mold

Abstract

A mold according to the concept of the present invention includes: a core including a core body and a sliding core seated on the core body and provided to be elevated in a first direction relative to the core body; an ejector for pressing the sliding core in the first direction to separate the molded product from the core, the ejector being arranged on a rear side of the core in the first direction; a driving unit moving to a rear end of the core in the first direction; and a rod moving in the first direction to press the sliding core in the first direction and coupled to the driving unit to be separated from the driving unit, wherein the rod is provided to move further in the first direction than the driving unit.

Description

Technical Field

[0001] The present disclosure relates to a mold having an improved structure for reducing weight. Background Art

[0002] Generally, molds include injection molds for injection molding molded products and press molds for manufacturing products using iron plates. Molds are divided into mobile and fixed types and are manufactured to stably manufacture products.

[0003] Injection molds include general injection molds used to produce plastic products, die-casting molds that produce products by melting metal like plastic, and so on.

[0004] The injection mold is a device installed in an injection molding apparatus for manufacturing a molded product by injecting a raw material melted by the injection molding apparatus into a cavity provided inside the injection mold and hardening the raw material.

[0005] In order to manufacture large-sized molded products, large-sized injection molds are required. However, as the weight of the injection mold increases, when the injection mold is installed in the injection molding equipment, there may be difficulties in transferring and installing the injection mold due to the weight of the injection mold. Summary of the Invention

[0006] Technical issues

[0007] The present disclosure is directed to providing a mold having an improved structure for reducing the overall weight of the mold by omitting a high-weight configuration among configurations constituting the mold.

[0008] The present disclosure is directed to providing a mold having an improved structure for preventing a molded item having at least three sides from being damaged during removal.

[0009] Technical Solution

[0010] A mold includes: a core in which a molded product is formed, the core including a core body and a sliding core, the sliding core being disposed on the core body and being separable from the core body in a first direction relative to the core body; and an ejector for pressing the sliding core in a first direction to separate the molded product formed in the core from the core, wherein the ejector includes a driver and a first rod, the driver being located below the core and being movable in a first direction toward a lower surface of the core or in a direction opposite to the first direction away from the lower surface of the core, the first rod being movable in the first direction to press the sliding core to be separated from the driver or being movable in a direction opposite to the first direction to be coupled to the driver, and the first rod being movable further in the first direction than the driver.

[0011] In addition, the mold may further include a template for supporting the core, wherein the template may include an open space with at least one area open, so that the body is located inside the template, and the driver can be moved in the first direction to the lower surface of the core inside the open space.

[0012] In addition, the mold may further include a molding plate positioned between the core and the template and supporting the core, wherein the molding plate may include a moving hole through which the ejector is movable in the first direction.

[0013] Furthermore, a front end of the moving hole faces the lower surface of the core in the first direction, and a rear end of the moving hole faces the open space in the first direction.

[0014] In addition, the sliding core may include a first sliding core and a second sliding core, the first sliding core is formed on the upper side of the core body in the first direction and is raised in the first direction in the first part of the core body, the second sliding core is formed on the lower side of the core body in the first direction and is raised in the first direction in the second part of the core body, the first rod is connected to or separated from the driver, and the first rod is movable to press the first sliding core in the first direction, the second rod is connected to the driver and is movable to press the second sliding core in the first direction, the first rod can be moved further than the driver in the first direction, and the second rod can be moved in the first direction along which the driver moves.

[0015] In addition, the ejector may further include a coupler for coupling the driver and the first rod or releasing the coupling of the driver and the first rod.

[0016] Furthermore, the coupler may be coupled to the first rod in a second direction orthogonal to the first direction, and detached from the first rod in a direction opposite to the second direction.

[0017] Furthermore, the coupler may include one side coupled with the driver and the other side coupled with or released from the first rod.

[0018] In addition, the ejector may further include an elastic member to connect the driver to one side of the coupler and elastically support the one side of the coupler.

[0019] In addition, the connector may be movable in a second direction between a first position in which the connector is coupled to the first rod and a second position in which the connector is separated from the first rod, and the ejector may further include: a pressing member that presses the connector in a direction opposite to the second direction to move the connector from the first position to the second position.

[0020] Furthermore, the coupler may include an insertion hole through which the pressing member is inserted in a direction opposite to the first direction, and the pressing member may protrude from a lower surface of the core body toward a direction opposite to the first direction.

[0021] In addition, the pressing member may include a pressing portion to press the connector in an opposite direction to the second direction when the pressing member is inserted into the insertion hole, and the pressing member may press the connector while being inserted into the insertion hole when the connector moves in the first direction together with the driver.

[0022] In addition, the pressing portion may be inclined relative to the first direction, and the connector may further include an inclined portion, which is located on the inner circumferential surface of the insertion hole, inclined relative to the first direction, and contacts the pressing portion when the pressing member is inserted into the insertion hole to be pressed by the pressing portion.

[0023] Furthermore, a space may be formed between the first slide core and the first rod in the first direction.

[0024] In addition, the ejector presses the second sliding core in the first stage to move the second sliding core in the first direction by a first distance, the ejector presses the first sliding core and the second sliding core in the second stage to further move the first sliding core and the second sliding core together in the first direction by a second distance, and the ejector presses the first sliding core in the third stage to further move the first sliding core in the first direction by a third distance.

[0025] A mold includes: a core including a core body and a sliding core disposed on the core body and elevated in a first direction relative to the core body; an ejector for pressing the sliding core in the first direction to separate a molded product molded in the core from the core, wherein the ejector includes: a driver located below the core in the first direction and moving to a lower surface of the core in the first direction; a rod coupled to the driver and moving in the first direction to press the sliding core in the first direction; and a coupler including one side coupled to the driver and the other side coupled to or released from the rod, such that the rod is detachably coupled to the driver.

[0026] The sliding core may include a first sliding core and a second sliding core, the first sliding core is raised in the first direction in a first part formed on the upper side of the core body in the first direction, and the second sliding core is raised in the first direction in a second part formed on the lower side of the core body in the first direction; the rod may include a first rod detachably connected to the driver and pressing the first sliding core in the first direction, and a second rod connected to the driver and pressing the second sliding core in the first direction, the first rod can move further than the driver in the first direction, and the second rod can move in the first direction along which the driver moves.

[0027] In the first stage, the ejector presses the second sliding core to move the second sliding core a first distance in the first direction. In the second stage, the ejector presses the first sliding core and the second sliding core to further move the first sliding core and the second sliding core together in the first direction a second distance. In the third stage, the ejector presses the first sliding core to further move the first sliding core a third distance in the first direction.

[0028] The first rod may move a distance obtained by adding the first distance, the second distance, and the third distance, and the driver and the second rod may move a distance obtained by adding the first distance and the second distance.

