Mold and injection molding machine having same

Abstract

Disclosed are a mold having a heat transfer module through which a fluid flows, and an injection molding machine having same. The mold comprises: a molding surface; and a slot located opposite to the molding surface. The heat transfer module comprises: a base inserted into the slot; poles protruding from the base toward the bottom of the slot; and a flow path formed between the poles and through which the fluid flows, wherein the poles may be in contact with the bottom of the slot.

Description

Mold and injection molding machine equipped with the mold

[0001] The present disclosure relates to a mold and an injection molding machine equipped with the mold. More specifically, the present disclosure relates to a mold used for injection molding, the mold including a heat transfer module (cooling module or heating module) through which a fluid flows, and an injection molding machine equipped with the mold.

[0002] Injection molding is a manufacturing process that involves heating and melting a thermoplastic resin, injecting it under high pressure into a mold cavity, and then cooling it to form a shape. This injection molding process is suitable for mass production and is widely used to produce high-precision plastic parts.

[0003] Typically, the injection molding process involves heating and melting the resin, injecting it into the mold, cooling and solidifying it within the mold, and finally, opening the mold and removing the molded part. The cooling step accounts for a significant portion of the overall process time and directly impacts the quality and productivity of the molded part.

[0004] Conventional molds feature cooling channels formed using gun drilling. However, gun drilling can only produce straight channels, making it difficult to secure optimal cooling channels for the complex shapes of molded parts. This means the distance between the straight channels and the molding surface is inconsistent, resulting in uneven cooling of the molded part. This can lead to problems such as shrinkage and deformation, as well as increased cycle times.

[0005] Recently, much research has been conducted to improve cooling efficiency in the injection molding process.

[0006] The present disclosure aims to solve the above-mentioned and other problems.

[0007] Another purpose may be to provide a mold with improved heat transfer efficiency.

[0008] Another purpose may be to provide a structure that allows the in-mold heat transfer module to be positioned close to the molded part on the mold.

[0009] Another purpose may be to provide a structure that can evenly cool or heat a molded product on a mold with an in-mold heat transfer module.

[0010] Another purpose may be to provide heat transfer modules positioned within a certain distance from the composite surface of the mold in which the molded part is positioned.

[0011] Another purpose may be to provide heat transfer module(s) that are detachably coupled to the mold for easy maintenance, service or replacement.

[0012] Another purpose may be to provide a structure that can minimize the reduction in rigidity of a mold into which a heat transfer module is inserted.

[0013] Another purpose may be to provide a structure that improves the rigidity of the heat transfer module within the mold.

[0014] Another purpose may be to provide various examples of poles of a heat transfer module.

[0015] Another purpose may be to provide a structure for arranging poles to induce turbulence in the fluid of the heat transfer module.

[0016] Another purpose may be to provide a structure that can reduce stagnation of fluid in the heat transfer module.

[0017] Another purpose may be to provide a method for improving the corrosion resistance and rigidity of a heat transfer module.

[0018] According to one aspect of the present disclosure for achieving the above or other purposes, a mold having a heat transfer module through which a fluid flows may include: a molding surface; and a slot positioned opposite the molding surface, wherein the heat transfer module may include: a base inserted into the slot; poles protruding from the base toward the bottom of the slot; and a flow path formed between the poles through which the fluid flows, wherein the poles may contact the bottom of the slot.

[0019] The effects of the mold according to the present disclosure and the injection molding machine equipped with the mold are as follows.

[0020] According to at least one of the embodiments of the present disclosure, a mold having improved heat transfer efficiency can be provided.

[0021] According to at least one of the embodiments of the present disclosure, a structure can be provided in which an in-mold heat transfer module can be placed close to a molded product on the mold.

[0022] According to at least one of the embodiments of the present disclosure, a structure capable of evenly cooling or heating a molded product on a mold can be provided using an in-mold heat transfer module.

[0023] According to at least one of the embodiments of the present disclosure, heat transfer modules may be provided that are positioned within a certain distance from a composite surface of a mold in which a molded article is positioned.

[0024] According to at least one of the embodiments of the present disclosure, a heat transfer module(s) can be provided that is detachably coupled to a mold and is easy to maintain, repair, or replace.

[0025] According to at least one of the embodiments of the present disclosure, a structure can be provided that can minimize a decrease in rigidity of a mold into which a heat transfer module is inserted.

[0026] According to at least one of the embodiments of the present disclosure, a structure can be provided that improves the rigidity of a heat transfer module within a mold.

[0027] According to at least one of the embodiments of the present disclosure, various examples of poles of a heat transfer module can be provided.

[0028] According to at least one of the embodiments of the present disclosure, a structure for arranging poles for inducing turbulence in a fluid of a heat transfer module can be provided.

[0029] According to at least one of the embodiments of the present disclosure, a structure capable of reducing stagnation of fluid in a heat transfer module can be provided.

[0030] According to at least one of the embodiments of the present disclosure, a method for improving corrosion resistance and rigidity of a heat transfer module can be provided.

[0031] Further scope of the applicability of the present disclosure will become apparent from the detailed description below. However, since various modifications and variations within the spirit and scope of the present disclosure will become apparent to those skilled in the art, it should be understood that the detailed description and specific examples, such as preferred embodiments of the present disclosure, are given by way of example only.

[0032] Figures 1 to 30 are drawings illustrating examples of molds and injection molding machines equipped with the molds according to embodiments of the present disclosure.

[0033] Hereinafter, embodiments disclosed in this specification will be described in detail with reference to the attached drawings. Regardless of the drawing numbers, identical or similar components are given the same reference numbers and redundant descriptions thereof will be omitted.

[0034] The suffixes "module" and "part" used for components in the following description are given or used interchangeably only for the convenience of writing specifications, and do not have distinct meanings or roles in themselves.

[0035] In addition, when describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiments disclosed in this specification, the detailed description thereof will be omitted. In addition, the attached drawings are only intended to facilitate easy understanding of the embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and technical scope of the present disclosure.

[0036] Terms that include ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by these terms. These terms are used solely to distinguish one component from another.

[0037] When a component is described as “coupled,” “fixed,” “mounted,” “connected,” “linked,” etc., to another component, there may be other components between that component and the other component. When a component is described as “directly coupled,” “directly fixed,” “directly mounted,” “directly connected,” “directly connected,” etc. to another component, there may not be other components between them.

[0038] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0039] In this application, terms such as “include” or “have” are intended to specify the presence of a feature, number, step, operation, component, part or combination thereof described in the specification, but should be understood not to exclude in advance the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts or combinations thereof.

[0040]

[0041] Referring to FIG. 1, an injection molding machine (1) may include a fixed mold (10) and a moving mold (20). The fixed mold (10) may be installed on a stationary plate of the injection molding machine (1). The moving mold (20) may be installed on a movable plate of the injection molding machine (1) and may move together with the movable plate. The fixed mold (10) may be referred to as a fixed side (10) or an upper core (10). The moving mold (20) may be referred to as a moving side (20) or a lower core (20).

[0042] A fixed mold (10) and a movable mold (20) can be closed to form a pouring system and a cavity. The process of closing the fixed mold (10) and the movable mold (20) can be referred to as a mold closing (molding clamping) process. The groove (10G) can be recessed from one surface (the lower surface in FIG. 1) of the fixed mold (10) facing the movable mold (20) and can be referred to as a cavity (10G) or a molding surface (10G). The groove (20G) can be recessed from one surface (the upper surface in FIG. 1) of the movable mold (20) facing the fixed mold (10) and can be referred to as a core (20G) or a molding surface (20G). A molded product (part) can be formed between the cavity (10G) and the core (20G). The cavity (10G) can form the external shape of the molded product, and the core (20G) can form the internal shape of the molded product. Meanwhile, the space between the grooves (10G) and the grooves (20G) can be referred to as a cavity (1C).

