Injection molding machine

Abstract

An injection molding machine (1) includes: a mold clamping unit (10); an injection unit (20); and a safety cover (100) that surrounds the mold clamping unit and the injection unit. The safety cover includes: a detachable panel (260) that is detachably mounted on an opening that exposes at least one of the mold clamping unit and the injection unit to the outside and closes a first part that is a part in the width direction of the opening; and a door part (240) that is supported so as to be movable along the width direction of the opening between a position closing the remaining second part of the opening and a position detaching from the opening. The door part is smaller than the opening and larger than the second part. The detachable panel has a first stopper (270) that restricts the opening movement of the door part by abutting against the door part at a position where only the second part is opened. A second stopper (271) is provided on the safety cover, and in a state where the detachable panel is removed, it restricts the opening movement of the door part by abutting against the door part at a position opening the entire width of the opening.

Description

Technical Field

[0001] The invention relates to an injection molding machine. Background Art

[0002] An injection molding machine is known, comprising: a cover that covers the periphery of a clamping device and an injection device; an opening portion that is provided on the cover; and a safety door that is supported so as to be slidable in the opening and closing direction of the mold of the clamping device and to open and close the opening portion (for example, refer to Patent Document 1).

[0003] When maintenance work on the mold clamping device and the injection device is performed, the safety door is slid to open the opening, thereby exposing a portion of the mold clamping device or the injection device disposed inside the cover to the outside.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2020-6633 Summary of the invention

[0007] Problems to be solved by the invention

[0008] During maintenance work, when rotating or moving the mold clamping device or the injection device, there are cases where sufficient working space cannot be ensured even when the safety door is slid to fully open the opening.

[0009] Furthermore, if the width of the opening is set to be large, the safety door must also be enlarged to match the width of the opening, which deteriorates the operability of the safety door.

[0010] Therefore, it is desired to improve the ease of maintenance work while preventing the safety door from becoming larger.

[0011] Means used to solve problems

[0012] One aspect of the present invention is an injection molding machine, comprising: a mold clamping unit that opens and closes a mold; an injection unit that injects a molding material into the mold; and a safety cover that surrounds the mold clamping unit and the injection unit. The safety cover includes: a detachable panel that is detachably mounted on an opening that exposes at least one of the mold clamping unit and the injection unit to the outside, and closes a first part that is a part in the width direction of the opening; and a door portion that is supported so as to be movable along the width direction of the opening between a position where the remaining second part of the opening is closed and a position where it disengages from the opening. The door portion is smaller than the opening and larger than the second part. The detachable panel has a first stopper that restricts the movement of the door portion in the opening direction by abutting against the door portion at a position where only the second part is opened. A second stopper is provided on the safety cover. In a state where the detachable panel is removed, the second stopper restricts the movement of the door portion in the opening direction by abutting against the door portion at a position where the first part and the second part are opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is an overall structural diagram of an injection molding machine according to an embodiment of the present invention.

[0014] Figure 2 is a view showing Figure 1 the overall structural diagram of the state where the second parts of the openings on the mold clamping unit side and the injection unit side in the injection molding machine are opened.

[0015] Figure 3 is a view showing Figure 1 the overall structural diagram of the state where the first part and the second part of the opening on the injection unit side in the injection molding machine are opened.

[0016] Figure 4 is a view showing Figure 1 the enlarged perspective view of the state where the detachable panel is mounted in the injection molding machine.

[0017] Figure 5 is a view showing Figure 1 the enlarged perspective view of the state where the detachable panel is removed in the injection molding machine.

[0018] Figure 6 is a view showing Figure 3 the enlarged top view of the state where one fixed panel is removed in the injection molding machine.

[0019] Figure 7 is a view showing the state after rotating the injection unit of the injection molding machine in Figure 6 the enlarged top view. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Hereinafter, with reference to the drawings, an injection molding machine 1 according to an embodiment of the present invention will be described.

[0021] As Figure 1 shown, the injection molding machine 1 according to the present embodiment includes a clamping unit 10, an injection unit 20, and a safety cover 100 that surrounds the clamping unit 10 and the injection unit 20 in a full circle.

[0022] The clamping unit 10, the injection unit 20, and the safety cover 100 are respectively fixed to a base 2 provided on a horizontal ground.

[0023] The clamping unit 10 includes a mold and a clamping device that opens and closes the mold.

[0024] The injection unit 20 includes: a cylinder that melts a molding material; a nozzle that injects the melted molding material into the mold; and a supply device that supplies the molding material to the cylinder.

