Forming device

Abstract

To provide a molding device to which molds of various thicknesses can be attached. [Solution] The molding device 10 includes a toggle mechanism 20 and a movement mechanism 40. In the toggle mechanism 20, one end of a toggle arm 24A is rotatably connected to one end of a toggle lever 22 having a rotation center, and one end of a toggle arm 24B is rotatably connected to the other end of the toggle lever 22. A mold 12B is disposed at the other end of the toggle arm 24A facing the mold 12A. The toggle mechanism 20 is also movable parallel to the arrangement direction of the molds 12A and 12B along a diver 18. The movement mechanism 40 is connected to the other end of the toggle arm 24B and moves the toggle mechanism horizontally.

Description

[Technical Field]

[0001] The present invention relates to a molding apparatus. [Background technology]

[0002] A molding device is widely used in which heated resin is injected into a pair of molds, cooled, and solidified to form a product of a predetermined shape.

[0003] Patent Document 1 describes a molding device that reduces the speed fluctuation of deceleration of molds when transitioning from high-speed movement to low-speed movement when closing a pair of molds. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-145614 Summary of the Invention [Problem to be solved by the invention]

[0005] Generally, the thickness of the mold attached to the molding device is set to a predetermined value, and it is difficult to attach a mold of a different thickness.

[0006] 5 shows an example of a conventional molding apparatus 100. The molding apparatus 100 molds a molded product by putting a molding material into a molding space formed by joining a pair of molds 112, which are molds 112A and 112B.

[0007] Mold 112A is attached to mounting plate 114A, which is attached to side plate 116A. Mold 112B is attached to mounting plate 114B. A long, cylindrical dies 118 are inserted into the lower parts of side plate 116A and mounting plate 114B.

[0008] The mounting plate 114B is connected to the toggle mechanism 120. The diver 118 is inserted into the lower part of the toggle mechanism 120, and the toggle mechanism 120 is supported by and fixed to the diver 118. In the toggle mechanism 120, one end of a toggle arm 124A is rotatably connected to one end of a toggle lever 122 having a rotation center, and one end of a toggle arm 124B is rotatably connected to the other end of the toggle lever 122. The other end of the toggle arm 124A is rotatably connected to the mounting plate 114A, and the other end of the toggle arm 124B is rotatably connected to the side plate 116B. The diver 118 is inserted into the lower part of the side plate 116B.

[0009] 5, the positions of the toggle arms 124A, 124B indicated by solid lines are positions where the toggle arms 124A, 124B are horizontal. That is, when clamping the molds 112A, 112B, the toggle arms 124A, 124B rotate, for example, from the position indicated by the two-dot chain line to the horizontal position indicated by the solid line. Note that the circle 126 indicated by the dashed dot line is a line that indicates a trajectory along which the center point of the connection between the toggle arms 124A, 124B and the toggle lever 122 can move.

[0010] When the toggle lever 122 of the toggle mechanism 120 rotates and the toggle arms 124A and 124B become horizontal, the clamping force on the molds 112A and 112B becomes maximum.

[0011] In the molding apparatus 100 configured as described above, the thickness of the mold 112 that can be attached is predetermined. Therefore, regardless of the size of the molded product molded by the molding apparatus 100, the thickness of the mold 112 is constant.

[0012] The present invention aims to provide a molding device that can accommodate molds of various thicknesses. [Means for solving the problem]

[0013] One embodiment of the molding device of the present invention is a molding device that pours molding material into a molding space formed by joining a pair of molds consisting of a first mold and a second mold to mold a molded product, and is equipped with: one end of a first toggle arm rotatably connected to one end of a toggle lever having a rotation center; one end of a second toggle arm rotatably connected to the other end of the toggle lever; the second mold is positioned opposite the first mold at the other end of the first toggle arm; a toggle mechanism that can move parallel to the arrangement direction of the first and second molds; and a movement mechanism that is connected to the other end of the second toggle arm and moves the toggle mechanism parallel to the arrangement direction.

[0014] According to this configuration, the toggle mechanism is movable in the arrangement direction of the first and second molds by the movement mechanism provided at the other end of the second toggle arm. In this way, with this configuration, the toggle mechanism is not fixed but is movable in the arrangement direction of the first and second molds, so molds of various thicknesses can be attached.

