Jig for tank inside mold

Abstract

This invention provides a jig for a mold's internal tank that allows for different temperatures in different parts of the mold without requiring any changes to the mold's design. [Solution] A jig for use in a hollow, bottomed tank located inside a mold, wherein the jig comprises a solid body having a flow path inside, and when the jig is housed in the tank, it forms a flow path inside the solid body and a flow path passing through the space outside the solid body.

Description

Technical Field

[0001] The present invention relates to a jig for an in-mold tank.

Background Art

[0002] For example, in injection molding, since high-temperature molten resin flows into the molding space of a mold, it is necessary to cool the resin in the molding space in order to form it with stable dimensions. As a cooling method, a method of providing a mechanism for adjusting the temperature of the mold and cooling the resin by heat exchange between the mold and the resin is common. For example, a bottomed cylindrical hole is provided in the mold to form a tank, a plurality of tanks are provided in one mold, adjacent tanks are communicated with through holes (pipes), and a fluid is continuously supplied to the pipes and the tanks to perform heat exchange between the fluid and the mold (tank inner wall) to adjust the temperature of the mold.

[0003] For example, in Patent Document 1, a flat partition plate is provided in the tank, and a fluid flowing into the tank from the inflow-side pipe reaches the bottom of the tank through one space separated by the partition plate and then flows out through the other space. According to this structure, since the tank inner wall (mold) contacts the fluid flowing in one direction, it is easy to uniformly adjust the temperature of the entire tank inner wall (mold).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Depending on the shape of the molded product, the properties of the resin, and the molding conditions, the thermal shrinkage rate may differ from part to part of the molded product. In such cases, it is necessary to adjust the temperature of the mold so that it differs depending on the part, rather than uniformly cooling the resin in the molding space. For example, one could consider changing the temperature of the fluid flowing through the tank in different parts of the system, but altering the layout of the tanks and piping to achieve this would require extensive design changes and significantly increase costs. The present invention aims to provide a jig that allows the temperature of a mold to be adjusted to different temperatures for each part of the mold without requiring any changes to the mold design. [Means for solving the problem]

[0006] <1> A jig that is housed and used inside a bottomed, hollow tank located inside a mold, The jig comprises a solid body having a flow channel inside, A jig for a mold tank, which, when housed inside the tank, forms a flow path inside the solid body and a flow path through the space outside the solid body. <2> The jig has a flat partition plate extending from the solid body, With the jig housed inside the tank, the partition plate is located in the space outside the solid body. <1> A jig for a tank inside a mold, as described above. <3> With the jig housed inside the tank, The solid body is fitted into the opening of the tank, forming a first space between the solid body and the bottom surface of the tank, and the partition plate is positioned in the first space. The aforementioned solid has two internal flow channels, The partition plate forms a passage in the first space that communicates with one of the internal passages, a passage that communicates with the other of the internal passages, and a passage that passes between the tip of the partition plate and the bottom surface of the tank. <2> A jig for a tank inside a mold, as described above. <4> With the jig housed inside the tank, The solid body is fitted into a portion of the depth of the tank, forming a first space between the solid body and the bottom surface of the tank, and a second space between the solid body and the opening of the tank, with the partition plate positioned in each of the first and second spaces. The aforementioned solid has two internal flow channels, The partition plate forms a passage in the first space that communicates with one of the internal passages, a passage that communicates with the other of the internal passages, and a passage that passes between the tip of the partition plate and the bottom surface of the tank, and forms a passage in the second space that communicates with one of the internal passages and a passage that communicates with the other of the internal passages. <2> A jig for a tank inside a mold, as described above. <5> With the jig housed inside the tank, The solid body is fitted near the bottom surface of the tank, forming a first space between the solid body and the bottom surface of the tank, forming a second space between the solid body and the opening of the tank, and the partition plate is positioned in the second space. The aforementioned solid has two internal flow channels, The partition plate forms a channel in the second space that communicates with one of the internal channels, and a channel that communicates with the other of the internal channels. <2> A jig for a tank inside a mold, as described above. <6> With the jig housed inside the tank, A portion of the outer surface of the solid body parallel to the depth direction of the tank is in contact with the inner wall of the tank, forming a third space between the remainder of the outer surface and the inner wall of the tank. The aforementioned internal body has one internal flow path, and the internal flow path is in communication with the third space. <1> A jig for a tank inside a mold, as described above. [Effects of the Invention]

[0007] According to the present invention, a jig is provided that allows the temperature of a mold to be adjusted to different temperatures for each part without requiring a change in the mold design. [Brief explanation of the drawing]

[0008] [Figure 1]It is a perspective view showing an embodiment of a jig for an in-mold tank according to the present invention. [Figure 2] It is a (A) front view, (B) plan view, and (C) side view of the jig for an in-mold tank of FIG. 1. [Figure 3] It is a cross-sectional view showing the state in which the jig for an in-mold tank of FIG. 1 is housed in a tank inside a mold. [Figure 4] It is a cross-sectional view showing the state in which a modified example of the jig for an in-mold tank of FIG. 1 is housed in a tank inside a mold. [Figure 5] It is a cross-sectional view showing the state in which a jig for an in-mold tank of another embodiment is housed in a tank inside a mold. [Figure 6] It is a (A) cross-sectional view showing the state in which a jig for an in-mold tank of another embodiment is housed in a tank inside a mold, and (B) plan view. [Figure 7] It is a (A) cross-sectional view showing the state in which a jig for an in-mold tank of another embodiment is housed in a tank inside a mold, and (B) plan view.

MODE FOR CARRYING OUT THE INVENTION

[0009] Hereinafter, referring to the drawings, a jig for an in-mold tank according to an embodiment of the present invention will be described. The following drawings are schematic diagrams for explaining the configuration clearly, and the dimensional ratios of each component may be different from the actual ones.

[0010] <First Embodiment> FIGS. 1 to 3 are views showing a jig 11 of the first embodiment. FIG. 1 is a perspective view, FIG. 2(A) is a front view, FIG. 2(B) is a plan view, and FIG. 2(C) is a side view. FIG. 3 is a cross-sectional view showing the state in which the jig 11 is housed in a tank 80 located inside a mold 70. The cross-section of the jig 11 in FIG. 3 is a cross-section along the line III-III in FIG. 2(C). The jig 11 of the present embodiment has a columnar solid body 12 and a flat partition plate 17. The partition plate 17 extends from the end face of the solid body 12 in the height direction of the solid body 12. The height direction of the solid body 12 is defined as the X direction. Among the radial directions of the solid body 12, the direction perpendicular to the surface of the partition plate 17 is defined as the Y direction. The direction perpendicular to both the X direction and the Y direction is defined as the Z direction. Of the two end faces of the solid body 12 perpendicular to the X direction, the end face on the side where the partition plate 17 is present is defined as the first end face 12a, and the opposite end face is defined as the second end face 12b. The central axis of the solid body 12 is defined as the axis P.

[0011] The solid body 12 has two flow paths (hereinafter also referred to as internal flow paths) 14 inside. The internal flow path 14 is an L-shaped through hole composed of a straight pipe portion 14a extending in the X direction from an opening 15a located at the first end face 12a and a bent portion 14b extending in the Y direction from an opening 15b located on the outer peripheral surface 12c. The openings 15a and 15b at both ends of the internal flow path 14 are circular. In the present embodiment, the two internal flow paths 14, 14 are symmetric with respect to a plane (X-Z plane) passing through the axis P and perpendicular to the Y direction.

