Mold device for foam molding

Abstract

To provide a mold device for foam molding with a novel clamping mechanism.SOLUTION: A mold device 10 for foam molding according to the present disclosure that has a first mold 11 and a second mold 12, and the first mold and the second mold are closed to form a cavity includes: a first shaft 31 that is reciprocally movable in a first direction along a first side surface of the mold device for foam molding; a second shaft 51 that is movable back and forth along a second side surface that intersects with the first side surface and in a second direction X that intersects with the first direction; a conversion member 60 that converts a reciprocating movement of the first shaft in a first direction into the reciprocating movement of the second shaft in a second direction; and a displacement part 33, 53 that is displaced between a pressing position and a release position by the reciprocating movement of the second shaft in the second direction, and that presses the second mold against the first mold when located at the pressing position, and releases the pressure of the second mold against the first mold when located at the release position.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a foam molding die apparatus for forming a foam molded article. [Background technology]

[0002] Patent Documents 1 and 2 disclose a mold apparatus having a first mold and a second mold, which are closed together to form a cavity. This mold apparatus further has a clamp mechanism for pressing the first mold against the second mold when the mold is closed. The clamp mechanism includes a clamp that is disposed outside the mold apparatus and moves between an engagement position and a release position. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 2958106 [Patent Document 2] JP 2022-190714 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the mold device is arranged in, for example, a factory, sufficient space is required in the direction of movement of the clamp so as not to impede the movement of the clamp. However, the direction in which space can be secured within a factory is not uniform. In some environments, it may be difficult to secure space on the left and right sides of the mold device. In other environments, it may be difficult to secure space on the front and rear sides of the mold device. Since the mold device is used in various environments, it is preferable to provide various clamp mechanisms.

[0005] The present disclosure provides a foam molding die assembly with a novel clamping mechanism. [Means for solving the problem]

[0006] The mold apparatus of the present disclosure is a foam molding mold apparatus having a first mold and a second mold, and forming a cavity by closing the first mold and the second mold, and is equipped with a first shaft capable of reciprocating in a first direction along a first side surface of the foam molding mold apparatus, a second shaft capable of reciprocating in a second direction along a second side surface intersecting the first side surface and intersecting the first direction, a conversion member that converts the reciprocating movement of the first shaft in the first direction into reciprocating movement of the second shaft in the second direction, and a displacement section that is displaced between a pressing position and a release position by the reciprocating movement of the second shaft in the second direction, presses the second mold against the first mold when located at the pressing position, and releases the pressure of the second mold against the first mold when located at the release position. Effect of the Invention

[0007] The present disclosure can provide a foam molding die apparatus equipped with a novel clamping mechanism. [Brief description of the drawings]

[0008] [Figure 1] FIG. 2 is a left side view of a foam molding mold apparatus during mold closing in an embodiment of the present disclosure. [Diagram 2] FIG. 2 is a left side view of a foam molding mold apparatus during mold opening in an embodiment of the present disclosure. [Diagram 3] FIG. 2 is a front view of a foam molding die apparatus according to an embodiment of the present disclosure. [Figure 4] FIG. 2 is a top view of a foam molding mold apparatus according to an embodiment of the present disclosure. [Diagram 5] FIG. 1 is a diagram showing the movement of a first crank mechanism and a second crank mechanism; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] As shown in FIG. 1, the foam molding mold device 10 has a first mold 11 and a second mold 12. The foam molding mold device 10 closes the first mold 11 and the second mold 12 to form a cavity 13. The cavity 13 receives the foaming raw material to form a foam. The foaming raw material is, for example, a polyol component, an isocyanate component, or a mixture thereof. The polyol component may contain a crosslinking agent, a chain extender, a foaming agent, a catalyst, a foam stabilizer, a flame retardant, a plasticizer, and other auxiliaries. The foaming raw material may contain so-called powder particles that are solid at room temperature. These powder particles may be dispersed in a liquid such as a polyol or a plasticizer. The foam is formed by mixing the polyol component and the isocyanate component. It is preferable for the foaming raw material to be liquid at room temperature in terms of production. In order to prevent or reduce leakage of the liquid foaming raw material, it is preferable that the first mold 11 contacts the second mold 12 with precision. The foamed article is, for example, a polyurethane vehicle seat, seat pad, or seat back.

