JPS5847932B2 - Film feeding device in vacuum mold making equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a film feeding device in a vacuum mold making apparatus used when producing a vacuum mold by reducing the pressure in the flask and solidifying the filler in the flask. .

Conventionally, the film used to form a shielding film when molding a vacuum mold is usually a film that is wound into a roll around a core. Each time the roll is finished, the core is removed and a new roll of film is replaced.In order to replace the roll of film, the operator must remove the used core from the installation position and then install a new roll of film. The end of the film is pulled out and set in the film drawer.

For this reason, a worker was required to change the roll of film, making automation impossible in vacuum molding (a major drawback).

In view of the current situation, the present invention has been completed with the object of providing a film feeding device for a vacuum mold making device that is capable of continuously and automatically feeding and setting a roll of film to a film extrusion device. To explain the embodiment in detail below, in FIG. 1, a hood 3 with a built-in heater 2 is provided facing downward on the left-side ceiling of the gate-shaped frame 1. A fan 4 is provided to send air to the hood, and fins 5 are provided on the inner surface of the hood 3 to send out air uniformly.

Furthermore, a turntable 7 that is raised and lowered by a cylinder (not shown) is disposed below the hood 3, facing the hood 3, and a pattern plate 8 equipped with a film suction mechanism (not shown) is attached to the turntable 7. It is being

In addition, a pair of chain wheels 9, 9' are provided on the right side of the ceiling of the gate-shaped frame 1 at appropriate intervals in the front and rear. 10 is turned around, and both ends of the chain 100 are connected endlessly via a suction plate 11 which is switchably connected to a suction machine (not shown).

Further, either one of the chain wheels 9, 9' is engaged with a rotating wheel 13 of a motor 120 provided on the ceiling of the portal frame 1, which rotates forward and backward, via an endless band 14 so as to transmit rotation.

That is, the suction plate 11 is provided so that it can be moved back and forth between the chain wheels 9 and 9' by the forward and reverse rotation of the motor 12.

Note that the lower end of the suction plate 11 is provided so as to protrude downward to a position that substantially coincides with the lower surface of the ceiling of the gate-shaped frame 1.

Further, the chain wheels 9, 9 of the bolt-shaped frame 1
A film stretching plate 16 that is movable up and down by a cylinder 15 is provided at the lower side of the gap between the two. A member 17 is attached, and a fixed suction plate 19 is provided on the right end, that is, the rear end of the suction member 17 via an arm 18 at an appropriate interval.

Further, a cutter cylinder 20 having a nichrome wire attached to its lower end is disposed at a position above the suction member 17 and the fixed suction plate 19 in the portal frame 1.

Furthermore, a film drawer trolley 21 is provided on the ceiling of the gate-shaped frame 1, and is movable back and forth between the pattern plate 8 and the upper part of the film extension plate 16. 16 suction members 17
It has a rectangular planar shape corresponding to the above, and is equipped with a film suction mechanism on the periphery of its lower surface.

Further, on the right outer side of the gate-shaped frame 1, the gate-shaped frame 1
A walking beam conveyor 22 with a shorter height is installed, and the walking beam conveyor 22 is composed of a fixed frame 23 and a walking beam 24, and the fixed frame 23 has two gate-shaped frames spaced apart at an appropriate interval. The fixed frame 23 is arranged parallel to the
Recesses 26 are provided at appropriate intervals in the ceiling of the roll-shaped film for receiving square shaft portions formed at both ends of the core opening of the roll-shaped film.

The winding core opening of the roll-shaped film has a rectangular shaft part C at the center of the part protruding from both ends of the film, and a circular shaft part C at both ends. A pair of bearings 29 and a pair of bearings 29' are arranged at an appropriate interval in the same direction as the interval between the pair of fixed frames 23, and a pair of bearings 29' are arranged at an appropriate interval on the left and right. A rotating shaft 31 to which a chain wheel 30 is fixed is supported, respectively, and one ends of two arms 32 are respectively fixed to the rotating shaft 31 at appropriate intervals.

