CN2355867Y

CN2355867Y - Back pressure tracting roller for plastic film blower

Info

Publication number: CN2355867Y
Application number: CN 98243688
Authority: CN
Inventors: 刘会举; 王连清
Original assignee: SHANDONG INST OF PLASTIC AND RUBBER MACHINERY
Current assignee: SHANDONG INST OF PLASTIC AND RUBBER MACHINERY
Priority date: 1998-12-04
Filing date: 1998-12-04
Publication date: 1999-12-29
Anticipated expiration: 2008-12-04

Abstract

The utility model discloses a back pressure pinch roll for a plastic film blasting machine, which is composed of a steel roll (1), a rubber roll (2), cylinders (3, 3') of a pinch roll, a chain wheel (4) and a throttle valve (5), wherein, a back pressure roll (6) is additionally arranged at the outer side of the middle part of the rubber roll (2). A roll (7) of the back pressure roll (6) extrudes the rubber roll (2) under the function of a double-acting cylinder (11), and the phenomenon that the rubber roll (2) bends outward to deform in the production of wide greenhouse films is avoided. Therefore, film bubbles are stable and air tight and can not swing left and right, and the utility model has the advantages of tide coiling, and stable production rate. The quality of products and the rate of finished products are improved, and the utility model can be used for the production devices of the wide greenhouse films.

Description

Plastic film blowing machine back pressure carry-over pinch rolls

The utility model relates to the improvement of plastic film blowing machine carry-over pinch rolls, specifically a kind of plastic film blowing machine back pressure carry-over pinch rolls.

At present, homemade or the import plastic film blowing machine that uses, its first carry-over pinch rolls are by steel rider, rubber roll, cylinder, sprocket wheel, choke valve constitutes, the piston rod of cylinder is connected the two ends of rubber roller, the two ends that are rubber roll are stressed, in carrying membrane process, blown film passes between rubber roll and steel rider, the tension force that bear the centre is bigger, causes rubber roll middle outwardly-bent, forms arc-shaped gaps, especially this arc-shaped gaps is more obvious in rolling over the wide cut awning film production that the footpath is 4-6m, after arc-shaped gaps occurring, often cause the film bubble unstable, swing, it is uneven to cause blown film to batch, and perhaps causes the gas leakage of film bubble, fabric width narrows down.When this phenomenon occurring, often make rubber roll compress steel rider more and solve with the pressure of intensifying cylinder, but this way make the blown film folded edge press tension, cause awning film in use fold line ftracture easily, reduced the blown film quality, strengthened percent defective.And after having reduced the pressure of cylinder, the insufficient clamping force of rubber roll and steel rider causes putting forward film power deficiency, and makes the speed of production instability.

It is a kind of in blown film is produced that the purpose of this utility model is to provide, and especially in the wide cut blown film is produced, can make the film bubble stablize, do not swing, batch plastic film blowing machine back pressure carry-over pinch rolls neat, that the film bubble is air tight, speed of production stable, yield rate is high.

The utility model is achieved in that these plastic film blowing machine back pressure carry-over pinch rolls are made of steel rider, rubber roll, carry-over pinch rolls cylinder, sprocket wheel, choke valve, steel rider is driven by sprocket wheel and rotates, rubber roll is squeezed on the steel rider, the piston rod of two carry-over pinch rolls cylinders is connected the two ends of rubber roller, the movement velocity of carry-over pinch rolls cylinder piston rod and to the extruding force of rubber roll by throttle valve control, a counter-pressure cylinder is set up in the outside, middle part at rubber roll, in order to increase the extruding force of rubber roll middle part to steel rider.These back pressure carry-over pinch rolls also can be implemented by following measure: counter-pressure cylinder is by roller, rocker, balance staff, the counter-pressure cylinder fixed mount, double-acting cylinder constitutes, roller is fixed on the top of rocker, the axis of its axis and rubber roll and steel rider is in same plane, and be pressed on the middle part of rubber roll, rotation with rubber roll is rotated, rocker can be swung around balance staff, balance staff is fixed on the frame protruded arm of counter-pressure cylinder fixed mount, the rocker lower end is connected on the piston rod of double-acting cylinder, double-acting cylinder is fixed on the outstanding frame of counter-pressure cylinder fixed mount, the double-acting cylinder air inlet-outlet pipe becomes oppositely to be connected by choke valve with two carry-over pinch rolls cylinder air inlet-outlet pipes, thereby when rubber roll is outwardly-bent, counter-pressure cylinder firmly pushes rubber roll and avoids crooked, and the counter-pressure cylinder fixed mount is by being bolted on the carry-over pinch rolls fixed mount; The diameter of the roller of counter-pressure cylinder is less than the diameter of rubber roll, and its length is less than the length of rubber roll, and the hypomere length ratio of segment length and balance staff is 2: 3 on the balance staff of rocker.

