PVC shrink film blowing machine/Horizontal blown PVC heat shrink film blowing machine

Product Overview

Description

PVC shrink film machine

Horizontal-blown PVC heat shrink film blowing machine

USAGE of  PVC shrink film blowing machine

PVC shrink film blowing machine is applicable to PVC membrane tube forming technology product Blown Shrink Film, film with good transparency, excellent gloss, high shrinkage, etc., which is popular in today's new packaging materials. It also has been widely used as the outer packages of food, beverages, tea, glass products, handicrafts, sanitary wares, cosmetics, electronic products, and so on.

 

FEATURE of  PVC shrink film blowing machine

1. The barrel, screw and die is made of high-quality steel 38GrMoAIA, precisely formed by heat treatment, and it has the features of high yield, good plasticization effect, and long operating life.

2. The cylinder is sub-chain heated, and the temperature is controlled electronically and automatically, constant temperature.

3. The use of VVVF drive motor enabled the drive smooth and control flexible. The adoption of four times traction made it possible to suit a wide range of the width of the blown film and improve yields.

4. Using new screw diameter ratio: 23:1, which is more suitable for high melt viscosity, thermal stability, raw materials plastination.

5. Using water tank heating system, by heating and through the water tank, the film is very clean and transparent.

6. The design of the machine is reasonable, less power consumption, and high output.

Also it can be used widely in various areas and the quality is reliable. Besides, the operation and maintenance is easy. So it is an economic choice for you.

 

PARAMETER

Type	Horizontal	Vertical
Model	SJRM45*28-400	SJRM60*23/600	SJRM65*23/800		SJRM70*23/1000
Film width	30-400mm	300-600mm	500-800mm		700-1000mm
Film thickness	0.01-0.08mm	0.02-0.08mm	0.02-0.09mm		0.25-0.10mm
Capacity	30kg	40kg	50kg		60kg
TD shrinkage	52%	50-52%	50-52%		50%
MD shrinkage	2%	6%	6%		8%
Screw diameter	45mm	60mm	65mm		70mm
Screw ratio	28:1	23:1	23:1		23:1
Main motor power	11kw	15kw	18.5kw		22kw
Main heating power	10kw	10kw	13kw		16kw
Rewinding motor	3kw	3kw	4kw		5.5kw
Temperature control	6 sets	6 sets	7 sets		8 sets
Traction speed	5-40m/min	5-40m/min	5-40m/min		5-40m/min
Rewinding roll	500mm	700mm	900mm		1100mm
Weight	2.2T	2.5T	3.0T		3.5T
Power supply	380V, 3P, 50Hz
Dimension	9.0*1.6*1.5	5.5*2*3.2		6*2.2*3.6		6.5*2.5*4

Packaging & Delivery

Packaging Detail:

As export standard pallet, the material of pallet is stainless steel pipe the surface of each part of machinery covered film together with one set of packing list in English wooden crate: under fumigation treatment. Together with one set of packing list in English partial shipment allowed container shipment allowed before delivery, we will send the dimension & weight of machinery to customer to help them choose suitable container.

Delivery Detail:

30 - 60 days

 The samples:

 

Parts list of  PVC shrink film blowing machine

 

Part 1. Screw of  PVC shrink film blowing machine

1.1.Overview of screw and barrel

Production of all kinds of screw, barrel, strict selection of high quality alloy steel as raw material, using the latest technology and elaborate processing and testing equipment, to ensure the production of precision and quality, and has long service life and good abrasion resistance, corrosion resistance.The barrel is equipped with water cooling system.

