JPH0140638Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention enables the barrel of an extruder to be disassembled into upper and lower halves, and also enables the disassembled barrel to be moved in the radial direction for cleaning and repair. This invention relates to a twin-screw extruder for food processing and pharmaceutical processing, which facilitates the processing of food and pharmaceutical products.

[Prior Art] In recent years, twin-screw extruders that can powerfully knead raw sulfur and extrude it into a predetermined shape have come into widespread use in the fields of food processing and pharmaceutical processing. However, in commonly used twin-screw extruders, the screws are supported in a cantilevered manner, so that depending on the kneading conditions, the screws could touch the top, bottom, right and left.

For this reason, contact occurs between the two screws and between the screw and the barrel, and there is a risk that metal powder from the screw or barrel that has worn out due to contact may be mixed into the kneaded material. Because it becomes a harmful additive if mixed into
It has been inappropriate to use a twin-screw extruder with a cantilevered screw for food processing or pharmaceutical processing.

[Problems to be solved] Therefore, it has been proposed to use a dual-support type twin-screw extruder for food or pharmaceutical processing, in which a twin-screw screw is supported at both ends to prevent the screw from swinging vertically and horizontally. has been established and implemented.

However, when disassembling and cleaning a twin-screw extruder,
Since the barrel must be pulled out to the tip of the screw and disassembled, it takes a lot of effort and time to disassemble and clean the double-support type, which also has a support device on the tip of the screw. It was hot. This problem has been a major factor hindering productivity improvement in fields such as food processing and pharmaceutical processing, which require frequent disassembly and cleaning to eliminate sanitary control.

In addition, in order to improve the kneading effect and obtain high-quality products, when a special member is installed in the screw, etc., and the processing is performed by rotating it at high speed, a part of the kneaded material may adhere to the inner wall of the barrel in the form of a film. However, it could not be completely removed by the disassembly and cleaning method described above. For this reason, during the next processing, the film-like isomer material peels off and mixes into the product, causing defective products, or the film-like isomer material gradually grows, interfering with the continuous operation of the extruder. I had a problem.
This problem has become a very serious problem in the fields of food processing or pharmaceutical processing, where quality control is an important issue.

This invention was created in view of the above problems, and is a food processing and pharmaceutical processing technology that improves productivity and quality by making field cleaning easier and more reliable. The purpose is to provide a twin screw extruder for use.

[Means for Solving Problems] In order to achieve the above object, the twin screw extruder for food processing and pharmaceutical processing of the present invention includes a two screw screw rotatably supported on both sides of the tip and base ends;
The barrel is formed by being divided into an upper barrel and a lower barrel, one side can be opened and closed, and the other side is rotatably connected, and the open upper barrel and lower barrel are supported and moved in the radial direction of the extruder. If necessary, the split upper barrel and lower barrel are provided with a drive device for opening and closing the barrels.

[Example] Fig. 1 is an overall side view of an embodiment of the twin-screw extruder for food processing and pharmaceutical processing of the present invention, Fig. 2 is a perspective view of the barrel, and Fig. 3 is a cross-section of the main parts of the extruder when disassembled. FIG. 4 shows a perspective view of a main part of a barrel equipped with a drive device. In these drawings, 10 is an extruder main body, 30 is a barrel support device, and 40 is a barrel driving device.

The extruder main body 10 includes a barrel 11, a biaxial screw 25 in the hollow part of the barrel 11, a drive section 12 that supports the base end of the biaxial screw 25, and provides rotational force to these screws, and a biaxial screw 25. A tip bearing part 13 that rotatably supports the tip of the screw 25 and is movable to some extent in the longitudinal direction, a hopper 14 for supplying raw material formed at the upper part of the base end, and a tip attached to the tip of the barrel 11. Together with the bearing part 13,
It is composed of a die 15 that moves in the longitudinal direction.

