Mold comprising deformable cores

Abstract

A mold for manufacturing a molded product by using a molten material, according to one embodiment of the present disclosure, may comprise: a first core for providing an accommodation space with one open side; a second core at least partially accommodated in the accommodation space, and disposed in the first core so as to be able to linearly move back and forth in a first direction; and a third core which moves in the first direction so as to be coupled to face at least the second core from among the first core and the second core, and which is coupled to the second core so as to form a cavity corresponding to the shape of the molded product to be manufactured. In one embodiment, the second core can provide a first sub-cavity having a first shape corresponding to at least a portion of the cavity when the second core is coupled to the third core and accommodated in the accommodation space, and can provide a second sub-cavity having a second shape that differs from the first shape while the second core deviates from at least a portion of the accommodation space when separated from the third core. Other various embodiments are possible.

Description

Mold containing a deformation core

[0001] Embodiments of the present disclosure relate to a mold, for example, a mold for producing a molded article using molten materials.

[0002] Injection molding is a manufacturing method that manufactures an injection-molded product having a shape corresponding to the molding space by injecting molten resin into a molding space (e.g., a cavity) formed by combining multiple (e.g., two or more) cores. For example, an injection mold may include a molding device including a plurality of cores that are joined together to provide a molding space corresponding to the shape of the injection-molded product, and an injection device that injects molten resin into the molding space. Injection molding using such a mold can be useful for mass production at a relatively low cost. The molding material may be a synthetic resin, and molding using molten metal may be possible.

[0003] A mold can generally form a cavity by joining a pair of cores facing each other (hereinafter referred to as "molding"). When producing injection-molded products of simple shapes, a mold including such a pair of cores can be used. For example, when the shape of the injection-molded product is simple, it may be easy to separate the injection-molded product from the cavity or core(s) after molding. If the injection-molded product has decorations such as engravings or patterns on the surface, or structures such as grooves, protrusions, and / or hooks for fastening to other parts, it may be difficult to separate the injection-molded product from the cavity or core(s) after molding. When molding such injection-molded products of complex shapes, the mold may include a greater number of cores. For example, although the complexity of the process or mold may increase depending on the shape of the injection-molded product, injection molding can provide an environment in which products of various shapes can be produced.

[0004] Injection molding technology can be used not only to manufacture products using synthetic resin, but also to mold injection molded products with embedded components made of different materials (hereinafter referred to as "inserts") through insert injection. For example, by injecting molten resin into a mold with metal components, such as hooks, screws, or fastening bosses, pre-positioned, the metal components can be embedded or embedded within the injection molded product simultaneously with the molding process. Embedding the aforementioned metal components allows the injection molded product to be easily joined to other parts, and depending on the shape and material of the embedded metal components, the injection molded product can be given additional strength or electrical functionality.

[0005] The above information may be provided as background art to aid in understanding the present disclosure. No claim or determination is made as to whether any of the above is applicable as prior art in connection with the present disclosure.

[0006] According to one embodiment of the present disclosure, a mold for manufacturing a molded article using a molten material may include a first core configured to provide a receiving space open on one side, a second core that is at least partially received in the receiving space and is arranged on the first core so as to be linearly reciprocally movable along a first direction, and a third core that is coupled with at least the second core among the first core or the second core by moving along the first direction to face each other, the third core configured to form a cavity corresponding to a shape of a molded article to be manufactured when coupled with the second core. In one embodiment, the second core may be configured to provide a first sub-cavity having a first shape corresponding to at least a portion of the cavity when coupled with the third core and received into the receiving space, and to provide a second sub-cavity having a second shape different from the first shape when separated from the third core while at least partially detaching from the receiving space.

[0007] According to one embodiment of the present disclosure, a mold may include a first core providing a receiving space open on one side, a second core at least partially received in the receiving space and positioned so as to be retractable toward one side of the first core, a pressing member disposed on the first core and configured to press the second core in a direction such that the second core is separated from the receiving space, and a third core configured to face and engage with at least the second core among the first core or the second core by moving in a first direction, the third core being configured to form a cavity corresponding to a shape of a molded article when coupled with the second core. In one embodiment, the second core may be configured to provide a first sub-cavity corresponding to at least a portion of the cavity when received into the receiving space while being coupled with the third core, and to provide a second sub-cavity that is extended beyond the first sub-cavity when separated from the third core while being separated from the receiving space by the pressing member by a specified distance.

[0008] The above-described aspects or other aspects, configurations and / or advantages of one embodiment of the present disclosure may be further clarified by the following detailed description taken in conjunction with the accompanying drawings.

[0009] FIG. 1 is a drawing showing a mold according to one embodiment of the present disclosure.

[0010] FIG. 2 is a drawing showing a first core and a second core of the mold of FIG. 1 according to one embodiment of the present disclosure.

[0011] FIG. 3 is an enlarged view of the first core and the second core of the mold of FIG. 1 according to one embodiment of the present disclosure.

[0012] FIG. 4 is a drawing showing a portion of a second core of the mold of FIG. 1 according to one embodiment of the present disclosure.

[0013] FIG. 5 is a drawing showing another portion of the second core of the mold of FIG. 1 according to one embodiment of the present disclosure.

[0014] FIG. 6 is a drawing showing another portion of the second core of the mold of FIG. 1 according to one embodiment of the present disclosure.

[0015] FIG. 7 is a drawing showing the mold of FIG. 1 in a closed state according to one embodiment of the present disclosure.

[0016] FIG. 8 is a drawing showing a first core and a second core when the mold of FIG. 1 is in a closed state according to one embodiment of the present disclosure.

[0017] FIG. 9 is a drawing showing a first core and a second core of a mold according to one embodiment of the present disclosure, and is a drawing showing a cut along line A-A' of FIG. 8.

[0018] FIG. 10 is a drawing showing the mold of FIG. 1 in an open state according to one embodiment of the present disclosure.

[0019] FIG. 11 is a drawing showing a first core and a second core when the mold of FIG. 1 is in a mold-open state according to one embodiment of the present disclosure.

[0020] FIG. 12 is a drawing showing a first core and a second core of a mold according to one embodiment of the present disclosure, and is a drawing showing a cut along line B-B' of FIG. 11.

[0021] FIG. 13 is a drawing showing a state in which a molded product is positioned on a second core when the mold is in a mold-opening state according to one embodiment of the present disclosure.

[0022] FIG. 14 is a drawing showing an example of a molded article manufactured using a mold according to one embodiment of the present disclosure.

[0023] FIG. 15 is a drawing showing an example of a molded article manufactured using a mold according to one embodiment of the present disclosure.

[0024] FIG. 16 is a drawing showing an example of a molded article manufactured using a mold according to one embodiment of the present disclosure.

[0025] FIG. 17 is a drawing showing a state in which a molded product is positioned on a second core when the mold is in a mold-opening state according to one embodiment of the present disclosure.

[0026] FIG. 18 is a drawing showing an example of a molded article manufactured using the mold of FIG. 17 according to one embodiment of the present disclosure.

[0027] FIG. 19 is a drawing showing an example of a molded article manufactured using the mold of FIG. 17 according to one embodiment of the present disclosure.

[0028] FIG. 20 is a drawing showing an example of a molded article manufactured using the mold of FIG. 17 according to one embodiment of the present disclosure.

[0029] FIG. 21 is a drawing showing the second core and the fourth core when the mold is in a closed state according to one embodiment of the present disclosure.