1.2.Screw and barrel main features

The screw material: 38CrMoAl Nitride / 42CrMo intermediate frequency quenching + electroplating
42CrMo bimetallic PTA + electroplating.
Barrel material: 38CrMoAl Nitride / 42CrMo bimetallic alloy PTA inner hole casting.
Surface roughness:Ra0.4 um
Nitriding hardness: HV ≥900 , alloy layer thickness≥ 2 mm
Hardness: HRC58, Nitriding depth: 0.5-0.8 mm
Nitride brittleness≤2 level, Chrome plating layer thickness: 0.03-0.05 mm

 

Part 2. Gearbox of  PVC shrink film blowing machine

2.1.Overview of gearbox

Our extruder gearbox series is designed for screw extrusion equipment of high precision, hard tooth face with thrust transmission device.Product design USES various technical specifications provided by JB/T9050.1-1999.

2.2.Gearbox main features
1, the gear reducer for high strength steel alloy & carburizing steel, gear grinding after carburizing and quenching heat treatment processing, 6 levels of precision, high precision gear, gear hardness HRC54-62, low transmission noise.
2, equipped with high bearing capacity of thrust, reliable performance and can bear big axial thrust.
3, in addition to the individual small specifications products, all configuration has forced lubrication and water cooling system.
4, series gear box body are processed in the six sides.
5, the gearbox transmission efficiency, low noise, can run for a long time.
6, bearing adopt chinese famous Wafangdian brand almost 100 years brand.

Part 3. Rotating die head & cooling water ring of  PVC shrink film blowing machine

3.1.Rotating die head

3.1.1.Rotating die head features

1.Temperature control sensor: 2 points
2. Material: it is made of medium carbon steel S45
3. Adopt strict and tempering heat treatment process and the CNC lathe precision machining, to ensure that each part of die head processing precision is high.
4. Electroplating: the whole die head with environmentally friendly alloy electroplating, plating is more uniform, ensure that the die no dead Angle, die flow easier to clean up, die head is more durable, and the production of thin film surface brighter and higher quality (or according to customer requirements, the hard chromium electroplating).

3.1.2.Rotating die head process

Blown film die head is made up of die bodies (die core, die barrel and die ring) and heater (heating coil).
1. select right material, it is to choose the corresponding materials, for example middle carbon steel S45 .
2. forging, forging the ingredients into a mold of coarse embryos, as part of the more compact the molecular structure of the forging parts of the embryo.
3. The lathe processing, according to the die design drawings of the die head, a lathe processing, as far as possible with high precision lathe, and master skilled lathe technicians.
4. polished the flow way part of the mould after machining by lathe, the better smooth of surface of flow way, the better blown film quality, and the less the defect lines of film.
5. hard chrome electroplating in flow way after polishing, which increase the wear resistance and corrosion resistance, and make the mould is not easy to damage and not easily get stranded.

6. finally, install the die head, combined with heating coil parts.
Blown film co-extruder die head contrast test many times to choose optimal shapes, feature large inner pressure, uniform extrusion stability, better performance of strength of film, no slot with extruder etc. And changes of the proportion of mixture and the recycle material, blown film extruder do not need to replace the die head.

3.1.3.How to adjust the die head of blown film extruder

1. If the die head is covered from top to bottom, loose or release the screw on the thick edge, and tight the screw on the thin side.

2. If the die head open under bigly, and put the die head in above, loose the screw on the thin side, and tight the screw on the thick edge.

3. Die head with four or six adjustment bolt which generally is hex socket, adjust on the edge of upper part of the die head.

3.1.4. How to clean the die head of blown film extruder

Step No. 1. Paint the die head with available paraffin or methyl silicone oil.

Step No. 2. Wipe the paste waste material gently with 1000 mesh sand paper until clean.

Step No. 3. According to the material property, adjust temperature while changing different material because of heating temperature difference of virgin and recycle material, increasing extrusion amount to extrude paste material after replacement of the filtering screen.

Step No. 4. The key is to add methyl silicone oil into the hopper in the process of production within a week, which lubricates the screw, barrel and die head, also clear die head meanwhile.

3.2. Rotating die head

Rotating die head with double tuyere air ring, wind pressure is very strong, the wind ring is cooling fast, so you can speed up the main motor and increase production, also has benefit of thickness deviation.