[0012] The solid body 12 has a convex portion 16 protruding outward from the outer peripheral surface 12c. The convex portion 16 fits with a concave portion 84 provided on the inner wall 82 of the tank 80 in a state where the jig 11 is inserted into the tank 80. As shown in FIG. 1, the convex portion 16 is in the shape of a bar with a substantially rectangular cross section perpendicular to the X direction. Of the two end faces of the convex portion 16 perpendicular to the X direction, one end face 16a on the side of the first end face 12a of the solid body 12 abuts against the end face 84a of the concave portion 84 of the tank 80 to hold the position of the jig 11 in the X direction. The other end face 16b of the convex portion 16 is flush with the second end face 12b of the solid body 12. The side faces 16c, 16d of the convex portion 16 abut against the side faces of the concave portion 84 of the tank 80 to hold the orientation of the jig 11 in the circumferential direction of the solid body 12. The solid body 12 has two convex portions 16, 16. In the present embodiment, the two convex portions 16, 16 are symmetric with respect to a plane (X-Y plane) passing through the axis P and perpendicular to the Z direction.

[0013] As shown in FIG. 2(B), when the first end face 12a of the solid body 12 is viewed in plan from the X direction, the partition plate 17 is located between the two openings 15a, and the axis P passes through the center of the partition plate 17. The width of the partition plate 17 in the Z direction is the same as the outer diameter of the solid body 12. The end face 17b of the partition plate 17, which extends parallel to the X direction, is a curved surface flush with the outer circumferential surface 12c of the solid body 12. The tip 17a of the partition plate 17 in the X direction has a V-shaped notch. The jig 11 in this embodiment is a single molded product. That is, the base 17c of the partition plate 17 and the first end face 12a of the solid body 12 are formed from a continuous material.

[0014] Figure 3 shows an example of a mold 70. In this example, the mold 70 comprises a first mold 71, a second mold 72, and a third mold 73. When the first mold 71 and the second mold 72 are joined at the split surface 75, the space formed between the first mold 71 and the second mold 72 becomes the product space portion 74. Reference numeral 76 indicates the joining surface between the second mold 72 and the third mold 73. The second mold 72 has a tank 80 and piping 95 inside. The tank 80 is a hollow, bottomed cavity with an opening 83 at the joint surface 76. The inner wall 82 of the tank 80 is cylindrical, with the direction from the opening 83 toward the bottom surface 81 (X direction) as the depth direction. The inner diameter of the inner wall 82 of the tank 80 and the outer diameter of the solid body 12 of the jig 11 are the same. The inner wall 82 of the tank 80 and the solid body 12 are coaxial (axis P). In this embodiment, with the jig 11 housed inside the tank 80, the solid body 12 of the jig 11 fits into the opening 83 of the tank 80, and the second end face 12b of the solid body 12 and the joining surface 76 become flush.

[0015] The tank 80 has a groove-shaped recess 84 extending in the X direction from the opening 83. The recess 84 has a groove shape with a substantially rectangular cross-section perpendicular to the X direction. When the jig 11 is inserted into the tank 80, the recess 84 fits with the protrusion 16 of the solid body 12 of the jig 11. The end face 84a of the recess 84, opposite to the opening 83, is a surface perpendicular to the X direction. In the X direction, the length from the opening 83 to the end face 84a of the recess 84 is the same as the length of the protrusion 16 of the solid body 12. When the jig 11 is inserted into the tank 80, the end face 84a abuts against the end face 16a of the protrusion 16 of the solid body 12, thereby maintaining the position of the jig 11 in the X direction. The width of the recess 84 in the circumferential direction of the inner wall 82 is the same as the width of the convex portion 16 of the solid body 12 in the circumferential direction. When the jig 11 is inserted into the tank 80, the side surfaces of the recess 84 come into contact with the side surfaces 16c and 16d of the convex portion 16 of the solid body 12, thereby maintaining the orientation of the jig 11 in the circumferential direction. The tank 80 has two recesses 84, 84. In this embodiment, the two recesses 84, 84 are symmetrical with respect to a plane (XY plane) passing through axis P and perpendicular to the Z direction.

[0016] The piping 95 inside the mold 70 forms a first flow path 97 for supplying fluid into the tank 80 and a second flow path 98 for discharging fluid from the tank 80. An inlet 97a communicating with the first flow path 97 and an outlet 98a communicating with the second flow path 98 are opened in the inner wall 82 of the tank 80. The inlet 97a and outlet 98a are circular. In this embodiment, the inlet 97a and outlet 98a are symmetrical with respect to a plane (XZ plane) passing through axis P and perpendicular to the Y direction. With the jig 11 housed inside the tank 80, the inlet 97a and outlet 98a communicate with the openings 15b, 15b on the circumferential surface of the solid body 12, respectively.

[0017] The third mold 73 liquid-tightly closes the opening 83 of the tank 80. The third mold 73 has an annular groove 78 for fitting a ring 77 around the opening 83 of the tank 80. The jig 11 is inserted into the tank 80 of the third mold 73, and the O-ring 77 is fitted into the annular groove 78 of the third mold 73. By joining and fixing the second mold 72 and the third mold 73, the jig 11 is housed in a liquid-tight manner within the mold 70.

[0018] As shown in Figure 3, in the X direction, the length of the solid body 12 of the jig 11 is less than the depth of the tank 80. Therefore, when the jig 11 is housed in the tank 80, a first space 91 is formed between the solid body 12 and the bottom surface 81 of the tank 80, and the partition plate 17 of the jig 11 is located within the first space 91. The width of the partition plate 17 in the Z direction is the same as the inner diameter of the tank 80, and the end face 17b of the partition plate 17 is in contact with the inner wall 82 of the tank 80. Therefore, two adjacent flow paths R1 and R3 are formed in the first space 91, with the partition plate 17 in between. Furthermore, in the X direction, the length of the partition plate 17 is less than the distance from the first end face 12a of the solid body 12 to the bottom surface 81 of the tank 80. As a result, a flow path R2 is formed between the tip 17a of the partition plate 17 and the bottom surface 81 of the tank 80. Flow path R1 is a flow path that flows through the space enclosed by the inner wall 82 of the tank 80 and one surface of the partition plate 17, and communicates with one side of the internal flow path 14. Flow path R3 is a flow path that flows through the space enclosed by the inner wall 82 of the tank 80 and the other surface of the partition plate 17, and communicates with the other side of the internal flow path 14. Flow path R2 passes between the tip 17a of the partition plate 17 and the bottom surface 81 of the tank 80. In this way, the jig 11 forms a continuous flow path within the tank 80, passing through the internal flow paths 14, 14 of the solid body 12 and the first space 91 (flow paths R1, R2, R3) outside the solid body 12.

[0019] According to this embodiment, as shown in Figure 3, when fluid is supplied from the first channel 97 into the tank 80 with the jig 11 housed in the mold 70, the fluid flows through one of the internal channels 14 of the jig 11 to the first space 91, passes through channel R1, flows along the bottom surface 81 of the tank 80 through channel R2, then passes through channel R3, flows through the other internal channel 14, and flows out into the second channel 98. In the X-direction of the tank 80, in the region where the solid body 12 does not exist, i.e., the first space 91, the fluid flows while in contact with the inner wall (mold) of the tank, and heat exchange occurs between the fluid and the mold. In the region where the solid body 12 exists, the fluid flowing through the internal channel 14 comes into contact with the solid body 12, and the solid body 12 comes into contact with the inner wall (mold) 82 of the tank 80, so the fluid and the mold do not come into direct contact. Therefore, the temperature of the mold in contact with the first space 91 and the temperature of the mold in contact with the solid body 12 can be adjusted to be different from each other. In other words, by housing the jig 11 of this embodiment in the tank 80, the temperature of the mold on the bottom surface 81 side of the tank 80 and the temperature of the mold on the opening 83 side can be adjusted to be different from each other.