[0029] A mold includes: a core, including a core body and a sliding core placed on the core body and raised in a first direction relative to the core body; an ejector, moving the sliding core in the first direction; and a template supporting the core, wherein the sliding core includes a first sliding core and a second sliding core, the first sliding core is raised in the first direction in a first part of the core body and is formed on the upper side of the core body in the first direction, the second sliding core is raised in the first direction in the second part of the core body and is formed on the lower side of the core body in the first direction, the ejector includes a driver located inside the template and raised in the first direction, a first rod pressing the first sliding core in the first direction, a second rod pressing the second sliding core in the first direction, and a connector connected to or separated from the first rod in a second direction orthogonal to the first direction to detachably connect the driver to the first rod.

[0030] Beneficial effects

[0031] The present disclosure can reduce the weight of the mold to the greatest extent by omitting the ejector plate constituting the mold and the spacer blocks for forming a space for the ejector plate to perform translational movement.

[0032] The present disclosure may prevent a molded product having at least three sides from being damaged during an extraction operation for extracting the molded product by performing the extraction operation in stages. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic longitudinal cross-sectional view of a mold according to the present disclosure.

[0034] Figure 2 is a schematic cross-sectional view of a movable mold of a mold according to the present disclosure.

[0035] Figure 3 is a perspective view of a molded product molded by a mold according to the present disclosure.

[0036] Figure 4 is a perspective view of an ejector of a mold according to the present disclosure.

[0037] Figure 5 is a bottom view showing a portion of a movable mold of a mold according to the present disclosure.

[0038] Figure 6 is a schematic cross-sectional view of a movable mold after a molding process in a mold according to the present disclosure.

[0039] Figure 7 is a cross-sectional view showing a state at a first stage in an ejection process of a molded product in a mold according to the present disclosure.

[0040] Figure 8 is a cross-sectional view showing a state at a second stage in the ejection process of the molded product in the mold according to the present disclosure.

[0041] Figure 9 is a cross-sectional view showing a state at a third stage in the ejection process of the molded product in the mold according to the present disclosure.

[0042] Figure 10 yes Figure 1 An enlarged view of a portion of .

[0043] Figure 11 is a longitudinal sectional view showing a state at a second stage in an ejection process of a molded product in a portion of a mold according to the present disclosure.

[0044] Figure 12 is a longitudinal sectional view showing a state at a third stage in an ejection process of a molded product in a portion of a mold according to the present disclosure. DETAILED DESCRIPTION

[0045] The embodiments described in this specification and the configurations shown in the drawings are merely preferred embodiments of the present disclosure, and therefore it will be understood that various modified examples that may replace the embodiments described in this specification and the drawings are possible when the present application is filed.

[0046] Furthermore, the same reference numerals or symbols shown in the drawings of this specification represent members or components that perform substantially the same function.

[0047] In addition, the terms used in this specification are only used to describe the embodiments and are not intended to define and / or limit the present disclosure.It will be understood that the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

[0048] It will be understood that when the terms "include", "comprising", "including..." and / or "comprising..." are used in this specification, it indicates the presence of the stated features, graphics, steps, operations, components, members or a combination thereof, but does not preclude the presence or addition of one or more other features, graphics, steps, operations, components, members or a combination thereof.

[0049] It will be understood that although terms including ordinal numbers such as "first," "second," etc. may be used herein to describe various components, these components should not be limited by these terms. These terms are only used to distinguish one component from another.

[0050] For example, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component, without departing from the scope of this disclosure. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0051] Meanwhile, when used in this specification, terms “front,” “rear,” “upper,” “lower,” etc. are defined based on the drawings, and the shapes and positions of corresponding components are not limited by the terms.

[0052] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0053] The mold 1 according to the present disclosure can be installed in an injection molding device (not shown) to injection mold a molded product. In this disclosure, the technical features of the mold 1 are disclosed, and descriptions of the injection molding device (not shown) and the process of injection molding a molded product will be omitted.

[0054] Figure 1 is a schematic longitudinal cross-sectional view of a mold according to the present disclosure. Figure 2 is a schematic cross-sectional view of a movable mold of a mold according to the present disclosure. Figure 3 is a perspective view of a molded product molded by a mold according to the present disclosure.

[0055] like Figures 1 to 3 As shown, the mold 1 according to the present disclosure may include a first mold 10 and a second mold 20 detachably coupled to the first mold 10 and forming a cavity CA having a shape corresponding to a molded product P to be manufactured together with the first mold 10 .

[0056] The second mold 20 can be positioned above the first mold 10 in the first direction A. In addition, the second mold 20 can be fixed. The first direction A can correspond to the up-down direction, but is not limited thereto. However, the first direction A can be set to the front-to-back direction or the left-to-right direction. In addition, hereinafter, the direction toward the first direction A is described as the upward direction, and the direction opposite to the first direction A is described as the downward direction. However, the direction toward the first direction A can be described as the front direction, and the direction opposite to the first direction A can be described as the rear direction.

[0057] The first mold 10 may be coupled to or separated from the second mold 20 according to the up and down movement, but is not limited thereto. However, the first mold 10 may be fixed, and the second mold 20 may be movable up and down.

[0058] The mold 1 may include cores 30 and 40 configured to injection-mold the molded product P. The cores 30 and 40 may include a first core 30 disposed on the first mold 10 and a second core 40 disposed on the second mold 20 and provided to form a cavity CA corresponding to the shape of the molded product P to be manufactured together with the first core 30.

[0059] When the first core 30 moves upward and is coupled with the second core 40 , a cavity CA may be formed, and when the first core 30 moves downward and is separated from the second core 40 , the molded product P manufactured in the cavity CA may be taken out from the mold 1 .

[0060] The molded product P may move downward together with the first mold 10 while being supported by the first core 30 , and then, the molded product P may be separated from the second core 40 covering the upper portion of the molded product P and taken out to the outside, as will be described below.

[0061] During injection molding, when the raw material is injected into the cavity CA, the temperature of the cores 30 and 40 may increase due to the high temperature of the injected raw material, and thus, a cooling process for reducing the increased temperature of the cores 30 and 40 may be required.

[0062] Therefore, the mold 1 can receive a cooling fluid such as water through a cooling device (not shown) to cool the cores 30 and 40 and adjust the solidification rate of the raw material injected into the cavity CA. Each of the first core 30 and the second core 40 may include a cooling flow path through which the cooling fluid supplied from the cooling device (not shown) passes, but is not limited thereto. However, the cooling flow path (not shown) may be formed in either the first core 30 or the second core 40.

[0063] The first mold 10 according to the present disclosure may include a first molding plate 60 for accommodating the first core 30 and a first mold plate 50 on which the first molding plate 60 is mounted.

[0064] The first mold plate 50 may be connected to a conveyor (not shown) for moving the first molding plate 60 accommodating the first core 30 .

[0065] The first core 30 may be supported by the first mold plate 50 and elevated in the first direction A. The first molding plate 60 may be formed by coupling a plurality of unit configurations to each other, but is not limited thereto. However, the first molding plate 60 may be formed as a single configuration.

[0066] The second mold 20 may include a second mold plate 70 and a second mold plate 80, the second core 40 being supported by the second mold plate 80 and being fixed to the second mold plate 70. The second mold plate 70 may support both the second core 40 and the second mold plate 80. The second mold plate 80 may be formed by coupling a plurality of unit structures to each other, but is not limited thereto. However, the second mold plate 80 may be formed as a single structure.