Part 4.Traction & rewinding parts of  PVC shrink film blowing machine

4.1.Film shaping guide roller of  PVC shrink film blowing machine

Film shaping guide roller is made up of shaping ring and shaping bar. And shaping bar of shaping guide roller is adjustable , and stabilizing bubble frame structure has big adjusting range. It is convenient to operate and adjust, with stable bubble tubular film, create conditions for winding roller.

4.2.Clip board of  PVC shrink film blowing machine

Tractors of extruder is made up of towing, clip board or nip bar, traction roller and traction motor, the unit of traction adopts electromagnetic slip type mechanism, driven two pairs of drawing roller through gear parts, and the rewinding roller meanwhile. Clip board or nip bar is fixed on the shelf, the adjustment of inclined angle of clip board or nip bar can be adjusted freely according to the blown film thickness.

4.3.Film rewinding system of  PVC shrink film blowing machine

4.3.1. Overview

Film thickness is controlled by changing the proportion of the speed of the motor, inverter steady speed is precision, leading to speed stability, and uniform film thickness. Two clip roller and winding roller adopt tension control, the tension of different materials requirements is different, the tension of the rollers should be adjusted independently. Rewinding axis is leaning on the winding roller, relying on the winding roller’s friction to drive the rewinding axis rotation, thus the material tension has nothing to do with the coil diameter

4.3.2. Benefit

The tension is produced by differential speed and frequency converter work under the mode of open loop vector control speed, fast dynamic response, overcome the smaller torque motor speed tension and larger deceleration tension.

The motor constant torque output as speed control. While the linear velocity and tension is constant, the winding roller speed keep constant too, will not be changed by the changing of coil diameter and load line, so overcome faults of constantly adjusting the motor output torque from empty to full volume process, in order to maintain a constant tension.

System is easy to manipulate.

4.4.Rubbe roller of PVC shrink film blowing machine

Nitrile rubber roller which will have deep lines so that it opens LDPE film during work. It is equipped witha few such rollers on my machine. If the film is very thin and it can not get together during work.

Two pairs of traction roller consists of rubber roller and alloy steel roller, can effectively prevent the air to escape and ensure the smooth progress of the coil rewinding. Traction frame adopts assembly structure, outfit is convenient to tear open, which is advantageous to the transportation loading and unloading. Take-up device adopts the center winding of the effective mechanism, and keeping the constant tension, friction piece is driven by sprocket, and the big gear is driven by friction piece, to drive the winding shaft, so as to ensure the re-winder works smoothly while the winding diameter changes from small to big, the friction force can be controlled by adjusting the spring-loaded of edge.

We adopt nitrile rubber roller, also you can choice the Polyurethane and Silicone rubber roller, but we recommend nitrile rubber, because it is of high quality and inexpensive.

The motors have separate cooling fans with 380V. These are more powerful motors of fans. They are of high quality.

Our fan motor wiring is separated from main motor.  

 

Part 5. Electrical components of PVC shrink film blowing machine

5.1.Heater of PVC shrink film blowing machine

5.1.1. Cast aluminum heater features:

Conditions: the environment temperature 20 ℃ ~ + 60 ℃; relative humidity< 80%

Electric strength: passed by 1500V50HZ sinusoidal AC voltage withstand voltage test, when the pressure reach to 1M1N, no breakdown phenomenon.

Leakage current: < 0.5 MA

Insulation resistance: 2MΩ

Grounding resistance: < 0.1 Ω

Power deviation: + 5% ~ -10%

Heat resistance: installed on the machine surface temperature almost up to 400 ℃.