[0015] In the above molding apparatus, the movement mechanism may include: an elongated member having one end to which the second toggle arm is connected and a screw thread formed on an outer peripheral surface of the other end thereof so that the second toggle arm can rotate in response to rotation of the toggle lever; and a rotating member having an internal thread formed on an inner peripheral surface thereof that screws into the screw thread formed on the outer peripheral surface of the elongated member and that rotates without changing its position. According to this configuration, by rotating the rotating member that screws into the screw thread formed on the elongated member, the elongated member moves in the direction of arrangement of the toggle mechanism, and the toggle mechanism can be moved via the elongated member.

[0016] In the molding device, the rotating member may have teeth formed on an outer circumferential surface thereof that mesh with a predetermined gear. With this configuration, the rotating member can be easily rotated via, for example, a gear having fewer teeth than the rotating member.

[0017] In the molding device described above, the moving mechanism may include a receiving portion having a through hole through which the elongated member passes and a placement area in which the rotating member is placed, a key groove formed on the outer peripheral surface of the elongated member parallel to the axial direction of the elongated member, and a sliding key fitted into the key groove provided in the through hole. With this configuration, the elongated member can be moved by rotating the rotating member.

[0018] In the above-described forming apparatus, a movement prevention portion for preventing movement of the elongated member may be provided on the other end side of the elongated member. With this configuration, the position of the elongated member can be fixed.

[0019] In the molding device described above, the movement prevention unit may include a main body having an inner circumferential surface formed with a female thread that screws into the thread formed on the outer circumferential surface of the elongated member, and a plurality of handle bars provided radially from the outer circumferential surface of the main body, and the main body and the receiving unit may be brought into contact with or separated from each other by rotating the main body with the handle bars. With this configuration, the position of the elongated member can be fixed with a simple configuration.

[0020] In the molding device, the main body may have a bolt hole formed on an inner peripheral surface thereof, the bolt hole being parallel to the axial direction of the elongated member and penetrating the elongated member. According to this configuration, by inserting a bolt into the bolt hole and abutting an end of the bolt on the receiving portion, rotation of the movement prevention portion can be suppressed and the position of the elongated member can be fixed.

[0021] The molding apparatus may further include a distance sensor for detecting the position of the toggle mechanism, which makes it possible to determine whether the position of the toggle mechanism is appropriate for the thickness of the mold. [Effects of the Invention]

[0022] According to the present invention, molds of various thicknesses can be mounted. [Brief explanation of the drawings]

[0023] [Figure 1]FIG. 2 is a side view of the molding device of the present embodiment. [Figure 2] FIG. 2 is a vertical cross-sectional view of the movement mechanism of the present embodiment. [Figure 3] FIG. 2 is a cross-sectional view of the movement mechanism of the present embodiment. [Figure 4] FIG. 2 is a front view of the moving mechanism of the present embodiment. [Figure 5] FIG. 1 is a side view of a conventional molding device. DETAILED DESCRIPTION OF THE INVENTION

[0024] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below shows an example of how the present invention can be implemented, and the present invention is not limited to the specific configuration described below. When implementing the present invention, specific configurations corresponding to the embodiment may be appropriately adopted.

[0025] 1 is a side view of a molding apparatus 10 of this embodiment. The molding apparatus 10 of this embodiment molds a molded product by putting a molding material into a molding space formed by joining a pair of molds 12 consisting of mold 12A and mold 12B.

[0026] The molding apparatus 10 of this embodiment includes, from the left side in the figure, a side plate 16A, a mounting plate 14A, a mounting plate 14B, a toggle mechanism 20, a side plate 16B, and a moving mechanism 40. Two or three divers 18, which are long, cylindrical members extending in the left-right direction in FIG. 1, are inserted into the bottom of the side plate 16A, the mounting plate 14B, the toggle mechanism 20, and the side plate 16B, and are each supported by the divers 18.

[0027] A base 28 into which the diver 18 is inserted is provided below the toggle mechanism 20. The base 28 has grooves formed therein that fit onto a pair of rails 30. This allows the forming device 10 of this embodiment to move along the rails 30. A plurality of forming devices 10 may be arranged on the rails 30.

[0028] The mold 12A is attached to a mounting plate 14A, which is attached to a side plate 16A. The mold 12B is attached to a mounting plate 14B. The mounting plate 14B is connected to a toggle mechanism 20.

[0029] In the toggle mechanism 20, one end of a toggle arm 24A is rotatably connected to one end of a toggle lever 22 having a rotation center, and one end of a toggle arm 24B is rotatably connected to the other end of the toggle lever 22. The mold 12B is disposed on the other end side of the toggle arm 24A so as to face the mold 12A. In this embodiment, as described above, the mold 12B is attached to the mounting plate 14B connected to the other end of the toggle arm 24A. Meanwhile, the other end of the toggle arm 24B is rotatably connected to the moving mechanism 40. The toggle mechanism 20 is movable parallel to the arrangement direction of the molds 12A and 12B along the diver 18. In the following description, the arrangement direction of the molds 12A and 12B is also referred to as the horizontal direction a.