The barrel 11 is divided into two from the center into an upper barrel 11a and a lower barrel 11b. The upper and lower barrels 11a, 11b
An upper joint piece 16a and a lower joint piece 16b corresponding to each other are protruded in the longitudinal direction on one side. Bolt grooves 17a and 17b are provided in corresponding positions on the upper joint piece 16a and the lower joint piece 16b. Of these, the bolt groove 17 of the lower joint piece 16b
A bolt 18 is rotatably attached to b by a hinge pin 19, and after this bolt 18 is engaged with both bolt grooves 17a and 17b, the upper joint piece 1
One side of the upper and lower barrels 11a, 11b is fixed by tightening with a nut from the 6a side.

On the other hand, the upper and lower barrels 11a, 11b
The other side is formed into a hinge 20 and the barrel 11
are connected so that they can be opened and closed on one side.
Note that it is also possible to tighten the bolts on the hinge 20 side to more firmly fix the upper barrel 11a and the lower barrel 11b.

Reference numeral 21 designates positioning pins for the upper and lower barrels 11a and 11b when closing the barrel 11, and is provided so as to fill the lower half of the lower joint piece 16b in the longitudinal direction. 22a and 22b are upper and lower clamping plates, and the upper clamping plate 2
2a are integrally formed at both ends of the upper barrel 11a, and lower clamping plates 22b are integrally formed at both ends of the lower barrel 11b. These upper and lower clamping plates 22a and 22b function together as a clamping plate, and the barrel 11 is fixed to the clamping plate 12a of the drive section 12 and the clamping plate 15a of the die 15 with bolts. It has been done.

In addition, the barrel 11, the drive unit 12, and the die 15
It is also possible to tighten using a so-called shell clamp or the like.

Further, the vicinity of the screw hole 23 at both ends of the barrel 11 (tightening plate 22) is a concave surface 24,
It is fitted with the convex end surface of the drive section 12 and the convex end surface of the die 15, respectively, and also performs positioning of the drive section 12 and the die 15.

It is of course possible to provide a heater or the like in the above-mentioned two-piece barrel 11 as well. Further, although not shown, a sealing member may of course be provided if necessary.

As described above, the biaxial screw 25 inserted through the screw hole 23 of the barrel 11 has its base end and distal end rotatably supported by the drive section 12 and the distal end bearing section 13, respectively. There are several reverse threads (not shown) near the section to prevent backflow.
Further, it is also possible to introduce heating or cooling liquid or gas into the screw 25 from, for example, the end bearing portion 13 side.

The barrel support device 30 is located below the barrel 11 and includes rails 36 provided in the radial direction of the barrel 11.
A cart 31 that is movable thereon; a plurality of supports 32a and 32b that are provided on the cart 31 and support each part of the open upper barrel 11a and lower barrel 11b;
Hinge shaft support 3 that always bears the hinge shaft 20a
2c, and a fixing member 33 that is provided on one side of the truck 31 and presses the lower barrel 11b. This fixing member 33 has a spring 34 at its upper end.
A fixing piece 35 is provided which is rotatably and pressably crimped. 37 is a stopper of the support device 30 provided at the end of the rail 36. Note that it is even more convenient if each of the supports 32a and 32b, the hinge shaft support 32c, and the fixing member 33 are made movable up and down.

In FIG. 4, 40 is a drive device for opening and closing the barrel 11 easily and safely.
This drive device 40 is rotatably supported on hinge shafts 20a of an upper barrel 11a and a lower barrel 11b, and includes chain gears 41a and 41b bolted to each hinge portion, and a chain connected to these chain gears 41a and 41b. It consists of motors 42a and 42b that transmit rotational force via 43a and 43b. The rotation directions of the motors 42a and 42b are opposite, and the upper barrel 11a is rotated upward.
The lower barrel 11b rotates downward. These motors 42a and 42b are mounted on a truck 31 of the support device 30.