[0043] The above injection system may be a system for injecting a molten material (M) into a cavity (1C). The process of injecting the molten material (M) into the cavity (1C) may be referred to as an injection process. The injection system may include a nozzle (2), a sprue (3), a runner (4), and a gate (5). The molten material (M) may be injected into the sprue (3) through the nozzle (2). The molten material (M) may be a thermoplastic material such as a plastic or a resin. The molten material (M) may be referred to as a charge. The sprue (3) may be a passage formed in a fixed mold (10). The molten material passing through the sprue (3) may be provided to the cavity (1C) through the runner (4) and the gate (5) between the fixed mold (10) and the movable mold (20). For example, there may be two or more cavities (1C), and the same number of runners (4) and gates (5) as the number of cavities (1C) may be formed between the fixed mold (10) and the movable mold (20). The flow of the melt described above may be caused by a pressure (P) applied from the nozzle (2) toward the sprue (3).

[0044] Following the aforementioned mold closing process and injection process, a holding pressure process may be performed to compensate for shrinkage of the melt (M) filled in the cavity (1C). Subsequently, the melt (M) in the cavity (1C) may be cooled. Subsequently, the mold may be opened as the movable mold (20) moves away from the fixed mold (10), and the molded product may be positioned on the core (20G) side of the movable mold (20). Subsequently, an ejector pin (6) may be operated to remove the molded product from the movable mold (20). Accordingly, a molded product may be manufactured. For example, the molded product may be a back cover of a display device.

[0045]

[0046] Referring to FIGS. 2 and 3, a groove (10G) can be formed in the bottom (10B) of the fixed mold (10), and the top (10A) of the fixed mold (10) can be positioned opposite the bottom (10B).

[0047] A cooling channel (100') may be formed in a fixed mold (10). The cooling channel (100') may be formed in the fixed mold (10) by a gun drill. The cooling channel (100') may include a plurality of straight channels. The cooling channel (100') may include a first channel (101'), a second channel (102'), and a third channel (103'). The first channel (101') and the second channel (102') may be formed from a side of the fixed mold (10) to an inside of the fixed mold (10) and may extend linearly. The third channel (103') may intersect the first channel (101') and the second channel (102') and connect the first channel (101') and the second channel (102'). For example, a plurality of cooling channels (100') can be formed in a fixed mold (10).

[0048] The supply line (P1', inlet line) is a pipe through which cooling water flows, can be inserted into the fixed mold (10), and can be connected to the first channel (101'). The discharge line (P2', outlet line) is a pipe through which cooling water flows, can be inserted into the fixed mold (10), and can be connected to the second channel (102'). The supply line (P1') and the discharge line (P2') can be connected to each of the plurality of cooling channels (100').

[0049] Accordingly, the cooling water of the supply line (P1') can flow sequentially through the first to third channels (101', 102', 103') and cool the melt located in the groove (10G) of the fixed mold (10). The cooling water, which has increased in temperature while flowing through the cooling channel (100'), can be discharged to the discharge line (P2'). The heat of the cooling water of the discharge line (P2') can be released to the outside and then provided to the supply line (P1'). For example, a cooling water pump can cause the flow of the aforementioned cooling water.

[0050]

[0051] Referring to FIGS. 4 and 5, a groove (10G) may be formed in the bottom (10B) of the fixed mold (10), and the top (10A) of the fixed mold (10) may be positioned opposite the bottom (10B). A slot (10S) may be formed by being recessed from the top (10A) of the fixed mold (10). The slot (10S) may be referred to as a receiving space (10S).

[0052] A cooling module (100) can be inserted into a slot (10S) of a fixed mold (10). The shape of the cooling module (100) can correspond to the shape of the slot (10S). The cooling module (100) can be located on the bottom of the slot (10S). The height of the cooling module (100) can be smaller than the depth of the slot (10S). The cooling module (100) can be referred to as a cooling block (100). For example, a plurality of cooling modules (100) can be inserted into the fixed mold (10).

[0053] The cover part (10Q) can cover the cooling module (100) inserted into the slot (10S). The cover part (10Q) can be referred to as a second part (10Q). The fixed mold (10) can include a first part (10P) in which the slot (10S) is formed and a second part (10Q).

[0054] A cooling channel (103) may be formed in the cooling module (100). The cooling channel (103) may be referred to as a path (103). The cooling channel (103) may be formed between a plurality of poles (102) of the cooling module (100). The cooling channel (103) may be positioned corresponding to a groove (10G) of the fixed mold (10). The cooling channel (103) may be formed in each of the plurality of cooling modules (100).

[0055] The supply line (P1, inlet line) is a pipe through which a fluid such as a coolant flows, and can be inserted into the fixed mold (10) and connected to the cooling channel (103). The outlet line (P2, outlet line) is a pipe through which a fluid such as a coolant flows, and can be inserted into the fixed mold (10) and connected to the cooling channel (103). The supply line (P1) may be adjacent to one end of the cooling channel (103), and the outlet line (P2) may be adjacent to the other end of the cooling channel (103). The supply line (P1) and the outlet line (P2) may be connected to each of a plurality of cooling channels (103). The fluid flowing in the supply line (P1) and the outlet line (P2) may be coolant. The fluid may include water. The fluid may include water and additives such as a corrosion inhibitor and antifreeze. Alternatively, the fluid may include oil or a coolant as a substance other than water.

[0056] Accordingly, the cooling water of the supply line (P1) can flow through the cooling channel (103) and cool the melt located in the groove (10G) of the fixed mold (10). The cooling water, which has increased in temperature while flowing through the cooling channel (103), can be discharged through the discharge line (P2). The heat of the cooling water of the discharge line (P2) can be released to the outside and then supplied to the supply line (P1). For example, a cooling water pump can cause the flow of the aforementioned cooling water.

[0057] Meanwhile, the cooling channel (103) may also be used as a channel for heating, rather than cooling, an object located in the groove (10G) of the fixed mold (10). In this case, the cooling module (100) may be referred to as a heating module (100), and the cooling channel (103) may be referred to as a heating channel (103). The supply line (P1) may provide a relatively hot fluid to the heating channel (103) of the heating module (100), and the fluid may be discharged to the discharge line (P2) with its temperature lowered while passing through the heating channel (103). The heating module (100) or the cooling module (100) may be referred to as a heat transfer module (100).

[0058] Meanwhile, the cooling module (100) may be provided in the moving mold (20).

[0059] Hereinafter, for the sake of brief explanation, the description will be made on the assumption that the fixed mold (10) has a cooling module (100). The description below may be applied to the case where the fixed mold (10) has a heating module (100) and the movable mold (20) has a cooling module (100) or a heating module (100). In addition, for the sake of brief explanation, it is described that cooling water flows in the cooling module (100), but other fluids such as oil or coolant in addition to cooling water may flow in the cooling module (100).

[0060]

[0061] Referring to FIG. 6, the cooling channel (100') of FIGS. 2 and 3 can be spaced apart from the groove (10G) of the fixed mold (10) by a certain distance (D'), and the cooling channel (103) of FIGS. 4 and 5 can be spaced apart from the groove (10G) of the fixed mold (10) by a certain distance (D). The distances (D', D) can be equal to each other.

[0062] While the cooling channel (100') forms a linear cooling path, the cooling channel (103) can form a cooling path that spreads relatively widely on one side of the cooling module (100) toward the groove (10G).

[0063] Accordingly, the cooling channel (103) can cool the melt on the groove (10G) of the fixed mold (10) more efficiently than the cooling channel (100'). As a result, high-temperature molding becomes possible, molding quality can be improved, and cycle time can be reduced.

[0064]

[0065] Referring to FIGS. 7 and 8, the cooling module (100) may include a base (101), poles (102), and cooling channels (103).

[0066] The base (101) may be the bottom of a groove sunken from one side of the body (104, see FIG. 22) of the cooling module (100). The base (101) may be sandwiched between the first part (10P) and the second part (10Q) of the fixed mold (10) (see FIG. 4).

[0067] The poles (102) may protrude from one side of the base (101) facing the groove (10G, see FIG. 6) of the fixed mold (10). The poles (102) may be referred to as columns (102). The poles (102) may be spaced apart from each other. The poles (102) may form rows and columns. The rows may be defined in the horizontal direction of FIG. 8, and the columns may be defined in the vertical direction of FIG. The rows (R1, R3, R5, ...) formed by the poles (102) of the odd columns (C1, C3, C5, ...) may be alternately arranged with the rows (R2, R4, R6, ...) formed by the poles (102) of the even columns (C2, C4, C6, ...). The columns (C1, C3, C5, ...) formed by the poles (102) of the odd rows (R1, R3, R5, ...) can be arranged alternately with the columns (C2, C4, C6, ...) formed by the poles (102) of the even rows (R2, R4, R6, ...).