[0020] For example, if the thermal conductivity of the material constituting the jig 11 is different from the thermal conductivity of the material constituting the inner wall 82 (second mold 72) of the tank 80, the temperature of the mold in contact with the first space 91 and the temperature of the mold in contact with the solid body 12 can be made different from each other without changing the temperature of the fluid. The absolute value of the difference in the thermal conductivity of the two materials is preferably, for example, 10 to 100 W / (m·K), and more preferably 15 to 49.9 W / (m·K). Furthermore, it is even more preferable that the thermal conductivity of the jig 11 is lower than that of the inner wall 82 of the tank.

[0021] The material used to construct the jig 11 is preferably one that is stable even when in contact with the fluid flowing inside the tank 80 and that allows for the integral molding of the solid body 12 and the partition plate 17. Examples include photocurable resins, thermosetting resins, and metals. The thermal conductivity of the material used to construct the jig 11 is preferably, for example, 0.1 to 5.0 W / (m·K). The material constituting the inner wall 82 of the tank 80 is preferably a metal such as stainless steel or chromium-molybdenum steel. The thermal conductivity of the material constituting the inner wall 82 of the tank 80 is preferably 20 to 100 W / (m·K). The measurement temperature for thermal conductivity in this specification is 23±1℃.

[0022] The dimensions of the jig 11 are not particularly limited and may be designed according to the shape of the tank 80 that houses the jig 11. For example, the inner diameter of the tank 80 and the outer diameter of the solid body 12 may be between 8 and 25 mm. In the X direction, for example, the depth of the tank may be 20 to 200 mm. The length of the solid body 12 is preferably 8 mm or more, and more preferably 10 mm or more. The length of the partition plate 17 is preferably 8 mm or more, and more preferably 10 mm or more. With the jig 11 housed inside the tank 80, the minimum distance (narrowest point) between the tip 17a of the partition plate 17 and the bottom surface 81 of the tank 80 in the X direction is preferably 3 mm or more, and may be, for example, 3 to 4 mm. The thickness of the partition plate 17 in the Y direction may be, for example, 2 to 10 mm.

[0023] It is preferable that the inner diameter of the internal flow path 14 of the solid body 12 is constant in the longitudinal direction (flow direction) of the internal flow path 14. That is, it is preferable that the opening 15a of the first end face 12a of the solid body 12 and the opening 15b of the outer circumferential surface 12c of the solid body 12 have the same diameter. The inner diameter of the opening 15b in the outer surface 12c of the solid body 12 and the inner diameter of the opening (inlet 97a or outlet 98a) of the pipe 95 communicating with it may be the same or different. The inner diameters of the two openings 15a in the first end face 12a of the solid body 12 may be the same or different. The size of the two openings 15a is preferably designed to ensure a flow rate that allows all of the fluid in contact with the inner wall 82 of the tank 80 to flow without stagnation within the first space 91. The inner diameters of the opening 15a on the first end face 12a of the solid body 12 and the opening 15b on the outer circumferential surface 12c of the solid body 12 may be, for example, 3 to 10 mm. The ratio of the total volume of the internal channels 14 to the total volume of the solid body 12 (including the internal channels 14) may be, for example, 50% or less, 40% or less, 30% or less, or 20% or less. The lower limit is not particularly limited, but may be, for example, 10% or more.

[0024] [Differentiation] Figure 4 shows a modified example of the jig 11 of this embodiment, and is a cross-sectional view showing the jig 11 housed in the tank 80. Components identical to those in Figures 1-3 are denoted by the same reference numerals, and their descriptions may be omitted. This example shows a variation in the ratio of the length of the solid body 12 to the length of the partition plate 17 in the X direction of the jig 11. Specifically, the length of the solid body 12 is shortened and the length of the partition plate 17 is lengthened compared to the examples shown in Figures 1-3. As a result, the area of ​​the inner wall (mold) 82 of the tank 80 that is in contact with the fluid in the first space 91 on the bottom surface 81 side becomes larger, and the area where the solid body 12 is interposed between the fluid and the inner wall (mold) 82 on the opening 83 side becomes smaller. In this way, by changing the ratio of the lengths of the solid body 12 and the partition plate 17, it is possible to change the region where the mold temperature differs between the bottom surface 81 side and the opening 83 side of the tank 80.

[0025] In this embodiment, the inlet 97a and outlet 98a of the piping 95 of the mold 70 are shown and described in an example where they are symmetrical with respect to the XZ plane, but this is not the only example. In other words, the two internal flow paths of the solid body 12 do not have to be symmetrical with respect to the XZ plane. The inlet 97a and outlet 98a of the piping 95 of the mold 70 can be located where the solid body 12 can be designed so that the two internal flow paths 14 communicating with them do not intersect. For example, the piping may be located inside the third mold 73, and one or both of the inlet and outlet may be located facing the opening 83 of the tank 80. In this case, the opening of the internal flow path can be provided on the second end face 12b of the solid body 12.

[0026] In this embodiment, the protrusions 16, 16 of the solid body 12 and the recesses 84, 84 of the tank 80 are provided in symmetrical positions with respect to the XY plane, but this is not limited to this configuration. The protrusions of the solid body 12 and the recesses of the tank 80 only need to be able to maintain the position of the jig 11 in the X direction and the orientation of the jig 11 in the circumferential direction of the solid body 12, and their shape, size, number, and placement are not particularly limited.

[0027] In this embodiment, a notch is provided at the tip 17a of the partition plate 17, but the shape of the partition plate 17 as viewed from the Y direction may be rectangular, with a flat end face without a notch.

[0028] In this embodiment, the tank 80 is a bottomed cylindrical shape and the solid body 12 is a columnar shape, but it is not limited to these. The shape of the tank can be any bottomed hollow shape, and the solid body can be any shape that fits into the opening of the tank. For example, the inner wall of the tank may be a frustoconical shape that gradually decreases in diameter in the depth direction, and the solid body may be a frustoconical shape that fits into its opening.

[0029] <Second Embodiment> Figure 5 is a diagram showing the jig 21 of the second embodiment, and is a cross-sectional view showing the jig 21 housed in the tank 80. The jig 21 of this embodiment includes a cylindrical solid body 22, a flat first partition plate 27, and a flat second partition plate 28. The first partition plate 27 extends from one end face of the solid body 22 in the height direction of the solid body 22. The second partition plate 28 extends from the other end face of the solid body 22 in the height direction of the solid body 22. The height direction of the solid body 22 is defined as the X direction. Of the radial directions of the solid body 22, the direction perpendicular to the surface of the first partition plate 27 is defined as the Y direction. The direction perpendicular to both the X and Y directions is defined as the Z direction. Of the two end faces of the solid body 22 perpendicular to the X direction, the end face on the side where the first partition plate 27 is located is defined as the first end face 22a, and the end face on the side where the second partition plate 28 is located is defined as the second end face 22b. The central axis of the solid body 22 is defined as axis P.

[0030] The solid body 22 has two internal channels (internal channels) 24 inside. The internal flow path 24 is a through-hole extending in the X direction from an opening 25a located on the first end face 22a to an opening 25b located on the second end face 22b. The openings 25a and 25b at both ends of the internal flow path 24 are circular. In this embodiment, the two internal flow channels 24, 24 are symmetrical with respect to a plane (XZ plane) passing through axis P and perpendicular to the Y direction.