[0030] 1, the positions of the toggle arms 24A, 24B indicated by solid lines are positions where the toggle arms 24A, 24B are horizontal. That is, when clamping the molds 12A, 12B, the toggle arms 24A, 24B rotate, for example, from the position indicated by the two-dot chain line to the horizontal position indicated by the solid line. The circle 26 indicated by the two-dot chain line is a line that indicates a trajectory along which the center point of the connection between the toggle arms 24A, 24B and the toggle lever 22 can move.

[0031] A motor is connected to the rotation shaft of the toggle lever 22, and this motor rotates the toggle lever 22. When the toggle lever 22 of the toggle mechanism 20 rotates and the toggle arms 24A and 24B become horizontal, the clamping force on the molds 12A and 12B becomes maximum.

[0032] The movement mechanism 40 is connected to the other end of the toggle arm 24B and moves the toggle mechanism 20 parallel to the arrangement direction of the dies 12A, 12B. In this way, in the molding apparatus 10 of this embodiment, the toggle mechanism 20 is not fixed, but is movable in the horizontal direction a by the movement mechanism 40 provided at the other end of the toggle arm 24B, so that dies 12 of various thicknesses can be attached.

[0033] Next, the configuration of the movement mechanism 40 will be described with reference to Figures 2 to 4. Figure 2 is a vertical cross-sectional view of the movement mechanism 40. Figure 3 is a horizontal cross-sectional view of the movement mechanism 40. Figure 4 is a front view of the movement mechanism 40.

[0034] The moving mechanism 40 includes a pusher pin 42 , a first pusher pin nut 44 , and a pusher pin receiving portion 46 .

[0035] The pusher pin 42 of this embodiment is disposed so as to pass through a through-hole 45 formed in the side plate 16B. The pusher pin 42 is an elongated member having one end to which the toggle arm 24B is connected and having a screw thread 43 formed on the outer peripheral surface of the other end so that the toggle arm 24B can rotate in response to rotation of the toggle lever 22. In other words, the pusher pin 42 is a male screw that is connected to the toggle arm 24B, and has a connecting portion 42A at one end to which the toggle arm 24B is connected. As shown in FIG. 3, the connecting portion 42A has a bifurcated shape with notches on the top and bottom surfaces to allow the toggle arm 24B to rotate.

[0036] The first pusher pin nut 44 is a rotating member that has a female thread 48 formed on its inner peripheral surface that screws onto the thread 43 formed on the outer peripheral surface of the pusher pin 42, and that rotates without changing its position. Rotating the first pusher pin nut 44 allows the pusher pin 42 to move in the horizontal direction a. Teeth that mesh with a predetermined gear 50 are formed on the outer peripheral surface of the first pusher pin nut 44. That is, the first pusher pin nut 44 of this embodiment is a spur gear that has a female thread 48 formed on its inner peripheral surface that screws onto the thread 43 of the pusher pin 42. A washer 52 is disposed between the first pusher pin nut 44 and the side plate 16B.

[0037] The gear 50 of this embodiment is, for example, a spur gear with fewer teeth than the first pusher pin nut 44. A regular hexagonal pillar 56 is coupled to the center of the gear 50 so that it can be rotated with a wrench such as a ratchet wrench 54. The gear 50 is also rotatably fixed to the side plate 16B via a bearing 58 and a bearing 60.

[0038] The pusher pin receiving portion 46 has a through hole 62 through which the pusher pin 42 passes, and an arrangement region 64 in which the first pusher pin nut 44 is arranged. The central axis of the through hole 62 formed in the pusher pin receiving portion 46, the central axis of the through hole 45 formed in the side plate 16B, and the central axis of the toggle arms 24A, 24B when held horizontally are coaxial. An upper portion of the pusher pin receiving portion 46 is fixed to the side plate 16B with a bolt 68.

[0039] A key groove 70 is formed on the outer peripheral surface of the pusher pin 42 parallel to the axial direction. A sliding key 72 that fits into the key groove 70 is provided in the through hole 62 of the pusher pin receiving portion 46. The sliding key 72 is fixed to the pusher pin receiving portion 46 with a bolt 74. The key groove 70 and the sliding key 72 allow the pusher pin 42 to move horizontally without rotating.