[0068] A cooling channel (103) can be formed between the poles (102). Coolant in the supply line (P1) can flow along the cooling channel (103) and be discharged to the discharge line (P2).

[0069]

[0070] Referring to FIGS. 8 and 9, the poles (102) of the cooling module (100) may be arranged to intersect the flow direction of the coolant in the cooling channel (103). A diamond-shaped coolant flow path may be formed around one pole (102). The coolant flowing in the cooling channel (103) may have a Reynolds number (Re) of 4,000 to 10,000. That is, the coolant may flow in the cooling channel (103) as a turbulent flow. Cooling using coolant flowing in this manner may be referred to as vortex cooling or turbulent cooling.

[0071] Compared to the above turbulent cooling, a cooling water having a Reynolds number (Re) of 1,000 to 2,000 can form a laminar flow. The above turbulent cooling is a flow that is more advantageous for heat transfer than laminar cooling, and thus can have better cooling efficiency.

[0072] For example, to lower the temperature of a molded product on a groove (10G) of a fixed mold (10) from 80°C to 60°C, laminar cooling may take 34 seconds, and turbulent cooling may take 21 seconds. In other words, turbulent cooling may shorten the time required to lower the temperature of the molded product by 38% compared to laminar cooling.

[0073] As another example, the turbulent cooling can reduce the time required to lower the temperature of the molded part from 150°C to 50°C by 28% compared to the laminar cooling.

[0074] As another example, when the channel (103) is provided as a heating channel (103), the turbulent heating can shorten the time required to raise the temperature of the molded product from 50°C to 150°C by 29% compared to laminar heating.

[0075]

[0076] Referring to FIG. 10, the cooling module (100) may have a shape of a horizontally long rectangle. The length (L10) of the cooling module (100) may be greater than the width (W10). The cooling water (C) flowing through the cooling channel (130) of the cooling module (100) may form a turbulent flow. For example, if the width (W10) is 60 mm, the length (L10) may be 750 mm or less. For example, if the width (W10) is 70 mm, the length (L10) may be 650 mm or less. For example, if the width (W10) is 80 mm, the length (L10) may be 570 mm or less. However, stagnation of the cooling water (C) may occur at the four corners of the cooling module (100).

[0077] Parts (100C1, 100C2, 100C3, 100C4) forming the four corners of the cooling module (100) may be cut out. Alternatively, only parts (100C3, 100C4) forming the two corners of the cooling module (100) adjacent to the discharge line (P2) may be cut out, and parts (100C1, 100C2) forming the two corners of the cooling module (100) adjacent to the supply line (P1) may not be cut out. Accordingly, the flow of stagnant cooling water (C) can be reduced, and the cooling performance of the cooling module (100) can be improved.

[0078] Accordingly, the cooling module (100) may have a horizontally long octagonal shape. In this case, the cooling module (100) may include first to eighth sides (100E1, 100E2, 100E3, 100E4, 100E5, 100E6, 100E7, 100E8).

[0079] The first side (100E1) and the second side (100E2) can form long sides of the cooling module (100). The third side (100E3), the fourth side (100E4), and the seventh side (100E7) can be short sides that connect the first side (100E1) and the second side (100E2) and form one end of an octagon. The fifth side (100E5), the sixth side (100E6), and the eighth side (100E8) can be short sides that connect the first side (100E1) and the second side (100E2) and form the other end of the octagon.

[0080] In this case, all interior angles of the shape formed by the cooling module (100) may be obtuse angles. That is, each side of the cooling module (100) may be connected to its adjacent side to form an obtuse angle. In other words, at each vertex of the shape formed by the cooling module (100), two sides may meet to form an obtuse angle.

[0081]

[0082] Referring to FIGS. 11 to 20, the pole (102) of the cooling module (100) may have various shapes.

[0083] Referring to FIGS. 11 and 12, the cooling module (100) may include ball-shaped poles (102) and cooling channels (103) between the poles (102). In this case, the base (101) may be omitted. The poles (102) may be referred to as spheres (102) or balls (102). The ball-shaped poles (102) may be inserted into slots (10S) of a first part (10P) of a fixed mold (10). A diameter (Dr) of the poles (102) may be equal to or smaller than a depth (Dt) of the slots (10S). The poles (102) may be positioned on a bottom (10Sa) of the slots (10S). A side wall (10Sb) of the slots (10S) may surround the poles (102). The second part (10Q) of the fixed mold (10) can cover the poles (102) inserted into the slots (10S) and can be joined to the first part (10P). Cooling water flowing through the cooling channel (103) formed between the poles (102) can cool the molded product on the groove (10G) of the fixed mold (10).

[0084] Referring to FIG. 13, the cooling module (100) may include a cylindrical pole (102) instead of the ball-shaped pole (102) of FIGS. 11 and 12. The pole (102) may be referred to as a cylinder (102). Alternatively, the pole (102) may have a shape other than a ball or cylinder, such as a prism (triangular prism, square prism, pentagonal prism, hexagonal prism, etc.). The poles (102) may be inserted into a slot (10S, see FIG. 11) of a first part (10P) of a fixed mold (10). The height (Hr) of the pole (102) may be equal to or less than the depth (Dt, see FIG. 11) of the slot (10S). The end (102b) of the pole (102) may be located on the bottom (10Sa) of the slot (10S). The side wall (10Sb) of the slot (10S) can surround the poles (102). The second part (10Q) of the fixed mold (10) can cover the poles (102) inserted into the slot (10S) and can be joined to the first part (10P). Cooling water flowing through the cooling channel (103) formed between the side surfaces (102c) of the poles (102) can cool the molded product on the groove (10G) of the fixed mold (10).

[0085] Referring to FIGS. 14 to 16, the cooling module (100) may include poles (102) and cooling channels (103) between the poles (102). The poles (102) may have a cylindrical shape with concave sides. The overall shape of the poles (102) may resemble a dog bone. The poles (102) may include a support part (1021), a bottom part (1022), and a top part (1023). The bottom part (1022) may form a lower portion of the cylinder. The top part (1023) may form an upper portion of the cylinder. The support part (1021) may connect the bottom part (1022) and the top part (1023), and a cross-section of the support part (1021) may form a double vertex. Accordingly, the structural stability of the poles (102) may be improved.

[0086] The poles (102) can be inserted into the slots (10S, see FIG. 11) of the first part (10P) of the fixed mold (10). The height (Hu) of the pole (102) can be equal to or smaller than the depth (Dt, see FIG. 11) of the slot (10S). The top part (1023) of the pole (102) can be positioned on the bottom (10Sa) of the slot (10S). The side wall (10Sb) of the slot (10S) can surround the poles (102). The second part (10Q) of the fixed mold (10) can cover the bottom parts (1022) of the poles (102) inserted into the slot (10S) and can be coupled to the first part (10P). Cooling water flowing through the cooling channel (103) formed between the support parts (1021) of the poles (102) can cool the molded product on the groove (10G) of the fixed mold (10).

[0087] Meanwhile, the bottom parts (1022) of the poles (102) may be formed as one body to form the base (101), and the support part (1021) and the top part (1023) of the poles (102) may protrude from the base (101). Alternatively, the bottom parts (1022) of the poles (102) may be formed separately to form a portion of the base (101), and the support part (1021) and the top part (1023) of each pole (102) may protrude from each bottom part (1022).