[0031] The shape of the first end face 22a of the solid body 22 when viewed from the X direction in a plan view is the same as in Figure 2(B). The first partition plate 27 is located between the two openings 15a. The width of the first partition plate 27 in the Z direction is the same as the outer diameter of the solid body 22. The end face of the first partition plate 27, which extends parallel to the X direction, is a curved surface that is flush with the outer circumferential surface 22c of the solid body 22. The tip 27a of the first partition plate 27 in the X direction has a V-shaped notch.

[0032] The shape of the second end face 22b of the solid body 22 when viewed from the X direction in a plan view is the same as in Figure 2(B). The second partition plate 28 is located between the two openings 15b. The width of the second partition plate 28 in the Z direction is the same as the outer diameter of the solid body 22. The end face of the second partition plate 28, which extends parallel to the X direction, is a curved surface flush with the outer peripheral surface 22c of the solid body 22. The leading end face of the second partition plate 28 in the X direction is a flat end face. In this embodiment, the orientation of the first partition plate 27 and the second partition plate 28 is the same in the rotational direction with axis P as the axis of rotation. That is, when the jig 21 is projected from the X direction onto the YZ plane, the first partition plate 27 and the second partition plate 28 are located in positions that overlap each other.

[0033] The second partition plate 28 has a protrusion 26 that projects outward from its end face, which is flush with the outer surface 22c of the solid body 22. The protrusion 26 fits into a recess 84 provided in the inner wall 82 of the tank 80 when the jig 21 is inserted into the tank 80. Similar to the first embodiment, the protrusion 26 is a rod-shaped structure with a substantially rectangular cross-section perpendicular to the X direction, and the recess 84 of the tank 80 is groove-shaped. Of the two end faces of the protrusion 26 perpendicular to the X direction, one end face on the solid body 22 side abuts against the end face of the recess 84 of the tank 80, thereby maintaining the position of the jig 21 in the X direction. The other end face of the protrusion 26 is flush with the end face of the tip of the second partition plate 28. The side surface of the protrusion 26 abuts against the side surface of the recess 84 of the tank 80, thereby maintaining the orientation of the jig 21 in the circumferential direction of the solid body 22. The second partition plate 28 has two protrusions 26, 26. The two protrusions 26, 26 are symmetrical with respect to a plane (XY plane) passing through axis P and perpendicular to the Z direction.

[0034] The jig 21 in this embodiment is a single molded piece. That is, the base 27c of the first partition plate 27 and the first end face 22a of the solid body 22 are formed from a continuous material. Also, the base 28c of the second partition plate 28 and the second end face 22b of the solid body 22 are formed from a continuous material.

[0035] Similar to the first embodiment, the tank 80 is a hollow, bottomed hole with an opening 83 at the joint surface 76. The inner wall 82 of the tank 80 is cylindrical, with the direction from the opening 83 toward the bottom surface 81 (X direction) as the depth direction. The inner diameter of the inner wall 82 of the tank 80 and the outer diameter of the solid body 22 are the same. The inner wall 82 of the tank 80 and the solid body 22 are coaxial (axis P). The tank 80 has a groove-shaped recess 84 extending in the X direction from the opening 83. The recess 84 is a groove-shaped groove with a substantially rectangular cross-section perpendicular to the X direction. When the jig 21 is inserted into the tank 80, the recess 84 fits with the protrusion 26 of the solid body 22 of the jig 21. In the inner wall 82 near the opening 83 of the tank 80, there is an inlet 97a communicating with the first flow path 97 and an outlet 98a communicating with the second flow path 98. The inlet 97a and outlet 98a are circular. In this embodiment, the inlet 97a and outlet 98a are symmetrical with respect to a plane (XZ plane) passing through axis P and perpendicular to the Y direction.

[0036] In this embodiment, with the jig 21 housed inside the tank 80, the solid body 22 of the jig 21 fits into the center of the tank 80 in the depth direction (X direction). The convex portion 26 of the second partition plate 28 fits into the concave portion 84 of the tank 80, and the end face of the tip portion 28a of the second partition plate 28 is flush with the joint surface 76. With the opening 83 of the tank 80 sealed liquid-tight with the third mold 73 and the jig 21 housed inside the mold, the end face of the tip of the second partition plate 28 abuts against the third mold 73 inside the opening 83 of the tank 80.

[0037] With the jig 21 housed in the mold, a first space 91 is formed between the solid body 22 and the bottom surface 81 of the tank 80, and a second space 92 is formed between the solid body 22 and the opening 83 (third mold 73) of the tank 80. The first partition plate 27 of the jig 21 is located in the first space 91, and the second partition plate 28 is located in the second space 92. The width of the first partition plate 27 in the Z direction is the same as the inner diameter of the tank 80, and two adjacent flow paths R1 and R3 are formed in the first space 91, with the first partition plate 27 in between. In the X direction, the length of the first partition plate 27 is smaller than the distance from the first end face 22a of the solid body 22 to the bottom surface 81 of the tank 80. Therefore, a flow path R2 is formed between the tip 27a of the first partition plate 27 and the bottom surface 81 of the tank 80. Flow path R1 is a flow path that flows through the space enclosed by the inner wall 82 of the tank 80 and one surface of the first partition plate 27, and communicates with one side of the internal flow path 24. Flow path R3 is a flow path that flows through the space enclosed by the inner wall 82 of the tank 80 and the other surface of the first partition plate 27, and communicates with the other side of the internal flow path 24. Flow path R2 passes between the front end of the partition plate 27 and the bottom surface 81 of the tank 80.

[0038] In the second space 92, the inner wall 82 of the tank 80 has an inlet 97a communicating with the first flow path 97 and an outlet 98a communicating with the second flow path 98. The inlet 97a and outlet 98a are circular. In this embodiment, the inlet 97a and outlet 98a are symmetrical with respect to a plane (XZ plane) passing through axis P and perpendicular to the Y direction. The width of the second partition plate 28 in the Z direction is the same as the inner diameter of the tank 80, and two adjacent flow paths R4 and R5 are formed in the second space 92, with the second partition plate 28 in between. Flow path R4 is a flow path enclosed by the inner wall 82 of the tank 80, one surface of the second partition plate 28, and the third mold 73, and communicates with one side of the internal flow path 24. Flow path R5 is a flow path enclosed by the inner wall 82 of the tank 80, the other surface of the second partition plate 28, and the third mold 73, and communicates with the other side of the internal flow path 24.

[0039] With the jig 21 housed inside the mold, when fluid is supplied from the first channel 97 into the tank 80, the fluid flows into the second space 92, passes through channel R4, flows through one of the internal channels 24 of the jig 21 to reach the first space 91, flows through channel R1, flows through channel R2 along the bottom surface 81 of the tank 80, then passes through channel R3, flows through the other internal channel 24 to reach the second space 92, and flows out into the second channel 98 through channel R5. In this way, the jig 21 forms a continuous flow path within the tank 80, passing through the internal flow paths 24, 24 of the solid body 22 and the first space 91 (flow paths R1, R2, R3) and second space 92 (flow paths R4, R5) outside the solid body 22.

[0040] In the X-direction of the tank 80, in the regions where the solid body 22 is not present, i.e., the first space 91 and the second space 92, the fluid flows in contact with the inner wall (mold) of the tank, and heat exchange occurs between the fluid and the mold. In the regions where the solid body 22 is present, the fluid flowing through the internal channel 24 comes into contact with the solid body 22, and the solid body 22 comes into contact with the inner wall (mold) 82 of the tank 80, so the fluid and the mold do not come into direct contact. Therefore, the temperature of the mold in contact with the first space 91 and the second space 92 can be adjusted to be different from the temperature of the mold in contact with the solid body 22. In other words, by housing the jig 21 of this embodiment in the tank 80, the temperature of the mold at the bottom surface 81 side and the opening 83 side of the tank 80 and the temperature of the mold in the intermediate part between them can be adjusted to be different from each other.

