Resin-molded products

Abstract

Invention details;

Description

resin molded products

[0001] The present disclosure relates to a resin molded article.

[0002] Japanese Patent Application Laid-Open No. 2019-181874 discloses a molding die comprising a first mold that molds the surfaces other than the fastening surface on one plate surface, and a second mold that molds the other plate surface of a foam resin molded product, a mold body that forms a cavity between the first mold and the second mold and is configured so that the volume of the cavity can be expanded by separating the first mold and the second mold, and an insert that molds corners and is assembled to the mold body so that a portion that molds the fastening surface and a portion that molds the end surface are exposed to the cavity, wherein the portion that molds the corners of the insert is made of a metal with a higher thermal conductivity than the mold body.

[0003] In the configuration described in JP 2019-181874 A, when viewed from the design surface side, the gate marks, which are the marks of the resin material injection port formed during molding, are visible, which may reduce the design.

[0004] The present disclosure aims to provide a resin molded product in which gate marks are not noticeable when the design surface is viewed.

[0005] Means for solving the above problems include the following embodiments. <1> A resin molded product comprising: a main body portion having a first design surface; and a protruding portion protruding from a peripheral edge of the main body portion to the opposite side of the first design surface in the thickness direction of the main body portion and outward from the main body portion, the protruding portion having a second design surface continuous with the first design surface, wherein the protruding portion has a tip portion in the protruding direction and a general portion between the tip portion and the main body portion, the outer surface of the tip portion being located inside the main body portion with respect to a demarcation line that defines the general portion and the tip portion, and a gate mark being formed on the tip portion. <2> The resin molded product described in <1>, wherein the demarcation line is a step extending from a second design surface of the general portion toward the inside of the main body portion. <3> The resin molded product described in <1>, wherein a parting line is formed on the demarcation line in the second design surface. <4> The resin molded product described in <1>, wherein the demarcation line is located 0.5 mm to 2.0 mm from the tip of the protruding portion. <5> The resin molded product according to any one of <1> to <4>, wherein a tip end of the protrusion has an arc shape. <6> The resin molded product according to any one of <1> to <5>, wherein an end of the gate mark is connected to an end of a surface of the protrusion opposite to the second design surface. <7> The resin molded product according to any one of <1> to <6>, wherein a first resin foam region is formed inside the main body, and a second resin foam region connected to the first resin foam region is formed inside the protrusion.

[0006] According to the present disclosure, it is possible to provide a resin molded product in which gate marks are not noticeable from a design perspective.

[0007] 1. A cross-sectional view showing a portion of a foamed resin molded product according to a first embodiment of the present disclosure. A cross-sectional view of a mold according to a first embodiment of the present disclosure. A cross-sectional view showing the periphery of a gate portion of the mold shown in FIG. 2. A cross-sectional view showing a state in which resin has been filled in the mold shown in FIG. 2. A cross-sectional view showing a state in which resin has been filled around the gate portion of the mold shown in FIG. 4. A cross-sectional view showing a state in which the movable mold has moved in the opening direction relative to the fixed mold in the mold shown in FIG. 4, and the resin has been foamed. A cross-sectional view showing a state in which the resin has been foamed around the gate portion of the mold shown in FIG. 6. A cross-sectional view showing a state in which the movable mold has moved in the opening direction and the foamed resin is removed from the mold shown in FIG. 6. A cross-sectional view showing a state in which the movable mold has moved in the opening direction and the foamed resin is removed from the mold shown in FIG. 8. A cross-sectional view showing a state in which the movable mold has moved in the opening direction and the foamed resin is removed from the mold of a comparative example. A cross-sectional view showing a state in which the movable mold has moved in the opening direction and the foamed resin is removed from the mold of a comparative example. 15 is a cross-sectional view showing a state in which a foamed resin molded article is visually observed, the foamed resin molded article being formed so that the protruding portion of the foamed resin molded article is gradually tapered toward the tip, around the gate portion of the mold according to the third embodiment of the present disclosure. FIG. 16 is a cross-sectional view showing a state in which a movable die is moved in the opening direction around the gate portion of the mold shown in FIG. 15 and a foamed resin molded article is removed. FIG. 17 is a cross-sectional view showing a state in which a foamed resin molded article is visually observed, the foamed resin molded article being formed so that the protruding portion of the foamed resin molded article is formed so that the protruding portion of the foamed resin molded article is gradually tapered toward the tip, around the gate portion of the mold shown in FIG. 16. FIG. 18 is a cross-sectional view showing a state in which a foamed resin molded article is visually observed, the foamed resin molded article being formed so that the protruding portion of the foamed resin molded article is formed flat, around the gate portion of the mold shown in FIG. 16.22 is a cross-sectional view showing the state in which the movable mold is moved in the opening direction around the gate portion of the mold shown in FIG. 21 and the foamed resin molded product is removed. FIG.

[0008] Hereinafter, embodiments for carrying out the present disclosure will be described in detail. However, the present disclosure is not limited to the following embodiments. In the following embodiments, components are not essential unless specifically stated. The same applies to numerical values ​​and their ranges, and do not limit the present disclosure.

[0009] The arrow X shown in each figure indicates the width direction of the resin molded product 70, and the arrow Y indicates the opening and closing direction, which is a direction intersecting the width direction of the resin molded product 70 and in which the movable mold 26 of the mold 10 opens and closes relative to the fixed mold 20.

[0010] [First embodiment] [Resin molded product 70] A resin molded product according to a first embodiment of the present disclosure includes a main body portion having a first design surface, and a protruding portion that protrudes from a peripheral edge of the main body portion to the outside of the main body portion on the opposite side of the first design surface in the thickness direction of the main body portion and that has a second design surface that is continuous with the first design surface, and a gate mark is formed at the tip of the protruding portion on the opposite side of the second design surface in the thickness direction of the protruding portion from the tip in the protruding direction. Specific examples of resin molded products will be described below with reference to the drawings, but the present disclosure is not limited thereto.

[0011] 1, the resin molded product 70 of this embodiment is a foamed resin molded product using foamed resin. The resin molded product 70 has a main body portion 72, a protruding portion 76, and a gate mark 80.

[0012] (Main body portion 72) The main body portion 72 is a flat plate-shaped portion extending in the X direction. This main body portion 72 extends in the X direction, and a protruding portion 76 extending outward in the X direction is formed at a peripheral edge portion 74 of the end in the X direction (the lower side in FIG. 1 ).

