Mold member

Abstract

The invention provides a mold member with a simple structure and high interestingness. A mold member (1) for molding a deformable object is provided with: a main body part (10) which has an opening part (15) communicating with the outside and which defines a molding space; and a cover part (20) which can be attached so as to close the opening part (15), the cover part (20) can be compressed and moved in the direction in which the volume of the molding space is reduced, and a communication hole (28) communicating with the outside is formed in at least one of the main body part (10) and the cover part (20). The cover part (20) can be compressed and moved in the direction in which the volume of the molding space is reduced, and a communication hole (28) communicating with the outside is formed in at least one of the main body part (10) and the cover part (20), so that when the cover part (20) is moved to mold the article, the remaining part can be discharged from the communication hole (28).

Description

Technical Field

[0001] The invention relates to a mold component. Background Art

[0002] In the past, for example, patent document 1 discloses a structure of a molded toy, which has a plurality of partial molds composed of a pair of combined molds, the pair of combined molds are mold-assembled with each other, and have a molding space inside which is injected with molding material in a mold-assembled state to mold a molded object, and the molded toy has a holding shell that can hold at least two partial molds in a state of being arranged adjacent to each other, and is characterized in that a groove is provided on the side of the partial mold, and a guide ridge is provided on the holding shell that can guide the groove when the partial mold is installed on the holding shell, and when at least two partial molds are guided by the guide ridge to the groove and installed on the holding shell and are arranged adjacent to each other, the molding spaces are communicated with each other, and the molded object is formed in a state in which the molding material injected into each molding space is integrated.

[0003] Prior art documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent No. 4224127 Summary of the Invention

[0006] Problems to be solved by the invention

[0007] Patent Document 1 provides a molded toy that can partially change the structure of a molded object and is easy to demold. A mold member with a new structure is required for this type of mold member.

[0008] The present invention provides, for example, a mold component with a new structure.

[0009] Solutions for solving problems

[0010] The present invention is, for example, a mold component that is used to form a deformable object, wherein the mold component comprises: a main body portion, which has an opening portion connected to the outside and divides a forming space; and a cover portion, which can be installed in a manner to close the above-mentioned opening portion, and the above-mentioned cover portion can be compressed and moved in a direction to reduce the volume of the above-mentioned forming space, and a connecting hole connected to the outside is formed in at least one of the above-mentioned main body portion and the above-mentioned cover portion.

[0011] Effects of the Invention

[0012] According to the present invention, for example, a mold member having a new structure can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a perspective view showing an example of a mold member representing one aspect of the present invention.

[0014] Figure 2 This is a perspective view obtained by observing the assembled state of the mold member from the bottom side.

[0015] Figure 3 This is Figure 2 A cross-sectional view of a portion of the lid shown along line A - A

[0016] Figure 4 This is Figure 1 An exploded perspective view of the mold member shown

[0017] Figure 5 This is Figure 4 A perspective view of the initial stage during the assembly of the mold member in the disassembled state shown

[0018] Figure 6 This is a perspective view showing the assembled state of the first mold part and the second mold part.

[0019] Figure 7 This is a side view of the assembled state of the mold member.

[0020] Figure 8 This is a perspective view showing the initial operation when forming a formed body.

[0021] Figure 9 This is a perspective view showing the operation after loading the formed body into the main body part.

[0022] Figure 10 This is a perspective view showing the tightening operation of the lid part.

[0023] Figure 11 This is a perspective view showing the operation when taking out the formed body.

[0024] Figure 12 This is a plan view showing an example of the supply form of the mold member.

[0025] Explanation of reference numerals

[0026] 1, mold member; 10, main body part; 11, first mold part; 12, second mold part; 14, reinforcing rib; 15, opening; 15g, spiral groove; 15w, opening peripheral wall; 15ws, outer peripheral surface; 16, hinge part; 20, lid part; 22, inner convex part; 22a, front end plane; 24, fitting projection; 28, communication hole; 28b, straight part; 30, runner. Detailed description of the invention

[0027] Hereinafter, a mold member as one aspect of the present invention will be described with reference to the drawings.