[0067] In addition, the second mold 20 may include a third molding plate 81. The third molding plate 81 may support the second core 40 together with the second molding plate 80.

[0068] The third molding plate 81 may be formed by coupling a plurality of unit structures to each other, but is not limited thereto. However, the third molding plate 81 may be formed as a single structure.

[0069] Hereinafter, only the first core 30 will be described, and for ease of description, the first core 30 will be referred to as the core 30. Also, hereafter, only the first mold plate 50 will be described, and for ease of description, the first mold plate 50 will be referred to as the mold plate 50. Also, hereafter, only the first molding plate 60 will be described, and for ease of description, the first molding plate 60 will be referred to as the molding plate 60.

[0070] The core 30 may include an auxiliary core 30 a for realizing the shape of the molded product P. The auxiliary core 30 a may be formed in a configuration separate from the core 30 , but is not limited thereto. However, the auxiliary core 30 a may be integrated into the core 30 .

[0071] The core 30 may include a sliding core 90 for separating the molded product P hardened in the cavity CA from the core body 31. The sliding core 90 may reciprocate in the first direction A.

[0072] The sliding core 90 may form a portion of the core body 31. The sliding core 90 may be elevated in the first direction A relative to the core body 31.

[0073] When the molded product P is molded in the cavity CA, the sliding core 90 may be seated on the core body 31. The sliding core 90 may move in the first direction A and press the molded product P in the first direction A to separate the molded product P, which is in close contact with the core body 31, from the core 30 after molding of the molded product P is completed.

[0074] In a state where the first mold 10 is separated from the second mold 20 , the sliding core 90 may be used to separate the molded product P. The sliding core 90 may contact the molded product P hardened and manufactured in the cavity CA and press the molded product P to separate the molded product P from the first mold 10 .

[0075] The sliding core 90 according to an embodiment of the present disclosure may include a first sliding core 91 and a second sliding core 92 located at different positions. Details thereof will be described below.

[0076] The mold 1 may include an ejector 100 for moving the sliding core 90 in the first direction A or in a direction opposite to the first direction A.

[0077] The ejector 100 may include a driver 110 and rods 120 and 130, wherein the driver 110 is located below the core 30 (or behind the core 30) in the first direction A and moves to the lower surface 37 (or rear surface) of the core 30 (or core body 31), and the rods 120 and 130 are connected to the main body 110 in the first direction A to press the sliding core 90 in the first direction A.

[0078] The rods 120 and 130 may include a first rod 120 pressing the first sliding core 91 in the first direction A and a second rod 130 pressing the second sliding core 92 in the first direction A. Details regarding this will be described below.

[0079] The first rod 120 may be detachably coupled to the driver 110. The ejector 100 may include a coupler 140 for selectively connecting / disconnecting the first rod 120 from the driver 110. Details regarding this will be described below.

[0080] The inner housing of a refrigerator, the inner housing of a clothing care device, and the like can be provided as a molded product formed from a mold. Typically, due to the large size of the inner housing of a large refrigerator or clothing care device, it is difficult to mold such an inner housing into a single piece. Therefore, such an inner housing is manufactured by injection molding several components of the inner housing and then assembling these components.

[0081] In the case where the inner shell is formed with partitioned structures, additional sealing is required between the structures, and incomplete sealing may cause problems of air or water leaking from the inner shell.

[0082] Furthermore, a separate structure for assembling the partition structures together is required, which may cause a problem of deterioration in assembly.

[0083] In order to prevent this problem, a large-sized mold for molding a large-volume molded product in one piece is necessarily required.

[0084] In particular, in order to mold a molded product having a large inner space, such as an inner case of a refrigerator or an inner case of a clothing care device, it is necessary to use a core having a large volume to mold the inner space.

[0085] As the size of the mold increases, in particular, the moving length of the rod pressing the ejector to remove the molded product from the large core increases, and the length of the mold in the removal direction increases, which further increases the size of the mold.

[0086] That is, in order to form an inner space S (such as Figure 3 The inner space of the molded product P molded by the mold 1 according to the present disclosure shown may require at least three parts P1, P2 and P3 extending in different directions.

[0087] In order to form the molded product P, the core 30 (or the core body 31) may include a first portion 32 and a second portion 33 and a third portion 34, wherein the first portion 32 extends in a second direction B substantially orthogonal to the first direction A, and the second portion 33 and the third portion 34 extend from both ends of the first portion 32 in a third direction C orthogonal to the first direction A and the second direction B in a direction opposite to the first direction A.

[0088] The first portion 32 , the second portion 33 , and the third portion 34 of the core 30 may form the first portion P1 , the second portion P2 , and the third portion P3 of the molded product P, and the first portion P1 , the second portion P2 , and the third portion P3 may form the inner space S.

[0089] As described above, after the molded product P is hardened, the sliding core 90 and the rods 120 and 130 can be moved in the first direction A to remove the molded product P from the core 30. The length that the sliding core 90 and the rods 120 and 130 need to move in the first direction A can be increased by the second portion 33 and the third portion 34 extending substantially in the first direction A to form the interior space S of the molded product P.

[0090] Generally, the mold includes a plurality of rods and an ejector plate for moving the plurality of rods together by fixing the plurality of rods to remove the molded product from the core.

[0091] As the ejector plate reciprocates in the removal direction, a plurality of rods fixed to the ejector plate may move to press the molded product P and remove the molded product from the core.

[0092] The ejector plate can be positioned between the template and the molding plate and reciprocate between the template and the molding plate. In order to form a space for the ejector plate to move between the template and the molding plate so that the ejector plate reciprocates in the removal direction, a spacer block structure can be additionally provided.

[0093] However, the moving length of the rods 120 and 130 may increase when the core 30 is formed at a high position in the removal direction A. In a core of a typical mold, as the moving length of the ejector plate increases, the length of the spacer block also increases to correspond to the moving distance of the ejector plate.

[0094] As a result, the overall size of the mold may increase. This increase in mold size leads to an increase in mold manufacturing costs. However, the biggest problem is that the increased weight of the mold makes it difficult to install the mold in the injection molding equipment, resulting in a deterioration in the moldability of the molded product.

[0095] The mold can be installed in an injection molding device, the first mold or the second mold can be moved by the injection molding device so that the first mold and the second mold are coupled to and separated from each other, and a molded product can be molded in a cavity formed between the first mold and the second mold.

[0096] At this time, the mold can be transferred to the injection molding equipment by the transfer device and installed in the injection molding equipment. However, when the weight of the mold increases due to the increase in the size of the mold, there may be difficulties in transferring the mold and installing the mold in the injection molding equipment.

[0097] Therefore, in the case of forming a mold for molding a molded product P including at least three portions P1 , P2 , and P3 extending in different directions, it may be necessary to minimize the weight of the mold by minimizing the size of the mold.