[0013] (Protruding portion 76) The protruding portion 76 extends in a protruding direction, which is a direction in which it protrudes from the peripheral edge portion 74. This protruding portion 76 has a general portion 78 and a tip portion 84. The tip portion 84 is the tip of the protruding portion 76 in the protruding direction. The general portion 78 is the portion from the tip portion 84 of the protruding portion 76 to the main body portion 72. The thickness of this general portion 78 may be constant in the protruding direction, or may increase or decrease.

[0014] The protruding direction of the protruding portion 76 is indicated by an arrow L in the figure. The thickness direction of the protruding portion 76, which is a direction perpendicular to the protruding direction of the protruding portion 76, is indicated by an arrow T. That is, the direction of arrow L in the present disclosure is inclined outward with respect to the X direction.

[0015] 1, the other side in the Y direction of the main body 72 (the left side in FIG. 1) is a first design surface 86A that forms part of the design surface of the resin molded product 70. Also, one side in the T direction of the protruding portion 76 (the lower left side in FIG. 1) is a second design surface 86B that forms part of the design of the resin molded product 70. The first design surface 86A and the second design surface 86B are continuous.

[0016] In addition, the surface of the protruding portion 76 opposite the second design surface 86B is referred to as the opposite surface.

[0017] (Foaming Region) The main body 72 of this embodiment has a first resin foaming region (hereinafter referred to as the "first foaming region") 88A inside it. The first foaming region 88A exists and extends in the X direction.

[0018] The protruding portion 76 of this embodiment has a second resin foaming region (hereinafter referred to as the "second foaming region") 88B therein. The second foaming region 88B may extend in the L direction. The first foaming region 88A and the second foaming region 88B may be connected or separated. In this embodiment, as shown in FIG. 1, the first foaming region 88A and the second foaming region 88B are connected.

[0019] The average diameter of the bubbles in the first foamed region 88A and the second foamed region 88B may be, for example, 0.02 mm or more and 0.15 mm or less.

[0020] In this embodiment, the second foaming region 88B is formed inside the protruding portion 86, but the present disclosure is not limited to this, and the second foaming region 88B does not have to be formed inside the protruding portion 86. Furthermore, the second foaming region 88B may be divided in the L direction of the protruding portion 86, and the foaming rate may be lower than that of the first foaming region 88A.

[0021] (Tip Portion 84) As shown in FIG. 1 , the tip portion 84 in this embodiment is a tip-side portion of the protruding portion 76 defined by the demarcation line D with respect to the general portion 78, and has a smaller thickness (thinner) than the general portion 78. The tip side of the tip portion 84 (one side in the direction of arrow L) is arc-shaped as shown in FIG. 1 and has a gate mark 80 formed during molding. The general portion 78 and the tip portion 84 of the protruding portion 76 in this embodiment are defined by a step S as shown in FIG. 1 . That is, the demarcation line D in this embodiment is the step S, and the tip portion 84 is a portion that is thinner (thinner) than the general portion 78 on one side of the step S in the direction of arrow L. Because the tip portion 84 has a smaller thickness (thinner) and is formed in the second cavity 64 of the mold 10, which experiences less volume expansion during core-back, the amount of foaming is small and deformation of the shape due to foaming is reduced. In this way, the thickness of the foamed region formed inside the tip 84 of the protrusion 76 is thinner than the foamed region formed inside the main body 72 and is smaller than the foamed region formed inside the general portion 78 of the protrusion 86.

[0022] In other words, in the present embodiment, the portion of the protruding portion 76 that is connected to the peripheral edge portion 74 of the main body portion 72 is the base end portion, and the opposite side is the tip end portion 84 .

[0023] (Gate Mark 80) The gate mark 80 is a portion formed in the injection molding process described below, and is a rough fracture surface formed by fracture of the resin material R. In this embodiment, the gate mark 80 is formed to include the tip of the arc-shaped tip portion 84 in the protruding direction. In other words, the gate mark 80 is parallel to the T direction, which is the thickness direction of the protruding portion 76, and is formed to include a point of contact with a tangent line F tangent to the tip portion 84 (the vertex of the tip portion 84). In other words, the gate mark 80 is formed in the tip portion 84 from one side in the T direction to the other side of the vertex that overlaps with the tangent line F facing the T direction. In other words, the gate mark 80 is formed on the tip portion 84 on the side opposite the second design surface 86B.

[0024] The length of the tip portion 84 in the direction of the arrow L may be, for example, 0.5 mm or more and 2.0 mm or less.

[0025] Furthermore, the step S is formed so as to overlap with a parting line PL formed during molding, as will be described later.

[0026] Next, the mold 10 used to manufacture the resin molded product 70 according to this embodiment and the manufacturing process will be described.

[0027] [Mold 10] A mold according to a first embodiment of the present disclosure includes a fixed mold serving as a first mold, a movable mold serving as a second mold that is movable relative to the fixed mold in an opening / closing direction and that forms, between the fixed mold and the movable mold, a first cavity that expands in a direction intersecting the opening / closing direction and a second cavity that extends from an end of the first cavity in the intersecting direction in an opening direction relative to the fixed mold, and that expands the volumes of the first cavity and the second cavity by moving in the opening direction, and a sliding mold that is movable relative to the fixed mold and forms an end of the second cavity in the opening direction and that maintains its position relative to the fixed mold in response to the movable mold's expansion of the volumes of the first cavity and the second cavity. Specific examples of the mold will be described below with reference to the drawings, but the present disclosure is not limited thereto.

[0028] 2 and 3 are views showing a portion of the mold 10 according to the first embodiment. This mold 10 includes a fixed mold 20, a movable mold 26, a first sliding mold 34, a second sliding mold 36, and a sliding core 56. Note that Figs. 2 and 3 each show a portion of the same mold 10 in the depth direction of the drawing. Note that the first sliding mold 34, the second sliding mold 36, and the sliding core 56 are examples of sliding molds according to the present disclosure.

[0029] (Fixed mold 20) The fixed mold 20 has a bottom portion 22 extending in the X direction, and a rising portion 24 rising from one side in the X direction of the bottom portion 22 (the lower side in the drawings in FIGS. 2 and 3) toward one side in the Y direction (the right side in the drawings in FIGS. 2 and 3). As shown in FIGS. 2 and 3, the fixed mold 20 has a concave shape formed by the bottom portion 22 and the rising portion 24. This fixed mold 20 is fixed to an injection molding apparatus (not shown).