[0030] FIG. 22 is a drawing showing the second core and the fourth core when the mold is in a closed state according to one embodiment of the present disclosure.

[0031] FIG. 23 is a drawing showing the second core and the fifth core when the mold is in a closed state according to one embodiment of the present disclosure.

[0032] FIG. 24 is a drawing showing an example of a molded article manufactured using a mold according to one embodiment of the present disclosure.

[0033] Throughout the attached drawings, similar reference numbers may be assigned to similar parts, components and / or structures.

[0034] Manufacturing a molded article using a molten material and a mold can be useful for mass-producing products with substantially identical shapes and quality. When the molded article has a complex shape, the mold can combine multiple cores to create a cavity corresponding to the shape of the molded article, while providing an environment in which the molded article can be easily separated from the mold after the molding process. For example, in manufacturing a component such as a housing or case of an electronic device such as a smartphone, the mold can combine multiple cores to provide a cavity corresponding to the shape of the molded article. Here, depending on the external design of the electronic device, two opposing sides of the housing (e.g., the left side and the right side, or the top side and the bottom side) may be symmetrical and curved (or inclined). The complex shape of such a molded article (e.g., the housing) may be determined, for example, in consideration of aesthetic appeal or gripping feel in the external appearance, and this is merely illustrative and the embodiments of the present disclosure are not limited thereto.

[0035] To facilitate removal of such housings using a mold, multiple cores corresponding to a single curved surface may be provided. For example, to create a molded product having inclined or curved surfaces with faces oriented in different directions, the mold may include a larger number of cores. However, when multiple cores are combined to create a single continuous plane or single continuous curved surface, a line-shaped protrusion may be created on the surface. For example, an undesigned protrusion may be created on the surface of the molded product along the boundary between two cores that touch each other during the molding process. When an undesigned protrusion is created, the molded product can be processed into a product of the designed shape (e.g., a housing or case) by removing the undesigned protrusion through an additional process, such as polishing. Such additional processing may increase the cost or time required to manufacture the product.

[0036] One embodiment of the present disclosure is intended to at least resolve the above-described problems and / or disadvantages and provide at least the advantages described below, and can provide a mold including a transformable core that facilitates the molding process and / or separation of a molded article from the core.

[0037] One embodiment of the present disclosure can provide a mold including a deformation core capable of suppressing the creation of undesigned structures.

[0038] One embodiment of the present disclosure can provide a mold including a deformable core that can reduce costs and manufacturing time for post-processing by suppressing the creation of undesigned structures.

[0039] The technical problems to be achieved in this document are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by a person having ordinary skill in the technical field to which the present disclosure belongs from the description below.

[0040] The following description of the accompanying drawings may provide an understanding of various exemplary implementations of the present disclosure, including the claims and their equivalents. While the exemplary embodiments disclosed in the following description include numerous specific details to aid understanding, they are to be considered as one example of various exemplary embodiments. Accordingly, those skilled in the art will appreciate that various modifications and variations of the various implementations described herein may be made without departing from the scope and spirit of the disclosure. Furthermore, descriptions of well-known functions and configurations may be omitted for clarity and conciseness.

[0041] The terms and words used in the following description and claims are not limited to their reference meanings and can be used to clearly and consistently describe one embodiment of the present disclosure. Therefore, it will be apparent to those skilled in the art that the following description of various implementations of the disclosure is provided for illustrative purposes, not for the purpose of limiting the scope of the disclosure and its equivalents.

[0042] Unless the context clearly dictates otherwise, the singular forms of "a," "an," and "the" should be understood to include plural meanings. Thus, for example, "a component surface" could be understood to include one or more of the surfaces of the component.

[0043] Electronic devices according to embodiments of the present disclosure may take various forms. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. Electronic devices according to embodiments of the present disclosure are not limited to the aforementioned devices.

[0044] The embodiments of the present disclosure and the terminology used therein are not intended to limit the technical features described in this document to specific embodiments, but should be understood to encompass various modifications, equivalents, or substitutes of the embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of the items, unless the context clearly dictates otherwise. In this document, phrases such as "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 "at least one of A, B, or C" can each include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish the corresponding component from other corresponding components, and do not limit the corresponding components in any other respect (e.g., importance or order). When a component (e.g., a first component) is referred to as being “coupled” or “connected” to another component (e.g., a second component), with or without the terms “functionally” or “communicatively,” it is understood that the component can be connected to the other component directly (e.g., wired), wirelessly, or via a third component.

[0045] FIG. 1 is a drawing showing a mold (100) according to one embodiment of the present disclosure. FIG. 2 is a drawing showing a first core (101) and a second core (102) of the mold (100) of FIG. 1 according to one embodiment of the present disclosure. FIG. 3 is a drawing showing an enlarged view of the first core (101) and the second core (102) of the mold (100) of FIG. 1 according to one embodiment of the present disclosure.

[0046] Referring to FIGS. 1 to 3, a mold (100) according to one embodiment of the present disclosure includes a first core (101), a second core (102), and / or a third core (103), and the second core (102) may be arranged to be reciprocally movable in a first direction (D1) on the first core (101). In one embodiment, the third core (103) may be arranged to be reciprocally movable in the first direction (D1) and may be coupled with at least the second core (102) among the first core (101) and the second core (102). FIG. 1 or FIG. 3 illustrates a state in which the third core (103) is coupled with the second core (102) (and / or the first core (101)), and the state in which the second core (102) and the third core (103) are coupled may be referred to as a 'molding closed state'. In the closed state, the second core (102) and the third core (103) can be combined to implement a molding space, for example, a cavity, into which molten material is injected.

[0047] According to one embodiment, the mold (100) may include a fixed portion (100a) on which a first core (101), a second core (102), and / or a third core (103) are arranged, and a movable portion (100b) that moves the third core (103) relative to the first core (101) and / or the second core (102) while moving in a first direction (D1) with respect to the fixed portion (100a). As will be described later, as the movable portion (100b) moves to the right in FIG. 1, the third core (103) may be coupled with the second core (102) and / or the first core (101), and as the movable portion (100b) moves to the left in FIG. 1, the third core (103) may be gradually moved away from the second core (102) and / or the first core (101). Although not given a reference number, the fixed portion (100a) may include an actuator to move the third core (103) away from the second core (102) and / or the first core (101) while the movable portion (100b) moves to the left. Such an actuator may include a spring, a hydraulic cylinder, and / or a motor.

[0048] According to one embodiment, the fixing member (100a) may include a first plate (e.g., an upper plate) (141), a second plate (e.g., a lower plate) (143), a first base plate (191), and / or at least one heating plate (193). The first base plate (191) may be a structure for arranging or fixing structures of the fixing member (100a) (e.g., the first plate (141), the second plate (143), the heating plate (193)(s), and / or the cores (101, 102, 103)), and the first plate (141) may be fixed on one surface of the first base plate (191). In one embodiment, the first plate (141) may function as a structure for placing or fixing the first core (101) and / or the second core (102), and the second plate (143) may function as a structure for placing or fixing the third core (103). In one embodiment, the second plate (143) may move in a first direction (D1) with respect to the first plate (141), thereby determining the mold-closing state and the mold-opening state. In one embodiment, the heating plate (193) may be placed, for example, between the first plate (141) and the first base plate (191), and / or on the other surface of the first base plate (191).

