer and the intermediate layer 230 as an outer circumferential surface of the first layer. ) is simultaneously added and the variable core 110 is raised secondarily to provide a space in which the third material of the intermediate layer 230 expands, so that an injection product having a triple layer structure can be molded.

In various embodiments, the mold apparatus 10 is adjusted to the expansion direction, volume or shape of the first expansion space 31 and the second expansion space 32 by the movement of the structure of the cavity 30 and the variable core 110 . Accordingly, the layer structure of the injection molded product can be formed in various ways.

For example, when the first expansion space 31 is formed on one surface of the cavity 30 , the second layer 220 may be formed only on a part of the outer surface of the first layer 210 like the injection molding of FIG. 3 . In addition, when the first expansion space 31 is formed on both sides of the cavity 30 , the second layer 220 may be formed on both sides of the first layer 210 as shown in the injection molded product of FIG. 5 .

In an embodiment, the third material is expanded by the second expansion space 32 , and the overall external structure of the injection-molded product may be determined. For example, in the second expansion space 32 , a relatively small space is expanded in the direction of the top and bottom surfaces of the first layer 210 , and a relatively large space is expanded in the lateral direction connecting the top and bottom surfaces of the first layer 210 . In this case, as shown in FIG. 5 , an injection-molded product in which the intermediate layer 230 is expanded in the lateral direction may be formed.

The mold apparatus 10 and the injection mold method of various embodiments of the present document facilitate the structure and shape of the injection-molded product as the first expansion space 31 and the second expansion space 32 are formed by the variable core 110 . It can be molded and injected.

6 is a flowchart of an injection mold method according to an embodiment.

Referring to FIG. 6 , in the injection mold method, a plurality of operations may be performed, or at least some may be independently performed. Hereinafter, in describing the injection mold method, parts overlapping with the above-described description with respect to the components constituting the mold apparatus 10 will be omitted or abbreviated.

In an embodiment, the injection mold method may include an operation ( S110 ) of forming the first layer 210 by injecting a first material into the cavity 30 inside the core assembly 100 . The first material may be in a liquid resin or solid state, and may be molded and cured by the heat or pressure of the cavity 30 to form the core of the injection-molded product.

In one embodiment, the operation ( S120 ) of first raising the variable core 110 of the core assembly 100 to form the first expansion space 31 in the cavity 30 may be included. The movable member 70 can raise the variable core 110 by a predetermined first height, and the cavity 30 forms an expansion space above the first layer 210 to form a single core assembly without a separate transfer operation. (100) It is possible to form an injection molding of a multi-layer structure.

In an embodiment, the operation ( S130 ) of forming the second layer 220 by dosing a second material on the first layer 210 may be included. The second material is in the form of a liquid resin, and the second layer 220 may be formed to correspond to the shapes of the cavity 30 and the first expansion space 31 . The second layer 220 may be a layer constituting the outer surface of the injection-molded product. The second layer 220 may include an expandable material.

In one embodiment, the operation ( S140 ) of raising the variable core 110 secondarily to form the second expansion space 32 in the cavity 30 so that the second layer expands may be included. The movable member 70 may raise the variable core 110 by a predetermined second height, and may provide a space for the second layer 220 to expand. Specifically, the third material having expandability provided in the interior of the second layer 220 , for example, the intermediate layer 230 may expand into the second expansion space 32 , and the mold device 10 may include the first Due to the shapes of the expansion space 31 and the second expansion space 32 , an injection molding having a multi-layer structure may be molded using the cavity 30 of one core assembly 100 .

7 is a flowchart of an injection mold method according to an exemplary embodiment.

Referring to FIG. 7 , the injection mold method according to an exemplary embodiment may include a second material and an operation ( S135 ) of injecting the second material and an operation ( S150 ) of expanding the third material.

In an embodiment, the operation of forming the second layer 220 by injecting a second material on the first layer 210 ( S130 , see FIG. 6 ) may include forming the second material and a third material different from the second material. It may be an operation of simultaneously inputting (S135). In an embodiment, the second material may form the outer skin layer 210a exposed to the outside in the second layer 220 and/or the bonding layer 210b in contact with the first layer 210 , and the third material Silver may include an intumescent material to form the intermediate layer 230 . In an embodiment, the intermediate layer 230 may be formed in the second layer 220 by injecting a third material into the second material. Specifically, the third material may be provided between the outer skin layer 210a made of the second material and the bonding layer 210b made of the second material to form the intermediate layer 230 .

In one embodiment, after the operation (S140) of raising the variable core 110 a second time, an operation (S150) of expanding and expanding the third material in the second expansion space 32 of the cavity 30 may be included. have. In various embodiments, depending on the type of the third material and the mold environment, when the second expansion space 32 is formed, the third material may self-expand, or the temperature of the core assembly 100 may be adjusted, or the second expansion space 32 may be formed. Expansion of the third material may be induced through a subsequent operation added after the formation of the second expansion space 32 , such as an operation of injecting a catalyst into the second layer 220 .