[0030] (Movable mold 26) The movable mold 26 has a main body 72 extending in the X direction and a protruding portion 30 protruding from the inside of the main body 72 in the X direction to the other side in the Y direction (the left side in Figures 2 and 3). As shown in Figures 2 and 3, the movable mold 26 has a convex shape formed by the main body 72 and the protruding portion 30. The movable mold 26 is supported by an injection molding device (not shown) so as to be movable open and close in the Y direction. Note that Figures 2 and 3 show a portion of the same mold 10 in the depth direction of the drawings, and therefore the movable mold 26 in Figure 2 and the movable mold 26 in Figure 3 simultaneously move open and close in the Y direction. The movable mold 26 also has a stepped through-hole 32 with an expanded diameter on one side in the Y direction.

[0031] 2, the first sliding die 34 is disposed between the fixed die 20 and the movable die 26 so as to be surrounded by the movable die 26. The first sliding die 34 is separate from the movable die 26 and is movable in the Y direction at a different timing from the movable die 26.

[0032] 2, the first sliding die 34 is pressed against the fixed die 20 from one side in the Y direction by a push pin 40 when the movable die 26 is in contact with the fixed die 20 (die closed state). The push pin 40 is inserted from one side in the Y direction into a stepped through-hole 32 that penetrates the movable die 26 in the Y direction, and is movable in the Y direction.

[0033] The push pin 40 has a flange portion 40C on one side in the Y direction. When the movable mold 26 is in contact with the fixed mold 20 as shown in Figure 2, the movable mold 26 is pressed from one side in the Y direction by an injection molding device (not shown) via a biasing member 50. The biasing member 50 is, for example, a coil spring. In addition, in the state shown in Figure 2, i.e., when the fixed mold 20 and the movable mold 26 are in contact, the length by which the biasing member 50 is compressed from its natural length is longer than the length of movement in the volume expansion operation described below.

[0034] (Second sliding die 36) The second sliding die 36 is another example of a sliding die according to the present disclosure, and as shown in Fig. 3, is disposed between the fixed die 20 and the movable die 26 so as to be surrounded by the movable die 26. The second sliding die 36 is separate from the movable die 26, and is movable in the Y direction at a different timing from the movable die 26. In this embodiment, the first sliding die 34 and the second sliding die 36 are separate from each other in the depth direction of the paper in Figs. 2 and 3 .

[0035] An angular pin 38 is fixed to one side in the Y direction of the second sliding die 36. This angular pin 38 penetrates the movable die 26 while extending in the Y direction and tilting in the X direction.

[0036] The second slide die 36 is also provided with a stepped through-hole 44 whose diameter is enlarged on one side in the Y direction.

[0037] (Slide core 56) As shown in Fig. 3, the slide core 56 is disposed between the fixed die 20 and the second slide die 36 and comes into contact with the fixed die 20. The slide core 56 also has a gate 58 that opens toward the other side in the Y direction and a flow path C that connects the gate 58 to an injection molding device (not shown). The flow path C connects in the depth direction of the paper in Fig. 3.

[0038] The slide core 56 has a push pin 42 fixed to one side in the Y direction. The push pin 42 has a flange portion 42C on one side in the Y direction that has a diameter larger than the reduced-diameter portion 44B of the stepped through-hole 44. The flange portion 42C of the push pin 42 is located inside the expanded-diameter portion 44A of the stepped through-hole 44 of the second slide die 36 when the movable die 26 is in contact with the fixed die 20 as shown in FIG. 3 .

[0039] 3, when the movable die 26 is in contact with the fixed die 20, the slide core 56 is pressed against the fixed die 20 by the second slide die 36 via the biasing member 50. The biasing member 50 is, for example, a coil spring. The surface where the fixed die 20 and the slide core 56 contact is referred to as a parting surface 68. In addition, in the state shown in FIG. 3, i.e., when the fixed die 20 and the movable die 26 are in contact, the length by which the biasing member 50 is compressed from its natural length is longer than the length of movement in the volume expansion operation described below.

[0040] 2 and 3 , when the fixed die 20 and the movable die 26 are in contact with each other, a cavity 60 is formed by the fixed die 20, the movable die 26, the first sliding die 34, the second sliding die 36, and the sliding core 56. The cavity 60 has a first cavity 62 and a second cavity 64.

[0041] 2 and 3, the first cavity 62 of the cavity 60 extends in the X direction and constitutes the majority of the resin molded product 70 in the X direction. The second cavity 64 extends from one end of the first cavity 62 in the X direction toward one side in the X direction and one side in the Y direction (the lower right side in FIGS. 2 and 3). In other words, the Y direction is also the opening / closing direction in the present disclosure.

[0042] As will be described later, in the present disclosure, the resin molded product 70 formed by injecting the resin material R into the cavity 60 has a design surface on the side that contacts the fixed mold 20. That is, the resin material R injected into the first cavity 62 becomes the main body portion 72 having the first design surface 86A, and the resin material R injected into the second cavity 64 becomes the protruding portion 76 having the second design surface 86B.

[0043] As shown in FIG. 2, in this embodiment, a step 66 is formed in the T direction at the tip of the second cavity 64 between the rising portion 24 of the fixed die 20 and the first sliding die 34 .

[0044] 2, in this embodiment, the step S in the resin molded product 70 becomes a demarcation line D that demarcates the general portion 78 and the tip portion 84 in the protruding portion 76 of the resin molded product 70. That is, in this embodiment, the surface where the fixed mold 20 and the first sliding mold 34 contact each other is also the portion where the demarcation line D in the resin molded product 70 is formed.

[0045] 2, in this embodiment, at the surface where the fixed mold 20 and the first sliding mold 34 come into contact, the resin material R seeps out during injection (referred to later) of the resin, and a parting line PL, which is a linear protrusion, is formed when viewed from the second design surface 86B side. That is, in this embodiment, the surface where the fixed mold 20 and the first sliding mold 34 come into contact is also the portion where the parting line PL is formed in the resin molded product 70.

[0046] 3, in this embodiment, a step 66 is formed in the T direction at the tip of the second cavity 64 between the rising portion 24 of the fixed mold 20 and the slide core 56. This step 66 is positioned more inward in the X direction on the slide core 56 side at the parting surface 68. In other words, a step S of the protruding portion 76 is formed by the fixed mold 20 and the slide core 56. That is, the T direction is also a direction that intersects with the opening and closing direction in this disclosure.

[0047] 3, in this embodiment, the step S in the resin molded product 70 becomes a demarcation line D that demarcates the general portion 78 and the tip end portion 84 in the protruding portion 76 of the resin molded product 70. That is, in this embodiment, the surface where the fixed mold 20 and the slide core 56 contact each other is also the portion where the demarcation line D in the resin molded product 70 is formed.