[0098] To solve this problem, the mold 1 according to one embodiment of the present disclosure may omit the configuration of the ejector plate supporting the rods 120 and 130 that move the sliding core 90 and the configuration of the spacer blocks for ensuring the moving distance of the typical ejector plate.

[0099] The mold 1 may include a driver 110 for moving the sliding core 90 instead of the ejector plate. By minimizing the moving distance of the driver 110 in the first direction A to minimize the overall size of the mold 1 (more specifically, the size of the mold 1 extending in the first direction A), the total weight of the mold 1 can be reduced. Therefore, the mold 1 capable of molding a large molded product P can be easily transferred and installed in an injection molding device (not shown).

[0100] Generally, when the distance the rod needs to move to remove the molded product P is the minimum safety distance l1, the ejector plate needs to move the distance l1 between the molding plate and the template. Therefore, additional spacer blocks need to be provided between the molding plate and the template to ensure the distance l1.

[0101] However, since the distance l2 that the driver 110 of the ejector 100 of the mold 1 according to one embodiment of the present disclosure moves is shorter than the minimum safety distance l1 that the rod 120 needs to move in the first direction A, the mold 1 can have a shorter length in the first direction A than a typical mold, thereby reducing the total weight of the mold 1. Figures 7 to 9 The technical feature of the driver 100 is described as having a minimum safety distance shorter than the ejection plate.

[0102] Hereinafter, the ejector 100 of the mold 1 according to one embodiment of the present disclosure will be described in detail.

[0103] Figure 4 is a perspective view of an ejector of a mold according to the present disclosure. Figure 5 is a bottom view showing a portion of a movable mold of a mold according to the present disclosure. Figure 6 is a schematic cross-sectional view of a movable mold after a molding process in a mold according to the present disclosure.

[0104] like Figures 4 to 6 As shown, the ejector 100 may include a driver 110 and rods 120 and 130, wherein the driver 110 is located below the core 30 in the first direction A and moves to the lower end of the core 30, and the rods 120 and 130 are coupled to the driver 110 in the first direction A to press the sliding core 90 in the first direction A.

[0105] The rods 120 and 130 may include a first rod 120 pressing the first sliding core 91 in the first direction A and a second rod 130 pressing the second sliding core 92 in the first direction A.

[0106] The first sliding core 91 may be located on the uppermost portion of the core body 31 in the first direction A to press the first portion P1 of the molded product P molded on the first portion 32 of the core 30 in the first direction A.

[0107] The first sliding core 91 may form a portion of the first portion 32. That is, a portion of the core 30 or a portion of the core body 31 may be formed by the first sliding core 91. The first sliding core 91 may form a portion of the upper end of the core 30 in the first direction A.

[0108] A pair of second sliding cores 92 may be provided. The second sliding cores 92 may press the second portion P2 and the third portion P3 of the molded product P, which are molded on the second portion 33 and the third portion 34 of the core 30, in the first direction A.

[0109] The pair of second sliding cores 92 according to an embodiment of the present disclosure may be located at heights corresponding to each other in the first direction A. This may be because the lower ends of the second portion P2 and the third portion P3 of the molded product P are formed at heights corresponding to each other with respect to the first direction A, but is not limited thereto.

[0110] However, in the case where the lower ends of the second and third portions P2 and P3 of the molded product P are formed at different heights in the first direction A, the second slide core 92 may be formed at different heights relative to the first direction A.

[0111] Since the pair of second slide cores 92 are driven in the same manner, one second slide core 92 of the pair of second slide cores 92 will be described below.

[0112] The first rod 120 may press the lower end 91 b of the first sliding core 91 to move the first sliding core 91 in the first direction A.

[0113] The upper end 121 of the first rod 120 may face the lower end 91b of the first sliding core 91. A lower portion of the first rod 120 may be coupled with the driver 110.

[0114] The first rod 120 may be coupled to the driver 110 in a detachable manner from the driver 110. Details regarding this will be described below.

[0115] The first rod 120 may be inserted into a rod through-hole 35 formed inside the core body 31 . An upper end 121 of the first rod 120 may pass through the rod through-hole 35 and extend to a lower end 91 b of the first sliding core 91 .

[0116] The first rod 120 may move a preset distance in the first direction A together with the driver 110 to press the first sliding core 91 in the first direction A. As shown in FIG.

[0117] The second rod 130 may press the lower end of the second sliding core 92 to move the second sliding core 92 in the first direction A.

[0118] The upper end 131 of the second rod 130 may be in contact with the lower end of the second sliding core 92. Therefore, the second sliding core 92 may move the same distance as the distance the second rod 130 moves.

[0119] The lower end 132 of the second rod 130 may be connected to the driver 110. Unlike the first rod 120, the lower end 132 of the second rod 130 may be coupled to the driver 110 without being separated therefrom.

[0120] The second rod 130 may be inserted into the space formed between the core body 31 and the molding plate 60, but is not limited thereto. However, the second rod 130 may be inserted into a rod through hole formed inside the core body 31 like the first rod 120, or into a rod through hole formed in the molding plate 60.

[0121] The second rod 130 may move a preset distance in the first direction A together with the driver 110 to press the second sliding core 92 in the first direction A.

[0122] The driver 110 , which is a member that fixes the first rod 120 and the second rod 130 , may function similarly to an ejector plate of a typical mold.

[0123] The driver 110 may include a first hole 111 into which the first rod 120 is inserted and fixed. A lower end of the first rod 120 may be inserted into the first hole 111 and fixed to a coupler 140 to be described below, thereby being coupled with the driver 110.

[0124] The driver 110 may include a second hole 112 into which a pressing member 38 described below is inserted. When the driver 110 moves in the first direction A, the second hole 112 may guide the pressing member 38 on the lower end of the core 30 to be inserted into the coupler 140 .

[0125] The driver 110 may include a third hole 113 into which a guide rod 39 for guiding movement of the driver 110 is inserted. The guide rod 39 may extend from the lower surface 37 of the core body 31 in a direction opposite to the first direction A, and the driver 110 may reciprocate in the first direction A in a state in which the guide rod 39 is inserted into the third hole 113.

[0126] The template 50 may include an open space 51 at least one area of which is open so that the driver 110 is located within the template 50. The driver 110 may be located within the open space 51.

[0127] The driver 110 may move from the open space 51 to the lower surface 37 of the core body 31 (the lower surface of the core body 31 in the first direction A).

[0128] In a typical mold, an ejector plate may be positioned between the molding plate and the template to increase the length between the molding plate and the template in the first direction A. However, the driver 110 according to an embodiment of the present disclosure may be positioned inside the template 50 , and thus, there may be no additional length of the mold 1 extending in the first direction A between the molding plate 60 and the template 50 , which reduces the overall weight of the mold 1 .

[0129] The open space 51 may communicate with the outside in the first direction A. Therefore, the lower surface 110 b of the driver 110 may be exposed to the outside of the template 50 in the opposite direction of the first direction A.

[0130] Therefore, the lower end 122 of the first rod 120 inserted into the first hole 111 may also be exposed to the outside of the template 50 in the opposite direction to the first direction A.

