JPH0741556Y2 - Injection molding machine spray device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is a spray of a molding machine that sprays a release agent onto the molding surfaces of both fixed and movable molds in a molding machine such as a die casting machine and a plastic injection molding machine. Regarding the device.

[Prior Art] Conventionally, as shown in FIG. 4, a spray device 10 includes a fixed mold 12 and a movable mold 12 on an arm 11 of a robot or the like attached to the tip of a transfer device (not shown) of the robot or the like. Molding surface 12 of mold 13
A spray main body 9 to which a spray nozzle 17 for spraying a release agent or the like is attached to A and 13A is fixed, and the spray main body 9 is carried between both molds 12 and 13, and both molds 12, The structure was such that the release agent and the like were sprayed from the spray nozzle 17 while being stopped at a substantially central position of 13.

[Problems to be solved by the invention] However, this type of spray device has both fixed and movable molds.
When any of the molding surfaces 12A and 13A of 12 and 13 is deeply dug as shown by the dimension H as shown in FIG. 4, the distance L ₂ from the spray nozzle 17 becomes too large and the distance is completely removed. It becomes impossible to adhere to the mold by spraying mold agent.

In such a case, the spray device 10 was moved toward the moving mold 13 by the stroke E and then sprayed from the spray nozzle 17. Therefore, the operation time of the spray device 10 becomes long, and the fixed mold 12 and the movable mold 13 are individually sprayed, so that there is a drawback that the spray required time is increased.

An object of the present invention is to improve productivity by shortening the spraying time and to ensure that the release agent or the like is attached to the mold by spraying.

[Means for Solving the Problems] In order to achieve the above object, a spray head for a fixed mold and a movable mold is provided, and the mold is carried in and out between the fixed mold and the movable mold, and the mold surface is released. In a spray device of an injection molding machine for spraying agents, it is attached to an intermediate frame attached to a transfer device such as a robot and a plurality of guide bars slidably attached to the intermediate frame and moving in a mold opening / closing direction. And a second spray head that move in parallel with respect to the intermediate frame, and a stopper that is screwed to the first spray head and the second spray head and that sets the position of the closing limit of these spray heads with respect to the intermediate frame. And a toggle mechanism that is connected to a protrusion provided on the first spray head and the second spray head with a pin, and the first spray head and the second spray head screwed to the intermediate frame. A stopper screw that adjusts the stroke of the spray head and a toggle mechanism are pivotally supported, and the first spray head and the second spray head that are located between the fixed mold and the movable mold are close to the molding surfaces of both the fixed and movable molds. It is characterized in that it comprises an actuator for driving.

[Operation] Since the spray head is attached to the molding surface of the fixed mold and the movable mold in parallel with the intermediate frame attached to the tip of the conveying device of the spray device, the stroke with respect to the molding surface can be adjusted. It is possible to spray the release agent or the like by optimally setting the distance between the spray nozzle and each molding surface of the fixed mold and the movable mold.

[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 is a sectional view of the essential parts of the spray device of the present invention.
It shows a state of being inserted into the mold opening, and those having the same functions as those in FIG. 4 are denoted by the same reference numerals, and the description thereof will be simplified or omitted. An intermediate frame 14 is fixed to an arm 11 attached to the tip of a transfer device (not shown) such as a robot. 15 is the first located on the molding surface 12A side of the fixed mold 12.
A spray head, 16 is a second spray head located on the molding surface 13A side of the movable mold 13, and these spray heads 15, 16 are slidable on a plurality of linear ball bearings 19 mounted on the intermediate frame 14. Guide bar supported by 2
The molds 12 and 13 fixed to 0 and 20 are vertically movable with respect to the molding surfaces 12A and 13A of the fixed and movable molds 12 and 13, respectively. The guide bars 20, 20 and the linear ball bearing 19 which respectively support the first and second spray heads 15, 16 are shown in only one place, and the other parts are omitted. Reference numeral 17 denotes a plurality of spray nozzles attached to the spray heads 15 and 16, respectively, and the release agent and the air supplied to these spray nozzles 17 are supplied to the spray heads 15 and 16 by a supply passage ( (Not shown) is supplied from a supply source via a hose 18. 21 is a toggle mechanism, one side of which is pins 24, 25 on protrusions 22, 23 provided on the first and second spray heads 15, 16.
The clevis-shaped cylinder (hereinafter referred to as cylinder) 26 has a piston rod 26a and a pin 27 on the other side.
Are connected via. The cylinder 26 is pivotally supported on the intermediate frame 14 via a pin 28. 29, 29A is the first
And nuts 30 and 30A screwed onto the second spray heads 15 and 16
With the stoppers attached to the first and second spray heads 15 and 16, the head ends of the bolts 31 screwed to the intermediate frame 14 are brought into contact with the tips of the stoppers 29 and 29A, and the first and second spray heads. Intermediate frame 14 at the limit of 15 and 16 closed
And the distances F and G are set respectively. Incidentally, the stoppers 29, 29A directly without contacting the bolt 31,
It may abut on the intermediate frame 14. (See FIG. 2) Further, the distances F and G depend on the stopper 29,
The protruding length of 29A can be adjusted. Reference numerals 32 and 34 denote stopper screws loosely fitted to the first spray heads 15 and 16 and screwed to the intermediate frame 14, and are first and second spray heads 15 and 16.
Are moved to the fixed and movable molds 12 and 13, respectively, and are attached to the intermediate frame 14 by nuts 33 and 35 for setting strokes S1 and S2 at the open ends of the molds 12 and 13, respectively. The stroke S2 of the first spray head 15 is set to the distance F.
This can be done by screwing the stopper screw 32 into the intermediate frame 14. In this embodiment, the stroke S2 of the first spray head 15 on the fixed mold 12 side is the moving mold.
Although it is smaller than the stroke S1 of the second spray head 16 on the 13 side, the stopper screws 32 and 34 are replaced by the shapes of the fixed and moving molds 15 and 16, respectively, and attached to the intermediate frame. It is possible to make the stroke S2 of the first spray head 15 larger than the stroke S1 of the second spray head 16. The stalks S1 and S2 can be adjusted by screwing stopper screws 32 and 34 into the intermediate frame.