[0048] 3, in this embodiment, at the surface where the fixed mold 20 and the slide core 56 come into contact, the resin material R seeps out during resin injection, which will be described later, and a parting line PL, which is a linear protrusion, is formed on the second design surface 86B side. That is, in this embodiment, the surface where the fixed mold 20 and the slide core 56 come into contact is also the portion where the parting line PL is formed in the resin molded product 70.

[0049] In this embodiment, the tip portion 65 of the second cavity 64 is formed in an arc shape as shown in FIGS.

[0050] 3, in this embodiment, the gate 58 of the slide core 56 is located near the tip of the second cavity 64. In other words, the fixed mold 20 and the slide core 56 form a gate mark 80 on the tip side of the step S of the protruding portion 76. In other words, the fixed mold 20 and the slide core 56 form the gate mark 80 on the opposite side of the second design surface 86B in the thickness direction of the protruding portion 76.

[0051] (Volume Expansion Operation) As will be described later, the mold 10 according to the present disclosure allows the movable die 26 to move slightly in the Y direction when the resin material R has been injected into the cavity 60. That is, the mold 10 according to the present disclosure performs a volume expansion operation of the cavity 60, known as core back, by moving the movable die 26 in the opening and closing direction. Furthermore, in the mold 10 according to the present disclosure, when the resin material R is injected into the cavity 60 and the volume of the cavity 60 expands, the resin material R in the cavity 60 foams. Note that the surface of the resin material R that comes into contact with the mold is likely to cool and solidify (harden), so when core back occurs, the resin material R is less likely to foam on the surface, but foams internally. The surface portion of a resin molded product with a small amount of foaming is generally referred to as the skin region. Furthermore, depending on the opening direction of the movable mold 26, the expansion rate of the second foaming region 88B tends to be lower than the expansion rate of the first foaming region 88A because the expansion rate of the second cavity 64 (the cavity that molds the protruding portion 76) is smaller than the expansion rate of the first cavity 62. Furthermore, the protruding portion 76 may have a larger proportion of the skin region than the main body portion 72.

[0052] The "slight" movement length may be set to 1.5 mm, for example.

[0053] (Resin Material) The resin material R is preferably a resin material R containing a resin and a foaming agent, and may contain other components such as additives as necessary.

[0054] Examples of resins used for the resin material R include at least one selected from the group consisting of polyethylene resins, polypropylene resins (PP), composite polypropylene resins (PPC), polystyrene resins, polyethylene terephthalate resins, polyvinyl alcohol resins, vinyl chloride resins, ionomer resins, polyamide resins, acrylonitrile-butadiene-styrene copolymer resins (ABS), polycarbonate resins, and polyphenylene sulfide resins (PPS). Among these, at least one selected from the group consisting of polypropylene resins (PP), composite polypropylene resins (PPC), and acrylonitrile-butadiene-styrene copolymer resins (ABS) is preferred.

[0055] Examples of foaming agents include organic foaming agents such as azodicarbonamide, and inorganic foaming agents such as sodium hydrogen carbonate (also known as sodium bicarbonate or baking soda). In foam molding of automotive interior parts, organic foaming agents are preferred from the viewpoints of improving environmental test performance and coating film performance (hot water resistance, etc.).

[0056] Examples of organic foaming agents include azodicarbonamide (ADCA), N,N-dinitrosopentamethylenetetramine (DPT), 4,4'-oxybisbenzenesulfonylhydrazide (OBSH), and hydrazodicarbonamide (HDCA), with azodicarbonamide (ADCA) being preferred. In particular, when manufacturing exterior components, it is preferable to use azodicarbonamide (ADCA), whose decomposition products contain almost no water.

[0057] The content of azodicarbonamide (ADCA) in the total amount of the blowing agent is preferably 50% by mass or more, more preferably 80% by mass or more, even more preferably 90% by mass or more, and particularly preferably 95% by mass or more.

[0058] The decomposition temperature of the blowing agent is preferably 50° C. or higher and 250° C. or lower, and more preferably 50° C. or higher and 220° C. or lower. Depending on the form of use, the decomposition temperature of the blowing agent may be 130° C. or higher and 250° C. or lower.

[0059] (Injection Molding Process) Next, the injection molding process in this embodiment will be described with reference to FIGS. 4 to 9 as needed.

[0060] First, as shown in Figures 4 and 5, with the fixed mold 20 and the movable mold 26 in contact with each other, molten resin material R flows from an injection molding device (not shown) through the flow path C and the gate 58 into the cavity 60. Note that, when the fixed mold 20 and the movable mold 26 are in contact with each other as shown in Figure 4, the first slide mold 34 is in contact with the fixed mold 20, so that a tip portion 65 of the second cavity 64 is formed. Also, when the fixed mold 20 and the movable mold 26 are in contact with each other as shown in Figure 5, the slide core 56 is in contact with the fixed mold 20, so that a tip portion 65 of the second cavity 64 is formed.

[0061] When a predetermined time has elapsed since the resin material R was injected into the cavity 60, the resin material R is cooled and hardened from the outside of the cavity 60 (the portions in contact with the fixed mold 20, the movable mold 26, the first slide mold 34, and the slide core 56). When the outside of the cavity 60 begins to harden, the movable mold 26 performs a volume expansion operation and assumes the state shown in FIGS.

[0062] 6 and 7 , when the movable mold 26 performs the volume-expanding operation, the volume inside the cavity 60 is expanded, and therefore the pressure inside the cavity 60 is reduced. In this state, the resin material R is foamed inside the first cavity 62 and the second cavity 64 by the foaming agent mixed with the resin material R.

[0063] 6 , when the movable mold 26 has performed the volume-expanding operation, the first slide mold 34 maintains its relative position with respect to the fixed mold 20 by the push pin 40 pressed by the biasing member 50. In other words, even when the movable mold 26 has performed the volume-expanding operation, the tip portion 65 of the cavity 60 formed by the first slide mold 34 maintains the shape it had before the volume-expanding operation. Therefore, because the amount of resin foaming inside the tip portion 84 of the molded resin molded product 70 is small, deformation of the tip portion 84 due to foaming is suppressed.

[0064] 7, when the movable die 26 has performed the volume-expanding operation, the slide core 56 is pressed by the biasing member 50, thereby maintaining the relative position with respect to the fixed die 20. In other words, even when the movable die 26 has performed the volume-expanding operation, the tip portion 65 of the cavity 60 formed by the slide core 56 maintains the shape it had before the volume-expanding operation.

[0065] Then, the resin material R in the cavity 60 is further cooled, and when the entire resin material R is hardened, the movable mold 26 moves further in the Y direction to reach the state shown in FIGS.