[0041] For example, if the thermal conductivity of the material constituting the jig 21 is different from the thermal conductivity of the material constituting the inner wall 82 (second mold 72) of the tank 80, the temperature of the second mold 72 in contact with the first space 91 and the second space 92 and the temperature of the second mold 72 in contact with the solid body 22 can be made different from each other without changing the temperature of the fluid. The preferred range for the absolute difference in the thermal conductivity of the two materials is the same as in the first embodiment. Furthermore, it is even more preferable that the thermal conductivity of the jig 21 is lower than that of the tank inner wall 82 (second mold 72). The materials constituting the jig 21 and the materials constituting the inner wall 82 (second mold 72) of the tank 80, respectively, are exemplified and have the same thermal conductivity as in the first embodiment.

[0042] The dimensions of the jig 21 are not particularly limited and may be designed according to the shape of the tank 80 that houses the jig 21. For example, the inner diameter of the tank 80 and the outer diameter of the solid body 22 may be 8 to 25 mm. In the X direction, for example, the depth of the tank may be 30 to 200 mm. The length of the solid body 22 is preferably 9 mm or more, and more preferably 10 mm or more. The length of the first partition plate 27 in the X direction is preferably 9 mm or more, and more preferably 10 mm or more. The thickness of the first partition plate 27 in the Y direction may be, for example, 2 to 10 mm. With the jig 21 housed in the tank 80, the minimum distance (narrowest point) between the tip 27a of the first partition plate 27 in the X direction and the bottom surface 81 of the tank 80 is preferably 3 mm or more, and may be, for example, 3 to 4 mm. The length of the second partition plate 28 in the X direction is preferably 9 mm or more, and more preferably 10 mm or more. The thickness of the second partition plate 28 in the Y direction may be, for example, 2 to 10 mm. The lengths of the first partition plate 27 and the second partition plate 28 in the X direction may be the same or different. The thicknesses of the first partition plate 27 and the second partition plate 28 in the Y direction may be the same or different.

[0043] It is preferable that the inner diameter of the internal flow path 24 of the solid body 22 is constant in the longitudinal direction (flow direction) of the internal flow path 24. That is, it is preferable that the opening 25a of the first end face 22a of the solid body 22 and the opening 25b of the second end face 22b of the solid body 22 have the same diameter. The inner diameters of the two openings 25a in the first end face 22a of the solid body 22 may be the same or different. The size of the two openings 25a is preferably designed to ensure a flow rate that allows all of the fluid in contact with the inner wall 82 of the tank 80 to flow without stagnation within the first space 91. The inner diameters of the two openings 25b in the second end face 22b of the solid body 22 may be the same or different. The size of the two openings 25b is preferably designed to ensure a flow rate that allows all of the fluid in contact with the inner wall 82 of the tank 80 to flow without stagnation within the second space 92. The inner diameters of the opening 25a on the first end face 22a and the opening 25b on the second end face 22b of the solid body 22 may be, for example, 3 to 10 mm. The ratio of the total volume of the internal channels 24 to the total volume of the solid body 22 (including the internal channels 24) may be, for example, 50% or less, 40% or less, 30% or less, or 20% or less. The lower limit is not particularly limited, but may be, for example, 10% or more.

[0044] [Differentiation] This embodiment has been described using an example where the inlet 97a and outlet 98a of the mold piping 95 are located symmetrically with respect to the XZ plane, but is not limited to this. The inlet 97a and outlet 98a of the mold piping 95 only need to open into two spaces formed by partitioning the second space 92 with the second partition plate 28, and communicate with the flow paths R4 and R5, respectively. For example, piping may be present within the third mold 73, and one or both of the inlet and outlet may be located facing the opening 83 of the tank 80.

[0045] In this embodiment, a notch is provided at the tip 27a of the first partition plate 27, but a flat end surface without a notch may also be used. In this embodiment, the orientations of the first partition plate 27 and the second partition plate 28 are the same in the rotational direction with axis P as the axis of rotation, but they may be different. That is, when the jig 21 is projected from the X direction onto the YZ plane, the first partition plate 27 and the second partition plate 28 may intersect.

[0046] In this embodiment, the tank 80 is a bottomed cylindrical shape and the solid body 22 is a columnar shape, but it is not limited to these. The shape of the tank can be a bottomed hollow, and the solid body can be a shape that fits into a part of the tank in the depth direction. For example, the inner wall of the tank may be a frustoconical shape that gradually decreases in diameter in the depth direction, and the solid body may be a frustoconical shape that fits into a part of it in the depth direction.

[0047] <Third Embodiment> Figure 6 shows the jig 31 of the third embodiment, where Figure 6(A) is a cross-sectional view showing the jig 31 housed in the tank 80, and Figure 6(B) is a plan view of the jig 31. The jig 31 of this embodiment has a cylindrical solid body 32 and a flat partition plate 37. The partition plate 37 extends from one end face of the solid body 32 in the height direction of the solid body 32. The height direction of the solid body 32 is defined as the X direction. Of the radial directions of the solid body 32, the direction perpendicular to the surface of the partition plate 37 is defined as the Y direction. The direction perpendicular to both the X and Y directions is defined as the Z direction. Of the two end faces of the solid body 32 perpendicular to the X direction, the end face on the side where the partition plate 37 does not exist is defined as the first end face 32a, and the end face on the side where the partition plate 37 exists is defined as the second end face 32b. The central axis of the solid body 32 is defined as axis P.

[0048] The solid body 32 has two internal channels (internal channels) 34 inside. The internal flow path 34 is a through-hole extending in the X direction from an opening 35a located at the first end face 32a to an opening 35b located at the second end face 32b. The openings 35a and 35b at both ends of the internal flow path 34 are circular. In this embodiment, the two internal flow channels 34, 34 are symmetrical with respect to a plane (XZ plane) passing through axis P and perpendicular to the Y direction.

[0049] As shown in Figure 6(B), when the first end face 32a of the solid body 32 is viewed from the X direction in a plan view, the partition plate 37 is located between the two openings 35a, and the axis P passes through the center of the partition plate 37. The width of the partition plate 37 in the Z direction is the same as the outer diameter of the solid body 32. The end face 37b of the partition plate 37, which extends parallel to the X direction, is a curved surface flush with the outer circumferential surface 32c of the solid body 32. The tip 37a of the partition plate 37 in the X direction has a V-shaped notch.

[0050] The partition plate 37 has a protrusion 36 that projects outward from its end face 37b, which is flush with the outer surface of the solid body 32. The protrusion 36 fits into a recess 84 provided in the inner wall 82 of the tank 80 when the jig 31 is inserted into the tank 80. Similar to the first embodiment, the protrusion 36 is a rod-shaped object with a substantially rectangular cross-section perpendicular to the X direction, and the recess 84 of the tank 80 is groove-shaped. Of the two end faces of the protrusion 36 perpendicular to the X direction, one end face on the solid body 32 side abuts against the end face of the recess 84 of the tank 80, thereby maintaining the position of the jig 31 in the X direction. The other end face of the protrusion 36 is flush with the end face of the tip of the partition plate 37. The sides 36c and 36d of the protrusion 36 abut against the sides of the recess 84 of the tank 80, thereby maintaining the orientation of the jig 31 in the circumferential direction of the solid body 32. The partition plate 37 has two protrusions 36, 36. The two protrusions 36, 36 are symmetrical with respect to a plane (XY plane) passing through axis P and perpendicular to the Z direction.