[0028] Figure 1 This is a perspective view showing an example of the mold member 1 representing one aspect of the present invention.

[0029] Figure 1 The shown mold member 1 is, for example, a molding member used when molding a deformable object such as paper clay, that is, the object to be molded 5 (refer to Figure 8 ). This mold member 1 includes: a main body portion 10 that defines a molding space SP; and a lid portion 20 that closes the opening 15 formed by the main body portion 10. The main body portion 10 molds the side surface of the object to be molded 5, and one end side (the lower side in the figure) constitutes a circular opening 15 with a large diameter and is a substantially conical shape that gradually tapers toward the other end side (the upper side in the figure). In addition, the inner surface 10is of the main body portion 10 has a curved shape such as bulging outward in a spiral shape upward.

[0030] The opening 15 formed at the lower end side of the main body portion 10 is constituted by a cylindrical opening peripheral wall 15w. On the outer peripheral surface 15ws of the opening peripheral wall 15w, there is a spiral groove 15g having a rectangular cross-sectional shape such as a thread groove. This spiral groove 15g is provided so as to rotate approximately 180 degrees around the outer peripheral surface 15ws of the opening peripheral wall 15w. In addition, the spiral groove 15g is an inclined groove that rotates approximately 180 degrees from the front edge 15e toward the base edge 15b of the opening peripheral wall 15w, and a pair of spiral grooves 15g (formed as two grooves) are formed at positions 180 degrees opposite in the circumferential direction of the opening peripheral wall 15w.

[0031] Figure 2 This is a perspective view obtained by observing the assembled state of the mold member 1 from the bottom side.

[0032] As Figure 2 shown, the lid portion 20 can be installed in the opening 15 to assemble the mold member 1. The lid portion 20 has two communication holes 28 that communicate the molding space SP with the outside at a position deviated from the self-rotation center C20 during installation. The communication holes 28 can discharge the air existing in the molding space SP when the object to be molded 5 is compressed, and accordingly can discharge the excess object to be molded 5 in the molding space SP. In addition, when the excess portion of the object to be molded 5 is extruded, the communication holes 28 can cut off the excess portion as described later along with the rotational movement of the lid portion 20.

[0033] Figure 3 This is Figure 2 a partial cross-sectional view of the lid portion 20 shown along line A - A.

[0034] As Figure 3As shown, the lid portion 20 includes a cylindrical outer ring portion 21 and an inner convex portion 22 that is approximately the same height as the outer ring portion 21 inside the outer ring portion 21. The inner convex portion 22 protrudes toward the inside of the forming space SP, and the front end plane 22a that constitutes the protruding front end thereof is configured as a flat plane and constitutes the inner surface wall of the forming space SP.

[0035] The lid portion 20 is provided with at least a pair of fitting protrusions 24 protruding inward at positions 180 degrees opposite in the circumferential direction. The at least a pair of fitting protrusions 24 can be fitted with the spiral groove 15g on their inner peripheral surfaces 24is. That is, the lid portion 20 has a structure in which the fitting protrusions 24 are guided by the spiral groove 15g and are screwed in to close the opening portion 15. Therefore, the lid portion 20 can move (compressively move) in a direction that reduces the volume of the forming space SP by its rotation. By this compressive movement operation, as will be described later, the formed body 5 accommodated in the forming space SP is compressed in a manner of being pressed into the forming space SP of the mold member 1 and formed into the shape of the forming space SP of the mold member 1.

[0036] The communication hole 28 is, for example, configured in a semi-circular shape having a curved portion 28a and a straight portion 28b at its edge (refer to Figure 2 ). Here, the straight portion 28b extends along the radial direction of the rotation radius of the lid portion 20. In addition, the straight portion 28b is configured in an inclined shape in which its thickness becomes thinner toward the forming space SP side and the wall thickness becomes thinner.