[0131] The molding plate 60 may include a moving hole 61 through which the ejector 100 moves in the first direction A inside the molding plate 60 .

[0132] Inside the moving hole 61 , the driver 110 , the first rod 120 , and the second rod 130 may move together in the first direction A. The moving hole 61 may extend in the first direction A by a minimum length by which the body 110 needs to move.

[0133] The movement hole 61 may include a front end facing the lower surface 37 of the core body 31 and a rear end facing the open space 51 in the first direction A. The open space 51 and the movement hole 61 may be positioned at positions corresponding to each other in the first direction A.

[0134] Therefore, the driver 110 located in the open space 51 may move in the first direction A from the open space 51 to the moving hole 61 and to the lower surface 37 of the core body 31 .

[0135] In a typical mold, the ejector plate may be located between the molding plate and the template, thus increasing the length between the molding plate and the template in the first direction. However, the actuator 110 according to one embodiment of the present disclosure can move within the movable hole 61 formed within the molding plate 60. Therefore, there is no additional length of the mold 1 extending in the first direction A between the molding plate 60 and the template 50, which reduces the overall weight of the mold 1.

[0136] That is, because the actuator 110 corresponding to a typical ejector plate can move in the first direction A within the template 50 and the molding plate 60, the spacer blocks typically located between the template and the molding plate can be eliminated. Therefore, the length of the spacer blocks that would otherwise extend in the first direction A can be reduced, which reduces the overall weight of the mold 1.

[0137] The first rod 120 may extend further than the second rod 130 in the first direction A. This may be because the second sliding core 92 is located at a lower height in the first direction A than the first sliding core 91 .

[0138] The second sliding core 92 can press the lower ends of the second portion P2 and the third portion P3 of the molded product P. Because the lower ends of the second portion P2 and the third portion P3 are located lower than the first portion P1 of the molded product P in the first direction A, the second sliding core 92 can be closer to the driver 110 in the first direction A than the first sliding core 91.

[0139] During the process of injecting and hardening the molded product P, the molded product P may partially shrink.

[0140] At this time, although the first part P1 shrinks, the first part P1 of the molded product P extending in the second direction B orthogonal to the first direction A as the removal direction can be supported by the first sliding core 91, while the lower ends of the second part P2 and the third part P3 extending basically in the first direction A may shrink in the first direction A, thereby being separated from the second sliding core 92 by a distance d1.

[0141] When the first rod 120 and the second rod 130 are raised together in the first direction A and thus press the first sliding core 91 and the second sliding core 92 together, while the first rod 120 and the second rod 130 move a distance d1 in the first direction A, the first sliding core 91 may press the first part P1 of the molded product P while the second sliding core 92 may not press the second part P2 and the third part P3 of the molded product P.

[0142] Therefore, instead of pressing the entire molded product P in the first direction A, only the first portion P1 may be pressed in the first direction A. As shown in FIG.

[0143] As described above, shrinkage stress may be generated between the molded product P and the core 30 due to shrinkage generated when the molded product P is hardened. The molded product P may be pressed toward the core 30 by the shrinkage stress, and the molded product P may be maintained in a state of being inserted into the core 30 .

[0144] Although only the first portion P1 of the molded product P is pressed in the first direction A in a state where shrinkage stress is generated between the molded product P and the core 30, the second portion P2 and the third portion P3 of the molded product P may not move in the first direction A together with the first portion P1 due to the shrinkage stress formed between the second portion P2 and the third portion P3 of the molded product P and the second portion 33 and the third portion 34 of the core 30.

[0145] Therefore, an external force pressing the molded product P in the first direction A may be generated in the first portion P1 of the molded product P, and external forces pressing the molded product P toward the core 30 may be generated in the second portion P2 and the third portion P3. Therefore, the molded product P may be partially broken by external forces in different directions generated at connection portions between the first portion P1 and the second and third portions P2 and P3 of the molded product P.

[0146] At connection portions between the first portion P1 and the second and third portions P2 and P3 of the molded product P, the molded product P may be cut, the shape of the molded product P may be changed, or the molecular structure forming the molded product P may be changed.

[0147] That is, as described above, in order to mold the molded product P (see Figure 3 ) is molded as one piece, although the technical feature for reducing the total weight of the mold 1 is an issue, since the molded product P includes at least three parts P1, P2 and P3 extending in different directions to form the internal space S, the technical feature of removing the molded product P from the core 30 by applying a constant force to the respective parts P1, P2 and P3 without damaging the molded product P may also be a problem.

[0148] Hereinafter, technical features for safely removing the molded product P from the core 30 by the ejector 100 will be described.

[0149] Figure 6 is a schematic cross-sectional view of a movable mold after a molding process in a mold according to the present disclosure, Figure 7 is a cross-sectional view showing a state at a first stage in an ejection process of a molded product in a mold according to the present disclosure, Figure 8 is a cross-sectional view showing a state of a second stage in the ejection process of a molded product in the mold according to the present disclosure, Figure 9 is a cross-sectional view showing a state at a third stage in the ejection process of the molded product in the mold according to the present disclosure.

[0150] As described above, when the molded product P contracts, the upper end 92 a of the second sliding core 92 may be spaced apart by a distance d1 from the lower ends of the second portion P2 and the third portion P3 of the molded product P. Therefore, when the ejector 100 moves in the first direction A to press the first sliding core 91 and the second sliding core 92 , the second sliding core 92 may move the distance d1 in the first direction A without pressing the lower ends of the second portion P2 and the third portion P3 of the molded product P.

[0151] Thus, in order to prevent the ejector 100 from pressing only the first sliding core 91 when the ejector 100 begins to rise in the first direction A inside the template 50, the lower end 91b of the first sliding core 91 may be spaced apart from the upper end 121 of the first rod 120 in the first direction A by the same distance d1 as the distance between the upper end 92a of the second sliding core 92 and the lower ends of the second portion P2 and the lower ends of the third portion P3 of the molded product P.

[0152] That is, before the mold 1 is taken out without driving the ejector 100 , the lower end 91 b of the first sliding core 91 may be spaced apart from the upper end 121 of the first rod 120 by a distance d1 in the first direction A without contacting the upper end 121 of the first rod 120 .

[0153] Therefore, if Figure 7 As shown, when the main body 110 starts to move in the first direction A and moves a first height hl corresponding to the distance d1, the driver 110, the first rod 120, the second rod 130, and the second sliding core 92 can move the first height h1 in the first direction A, while the first sliding core 91 may not move in the first direction A.

[0154] The position where the ejector 100 moves a first height h1 in the first direction A is referred to as the first position 100A of the ejector 100. When the ejector 100 is in the first position 100A, the driver 110 may be located at a first position 110L1 moved a first height h1 from the starting position, and the second sliding core 92 may be located at a first position 92L1 moved a first height h1 from the starting position. The first sliding core 91 may be located at a first position 91L1 with no height change in the first direction A from the starting position.

[0155] The first rod 120 and the second rod 130 may move from a starting position in a first direction A by a first height h1 , like the driver 110 .