[0049] According to one embodiment, the heating plate (193)(s) can maintain or control the temperature of the first core (101), the second core (102), and / or the third core (103) during the molding process. For example, while the molten material is injected into the cavity implemented by the combination of the second core (102) and the third core (103), the heating plate (193)(s) can be configured to heat the first core (101), the second core (102), and / or the third core (103) to maintain at least the temperature of the space provided by the cavity within a specified range, and to stop heating or cool the first core (101), the second core (102), and / or the third core (103) after the injection of the molten material is completed. In this way, the heating plate (193)(s) can be utilized to facilitate the injection of the molten material and reduce the time required for manufacturing a molded article.

[0050] According to one embodiment, the fixed portion (100a) may further include guide shafts (145) provided on the first disc (141). In one embodiment, the second disc (143) (e.g., the third core (103)) may move along the first direction (D1) while being guided by the guide shafts (145)(s), for example, away from the second core (102) (and / or the first core (101)) or toward the second core (102). In one embodiment, although not given a reference number, a spring(s) may be provided that surrounds at least a portion of the guide shafts (145)(s), thereby functioning as an actuator that moves the third core (103) away from the second core (102) (and / or the first core (101)).

[0051] According to one embodiment, the movable part (100b) may include a second base plate (195) that reciprocates in a first direction (D1) and push rod(s) (197) extending from the second base plate (195) along the first direction (D1). When the movable part (100b) moves to the right in FIG. 1, the push rod(s) (197) may, for example, move the second disc (143) (e.g., the third core (103)) from a designated position toward the first disc (141) (e.g., the second core (102) and / or the first core (101)). In one embodiment, the push rod (197)(s) may be in constant contact with the second plate (143), and the movable portion (100b) may be moved to the left in FIG. 1 by a distance required to separate the molded article (e.g., the molded article (P) of FIG. 13) from the second core (102). As the movable portion (100b) is moved to the left in FIG. 1, the second plate (143) and / or the third core (103) may be gradually moved away from the first plate (141) (and / or the second core (102)) by the actuator.

[0052] According to one embodiment, the first core (101) is provided on the fixed portion (100a) and may be referred to as a 'top core'. In one embodiment, the first core (101) may be understood to provide or define an open receiving space (111) on one side. For example, the first core (101) may provide a receiving space (111) that receives at least a portion of the second core (102). The second core (102) may perform a reciprocating motion by being received in or leaving the receiving space (111) by moving along the first direction (D1) by the movable portion (100b) and / or the third core (103). For example, the second core (102) may perform a linear reciprocating motion along the first direction (D1) on the first core (101) and / or on the receiving space (111).

[0053] According to one embodiment, the second core (102) may be deformed by interfering with an inner wall surface (e.g., inner wall surface (111a) of FIG. 12) (e.g., a surface defining a portion of the receiving space (111)) of the first core (101) as it reciprocates linearly on the receiving space (111). For example, as the second core (102) gradually enters the receiving space (111), it may be understood that the first core (101) presses or pushes the second core (102). In one embodiment, the inner wall surface of the first core (101) may be provided to be inclined with respect to the first direction (D1). For example, as the second core (102) is gradually received into the receiving space (111), a load applied to the second core (102) by the first core (101) may gradually increase.

[0054] According to one embodiment, the second core (102) may accumulate elasticity or restoring force by being deformed in response to the load generated by the first core (101). The restoring force of the second core (102) may be converted by the inner wall surface (e.g., inclined structure) of the first core (101) to act as a force to detach the second core (102) from the receiving space (111). However, this is an exemplary statement, and the restoring force of the second core (102) may be substantially smaller than the static frictional force between the second core (102) and the first core (101), and in this case, even if the restoring force of the second core (102) acts, the second core (102) may not detach from the receiving space (111).

[0055] According to one embodiment, when placing the second core (102) on the first core (101), the mold (100) (and / or the fixing member (100a)) may include at least one locking bolt (119a) and / or at least one pressing member (119b). The locking bolt (119a) is disposed to penetrate the first core (101) (e.g., the fixing plate (101a)) so as to be slidably movable on the receiving space (111), and may be fastened to the second core (102) to set a section in which the second core (102) makes a linear reciprocating motion. For example, the second core (102) may be arranged on one surface of the first core (101) and may interfere with the first core (101), thereby limiting the range of movement to the right in FIG. 1, and a portion of the locking bolt (119a) may interfere with the other surface of the first core (101), thereby limiting the range of movement of the second core (102) to the left in FIG. 1. In one embodiment, the locking bolt (119a) may reciprocally couple the second core (102) to the first core (101), and may set a gap or distance (e.g., a distance of the size exemplified by 'S' in FIG. 3) at which the second core (102) deviates from the receiving space (111).

[0056] In one embodiment, the pressing member (119b) may be arranged on the first core (101) and configured to pressurize the second core (102). For example, the pressing member (119b) may be arranged between the first core (101) and the second core (102) and may provide an elastic force or a driving force that acts in a direction to detach the second core (102) from the receiving space (111). In one embodiment, the pressing member (119b) may include an elastic body or a driving device such as a spring, a pneumatic cylinder, a hydraulic cylinder, and / or a motor. Even when the elastic force or driving force of the pressing member (119b) is applied, the second core (102) may remain fastened to the first core (101) by the locking bolt (119a). Accordingly, when no external force is applied, the second core (102) can be displaced into the receiving space (111) by a specified interval or a specified distance (S) and protrude toward one side of the first core (101).

[0057] In one embodiment, the height at which the second core (102) protrudes toward one side of the first core (101) may be substantially determined by the locking bolt (119a). For example, the maximum height at which the second core (102) may protrude toward one side of the first core (101) may be the distance, height, and / or gap exemplified by 'S' in FIG. 3. In one embodiment, when an external force is applied, the second core (102) may be accommodated into the accommodation space (111). For example, the movable part (100b) and / or the third core (103) may move along the first direction (D1) to move the second core (102) into the accommodation space (111). Although this may vary depending on the actual manufactured specifications, when accommodated into the accommodation space (111), the second core (102) may not substantially protrude toward one side of the first core (101). For example, a portion of the surface of the second core (102) may be arranged to form a curved surface or a continuous plane that is substantially continuous with one surface of the first core (101). In one embodiment, when accommodated in the accommodation space (111), a portion of the surface of the second core (102) may be positioned lower than one surface of the first core (101) and may be understood to be arranged substantially inside the accommodation space (111).

[0058] In the illustrated embodiment, the first core (101) may be configured to include a fixing plate (101a) disposed on the other surface. The fixing plate (101a) may be disposed or fixed to substantially close the receiving space (111) on the other surface of the first core (101) while providing at least a portion of the other surface of the first core (101). However, the embodiment(s) of the present disclosure are not limited thereto, and the first core (101) may be provided as a substantially single-piece body. In one embodiment, when the first core (101) includes the fixing plate (111a), the locking bolt (119a) and / or the pressing member (119b) may be disposed on the fixing plate (101a).

[0059] The configuration of the second core (102) will be further examined with reference to FIGS. 4 to 6. When explaining the configuration of the second core (102), the configuration of the mold described above may be referred to.

