JPH0410917A - Bank bottom plate moving device of roller head extruder - Google Patents

Abstract

PURPOSE:To prevent leaks of polymeric material and make cleaning work easier by providing a bank bottom plate so as to be vertically moved between a back receiving position and a lower position and an operating means for vertically moving said plate. CONSTITUTION:A pair of upper and lower calender rolls 13, 14 are provided in the vicinity before an extruder 11 and a bank bottom plate 16 for supporting a bank 17 is provided at the lower position between the extruder 11 and the rolls 13, 14, in which the plate 16 is provided so as to be vertically moved between a bank receiving position A and a lower position B and an operating means 39 is provided to vertically move the plate 16. For effecting the molding operation, the bank 17 is supported by the plate 16 to prevent leaks of polymeric material such as rubber etc. For performing the cleaning work, the plate 16 is lowered by means of the means 39 to open the lower part between the extruder 11 and the rolls 13, 14. Consequently, the front side of the extruder 11 can be easily cleaned without forwardly moving the rolls 13, 14.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bank bottom plate moving device for a roller head extruder.

(Prior Art) A roller head extruder used for extrusion molding a polymeric material, such as rubber, into a sheet, as shown in FIG.
The rubber 1 supplied from the chute 2 is extruded forward by the screw 4 of the extruder main body 3 and rolled by a pair of upper and lower calender rolls 5 and 6 disposed near the front of the extruder main body 3 to form a rubber sheet 7. It is designed to be molded.

During molding, the extruder main body 3 and the calender roll 5
, 6 is formed between the rubber 1 and the bank 8. In order to keep the bank amount at an appropriate level, the number of revolutions of the screw 4 and the calender roll 5.6 or the screw 4 and the calender roll 5 are .6 controls the height of bank 8.

If this bank 8 remains open at the bottom, it will try to fall down due to its own weight, so the extruder main body 3
A bank bottom plate 9 is fixed with bolts 10 to prevent the rubber 1 from leaking downward.

(Problems to be Solved by the Invention) Conventionally, the bank bottom plate 9 was fixed to the extruder main body 3, so cleaning it was extremely difficult.

That is, when producing the rubber sheet 7 by changing the type of rubber 1, if the rubber 1 used in the previous production remains due to adhesion, it will cause a quality problem and cleaning must be carried out. be.

However, since the conventional bank bottom plate 9 is fixed, unless the calender rolls 5 and 6 are moved forward,
cannot be cleaned. Therefore, there is a drawback that cleaning becomes extremely difficult.

In view of this, an object of the present invention is to facilitate cleaning.

(Means for Solving the Problems) The present invention provides a pair of upper and lower calender rolls 13.14 disposed near the front of an extruder main body 11, and a lower portion between the extruder main body 11 and the calender rolls 13.14; In a roller head extruder equipped with a bank bottom plate 16 that receives a bank 17 from below, the bank bottom plate 16 is provided so as to be movable up and down between a position A and a lowered position B below the bank support. It is provided with an operating means 39 for moving up and down.

(Function) During molding, the bank 17 is received by the bank bottom plate 16 to prevent leakage of polymeric materials such as rubber.

When cleaning, the bank bottom plate 16 is moved downward by the operating means 39 to open the lower part between the extruder main body 11 and the calender rolls 13,14. Therefore, the front side of the extruder main body 11 can be easily cleaned without moving the calender rolls 13, 14 forward.

(Example) Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIGS. 1 to 4, reference numeral 11 denotes an extruder main body, which is equipped with a screw (not shown) in a chamber 12 and configured to extrude a polymeric material, such as rubber, forward. Reference numerals 13 and 14 denote a pair of upper and lower calender rolls, which are arranged in front of the extruder main body II.
3.14, the rubber is rolled to form the rubber sheet 15. 16 is the bank bottom plate,
The extruder body 1 is arranged so that the rubber bank 17 is received from below between the extruder body 11 and the calender rolls 13 and 14.
It is arranged horizontally in the left-right direction on the lower side between the first calender rolls 13 and 14. The bank bottom plate 16 has a pair of left and right swinging arms 18 extending rearward under the extruder main body 11, and the rear end of this swinging arm 18 is connected to the regular bank where the bank bottom plate 16 receives the bank 17. The bracket 19 of the extruder body 11 is pivoted vertically by a shaft 20 so that the bank bottom plate 16 moves up and down between the support position IA and the lowered position B, which is lower than the extruder body 11. It is worn. Reference numeral 21 denotes a pair of lock arms, which are disposed below the pair of right and left swing arms 18 of the bank bottom plate 16, corresponding to the pair of right and left swing arms 18 of the bank bottom plate 16. Each lock arm 21 is fixed at its lower end to a shaft 22, and the shaft 22 is rotatably supported by a pair of left-hand cloth brackets 23 projecting downward from the extruder main body 11. As shown in FIGS. 5 and 6, a roller 24 is attached to the tip of each lock arm 21 for pushing up each swing arm 18 from below when standing up, and a roller 24 is attached to the tip of each lock arm 21 to push up each swing arm 18 from below when the lock arm 21 is erected. A roller 25 that receives the arm 18 from below is attached in the middle. Further, each lock arm 21 is connected to each swing arm 18 via a bending link mechanism 26. There are a pair of left and right bending link mechanisms 26, each of which includes an upper link 27 and a lower link 28. Upper link 27 and lower link 28 are link bin 2
9, and the upper link 27 is connected to the swing arm 18 by a link pin 30, and the lower link 28 is connected to the swing arm 18 by a link pin 30.
are pivotally connected to the lock arm 21 by link pins 31, respectively. Reference numeral 32 denotes an operating lever for operating the lock arm 21, which is fixed to one end of the shaft 22.