[0156] In an injection molding apparatus (not shown), the ejector 100 may be pressed in the first direction A by pressing a pressing rod R at a lower portion of the ejector 100 in the first direction A.

[0157] As described above, since the lower surface 110b of the driver 110 of the ejector 100 is exposed to the outside (see FIG. Figure 5 ), so the ejector 100 can be pressed from the outside of the mold 1.

[0158] The pressing rod R may press the lower end 122 of the first rod 120 in the first direction A. The pressing rod R may be located at a position corresponding to the first rod 120 in the first direction A.

[0159] The diameter of the pressing rod R can substantially correspond to the diameter of the first rod 120 and be smaller than the diameter of the first rod 120. Therefore, the pressing rod R can pass through the first hole 111 and pass through the rod through-hole 35 of the core body 31 from the rear surface 110b of the driver 110, which will be described below. The pressing rod R can press the rear end 122 of the first rod 120. Since the first rod 120 is coupled to the driver 110, the driver 110 can move in the first direction A together with the first rod 120 via the pressing rod R.

[0160] The second rod 130 coupled to the driver 110 , and the first rod 120 and the driver 110 may also be simultaneously moved in the first direction A to the same height together with the first rod 120 and the driver 110 .

[0161] Afterwards, if Figure 8 As shown, the ejector 100 can be further moved in the first direction A from the first position 100A to the second position 100B by continuous pressing of the pressing rod R, and the movement of the driver 110 is restricted in the second position 100B.

[0162] When the ejector 100 moves higher than the first position 100A, the upper end 121 of the first rod 120 may contact the lower end 91 b of the first sliding core 91 and press the first sliding core 91 .

[0163] That is, when the ejector 100 moves to the first height h1 or higher, the first sliding core 91 may also move in the first direction A together with the second sliding core 92 .

[0164] When the ejector 100 reaches the first height h1 or higher, the molded product P may be pressed by the ejector 100 and moved in the first direction A.

[0165] Before the ejector 100 reaches the first position 100A, the first sliding core 91 may not move, and the second sliding core 92 may move to contact the lower ends of the second portion P2 and the third portion P3 of the molded product P. Therefore, the sliding core 90 may not press the molded product P in the first direction A.

[0166] Thereafter, when the ejector 100 moves in the first direction A to a position higher than the first position 100A, the first and second sliding cores 91 and 92 may be pressed by the first and second rods 120 and 130 and press the molded product P in the first direction A together.

[0167] The first and second sliding cores 91 and 92 may press the molded product P with a force greater than the contraction stress formed between the molded product P and the core 30 in the first direction A. Therefore, the molded product P may move in the first direction A together with the sliding core 90 .

[0168] As the ejector 100 continues to move in the first direction A, the upper surface 110a of the driver 110 may contact the lower surface 37 of the core body 31. After the driver 110 contacts the core 30, the driver 110 may no longer move in the first direction A. At this time, the ejector 100 may be located at the second position 100B.

[0169] The second rod 130 coupled to the driver 110 may also no longer move because the movement of the driver 110 in the first direction A is restricted.

[0170] After the driver 110 moves to the first height h1, when the driver 110 moves until the driver 110 contacts the lower surface 37 of the core body 30 and no longer moves to the second height h2, the first rod 120, the second rod 130, the first sliding core 91 and the second sliding core 92 can all move to the second height h2 in the first direction A together with the driver 110.

[0171] When the ejector 100 is located at the second position 100B, the driver 110 can be located at the second position 110L2, at which the upper surface 110a of the driver 110 contacts the lower surface 37 of the core body 31. Since the first rod 120 moves in the first direction A together with the driver 110, the first sliding core 91 can be located at the second position 91L2 by moving the second height h2, and since the second rod 130 moves in the first direction A together with the driver 110, the second sliding core 92 can be located at the second position 92L2 by moving the second height h2.

[0172] The second height h2 may be set as a minimum height of the molded product P moved in the first direction A by the sliding core 90 to substantially offset the shrinkage stress between the molded product P and the core 30 .

[0173] When the ejector 100 moves to a position higher than the second position 100B, only the first rod 120 may move in the first direction A, and thus, only the first portion P1 of the molded product P may be pressed by the first sliding core 91 , which will be described below.

[0174] At this time, the external force applied in the first direction A may be transmitted only to the first portion P1 of the molded product P, and in order to prevent the molded product P from being damaged by the external force, it may be necessary to offset the shrinkage stress between the molded product P and the core 30 .

[0175] Therefore, the minimum height at which the molded product P moves to offset the shrinkage stress between the molded product P and the core 30 may be the minimum height of the second height h2 , and the minimum height may be set to the second height h2 .

[0176] However, in order to minimize the length of the mold 1 extending in the first direction A, the second height h2 may preferably be set to a minimum height at which the molded product P moves to offset the shrinkage stress between the molded product P and the core 30 .

[0177] When the ejector 100 is located at the second position 100B, the coupler 140 may be separated from the first rod 120. Details regarding this will be described below.

[0178] Therefore, if Figure 9 As shown, when the pressing rod R continues to press the ejector 100 , the movement of the driver 110 in the first direction A may be restricted by the core 30 , and only the first rod 120 separated from the driver 110 can move in the first direction A.

[0179] As described above, the pressure rod R can press the lower end 122 of the first rod 120, and since the diameter of the pressure rod R corresponds to the diameter of the first rod 120 or is smaller than the diameter of the first rod 120, the pressure rod R can pass through the first hole 111 of the driver 110 and be inserted into the rod through hole 35 of the core body 31 to continue pressing the first rod 120 in the first direction A.

[0180] The first rod 120 may be further moved from the second height h2 to a third height h3 so that the molded product P reaches a minimum height at which the molded product P can be removed from the core 30. That is, the third height h3 may be a length obtained by subtracting the second height h2 from the minimum height at which the molded product P can be removed from the core 30.

[0181] The third height h3 may be a length longer than a length obtained by subtracting the second height h2 from a minimum height at which the molded product P can be taken out of the core 30 .

[0182] When the first rod 120 further moves from the second height h2 to the third height h3 , the pressing rod R may stop pressing the first rod 120 .

[0183] The position of the ejector 100 when the first rod 120 moves from the second height h2 to the third height h3 is referred to as the third position 100C. When the ejector 100 is at the third position 100C, the third position 91L3 of the first sliding core 91 may be a position moved from the second position 91L2 in the first direction A by the third height h3.

[0184] In this case, the third position 92L3 of the second slide core 92 may be the same as the second position 92L2. In addition, the third position 110L3 of the driver 110 may be the same as the second position 110L2.

[0185] Like the driver 110, the second rod 130 can also be maintained at the same position as when the ejector 100 is located at the second position 100B. Therefore, the third position 92L3 and the second position 92L2 of the second sliding core 92 can be maintained at the same position.

[0186] The length of the third height h3 may be longer than that of the first height h1.