[0088] Referring to FIG. 14, the support part (1021) can form a first height (H1), the bottom part (1022) can form a second height (H2), and the top part (1023) can form a third height (H3). The second height (H2) and the third height (H3) can be equal to or similar to each other. The first height (H1) can be equal to or similar to the sum of the second height (H2) and the third height (H3). The support part (1021) can form a curved surface of a first radius (R1). The first radius (R1) can be equal to or similar to half of the first height (H1). The first radius (R1) can be equal to or similar to the second height (H2). The first radius (R1) can be determined according to the spacing (i.e., pitch) between the poles (102). For example, if the spacing between the poles (102) is 20 mm, the first radius (R1) may be 3 to 5 mm. In this way, since the support part (1021) has a hyperboloid shape, the connection portion between the support part (1021) and the bottom and top parts (1022, 1023) may be formed to be curved. In this case, the stress concentration at the connection portion can be reduced, so that the structural stability of the pole (102) can be improved. That is, the cooling module (100) can stably support the injection pressure applied to the fixed mold (10).

[0089] Referring to FIG. 15, the support part (1021) can form a first height (H1') that is greater than the first height (H1, see FIG. 14), the bottom part (1022) can form a second height (H2') that is less than the second height (H2, see FIG. 14), and the top part (1023) can form a third height (H3') that is less than the third height (H3, see FIG. 14). The first radius (R1') formed by the support part (1021) can be greater than the first radius (R1, see FIG. 14). That is, the pole (102) of FIG. 15 can include a longer support part (1021) and shorter bottom and top parts (1022, 1023) than the pole (102) of FIG. 14. The first radius (R1') can be determined according to the spacing (i.e., pitch) between the poles (102). For example, if the spacing between the poles (102) is 20 mm, the first radius (R1') can be 3 to 5 mm. In this way, since the support part (1021) has a hyperboloid shape, the connection portion between the support part (1021) and the bottom and top parts (1022, 1023) can be formed to be curved. In this case, the stress concentration at the connection portion can be reduced, so that the structural stability of the pole (102) can be improved. That is, the cooling module (100) can stably support the injection pressure applied to the fixed mold (10).

[0090] Referring to FIG. 16, the first radius (R1'') formed by the support part (1021) may be equal to or greater than the first radius (R1', see FIG. 14). The width (W1'') of the thinnest part of the support part (1021) may be smaller than the width (W1') of the thinnest part of the support part (1021) of FIG. 15. The first radius (R1'') may be determined according to the spacing (i.e., pitch) between the poles (102). For example, if the spacing between the poles (102) is 20 mm, the first radius (R1'') may be 3 to 5 mm. In this way, since the support part (1021) has a hyperboloid shape, the connecting portions of the support part (1021) and the bottom and top parts (1022, 1023) may be formed to be curved. In this case, the stress concentration at the above-mentioned connection portion can be reduced, thereby improving the structural stability of the pole (102). That is, the cooling module (100) can stably support the injection pressure applied to the fixed mold (10).

[0091] Referring to FIG. 17, the cooling module (100) may include poles (102) and cooling channels (103) between the poles (102). The poles (102) may have a cylindrical shape with concave sides. The overall shape of the poles (102) may resemble a dog bone. The poles (102) may include a support part (1021), a bottom part (1022), and a top part (1023). The bottom part (1022) may form a lower portion of the cylinder. The top part (1023) may form an upper portion of the cylinder. The support part (1021) may connect the bottom part (1022) and the top part (1023). A cross-section of the support part (1021) may include a straight line and a curved line opposite to the straight line. Accordingly, the structural stability of the pole (102) can be improved.

[0092] The poles (102) can be inserted into the slots (10S, see FIG. 11) of the first part (10P) of the fixed mold (10). The height (Hv) of the poles (102) can be equal to or smaller than the depth (Dt, see FIG. 11) of the slots (10S). The top part (1023) of the poles (102) can be positioned on the bottom (10Sa) of the slots (10S). The side wall (10Sb) of the slots (10S) can surround the poles (102). The second part (10Q) of the fixed mold (10) can cover the bottom parts (1022) of the poles (102) inserted into the slots (10S) and can be coupled to the first part (10P). Cooling water flowing through the cooling channel (103) formed between the support parts (1021) of the poles (102) can cool the molded product on the groove (10G) of the fixed mold (10).

[0093] The support part (1021) can form a first height (H1'), the bottom part (1022) can form a second height (H2'), and the top part (1023) can form a third height (H3'). The second height (H2') and the third height (H3') can be equal to or similar to each other. The first height (H1') can be equal to or similar to the sum of the second height (H2') and the third height (H3'). The support part (1021) can include a first part (1021a), a second part (1021b), and a third part (1021c). The first part (1021a) can have a cylindrical shape and can have a constant diameter. The second part (1021b) can connect the first part (1021a) and the bottom part (1022), and can have a diameter that increases as it moves away from the first part (1021a). The third part (1021c) can connect the first part (1021a) and the top part (1023), and can have a diameter that increases as it moves away from the first part (1021a). Each of the second and third parts (1021b, 1021c) can form a portion of a hyperboloid. In this case, the connection portion between the support part (1021) and the bottom and top parts (1022, 1023) can be formed to be curved (see the radius of curvature (R2', R3') of FIG. 17). In this case, the stress concentration at the connection portion can be reduced, and the structural stability of the pole (102) can be improved. That is, the cooling module (100) can stably support the injection pressure applied to the fixed mold (10).

[0094] Meanwhile, the bottom parts (1022) of the poles (102) may be formed as one body to form the base (101), and the support part (1021) and the top part (1023) of the poles (102) may protrude from the base (101). Alternatively, the bottom parts (1022) of the poles (102) may be formed separately to form a portion of the base (101), and the support part (1021) and the top part (1023) of each pole (102) may protrude from each bottom part (1022).

[0095]

[0096] Referring to FIGS. 18 and 19 , the cooling module (100) may include poles (102) and cooling channels (103) between the poles (102). The poles (102) may have a cylindrical shape with concave sides. The overall shape of the poles (102) may resemble a nozzle or a bottle neck. The poles (102) may include a support part (1021) and a bottom part (1022). The bottom part (1022) may form the lower portion of the cylinder. The support part (1021) may be connected to the bottom part (1022). The cross-section of the support part (1021) may include a straight line and a curved line connected to the straight line. Accordingly, the structural stability of the poles (102) may be improved.

[0097] The poles (102) can be inserted into the slots (10S, see FIG. 11) of the first part (10P) of the fixed mold (10). The height (Hw) of the poles (102) can be equal to or smaller than the depth (Dt, see FIG. 11) of the slots (10S). The support part (1021) of the poles (102) can be positioned on the bottom (10Sa) of the slots (10S). The side wall (10Sb) of the slots (10S) can surround the poles (102). The second part (10Q) of the fixed mold (10) can cover the bottom parts (1022) of the poles (102) inserted into the slots (10S) and can be coupled to the first part (10P). Cooling water flowing through the cooling channel (103) formed between the support parts (1021) of the poles (102) can cool the molded product on the groove (10G) of the fixed mold (10).

[0098] Referring to FIG. 18, the support part (1021) can form a first height (H11), and the bottom part (1022) can form a second height (H12). The first height (H11) and the second height (H12) can be the same or similar to each other. The support part (1021) can include a first part (1021a) and a second part (1021b). The first part (1021a) can have a cylindrical shape and can have a constant diameter. The second part (1021b) can connect the first part (1021a) and the bottom part (1022), and can have a diameter that increases as it gets farther away from the first part (1021a). The second part (1021b) can form a part of a hyperboloid. In this case, the connection portion between the support part (1021) and the bottom part (1022) can be formed to be curved (see the radius of curvature (R12) of FIG. 18). In this case, the stress concentration at the connection portion can be reduced, thereby improving the structural stability of the pole (102). That is, the cooling module (100) can stably support the injection pressure applied to the fixed mold (10).

[0099] Referring to FIG. 19, the support part (1021) can form a first height (H11') that is greater than the first height (H11, see FIG. 18), and the bottom part (1022) can form a second height (H12') that is smaller than the second height (H12, see FIG. 18). The first height (H11') can be greater than the second height (H12'). The support part (1021) can include a first part (1021a) and a second part (1021b). The first part (1021a) can have a cylindrical shape and can have a constant diameter. The second part (1021b) can connect the first part (1021a) and the bottom part (1022), and can have a diameter that increases as it gets farther away from the first part (1021a). The second part (1021b) may form a portion of a hyperboloid. In this case, the connection portion between the support part (1021) and the bottom part (1022) may be formed to be curved (see the radius of curvature (R12') of FIG. 18). In this case, the stress concentration at the connection portion can be reduced, thereby improving the structural stability of the pole (102). That is, the cooling module (100) can stably support the injection pressure applied to the fixed mold (10).