[0010] The foam molding mold apparatus 10 has a hinge shaft 14. As shown in Figures 1 and 2, the second die 12 is rotatably attached to the first die 11 via the hinge shaft 14.

[0011] In this embodiment, the foam molding die apparatus 10 is a roughly rectangular parallelepiped structure. As shown in Figs. 1, 3 and 4, the foam molding die apparatus 10 has a first side surface 10a (front surface), a second side surface 10b (left side surface), a third side surface 10c (right side surface), a fourth side surface 10d (rear surface), a top surface 10e and a bottom surface 10f. The fourth side surface 10d is roughly parallel to the first side surface 10a. The second side surface 10b is connected between the first side surface 10a and the fourth side surface 10d and intersects with the first side surface 10a. The third side surface 10c is connected between the first side surface 10a and the fourth side surface 10d, intersects with the first side surface 10a and is roughly parallel to the second side surface 10b.

[0012] The foam molding mold apparatus 10 has a clamp mechanism that presses the second die 12 against the first die 11 in a state in which the second die 12 is closed on the first die 11. The clamp mechanism of this embodiment will be described below.

[0013] 3, the foam molding mold apparatus 10 is provided on a first side surface 10a (front surface) with an operation unit 20, a first reciprocating mechanism 30, and a first crank mechanism 40 connected between the operation unit 20 and the first reciprocating mechanism 30. The foam molding mold apparatus 10 may further be provided on the first side surface 10a (front surface) with a third reciprocating mechanism 130 and a second crank mechanism 140 connected between the operation unit 20 and the third reciprocating mechanism 130.

[0014] The operating unit 20 is capable of rotating in a forward direction (e.g., counterclockwise in FIG. 3) and a reverse direction (e.g., clockwise in FIG. 3) upon receiving an external force. In this embodiment, the operating unit 20 has a rotating shaft 21, an arm 22 fixed to the rotating shaft 21, and a handle 23 connected to the arm 22. The rotating shaft 21 is capable of rotating relative to the second die 12 around the central axis of the rotating shaft 21. The handle 23 may be capable of rotating relative to the arm 22 around the handle axis. The handle 23 receives an external force and transmits the external force to the rotating shaft 21 via the arm 22. The rotating shaft 21 rotates in a forward direction and a reverse direction around the central axis of the rotating shaft 21 due to the external force.

[0015] The operation unit 20 may have a first restricting member 24 and a second restricting member 25 for defining the rotation ranges in the forward and reverse directions. In this embodiment, the first restricting member 24 and the second restricting member 25 are both fixed to the arm 22. The first restricting member 24 restricts the rotation of the operation unit 20 in the reverse direction by contacting an upper surface of a restricting plate 26 fixed to the second die 12 (see also FIG. 1). The second restricting member 25 restricts the rotation of the operation unit 20 in the forward direction by contacting a lower surface of the restricting plate 26 (see also FIG. 2).

[0016] As shown in (a) and (b) of FIG. 5, the operating unit 20, the first reciprocating mechanism 30, and the first crank mechanism 40 form a slider-crank mechanism that converts rotational motion into linear motion. Specifically, the first reciprocating mechanism 30 has a first shaft 31 and a first shaft support part 32 that slidably supports the first shaft 31. The first shaft 31 extends in a first direction (Y direction in the figure) along the first side surface 10a (front surface), and is supported by the first shaft support part 32 so as to be reciprocally movable in the first direction. The first shaft support part 32 is fixed to the second die 12. The first crank mechanism 40 has a first crank 41 fixed to the rotating shaft 21, and a first rod 42 connected between the first crank 41 and the first shaft 31.

[0017] The first reciprocating mechanism 30 may further have a first displacement portion 33 fixed to the first shaft 31. The first displacement portion 33 reciprocates between a first pressing position 34 and a first release position 35 in accordance with the reciprocating movement of the first shaft 31 in the first direction. When the first displacement portion 33 is located at the first pressing position 34, it engages with a first receiving portion 16 fixed to the first die 11 and presses the second die 12 against the first die 11. When the first displacement portion 33 is located at the first release position 35, it releases the engagement with the first receiving portion 16 and releases the pressing of the second die 12 against the first die 11.