[0066] 8, when the movable die 26 moves further to one side in the Y direction than when it has performed the volume expanding operation, the biasing member 50 extends to its natural length, and the biasing member 50 no longer presses the push pin 40. Furthermore, when the flange portion 40C of the push pin 40 gets caught in the stepped through-hole 32 of the movable die 26, the first sliding die 34 moves to one side in the Y direction together with the movable die 26. As a result, contact between the first sliding die 34 and the fixed die 20 is released, as shown in FIG.

[0067] 9, when the movable die 26 moves further in one direction in the Y direction than when it has performed the volume expansion operation, the biasing member 50 extends to its natural length, and the pressing force of the biasing member 50 is released. Furthermore, the angular pin 38 of the second sliding die 36 is guided to one side in the X direction by the through-hole of the movable die 26 that moves to one side in the Y direction. As a result, the second sliding die 36 and the slide core 56 move to one side in the X direction.

[0068] 9, the slide core 56 is further moved to one side in the X direction, whereby the cured resin material R is cut at the gate 58. As a result, a rough fracture surface, so-called a gate mark 80, is formed at the position of the cut mark, which corresponds to the gate 58 at the tip 84 of the cavity 60 as shown in FIG.

[0069] Then, the movable mold 26 is further moved to one side in the Y direction relative to the fixed mold 20, and the hardened resin material R is removed from the fixed mold 20 as a resin molded product 70 as shown in Fig. 1. As described above, in the resin molded product 70 of this embodiment, the portion of the cavity 60 that was in contact with the fixed mold 20 is the design surface as shown in Fig. 1.

[0070] Comparative Example FIGS. 10 and 11 show a mold 110, which is a comparative example of the mold 10 according to this embodiment, undergoing a volume expansion operation similar to that of the mold 10 according to this embodiment.

[0071] 10 , in the mold 110 according to the comparative example, the portion corresponding to the first slide die 34 according to the present embodiment is part of the movable die 125. In other words, in a state where the volume expansion operation is performed, the tip portion 65 of the second cavity 64 moves together with the movable die 125 to one side in the Y direction.

[0072] 11 , in the mold 110 according to the comparative example, the portions corresponding to the second slide die 36 and the slide core 56 are integrally formed as a slide die 130. Unlike the slide core 56 according to this embodiment, the slide die 130 is not biased toward the fixed die 120, and is therefore not in contact with the fixed die 120 when the volume expansion operation is performed. In other words, when the volume expansion operation is performed, the tip portion 65 of the second cavity 64 moves to one side in the Y direction together with the movable die 125.

[0073] 10 and 11 , when the movable die 125 performs the volume expansion operation, the tip of the second cavity 64 is pulled by the movable die 125 and the sliding die 130 and moves to one side in the Y direction. Because the resin material R has not yet hardened at the time of the volume expansion operation, the boundary portion between the bottom 22 of the cavity 60 and the second cavity 64 deforms toward one side in the Y direction. This deformation of the boundary portion reduces the design quality of the design surface of the resin molded product 70.

[0074] (Operations and Effects) The mold 10 of this embodiment and the resin molded product 70 formed by the mold 10 can provide the following operations and effects.

[0075] In the mold 10 of this embodiment, the sliding die is pressed against the fixed die 20 near the tip of the second cavity 64 in the opening / closing direction, and forms the tip of the second cavity 64 in the cavity 60 in the opening / closing direction, and when the movable die 26 moves in the opening / closing direction, it maintains a state of being pressed against the fixed die 20. As a result, when the movable die 26 expands the volume of the cavity 60, the sliding die that forms the tip of the second cavity 64 does not move, and therefore, when the movable die 26 moves in the opening / closing direction, the design surface from the first cavity 62 to the second cavity 64 is less likely to deform.

[0076] Therefore, the mold 10 in this embodiment can reduce the possibility that the design surface will be deformed when forming the resin molded product 70, thereby impairing the design of the design surface in the formed resin molded product 70.

[0077] Furthermore, in the mold 10 of this embodiment, when the movable mold 26 expands the volume of the cavity 60, the sliding mold is pressed against the fixed mold 20. As a result, in the mold 10 of this embodiment, the possibility of the tip of the protruding portion 76 being deformed can be reduced compared to when the sliding mold is not pressed against the fixed mold 20.

[0078] Furthermore, in the mold 10 of this embodiment, the sliding die is pressed against the fixed die 20 by a biasing member 50 provided on the movable die 26. Therefore, when the gap between the fixed die 20 and the movable die 26 is narrow, the sliding die is pressed against the fixed die 20, and when the gap between the fixed die 20 and the movable die 26 is wide, the sliding die is no longer pressed against the fixed die 20. This simplifies the configuration of the mold 10 of this embodiment, which can reduce the possibility of impairing the design of the design surface.

[0079] Furthermore, in the mold 10 of this embodiment, the sliding mold has a gate 58 that injects resin from the leading end of the second cavity 64 in the opening / closing direction, and is movable outward in the intersecting direction relative to the fixed mold 20. This makes it difficult for a person looking at the design surface of the resin molded product 70 molded using the mold 10 of this embodiment to see the gate marks 80.

[0080] Therefore, it is possible to reduce the possibility that the design of the design surface of the resin molded product 70 formed by the mold 10 of this embodiment will be impaired.

[0081] Furthermore, since the resin molded product 70 in this embodiment is formed using the mold 10 in this embodiment, the design surface is less likely to deform from the main body portion 72, which is the portion corresponding to the first cavity 62, to the protrusion portion 76, which is the portion corresponding to the second cavity 64.

[0082] Therefore, the resin molded product 70 in this embodiment can reduce the possibility of the design of the design surface being impaired compared to a resin molded product 70 formed without using the mold 10 in this embodiment.

[0083] Furthermore, in the resin molded product 70 of this embodiment, the tip 84 of the protruding portion 76 has a gate mark 80 formed on the second design surface 86B side in the thickness direction of the tip 84 of the protruding portion 76, and the tip 84 is formed more inward of the main body portion 72 than the demarcation line D that demarcates the general portion 78 and the tip 84. In other words, the gate mark 80 on the opposite side of the second design surface 86B from the general portion 78 on the second design surface 86B is easily blended into the demarcation line D, and therefore the gate mark 80 is not noticeable to someone looking at the design surface. Therefore, in the resin molded product 70 of this embodiment, the gate mark 80 is not noticeable on the design surface, reducing the possibility of impairing the design of the design surface.