[0060] FIG. 4 is a drawing showing a portion of a second core (102) of the mold (100) of FIG. 1 according to one embodiment of the present disclosure. FIG. 5 is a drawing showing another portion of a second core (102) of the mold (100) of FIG. 1 according to one embodiment of the present disclosure. FIG. 6 is a drawing showing another portion of a second core (102) of the mold (101) of FIG. 1 according to one embodiment of the present disclosure.

[0061] Referring further to FIGS. 4 to 6, the second core (102) provides a space (e.g., a sub-cavity (121)) corresponding to at least a portion of the shape of a molded article to be manufactured (e.g., a molded article (P) of FIG. 13), and may be deformed as it is received into or removed from the receiving space (111). For example, when received in the receiving space (111), the second core (102) may be pressed by an inner wall surface of the first core (101) (e.g., a portion of a surface surrounding the receiving space (111)), so that the sub-cavity (121) may gradually become smaller. In the embodiment described below, the sub-cavity (121) when the second core (102) is completely accommodated in the accommodation space (111) may be referred to as a 'first sub-cavity (e.g., the first sub-cavity (221a) of FIG. 9)', and the sub-cavity (121) when the second core (102) is sufficiently separated from the accommodation space (111) may be referred to as a 'second sub-cavity (e.g., the second sub-cavity (221b) of FIG. 12)'. Here, 'when the second core (102) is sufficiently separated from the accommodation space (111)' may refer to a state in which the second core (102) does not substantially interfere with the first core (101). The first sub-cavity (221a) and the second sub-cavity (221b) mentioned above are for distinguishing the sub-cavities (121) according to the shape of the second core (102), and it should be noted that such mention does not limit the embodiment(s) of the present disclosure. In one embodiment, the second sub-cavity (221b) may refer to a state or shape that provides a larger space than the first sub-cavity (221a). For example, when the second core (102) is received into the receiving space (111), it has a shape that implements the first sub-cavity (221a), and when it is separated from the receiving space (111), the second core (102) may implement the second sub-cavity (221b) that provides a larger space than the first sub-cavity (221a).

[0062] In one embodiment, the first core (101) may have a hardness that is approximately 8 to 12 higher than that of the second core (102) in terms of Rockwell Hardness on the C scale. The Rockwell Hardness on the C scale may be referred to as 'HrC', and may be one of the methods of measuring the hardness by pressing an indenter into a sample surface with a constant load and measuring the depth of the tip of the indenter. For example, the HrC may be measured using a diamond indenter with a cone of 120 degrees and a tip radius of 0.2 mm. In the production of a molded article using a molten material, this difference in hardness between the first core (101) and the second core (102) may allow repeated deformation / restoration of the second core (102) while maintaining the structural stability of the first core (101) and the second core (102).

[0063] According to one embodiment, in order to suppress adhesion between the first core (101) and the second core (102) due to wear occurring during the receiving operation into or leaving the receiving space (111), or due to heat and pressure during the molding process, the mold (100) and / or the fixing member (100a) may further include a lubricating coating layer (129). The lubricating coating layer (129) may be provided in an area that is in direct contact between the first core (101) and the second core (102), such as an outer surface of the second core (102) or an inner wall surface of the first core (101). The lubricating coating layer (129) may be formed by injecting a carbon-containing gas into a vacuum space and generating plasma to deposit a coating film on the surface of the first core (101) and / or the second core (102). This lubricating coating layer (129) has a heat resistance that can be maintained even at the temperature during the molding process, and can reduce frictional force during the operation of the second core (102) being received into or removed from the receiving space (111).

[0064] In one embodiment, the second core (102) may provide or define at least a portion of the sub-cavity (121) by including a base portion (102a) and / or a side wall structure (123). In one embodiment, as mentioned above, as the second core (102) is received into the receiving space (111) and / or as it moves out of the receiving space (111), the size of the space provided by the sub-cavity (121) is deformed to decrease or increase. In one embodiment, the base portion (102a) may be a plate shape that provides a bottom surface (121a) of the sub-cavity (121), and the side wall structure (123) may have a frame shape that protrudes from an edge of the base portion (102a). For example, the inner wall surfaces (123a, 123b) of the side wall structure (123) may be shaped to substantially surround (define) at least a portion of the sub-cavity (121). In one embodiment, when the third core (103) is combined with the second core (102) (and / or the first core (101)), a portion of the third core (103) may be accommodated in the sub-cavity (121), thereby implementing a cavity having a shape of a desired molded article (e.g., the molded article (P) of FIG. 13). For example, the sub-cavity (121) may provide an area or space corresponding to at least a portion of the shape of the molded article.

[0065] According to one embodiment, the second core (102) may include at least one notch (125) provided in the outer wall surface (123c) of the side wall structure (123). In one embodiment, when the side wall structure (123) has a generally rectangular frame shape, the side wall structure (123) may include a plurality (e.g., four) notches (125). For example, the side wall structure (123) may include notches (125) respectively provided at corner portions formed by two sides meeting. In one embodiment, when the side wall structure (123) has a first thickness (T1) between the inner wall surface (123a, 123b) and the outer wall surface (123c) at a position where the notch (125)(s) is formed, the side wall structure (123) may have a second thickness (T2) greater than the first thickness (T1) in an area where the notch (125)(s) is not formed. For example, when the second core (102) is deformed, the deformation of the side wall structure (123) may be smoother in the area where the notches (125) are formed than when the notches (125) are formed. For example, by providing the notch (125) in at least one of the corner portions (s) of the side wall structure (123), the second core (102) may be smoothly deformed into the designed shape in the operation of being received into or leaving the receiving space (111). The actual values ​​of the first thickness (T1) and the second thickness (T2) may be appropriately selected according to the specifications of the mold to be actually manufactured (e.g., the mold (100) of FIG. 1).

[0066] According to one embodiment, the second core (102) may further include dummy recesses (125a) formed on a surface (e.g., an outer wall surface (123c) of the side wall structure (123) or a surface of the base portion (102a)). The dummy recesses (125a) may be provided, for example, at portions of the second core (102) to be deformed, thereby inducing or promoting deformation of the second core (102) into a designated shape. In one embodiment, the dummy recesses (125a) may be provided adjacent to a position where a notch (125) is formed. In one embodiment, the dummy recesses (125a) may be understood to be implemented as one of the above-described notches (125).

[0067] According to one embodiment, the second core (102) may further include a plurality of grooves (127) provided on a surface (e.g., an outer wall surface (123c) of the side wall structure (123)) that is in direct contact with the first core (101). By providing the plurality of grooves (127) on the surface of the second core (102), an area in direct contact with the first core (101) may be reduced. For example, by providing the plurality of grooves (127) on the surface of the second core (102), a frictional force generated when the second core (102) is received into or removed from the receiving space (111) may be reduced. In one embodiment, the second core (102) may include at least one of the grooves (127) and / or the lubricating coating layer (129) described above, thereby suppressing adhesion or an increase in frictional force with the first core (101).

[0068] FIG. 7 is a drawing showing a state in which the mold (100) of FIG. 1 is in a closed state according to one embodiment of the present disclosure. FIG. 8 is a drawing showing a first core (101) and a second core (102) of the mold (100) of FIG. 1 when the mold (100) of FIG. 1 is in a closed state according to one embodiment of the present disclosure. FIG. 9 is a drawing showing a state in which the first core (101) and the second core (102) of the mold (100) are cut along the line A-A' of FIG. 8 according to one embodiment of the present disclosure.