[0018] In this embodiment, the first receiving portion 16 is a cylinder that protrudes perpendicularly from the first side surface 10a and is fixed to the first die 11. The first displacement portion 33 is a plate piece having a notch capable of receiving the first receiving portion 16. The notch may have a slope that acts to pull up the first receiving portion 16 as the first displacement portion 33 approaches the first pressing position 34.

[0019] Similarly, the operation unit 20, the third reciprocating mechanism 130, and the second crank mechanism 140 convert the rotational motion into a linear motion. The third reciprocating mechanism 130 has a third shaft 131 and a third shaft support part 132 that slidably supports the third shaft 131. The third shaft 131 extends in a first direction and is supported by the third shaft support part 132 so as to be reciprocable in the first direction. The third shaft support part 132 is fixed to the second die 12. The second crank mechanism 140 has a second crank 141 fixed to the rotating shaft 21, and a second rod 142 connected between the second crank 141 and the third shaft 131.

[0020] The third reciprocating mechanism 130 may further have a third displacement portion 133 fixed to the third shaft 131. The third displacement portion 133 reciprocates between a third pressing position 134 and a third release position 135 in accordance with the reciprocating movement of the third shaft 131 in the first direction. When the third displacement portion 133 is located at the third pressing position 134, it engages with a third receiving portion 18 fixed to the first die 11 and presses the second die 12 against the first die 11. When the third displacement portion 133 is located at the third release position 135, it releases the engagement with the third receiving portion 18 and releases the pressing of the second die 12 against the first die 11.

[0021] Returning to FIG. 1, the foam molding mold apparatus 10 further has a second reciprocating mechanism 50 and a first conversion member 60 connected between the first reciprocating mechanism 30 and the second reciprocating mechanism 50 on the second side surface 10b.

[0022] The second reciprocating mechanism 50 has a second shaft 51 and a second shaft support part 52 that slidably supports the second shaft 51. The second shaft 51 extends in a second direction (X direction in the figure) along the second side surface 10b, and is supported by the second shaft support part 52 so as to be reciprocally movable in the second direction. The second shaft support part 52 is fixed to the second die 12.

[0023] The second reciprocating mechanism 50 further has a second displacement portion 53 (53a, 53b, 53c) fixed to the second shaft 51. The second displacement portion 53 reciprocates between a second pressing position 54 and a second release position 55 in accordance with the reciprocating movement of the second shaft 51 in the second direction.

[0024] When the second displacement portions 53a, 53b are located at the second pressing position 54, they engage with the second receiving portion 17 (17a, 17b) fixed to the first die 11, and press the second die 12 against the first die 11. When the second displacement portions 53a, 53b are located at the second release position 55, they release the engagement with the second receiving portion 17 (17a, 17b), and release the pressing of the second die 12 against the first die 11.

[0025] When the second displacement portion 53c is located at the second pressing position 54, it engages with the hinge shaft 14 and presses the second die 12 against the first die 11. When the second displacement portion 53c is located at the second release position 55, it releases the engagement with the hinge shaft 14 and releases the pressing of the second die 12 against the first die 11.

[0026] In this embodiment, the second receiving portions 17a, 17b are cylinders that protrude perpendicularly from the second side surface 10b and are fixed to the first die 11. The second displacement portions 53a, 53b are plate pieces having notches capable of receiving the second receiving portions 17a, 17b. The notches may have a slope that acts to pull up the second receiving portions 17a, 17b as the second displacement portions 53a, 53b approach the second pressing position 54.

[0027] In this embodiment, the hinge shaft 14 is a round bar via a hinge fixed to the first die 11. This round bar is rotatably inserted into a hinge hole of a hinge fixed to the second die 12. The hinge hole of the hinge fixed to the second die 12 may have a slightly larger upper and lower clearance with respect to the round bar. The second displacement portion 53c is a plate piece having a notch capable of receiving the hinge shaft 14. The notch may have a slope that acts to pull up the hinge shaft 14 as the second displacement portion 53c approaches the second pressing position 54.

