JPH091643A - Mold clamping device for blow molding machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a hollow molding machine that can accurately and easily adjust the distance between the die and the parison outlet of the accumulator head, and that can also easily perform die replacement. To do. [Structure] The frame 1 of the mold clamping device 55 can be lifted and lowered by an elevating device 7 provided on an adjustment frame 6, and the mold clamping device 55 is provided on a wheel 22 provided below the adjustment frame 6.
Made movable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blow molding machine and, more particularly, to a mold clamping device for the blow molding machine.

[0002]

2. Description of the Related Art A conventional hollow molding machine will be described with reference to FIG. That is, in the figure, what is denoted by reference numeral 71 is an extruder, and an accumulator head 73, which is a die head, is coupled to a tip end portion of the extruder 71 via an adapter 72.

The extruder 71 and the accumulator head 7
3 and the like are mounted on a mount 74, and below the accumulator head 73, a mold clamping device 75 for opening and closing a mold is fixedly provided on the floor. The parison hanging from the accumulator head 73 is held in the mold attached to the mold clamping device 75, and air is blown into the parison to form a hollow molded product.

The gantry 74 is provided on an adjusting gantry 76 and can be moved up and down by an elevating jack 79 which is driven by a drive motor 77 for elevating and lowering through a chain 78. With such a structure, the mold and the accumulator head 7 can be formed according to the size of the parison and the mold shape.
The distance between the 3 parison exits can be adjusted.

Further, the mount 74 is the adjustment mount 76.
Wheels 81 that are provided on the lower part of the rail and roll on the rail 80 can be brought into and out of contact with the mold clamping device 75.
With such a configuration, the accumulator head 73 mounted on the frame 74 can be separated from the upper portion of the mold clamping device 75, and the mold can be easily replaced by a crane or the like.

A molded product take-out device 8 is provided below the tip of a mount 74 on which the accumulator head 73 is mounted.
2 is attached so as to project forward, and the molded product can be carried out to the left side in the drawing. Further, inside the gantry 74, a drive motor 83 of the extruder, a fan 84 for cooling the extruder cylinder, etc. are attached.

[0007]

A conventional blow molding machine is:
Because of the above configuration, the following problems exist. (1) Since the distance between the die and the parison outlet of the accumulator head is adjusted by raising and lowering the pedestal on which the extruder, accumulator head, etc. are mounted, the lifting device becomes large and accurate adjustment is difficult. Met. (2) When moving the cradle to separate the accumulator head from the upper part of the mold clamping device for mold replacement, the molded product take-out device is provided so as to project from the tip of the cradle, so the movement allowance of the cradle is increased. I had to do it.

The present invention has been made to solve the above problems. The distance between the die and the parison outlet of the accumulator head can be adjusted accurately and easily, and further, the die can be adjusted. An object of the present invention is to provide a blow molding machine that can be easily replaced.

[0009]

A mold clamping device for a hollow molding machine according to the present invention includes a mold attached to the mold clamping device,
It is characterized in that it can be brought into and out of contact with the exit of the die head and can be moved forward from the lower part of the die head.

More specifically, the frame of the mold clamping device can be lifted and lowered by an elevating device provided on the adjusting frame, and the mold clamping device can be moved by wheels provided on the lower part of the adjusting frame. Is characterized by.

More specifically, the frame of the mold clamping device is
It is possible to move up and down by the lifting jacks provided at the four corners on the adjustment stand, and it is preferable to set the lifting position with limit switches.

More specifically, it is preferable that a molded product take-out device projecting forward is attached to the upper part of the mold clamping device.

[0013]

[Function] When adjusting the distance between the die and the parison outlet of the die head according to the size of the parison and the shape of the die, the frame of the mold clamping device is adjusted by the lifting jack of the lifting device installed on the adjustment stand. Move up and down. Further, when the mold is replaced by a crane or the like, the mold clamping device is moved forward from the lower part of the die head by the wheels provided at the lower part of the adjusting frame.

[0014]

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing the blow molding machine, and FIG.
FIG. 2 is a side view of FIG. 1.

In FIGS. 1 and 2, the reference numeral 51 is an extruder, and an accumulator head 53, which is a die head, is connected to the tip of the extruder 51 via an adapter 52. The extruder 51, the accumulator head 53, and the like are mounted on a pedestal 54, and a mold clamping device 55 that opens and closes the mold is disposed below the accumulator head 53. The parison hanging from the accumulator head 53 is held in a mold attached to the mold clamping device 55, and air is blown into the parison to form a hollow molded product.

The pedestal 54 comprises an upper pedestal 56 and a lower pedestal 57 which constitutes a leg portion, and these can be coupled / separated by coupling means such as bolts. As described above, the extruder 51, the accumulator head 53, and the like are mounted on the upper mount 56, and the ladder 58, the hand scraper 59, and the like are attached. The lower pedestal 57 is fixed to the floor, and a control panel 60 of the hollow molding machine, a hydraulic unit 61, and the like are arranged inside.

The frame 1 of the mold clamping device 55 includes a lower frame 2, a side frame 4 facing each other in the longitudinal direction of the lower frame 2, and two side frames 4 standing on each side. It is composed of two tie bars 5 that are inserted into both ends of the partial frame 4 and connect the both side frames 4 together.