[0100] Meanwhile, the bottom parts (1022) of the poles (102) may be formed as one body to form the base (101), and the support parts (1021) of the poles (102) may protrude from the base (101). Alternatively, the bottom parts (1022) of the poles (102) may be formed separately to form a portion of the base (101), and the support parts (1021) of each pole (102) may protrude from each bottom part (1022).

[0101]

[0102] Referring to FIG. 20, the cooling module (100) may include poles (102) and cooling channels (103) between the poles (102). The poles (102) may have a cylindrical shape with concave sides. The shape of the poles (102) may generally resemble a truncated cone. The poles (102) may include a support part (1021) and a bottom part (1022). The bottom part (1022) may form the lower portion of the cylinder. The support part (1021) may be connected to the bottom part (1022). The cross-section of the support part (1021) may include a straight line and a curved line connected to the straight line. Accordingly, the structural stability of the poles (102) may be improved.

[0103] The poles (102) can be inserted into the slots (10S, see FIG. 11) of the first part (10P) of the fixed mold (10). The height (Hx) of the poles (102) can be equal to or smaller than the depth (Dt, see FIG. 11) of the slots (10S). The support part (1021) of the poles (102) can be positioned on the bottom (10Sa) of the slots (10S). The side wall (10Sb) of the slots (10S) can surround the poles (102). The second part (10Q) of the fixed mold (10) can cover the bottom parts (1022) of the poles (102) inserted into the slots (10S) and can be coupled to the first part (10P). Cooling water flowing through the cooling channel (103) formed between the support parts (1021) of the poles (102) can cool the molded product on the groove (10G) of the fixed mold (10).

[0104] The support part (1021) can form a first height (H21), and the bottom part (1022) can form a second height (H22). The first height (H21) and the second height (H22) can be equal to or similar to each other. Alternatively, the first height (H21) can be greater than the second height (H22). The support part (1021) can include a first part (1021a) and a second part (1021b). The first part (1021a) can form a portion of a truncated cone and can have a diameter that increases as it approaches the bottom part (1022). The second part (1021b) can connect the first part (1021a) and the bottom part (1022), and can have a diameter that increases as it moves away from the first part (1021). The second part (1021b) may form a portion of a hyperboloid. In this case, the connection portion between the support part (1021) and the bottom part (1022) may be formed to be curved (see the radius of curvature (R12) of FIG. 18). In this case, the stress concentration at the connection portion can be reduced, thereby improving the structural stability of the pole (102). That is, the cooling module (100) can stably support the injection pressure applied to the fixed mold (10).

[0105] Meanwhile, the bottom parts (1022) of the poles (102) may be formed as one body to form the base (101), and the support parts (1021) of the poles (102) may protrude from the base (101). Alternatively, the bottom parts (1022) of the poles (102) may be formed separately to form a portion of the base (101), and the support parts (1021) of each pole (102) may protrude from each bottom part (1022).

[0106]

[0107] Referring to FIGS. 21 and 22, a groove (10G) in which a molded product (M) is positioned may be formed in a first part (10P) of a fixed mold (10). For example, the molded product (M) may be a back cover of a display device. The slot (10S) may be recessed from one surface (upper surface of FIG. 21) of the first part (10P) opposite to the groove (10G). The slots (10S) may be formed in the first part (10P) of the fixed mold (10). The slots (10S) may be spaced apart from each other. The portion of the first part (10P) between the slots (10S) may be referred to as a partition wall (10W).

[0108] A cooling module (100) may include a body (104), a base (101), poles (102), and a cooling channel (103). The body (104) may form an outer appearance of the cooling module (100) and may be inserted into a slot (10S). The shape of the slot (10S) may correspond to the shape of the body (104). A side wall (10Sb) of the slot (10S) may extend along a side surface of the body (104). The base (101) may be a bottom of a groove that is recessed from one side (the lower surface of FIG. 22) of the body (104) toward the bottom (10Sa) of the slot (10S). The poles (102) may protrude from the base (101) toward the bottom (10Sa) of the slot (10S) and may contact the bottom (10Sa). A cooling channel (103) may be formed between the poles (102). A portion of the cooling channel (103) may be formed between the pole (102) and the bulkhead (10W). That is, the cooling water of the cooling channel (103) may flow on the bottom (10Sa) of the slot (10S) and may be positioned close to the groove (10G). Each of the cooling modules (100) may be inserted into each of the slots (10S).

[0109] The second part (10Q) of the fixed mold (10) can cover the cooling module (100) inserted into the slot (10S). At least one second part (10Q) can cover the cooling modules (100) inserted into the slots (10S). A supply line (P1) for providing cooling water to the cooling module (100) can pass through the second part (10Q). The supply line (P1) can be bent at least once. A discharge line (P2) for discharging cooling water from the cooling module (100) can pass through the second part (10Q). The discharge line (P2) can be bent at least once.

[0110] For example, the second part (10Q) can be fixed to the first part (10P) by fastening members (F) such as bolts. The fastening members (F) can be positioned around the cooling module (100). When the second part (10Q) is coupled to the first part (10P), the cooling module (100) can be sandwiched between the first part (10P) and the second part (10Q). Since the poles (102) of the cooling module (100) supported by the second part (10Q) contact the bottom (10Sa) of the slot (10S), the rigidity deterioration of the fixed mold (10) having the slot (10S) can be minimized, and as a result, the mold quality can be improved. For example, the cooling module (100) can be manufactured from a material having an allowable stress of 450 MPa or more. For example, the cooling module (100) can be manufactured from steel having a carbon content of 45% or more. For example, the material of the cooling module (100) can be SM45C, HP4M, or CENA-G.

[0111] Accordingly, an assembly of the first part (10P), the second part (10Q), and the cooling module (100) can be formed. The fixed mold (10) and the cooling module (100) can be collectively referred to as the assembly. Since the assembly is easy to disassemble, the user can easily maintain, repair, or replace the modular cooling module (100). In addition, an anti-corrosion coating to prevent corrosion due to cooling water can be applied only to the cooling module (100). In this case, it can be more constructable and economical than when an anti-corrosion coating is applied to the entire fixed mold (10) including the cooling module (100). The coating material used for the anti-corrosion coating can have corrosion resistance, contamination resistance, and anti-static performance. For example, the coating material can be a ceramic coating material containing aluminum oxide (Al2O3).

[0112] Meanwhile, an O-ring (100R) may be positioned between the first part (10P) and the second part (10Q), and may be mounted on the first part (10P) and / or the second part (10Q). The O-ring (100R) is a sealing material for waterproofing purposes and may include a material such as rubber, silicone, or urethane. The O-ring (100R) may extend along the circumference of the cooling module (100) and form a closed loop. The O-ring (100R) may prevent the cooling water of the cooling module (100) from leaking into the gap between the cooling module (100) and the second part (10Q).

[0113]

[0114] Referring to FIGS. 21 and 23, the surface of the groove (10G) of the fixed mold (10) may include a flat surface and / or a curved surface. The surface of the groove (10G) may be a complex surface having surfaces extending in different directions or having different curvatures. For example, the surface of the groove (10G) may include a first surface (10G1).

[0115] The first surface (10G1) may form at least a portion of the surface of the groove (10G). The first surface (10G1) may be referred to as a first groove (10G1). The first surface (10G1) may be flat or a curved surface that is slightly more curved than the flat surface. The first surface (10G1) may be parallel to a horizontal plane (xz plane of FIG. 21) or may be slightly inclined with respect to the horizontal plane.

[0116] The first slot (10S1) may be positioned corresponding to the first surface (10G1). The first slot (10S1) may be opposite the first surface (10G1). That is, a part of the first part (10P) forming the first surface (10G1) may be positioned between the bottom (10Sa) of the first slot (10S1) and the first surface (10G1). The bottom (10Sa) of the first slot (10S1) may extend along the first surface (10G1). Accordingly, the distance (D1) between the bottom (10Sa) of the first slot (10S1) and the first surface (10G1) may be constant or have a difference less than a certain level throughout the entire area of ​​the bottom (10Sa).