Note that the shaft 22 is attached to the floor bracket 3 near the operating lever 32.
It is rotatably supported by 4. 35 is a hook for an operating lever, which is attached to the frame 3 near the side of the extruder main body 11.
6 via a bracket 37. The hook 35 engages with the engagement pin 38 of the operating lever 32 to lock the operating lever 32 when the lock arm 21 pushes the bank bottom plate 16 up to the bank support position iA. ing. In addition, the lock arm 21,
The shaft 22, the operating lever 32, and the like constitute an operating means 39 for raising and lowering the bank bottom plate 16.

In the above configuration, as shown in solid lines in FIGS. 1, 2, and 4, the operation lever 32 is raised and the hook 3 is
5, the lock arm 21 will stand up vertically from the shaft 22, and the roller 24 at its tip will rotate the swing arm 1.
8 to push the bank bottom plate 16 upward;
The bank bottom plate 16 is pressed against the front surface of the extruder main body 11 at the bank holder position A and locked. Therefore, the bank 17 of rubber that accumulates between the extruder main body 11 and the calender rolls 13 and 14 during molding can be reliably received by the bank bottom plate 16, and the rubber can be prevented from leaking downward.

At this time, since the lock arm 21 is in a vertical state, the bank bottom plate 16 can be securely fixed so as to withstand the bank pressure.

When cleaning the front side of the extruder main body 11, the bank bottom plate 16 becomes an obstacle, so it is lowered to the lowered position B and separated below the extruder main body 11. At this time, first, the locking of the operating lever 32 by the hook 35 is released, and the operating lever 32 is tilted backward (in the direction of arrow a) around the shaft 22 (see the imaginary line in FIG. 1). Then, the lock arm 21 rotates together with the shaft 22 in the direction of the arrow a, so the swing arm 18 swings downward (in the direction of the arrow b) around the shaft 20, and the bank bottom plate 16 moves to the lowered position B. Go down.

Note that even if the bank bottom plate 16 is fixed to the extruder main body 11 with rubber or the like, the lock arm 21 and the swing arm 18 are connected by the bending link mechanism 26, so that Swing arm 1
8 is forcibly lowered. Therefore, the bank bottom plate 16 is reliably lowered and rides on the roller 25 of the lock arm 21 as shown by the imaginary line in FIG. By separating the bank bottom plate 16 to the lowered position B in this manner, there are no obstacles between the extruder main body 11 and the calender rolls 13, 14, so that they can be easily cleaned.

In the above embodiment, the swing arm 18 and the lock arm 21 are connected by the bending link mechanism 26, but the bending link mechanism 26 may be omitted.

Further, the operating means 39 includes the lock arm 21 and the operating lever 3.
The present invention is not limited to the structure made up of a hydraulic cylinder 40 and a tapered slider 41 as shown in FIG. 7. That is, the taper slider 41
is provided with a tapered portion 42 for vertically rotating the swinging arm 18, and is supported on the lower side of the extruder main body 11 so as to be slidable in the front-rear direction by a guide mechanism (not shown). Then, the slider 41 is slid back and forth by the hydraulic cylinder 40, and the swing arm 18,
Bank bottom play number 6 may be moved up and down.

(Effects of the Invention) According to the present invention, the bank bottom plate 16 is provided so that the bank bottom plate 16 can be moved up and down between the bank position A and the lowered position B below the bank holder. Since the operating means 39 is provided, leakage of the polymer material can be prevented and cleaning can be easily performed.

[Brief explanation of drawings]

Fig. 1 is a side view showing one embodiment of the present invention, Fig. 2 is a partially cutaway front view of the same, Fig. 3 is a plan view of the same, Fig. 4 is a side sectional view of the same main part, and Fig. 5 is a side view of an embodiment of the present invention. FIG. 6 is a front sectional view of the lock arm, FIG. 6 is a front sectional view of the link mechanism, FIG. 7 is a side view of another embodiment, and FIG. 8 is a sectional view of a conventional example. 11... Extruder main body, 13.14... Calendar roll, 16... Bank bottom plate, 17... Bank, 18... Swing arm, 21... Lock arm,
32... Operating lever, 39... Operating means, A...
Bank receiver is in position B...down position.

Claims (1)

[Claims] (1) A pair of upper and lower calender rolls (13) and (14) are arranged near the front of the extruder main body (11), and at the bottom between the extruder main body (11) and the calender rolls (13) and (14), In a roller head extruder equipped with a bank bottom plate (16) that receives a bank (17) from below, the bank bottom plate (16) is placed at a bank receiving position (A).
) and a descending position (B) below the bank, the bank is provided with an operating means (39) for moving the bank bottom plate (16) up and down. Bottom plate moving device.