[0051] The jig 31 in this embodiment is a single molded product. That is, the base 37c of the partition plate 37 and the second end face 32b of the solid body 32 are formed from a continuous material.

[0052] Similar to the first embodiment, the tank 80 is a hollow, bottomed hole with an opening 83 at the joint surface 76. The inner wall 82 of the tank 80 is cylindrical, with the direction from the opening 83 toward the bottom surface 81 (X direction) as the depth direction. The inner diameter of the inner wall 82 of the tank 80 and the outer diameter of the solid body 32 of the jig 31 are the same. The inner wall 82 of the tank 80 and the solid body 32 are coaxial (axis P). The tank 80 has a groove-shaped recess 84 extending in the X direction from the opening 83. The recess 84 has a groove shape with a substantially rectangular cross-section perpendicular to the X direction. When the jig 31 is inserted into the tank 80, the recess 84 fits with the protrusion 36 of the solid body 32 of the jig 31. In the inner wall 82 near the opening 83 of the tank 80, there is an inlet 97a communicating with the first flow path 97 and an outlet 98a communicating with the second flow path 98. The inlet 97a and outlet 98a are circular. In this embodiment, the inlet 97a and outlet 98a are symmetrical with respect to a plane (XZ plane) passing through axis P and perpendicular to the Y direction.

[0053] With the jig 31 housed inside the tank 80, the solid body 32 of the jig 31 fits near the bottom surface of the tank 80, forming a first space 91 between the solid body 32 and the bottom surface 81 of the tank 80. In the X direction, the length of the solid body 32 of the jig 31 is less than the depth of the tank 80, so a second space 92 is formed between the solid body 32 and the opening 83 (third mold 73) of the tank 80. The partition plate 37 of the jig 31 is located within the second space 92. The protrusion 36 of the partition plate 37 fits into the recess 84 of the tank 80, and the end face of the tip 37a of the partition plate 37 is flush with the joining surface 76. With the opening 83 of the tank 80 liquid-tightly closed by the third mold 73 and the jig 31 housed inside the mold, the end face of the tip 37a of the partition plate 37 abuts against the third mold 73 inside the opening 83 of the tank 80.

[0054] The width of the partition plate 37 in the Z direction is the same as the inner diameter of the tank 80, and two adjacent flow paths R1 and R3 are formed in the second space 92, with the partition plate 37 in between. In addition, a flow path R2 is formed in the first space 91. Flow path R1 is a flow path that flows through the space enclosed by the inner wall 82 where the inlet 97a of the tank 80 is located and one side of the partition plate 37, and communicates with one side of the internal flow path 34. Flow path R3 is a flow path that flows through the space enclosed by the inner wall 82 where the outlet 98a of the tank 80 is located and the other surface of the partition plate 37, and communicates with the other side of the internal flow path 34. The flow path R2 is a flow path that flows through the first space 91, which is surrounded by the bottom surface 81 of the tank 80 and the inner wall 82 continuous therewith, and the first end surface 32a of the solid body 32, and communicates with both of the two internal flow paths 34.

[0055] With the jig 31 housed inside the mold, when fluid is supplied from the first channel 97 into the tank 80, the fluid flows into the second space 92, passes through channel R1, flows through one of the internal channels 34 of the jig 31 to reach the first space 91, flows through channel R2, then flows through the other internal channel 34 to reach the second space 92, and flows out into the second channel 98 through channel R5. In this way, the jig 31 forms a continuous flow path within the tank 80, passing through the internal flow paths 34, 34 of the solid body 32 and the first space 91 (flow path R2) and second space 92 (flow paths R1, R3) outside the solid body 32.

[0056] In the X-direction of the tank 80, in the regions where the solid body 32 does not exist, i.e., the first space 91 and the second space 92, the fluid flows while in contact with the inner wall (mold) of the tank, and heat exchange occurs between the fluid and the mold. In the regions where the solid body 32 exists, the fluid flowing through the internal channel 34 comes into contact with the solid body 32, and the solid body 32 comes into contact with the inner wall (mold) 82 of the tank 80, so the fluid and the mold do not come into direct contact. Therefore, the temperature of the mold in contact with the first space 91 and the second space 92 can be adjusted so that it is different from the temperature of the mold in contact with the solid body 32. In other words, by housing the jig 31 of this embodiment in the tank 80, the temperature of the mold at the bottom surface 81 and the opening 83 of the tank 80, and the temperature of the mold in the intermediate portion between them, can be adjusted to be different from each other.

[0057] For example, if the thermal conductivity of the material constituting the jig 31 is different from the thermal conductivity of the material constituting the inner wall 82 (second mold 72) of the tank 80, the temperature of the second mold 72 in contact with the first space 91 and the second space 92 and the temperature of the second mold 72 in contact with the solid body 32 can be made different from each other without changing the temperature of the fluid. The preferred range for the absolute difference in the thermal conductivity of the two materials is the same as in the first embodiment. Furthermore, it is even more preferable that the thermal conductivity of the jig 31 is lower than that of the tank inner wall 82 (second mold 72). The materials constituting the jig 31 and the materials constituting the inner wall 82 (second mold 72) of the tank 80, respectively, are exemplified and have the same thermal conductivity as in the first embodiment.

[0058] The dimensions of the jig 31 are not particularly limited and may be designed according to the shape of the tank 80 that houses the jig 31. For example, the inner diameter of the tank 80 and the outer diameter of the solid body 32 may be between 8 and 25 mm. In the X direction, for example, the depth of the tank may be 20 to 200 mm. The length of the solid body 32 is preferably 8 mm or more, and more preferably 10 mm or more. The length of the partition plate 37 in the X direction is preferably 8 mm or more, and more preferably 10 mm or more. The thickness of the partition plate 37 in the Y direction may be, for example, 2 to 10 mm. With the jig 31 housed in the tank 80, the distance between the first end face 32a of the solid body 32 and the bottom surface 81 of the tank 80 in the X direction may be, for example, 3 to 10 mm.

[0059] It is preferable that the inner diameter of the internal flow path 34 of the solid body 32 is constant in the longitudinal direction (flow direction) of the internal flow path 34. That is, it is preferable that the opening 35a of the first end face 32a of the solid body 32 and the opening 35b of the second end face 32b of the solid body 32 have the same diameter. The inner diameters of the two openings 35a in the first end face 32a of the solid body 32 may be the same or different. The size of the two openings 35a is preferably designed to ensure a flow rate that allows all of the fluid in contact with the inner wall 82 of the tank 80 to flow without stagnation within the first space 91. The inner diameters of the two openings 35b in the second end face 32b of the solid body 32 may be the same or different. The size of the two openings 35b is preferably designed to ensure a flow rate that allows all of the fluid in contact with the inner wall 82 of the tank 80 to flow without stagnation within the second space 92. The inner diameters of the opening 35a on the first end face 32a and the opening 35b on the second end face 32b of the solid body 32 may be, for example, 3 to 10 mm. The ratio of the total volume of the internal channels 34 to the total volume of the solid body 32 (including the internal channels 34) may be, for example, 50% or less, 40% or less, 30% or less, or 20% or less. The lower limit is not particularly limited, but may be, for example, 10% or more.

[0060] [Differentiation] This embodiment has been described using an example where the inlet 97a and outlet 98a of the mold piping 95 are in symmetrical positions with respect to the XZ plane, but it is not limited to this. The inlet 97a and outlet 98a of the mold piping 95 only need to open into two spaces formed by partitioning the second space 92 with a partition plate 37, and communicate with the flow paths R1 and R3, respectively. For example, piping may be present within the third mold 73, and one or both of the inlet and outlet may be located facing the opening 83 of the tank 80.