[0084] Furthermore, in the resin molded product 70 of this embodiment, the demarcation line D is a step S that is directed more inwardly toward the main body portion 72 than the second design surface 86B of the general portion 78. As a result, in the resin molded product 70, the demarcation line D is a step S, and the parting line PL is not noticeable to a person looking at the design surface, reducing the possibility that the design of the design surface will be impaired.

[0085] Furthermore, in the resin molded product 70 of this embodiment, a parting line PL is formed on the demarcation line D on the second design surface 86B.

[0086] Furthermore, in the resin molded product 70 of this embodiment, a parting line PL is formed on the demarcation line D, which is the boundary between the general portion 78 and the tip portion 84, and since the parting line PL is not noticeable to a person looking at the design surface, the possibility of impairing the design of the design surface is reduced.

[0087] Furthermore, in the resin molded product 70 of this embodiment, the parting line PL is located at a position 0.5 mm to 2.0 mm from the tip of the protruding portion 76, and the parting line PL is not noticeable to a person looking at the design surface, thereby reducing the possibility that the design of the design surface will be impaired.

[0088] Furthermore, in the resin molded product 70 of this embodiment, the tip end 84 has an arc shape, which makes it easier for the gate mark 80 to be small during molding. Therefore, in the resin molded product 70 of this embodiment, the gate mark 80 is smaller than when the tip end 84 is not arc-shaped, which reduces the possibility of impairing the design of the design surface.

[0089] Furthermore, in the resin molded product 70 of this embodiment, the end of the gate mark 80 connects to the end of the surface of the protruding portion 76 opposite the second design surface 86B, making it difficult for a person looking at the design surface to see the gate mark 80. Therefore, in the resin molded product 70 of this embodiment, the gate mark 80 is less noticeable than in a case where the end of the gate mark 80 is not connected to the end of the surface of the protruding portion 76 opposite the second design surface 86B, reducing the possibility that the design of the design surface will be impaired.

[0090] Furthermore, since the resin molded product 70 of this embodiment has the first foamed region 88A and the second foamed region 88B formed therein, the weight of the resin molded product can be reduced.

[0091] In the resin molded product 70 of this embodiment, the gate mark 80 is formed at the tip 84 of the protrusion portion 76, in a part opposite the second design surface 86B in the thickness direction of the protrusion portion 76 from the tip in the protrusion direction, so that the gate mark 80 is difficult to see for a person looking at the design surface.

[0092] Therefore, in the resin molded product 70 of this embodiment, the gate marks 80 are difficult to see on the design surface, reducing the possibility that the design of the design surface will be impaired.

[0093] Furthermore, in the resin molded product 70 of this embodiment, the tip end 84 has an arc shape, so the gate mark 80 is likely to be small during molding. Therefore, in the resin molded product 70 of this embodiment, the gate mark 80 is less visible than in a case where the tip end 84 is not arc-shaped, reducing the possibility of impairing the design of the design surface.

[0094] Furthermore, in the resin molded product 70 of this embodiment, the end of the gate mark 80 connects to the end of the surface of the protruding portion 76 opposite the second design surface 86B, making it difficult for a person looking at the design surface to see the gate mark 80. Therefore, in the resin molded product 70 of this embodiment, the gate mark 80 is less visible than in a case where the end of the gate mark 80 is not connected to the end of the surface of the protruding portion 76 opposite the second design surface 86B, reducing the possibility that the design of the design surface will be impaired.

[0095] Furthermore, since the resin molded product 70 in this embodiment has the first foamed region 88A and the second foamed region 88B formed therein, the weight of the resin molded product 70 can be reduced.

[0096] (Modification) In the above description, the first slide die 34 and the second slide die 36 are separate bodies, but this is not limited to this. For example, instead of being supported by the angular pin 38 relative to the movable die 26, the second slide die 36 may be pressed against the fixed die 20 by a push pin 40, similar to the first slide die 34. In this case, the first slide die 34 and the second slide die 36 may be formed as a single body.

[0097] In addition, in the above description, the slide core 56 is separate from the second slide mold 36, but this is not limited to this, and the second slide mold 36 and the slide core 56 may be integrated into one body.

[0098] Even in such a case, if the movable mold 26 expands in volume and the part corresponding to the first slide mold 34 and the slide core 56 is in contact with the fixed mold 20 when the resin material R foams, the same action and effect as the mold 10 of the first embodiment can be obtained.

[0099] Furthermore, in the above description, in the resin molded product 70 of this embodiment, the demarcation line D and the parting line PL overlap, but this is not limiting, and the demarcation line D and the parting line PL may be configured so as not to overlap. In this case, it is desirable that the parting line PL is formed closer to the tip of the demarcation line D in the resin molded product. This makes the parting line PL less noticeable due to the demarcation line D and the step S, reducing the possibility of impairing the design of the design surface.

[0100] In the above description, the present embodiment has used the resin molded product 70 having a foamed region therein as an example of a resin molded product, but the technology of the present disclosure is not limited to this. That is, the present disclosure is similarly applicable to resin molded products that do not have foamed regions in the main body portion 72 and the protruding portion 76. Even in this case, as with the resin molded product 70 of the present embodiment, the gate marks 80 are not noticeable on the design surface to a person looking at the design surface, reducing the possibility of the design of the design surface being impaired. Also, as with the resin molded product 70 of the present embodiment, the gate marks 80 are not easily visible on the design surface to a person looking at the design surface, reducing the possibility of the design of the design surface being impaired.

[0101] Next, a second embodiment of the present disclosure will be described with appropriate reference to Figures 12 and 13. Note that, among the configurations according to this embodiment, configurations that are similar to those of the first embodiment will be assigned the same reference numerals, and specific descriptions thereof may be omitted.

[0102] 12 shows a state in which a mold 10 according to a second embodiment has performed a volume-expanding operation. In the mold 10 according to this embodiment, a slide actuator 54 is connected to the slide core 56 from one side in the Y direction, penetrating the movable mold 26. That is, in this embodiment, the slide core 56 is pressed against the fixed mold 20 by the slide actuator 54 when the mold 10 has performed a volume-expanding operation.

[0103] The other configurations are the same as those of the first embodiment.

[0104] 13, in the mold 10 of this embodiment, when the fixed die 20 moves further to one side in the Y direction than when the volume expanding operation is performed, the slide core 56 is guided to one side in the X direction together with the second slide die 36. As a result, also in this embodiment, the movable die 26 separates from the fixed die 20, and the resin material R is cut at the gate 58.