The mold apparatus 10 of various embodiments forms a cavity 30 for molding a product, and a core assembly 100 including a movable variable core 110 to expand the space of the cavity 30, the cavity ( 30) a dosing device 50 for injecting a substance into the inside, a moving member 70 for varying the volume of the cavity 30 by raising and lowering the variable core 110, and the input device 50 and the moving member 70 ) includes a processor (not shown) for controlling the operation, and the processor (not shown) raises the variable core 110 first when the input device 50 inputs the first material to remove the first material of the cavity 30 . When the first expansion space 31 is provided, and the input device 50 puts the second material into the first expansion space 31 , the variable core 110 is raised secondarily to the second expansion space of the cavity 30 ( 32) can be provided.

In various embodiments, the dosing device 50 may include a first inputting device 51 that forms a first layer 210 by putting a first material and a second inputting a second material onto the first layer 210 . A second dosing device 52 forming the layer 220 may be included.

In various embodiments, the second dosing device 52 may simultaneously inject a second material and a third material different from the second material.

In various embodiments, the second input device 52 may input the third material into the second material to form the intermediate layer 230 provided in the second layer 220 .

In various embodiments, the third material may include an expandable material and expand and expand in the second expansion space 32 of the cavity 30 .

In various embodiments, the third material may include at least one of a polymer material having a shore hardness of 150 or less based on a shore A value or a foamed plastic of the material.

In various embodiments, the second material may be formed of a synthetic material including a polymer material having a shore hardness of 200 or less based on a shore A value.

In various embodiments, the first material may include a thermoplastic resin.

In various embodiments, the moving member 70 may include a hydraulic cylinder to raise the variable core 110 to a preset height.

In another various embodiments, the injection mold method ( S100 ) includes an operation ( S110 ) of forming the first layer 210 by injecting a first material into the cavity 30 inside the core assembly 100 ( S110 ), the cavity An operation (S120) of first raising the variable core 110 of the core assembly 100 to form a first expansion space 31 in 30 (S120), a second material is put on the first layer 210 to The operation of forming the second layer 220 (S130), and the operation of raising the variable core 110 secondarily to form the second expansion space 32 in the cavity 30 so that the second layer 220 expands (S130) S140) may be included.

In various embodiments, the operation of forming the second layer 220 by injecting a second material on the first layer 210 ( S130 ) includes simultaneously injecting the second material and a third material different from the second material. It may be operation S135.

In various embodiments, the operation of forming the second layer 220 by injecting a second material on the first layer 210 ( S130 ) may include injecting a third material into the second material to form the second layer. It may be an operation of forming the intermediate layer 230 inside the 220 .

In various embodiments, in the injection mold method ( S100 ), after the second raising of the variable core 110 , the third material expands and expands in the second expansion space 32 of the cavity 30 ( S150 ) ) may be included.

In various embodiments, the operation ( S130 ) of injecting the second material onto the first layer 210 to form the second layer 220 includes the first input operation of injecting the second material, the second material and the second material. It may include a second input operation of simultaneously injecting three substances, and a third input operation of injecting the second substances.

In various embodiments, the operation of raising the variable core 110 first ( S120 ) includes raising the variable core 110 to a predetermined first height and the operation of raising the variable core 110 secondarily ( S130 ). Silver may raise the variable core 110 to a second preset height.

In the above, preferred embodiments have been illustrated and described, but the present disclosure is not limited to the specific embodiments described above, and those of ordinary skill in the art to which the present disclosure pertains without departing from the gist of the claims Various modifications are possible by the present invention, of course, and these modifications should not be individually understood from technical ideas or perspectives.

Claims (15)

a core assembly defining a cavity for forming a product, the core assembly including a variable core movable to expand and contract a space of the cavity;
a dosing device for injecting a substance into the cavity;
a moving member for changing the volume of the cavity by moving the variable core; and
A processor for controlling the operation of the input device and the moving member,
The input device is
a first dosing device for depositing a first material forming the first layer; and
a second dosing device for introducing a second material forming a second layer over the first layer and a third material comprising an intumescent material to form an intermediate layer inside the second layer into the second material;
The processor is
When the first input device injects the first material, the variable core is first raised to a predetermined first height to provide a first expansion space of the cavity for inputting the second material and the third material do,
When the second input device injects the second material and the third material into the first expansion space, the variable core is raised to a second predetermined height so that the third material of the intermediate layer expands and expands. To provide a second expansion space of the cavity for the mold apparatus. delete delete delete delete According to claim 1,
The third material is
A mold device comprising at least one of a polymer material having a shore hardness of 150 or less based on a shore A value or a foamed plastic of the material. According to claim 1,
The second material is
A mold apparatus comprising a polymer material having a shore hardness of 200 or less based on a shore A value. According to claim 1,
The first material is
A mold apparatus comprising a thermoplastic resin. According to claim 1,
The moving member is
A mold apparatus comprising a hydraulic cylinder to raise the variable core to a predetermined height. forming a first layer by introducing a first material into a cavity inside the core assembly;
first raising the variable core to a predetermined first height to form a first expansion space in the cavity;
forming a second layer by injecting a second material on the first layer into the first expansion space and a third material made of an intumescent material to form an intermediate layer inside the second material; and
secondly raising the variable core to a second predetermined height to form a second expansion space in the cavity; and
and the third material of the intermediate layer expands and expands in a second expansion space of the cavity. delete delete delete 11. The method of claim 10,
The operation of forming a second layer by putting a second material on the first layer,
a first input operation of injecting the second material;
a second input operation of simultaneously introducing the second material and the third material; and
and a tertiary input operation of injecting the second material. delete

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