Advantage of the present utility model: compare with the plastic film blowing machine carry-over pinch rolls of present application, the phenomenon of outwardly-bent distortion no longer appears in rubber roll of the present utility model middle part, extruding between rubber roll and the steel rider is even, so in blown film is produced, that film bubble is stablized is air tight, it is neat not swing, batch, speed of production is stable, improved the quality and the yield rate of product widely, in addition, the utility model also has advantages such as operation easy for installation, easy, processing cost be low.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Accompanying drawing 1 is looked schematic diagram for the utility model master.

Accompanying drawing 2 is looked schematic diagram for the utility model counter-pressure cylinder right side.

Accompanying drawing 3 is the utility model counter-pressure cylinder roller and carry-over pinch rolls rubber roll, steel rider position view.

Manufacture the utility model with reference to accompanying drawing 1,2,3.At first manufacture counter-pressure cylinder 6 according to accompanying drawing 1,2, counter-pressure cylinder 6 is made of roller 7, rocker 8, balance staff 9, counter-pressure cylinder fixed mount 10, double-acting cylinder 11, counter-pressure cylinder roller 7 usefulness steel cylinders are manufactured, diameter is less than the diameter of rubber roll 2, in the wide cut awning film of producing 6m, its length can be 550cm, on the two end axles of roller 7 bearing is housed, and be fixed on the upper end of rocker 8 by bearing block, balance staff 9 usefulness steel rods are manufactured, be fixed on the frame protruded arm of back pressure shaft holder 10, and be connected with rocker 8 by bearing, rocker 8 can be around balance staff 9 swings.The lower end of rocker 8 is connected by the piston rod of pin with double-acting cylinder 11, double-acting cylinder 11 is fixed on the outstanding frame of counter-pressure cylinder fixed mount 10, counter-pressure cylinder fixed mount 10 can weld with flat tube, rocker 8 is 2: 3 in the length of balance staff 9 epimeres part and at balance staff 9 hypomeres length ratio partly, pressure with 7 pairs of rubber rolls 2 of control counter-pressure cylinder roller, with bolt 12 counter-pressure cylinder fixed mount 10 and carry-over pinch rolls fixed mount 13 are fixed together then, its fixed position will make the axis of steel rider 1 of the axis of counter-pressure cylinder roller 7 and rubber roll 2 and band chain wheel 4 in a plane, simultaneously, also to make the center of the center of counter-pressure cylinder roller 7 at rubber roll 2, and compress rubber roll 2, again the air inlet-outlet pipe of double-acting cylinder 11 is connected on the choke valve 5 at last, and by choke valve 5 and two carry-over pinch rolls cylinders 3,3 ' become oppositely to link, when two carry-over pinch rolls cylinders 3,3 ' advance when closing roller, double-acting cylinder 11 indentations, the swing by rocker 8 makes counter-pressure cylinder roller 7 follow and compress rubber roll 2, otherwise otherwise then.

Claims

1, a kind of plastic film blowing machine back pressure carry-over pinch rolls are made of steel rider (1), rubber roll (2), carry-over pinch rolls cylinder (3,3 '), sprocket wheel (4), choke valve (5), it is characterized in that a counter-pressure cylinder (6) is set up in the outside, middle part of rubber roll (2).

2, plastic film blowing machine back pressure carry-over pinch rolls according to claim 1, it is characterized in that counter-pressure cylinder (6) is by roller (7), rocker (8), balance staff (9), counter-pressure cylinder fixed mount (10), double-acting cylinder (11) constitutes, roller (7) is fixed on the top of rocker (8), the axis of its axis and rubber roll (2) and steel rider (1) is in same plane, and be pressed on the middle part of rubber roll (2), rotation with rubber roll (2) is rotated, rocker (8) can be swung around balance staff (9), balance staff (9) is fixed on the frame protruded arm of counter-pressure cylinder fixed mount (10), rocker (8) lower end is connected on the piston rod of double-acting cylinder (11), double-acting cylinder (11) is fixed on the outstanding frame of counter-pressure cylinder fixed mount (10), double-acting cylinder (11) air inlet-outlet pipe and two carry-over pinch rolls cylinders (3,3 ') air inlet-outlet pipe is by the oppositely connection of choke valve (5) one-tenth, counter-pressure cylinder fixed mount (10) is fixed on the carry-over pinch rolls fixed mount (13) by bolt (12).

3, according to claim 1 or the described plastic film blowing machine back pressure of claim 2 carry-over pinch rolls, the diameter of roller (7) that it is characterized in that counter-pressure cylinder (6) is less than the diameter of rubber roll (2), its length is less than the length of rubber roll (2), and the hypomere length ratio that the balance staff (9) of rocker (8) is gone up segment length and balance staff (9) is 2: 3.