Next, the operation of the spray device of the present invention will be described. As shown by the solid line in FIG. 1, the cylinder 26 retracts (rightward in the drawing) to contract the first play head 15 and the second spray head 16 toward the intermediate frame 14 side, and these spray heads 15,
The distances F and G at the closing limit of 16 are set and held by the stoppers 29 and 29A, and they are carried in between the fixed and movable molds 12 and 13 for mold opening.

Next, as shown by the solid line in FIG. 3, when the cylinder 26 advances (leftward in the drawing) to deploy the toggle mechanism 21, the first spray head 15 moves from the minimum distance F to the intermediate frame 14. and moving stroke S2 of regulated by the stopper screw 32 stops at the proper distance L1 relative to the fixed mold 12, while the second spray head 16 is moving stroke S ₁ to regulate in Sutotsupaneji 34 from the minimum distance G with respect to the intermediate frame 14 Then, when the proper distance L2 with respect to the moving mold 13 is approached, the first and second
The spray heads 15 and 16 are the molding surfaces of the fixed mold 12, respectively.
The mold release agent is sprayed while maintaining proper distances L1 and L2 with respect to 12A and the molding surface 13A of the moving mold 13 and operating the arm 11 of the spray device 10 in the loading / unloading direction as necessary.
When the spray of the release agent is completed, the cylinder 26 retracts to close the toggle mechanism 21 to return to the state shown by the solid line in FIG. 1, and the intermediate frame 14 is operated to operate the first and second spray heads 15 and 16.
Is discharged from both molds 12 and 13.

[Effects of the Invention] The present invention has a structure in which the first spray head and the second spray head are movable with respect to the molding surfaces of both fixed and movable molds, and the spray head is formed on the molding surface regardless of the shape of the molding surface. Spraying the mold release agent close to each other shortens the spray operation time and improves productivity, and ensures that the mold release agent etc. adheres to the molding surface by optimally setting the distance between the spray nozzle and the mold. Can be

[Brief description of drawings]

1 is a side view including a sectional view of an embodiment of the present invention, and FIG. 2 is a partial sectional view of a modified embodiment in which the stoppers 29, 29A of FIG. Fig. 4 is a side view of the toggle mechanism of Fig. 1 in an expanded state, and Fig. 4 is a side view of a conventional spray device. 9 ... Spray body, 10 ... Spray device, 11 ... Arm, 12 ... Fixed die, 13 ... Moving die, 14 ... Intermediate frame, 15 ... First spray head, 16 ... Second Spray head, 17 …… Spray nozzle, 18 …… Hose, 19 ……
Linear ball bearing, 20 …… guide bar, 21 …… toggle mechanism, 22,23 …… projection, 24,25 …… pin, 26 …… clevis type fluid pressure cylinder, 26a …… piston rod, 2
7, 28 …… Pin, 29, 29A …… Stopper, 31 …… Bolt,
32,34 …… Stopper screw, 30,30A, 33,35 …… Nut.

Claims (1)

[Scope of utility model registration request] 1. A spray device of an injection molding machine, comprising a spray head for a fixed mold and a spray head for a movable mold, carrying in and out between a fixed mold and a movable mold, and spraying a mold release agent on a molding surface of these molds. A first intermediate frame mounted on a transfer device such as a robot and a plurality of guide bars slidably mounted on the intermediate frame and moving in a mold opening / closing direction to move in parallel to the intermediate frame. Spray head and second
A spray head, a stopper screwed to the first spray head and the second spray head to set the position of the closing limit of these spray heads with respect to the intermediate frame, and provided on the first spray head and the second spray head. A toggle mechanism coupled to the protrusion by a pin, a stopper screw screwed to the intermediate frame to adjust strokes of the first spray head and the second spray head, and the fixed mold and the movable mold pivotally supported by the toggle mechanism. A spray device for an injection molding machine, comprising an actuator that brings the first spray head and the second spray head located between the molds close to the molding surfaces of the fixed and movable molds.