[0187] The total height moved by the first sliding core 91 may be a height obtained by adding the second height h2 and the third height h3, and the total height moved by the second sliding core 92, the body 110 and the second rod 130 may be a height obtained by adding the first height h1 and the second height h2.

[0188] In addition, the total height that the first rod 120 moves may be a height obtained by adding the first height h1 , the second height h2 , and the third height h3 .

[0189] The ejector 100 may move from the starting position in the first direction A to the third position 100C, and a total height to which the first rod 120 moves may be higher than a total height to which the driver 110 and the second rod 130 move.

[0190] Because the first rod 120 is detachable from the driver 110 and the first rod 120 is movable to a height higher than the driver 110 , the total height that the driver 110 moves may be less than the total height that the first sliding core 91 moves to remove the molded product P.

[0191] Therefore, the length of the open space 51 of the template 50 formed to move the driver 110 in the first direction A and the moving hole 61 of the molding plate 61 in the first direction A may be less than the minimum height for taking out the molded product P.

[0192] Typically, since the top plate needs to move a minimum height to remove the molded product, the overall height of the mold increases by the minimum height for removing the molded product, which increases the weight of the mold.

[0193] However, according to an embodiment of the present disclosure, although the driver 110 corresponding to the ejector plate moves to a height lower than a height for taking out the molded product P, the driver 110 may press the molded product P to a height for taking out the molded product P.

[0194] Therefore, the total height of the mold 1 in the first direction A can be reduced, and thus, the weight of the mold 1 can be reduced. Therefore, the mold 1 can be easily transferred and installed in an injection molding apparatus (not shown).

[0195] This may be because the first rod 120 of the ejector 100 may be separated from the driver 110 .

[0196] The ejector 100 may move in the first direction A through three stages.

[0197] That is, the ejector 100 may move in the first direction A through a first stage in which the ejector 100 reaches the first position 100A, a second stage in which the ejector 100 moves further in the first direction A than in the first stage to reach the second position 100B, and a third stage in which the ejector 100 moves further in the first direction A than in the second stage to reach the third position 100C.

[0198] The first stage may offset the interval between the second portion P2 and the third portion P3 of the molded product P and the second sliding core 92 by moving only the second sliding core 92 in the first direction A.

[0199] The second stage can offset the shrinkage stress formed between the molded product P and the core 30 by having both the first sliding core 91 and the second sliding core 92 press the molded product P in the first direction A to press the molded product P in the first direction A so that it is safely not affected by the shrinkage stress formed between the molded product P and the core 30.

[0200] The third stage may be a stage for moving only the first sliding core 91 to press the molded product P while offsetting the contraction stress formed between the molded product P and the core 30, thereby removing the molded product P from the core 30. The third stage can minimize the moving distance of the driver 110 by further moving only the first rod 120 in the first direction A.

[0201] In this way, since the ejector 100 moves in the first direction A through three stages, the molded product P can be safely taken out without damage, and the moving distance of the driver 110 in the first direction A can be reduced, which reduces the size of the mold 1.

[0202] Hereinafter, technical features for coupling / decoupling the first rod 120 with the driver 110 will be described in detail.

[0203] Figure 10 yes Figure 1 An enlarged view of a portion of Figure 11 is a longitudinal sectional view showing a state of a second stage in an ejection process of a molded product in a portion of a mold according to the present disclosure, Figure 12 is a longitudinal sectional view showing a state at a third stage in an ejection process of a molded product in a portion of a mold according to the present disclosure.

[0204] The ejector 100 may include a coupler 140 for maintaining or releasing a coupled state of the driver 110 and the first rod 120 .

[0205] Before the ejector 100 moves to the second position 100B to couple the first rod 120 with the driver 110 , the coupler 140 may be coupled with the first rod 120 .

[0206] The coupler 140 may be coupled to the first rod 120 in the second direction B and detached from the first rod 120 in an opposite direction to the second direction B.

[0207] That is, the coupler 140 is movable between a first position 140A where the coupler 140 is coupled to the first rod 120 and a second position 140B where the coupler 140 is separated from the first rod 120 in the second direction B.

[0208] When the coupling 140 moves in the first direction A instead of the second direction B to couple with / decouple from the first rod 120, the thickness of the driver 110 in the first direction A increases, thereby increasing the total volume of the mold 1. Therefore, preferably, the coupling 140 can move in the second direction B or the third direction C orthogonal to the first direction A.

[0209] The coupler 140 may include a body 141 , a first coupling portion 145 located at one side of the body 141 and coupled to the driver 110 , and a second coupling portion 144 located at the other side of the first coupling portion 145 and coupled to the first rod 120 .

[0210] The first rod 120 may include a lower end portion 123 forming the lower end 122 and located in the lower portion of the first rod 120. The lower end portion 123 may be provided as a configuration independent of the first rod 120 and coupled with the first rod 120. However, the lower end portion 123 may also be integrated into the first rod 120.

[0211] The lower end portion 123 may include a coupling groove 124 into which the second coupling portion 144 is inserted to couple the first rod 120 with the coupler 140 .

[0212] The coupling groove 124 may be in the shape of a groove formed in the outer circumferential surface of the lower end portion 123 in a radial direction.

[0213] The coupler 140 may include an elastic member 149 for pressing the first coupling portion 145 in the second direction B. The elastic member 149 may press the body 141 in the extending direction of the first rod 120 to maintain a state in which the second coupling portion 144 is inserted into the coupling groove 124. The direction in which the elastic member 149 presses the body 141 toward the first rod 120 is referred to as the second direction B. Figure 10 As shown, the coupler 140 may remain in a state of being coupled to the first rod 120 .

[0214] The first coupling portion 145 may be in contact with the body 110 in the first direction A. The first coupling portion 145 may be in contact with the driver 110 to maintain a coupled state of the coupler 140 and the driver 110 .

[0215] The ejector 100 may include a pressing member 38 for pressing the coupler 140 in a direction opposite to the second direction B so that the coupler 140 moves from a first position 140A where the coupler 140 is coupled to the first rod 120 to a second position 140B where the coupler 140 is separated from the first rod 120 .

[0216] When the coupler 140 is located at the first position 140A, the body 141 may be pressed in the second direction B and located at the first position 141A where the second coupling portion 144 is inserted into the coupling groove 124 .

[0217] The pressing member 38 may protrude in an opposite direction to the first direction A from the lower surface 37 of the core 30 .

[0218] The coupler 140 may include an insertion hole 142 through which the pressing member 38 is inserted in a direction opposite to the first direction A. The insertion hole 142 may be positioned to correspond to the pressing member 38 in the first direction A. Therefore, when the driver 110 moves in the first direction A, the insertion hole 142 may move in the first direction A. Since the driver 110 is adjacent to the lower surface 37 of the core 30, the pressing member 38 may be inserted into the insertion hole 142.

[0219] The pressing member 38 may include a pressing portion 38a for pressing the body 141 in an opposite direction to the second direction B when the pressing member 38 is inserted into the insertion hole 142. The pressing portion 38a may be inclined with respect to the first direction A.