[0037] In addition, marks 20m, 10m for knowing the fitting start position of the fitting protrusions 24 and the spiral groove 15g are provided when the lid portion 20 is installed on the main body portion 10 (refer to Figure 1 ). Thereby, it is configured to be able to smoothly install the lid portion 20. Furthermore, as Figure 3 shown, the lid portion 20 becomes a state in which the fitting protrusions 24 are fitted into the terminal annular groove 15gc at the end position of the compressive movement. The terminal annular groove 15gc is an annular groove that is annular in the circumferential direction of the opening peripheral wall 15w. Therefore, the lid portion 20 can rotate at the end position (tightening state at the position closest to the forming space SP side) where the front end plane 22a of the inner convex portion 22 constitutes the inner surface of the forming space SP in a state where the fitting protrusions 24 are fitted into the terminal annular groove 15gc.

[0038] The lid portion 20 can rotate and move while maintaining the position of its tightened state. Thereby, as will be described later, it is possible to cut off the portion of the remaining formed body in the forming space SP that is extruded from the communication hole 28 by the compressive movement.

[0039] Figure 4 is Figure 1 the exploded perspective view of the mold member 1 shown.

[0040] As Figure 4As shown, the main body portion 10 is a combined structure of a first mold portion 11 and a second mold portion 12 that divides the forming space SP into two equal parts longitudinally. The opening portion 15 has a structure proportionally distributed by the first mold portion 11 and the second mold portion 12. Further, on the combined surface of the first mold portion 11 and the second mold portion 12, a reinforcing rib 14 that extends continuously for a predetermined length extends on the outer surface 10us side opposite to the forming space SP. Further, inside the reinforcing rib 14, a hinge portion 16 that combines the first mold portion 11 and the second mold portion 12 in an openable and closable manner is provided, and a closing locking portion 17 is provided at a position opposite to the hinge portion 16.

[0041] Figure 5 is Figure 4 A perspective view of the initial stage during the assembly of the mold member 1 in the disassembled state shown.

[0042] When assembling the mold member 1, first, the hinge portions 16 of the first mold portion 11 and the second mold portion 12 are combined. For example, the hinge portion 16 has a hooking portion 16a on the side of the first mold portion 11 and a hooked portion 16b on the side of the second mold portion 12. The hooking portion 16a is provided, for example, with three letter C-shaped hooks 16af arranged horizontally along the reinforcing rib 14 as a part of the reinforcing rib 14. On the other hand, the hooked portion 16b has a shaft portion 16bj that can be hooked by the letter C-shaped hook 16af. Thus, as [[ID=X]] Figure 5 shown, by combining the hooking portion 16a and the hooked portion 16b in a hooked manner, the hinge portion 16 is formed.

[0043] Figure 6 is a perspective view showing the assembled state of the first mold portion 11 and the second mold portion 12.

[0044] In the state where the first mold portion 11 and the second mold portion 12 are combined, as Figure 6 shown, the main body portion 10 can be opened and closed around the rotation axis C16 of the hinge portion 16. And when the main body portion 10 is closed, the closed state can be maintained by using the closing locking portion 17 provided on the side opposite to the hinge portion 16.

[0045] The closing locking portion 17, for example, has a locking claw 17b that protrudes orthogonally from the reinforcing rib 14 on the side of the second mold portion 12. On the other hand, the closing locking portion 17 has a locking edge 17a formed by the edge portion of the reinforcing rib 14 on the side of the first mold portion 11 so as to be locked with the locking claw 17b. Thus, when the first mold portion 11 and the second mold portion 12 are closed, the locking edge 17a is locked in such a manner as to enter the inside of the locking claw 17b.

[0046] Figure 7 is a side view of the assembled state of the mold member 1.