[0117] A first cooling module (1001) can be inserted into a first slot (10S1). A base (101) of the first cooling module (1001) can extend along a bottom (10Sa) of the first slot (10S1). A thickness (t1) of a body (104) forming the base (101) can be constant or have a difference less than a certain level throughout the entire area of ​​the base (101). The poles (102) of the first cooling module (1001) can protrude from the base (101) toward the bottom (10Sa) of the first slot (10S1) and can contact the bottom (10Sa). An end of the pole (102) can form a surface (e.g., a plane) that contacts the bottom (10Sa). That is, the pole (102) can be in surface contact with the bottom (10Sa). The cooling channel (103) of the first cooling module (1001) can be formed between the poles (102). That is, the cooling water of the first cooling module (1001) can flow on the bottom (10Sa) of the first slot (10S1).

[0118] Accordingly, the cooling water of the first cooling module (1001) can evenly cool the molded product (M) on the first surface (10G1) throughout the entire area of ​​the bottom (10Sa).

[0119]

[0120] Referring to FIGS. 21 and 24, the surface of the groove (10G) of the fixed mold (10) may include a flat surface and / or a curved surface. The surface of the groove (10G) may be a complex surface having surfaces extending in different directions or having different curvatures. For example, the surface of the groove (10G) may include a second surface (10G2).

[0121] The second surface (10G2) may form at least a portion of the surface of the groove (10G). The second surface (10G2) may be referred to as a second groove (10G2). The second surface (10G2) may be a plane or a curved surface extending in a different direction from the first surface (10G1). If the second surface (10G2) is a plane, an edge may be formed between the first surface (10G1) and the second surface (10G2). If both the second surface (10G2) and the first surface (10G1) are curved, the second surface (10G2) and the first surface (10G1) may have different curvatures. The curvature of the second surface (10G2) may be greater than the curvature of the first surface (10G1). Here, the curvature is the reciprocal of the radius of curvature. The second surface (10G2) can be formed to be inclined to the horizontal plane (xz plane of Fig. 21).

[0122] The second slot (10S2) may be positioned corresponding to the second surface (10G2). The second slot (10S2) may be opposite the second surface (10G2). That is, a part of the first part (10P) forming the second surface (10G2) may be positioned between the bottom (10Sa) of the second slot (10S2) and the second surface (10G2). The bottom (10Sa) of the second slot (10S2) may extend along the second surface (10G2). Accordingly, the distance (D2) between the bottom (10Sa) of the second slot (10S2) and the second surface (10G2) may be constant or have a difference less than a certain level in the entire area of ​​the bottom (10Sa). The distance (D2) may be equal to or similar to the distance (D1).

[0123] A second cooling module (1002) can be inserted into a second slot (10S2). A base (101) of the second cooling module (1002) can extend along a bottom (10Sa) of the second slot (10S2). A thickness (t2) of a body (104) forming the base (101) can gradually increase in the extending direction of the base (101). The poles (102) of the second cooling module (1002) can protrude from the base (101) toward the bottom (10Sa) of the second slot (10S2) and contact the bottom (10Sa). The ends of the poles (102) can form a surface (e.g., a curved surface or an inclined plane) that contacts the bottom (10Sa). That is, the poles (102) can be in surface contact with the bottom (10Sa). The cooling channel (103) of the second cooling module (1002) can be formed between the poles (102). That is, the cooling water of the second cooling module (1002) can flow on the bottom (10Sa) of the second slot (10S2).

[0124] Accordingly, the cooling water of the second cooling module (1002) can evenly cool the molded product (M) on the second surface (10G2) throughout the entire area of ​​the bottom (10Sa).

[0125]

[0126] Referring again to FIG. 21, a plurality of cooling modules (100) can be inserted into a plurality of slots (10S) of a fixed mold (10) and can evenly cool a molded product (M) on a groove (10G) forming a composite surface.

[0127]

[0128] Referring to FIG. 25, a plurality of cooling modules (100) may be arranged adjacent to each other. For example, the cooling module (100) may include first to sixth sides (100E1, 100E2, 100E3, 100E4, 100E5, 100E6).

[0129] The first side (100E1) and the second side (100E2) can form long sides of the cooling module (100). The third side (100E3) and the fourth side (100E4) can be short sides that connect the first side (100E1) and the second side (100E2) and form one end of a hexagon. The fifth side (100E5) and the sixth side (100E6) can be short sides that connect the first side (100E1) and the second side (100E2) and form one end of a hexagon.

[0130] Accordingly, the cooling module (100) may have a shape in which portions adjacent to the four corners of a long rectangle are cut out. In other words, the cooling module (100) may have an overall shape of a long hexagon.

[0131]

[0132] Referring to FIGS. 26 to 30, a plurality of cooling modules (100) may be arranged adjacent to each other. At least some of the plurality of cooling modules (100) may have different shapes. For example, the plurality of cooling modules (100) may include a first cooling module (1001), a second cooling module (1002), a third cooling module (1003), a fourth cooling module (1004), a fifth cooling module (1005), and a sixth cooling module (1006).

[0133] Referring to FIG. 27, the first cooling module (1001) may have a shape of a horizontally long octagon. That is, the first cooling module (1001) may include eight sides (100E1, 100E2, 100E3, 100E4, 100E5, 100E6, 100E7, 100E8). All interior angles of the shape formed by the body (104) of the first cooling module (1001) may be obtuse angles. That is, each side of the first cooling module (1001) may be connected to its adjacent side and form an obtuse angle. In other words, at each vertex of the shape formed by the first cooling module (1001), two sides may meet to form an obtuse angle.

[0134] The first cooling module (1001) can be positioned corresponding to the first part of the groove (10G) of the fixed mold (10). Cooling water of the first cooling module (1001) can cool the first part of the groove (10G) while flowing from the supply line (P1) to the discharge line (P2). A first O-ring (100R1, O-ring) mounted on the second part (10Q) of the fixed mold (10) can extend along the circumference of the first cooling module (1001) and can prevent the cooling water of the first cooling module (1001) from leaking into the gap between the first cooling module (1001) and the second part (10Q).

[0135] Referring to Fig. 27, the second cooling module (1002) may have a vertically elongated hexagonal shape. That is, the second cooling module may include six sides. All interior angles of the shape formed by the body (104) of the second cooling module (1002) may be obtuse angles. That is, each side of the second cooling module (1002) may be connected to its adjacent side to form an obtuse angle. In other words, at each vertex of the shape formed by the second cooling module (1002), two sides may meet to form an obtuse angle.

[0136] The second cooling module (1002) can be positioned corresponding to the second part of the groove (10G) of the fixed mold (10). Cooling water of the second cooling module (1002) can cool the second part of the groove (10G) while flowing from the supply line (P1) to the discharge line (P2). A second O-ring (100R2, O-ring) mounted on the second part (10Q) of the fixed mold (10) can extend along the periphery of the second cooling module (1002) and can prevent the cooling water of the second cooling module (1002) from leaking into the gap between the second cooling module (1002) and the second part (10Q).

[0137] Referring to Fig. 28, the third cooling module (1003) may have a shape that is a combination of a horizontally long octagon and a vertically long octagon. The third cooling module (1003) may have an L shape overall. The third cooling module (1003) may include 11 sides (100E1, 100E2, 100E3, 100E4, 100E5, 100E6, 100E7, 100E8, 100E9, 100E10, 100E11). All interior angles of the shape formed by the body (104) of the third cooling module (1003) may be obtuse angles. That is, each side of the third cooling module (1003) may be connected to its neighboring side by forming an obtuse angle. In other words, at each vertex of the shape formed by the third cooling module (1003), two sides can meet to form an obtuse angle.

[0138] The third cooling module (1003) can be positioned corresponding to the third portion of the groove (10G) of the fixed mold (10). The cooling water of the third cooling module (1003) can cool the third portion of the groove (10G) while flowing from the supply line (P1) to the discharge line (P2). The third O-ring (100R3, O-ring) mounted on the second part (10Q) of the fixed mold (10) can extend along the circumference of the third cooling module (1003) and can prevent the cooling water of the third cooling module (1003) from leaking into the gap between the third cooling module (1003) and the second part (10Q).