Further, the chain wheel 30 is engaged with a chain wheel 34 of a deceleration motor 33 provided at the lower part of the fixed frame 23 via an endless chain 35.

In other words, the two rotating shafts 3 are driven by the deceleration motor 33.
1 is rotated, and the four arms 32 are simultaneously rotated accordingly.

Further, the lower end of a walking beam 24 is connected to the tip of the arms 32, 32, and the upper part of the walking beam 24 has a projecting piece provided with a recess corresponding to the four parts 26 of the fixed frame 23. 37 is provided, and the projecting piece 37 can perform a circular movement by rotation of the arm 32 and engage with the square shaft part C of the rolled film on the fixed frame 23.

Furthermore, a pair of bearings 38 are provided at the lower right end position of the gate-shaped frame 1 at an appropriate distance in the front and rear. A rotating shaft 39 is supported on the rotating shaft 39, and a pair of left and right rotating arms 40 are mounted on the rotating shaft 39 so that the width thereof is slightly larger than the width of the rolled film. They are fixed at their centers at wide intervals.

Alternatively, as shown in FIG. 4, a support member 42 is rotatably attached to the inside of both ends of the rotary arm 400 via bearings 41, and a support member 42 as shown in FIG. The receiving rollers 43, 43 push 44
are arranged at appropriate intervals and are rotatable through the holes.

Note that the receiving rollers 43, 43 rotate only when a force is forcibly applied to them, but are mounted so rigidly that they do not rotate at all times.

Therefore, since the two receiving rollers 43, 43 are attached to the lower end of the supporting member 42, the center of gravity of the supporting member 42 is located below the center of rotation, and the state shown in FIG. 3 is always maintained even when the rotating arm 40 is rotated. It has become.

Furthermore, a receiving box 45 for collecting the winding core opening is arranged slightly to the left, that is, at a forward position where the tip of the rotating arm 40 is at the lowest position. A stopper 46 is provided facing the rotation locus of the roll-shaped film, so as to contact the core opening and cause the core opening to fall from the receiving rollers 43, 43 which rotate together with the rotary arm 40.

Further, a blow nozzle 47 is installed slightly above the stopper 46 so as to be inclined toward the suction plate 11 for injecting compressed air to the end of the film being pulled out and sending it to the suction plate 11 side.

The rotation locus of the rotating arm 40 is the walking beam 24.
The fixed suction plate 1 is arranged to intersect at point P with the extension line of an appropriate number of juxtaposed protruding pieces 37, and the rotary arm 40 is closest to the fixed suction plate 19.
A blow nozzle 47 blows the film hanging down from the rolled film at a distance from 9 to the suction plate 11 and the fixed suction plate 19.
The distance is sufficient to allow the air to blow up to the gap between the two.

With this structure, when the cut film is suctioned onto the upper surface of the film stretching plate 16 via the suction member 17, the fixed suction plate 19 is quickly passed through a suction device (not shown) to remove the upper surface of the film. If compressed air is injected from the blow nozzle 47 after applying a suction action to
The pulled-out end of the film that hangs down from the roll-shaped film supported through 3 is blown up and enters between the suction plate 11 and the fixed suction plate 19, and the fixed suction plate 19
It is held by suction on the top surface of.

Next, the cylinder 15 is actuated to raise the film extension plate 16 until it comes into contact with the lower surface of the truck 21, and then applies a suction action to the periphery of the lower surface of the truck 21 and the suction plate 11. When the suction action is released, and then the cylinder 15 is reversely operated to lower the film extension plate 16, the cut film ′ is attracted to the lower part of the trolley 21 due to this action, and the end of the rolled film is pulled out. is attracted to the suction plate 11.

Next, the trolley 21 and the motor 12 are operated to
is moved to a position corresponding to the pattern plate 8, and the suction plate 11 is moved to a position corresponding to the left end suction member 17 of the film extension plate 16 and stopped.