[0047] Figure 7 The mold member 1 shown is in a state where the cover portion 20 is attached with the main body portion 10 closed. This state is a state where the cover portion 20 is fitted so as to close the opening portion 15, and is a storage state where the mold member 1 is not used, or a state where the object to be formed 5 is pressurized and stored in the forming space SP.

[0048] In the main body portion 10, as Figure 7 shown, in a state where the first mold portion 11 and the second mold portion 12 are combined, the outer surface 10us is surrounded by the reinforcing rib 14 along the longitudinal direction. The reinforcing rib 14 has a relatively large width as shown toward the radially outer side of the forming space SP. Thus, the rigidity of the main body portion 10 is maintained at an extremely high state. In addition, the cover portion 20 has a structure in which its outer peripheral surface 20us has irregularities, and is a structure in which it is easy to apply force during its rotation operation.

[0049] Hereinafter, with reference to Figures 8 to 11 the forming of the object to be formed 5 using the mold member 1 will be described.

[0050] Figure 8 is a perspective view showing an initial operation when forming the object to be formed 5.

[0051] As Figure 8 shown, when molding the object to be formed 5 such as clay using the mold member 1, the cover portion 20 is removed in advance and the opening portion 15 of the main body portion 10 is opened. With respect to this main body portion 10, the object to be formed 5 is filled into the forming space SP in a manner of being pressed in from the opening portion 15. At this time, the amount of the object to be formed 5 is set to be slightly more than the filling ratio of the forming space SP.

[0052] Figure 9 is a perspective view showing an operation after filling the object to be formed 5 into the main body portion 10.

[0053] After filling the object to be formed 5 into the forming space SP of the main body portion 10, as Figure 9 shown, an operation of closing the opening portion 15 is performed using the cover portion 20. At this time, the cover portion 20 is positioned and fitted so that the cover - side mark 20m provided on the cover portion 20 and the main - body - side mark 10m provided on the main body portion 10 are aligned. By aligning these two marks 20m, 10m, the fitting projection 24 can be made to correspond to the fitting start position with respect to the spiral groove 15g.

[0054] Figure 10 is a perspective view showing the tightening operation of the cover portion 20.

[0055] Align the lid portion 20 with the opening portion 15 and rotate it in the clockwise direction. Through this rotation operation, the lid portion 20 moves toward the inner side of the forming space SP of the opening portion 15. Thereby, the inner convex portion 22 presses the formed body 5 within the opening portion 15, pressing the entire formed body 5 against the inner wall surface of the forming space SP.

[0056] When performing the rotation operation of the lid portion 20, the remaining formed body 5b is extruded from the communication hole 28. Then, the extruded remaining formed body 5b is cut off by the edge portion of the communication hole 28. Here, the lid portion 20 rotates freely without further penetration in the state of being pressed into the deepest part of the opening portion 15 as described above. That is, the lid portion 20 becomes a state where it can rotate in either the forward or reverse direction, and can neatly cut off the remaining formed body 5b.

[0057] Figure 11 It is a perspective view showing the operation when taking out the formed body 5a.

[0058] After the pressing operation of the formed body 5 is completed, reverse the lid portion 20 (counterclockwise direction) and remove it. After that, as Figure 11 shown, open the main body portion 10. By opening the main body portion 10, it is possible to take out, for example, the formed body 5a remaining on the second mold portion 12. Among them, the bottom surface 5ad of the formed body 5a has a flat structure. In this regard, since the front end plane 22a of the inner convex portion 22 of the lid portion 20 becomes a flat surface constituting the inner surface on the main body portion 10 side, it is possible to obtain a formed body 5a having a flat bottom surface 5ad.

[0059] Figure 12 It is a plan view showing an example of the supply form of the mold member 1.

[0060] The first mold portion 11, the second mold portion 12, and the lid portion 20 of the mold member 1 are formed of synthetic resin. Thus, for example, as Figure 12 shown, it can be supplied in a state connected by the runner 30 when molding using the above-mentioned members. In addition, various fittings 33, 34, 35, 36, 37, 39 that can be attached to the formed body 5a can be provided on the runner 30.