[0040] In the moving mechanism 40 configured as described above, the first pusher pin nut 44 rotates when the gear 50 is rotated with a ratchet wrench 54 or the like, and the pusher pin 42 moves horizontally in response to the rotation of the first pusher pin nut 44. Then, in response to the horizontal movement of the pusher pin 42, the toggle arm 24B connected to the pusher pin 42, i.e., the toggle mechanism 20, moves horizontally along the diver 18.

[0041] When the toggle mechanism 20 moves horizontally, the mounting plate 14B connected to the toggle lever 22A moves horizontally, so that molds 12 of various thicknesses can be attached to the molding device 10.

[0042] The molding apparatus 10 of this embodiment also includes a distance sensor 76 for detecting the position of the toggle mechanism 20. The distance sensor 76 of this embodiment is, for example, disposed at the connecting portion 42A of the pusher pin 42, and measures the distance between the connecting portion 42A and the side plate 16B (hereinafter referred to as the "measured distance").

[0043] The measured distance is used to determine whether it is appropriate for the thickness of the mold 12 attached to the molding apparatus 10. This determination may be made by an operator checking the measured distance, or a computer connected to the distance sensor 76 may determine whether the measured distance for the mold 12 is appropriate. Furthermore, if the measured distance is not appropriate, an interlock may be activated to prevent, for example, the toggle lever 22 from rotating.

[0044] Furthermore, the molding apparatus 10 of this embodiment is provided with a synchronization rack gear for preventing the position where the mold 12A and the mold 12B contact each other, that is, the center position, from changing even if the horizontal position of the toggle mechanism 20 changes.

[0045] Further, a movement prevention portion 80 for preventing the movement of the pusher pin 42 is provided on the other end side of the pusher pin 42 in this embodiment.

[0046] The movement prevention unit 80 includes a first pusher pin nut 82 and a handle bar 84. The first pusher pin nut 82 is a main body portion having a female thread 86 formed on its inner peripheral surface that screws into the thread 43 formed on the outer peripheral surface of the pusher pin 42. A plurality of handle bars 84 are provided radially from the first pusher pin nut 82. By rotating the first pusher pin nut 82 using the handle bar 84, the first pusher pin nut 82 and the pusher pin receiver 46 come into contact with or separate from each other. Note that a washer 88 is provided between the first pusher pin nut 82 and the pusher pin receiver 46, but the washer 88 need not be provided.

[0047] 5, when the movement prevention portion 80 of this embodiment rotates clockwise b, the first pusher pin nut 82 and the pusher pin receiving portion 46 come into contact with each other via the washer 88. This fastens the first pusher pin nut 82 and the pusher pin receiving portion 46 together, resulting in a locked state. As a result, the pusher pin 42 cannot move horizontally.

[0048] On the other hand, by rotating the movement prevention portion 80 counterclockwise c, the first pusher pin nut 82 and the pusher pin receiving portion 46 are separated from each other. This releases the lock on the pusher pin 42, allowing the pusher pin 42 to move.

[0049] Furthermore, the first pusher pin nut 82 has a bolt hole 90 with a female thread formed on its inner circumferential surface, which is formed parallel to the axial direction of the pusher pin 42 and passes through the first pusher pin nut 82. According to this configuration, by inserting a bolt 92 into the bolt hole 90 and abutting the end of the bolt 92 against the pusher pin receiving portion 46, rotation of the movement preventing portion 80 can be suppressed and the position of the pusher pin 42 can be fixed. In other words, the bolt 92 has a function of preventing the movement preventing portion 80 from loosening. Note that, as an example, a plurality of bolt holes 90 are formed; in this embodiment, nine bolt holes are formed, and the nine bolts 92 prevent the movement preventing portion 80 from loosening.

[0050] Therefore, when moving the toggle mechanism 20 horizontally, the bolt 92 of the movement prevention part 80 is loosened to set the movement prevention part 80 in a rotatable state. Then, by rotating the movement prevention part 80 counterclockwise c, the lock on the pusher pin 42 is released, and the pusher pin 42 is set in a horizontally movable state.

[0051] In the molding apparatus 10 of this embodiment, by rotating the ratchet wrench 54 clockwise, the first pusher pin nut 44 rotates counterclockwise, and the pusher pin 42 moves toward and pushes the toggle mechanism 20. This movement of the pusher pin 42 narrows the gap between the mounting plates 14A, 14B. In other words, this is an adjustment when a thin mold 12 is attached to the molding apparatus 10.

