JPH033567B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an unmanned and labor-saving material supply/exchange device that can selectively supply various types of powder or granular materials to a plasticizing device.

Conventionally, as a means of exchanging the material supplied to a plasticizing apparatus for plastics, for example, a plurality of large hoppers are attached to a material supplying machine, and the hoppers are rotated or slid to be switched and connected to a supply port. , where the supplied material is exchanged, or when a small hopper is attached to the supply port of the material feeder and the hopper is connected to the material tank via a hose to exchange the supplied material,
A device that allows you to connect and change hoses to various types of tanks. etc. are known.

However, in the former case, the hoppers had to be replaced in batches, which required manpower and time to replace the hoppers, as well as requiring a large hopper installation space.

In addition, in the latter case, the hopper itself can be made smaller than in the former case, but when replacing materials, new material must be supplied after the remaining material in the supply hose and hopper has been completely discharged. In addition to taking time to discharge, problems such as wasted material were inevitable.

This invention was made in view of the above, and
A small hopper for storing the minimum amount of material required is attached to the supply port of the material feeder, and a slide body that slides in a direction perpendicular to the axis of the hopper is disposed above the hopper. In this method, a plurality of through holes are drilled, and a material separation device that communicates with the material tank is installed in each of these through holes so as to communicate with each other, and the through holes are selectively connected to the hopper by sliding the slide body. This makes it possible to exchange the material supplied to the material feeder simply by adjusting the position of the slide body. Hereinafter, a description will be given of an embodiment implemented in the plasticizing apparatus shown in the drawings.

FIGS. 1 to 3 show an embodiment in which the present invention is implemented using a pressure-feeding type material supply system.

Reference numeral 1 denotes a plasticizing device for plastics, which is composed of a plasticizing screw 2 , a heating cylinder 3, and a water-cooling cylinder 4, as well as a hopper 5, which will be described later.
A supply port 6 communicating with is bored.

Reference numeral 5 denotes a hopper at least partially made of a transparent material such as glass, which includes a lower flange 7 attached to the water-cooled cylinder 4 and an upper flange 9 disposed on the upper part of the flange 7 via bolts 8, 8. It is attached to the plasticizing device 1 by this.

Reference numeral 10 denotes a movable bush, which is partially slidably fitted into the upper flange 9, and which is fitted with springs 11, 11.
It is urged to press against a slide body which will be described later.

Reference numeral 12 denotes an outer cylinder mounted on the water-cooled cylinder 4 so as to enclose the hopper 5, flanges 7, 9, etc., and a slide base 13 is mounted on the side of the outer cylinder 12 opposite to the water-cooled cylinder 4.

Reference numeral 14 denotes a slide body which is disposed so as to be able to slide relative to the slide base 13 while in sliding contact with the movable bush 10, and is provided with a plurality of through holes 15, 15 substantially perpendicular to the sliding direction.

Reference numeral 16 denotes a guide and holding plate for the slide body 14 mounted on the slide base 13, and 17 is a hydraulic or pneumatic cylinder for sliding the slide body 14 mounted on the slide base 13.

18 are through holes 15, 15 of the slide body 14;
A cyclone is attached to the upper part of the cyclone that separates the material fed under pressure in a mixed state with air.A material supply hose 19 connected to a material tank (not shown) is connected to the side of the cyclone 18, and the upper part A filter 20 is attached to the.

21, 21 are proximity switches disposed at intervals on the sides of the hopper 5, and are used to switch the material 2 in the hopper.
Detect the storage amount of 2.

Figures 4 to 6 show other embodiments in which the present invention is implemented using a suction type material supply system, and the same reference numerals as those shown in Figures 1 to 3 are the same. , so we will omit the explanation and only explain the differences.

Reference numeral 25 denotes a separation hopper attached to the upper part of the through holes 15, 15 of the slide body 14 for separating the suctioned material in a mixed state with air. A swing valve 26 is installed to open and close the valve, and a filter 2 is installed at the top.
7 is installed.

Reference numeral 28 is a material suction hose attached to the side of the hopper 25 and is connected to a material tank (not shown).

29 is the upper lid of the hopper 25.