5.1.2. Stainless steel heater features

1. Cr20Ni80 mica heater or thermal system is the heating element, adopt natural mica powder or synthetic mica plate for insulation, outer metal is stainless steel.
2. It is portable mica heater but warming faster.
3. Mica heater shell is made of 0.3 ~ 0.5 mm stainless steel plate, and the middle core the is made of high insulation resistance and anti-high-temperature mica plate, in which evenly around a variety of standard specifications of nickel-chromium alloy resistance wire as a heating element, be processed into various shape by the molding machine.

4.According to the connection mode of user demand, voltage from 110 v, 180 v, 220 v, 380 v, the highest power load reach to 3.5 W per square cent meter.

5. The sintering infrared radiating surface save electricity 35%. Mica stainless steel heater Is ring type.
6. It is simple, reliable and easy to use, feature fast temperature rise, high thermal efficiency, small power consumption and long service life etc.

5.1.3. Cooling fans with heater

The screw and barrelare equippedwith cooling fans.

5.2.Main motor of PVC shrink film blowing machine

If your motor overheat phenomenon occur, I think that it might be caused by 2 reasons:

1. The motor is overload, power is not enough.

2. The motor fan wiring is wrong, the fan motor correct wiring is separated from the main motor wiring, whenever the main motor speed is low or high, the fan power is strong power enough, otherwise, if the fan motor wiring is from the same connection of power supply, fan motor speed and main motor speed work synchronously, the main motor certainly overheat.

All of our fan motor wiring is separated from the main motor.

5.3.Inverter of PVC shrink film blowing machine

Inverter feature
1. Inverter can smooth speed regulation in a certain range, by adjusting the rotational speed of main motor, traction motor to produce different film products;
2. Smooth start and stop, because the plastic extruder is the constant torque load, smooth start and stop is to avoid too much of a mechanical shock, on the other hand also can reduce the start-up process of unqualified products;
3. Run a single direction of motor;
4. Stable performance, reliable work.

5.4.K type thermocouple

K type thermocouple refer to nickel chrome - nickel silicon thermocouple, which is a type of inexpensive thermocouple to measure high temperature.Because of this alloy has good high temperature oxidation resistance, can be applied to oxidizing or neutral medium.It can measure the high temperature of 1000 degrees for a long time, short-term measurable to 1200 degrees.

It cannot be used for reducing property medium, otherwise, it will be corroded soon, in this case can only be used under 500 degree measurement.

It is much cheaper than other thermocouple, its repeatability is very good, the thermoelectric potential is large, thus the sensitivity is high, and it has a good linear property. Although the measuring accuracy is slightly low, but can satisfy completely the requirements of industrial temperature measurement, so it is the most commonly used on industrial thermocouple.

5.5. Solid state relay(SSR) 

5.5.1. Our switch adopt Chint and Delixi etc famous brand in china.

Solid state relay (SSR)with isolation function that is non-contact electronic switch, no mechanical contact parts in the process of switch, so solid state relay is also compatible with logic circuit besides has the same function as electromagnetic relay, resistance to vibration and mechanical shock, install location is unrestricted, has the good performance of moisture-proof, mildew corrosion resistance, the performance in terms of explosion-proof and prevent ozone pollution is also good, small input power, high sensitivity, small control power, good electromagnetic compatibility, low noise and high working frequency etc.

5.5.2. Advantages of solid state relay

(1) Solid state relay feature high life and high reliability. There are not mechanical parts or mobile parts in solid-state relay contact, so they can work stably in high shock, vibration environment, due to the inherent characteristics of composition of the solid state relay components, determines that they are long life and high reliability of the solid state relay.

(2) The solid state relay feature high sensitivity, small control power and good electromagnetic compatibility. Since solid state relay has featured wide input voltage range, low driving power, solid state relay can be compatible with most of the logic integrated circuit which does not need to add buffer or drive.

(3) Rapid transformation: solid state relay switching speed can be from a few milliseconds to a few microseconds because of using solid state relay.

(4) The electromagnetic interference is small.

5.5.3. DC motor regulator and DC motor. We can offer the high quality DC motor and DC motor regular.