[0061] As described above, in the mold member 1 of this embodiment, the lid portion 20 can perform a compression movement in the direction of reducing the volume of the forming space SP, and at least one of the main body portion 10 and the lid portion 20 is formed with a communication hole 28 communicating with the outside. Thus, when moving the lid portion 20 and molding an article (formed body 5), the remaining portion can be discharged from the communication hole 28.

[0062] In the mold member 1 of this embodiment, the communication hole 28 provided in the lid portion 20 is formed at a position deviated from the rotation center of the lid portion 20. Therefore, it is possible to adopt a structure in which the remaining portion extruded from the communication hole 28 can be easily cut off by the rotational movement when the lid portion 20 is compressed and moved. Furthermore, the communication hole 28 has an inclined structure in which the thickness becomes thinner toward the edge of the linear portion 28b extending in the radial direction of rotation. Therefore, the remaining portion can be cut off well.

[0063] In the mold member of this embodiment, the lid portion 20 is configured to be able to rotate while being held at the end position of the compression movement. Therefore, the remaining portion extruded from the communication hole 28 can be cut off neatly.

[0064] In the mold member 1 of this embodiment, by providing an inward convex portion 22 projecting toward the inside of the forming space inside the lid portion 20, it is possible to easily apply pressure to the formed body 5 at the opening portion 15 by the rotational operation of the lid portion 20. In addition, the front end plane 22a of the inward convex portion 22 is configured as a plane, whereby it is easy to apply pressure. Furthermore, by configuring the front end plane 22a of the inward convex portion 22 to be flush with the inner surface of the main body portion 10 at the end position of the compression movement, the outer surface of the formed body 5a can be made flat, and the shape trace of the opening portion 15 can be made less likely to remain, and it can be made to conform to the shape of the main body portion 10.

[0065] In the mold member 1 of this embodiment, by providing the communication hole 28 in the inward convex portion 22 of the lid portion 20, the remaining portion extruded during the forming compression can be effectively cut off while the lid portion 20 rotates.

[0066] In addition, according to the mold member 1 of this embodiment, by providing a reinforcing rib 14 having a predetermined length on the outer surface 10us of the main body portion 10, the rigidity of the mold member 1 can be improved and the strength can be enhanced. In addition, by adopting a structure in which the main body portion 10 is divided into two along the reinforcing rib 14, it is possible to form a structure in which the main body portion 10 is divided into two while maintaining the strength.

[0067] In the mold member 1 of this embodiment, the first mold portion 11 and the second mold portion 12 can be opened and closed by the hinge portion 16. Thus, it is easy to take out the formed body 5a from the mold member 1. In addition, according to the structure that can be opened and closed, it is easy to take out the formed body 5a having a complex shape. Furthermore, since the hinge portion 16 is provided along the reinforcing rib 14, the hinge portion 16 can be easily formed and a hinge structure having a high strength can be formed.

[0068] In the mold member 1 of this embodiment, by forming the opening 15 into a structure proportionally divided by the first mold part 11 and the second mold part 12, the first mold part 11 and the second mold part 12 can be fastened when the cover part 20 is installed, and thus can be fixed reliably.

[0069] In the mold member 1 of this embodiment, the first mold part 11 and the second mold part 12 formed of synthetic resin are supplied in a state of being connected by the runner 30 during molding. Therefore, there is no case of missing additional parts, and the two parts can be provided reliably. In addition, other accessory parts can also be provided reliably in a state of being attached to the runner 30. Further, by providing the parts in a state of being installed on the runner 30, the feeling of a plastic model in which the parts are detached from the runner 30 can be enjoyed.