At this time, the film attracted to the suction plate 11 is strongly pulled, so a force that tries to rotate the roll acts, which is transmitted to the winding core opening and rotates the receiving roller 43, so that the roll of film is wound. The core opening is rotated together and the film is drawn out.

In this case, the pulling end of the film is connected to the receiving roller 43.
is provided to the extent that it does not perform accelerated rotation, so the film is pulled out in a horizontal state. Next, the cylinder 15 is activated and the suction member 17 moves the film extension plate 16 to the suction plate 11.
After raising the suction member 17 and the fixed suction plate 19 until they come into contact with the suction member 17 and the fixed suction plate 19,
The suction action of 1 is stopped and the end of the film is suctioned to the suction member 17 and the fixed suction plate 19.

Next, the cutter cylinder 20 is operated to lower a portion of the cutter, cut the pulled-out film between the right end of the suction member 17 and the fixed suction plate 19, and return to the original position.

Next, the cylinder 15 is operated in reverse to lower the cut film 1' together with the film extension plate 16.

Meanwhile, at the position of the trolley 21, the air flowing down by the fan 4 is heated by the heater 2, becomes hot air, and is blown onto the cut film ′, making it easier to shape the cut film ′. If the pattern plate 8 is raised together with the turntable 7 by a cylinder (not shown) until it comes into contact with the cart 21, and a suction action is applied to the pattern plate 8, the cut film' will be stretched along the shape of the pattern plate 8. be done.

Next, the suction action of the carriage 21 is stopped and the cut film is transferred to the pattern plate 8 side, and then the turntable 7 is lowered to return the pattern plate 8 to its original position.

Next, the carriage 21 and the forward/reverse rotation motor 12 operate in reverse to return the carriage 21 and the suction plate 11 to their original positions, and then the cylinder 15 operates to move the film extension plate 16 to the carriage 21.
raise it until it touches the

Next, a suction action is applied to the cart 21 and the suction plate 11, and the suction action of the adsorption member 17 and the fixed suction plate 19 is stopped, and the cut film on the film extension plate 16 is transferred to the lower surface of the cart 21, and the suction is fixed. The pulled-out end of the film suctioned to the plate 19 is transferred to the suction plate 11.

During this time, the pattern plate 8 with the cut film 8 in close contact with its surface is moved to the mold forming position by rotating the turntable 70 times, and another pattern plate is moved below the hood 3, resulting in the state shown in Fig. 1. .

Thereafter, the operations of bringing the cut film 1' into close contact with the pattern plate 8, pulling out the film from the roll, transferring it onto the film spreading plate 16, and cutting the film are repeated in the same manner as described above.

When the film is pulled out a certain number of times in this manner, a detection device (not shown) is activated to stop the suction action of the fixed suction plate 19.

Next, the deceleration motor 3 of the walking beam conveyor 22
3 to activate the walking beam 24.

This operation continues until arm 32 is rotated 270 degrees from the lowest position.

During this time, the roll-shaped film supported in the recess 26 of the fixed frame 23 via the square shaft C is pushed up by the projecting piece 37 and moved forward to bring the roll-shaped film at the frontmost end to point P. position.

At this time, the projecting piece 37 is engaged with the square shaft part 8 of the winding core opening of the roll-shaped film, so that the roll-shaped film rotates on its own axis, causing the end of the film to hang down excessively. Do not cause any inconvenience.

Next, when the rotating shaft 39 is actuated to rotate the rotating arm 40 90 degrees counterclockwise and temporarily stopped, this operation causes the core opening of the roll-shaped film held at the tip of the rotating arm 40. is lowered and comes into contact with the stopper 46, and the winding core opening is dropped into the receiving box 45.

On the other hand, the tip of the rotary arm 40 on the side that does not hold the roll-shaped film moves upwards, and the circular shaft of the roll-shaped film is supported at point P by the projecting piece 37 via the square shaft 8. 2 is received by the receiving roller 48.