[0139] Referring to FIG. 28, the fourth cooling module (1004) may have a shape of a horizontally elongated octagon. The fourth cooling module (1004) may include eight sides (100E1, 100E2, 100E3, 100E4, 100E5, 100E6, 100E7, 100E8). All interior angles of the shape formed by the body (104) of the fourth cooling module (1004) may be obtuse angles. That is, each side of the fourth cooling module (1004) may be connected to its adjacent side by forming an obtuse angle. In other words, at each vertex of the shape formed by the fourth cooling module (1004), two sides may meet to form an obtuse angle.

[0140] The fourth cooling module (1004) may include a wall (105) protruding from the base (101) in the same direction as the poles (102). The connection portion between the base (101) and the wall (105) may be formed to be curved. The wall (105) may protrude from the inside of the body (104) forming one side (i.e., the right side) of the body (104) and may face the inside of the body (104) forming the other side (i.e., the left side) of the body (104). An end of the wall (105) may be spaced apart from the inside of the body (104) forming the other side. The end of the wall (105) may be a free end. Here, a side wall of a groove of the body (104) having the base (101) as a bottom may form the inside of the body (104). The wall (105) may contact the bottom (10Sa) of the slot (10S) into which the fourth cooling module (1004) is inserted, similar to the poles (102). The wall (105) may be extended horizontally and form a cooling channel (103) of the fourth cooling module (1004). That is, the cooling channel (103) of the fourth cooling module (1004) may be a U-shaped channel overall.

[0141] The fourth cooling module (1004) can be positioned corresponding to the fourth portion of the groove (10G) of the fixed mold (10). The cooling water of the fourth cooling module (1004) can cool the fourth portion of the groove (10G) while flowing from the supply line (P1) to the discharge line (P2). The fourth O-ring (100R4, O-ring) mounted on the second part (10Q) of the fixed mold (10) can extend along the circumference of the fourth cooling module (1004) and can prevent the cooling water of the fourth cooling module (1004) from leaking into the gap between the fourth cooling module (1004) and the second part (10Q).

[0142] Referring to FIG. 29, the fifth cooling module (1005) may have a shape in which a portion (1005C) of a horizontally long octagon is cut out. The fifth cooling module (1005) may include ten sides (100E1, 100E2, 100E3, 100E4, 100E5, 100E6, 100E7, 100E8, 100E9, 100E10). All interior angles of the shape formed by the body (104) of the fifth cooling module (1005) may be obtuse angles. That is, each side of the fifth cooling module (1005) may be connected to its adjacent side and form an obtuse angle. In other words, at each vertex of the shape formed by the fifth cooling module (1005), two sides may meet to form an obtuse angle.

[0143] The fifth cooling module (1005) may include a wall (106) protruding from the base (101) in the same direction as the poles (102). The connection portion between the base (101) and the wall (106) may be formed to be curved. The wall (106) may protrude from the inside of the body (104) forming one side (i.e., the left side) of the body (104) and may face the other side (i.e., the right side) of the body (104). An end of the wall (106) may be spaced apart from the inside of the body (104) forming the other side. The end of the wall (106) may be a free end. Here, a side wall of a groove of the body (104) having the base (101) as a bottom may form the inside of the body (104). The wall (106) may, like the poles (102), contact the bottom (10Sa) of the slot (10S) into which the fifth cooling module (1005) is inserted. The wall (106) may be extended horizontally and form a cooling channel (103) of the fifth cooling module (1005). That is, the cooling channel (103) of the fifth cooling module (1005) may be a U-shaped channel overall.

[0144] The fifth cooling module (1005) can be positioned corresponding to the fifth portion of the groove (10G) of the fixed mold (10). Cooling water of the fifth cooling module (1005) can cool the fifth portion of the groove (10G) while flowing from the supply line (P1) to the discharge line (P2). The fifth O-ring (100R5, O-ring) mounted on the second part (10Q) of the fixed mold (10) can extend along the circumference of the fifth cooling module (1005) and can prevent the cooling water of the fifth cooling module (1005) from leaking into the gap between the fifth cooling module (1005) and the second part (10Q).

[0145] Referring to FIG. 30, the sixth cooling module (1006) may have a shape in which a portion (1006C, 1006D) of a vertically elongated octagon is cut out. The sixth cooling module (1006) may include thirteen sides (100E1, 100E2, 100E3, 100E4, 100E5, 100E6, 100E7, 100E8, 100E9, 100E10, 100E11, 100E12, 100E13). All of the internal angles of the shape formed by the body (104) of the sixth cooling module (1006) may be obtuse angles. That is, each side of the sixth cooling module (1006) may be connected to its neighboring side by forming an obtuse angle. In other words, at each vertex of the shape formed by the sixth cooling module (1006), two sides can meet to form an obtuse angle.

[0146] The sixth cooling module (1006) may include walls (107, 108) protruding from the base (101) in the same direction as the poles (102). The connection portion of each of the walls (107, 108) and the base (101) may be formed to be curved. The first wall (107) may protrude from the inside of the body (104) forming one side (i.e., the upper side) of the body (104) and may face the inside of the body (104) forming the other side (i.e., the lower side) of the body (104). An end of the first wall (107) may be spaced apart from the inside of the body (104) forming the other side. The end of the first wall (107) may be a free end. The second wall (108) may protrude from the inside of the body (104) forming the side of the body (104) and may face the inside of the body (104) forming the side of the body (104). The end of the second wall (108) may be spaced apart from the inside of the body (104) forming the side. The end of the second wall (108) may be a free end. Here, the side wall of the groove of the body (104) having the base (101) as the bottom may form the inside of the body (104). The walls (107, 108) may, like the poles (102), contact the bottom (10Sa) of the slot (10S) into which the sixth cooling module (1006) is inserted. The walls (107, 108) may be extended vertically and spaced apart horizontally, and may form a cooling channel (103) of the sixth cooling module (1006). That is, the cooling channel (103) of the sixth cooling module (1006) may be an S-shaped channel overall.

[0147] The sixth cooling module (1006) can be positioned corresponding to the sixth portion of the groove (10G) of the fixed mold (10). The cooling water of the sixth cooling module (1006) can cool the sixth portion of the groove (10G) while flowing from the supply line (P1) to the discharge line (P2). The sixth O-ring (100R6, O-ring) mounted on the second part (10Q) of the fixed mold (10) can extend along the circumference of the sixth cooling module (1006) and can prevent the cooling water of the sixth cooling module (1006) from leaking into the gap between the sixth cooling module (1006) and the second part (10Q).

[0148] Accordingly, the fixed mold (10) can be equipped with a plurality of cooling modules (100) of various sizes and shapes, and each cooling module (100) can form a cooling channel (103) of various shapes to cool the molded product (M) on the groove (10G) of the fixed mold (10).

[0149]

[0150] Referring to FIGS. 1 to 30, a mold (10) having a heat transfer module (100) through which a fluid (C) flows may include: a molding surface (10G); and a slot (10S) positioned opposite the molding surface (10G), and the heat transfer module (100) may include: a base (101) inserted into the slot (10S); poles (102) protruding from the base (101) toward the bottom (10Sa) of the slot (10S); and a flow path (103) formed between the poles (102) and through which the fluid (C) flows, and the poles (102) may contact the bottom (10Sa) of the slot (10S).

[0151] The above poles (102) can be arranged to cross the flow direction of the fluid (C), and the flow of the fluid (C) can form turbulence.

[0152] The above poles (102) can form rows and columns, and the rows formed by the poles of odd columns among the poles can be arranged alternately with the rows formed by the poles of even columns among the poles.

[0153] The heat transfer module (100) may further include a wall (105; 106; 107; 108) protruding from the base (101) toward the bottom (10Sa) of the slot (10S) and contacting the bottom (10Sa), wherein the wall (105; 106; 107; 108) is elongated and positioned between the poles (102), and one end of the wall (105; 106; 107; 108) may be a fixed end, and the other end of the wall (105; 106; 107; 108) may be a free end.