[0025] As Figures 1 to 3 shown, the safety cover 100 includes a frame 110 that is disposed at a position surrounding the clamping unit 10 and the injection unit 20; and a plurality of fixed panels 120 fixed to the frame 110. An opening 130 is provided on the side of the clamping unit 10 where the fixed panel 120 is not fixed, and a part of the clamping unit 10 is exposed to the outside. The safety cover 100 includes a safety door 140 that can open and close to block the opening 130.

[0026] A guide rail 150 extending horizontally in the width direction of the opening 130 is fixed to the frame 110. The safety door 140 is supported by rollers (not shown in the figure) that roll on the guide rail 150 so as to be movable in the length direction of the guide rail 150.

[0027] Furthermore, an opening 230 is provided on the side of the injection unit 20 where the fixed panel 120 is not fixed, and a part of the injection unit 20 is exposed to the outside. The safety cover 100 includes, at a position blocking a first part 231 that is a part of the width direction of the opening 230: a detachable panel 260 that is detachably mounted on the frame 110; and a safety door (door part) 240 that can open and close to block the remaining second part 232 in the width direction.

[0028] Guide rails 250, 251 extending horizontally in the width direction of the opening 230 are respectively fixed above and below the opening 230 on the frame 110. Both the guide rails 250, 251 protrude and extend longer than the width dimension of the safety door 240 to the outside of one side in the width direction of the opening 230.

[0029] The safety door 240 is supported by rollers (not shown in the figure) that roll on the guide rails 250 and 251 so as to be movable along the length directions of the guide rails 250 and 251.

[0030] In addition, as Figure 4 and Figure 5 shown, a through hole 252 that opens to the side of the guide rail 251 is provided in the frame 110.

[0031] As Figure 2 and Figure 4 shown, a first stopper 270 is provided on the detachable panel 260, and the first stopper 270 is disposed on the rail 251 in a state of being mounted at a position that closes the first part 231.

[0032] When the detachable panel 260 is mounted on the frame 110 from the side of the rail 251, the first stopper 270 passes through the through hole 252 and is disposed on the rail 251.

[0033] The first stopper 270 restricts the further movement of the safety door 240 in the opening direction by abutting against the safety door 240 that has moved to a position where the second part 232 of the opening 230 is fully opened.

[0034] That is, in a state where the detachable panel 260 is mounted, the safety door 240 can open and close the second part 232 of the opening 230, and at a position where the second part 232 is fully opened, the further opening operation is restricted by the first stopper 270.

[0035] On the other hand, when the detachable panel 260 is removed, the first stopper 270 is removed from the rail 251 together with the detachable panel 260, so that the safety door 240 becomes a state where it can move further beyond the position where the second part 232 is fully opened.

[0036] As Figure 3 and Figure 5 shown, a second stopper 271 is fixed on the rail 251.

[0037] In a state where the detachable panel 260 is removed, the second stopper 271 restricts the further movement of the safety door 240 in the opening direction by abutting against the safety door 240 that has moved to a position where the opening 230 is fully opened.

[0038] That is, in a state where the detachable panel 260 is removed, at a position where the opening 230 is fully opened, the further opening operation of the safety door 240 is restricted by the second stopper 271.

[0039] Hereinafter, the operation of the injection molding machine 1 according to the present embodiment configured as described above will be described.

[0040] When injection molding is performed by the injection molding machine 1, a detachable panel 260 is installed on the first part 231 of the opening 230 of the safety cover 100. Then, the opening 130 is closed by the safety door 140, and the second part 232 of the opening 230 is closed by the safety door 240. Thus, as Figure 1 shown, the outer peripheries of the clamping unit 10 and the injection unit 20 are surrounded by the safety cover 100 over the entire circumference.

[0041] For performing operations required during injection molding, such as taking out the molded product from the injection molding machine 1, as Figure 2 shown, the openings 130 and 230 are opened through the safety doors 140 and 240, so that a part of the clamping unit 10 or the injection unit 20 is exposed to the outside.

[0042] On the other hand, when performing maintenance operations such as cleaning and replacement of the injection unit 20, as Figure 3 and Figure 6 shown, the detachable panel 260 is removed from the frame 110 to open the first part 231 of the opening 230. Then, the safety door 240 is moved to a position where it abuts against the second stopper 271 to make the opening 230 fully open.

[0043] In this state, as Figure 7 shown, by rotating the injection unit 20 around a predetermined axis extending in the vertical direction, the maintenance part of the injection unit 20 can be brought closer to the opening 230 side, so that the maintenance part can be more exposed to the outside.

[0044] At this time, when rotating the injection unit 20, if there are fixed panels 120 that constitute an obstacle, they can also be removed.