[0220] The coupler 140 may further include an inclined portion 143 located on the inner circumferential surface of the insertion hole 142 , inclined relative to the first direction A, and contacting the pressing portion 38 a to be pressed when the pressing member 38 is inserted into the insertion hole 142 .

[0221] The pressing portion 38 a and the inclined portion 143 may be inclined in directions substantially corresponding to each other. However, the inclination angle of the pressing portion 38 a may be different from the inclination angle of the inclined portion 143 .

[0222] Before the pressing member 38 is inserted into the insertion hole 142, the body 141 may be pressed by the elastic member 149 in the second direction B and maintain the coupled state of the coupler 140 and the first rod 120. Therefore, the coupled state of the body 110 and the first rod 120 may be maintained.

[0223] Therefore, when the ejector 100 is located at the first position 100A or before the ejector 100 moves to the second position 100B, the driver 110 and the first rod 120 may move together in the first direction A.

[0224] Afterwards, if Figure 11 As shown, when the ejector 100 is located at the second position 100B, the driver 110 may contact the lower surface 37 of the core body 31 , and thus the pressing member 38 located on the lower surface 37 of the core body 31 may be inserted into the insertion hole 142 .

[0225] When the pressing member 38 is inserted into the insertion hole 142, the pressing portion 38a of the pressing member 38 can press the inclined portion 143 of the insertion hole 142 along the inclined surface obliquely in the opposite direction B to gradually move the body 141 in the opposite direction B.

[0226] Thereafter, when the ejector 100 is located at the second position 100B, the pressing member 38 can be completely inserted into the insertion hole 142. The state of the pressing member 38 inserted into the insertion hole 142 can be maintained, so the pressing member 38 can continue to press the body 141 in the direction opposite to the second direction B.

[0227] The pressing member 38 may include a pressing and holding portion 38 b formed in the first direction A at a height corresponding to the insertion hole 142 when the ejector 100 is located at the second position 100B.

[0228] The pressing and holding portion 38 b can maintain a state in which the main body 141 inserted into the insertion hole 142 is pressed in a direction opposite to the second direction B. By the pressing and holding portion 38 b, the main body 141 can be located at the second position 141B where the second coupling portion 144 is away from the insertion groove 124 and maintained in a state in which the main body 141 is located at the second position 141B.

[0229] Therefore, the coupler 140 may be located at the second position 140B where the coupler 140 is separated from the first rod 120 , and the first rod 120 may be separated from the driver 110 .

[0230] Therefore, if Figure 12 As shown, since the first rod 120 is pressed by the pressing rod R in the first direction A when the first rod 120 is separated from the driver 110, the first rod 120 can move further than the driver 110 in the first direction A, and therefore the driving unit 100 can be located at the third position 100C.

[0231] Although the technical idea of the present disclosure has been described so far based on the specific embodiments, the scope of rights of the present disclosure is not limited to these embodiments.

[0232] It should be understood that various modifications or changes made by those skilled in the art to the technical concept of the present disclosure defined in the claims without departing from the spirit of the present invention also fall within the scope of the rights of the present disclosure.

Claims

1. A mold comprising: a core in which the molded product is formed, the core comprising: a core body; and a sliding core on the core body and separable from the core body in a first direction relative to the core body; and an ejector that presses the sliding core in the first direction to separate the molded product formed in the core from the core, Wherein, the ejector comprises: a driver positioned below the core and movable in the first direction toward a lower surface of the core or in a direction opposite to the first direction away from the lower surface of the core; a first rod movable in the first direction to press the sliding core to be separated from the driver or movable in the direction opposite to the first direction to be coupled to the driver; and a coupler configured to couple the first rod to the driver or to decouple the first rod from the driver, Wherein, the first rod is configured to be pressed by a pressure rod, wherein the driver is configured to move in the first direction when the pressing rod presses the first rod in a state where the first rod is coupled to the driver, and The driver includes a through hole, and the pressing rod is configured to pass through the through hole to press the first rod when the first rod is separated from the driver, so that the first rod can move further than the driver in the first direction.

2. The mold according to claim 1, further comprising a template supporting the core, in, The template includes an open space, at least one area of which is open so that the driver is located inside the template, and The driver is movable to the lower surface of the core in the first direction inside the open space.

3. The mold according to claim 2, further comprising a molding plate located between the core and the template to support the core, in, The molding plate includes a moving hole through which the ejector is movable in the first direction.

4. The mold according to claim 3, wherein A front end of the movement hole faces the lower surface of the core in the first direction, and a rear end of the movement hole faces the open space in the first direction.

5. The mold according to claim 1, wherein The sliding core includes a first sliding core and a second sliding core, wherein the first sliding core is formed on the upper side of the core body in the first direction and is located in the first part of the core body, and the second sliding core is formed on the lower side of the core body in the first direction and is located in the second part of the core body. The first rod is coupled to or separated from the driver and is movable to press the first sliding core in the first direction, and the second rod is coupled to the driver and is movable to press the second sliding core in the first direction. the first rod moves further in the first direction than the driver, and The second rod moves in the first direction in which the driver moves.

6. The mold according to claim 5, wherein The coupler is configured to maintain or release a coupled state of the driver and the first rod.

7. The mold according to claim 6, wherein The coupler is coupled to the first rod in a second direction orthogonal to the first direction, and is separated from the first rod in a direction opposite to the second direction.

8. The mold according to claim 7, wherein The coupler includes one side coupled with the driver and the other side coupled with or released from the first rod.

9. The mold according to claim 8, wherein The ejector further includes an elastic member to connect the driver to one side of the coupler and elastically support the one side of the coupler.

10. The mold according to claim 7, wherein The coupler is movable in the second direction between a first position in which the coupler is coupled to the first rod and a second position in which the coupler is decoupled from the first rod, and The ejector further includes a pressing member to press the coupling in an opposite direction to the second direction to move the coupling from the first position to the second position.

11. The mold according to claim 10, wherein The coupler includes an insertion hole through which the pressing member is inserted in a direction opposite to the first direction, and The pressing member protrudes from the lower surface of the core body in a direction opposite to the first direction.

12. The mold according to claim 11, wherein the pressing member includes a pressing portion that presses the coupler in a direction opposite to the second direction when the pressing member is inserted into the insertion hole, and When the coupling moves in the first direction together with the driver, the pressing member presses the coupling while being inserted into the insertion hole.

13. The mold according to claim 12, wherein The pressing portion is inclined relative to the first direction, and The coupler further includes an inclined portion located on an inner peripheral surface of the insertion hole, inclined with respect to the first direction, and contacting the pressing portion to be pressed by the pressing portion when the pressing member is inserted into the insertion hole.

14. The mold according to claim 5, wherein A space is formed between the first sliding core and the first rod in the first direction.

15. The mold according to claim 14, wherein The ejector presses the second sliding core to move the second sliding core in the first direction by a first distance in the first stage, presses the first sliding core and the second sliding core to further move the first sliding core and the second sliding core together in the first direction by a second distance in the second stage, and presses the first sliding core to further move the first sliding core by a third distance in the third stage.

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