[0105] 12 , in this embodiment, the slide mold is pressed against the fixed mold 20 by the slide actuator 54, not by the biasing member 50, when the movable mold 26 performs the volume expansion operation. In other words, in this embodiment as well, the slide mold is not released from contact with the fixed mold 20 at the time of the volume expansion operation. As a result, in this embodiment as well, when the movable mold 26 expands the volume of the cavity 60, the slide mold that forms the tip of the second cavity 64 does not move, and therefore, when the movable mold 26 moves in the opening / closing direction, the design surface from the first cavity 62 to the second cavity 64 is less likely to deform.

[0106] Therefore, even with the mold 10 of this embodiment, the design surface is deformed when forming the resin molded product 70, reducing the possibility that the design of the design surface in the formed resin molded product 70 will be impaired.

[0107] The other actions and effects obtained by the mold 10 in the first embodiment can also be obtained in this embodiment.

[0108] Next, a third embodiment of the present disclosure will be described with appropriate reference to Figures 14 to 16. Note that, among the configurations according to this embodiment, configurations that are similar to those of the first embodiment will be assigned the same reference numerals, and specific descriptions thereof may be omitted.

[0109] Third Embodiment (Resin Molded Product 70) FIG. 14 is a diagram illustrating a resin molded product 70 according to a third embodiment. In this embodiment, unlike the resin molded product 70 according to the first embodiment, the tip 284 of the protruding portion 76 does not have a step S but has a tapered portion 92. Furthermore, in the resin molded product 70 according to this embodiment, the gate mark 80 is formed on one side of the apex on one side in the direction of arrow L within the range of the tip 284 in the direction of arrow T. In other words, in this embodiment, the gate mark 80 is parallel to the direction of arrow T, which is the thickness direction of the protruding portion 276, and is formed on one side of the point of contact with the tangent line F tangent to the tip 284 (the apex of the tip 284). In other words, in the resin molded product 70 according to this embodiment, the gate mark 80 is not formed on the other side of the apex on one side in the direction of arrow L within the range of the tip 284 in the direction of arrow T.

[0110] 14 , the gradually tapering portion 92 is a portion whose thickness decreases from the parting line PL, which is the demarcation line D that defines the general portion 78 and the tip portion 284, toward one side in the direction of arrow L and toward the other side in the direction T (toward the inside of the main body portion 72). In other words, the gradually tapering portion 92 in this embodiment gradually reduces the thickness of the protruding portion 76 by changing the thickness in the direction T, similar to the step S in the first embodiment.

[0111] The shapes of other parts are similar to those of the resin molded product 70 according to the first embodiment.

[0112] Next, the mold 10 for manufacturing the resin molded product 70 according to this embodiment will be described.

[0113] 15 is a diagram showing the mold 10 according to this embodiment. In the mold 10 according to this embodiment, one side in the direction of arrow L from the parting surface 68 where the fixed mold 20 and the slide core 56 come into contact is formed as an inclined portion 266 in which the thickness of the protruding portion 76 decreases from one side in the direction of arrow L to the other side in the direction of arrow T.

[0114] 15 , in the mold 10 of this embodiment, the gate 258 is located on one side in the direction T of the cavity 60, farther than on the extreme side in the direction of arrow L. In other words, in this embodiment, the gate 258 is located between the tapered portion 92 and the tip portion 265 of the cavity 60.

[0115] The other configurations are the same as those of the first embodiment.

[0116] In this embodiment, as shown in FIG. 16, when the slide core 56 moves to one side in the X direction, the hardened resin material R is cut at the gate 258, and a gate mark 80 is formed in the resin molded product 70.

[0117] 15, in the present embodiment, when the movable die 26 performs the volume expansion operation, the slide core 56 and the fixed die 20 are kept in contact with each other. As a result, similar to the first embodiment, the design surface is deformed when the resin molded product 70 is formed, and the possibility of impairing the design of the design surface of the formed resin molded product 70 can be reduced.

[0118] 14 , in this embodiment, the gate mark 80 has a gate mark 80 formed at the tip 284 of the protruding portion 76 on the second design surface 86B side in the thickness direction at the tip 284 of the protruding portion 76, and the tip 284 is formed inside the main body portion 72 relative to the demarcation line D that demarcates the general portion 78 and the tip 284. In other words, the gate mark 80 on the opposite side of the second design surface 86B from the general portion 78 on the second design surface 86B is easily blended into the demarcation line D, and therefore is not noticeable to someone looking at the design surface. As a result, the gate mark 80 in the formed resin molded product 70 is not noticeable on the design surface, reducing the possibility of impairing the design of the design surface.

[0119] The other actions and effects obtained by the mold 10 in the first embodiment can also be obtained in this embodiment.

[0120] Next, a fourth embodiment of the present disclosure will be described with appropriate reference to Figures 17 to 19. Note that, among the configurations according to this embodiment, configurations similar to those of the first embodiment will be denoted by the same reference numerals, and specific descriptions thereof may be omitted.

[0121] [Fourth Embodiment] (Resin Molded Product 70) FIG. 17 is a diagram illustrating a resin molded product 70 according to a fourth embodiment. In this embodiment, compared to the resin molded product 70 according to the first embodiment, at a tip end 384 of a protruding portion 76, a gate mark 80 is formed on the other side of the apex on one side in the direction of arrow L within a range in the direction T at the tip end 384. In other words, in this embodiment, the gate mark 80 is parallel to the direction T, which is the thickness direction of the protruding portion 376, and is formed on the other side of the direction T at a point of contact with a tangent line F tangent to the tip end 384 (the apex of the tip end 384). In other words, in the resin molded product 70 according to this embodiment, the gate mark 80 is not formed on the one side of the apex on one side in the direction of arrow L within a range in the direction T at the tip end 384.

[0122] The shapes of other parts are similar to those of the resin molded product 70 according to the first embodiment.

[0123] Next, the mold 10 for manufacturing the resin molded product 70 according to this embodiment will be described.

[0124] 18 is a diagram showing the mold 10 according to this embodiment. In this embodiment, the gate 358 is located on the other side in the direction T of the cavity 60 from the extreme one side in the direction of arrow L. In other words, in this embodiment, the gate 358 is located between the tip portion 365 of the cavity 60 and the protruding portion 30 of the movable mold 26.

[0125] The other configurations are the same as those of the first embodiment.

[0126] In this embodiment, as shown in FIG. 19, when the slide core 56 moves to one side in the X direction, the hardened resin material R is cut at the gate 358, and a gate mark 80 is formed in the resin molded product 70.

[0127] 18, in the present embodiment, when the movable die 26 performs the volume expansion operation, the slide core 56 and the fixed die 20 are kept in contact with each other. As a result, similar to the first embodiment, the design surface is deformed when the resin molded product 70 is formed, and the possibility of impairing the design of the design surface of the formed resin molded product 70 can be reduced.