[0045] In this way, according to the injection molding machine 1 of the present embodiment, when performing injection molding operations, the opening range of the opening 230 can be suppressed to the second part 232 that is the minimum required, and the width dimension of the safety door 240 can also be suppressed to the minimum size required for opening and closing the second part 232. Moreover, when performing maintenance, by removing the detachable panel 260, the first part 231 and the second part 232 can be opened, and the injection unit 20 can be more exposed, improving the ease of maintenance operations.

[0046] In addition, in the present embodiment, since the first stopper 270 and the second stopper 271 are arranged on the same straight line along the moving direction of the safety door 240, the same part of the safety door 240 can be abutted against the first stopper 270 and the second stopper 271.

[0047] Thereby, it has the advantages of being able to define the strengthening part when colliding with the two stoppers 270 and 271 and simplifying the structure of the safety door 240.

[0048] Moreover, by covering the sides of the track 251 where the two stoppers 270 and 271 are disposed with the detachable panel 260 and the fixed panel 120, the two stoppers 270 and 271 can be disposed at positions not easily accessible to the operator.

[0049] Therefore, it also has the advantage of preventing the operator from erroneously removing the first stopper 270 or the second stopper 271.

[0050] In the present embodiment, the detachable panel 260 is disposed at a position corresponding to a part in the width direction of the opening 230 that closes the injection unit 20 side, but instead of or in addition to this, it may also be disposed at a position corresponding to a part in the width direction of the opening 130 that closes the mold clamping unit 10 side.

[0051] Thus, for the safety door 140, even without increasing the width dimension, when performing maintenance work on the mold clamping unit 10, the mold clamping unit 10 can be more exposed to the outside.

[0052] Therefore, it is possible to simultaneously prevent the operability of the safety door 140 from deteriorating and improve the maintainability of the mold clamping unit 10.

[0053] In addition, in the present embodiment, only one detachable panel 260 is provided to close a part in the width direction of the opening 230, but instead of this, a plurality of detachable panels 260 arranged adjacent to each other may be provided along the width direction of the opening 230.

[0054] In this case, according to the content of the work on the injection unit 20, the width dimension of the first part 231 to be opened can be gradually changed by changing the number of detachable panels 260 removed from the frame 110.

[0055] Therefore, it has the following advantages: the opening range of the opening 230 can be adjusted according to the content of the work on the injection unit 20, and the work efficiency during maintenance of the injection unit 20 can be further improved.

[0056] In addition, in the present embodiment, the first stopper 270 and the second stopper 271 are disposed on the track 251. The positions of the two stoppers 270 and 271 are not limited thereto, and as long as the opening movement of the safety door 240 can be restricted at a position where the second part 232 and the opening 230 are fully opened, they may be disposed at any position.

[0057] In this case, by setting the two stoppers 270 and 271 at positions not easily accessible to the operator, it is possible to prevent the operator from erroneously removing the two stoppers 270 and 271.

[0058] Description of Reference Numerals

[0059] 1: Injection molding machine

[0060] 10: Clamping unit

[0061] 20: Injection unit

[0062] 100: Safety cover

[0063] 130: Opening

[0064] 230: Opening

[0065] 231: First part

[0066] 232: Second part

[0067] 240: Safety door (door part)

[0068] 260: Demountable panel

[0069] 270: First stop

[0070] 271: Second stop

Claims

1. An injection molding machine, comprising: A mold clamping unit that opens and closes a mold; An injection unit that injects a molding material into the mold; And A safety cover that surrounds the mold clamping unit and the injection unit, The safety cover includes: a detachable panel that is detachably mounted on an opening that exposes at least one of the mold clamping unit and the injection unit to the outside, and closes a first part that is a part in the width direction of the opening; And a door portion that is supported so as to be movable between a position closing the remaining second part of the opening and a position separated from the opening along the width direction of the opening, the door portion being smaller than the opening and larger than the second part, The detachable panel has a first stopper that restricts the movement of the door portion in the opening direction by abutting against the door portion at a position where only the second part is opened. A second stopper is provided on the safety cover. In a state where the detachable panel is removed, the second stopper restricts the movement of the door portion in the opening direction by abutting against the door portion at a position where the first part and the second part are opened.

2. The injection molding machine according to claim 1, wherein, The opening is provided at a position where the injection unit is exposed to the outside.

3. The injection molding machine according to claim 1, wherein, The opening is provided at a position where the mold clamping unit is exposed to the outside.

4. The injection molding machine according to any one of claims 1 to 3, wherein, In a state where the detachable panel is installed, the first stopper and the second stopper are arranged on the same straight line extending in the width direction of the opening.

5. The injection molding machine according to any one of claims 1 to 3, which includes a plurality of the detachable panels.

6. The injection molding machine according to claim 4, which includes a plurality of the detachable panels.

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