[0069] Referring to FIGS. 7 to 9, when in a closed state, for example, when the movable part (100b) moves in the first direction (D1) (e.g., the right side of FIG. 1) so that the third core (103) is coupled with the second core (102), the second core (102) is substantially accommodated in the first core (101) (e.g., the accommodation space (111) of FIG. 2), and a portion of the surface of the second core (102) may be arranged on a plane (or a continuous curved surface) that is substantially continuous with one surface of the first core (101). As it is accommodated in the accommodation space (111), a portion of the second core (102) (e.g., the side wall structure (123)) may be deformed inward, so that the sub-cavity (121) may be implemented as a first sub-cavity (221a). For example, as it is received into the receiving space (111), the inner wall surface of the first core (101) can pressurize the outer wall surface (123c) of the side wall structure (123) to move or deform. At this time, the locking bolt (119a) can move to the left along the first direction (D1) by a designated interval or a designated distance (S) as illustrated in FIG. 3 when no external force is applied (e.g., in a mold opening state) while protruding from the other surface of the first core (101). The first sub-cavity (221a) provides, for example, a smaller space than when no external force is applied to the second core (102), and can provide a shape corresponding to at least a portion of a shape of a molded article to be substantially manufactured (e.g., a molded article (P) of FIG. 13).

[0070] FIG. 10 is a drawing showing a state in which the mold (100) of FIG. 1 is in a mold-opened state according to one embodiment of the present disclosure. FIG. 11 is a drawing showing a first core (101) and a second core (102) of the mold (100) of FIG. 1 when the mold (100) of FIG. 1 is in a mold-opened state according to one embodiment of the present disclosure. FIG. 12 is a drawing showing a state in which the first core (101) and the second core (102) of the mold (100) are cut along the line B-B' of FIG. 11 according to one embodiment of the present disclosure.

[0071] Referring to FIGS. 10 and 11, when in the mold opening state, for example, when the movable part (100b) moves in the first direction (D1) (e.g., the left side of FIG. 1) so that the third core (103) is separated from the second core (102), the restoring force of the pressing member (119b) (e.g., the pressing member (119b) of FIG. 2 or 3) and / or the second core (102) can cause the second core (102) to be disengaged from the receiving space (111). When the second core (102) is disengaged from the receiving space (111) by a specified distance (e.g., the distance (S) of FIG. 3) under the guidance of the locking bolt (119a), the second core (102) can at least partially protrude from one surface of the first core (101). In one embodiment, the distance by which the second core (102) deviates from the receiving space (111), or the height by which it protrudes from one surface of the first core (101), may be, for example, less than or substantially equal to the specified distance (S) of FIG. 3. As it deviates from the receiving space (111), the second core (102) may be deformed into a shape that provides a second sub-cavity (221b) that provides a larger space than the first sub-cavity (221a). For example, since there is no external force or structure pressing the outer wall surface (123c) of the side wall structure (123a), the second core (102) may be restored to a shape that provides a larger space than the molded article to be manufactured (e.g., the molded article (P) of FIG. 13). When the second core (102) is disengaged from the receiving space (111) by the force provided by the pressing member (119b), the locking bolt (119a) can move to the left in the first direction (D1) of FIG. 1 on the first core (101) (e.g., the fixed plate (101a)). In one embodiment, a part of the locking bolt (119a) interferes with the other surface of the first core (101) while the force provided by the pressing member (119b) is still applied, so that the second core (102) can be stopped on the first core (101) while disengaging from the receiving space (111) by a specified distance (S).

[0072] FIG. 13 is a drawing showing a state in which a molded product (P) is positioned on a second core (102) when a mold (e.g., mold (100) of FIG. 1) according to one embodiment of the present disclosure is in a mold-open state.

[0073] According to one embodiment, the surface of the molded article (P) manufactured by injecting a molten material into a mold can be substantially in close contact with the second core (102) and / or the third core (103) in a mold-closed state. For example, after a space formed by combining a portion of the second core (102) (e.g., a sub-cavity (121)) and the third core (103) is filled with the molten material, the molten material hardens, so that the molded article (P) can be manufactured in a state in close contact with the second core (102) and / or the third core (103). When such a molded article (P) includes a surface inclined or convex with respect to the direction in which it is separated from the second core (102), it may be difficult to separate it from the mold (100) while in close contact with the second core (102). For example, in the process of separating the molded article (P) in a state in which it is in close contact with the second core (102), damage such as scratches may occur on the inclined or convex surface.

[0074] Referring to FIG. 13, a mold (100) according to an embodiment(s) of the present disclosure can easily separate the molded product (P) from the core (e.g., the second core (102)) by implementing a sub-cavity (e.g., the sub-cavity (121) of FIG. 2 or the second sub-cavity (221b) of FIG. 12) having a larger size than the molded product (P) when the core (e.g., the second core (102)) is in a mold-open state. In FIG. 13, a first gap indicated as 'G1' illustrates a difference between a state in which the second core (102) is the first sub-cavity (221a) (e.g., implemented in a mold-closed state in a molding process) and a state in which the second sub-cavity (221b) (e.g., implemented in a mold-open state), and the second core (102) of FIG. 13 can illustrate a mold-open state. For example, in the closed state, the second core (102) is in a shape that is substantially in close contact with the molded article (P), and in the open state, it can provide a space expanded by the first gap (G1) compared to the closed state while elastically restoring (e.g., a space implemented by the second sub-cavity (221b) when the sub-cavity (121) of FIG. 2 is deformed). For example, by providing the first gap (G1) between the second core (102) and the molded article (P), the molded article (P) can be easily separated from the second core (102). Even if the first gap (G1) is not provided, separation of the molded article (P) is possible, but when it includes an inclined surface or a convex surface, the defect rate due to scratches or permanent deformation may increase. According to the embodiment(s) of the present disclosure, the mold (100) is configured such that the second core (102) is deformed into a shape that provides an expanded sub-cavity (121) (e.g., the second sub-cavity (221b) of FIG. 12) in a mold-open state, thereby facilitating the removal of the molded product (P) from the mold (100) (e.g., the second core (102)), and the defect rate can be improved.

[0075] FIG. 14 is a drawing showing an example of a molded article (P) manufactured using a mold (e.g., mold (100) of FIG. 1) according to one embodiment of the present disclosure. FIG. 15 is a drawing showing an example of a molded article (P) manufactured using a mold (100) according to one embodiment of the present disclosure. FIG. 16 is a drawing showing an example of a molded article (P) manufactured using a mold (100) according to one embodiment of the present disclosure.

[0076] In FIGS. 14 to 16, the reference line indicated as 'RL' is, for example, an example of a line parallel to the direction in which the molded article (P) is separated from the second core (102), and may illustrate a position where the width of the molded article (P) is greatest in a direction intersecting the reference line (RL). The molded article (P) of FIG. 14 has a shape that includes a side surface (OS1) substantially parallel to the reference line (RL), and may have a constant width when viewed in the cross-sectional view of FIG. 14. In this case, the molded article (P) can be easily separated regardless of deformation of the mold (100) (e.g., the second core (102)), and the molded article can be hardly damaged when separated from the mold (100). In one embodiment, when the second core (102) is deformed to expand the sub-cavity (121) in the molded state, the inner surface of the second core (102) (e.g., the inner wall surface (123a, 123b) of the side wall structure (121) of FIG. 2) may be separated from the surface of the molded article (P), making it easier to separate the molded article (P).