[0070] In addition, according to the mold member 1 of this embodiment, the portion forming the opening 15 is constituted by an opening peripheral wall 15w, and the opening peripheral wall 15w is formed with a spiral groove 15g on the outer peripheral surface 15ws. Thus, by fitting the fitting protrusion 24 formed on the inner peripheral surface of the cover part 20 into the spiral groove 15g and rotating the cover part 20, the cover part 20 can be moved along the axis of the opening 15.

[0071] In the mold member 1 of this embodiment, marks 10m and 20m for knowing the fitting start position of the fitting protrusion 24 and the spiral groove 15g are provided between the cover part 20 and the main body part 10. Thus, when the cover part 20 is inserted, the fitting can be easily performed.

[0072] As described above, one embodiment of the present invention has been described, but the present invention can be appropriately changed within the scope of its technical idea. For example, in the above embodiment, the communication hole 28 is provided in the cover part 20, but it is not limited to this structure, and it may also be a structure in which the communication hole 28 is provided in the main body part 10.

[0073] In addition, the communication hole 28 is formed in a structure in which two are provided at positions deviated from the rotation axis of the cover part 20, but it is not limited to this structure. The number of communication holes can be arbitrarily determined according to the size and shape of the mold member, and can be one or three or more. In addition, it may also be a structure provided on the rotation axis of the cover part 20. Further, when the number of communication holes is one, it is preferably provided at the central part of the cover.

[0074] <Summary of the Embodiment>

[0075] The above embodiment discloses at least the following mold member.

[0076] (1) A mold member for molding a deformable object, wherein,

[0077] The mold member includes:

[0078] A main body portion having an opening communicating with the outside and defining a forming space; and

[0079] A lid portion that can be installed in a manner of closing the opening,

[0080] The lid portion can be compressed and moved in a direction of reducing the volume of the forming space, and a communication hole communicating with the outside is formed in at least one of the main body portion and the lid portion.

[0081] (2) In the mold member described in (1),

[0082] The lid portion can perform the compression movement by rotation.

[0083] (3) In the mold member described in (2),

[0084] The communication hole is provided in the lid portion.

[0085] (4) In the mold member described in (3),

[0086] The communication hole is configured to cut off a portion where the object is extruded from the forming space to the outside by the compression movement by the rotation.

[0087] (5) In the mold member described in any one of (2) to (4),

[0088] The communication hole is provided at a position deviated from the rotation center of the lid portion.

[0089] (6) In the mold member described in any one of (2) to (5),

[0090] The edge of the communication hole has a curved portion and a straight portion,

[0091] The straight portion extends along the rotation radius direction of the lid portion and is configured to have an inclined shape with a wall thickness decreasing toward the edge.

[0092] (7) In the mold member described in any one of (2) to (6),

[0093] The lid portion is configured to be able to rotate while remaining at the end position of the compression movement.

[0094] (8) In the mold member described in any one of (2) to (7),

[0095] The lid portion has an inward convex portion protruding from the opening toward the inside of the forming space.

[0096] (9) In the mold member described in (8),

[0097] The protruding front end of the inner convex portion is configured as a front flat surface that is flat,

[0098] The front flat surface is configured to be flush with the inner surface of the main body portion at the end position of the compression movement of the lid portion.

[0099] (10) In the mold member described in (8) or (9),

[0100] The communication hole is provided in the inner convex portion.

[0101] (11) In the mold member described in any one of (1) to (10),

[0102] The outer surface of the main body portion on the side opposite to the inner surface forming the molding space is provided with reinforcing ribs that are continuous for a predetermined length.

[0103] (12) In the mold member described in (11),

[0104] The main body portion includes a first mold portion and a second mold portion, and the first mold portion and the second mold portion are divided along the reinforcing ribs.

[0105] (13) In the mold member described in (12),

[0106] The first mold portion and the second mold portion are configured to be able to open and close using a hinge portion provided along the reinforcing ribs.

[0107] (14) In the mold member described in (13),

[0108] The opening portion is proportionally distributed by the first mold portion and the second mold portion.