Next, the walking beam conveyor 22 is operated to move the projecting piece 3γ downward and backward, and transfer it to the recess 26 at a position advanced by one pitch on the roll-shaped film fixed frame 23.

Next, the rotating shaft 39 further rotates 90 degrees, and the rotating arm 40
is placed in the same position as in FIG.

Thereafter, the film is suctioned by the suction plate 11 in the same manner as the above-mentioned film drawing operation, and the film supply is completed.

In addition, if the number of sheets of film used after being pulled out and cut from a roll of film is detected by a detection device, it is possible to prevent equipment failure by pulling out an incomplete film at the final end of one roll of film. wake up,
This makes it possible to prevent inconveniences such as having to stop the apparatus again after pulling out a half-finished film and replacing it with a new roll of film.In addition, in the embodiments shown in FIGS. The circular shaft portion of the winding core opening is received by two receiving rollers 43 on the inside, and as shown in FIG. A conical receiving roller 43 is provided at the tip of the support member 42 so as to be rotatable forcibly, and both ends of the winding core opening of the roll film are provided with concave holes as shown in FIGS. 6 and 7. It is also possible to provide a recess E and engage the tip of the receiving roller 43 with this recess E.

As is clear from the description of the above embodiments, the present invention provides a walking beam conveyor at a rear position of a suction plate that can freely move back and forth to attract and pull out one end of the film, and a walking beam conveyor is provided between the suction plate and the walking beam conveyor. A pair of rotary arms facing each other on the left and right sides are provided which are capable of intermittent rotation to receive the core of the roll-shaped film supported at the front end of the beam conveyor between the front parts and send it to a position immediately after the suction plate. The film is characterized by a blow nozzle that blows up the drawn end of the roll-shaped quil film supported by the suction plate toward the suction plate, which eliminates the need for workers to change the film and also reduces the work required to create the vacuum mold. It has various effects such as making it easier to automate the process, and is extremely valuable to the industry.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a partially cutaway front view, FIG. 2 is a perspective view of a rolled film wound around a core, and FIG. 3 is a partially cutaway view of a rotating arm. 4 is a front view, FIG. 4 is a partially cutaway side view showing a state in which a roll-shaped film is supported by the support member of the rotary arm, and FIG. 5 is a side view showing another embodiment of the support member provided at the tip of the rotary arm 6 is a perspective view showing another embodiment of the roll-shaped film wound around the core, and FIG. 7 is a part of the end of the core shown in FIG. 6. It is a notch side view. 11: Adsorption plate, 22: Walking beam conveyor, 4
0: Rotating arm, 42: Support member, 43: Receiving roller, 4
6: Cash, 47: Blow nozzle.

Claims (1)

[Claims] 1. A walking beam conveyor 22 is located behind the suction plate 11, which can freely move back and forth to attract and pull out one end of the film.
The suction plate 11 and the walking beam conveyor 2 are provided.
A pair of rotary arms 40 are provided between the walking beam conveyor 22 and are rotatable intermittently to receive the core of the roll-shaped film supported at the front end of the walking beam conveyor 22 and send it to a position immediately after the suction plate 11. A film supply device for a vacuum mold making apparatus, characterized in that blow nozzles 47 are provided to face each other on the left and right and blow up the drawn-out end of the roll-shaped film supported by the rotary arm 40 toward the suction plate 11. 2. Source pressure mold making according to claim 1, in which a supporting member 42 with receiving rollers 43, 43 for receiving a winding core of a roll-shaped film is pivotally supported at both ends of a rotating arm 400 so as to be forcibly rotated. Film feeding device in the device. 3 A dowel 4 that faces the rotation locus of the roll-shaped film received between the front parts of the pair of rotating arms 40 and releases the core after the film has been drawn out when the rotating arms 40 rotate 400 times.
6. A film feeding device in a vacuum mold making apparatus according to claim 1, wherein the film feeding device is provided with a film feeding device.