As the means for transmitting the rotational force of the motors 42a and 42b, in addition to the above-mentioned chain, other transmitting means such as a gear group can also be used. Further, the rotational force of the upper barrel 11a and the lower barrel 11b can be taken from the drive unit 12 of the extruder. In addition,
Opening and closing of the upper barrel 11a and lower barrel 11b is as follows:
Of course, it is also possible to use a manual cylinder or the like.

Therefore, when disassembling and cleaning the twin-screw extruder for food processing and pharmaceutical processing of this embodiment, the upper and lower clamping plates 22a and 22b at both ends of the barrel 11 are connected to the drive unit 12 and the die 15, respectively. It is removed from the tightening plates 12a, 15a, the tip bearing portion 13 and the die 15 are moved somewhat in the longitudinal direction, and the barrel 11 is also moved somewhat to release the fitting between both ends of the barrel. Bolts 18 then secure the upper and lower barrels 11a, 11b on one side.
is loosened and removed, and the upper and lower barrels 11a and 11b are rotated about the hinge 20 on the other side by the motors 42a and 42b of the drive device 40 to open them.

Then open upper barrel and lower barrel 1
1a and 11b are attached to predetermined supports 32a and 3, respectively.
2b and the hinge shaft support 32c, and the fixing piece 35 of the fixing member 33 is rotated to press the lower barrel 11b. If the cart 31 is moved in the radial direction of the extruder (in the direction of the arrow in FIG. 3), the barrel 11 can be separated from the screw 25 with the screw 25 still attached, and both the barrel 11 and the screw 25 can be cleaned. can be done.

The ability to easily open and close the barrel 11 in this manner is very convenient when disassembling the extruder for cleaning or repair. In order to avoid contamination of metal powder due to contact wear between screws and between screws and barrels during operation, the screws are supported on both sides, and in addition, for medical and food processing that requires frequent disassembly and cleaning for quality control reasons. It is particularly useful for twin screw extruders and pharmaceutical processing.

Further, by facilitating repair and maintenance, it becomes extremely easy to form the barrel 11 and screw 25 from ceramic or the like or by vapor deposition of ceramic. This is very significant in twin-screw extruders for food processing and pharmaceutical processing from the viewpoint of fundamentally preventing metals from being mixed into foods or medicines.

Furthermore, by opening and closing the barrel 11 using the drive device 40, operations such as cleaning and repair can be performed safely and more easily.

[Effects of the invention] As described above, according to the invention, the barrel of the extruder is divided into upper and lower halves, and can be opened and closed on one side, making it easier to disassemble and clean a double-screw extruder supported on both sides. It is extremely easy to do. Therefore, we have made it possible to use double-supported twin-screw extruders, which have not been used much in food processing and pharmaceutical applications due to the difficulty of disassembling and cleaning.
It has the effect of improving productivity and quality by strongly processing food and pharmaceutical products while preventing the contamination of metal powder.

[Brief explanation of the drawing]

Fig. 1 is an overall side view of one embodiment of the present invention;
The figure shows a perspective view of the barrel, FIG. 3 is a sectional view of the main part of the extruder when disassembled, and FIG. 4 is a perspective view of the barrel equipped with a drive device. 10... Extruder main body, 11... Barrel, 16...
... joint piece, 20 ... hinge, 25 ... screw,
30...support device, 40...drive device.

Claims (1)

[Claims for Utility Model Registration] (1) A biaxial screw rotatably supported on both sides of the distal and proximal ends, divided into an upper barrel and a lower barrel, with one side capable of opening and closing. For food processing and pharmaceutical processing, the extruder is equipped with a barrel whose other side is rotatably connected, and a support device that supports the open upper barrel and lower barrel and is movable in the radial direction of the extruder. Twin screw extruder. (2) The twin-screw extruder for food processing and pharmaceutical processing according to claim 1, wherein the divided upper barrel and lower barrel have a drive device for opening and closing the barrels. .