[0061] In this embodiment, the tank 80 is a bottomed cylindrical shape and the solid body 32 is a columnar shape, but it is not limited to these. The shape of the tank can be any bottomed hollow shape, and the solid body can be any shape that fits near the bottom surface of the tank. For example, the inner wall of the tank may be a frustoconical shape that gradually decreases in diameter in the depth direction, and the solid body may be a frustoconical shape that fits near its bottom surface.

[0062] <Fourth Embodiment> Figure 7 shows the jig 41 of the fourth embodiment, where Figure 7(A) is a cross-sectional view showing the jig 41 housed in the tank 80, and Figure 7(B) is a plan view of the jig 41. The jig 41 of this embodiment consists of a columnar solid body 42 with a substantially semicircular base. The base of the solid body 42 is larger than a semicircle, enclosed by an arc, which is part of a circle, and a chord, which is a straight line. The axis passing through the center of the circle and parallel to the height direction is defined as axis P. The outer surface of the solid body 42 parallel to axis P consists of a curved portion 42c, which is part of a cylinder centered on axis P, and a flat portion 42d. One of the end faces perpendicular to axis P is defined as the first end face 42a, and the other as the second end face 42b. The direction parallel to the axis P of the solid body 42 is defined as the X direction, and the direction perpendicular to the planar portion 42d is defined as the Y direction. The direction perpendicular to both the X and Y directions is defined as the Z direction.

[0063] The solid body 42 has one channel (hereinafter also referred to as the internal channel) 44 inside. The internal flow path 44 is an L-shaped through-hole consisting of a straight pipe section 44a extending in the X direction from an opening 45a located at the first end face 42a, and a bent section 44b extending in the Y direction from an opening 45b located at the curved surface section 42c. The openings 45a and 45b at both ends of the internal flow path 44 are circular.

[0064] The solid body 42 has a protrusion 46 that projects outward from the curved surface portion 42c. The protrusion 46 fits into a groove-shaped recess 84 provided in the inner wall 82 of the tank 80 when the jig 41 is inserted into the tank 80. Similar to the first embodiment, the protrusion 46 is a rod-shaped structure with a substantially rectangular cross-section perpendicular to the X direction. Of the two end faces of the protrusion 46 perpendicular to the X direction, one end face, which is on the side of the first end face 42a of the solid body 42, abuts against the end face of the recess 84 of the tank 80, thereby maintaining the position of the jig 41 in the X direction. The other end face of the protrusion 46 is flush with the second end face 42b of the solid body 42. The sides 46c and 46d of the protrusion 46 abut against the sides of the recess 84 of the tank 80, thereby maintaining the orientation of the jig 41 in the circumferential direction of the curved surface portion 42c of the solid body 42. The solid body 42 has two protrusions 46, 46. In this embodiment, the two protrusions 46, 46 are symmetrical with respect to a plane (XY plane) passing through axis P and perpendicular to the Z direction.

[0065] Similar to the first embodiment, the tank 80 is a hollow, bottomed hole with an opening 83 at the joint surface 76. The inner wall 82 of the tank 80 is cylindrical, with the direction from the opening 83 toward the bottom surface 81 (X direction) as the depth direction. The inner diameter of the inner wall 82 of the tank 80 is the same as the outer diameter of the cylindrical curved portion 42c of the solid body 42. The inner wall 82 of the tank 80 and the solid body 42 are coaxial (axis P). The tank 80 has a groove-shaped recess 84 extending in the X direction from the opening 83. The recess 84 is a groove-shaped groove with a substantially rectangular cross-section perpendicular to the X direction. When the jig 41 is inserted into the tank 80, the recess 84 fits with the protrusion 46 of the solid body 42 of the jig 41. In the inner wall 82 near the opening 83 of the tank 80, there is an inlet 97a communicating with the first flow path 97 and an outlet 98a communicating with the second flow path 98. The inlet 97a and outlet 98a are circular. In this embodiment, the inlet 97a and outlet 98a are symmetrical with respect to a plane (XZ plane) passing through axis P and perpendicular to the Y direction.

[0066] With the jig 41 housed inside the tank 80, the solid body 42 of the jig 41 fits into the opening of the tank 80. As shown in Figure 7(A), of the outer circumferential surfaces of the solid body 42 parallel to the X direction, the curved portion 42c is in contact with the inner wall 82 of the tank 80, and a third space 93 is formed between the flat portion 42d (outer circumferential surface other than the curved portion 42c) and the inner wall 82 of the tank 80. Also, in the X direction, since the length of the solid body 42 of the jig 41 is less than the depth of the tank 80, a first space 91 is formed between the first end face 42a of the solid body 42 and the bottom surface 81 of the tank 80. The first space 91 communicates with the opening 45a of the first end face 42a of the solid body 42 and becomes a flow path R1 that passes between the first end face 42a of the solid body 42 and the bottom surface 81 of the tank 80. The third space 93 is continuous with the first space 91 and becomes a flow path R6 that is continuous with flow path R1. The opening 45b of the curved portion 42c of the solid body 42 communicates with the inlet 97a of the inner wall 82 of the tank 80. The outlet 98a of the inner wall 82 of the tank 80 communicates with the third space 93. In this way, the jig 41 forms a continuous flow path within the tank 80, passing through the internal flow path 44 of the solid body 42 and the first space 91 (flow path R2) and third space 93 (flow path R6) outside the solid body 42. With the jig 41 housed inside the mold 70, when fluid is supplied from the first channel 97 into the tank 80, the fluid passes through the internal channel 44 of the jig 41, reaches the first space 91, flows along the bottom surface 81 of the tank 80 in channel R2, and then flows out through channel R6 into the second channel 98.

[0067] In the areas of the inner wall 82 of the tank 80 where the solid body 42 is not present, namely the first space 91 and the third space 93, the fluid flows in contact with the inner wall (mold) of the tank, and heat exchange occurs between the fluid and the mold. In the areas where the solid body 42 is present, the fluid flowing through the internal channel 44 comes into contact with the solid body 42, the solid body 42 comes into contact with the inner wall (mold) 82 of the tank 80, and the fluid and the mold do not come into direct contact. Therefore, the temperature of the mold in contact with the first space 91 and the third space 93 can be adjusted to be different from the temperature of the mold in contact with the solid body 42. In other words, by housing the jig 41 of this embodiment in the tank 80, the temperature of the mold can be adjusted to be different in a part of the circumferential direction of the inner wall 82 of the tank 80 from the rest.

[0068] For example, if the thermal conductivity of the material constituting the jig 41 is different from the thermal conductivity of the material constituting the inner wall 82 (second mold 72) of the tank 80, the temperature of the mold in contact with the first space 91 and the third space 93 and the temperature of the mold in contact with the solid body 42 can be made different from each other without changing the temperature of the fluid. The absolute value of the difference in the thermal conductivity of the two materials is preferably, for example, 10 to 100 W / (m·K), and more preferably 15 to 49.9 W / (m·K). Furthermore, it is even more preferable that the thermal conductivity of the jig 41 is lower than that of the inner wall 82 of the tank.

[0069] The material used to construct the jig 41 is preferably one that is stable even when in contact with the fluid flowing inside the tank 80 and that allows for the integral molding of the solid body 42 and the partition plate. Examples include photocurable resins, thermosetting resins, and metals. The thermal conductivity of the material used to construct the jig 41 is preferably, for example, 0.1 to 5.0 W / (m·K). The material constituting the inner wall 82 of the tank 80 is preferably a metal such as stainless steel or chromium-molybdenum steel. The thermal conductivity of the material constituting the inner wall 82 of the tank 80 is preferably 20 to 100 W / (m·K).