[0028] The first conversion member 60 converts the reciprocating motion of the first shaft 31 in a first direction (Y direction) into the reciprocating motion of the second shaft 51 in a second direction (X direction).

[0029] 4, in this embodiment, the first conversion member 60 is a generally triangular plate piece. The first conversion member 60 has a support hole 61, a first elongated hole 62, and a second elongated hole 63.

[0030] The first conversion member 60 is attached to the second die 12 by a support bolt 64 inserted into a support hole 61 so as to be rotatable around the support bolt 64. The first shaft 31 is connected to the first conversion member 60 by a first bolt 65 slidably inserted into a first long hole 62. The second shaft 51 is connected to the first conversion member 60 by a second bolt 66 slidably inserted into a second long hole 63.

[0031] The first elongated hole 62 may extend on a first straight line passing through the support hole 61. The first elongated hole 62 slidably receives a first bolt 65, thereby enabling both the movement of the first shaft 31 in the first direction and the rotation of the first conversion member 60 about the support bolt 64. Similarly, the second elongated hole 63 may extend on a second straight line different from the first straight line passing through the support hole 61. The second elongated hole 63 slidably receives a second bolt 66, thereby enabling both the movement of the second shaft 51 in the second direction and the rotation of the first conversion member 60 about the support bolt 64.

[0032] 4, the foam molding mold apparatus 10 may further include a fourth reciprocating mechanism 150 and a second conversion member 160 connected between the third reciprocating mechanism 130 and the fourth reciprocating mechanism 150 on the third side surface 10c. In this embodiment, the fourth reciprocating mechanism 150 has the same structure as the second reciprocating mechanism 50. The second conversion member 160 has the same structure as the first conversion member 60.

[0033] The fourth reciprocating mechanism 150 has a fourth shaft 151, a fourth shaft support portion 152 that slidably supports the fourth shaft 151, and a fourth displacement portion 153 (153a, 153b, 153c) fixed to the fourth shaft 151. The fourth displacement portions 153a and 153b are engageable with a fourth receiving portion 19 (19a, 19b) fixed to the first die 11. The fourth displacement portion 153c is engageable with the hinge shaft 14.

[0034] The fourth displacement parts 153a, 153b, and 153c may be disposed at the same positions as the second displacement parts 53a, 53b, and 53c in the second direction (X direction). Alternatively, the fourth displacement parts 153a, 153b, and 153c may be disposed at positions different from the second displacement parts 53a, 53b, and 53c in the second direction. Either arrangement may improve the in-plane uniformity of the pressing force of the second die 12 against the first die 11.

[0035] Next, a situation in which the foam molding mold apparatus 10 transitions from the mold closed state to the mold open state will be described. As shown in Fig. 1, when the handle 23 is located at the first rotation position 27, the second displacement portion 53 is located at the second pressing position 54. At this time, as shown in Fig. 3, the first displacement portion 33 is located at the first pressing position 34, and the third displacement portion 133 is located at the third pressing position 134.

[0036] 1, when the handle 23 receives an upward external force and rotates from the first rotation position 27 to the second rotation position 28, the second displacement portion 53 is located at the second release position 55. At this time, the first displacement portion 33 is located at the first release position 35, and the third displacement portion 133 is located at the third release position 135, as shown in FIG.

[0037] 2, when the handle 23 receives a further upward external force, the handle 23 transmits the external force to the second die 12 via the second regulating member 25 and the regulating plate 26. In response to this external force, the second die 12 rotates about the hinge shaft 14 and opens relative to the first die 11.

[0038] Thus, in this embodiment, the foam molding mold apparatus 10 can perform two operations, releasing the pressure of the second mold 12 against the first mold 11 and opening the second mold 12 from the first mold 11, with a single operation of receiving an upward external force on the handle 23.

[0039] In this embodiment, the operating unit 20 is rotatable between a first rotation position 27 (see FIG. 5(a)) and a second rotation position 28 (see FIG. 5(b)). When the operating unit 20 is located at the first rotation position 27, the handle 23 may be located below the rotating shaft 21. When the operating unit 20 is located at the second rotation position 28, the handle 23 may be located above the rotating shaft 21. The rotation range of the operating unit 20 may be less than 180 degrees.