[0077] The molded article (P) of FIG. 15 includes a side surface (OS2) implemented to have the largest width in the middle portion, and a first deviation (C1) may exist between the width of the upper portion (or the lower portion) and the width of the middle portion. For example, the molded article (P) of FIG. 15 may have a shape in which the middle portion of the side surface (OS2) provides a convex surface. In one embodiment, when the second core (102) (e.g., the sub-cavity (121)) is separated in an unexpanded state in a mold-opened state, damage such as a scratch may occur in the middle portion of the side surface (OS2) of the molded article (P). According to one embodiment of the present disclosure, in a mold-closed state, the second core (102) is in close contact with the side surface (OS2) of the molded article (P) of FIG. 15, and in a mold-opened state, the second core (102) may be deformed to form a gap (e.g., the first gap (G1) of FIG. 13) greater than the first deviation (C1). Accordingly, even if there are protruding structures and / or convex curved portions on the surface of the molded product (P), the molded product (P) can be easily separated from the mold and / or the second core.

[0078] The molded article (P) of Fig. 16 may include a side surface (OS3) having a shape whose width gradually increases from the upper portion to the lower portion, and there may be a second deviation (C2) between the width of the upper portion and the width of the lower portion. In this case, the sub-cavity (121) of the second core (102) may have the smallest width at a position corresponding to the upper portion of the molded article (P). Here, the phrase “having the smallest width at a position corresponding to the upper portion of the molded article (P)” may refer to the width of the second core (102) in a closed state and / or the sub-cavity (121) (e.g., the first sub-cavity (221a)) in a closed state. For example, when the sub-cavity (121) does not expand in a mold-opening state, damage to the surface of the molded article (P) or permanent deformation of the molded article (P) may be quite frequent in an operation of separating the molded article (P) from the second core (102). In one embodiment of the present disclosure, the second core (102) extends from the side surface (OS3) of the molded article (P) by a specified distance (e.g., the first distance (G1) of FIG. 13) when in the mold opening state, so that the molded article (P) can be easily separated from the second core (102) substantially without damage. In one embodiment, the first distance (G1) may be greater than the second deviation (C2).

[0079] FIG. 17 is a drawing showing a state in which a molded article (P) is positioned on a second core (102) when a mold (e.g., mold (100) of FIG. 1) according to one embodiment of the present disclosure is in a mold-open state. FIG. 18 is a drawing showing an example of a molded article (P) manufactured using the mold (100) of FIG. 17 according to one embodiment of the present disclosure. FIG. 19 is a drawing showing an example of a molded article (P) manufactured using the mold (100) of FIG. 17 according to one embodiment of the present disclosure. FIG. 20 is a drawing showing an example of a molded article (P) manufactured using the mold (100) of FIG. 17 according to one embodiment of the present disclosure.

[0080] According to one embodiment, as illustrated in FIGS. 18 to 20, the molded article (P) may include functional holes (FH)(s). The functional holes (FH)(s) may be provided as, for example, connector holes, acoustic holes, optical holes, and / or holes for accommodating various buttons when the molded article (P) is utilized as a component such as a housing of an electronic device. According to one embodiment of the present disclosure, as illustrated in FIG. 17, a curved surface (Rp) or an inclined surface may be implemented at the end of the functional hole (FH)(s) by including at least one protrusion (Rm) provided on the inner wall surface of the side wall structure (123) (e.g., the inner wall surfaces 123a and 123b of FIG. 2). The at least one protrusion (Rm) may, for example, have a closed curve shape of a trajectory corresponding to the edge of the functional hole (FH)(s). In one embodiment, at least one projection (Rm) may have a circular, oval, and / or polygonal shape corresponding to the shape of the functional hole (FH)(s) when viewed from the outside of the molded article (P). These functional holes (FH) may be formed during the molding process of the molded article (P) and / or by an additional process after the molding process. When formed by an additional process, at least one projection (Rm) may exemplify the position or size at which the functional holes (FH) are to be formed.

[0081] FIG. 21 is a drawing showing a second core (102) and a fourth core (351) when a mold (e.g., mold (100) of FIG. 1) according to one embodiment of the present disclosure is in a closed state. FIG. 22 is a drawing showing a second core (102) and a fourth core (351) when a mold (100) according to one embodiment of the present disclosure is in a closed state.

[0082] Referring to FIGS. 21 and 22, the mold (100) and / or the fixing member (100a) may further include a fourth core (351)(s) arranged to be slidable along a second direction (D2; D2A, D2B) intersecting the first direction (D1) on the first core (101). When the side wall structure (123) has a rectangular frame shape, four fourth cores (351) may be arranged. For example, the fourth cores (351) may be provided as a structure defining at least a portion of the receiving space (111) of FIG. 2 in a mold-closed state. When four fourth cores (351) are arranged, the fourth cores (351) may be slidable in directions intersecting each other in substantially the same plane. In one embodiment, when in a closed state, the fourth core (351)(s) can support or maintain the second core (102) in a shape that provides a first sub-cavity (e.g., the first sub-cavity (221a) of FIG. 12) by pressing the side wall structure (123). In one embodiment, compared to the preceding embodiment, since the mold (100) further includes the fourth core (351)(s), friction between the first core (101) and the second core (102) can be reduced during an operation of being received into or leaving the receiving space (111).

[0083] In one embodiment, when the third core (103) is coupled with the second core (102), a portion of the fourth core (351) may be disposed within the cavity or the first sub-cavity (221a) by penetrating the side wall structure (123). For example, a portion of the fourth core (351) may be provided as a structure corresponding to a curved surface or an inclined surface (e.g., a curved surface indicated as 'Rp' in FIGS. 18 to 20) of the above-described molded article (P). In one embodiment, a portion of the fourth core (351) may be disposed within the first sub-cavity (221a), thereby functioning as a structure that forms at least a portion of the functional hole (FH)(s) of FIGS. 18 to 20.

[0084] FIG. 23 is a drawing showing a second core (102) and a fifth core (453) when a mold (e.g., mold (100) of FIG. 1) according to one embodiment of the present disclosure is in a closed state. FIG. 24 is a drawing showing an example of a molded article (P) manufactured using a mold (100) according to one embodiment of the present disclosure.

[0085] Referring further to FIGS. 23 and 24, the mold (100) may include fifth cores (453)(s) that are at least partially disposed inside the first sub-cavity (e.g., the first sub-cavity (221a) of FIG. 12) when the mold is in a closed state (e.g., the third core (103) is coupled with the second core (102)) by sliding on the first core (101). The fifth core (453)(s) may be understood as, for example, a portion of the fourth core (351)(s) of FIG. 21 and / or FIG. 23. However, the embodiment(s) of the present disclosure are not limited thereto, and a mold of an embodiment that includes the fifth core (453)(s) without including the fourth core (351)(s) of FIG. 21 may be implemented. The fifth core (435)(s) and / or the fourth core (351)(s) can slide toward or away from the second core (102) (e.g., the side wall structure (123)) by sliding on the first core (101), as previously mentioned. In the closed state, the fifth core (453)(s) and / or the fourth core (351)(s) can slide toward the second core (102) and be disposed at least partially inside the second core (102) (e.g., inside the first sub-cavity (221a)).