Reference numeral 30 denotes a hook-shaped frame having one end attached to the guide/holding plate 16 and the other end disposed so as to cover at least a part of the separation hopper 25;
A through hole 31 is bored at a suitable position in the upper part of the hopper 25, and the other end of a movable bush 32 whose one end surface is in sliding contact with the upper cover 29 is fitted into the through hole 31.

33 is a spring for urging the movable bush 32 to press against the upper lid 29; 34 is the through hole 3;
A suction hose attached to the side opposite to the movable bush 32 of No. 1 is connected to a vacuum pump or the like (not shown).

In the embodiment shown in FIGS. 4 to 6, since a certain amount of material stored in the separation hopper 25 is charged into the hopper 5, the proximity switch 21 is sufficient for detecting the lower limit.

This invention has the configuration as described above.

Next, its effect will be explained.

First, the slide body 14 is adjusted so that the hopper 5 matches any desired one of the through holes 15 provided in the slide body 14, and the pressure feeding device or suction device (not shown) is activated. Material is supplied to the hopper 25.

The material supplied to the cyclone 18 is automatically separated from the air and falls into the hopper 5 one after another, and the air is discharged from the filter 20 into the atmosphere. This material is fed until the upper limit proximity switch of the hopper 5 is actuated.

Further, the material sucked into the separation hopper 25 is separated from air within the hopper by a filter 27, and is stored in the hopper 25 until the material reaches a predetermined amount set by a limit switch, proximity switch, timer, etc. (not shown). . When the suction is stopped after a predetermined amount has been stored, the material is supplied into the hopper 5 by pushing the swing valve 26 open.

After a predetermined amount of material is supplied to the hopper 5 in this manner, the plasticizing device 1 is operated to perform melting and kneading operations.

Through this operation, the material in the hopper 5 is gradually discharged, and when the material decreases to the lower limit position of the proximity switch 21, the pressure feeding or suction device is operated in conjunction with the switch 21, and the material is discharged into the hopper 5 as before. and repeat this.

On the other hand, when converting to a different type of material, after the preceding material in the hopper 5 is exhausted (the hopper 5 is small, the material disappears in a short time), the slide body 14
and adjust it to match the other through hole 15 connected to the desired material tank formed in the slide body 14, and operate the pressure feeding device or suction device in the same manner as described above to feed the material into the hopper 5. Supply materials.

The plasticizing device for plastics shown in this embodiment does not have any special features, and can be replaced with various plasticizing devices or feeders other than the plasticizing device shown in this embodiment.
It goes without saying that changes may be made without departing from the spirit of the present invention, such as replacing 1 with a limit switch, a timer, or the like.

As described above, according to the present invention, the hopper 5 and the plurality of material tanks are connected via the slide body that can be switched and connected and the small material separation device, so that the material can be removed by simply adjusting the slide body 14. can be replaced, and requires less installation space.
Further, since the capacity of the hopper 5 is relatively small for several shots and supplies a fixed amount at a time, wasted material can be kept to a minimum when replacing materials.

Furthermore, the exchange of materials can be performed by remote control or fully automatic operation, which has the advantage of being unmanned and saving labor.

[Brief explanation of the drawing]

1 to 3 show one embodiment of the present invention, in which FIG. 1 is a front sectional view, FIG. 2 is a side sectional view, FIG. 3 is a plan view, and FIGS. 4 to 6 are Another embodiment of the present invention is shown in which FIG. 4 is a front sectional view, FIG. 5 is a side sectional view, and FIG. 6 is a plan view. 1 : Plasticizing device, 5: Hopper, 6: Supply port, 1
4: Slide body, 15: Through hole, 18: Cyclone, 25: Separation hopper.

Claims (1)

[Claims] 1. A hopper 5 with a relatively small capacity for several shots is provided at the material supply port 6 of the machine to which powder or granular material is supplied in the plasticizing apparatus 1 for plastics, and a hopper 5 with a relatively small capacity for several shots is provided at the upper part of the hopper 5, and a A slide body 14 that slides in the direction is provided, a plurality of through holes 15...15 are bored in the slide body 14, and these through holes 1
5...15, the material separation devices 18 and 25, which are connected to the material tanks, are installed so as to communicate with each other, and the through holes 15...1 are connected to each other by sliding of the slide body 14.
5 selectively communicates with the hopper 5.