[0109] (15) In the mold member described in any one of (12) to (14),

[0110] The first mold portion and the second mold portion are formed of synthetic resin,

[0111] The first mold portion and the second mold portion are supplied in a state of being connected by a runner during molding.

[0112] (16) In the mold member described in any one of (1) to (15),

[0113] At the opening portion, the opening peripheral wall forming the opening is configured to be cylindrical, and at least a spiral groove surrounding the outer peripheral surface is provided on the outer peripheral surface of the opening peripheral wall.

[0114] The above-mentioned lid portion is provided with at least a pair of fitting protrusions that can be fitted into the above-mentioned spiral groove.

[0115] The above-mentioned compression movement can be performed by rotating in the fitting state of the above-mentioned spiral groove and the above-mentioned fitting protrusions.

[0116] (17) In the die member described in (16),

[0117] A mark for knowing the fitting start position of the above-mentioned fitting protrusion and the above-mentioned spiral groove is provided between the above-mentioned lid portion and the above-mentioned main body portion.

Claims

1. A mold member for forming a deformable object, wherein, the mold member includes: a main body portion having an opening communicating with the outside and defining a forming space; and a lid portion that can be installed in a manner of closing the opening, the lid portion can be compressed and moved in a direction of reducing the volume of the forming space, and a communication hole communicating with the outside is formed in at least one of the main body portion and the lid portion.

2. The mold member according to claim 1, wherein, the lid portion can perform the compression movement by rotation.

3. The mold member according to claim 2, wherein, the communication hole is provided in the lid portion.

4. The mold member according to claim 3, wherein, the communication hole is configured to be able to cut off a portion where the object is extruded from the forming space to the outside by the compression movement by the rotation.

5. The mold member according to claim 4, wherein, the communication hole is provided at a position deviated from the rotation center of the lid portion.

6. The mold member according to claim 5, wherein, the edge of the communication hole has a curved portion and a straight portion, the straight portion extends along the rotation radius direction of the lid portion, and is configured to have an inclined shape with a thinner wall thickness towards the edge.

7. The mold member according to claim 6, wherein, the lid portion is configured to be able to rotate while staying at the end position of the compression movement.

8. The mold member according to any one of claims 2 to 7, wherein, the lid portion has an inward convex portion protruding from the opening towards the inside of the forming space.

9. The mold member according to claim 8, wherein, the protruding front end of the inward convex portion is configured as a flat front plane, the front plane is configured to be flush with the inner surface of the main body portion at the end position of the compression movement of the lid portion.

10. The mold member according to claim 9, wherein, the communication hole is provided in the inward convex portion.

11. The mold member according to any one of claims 1 to 7, wherein, the main body portion has reinforcing ribs continuously provided with a predetermined length on the outer surface on the side opposite to the inner surface forming the forming space.

12. The mold member according to claim 11, wherein, the main body portion includes a first mold portion and a second mold portion, and the first mold portion and the second mold portion are divided along the reinforcing ribs.

13. The mold member according to claim 12, wherein, the first mold portion and the second mold portion are configured to be able to open and close by a hinge portion provided along the reinforcing ribs.

14. The mold member according to claim 13, wherein, the opening is proportionally distributed by the first mold portion and the second mold portion.

15. The mold member according to claim 14, wherein, the first mold portion and the second mold portion are formed of synthetic resin, the first mold portion and the second mold portion are supplied in a state of being connected by a runner during molding.

16. The mold member according to claim 15, wherein, At the opening portion, the opening peripheral wall forming the opening is configured in a cylindrical shape, and at least a spiral groove surrounding the outer peripheral surface is provided on the outer peripheral surface of the opening peripheral wall. The lid portion includes at least a pair of fitting protrusions that can be fitted into the spiral groove. The compression movement can be performed by rotating in a state where the spiral groove and the fitting protrusions are fitted.

17. The mold member according to claim 16, wherein A mark for knowing the fitting start position of the fitting protrusion and the spiral groove is provided between the lid portion and the main body portion.

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