[0052] On the other hand, in the molding apparatus 10 of this embodiment, rotating the ratchet wrench 54 counterclockwise rotates the first pusher pin nut 44 clockwise, causing the pusher pin 42 to move in the opposite direction to the direction of the toggle mechanism 20, thereby pulling the toggle mechanism 20. Such movement of the pusher pin 42 widens the gap between the mounting plates 14A, 14B. In other words, this is an adjustment when a thick mold 12 is attached to the molding apparatus 10.

[0053] After the position of the toggle mechanism 20 is determined, the movement prevention part 80 is rotated clockwise to lock it, preventing horizontal movement of the pusher pin 42. Then, the bolt 92 of the movement prevention part 80 is tightened to prevent rotation of the movement prevention part 80.

[0054] Then, the desired molds 12A, 12B are attached to the attachment plates 14A, 14B, and then the toggle arms 24A, 24B of the toggle mechanism 20 are set horizontally to clamp the molds.

[0055] Although the present invention has been described using the above embodiment, the technical scope of the present invention is not limited to the scope described in the above embodiment. Various modifications or improvements can be made to the above embodiment without departing from the gist of the invention, and such modifications or improvements are also included in the technical scope of the present invention.

[0056] In the above embodiment, the first pusher pin nut 44 is rotated by the gear 50, but the present embodiment is not limited to this. For example, the first pusher pin nut 44 may be rotated by a method other than the gear 50.

[0057] In the above embodiment, the movement prevention unit 80 is configured by the first pusher pin nut 82 and the plurality of handle bars 84, but this embodiment is not limited to this. The movement prevention unit 80 may have another configuration as long as it can prevent the pusher pin 42 from moving.

[0058] In the above embodiment, the first pusher pin nut 44 is manually rotated using a ratchet wrench 54 or the like, but the present embodiment is not limited to this. For example, the first pusher pin nut 44 may be rotated by connecting a drive source such as a motor to the rotation shaft of the gear 50. [Explanation of symbols]

[0059] 10 Molding equipment 20 Toggle mechanism 22 Toggle lever 24A toggle arm 24B toggle arm 40 Moving mechanism 42 Pusher pin (long member) 44 First pusher pin nut (rotating member) 46 Pusher pin receiving part (receiving part) 50 gears 70 keyway 72 Sliding Key 76 Distance Sensor 80 Movement prevention part 82 First pusher pin nut (main body) 84 Handlebars

Claims

1. A molding apparatus that molds a molded product by pouring a molding material into a molding space formed by joining a pair of molds consisting of a first mold and a second mold, a toggle mechanism in which one end of a first toggle arm is rotatably connected to one end of a toggle lever having a rotation center, one end of a second toggle arm is rotatably connected to the other end of the toggle lever, the second mold is disposed on the other end side of the first toggle arm so as to face the first mold, and the toggle mechanism is movable in parallel to the direction in which the first mold and the second mold are disposed; a movement mechanism connected to the other end of the second toggle arm and configured to move the toggle mechanism parallel to the arrangement direction; A molding device comprising:

2. The moving mechanism includes: an elongated member having one end to which the second toggle arm is connected and having a screw thread formed on an outer peripheral surface of the other end such that the second toggle arm can rotate in response to rotation of the toggle lever; a rotating member having an inner circumferential surface formed with a female screw that screws into the thread formed on the outer circumferential surface of the elongated member, and that rotates without changing its position; The molding apparatus of claim 1 , comprising:

3. The outer circumferential surface of the rotating member is formed with teeth that mesh with a predetermined gear. The molding apparatus according to claim 2 .

4. The moving mechanism includes: a receiving portion having a through hole through which the elongated member passes and an arrangement area in which the rotating member is arranged, a key groove is formed on the outer peripheral surface of the elongated member in parallel with the axial direction of the elongated member; The through hole is provided with a sliding key that fits into the key groove. The molding apparatus according to claim 2 or 3.

5. The molding device according to claim 4 , further comprising a movement prevention portion provided on the other end side of the elongated member to prevent movement of the elongated member.

6. The movement prevention portion is a main body having an internal thread formed on an inner peripheral surface thereof, the internal thread engaging with the thread formed on the outer peripheral surface of the elongated member; a plurality of handlebars provided radially from the outer circumferential surface of the main body; Equipped with By rotating the main body portion using the handlebar, the main body portion and the receiving portion come into contact with or separate from each other. The molding apparatus according to claim 5.

7. The molding device according to claim 6 , wherein the main body portion has a bolt hole with a female thread formed on an inner peripheral surface thereof, the bolt hole being parallel to the axial direction of the elongated member and penetrating the elongated member.

8. The molding apparatus according to claim 1 or claim 2, further comprising a distance sensor for detecting the position of the toggle mechanism.

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