[0128] 17 , in this embodiment, the gate mark 80 is formed at the tip 384 of the overhanging portion 76, on the opposite side of the second design surface 86B in the thickness direction of the overhanging portion 76 from the tip in the overhanging direction. That is, since the gate mark 80 is formed at the tip 384 of the overhanging portion 76 on the opposite side of the second design surface 86B in the thickness direction of the overhanging portion 76 from the tip in the overhanging direction, the gate mark 80 is difficult to see from a person looking at the design surface. As a result, in the resin molded product 70 in this embodiment, the gate mark 80 is difficult to see from the design surface, reducing the possibility of impairing the design of the design surface.

[0129] The other actions and effects obtained by the mold 10 in the first embodiment can also be obtained in this embodiment.

[0130] Next, a fifth embodiment of the present disclosure will be described with appropriate reference to Figures 20 to 22. Note that, among the configurations according to this embodiment, configurations that are similar to those of the first embodiment will be assigned the same reference numerals, and specific descriptions thereof may be omitted.

[0131] Fifth Embodiment (Resin Molded Product 70) FIG. 20 is a diagram illustrating a resin molded product 70 according to the fourth embodiment. In this embodiment, unlike the resin molded product 70 according to the first embodiment, the tip end shape of the tip end 484 of the protruding portion 76 is linear rather than arc-shaped. In other words, the gate mark 80 is parallel to the direction T, which is the thickness direction of the protruding portion 76, and is formed to include a point of contact with a tangent line F that contacts the tip end 484 (the apex of the tip end 484). In other words, the gate mark 80 is formed on one side of the apex on one side of the direction of arrow L in the T direction within the range of the tip end 484 in the T direction, and is also formed on the other side of the apex on one side of the direction of arrow L in the T direction.

[0132] The shapes of other parts are similar to those of the resin molded product 70 according to the first embodiment.

[0133] Next, the mold 10 for manufacturing the resin molded product 70 according to this embodiment will be described.

[0134] 21 is a view showing the mold 10 in this embodiment. In this embodiment, a step 66 is formed at a parting surface 68 where the fixed mold 20 and the slide core 56 come into contact with each other.

[0135] 21 , the most one side of the second cavity 64 in the cavity 60 in the direction of arrow L is parallel to the direction X. In other words, in this embodiment, the second cavity 64 is linear, and the gate 458 is located at a tip portion 465 of the second cavity 64.

[0136] The other configurations are the same as those of the first embodiment.

[0137] In this embodiment, as shown in FIG. 22, when the slide core 56 moves to one side in the X direction, the hardened resin material R is cut at the gate 458, and a gate mark 80 is formed in the resin molded product 70.

[0138] 22, in the present embodiment, when the movable die 26 has performed the volume expansion operation, the slide core 56 is kept in contact with the fixed die 20. As a result, similar to the first embodiment, the design surface is deformed when the resin molded product 70 is formed, and the possibility of impairing the design of the design surface of the formed resin molded product 70 can be reduced.

[0139] In addition, in this embodiment, as shown in Figure 22, when the slide core 56 moves to one side in the X direction, the hardened resin material R is cut at the gate 458 portion, and a gate mark 80 is formed in the resin molded product 70.

[0140] 20 , in this embodiment, the gate mark 80 is formed at the tip 484 of the overhanging portion 76, on the opposite side of the second design surface 86B in the thickness direction of the overhanging portion 76 from the tip in the overhanging direction. That is, since the gate mark 80 is formed at the tip 484 of the overhanging portion 76 on the opposite side of the second design surface 86B in the thickness direction of the overhanging portion 76 from the tip in the overhanging direction, the gate mark 80 is difficult to see from a person looking at the design surface. As a result, in the resin molded product of this embodiment, the gate mark 80 is difficult to see from the design surface, reducing the possibility of impairing the design of the design surface.

[0141] 20 , in this embodiment, the gate mark 80 is formed such that the tip 484 of the protruding portion 76 is on the second design surface 86B side in the thickness direction at the tip 484 of the protruding portion 76, and the tip 484 is formed further inward of the main body portion 72 than the demarcation line D that demarcates the general portion 78 and the tip 484. In other words, the gate mark 80 on the second design surface 86B, which is on the opposite side of the second design surface 86B from the general portion 78, is easily blended into the demarcation line D, and is therefore inconspicuous to those viewing the design surface. As a result, in the resin molded product of this embodiment, the gate mark 80 is inconspicuous on the design surface, reducing the possibility of impairing the design of the design surface.

[0142] The above describes an embodiment of the present disclosure with reference to the accompanying drawings. However, it is clear that a person with ordinary knowledge in the field of technology to which the present disclosure pertains can conceive of various modifications or applications within the scope of the technical ideas set forth in the claims, and it is understood that these also naturally fall within the technical scope of the present disclosure.

[0143] The disclosure of Japanese Patent Application No. 2022-174980, filed on October 31, 2022, is incorporated herein by reference in its entirety.

[0144] All publications, patent applications, and technical standards mentioned in this specification are herein incorporated by reference to the same extent as if each individual publication, patent application, or technical standard was specifically and individually indicated to be incorporated by reference.

Claims

DEPCT6821 / 07 / 25681. A resin-cast product comprising a main section with a first designed surface and a projection extending from the outer edge of the main section to the opposite side from the first designed surface in the direction of the thickness of the main section and to the outside of the main section where the projection has a second designed surface contiguous to the first designed surface, where the projection includes the distal end in the projection direction and the common section between the distal end and the main section, the outer surface of the distal end lies toward the inside of the main section farther than the defined boundary line of the common section and the distal end, and a discharge channel notch is created at the distal end.

2. A resin-cast product according to claim 1 where the defined boundary line is a step oriented toward the inside of the main section from the second designed surface of the common section.

3. A resin-cast product according to claim 1 where the boundary line is created on the boundary line on the second designed surface.

4. A resin-cast product according to claim 1 where the boundary line is located at a position which is 0.5 mm.or more and 2.0 mm or less from the distal end of the protrusion; 5. Resin-cast product according to claim 1 where the shape of the distal end of the protrusion is curved; 6. Resin-cast product according to claim 1 where the end of the dispensing channel is connected to the surface end of the protrusion opposite the second designed surface; 7. Resin-cast product according to any one of claims 1 to 6 where the first resin bubble area is created inside the main body and a second resin bubble area connected to the first resin bubble area is created inside the protrusion;

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