[0086] In one embodiment, a molded article (P) may be manufactured by injecting molten material while a portion of the fifth core (453)(s) and / or the fourth core (353)(s) is disposed inside the first sub-cavity (221a). A portion of the fifth core (453)(s) and / or the fourth core (353)(s) disposed inside the first sub-cavity (221a) may function as a structure for forming at least a portion of the functional hole (FH)(s) and / or the curved surface indicated by 'Rp' in FIGS. 18 to 20. In one embodiment, a portion of the fifth core (453)(s) and / or the fourth core (351)(s) disposed inside the first sub-cavity (221a) may function as a structure for forming at least a portion of the functional hole (FH) and / or the seating space indicated by 'Rp' in FIG. 24. The functional hole (FH) of FIG. 24 may function, for example, as a hole for inserting a storage medium and / or as a hole for inserting a tray for transporting a storage medium. In one embodiment, the settling space (Rp) may provide a space for accommodating, for example, a cover member for concealing or closing the functional hole (FH), or for accommodating a head portion of a tray inserted through the functional hole (FH). The functional hole (FH) and / or the settling space (Rp) may be implemented simultaneously with the production of the molded article (P) by substantially arranging a portion of the fifth core (453)(s) and / or the fourth core (351)(s) into the interior of the second core (102) (e.g., the interior of the first sub-cavity (221a)). However, the embodiment(s) of the present disclosure are not limited thereto, and in removing foreign matter (burr) formed on the surface of the molded product during the molding process, or in implementing the molded product in a shape and size that meets the design specifications, at least a portion of the functional hole (FH) and / or the settling space (Rp) may be completed by an additional processing process performed after the molded product (P) is taken out.

[0087] In a structure in which the fourth core (351)(s) and / or the fifth core (453)(s) of FIGS. 22 to 23 are at least partially disposed inside the first sub-cavity (221a), the operation of the fourth core (351)(s) and / or the fifth core (453)(s) entering or separating from the first sub-cavity (221a) can be performed when in a closed state. For example, the fourth core (351)(s) and / or the fifth core (453)(s) may be set to enter the first sub-cavity (221a) after the third core (103) is coupled to the second core (102), and the fourth core (351)(s) and / or the fifth core (453)(s) may be set to first detach from the second core (102) before the third core (103) is separated from the second core (102). For example, the transition between the closed state and the opened state may be substantially performed in a state in which the fourth core (351)(s) and / or the fifth core (453)(s) are separated from the second core (102).

[0088] As described above, the mold according to the embodiment(s) of the present disclosure (e.g., the mold (100) of FIGS. 1, 7, and / or 10) may include a deformation core (e.g., the second core (102) described above (e.g., the second core (102) of FIGS. 1 to 6)), thereby facilitating separation or removal of a molded article including an inclined surface or a convex surface with respect to the separation direction. For example, even if the molded article includes an inclined surface or a convex curved surface, the molded article can be manufactured and separated using a molten material without surface damage, thereby improving the defect rate. In one embodiment, since the number of cores for manufacturing a molded article having such a complex shape can be reduced, equipment costs (e.g., mold manufacturing costs) or manufacturing costs or time for post-processing of the molded article can be reduced.

[0089] The effects that can be obtained from the present disclosure are not limited to the effects mentioned above, and other effects that are not mentioned can be clearly understood by a person having ordinary skill in the art to which the present disclosure pertains from the description of the above-described embodiment(s).

[0090] According to one embodiment of the present disclosure, a mold for manufacturing a molded article using a molten material (e.g., a mold (100) of FIGS. 1, 7, and / or 10) may include a first core (e.g., a first core (101) of FIGS. 1 to 3) configured to provide a receiving space (e.g., a receiving space (111) of FIG. 2) that is open on one side, a second core (e.g., a second core (102) of FIGS. 1 to 6) that is at least partially received in the receiving space and is arranged on the first core so as to be linearly reciprocally movable along a first direction (e.g., a first direction (D1) of FIG. 1), and a third core (e.g., a third core (103) of FIG. 1) that faces and is coupled with at least the second core among the first core or the second core by moving along the first direction, the third core being configured to form a cavity corresponding to a shape of a molded article to be manufactured by combining with the second core. In one embodiment, the second core may be configured to provide a first sub-cavity (e.g., the first sub-cavity (221a) of FIG. 9) of a first shape corresponding to at least a portion of the cavity when received into the receiving space while being coupled with the third core, and to provide a second sub-cavity (e.g., the second sub-cavity (221a) of FIG. 12) of a second shape different from the first shape while being at least partially separated from the receiving space when separated from the third core.

[0091] In one embodiment, the second sub-cavity may be configured to provide a larger space than the first sub-cavity.

[0092] In one embodiment, the mold as described above may further include a pressing member (e.g., pressing member (119b) of FIG. 2 or 3) disposed on the first core. In one embodiment, the pressing member may be configured to press the second core in a direction causing it to depart from the receiving space.

[0093] In one embodiment, the pressurizing member may include at least one of a spring, a pneumatic cylinder, a hydraulic cylinder, or a motor.

[0094] In one embodiment, the mold as described above may further include a locking bolt (e.g., a locking bolt (119a) of FIG. 2 or 3) disposed on the first core. In one embodiment, the locking bolt may be configured to be fastened to the second core to set a gap or distance at which the second core deviates from the receiving space.

[0095] According to one embodiment, the second core may include a plurality of grooves (e.g., grooves (127)(s) of FIG. 5 or FIG. 6) provided on a surface facing the inner wall surface of the first core.

[0096] According to one embodiment, the second core may include a lubricating coating layer (e.g., the lubricating coating layer (129) of FIG. 6) provided on at least a portion of a surface facing the inner wall of the first core.

[0097] According to one embodiment, the second core may further include a base portion (e.g., the base portion (102a) of FIG. 3 or FIG. 5) configured to provide a bottom surface (e.g., the bottom surface (121a) of FIG. 2) of the first sub-cavity or the second sub-cavity), a frame-shaped side wall structure (e.g., the side wall structure (123) of FIGS. 2 to 6) including an inner wall surface protruding from an edge of the base portion and defining at least a portion of the first sub-cavity or the second sub-cavity), and at least one notch (e.g., the notch (125) of FIG. 2 or FIG. 4) provided on an outer wall surface of the side wall structure. In one embodiment, the thickness between the inner wall surface and the outer wall surface of the side wall structure in the area where the notch is formed (e.g., the first thickness (T1) in FIG. 4) may be smaller than the thickness between the inner wall surface and the outer wall surface of the side wall structure in the area where the notch is not formed (e.g., the second thickness (T2) in FIG. 4).

[0098] According to one embodiment, the second core may be configured to be accommodated in or removed from the accommodation space by moving along the first direction. In this case, the outer wall surface of the side wall structure may be provided to be inclined with respect to the first direction.

[0099] In one embodiment, the mold as described above may further include a fourth core (e.g., the fourth core (351) of FIG. 21 or FIG. 22) slidably arranged on the first core. In one embodiment, the third core may be configured to support or hold the second core so that the fourth core presses the sidewall structure to provide the first sub-cavity while being coupled with the second core.

[0100] In one embodiment, when the third core is coupled with the second core, a portion of the fourth core may be configured to penetrate the sidewall structure and be disposed within the cavity or the first sub-cavity.

[0101] According to one embodiment, the second core may further include at least one protrusion formed on the inner wall surface of the side wall structure (e.g., protrusion (Rm) of FIG. 17).