As shown in FIGS. 3 and 4, the frame 1 can be moved up and down by an elevating device 7 provided on an adjusting frame 6. The lifting device 7 includes a driving motor 8 for lifting, a lifting jack 10 driven by the driving motor 8 via a chain 9, and an adjustment stand 6.
It is composed of two limit switches 12 which are mounted on the upper part of the frame 1 via a bracket 11 and adjust the ascending / descending position of the frame 1.

As shown in FIG. 5, the lifting jack 10 is mounted on the cylinder 1 which is mounted via flanges 13 close to the legs 3 provided at the four corners of the lower frame 2.
4 and an ascending / descending shaft 16 inserted into the cylinder 14 and rotatably attached to the adjusting mount 6 via a flange 15. A bush 17 is provided between
An elevating female screw 18 is provided on the inner peripheral portion of the upper portion of the cylinder 14, and an elevating male screw 19 that is screwed to the female screw 18 is provided on the upper portion of the elevating shaft 16. The sprocket 20 provided on the lower portion of the lifting shaft 16 is connected to the drive motor 8
The frame 1 is moved up and down by rotating through the chain 9.

The mold clamping device 55 can be moved forward from the lower part of the accumulator head 53 by the wheels 22 provided on the lower part of the adjusting frame 6 and rolling on the rails 21.

As shown in FIGS. 1 and 2, the side frame 4 has a substantially rectangular shape and is formed so as to taper toward both ends, and the upper portion is erected so as to be inclined forward. A mold clamping cylinder 24, which moves the mold mounting plate 23 back and forth, is provided at the center of the both side frames 4 so as to face each other. Upper and lower brackets 25 and 26 are provided on the upper front side and the lower rear side of the side of the mold mounting plate 23, and are slidable on slide rails 27 provided in the longitudinal direction on the upper side of the upper and lower tie bars 5. Is engaged with.

A molded product take-out device 28 is provided so as to project to the front at the central part of the upper tie bar 5 in FIG. 1 so that the molded product can be carried out to the left side in the drawing. The molded product take-out device 28 engages with the traveling rail frames 29 protruding from the tie bar 5, the traveling rails 30 provided on both sides of the traveling rail frame 29, and the traveling rails 30. , Chuck opening / closing device 3 that moves back and forth
1, a chuck 32 attached to the rear portion of the chuck opening / closing device 31, a drive motor 34 for moving the chuck opening / closing device 31 back and forth through a traveling chain 33, and an upper portion of the side frame 4 for attaching the traveling rail. It is composed of an extraction device supporting beam 35 that supports the tip of the frame 29.

Next, the operation of the above embodiment will be described.

When the distance between the die and the parison outlet of the accumulator head 53 is adjusted according to the size of the parison and the shape of the die, the frame 1 is moved up and down by the lifting jack 10 provided on the adjustment stand 6. , The elevation position is set by the two limit switches 12 provided at the top and bottom. When exchanging the mold by a crane or the like, the mold clamping device 55 is moved forward from the lower part of the accumulator head 53.

[0025]

The present invention is configured as described above and has the following effects. (1) Since the distance between the die and the parison outlet of the accumulator head is adjusted by raising and lowering the lightweight mold clamping device, it is possible to perform the adjustment with high accuracy and to make the lifting device small and inexpensive. . (2) When exchanging the mold, since the mold clamping device is moved forward from the lower part of the accumulator head, it can be easily moved manually. Further, since the molded product take-out device is attached to the mold clamping device, the moving amount of the mold clamping device is small, and the installation space can be reduced. (3) Since the frame on which the extruder, accumulator head, etc. are mounted is fixed to the floor, the control panel of the hollow molding machine, hydraulic unit, etc. can be installed inside the frame, and the installation space for the hollow molding machine can be set. Can be made smaller.

[Brief description of the drawings]

FIG. 1 is a front view showing a blow molding machine according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing a lifting device.

FIG. 4 is a front view of FIG. 3;

FIG. 5 is a cross-sectional view showing a lifting jack.

FIG. 6 is a configuration diagram showing a conventional blow molding machine.

[Explanation of symbols]

 1 frame 2 lower frame 3 legs 4 side frame 5 tie bar 6 adjustment stand 7 lifting device 8 drive motor 9 chain 10 lifting jack 11 bracket 12 limit switch 13, 15 flange 14 cylinder 16 lifting shaft 17 bushing 18 lifting female screw 19 lifting Male screw 20 Sprocket 21 Rail 22 Wheel

Claims (4)

[Claims] 1. A mold attached to a mold clamping device (55) can be brought into and out of contact with an outlet of a die head (53) and can be moved forward from a lower portion of the die head (53). A mold clamping device for a hollow molding machine. 2. The frame (1) of the mold clamping device (55) can be moved up and down by an elevating device (7) provided on the adjustment frame (6), and the mold clamping device (55) is adjusted on the adjustment frame (6). The mold clamping device for a hollow molding machine according to claim 1, wherein the mold clamping device is movable by a wheel (22) provided at a lower part of the mold. 3. The frame (1) of the mold clamping device (55) comprises:
The lifting / lowering jacks (10) provided at the four corners of the adjustment frame (6) can be lifted and lowered, and the lifting position is set by a limit switch (12).
A mold clamping device for the hollow molding machine described. 4. The mold clamping device for a hollow molding machine according to claim 2, wherein a molded product take-out device (28) is attached to an upper portion of the mold clamping device (55) so as to project forward. .