[0154] The connection portion of the above pole (102) and the above base (101) can be formed in a curved shape.

[0155] The above pole (102) may include: a first part (1021a) having a cylindrical or truncated cone shape and contacting the bottom (10Sa) of the slot (10S); and a second part (1021b) that connects the first part (1021a) and the base (101) and is formed to be curved.

[0156] The end of the first part (1021a) can form a surface that comes into contact with the bottom (10Sa) of the slot (10S).

[0157] The above pole (102) may include: a top part (1023) having a cylindrical shape and contacting the bottom (10Sa) of the slot (10S); and a support part (1021) connecting the top part (1023) and the base (101) and having a hyperboloid shape.

[0158] The above mold (10) may further include: a first part (10P) having the molding surface (10G) and the slot (10S); and a second part (10Q) that covers the heat transfer module (100) inserted into the slot (10S) and is coupled to the first part (10P).

[0159] The above heat transfer module (100) can be sandwiched between the first part (10P) and the second part (10Q).

[0160] The above mold (10) may further include an O-ring (100R) positioned between the first part (10P) and the second part (10Q), extending along the perimeter of the heat transfer module (100), and forming a closed loop.

[0161] The above heat transfer module (100) can be internally coated.

[0162] The above slot (10S) may include a plurality of slots (10S) spaced apart from each other, and the heat transfer module (100) may include a plurality of heat transfer modules (100) inserted into the plurality of slots (10S).

[0163] The above molding surface (10G) may include: a first surface (10G1) forming a part of the above molding surface (10G); and a second surface (10G2) extending in a different direction or having a different curvature from the first surface (10G1), and the slot (10S) may include: a first slot (10S1) positioned opposite the first surface (10G1); and a second slot (10S2) positioned opposite the second surface (10G2), and the heat transfer module (100) may include: a first heat transfer module (1001) having poles (102) inserted into the first slot (10S1) and contacting a bottom (10Sa) of the first slot (10S1); And, it may include a second heat transfer module (1002) having poles (102) inserted into the second slot (10S2) and contacting the bottom (10Sa) of the second slot (10S2), wherein the bottom (10Sa) of the first slot (10S1) may extend along the first surface (10G1), and the bottom (10Sa) of the second slot (10S2) may extend along the second surface (10G2).

[0164] The above fluid (C) may be a coolant (C) and may cool the molding surface (10G).

[0165] A mold (10) having a cooling module (100) through which cooling water (C) flows may include: a molding surface (10G); and a slot (10S) positioned opposite the molding surface (10G), and the cooling module (100) may include: a base (101) inserted into the slot (10S); poles (102) protruding from the base (101) toward a bottom (10Sa) of the slot (10S); and a cooling channel (103) formed between the poles (102) and through which the cooling water (C) flows, and the poles (102) may contact the bottom (10Sa) of the slot (10S).

[0166] A fixed mold (10) having a cooling module (100) through which cooling water (C) flows may include: a molding surface (10G); and a slot (10S) positioned opposite the molding surface (10G), and the cooling module (100) may include: a base (101) inserted into the slot (10S); poles (102) protruding from the base (101) toward a bottom (10Sa) of the slot (10S); and a cooling channel (103) formed between the poles (102) and through which the cooling water (C) flows, and the poles (102) may contact the bottom (10Sa) of the slot (10S).

[0167] The above cooling module (100) can be coated with a ceramic coating material containing aluminum oxide.

[0168] The above cooling module (100) can be manufactured from steel having a carbon content of 45% or more.

[0169] An injection molding machine (1) may include: a fixed mold (10); a movable mold (20) that can move toward or away from the fixed mold (10); and a cavity (1C) between the fixed mold (10) and the movable mold (20).

[0170]

[0171] Any or all of the embodiments of the present disclosure described above are not mutually exclusive or distinct. Any or all of the embodiments of the present disclosure described above may have their respective components or functions combined or used together.

[0172] For example, it means that a configuration A described in a particular embodiment and / or drawing can be combined with a configuration B described in another embodiment and / or drawing. That is, even if a combination between configurations is not directly described, it means that a combination is possible, except in cases where a combination is described as impossible.

[0173] The above detailed description should not be construed as limiting in any respect and should be considered illustrative only. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are intended to be included within the scope of the present invention.

Claims

1. In a mold having a heat transfer module through which a fluid flows, The above mold: The molding surface; and, including a slot located opposite the above molding surface, The above heat transfer module: A base inserted into the above slot; Poles protruding from the base toward the bottom of the slot; and formed between the above poles and including a flow path through which the fluid flows, The above poles are a mold that contacts the bottom of the above slot.

2. In paragraph 1, The above poles are arranged so as to cross the flow direction of the fluid, The flow of the above fluid forms a turbulent mold.

3. In paragraph 1, The above poles form rows and columns, The rows formed by odd-numbered columns of the above poles are A mold in which the even rows of poles among the above poles are arranged alternately with the rows formed by them.

4. In paragraph 1, The above heat transfer module: Further comprising a wall protruding from the base toward the bottom of the slot and contacting the bottom, The above month is, It is extended long and located between the above poles, The first part of the above month is fixed, The other end of the above month is the free end mold.

5. In paragraph 1, The connection part between the above pole and the above base is, A mold that is formed in a curved shape.

6. In paragraph 5, The above pole is: A first part having a cylindrical or conical shape and contacting the bottom of the slot; and A mold that connects the first part and the base and includes a second part formed to be curved.

7. In paragraph 6, The end of the above first part is, A mold that forms a surface that contacts the bottom of the above slot.

8. In paragraph 5, The above pole is: A top part having the shape of a cylinder and contacting the bottom of the slot; and A mold that connects the top part and the base and includes a support part having a hyperboloid shape.

9. In paragraph 1, The above mold: A first part having the above-mentioned forming surface and the above-mentioned slot; and, A mold further comprising a second part that covers the heat transfer module inserted into the slot and is joined to the first part.

10. In paragraph 9, The above heat transfer module, A mold sandwiched between the first part and the second part.

11. In paragraph 9, A mold further comprising an O-ring positioned between the first part and the second part, extending along the perimeter of the heat transfer module, and forming a closed loop.

12. In paragraph 9, The above heat transfer module is a mold with an internal corrosion coating.

13. In paragraph 1, The above slot includes a plurality of slots spaced apart from each other, The above heat transfer module, A mold comprising a plurality of heat transfer modules inserted into the plurality of slots.

14. In paragraph 1, The above molding surface: A first surface forming a part of the above molding surface; and, comprising a second surface extending in a different direction from the first surface or having a different curvature; The above slots are: a first slot located opposite the first surface; and, comprising a second slot positioned opposite the second surface; The above heat transfer module: A first heat transfer module having poles inserted into the first slot and contacting the bottom of the first slot; and A second heat transfer module is inserted into the second slot and has poles that contact the bottom of the second slot, The bottom of the first slot extends along the first surface, The bottom of the second slot is a mold extending along the second surface.

15. In paragraph 1, The above fluid is, A mold that is a coolant and cools the above-mentioned molding surface.

16. In a mold having a cooling module through which cooling water flows, The above mold: The molding surface; and, including a slot located opposite the above molding surface, The above cooling module: A base inserted into the above slot; Poles protruding from the base toward the bottom of the slot; and A cooling channel formed between the above poles and through which the cooling water flows, The above poles are a mold that contacts the bottom of the above slot.

17. In a fixed mold having a cooling module through which cooling water flows, The above fixed mold: The molding surface; and, including a slot located opposite the above molding surface, The above cooling module: A base inserted into the above slot; Poles protruding from the base toward the bottom of the slot; and A cooling channel formed between the above poles and through which the cooling water flows, The above poles are fixed molds that contact the bottom of the above slot.

18. In paragraph 17, The above cooling module, A fixed mold coated with a ceramic coating containing aluminum oxide.

19. In paragraph 17, The above cooling module, A fixed mold manufactured from steel with a carbon content of at least 45%.

20. Fixed mold of Article 17; A movable mold capable of moving toward or away from the fixed mold; and, An injection molding machine comprising a cavity between the fixed mold and the movable mold.

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