[0070] The dimensions of the jig 41 are not particularly limited and may be designed according to the shape of the tank 80 that houses the jig 41. For example, the inner diameter of the tank 80 and the outer diameter of the curved portion 42c of the solid body 42 may be 8 to 25 mm. In the X direction, for example, the depth of the tank may be 10 to 200 mm, and the length of the solid body 42 is preferably 7 mm or more, and more preferably 10 mm or more. With the jig 41 housed in the tank 80, the distance between the first end face 42a of the solid body 42 and the bottom surface 81 of the tank 80 in the X direction is preferably 3 mm or more.

[0071] It is preferable that the inner diameter of the internal flow path 44 of the solid body 42 is constant in the longitudinal direction (flow direction) of the internal flow path 44. That is, it is preferable that the opening 45a of the first end face 42a of the solid body 42 and the opening 45b of the curved surface portion 42c of the solid body 42 have the same diameter. The inner diameter of the opening 45b of the curved portion 42c of the solid body 42 and the inner diameter of the opening (inlet 97a) of the pipe 95 communicating with it may be the same or different. The inner diameters of the opening 45a in the first end face 42a of the solid body 42 and the opening 45b in the curved portion 42c of the solid body 42 may be, for example, 3 to 10 mm. The ratio of the total volume of the internal channels 44 to the total volume of the solid body 42 (including the internal channels 44) may be, for example, 50% or less, 40% or less, 30% or less, or 20% or less. The lower limit is not particularly limited, but may be, for example, 10% or more.

[0072] [Differentiation] In this embodiment, the inlet 97a and outlet 98a of the piping 95 of the mold 70 are shown and described in an example where they are symmetrical with respect to the XZ plane, but the embodiment is not limited to this. When the inlet 97a of the piping 95 of the mold communicates with the internal flow path 44 of the solid body 42, the outlet 98a should open into the third space 93 and communicate with the flow path R6. For example, piping may be present within the third mold 73, and one or both of the inlet and outlet may be located facing the opening 83 of the tank 80. In this case, an opening for the internal flow path may be provided on the second end face 42b of the solid body 42.

[0073] In this embodiment, the convex portions 46, 46 of the curved surface portion 42c of the solid body 42 and the concave portions 84, 84 of the tank 80 are provided in symmetrical positions with respect to the XY plane, but this is not limited to this. The convex portions of the solid body 42 and the concave portions of the tank 80 only need to be able to maintain the position of the jig 41 in the X direction and the orientation of the jig 41 in the circumferential direction of the curved surface portion 42c of the solid body 42, and their shape, size, number, and position are not particularly limited.

[0074] In this embodiment, the tank 80 is a bottomed cylindrical shape and the solid body 42 is a columnar shape, but it is not limited to these. The shape of the tank can be any bottomed hollow shape, and the solid body can be fitted into the opening of the tank, with a part of the outer surface of the solid body in contact with the inner wall of the tank. For example, the inner wall of the tank may be a frustoconical shape that gradually decreases in diameter in the depth direction, and the solid body may have a shape in which a substantially columnar portion, including a part of the circumferential surface of the frustoconical shape that fits into its opening and parts of both end faces, has been removed.

[0075] In this embodiment, the length of the solid body 42 of the jig 41 in the X direction is made smaller than the depth of the tank 80, and a first space 91 is provided between the first end face 42a of the solid body 42 and the bottom surface 81 of the tank 80. However, the first end face 42a of the solid body 42 and the bottom surface 81 of the tank 80 may be in contact. In this case, the first space 91 is not formed, so an opening 45a for the internal flow path 44 can be provided in the flat portion 42d of the solid body 42 to connect the internal flow path 44 and the third space 93.

[0076] In the first to fourth embodiments, the fluid may be for cooling or heating, and may be water or oil. The shape, number, and position of the tanks within the mold are not limited to the above embodiment. Any number of tanks can be provided at any desired position within the mold. The shapes of the multiple tanks may be the same or different. The tanks may be connected to each other by piping. [Explanation of Symbols]

[0077] 11, 21, 31, 41 Jigs (Jigs for tanks inside molds) 12, 22, 32, 42 medium solid bodies 12a, 22a, 32a, 42a 1st end surface 12b, 22b, 32b, 42b 2nd end surface 12c, 22c, 32c outer surface 14, 24, 34, 44 Internal flow paths (internal flow paths) 14a, 44a straight pipe section 14b, 44b bent part 15a, 15b, 25a, 25b, 35a, 35b, 45a, 45b Openings (openings for internal flow paths) 16, 26, 36, 46 convex parts 16a, 16b end face 16c, 16d, 46c, 46d side 17, 37 Partition plates 17a, 37a tip 17b, 37b end face 17c, 37c base 27. First partition plate 27a Tip 27c base 28. Second partition plate 28a Tip 28c base 42c curved part 42d Flat part 70 molds 71 First mold 72. Second mold 73. Third mold 74 Product space department 75 Section 76 Joint surface 77 O-rings 78 Annular groove 80 tanks 81 Bottom 82 Inner wall 83 Opening 84 recess 84a End face 91 1st space 92 Second space 93 Third space 95 Piping 97 First channel 97a Inlet 98 Second channel 98a Outlet

Claims

1. A jig that is housed and used inside a bottomed, hollow tank located inside a mold, The jig comprises a solid body having a flow channel inside, A jig for a mold tank, which, when housed inside the tank, forms a flow path inside the solid body and a flow path through the space outside the solid body.

2. The jig has a flat partition plate extending from the solid body, The mold in-tank jig according to claim 1, wherein the partition plate is located in the space outside the solid body when the jig is housed inside the tank.

3. With the jig housed inside the tank, The solid body is fitted into the opening of the tank, forming a first space between the solid body and the bottom surface of the tank, and the partition plate is positioned in the first space. The aforementioned solid has two internal flow channels, The mold-in-tank jig according to claim 2, wherein the partition plate forms a passage in the first space that communicates with one of the internal passages, a passage that communicates with the other of the internal passages, and a passage that passes between the tip of the partition plate and the bottom surface of the tank.

4. With the jig housed inside the tank, The solid body is fitted into a part of the depth of the tank, forming a first space between the solid body and the bottom surface of the tank, and a second space between the solid body and the opening of the tank, with the partition plate positioned in each of the first and second spaces. The aforementioned solid has two internal flow channels, The mold-in-tank jig according to claim 2, wherein the partition plate forms a passage in the first space that communicates with one of the internal passages, a passage that communicates with the other of the internal passages, and a passage that passes between the tip of the partition plate and the bottom surface of the tank, and forms a passage in the second space that communicates with one of the internal passages and a passage that communicates with the other of the internal passages.

5. With the jig housed inside the tank, The solid body is fitted near the bottom surface of the tank, forming a first space between the solid body and the bottom surface of the tank, forming a second space between the solid body and the opening of the tank, and the partition plate is positioned in the second space. The aforementioned solid has two internal flow channels, The mold tank jig according to claim 2, wherein the partition plate forms a channel in the second space that communicates with one of the internal channels and a channel that communicates with the other of the internal channels.

6. With the jig housed inside the tank, A portion of the outer surface of the solid body parallel to the depth direction of the tank is in contact with the inner wall of the tank, and a third space is formed between the remainder of the outer surface and the inner wall of the tank. The mold tank jig according to claim 1, wherein the internal body has one internal flow path, and the internal flow path is in communication with the third space.

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