[0102] According to one embodiment of the present disclosure, a mold (e.g., a mold (100) of FIGS. 1, 7 and / or 10) comprises a first core (e.g., a first core (101) of FIGS. 1 to 3) providing an accommodation space open on one side (e.g., an accommodation space (111) of FIG. 2), a second core (e.g., a second core (102) of FIGS. 1 to 6) at least partially accommodated in the accommodation space and positioned retractably toward one side of the first core, a pressing member (e.g., a pressing member (119b) of FIG. 2 or 3) disposed on the first core and configured to press the second core in a direction to cause it to depart from the accommodation space, and a third core (e.g., a third core (103) of FIG. 1) coupled to at least one of the first core or the second core by moving along a first direction (e.g., a first direction (D1) of FIG. 1), wherein the second The third core may be configured to form a cavity corresponding to the shape of the molded article when combined with the core. In one embodiment, the second core may be configured to provide a first sub-cavity (e.g., the first sub-cavity (221a) of FIG. 9) corresponding to at least a portion of the cavity when combined with the third core and received into the receiving space, and to provide a second sub-cavity (e.g., the second sub-cavity (221a) of FIG. 12) that is extended beyond the first sub-cavity while being separated from the third core by the pressing member and being separated from the receiving space by a specified distance.

[0103] In one embodiment, the pressurizing member may include at least one of a spring, a pneumatic cylinder, a hydraulic cylinder, or a motor.

[0104] In one embodiment, the mold as described above may further include a locking bolt (e.g., a locking bolt (119a) of FIG. 2 or 3) disposed on the first core. In one embodiment, the locking bolt may be configured to be fastened to the second core to set a distance at which the second core deviates from the receiving space.

[0105] According to one embodiment, the second core may include a plurality of grooves (e.g., grooves (127)(s) of FIG. 5 or 6) provided on a surface facing the inner wall surface of the first core, and a lubricating coating layer (e.g., lubricating coating layer (129) of FIG. 6) provided on at least a portion of the surface facing the inner wall surface of the receiving space.

[0106] According to one embodiment, the second core may further include a base portion (e.g., a base portion (102a) of FIG. 3 or FIG. 5) providing a bottom surface (e.g., a bottom surface (121a) of FIG. 2) of the first sub-cavity or the second sub-cavity, a frame-shaped side wall structure (e.g., a side wall structure (123) of FIGS. 2 to 6) protruding from an edge of the base portion and providing an inner wall surface surrounding at least a portion of the first sub-cavity or the second sub-cavity, and at least one notch (e.g., a notch (125) of FIG. 2 or FIG. 4) provided on an outer wall surface of the side wall structure. In one embodiment, the thickness between the inner wall surface and the outer wall surface of the side wall structure in the area where the notch is formed (e.g., the first thickness (T1) in FIG. 4) may be smaller than the thickness between the inner wall surface and the outer wall surface of the side wall structure in the area where the notch is not formed (e.g., the second thickness (T2) in FIG. 4).

[0107] According to one embodiment, the second core can be accommodated in or removed from the accommodation space by moving along the first direction. In this case, the outer wall surface of the side wall structure can be provided to be inclined with respect to the first direction.

[0108] In one embodiment, the mold as described above may further include a fourth core (e.g., the fourth core (351) of FIG. 21 or FIG. 22) slidably disposed on the first core. In one embodiment, a portion of the fourth core may penetrate the side wall structure and be disposed inside the cavity or the first sub-cavity while the third core is coupled with the second core.

[0109] According to one embodiment, the second core may further include at least one protrusion formed on the inner wall surface of the side wall structure (e.g., protrusion (Rm) of FIG. 17).

[0110] While this disclosure has been described by way of example and example, it should be understood that the example is intended to be illustrative and not limiting. It will be apparent to those skilled in the art that various changes in form and detail may be made without departing from the overall scope of this disclosure, including the appended claims and their equivalents.

Claims

1. In a mold (100) for producing a molded product using a molten material, A first core (101) configured to provide an open receiving space (111) on one side; A second core (102) that is at least partially accommodated in the above-mentioned accommodation space and is arranged on the first core so as to be able to reciprocate linearly along the first direction (D1); and A third core (103) that is coupled to face at least the second core among the first core or the second core by moving along the first direction, and is configured to form a cavity corresponding to the shape of a molded article to be manufactured by coupling with the second core, The above second core, When combined with the third core and accommodated in the accommodation space, a first sub-cavity (221a) having a first shape corresponding to at least a portion of the cavity is provided, A mold configured to provide a second sub-cavity (221b) of a second shape different from the first shape while being at least partially separated from the receiving space when separated from the third core.

2. A mold in accordance with claim 1, wherein the second sub-cavity is configured to provide a larger space than the first sub-cavity.

3. In any one of paragraphs 1 to 2, It further includes a pressure member (119b) arranged on the first core, A mold in which the pressurizing member is configured to press the second core in a direction causing it to escape from the receiving space.

4. In the third paragraph, the pressurizing member is a mold including at least one of a spring, a pneumatic cylinder, a hydraulic cylinder, or a motor.

5. In any one of paragraphs 3 to 4, Further comprising a locking bolt (119a) arranged on the first core; A mold wherein the locking bolt is configured to be fastened to the second core and to set a gap or distance at which the second core deviates from the receiving space.

6. A mold according to any one of claims 1 to 5, wherein the second core includes a plurality of grooves (127) provided on a surface facing the inner wall surface of the first core.

7. A mold according to any one of claims 1 to 6, wherein the second core includes a lubricating coating layer (129) provided on at least a portion of a surface facing the inner wall of the first core.

8. In any one of clauses 1 to 7, the second core, A base portion (102a) configured to provide a bottom surface (121a) of the first sub-cavity or the second sub-cavity; A frame-shaped side wall structure (123) including an inner wall surface protruding from an edge of the base portion and defining at least a portion of the first sub-cavity or the second sub-cavity; and Further comprising at least one notch (125) provided on the outer wall surface of the side wall structure, A mold in which the thickness (T1) between the inner wall surface and the outer wall surface of the side wall structure in the area where the notch is formed is smaller than the thickness (T2) between the inner wall surface and the outer wall surface of the side wall structure in the area where the notch is not formed.

9. In the 8th paragraph, the second core is configured to be accommodated in or removed from the accommodation space by moving along the first direction, A mold in which the outer wall surface of the above side wall structure is provided to be inclined with respect to the first direction.

10. In any one of paragraphs 8 to 9, It further includes a fourth core (351) that is arranged to be slidable on the first core, A mold configured to support or maintain the second core so that the fourth core provides the first sub-cavity by pressurizing the sidewall structure while the third core is coupled with the second core.

11. A mold configured such that, in the 10th paragraph, when the third core is combined with the second core, a portion of the fourth core penetrates the side wall structure and is placed inside the cavity or the first sub-cavity.

12. A mold according to any one of claims 8 to 11, wherein the second core further includes at least one protrusion (Rm) formed on an inner wall surface of the side wall structure.

13. In any one of paragraphs 1 to 12, the second core, By performing a linear reciprocating motion along the first direction, it is possible to emerge from one side of the first core, A mold configured to provide a second sub-cavity (221b) that is extended more than the first sub-cavity while being separated from the third core by a specified distance from the receiving space by the pressurizing member.

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