[0040] As described above, the foam molding die device 10 includes the first shaft 31 reciprocating in a first direction (Y direction), the second shaft 51 reciprocating in a second direction (X direction), and the first conversion member 60 that converts the reciprocating movement of the first shaft 31 in the first direction into the movement of the second shaft 51 in the second direction. The foam molding die device 10 further includes a second displacement portion 53 that is displaced between a second pressing position 54 and a second release position 55 by the reciprocating movement of the second shaft 51 in the second direction. The second displacement portion 53 presses the second die 12 against the first die 11 when located at the second pressing position 54, and releases the pressing of the second die 12 against the first die 11 when located at the second release position 55. Such a novel foam molding die device 10 is provided.

[0041] In this embodiment, the second displacement portion 53 is fixed to the second shaft 51 and reciprocates with the reciprocating motion of the second shaft 51. In one use example, two foam molding die devices 10 are arranged on a conveyor such that the second side surface 10b (left side surface) of one foam molding die device 10 faces the third side surface 10c (right side surface) of another foam molding die device 10. In this embodiment, the second displacement portion 53 reciprocates in the second direction along the second side surface 10b, so that it is unlikely to interfere with the third side surface 10c of another foam molding die device 10. A layout in which the two foam molding die devices 10 are arranged in relatively close positions can be adopted.

[0042] Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above embodiments, and various modifications are possible without departing from the spirit of the invention. In particular, the examples described in this specification can be arbitrarily combined as necessary.

[0043] In addition, in the embodiment of the present disclosure, the second mold 12 is used as an upper mold, and the first shaft 31, the second shaft 51, and the conversion members 60, 160 are supported by the upper mold, but the first shaft 31, the second shaft 51, and the conversion members 60, 160 may also be supported by a lower mold. [Explanation of symbols]

[0044] 10. Foam molding die equipment 11 Type 1 12 Type 2 20 Control section 24 First restricting member 25 Second restricting member 26 Regulatory Board 31 First Shaft 51 Second Shaft 53 Second displacement section 54 Second pressing position 55 2nd release position 60 First conversion member 62 Support hole 63 1st long hole 64 2nd long hole

Claims

1. A foam molding mold apparatus having a first mold and a second mold, the first mold and the second mold being closed to form a cavity, A first shaft reciprocally movable in a first direction along a first side surface of the foam molding die device; a second shaft that is reciprocally movable along a second side surface that intersects with the first side surface and in a second direction that intersects with the first direction; a conversion member that converts the reciprocating movement of the first shaft in the first direction into the reciprocating movement of the second shaft in the second direction; a displacement section which is displaced between a pressing position and a release position by the reciprocating movement of the second shaft in the second direction, which presses the second die against the first die when located at the pressing position, and which releases the pressure of the second die against the first die when located at the release position; A foam molding mold apparatus comprising:

2. The second mold is opened relative to the first mold, the first shaft, the second shaft and the conversion member are supported by the second die; The displacement portion is fixed to the second shaft.

2. The foam molding mold apparatus according to claim 1.

3. The conversion member has a support hole that is rotatably supported by the second die. a first slot extending on a first straight line passing through the support hole; a second slot passing through the support hole and extending on a second straight line different from the first straight line; having the first shaft is slidably coupled in the first slot; The second shaft is slidably coupled in the second slot.

3. The foam molding die apparatus according to claim 2.

4. Further, an operating unit capable of rotating in a forward direction and a reverse direction when subjected to an external force is provided, the first shaft reciprocates in the first direction by rotating the operation unit in the forward direction and the reverse direction; 2. The foam molding mold apparatus according to claim 1.

5. the operating portion has a restricting member that restricts one of the forward and reverse rotations of the operating portion when the second shaft is located at the release position.

5. The foam molding die apparatus according to claim 4.

6. The device further includes a hinge shaft that supports the first and second dies so as to be openable and closable, the displacement portion presses the second die against the first die via the hinge shaft when located at the pressing position; 2. The foam molding mold apparatus according to claim 1.

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