The specific operation and fault knowledge of the double layer extrusion film blowing machine

If you need it, I can send you a manual to see what products you do, if it is an express bag, it is slightly simpler, if it is a food packaging operation, it is an abnormal phenomenon.

Causes. Solution.

One. The vesicle tube is crooked.

1. The temperature of the body and mouth film is too high.

2. The temperature of the side connector is too high.

3. The thickness of the film is uneven.

1. Reduce the temperature of the body and the temperature of the mouth film.

2. Reduce the temperature of the edge connector appropriately.

3. Adjust the thickness of the film.

Two. A little white or gum particles.

1. There are impurities in the raw materials.

2. The filter screen is broken.

3. The particle mixture is uneven.

1. Sieve the raw materials.

2. Replace the filter.

3. Strictly control the kneading and making process.

Three. The surface of the film is blooming.

1. The temperature of the body or mouth film is too low.

2. The speed of the screw is too fast.

3. The screw temperature is too high or too low.

4. The polyethylene formula is unreasonable (too much lead salt stabilizer or too much cold-resistant plasticizer) 1. Appropriately raise the temperature of the fuselage and mouth film.

2. Reduce the speed appropriately.

3. Adjust the flow rate of screw cooling medium.

4. Improve the formula.

Four. The thickness of the film is uneven.

1. The design of the machine head is unreasonable.

2. The mandrel is deformed in the center.

3. The temperature around the head is uneven.

4. The blowing ratio is too large.

5. Uneven cooling.

6. The compressed air is unstable.

1. Correct and improve the process parameters of the machine head.

2. Change the mandrel.

3. Check the head heater.

4. Change the blowing ratio.

5. Adjust the flow rate of cooling medium.

6. Overhaul the compression pump. Five. Wrinkles.

1. The head is unevenly installed.

2. The thickness of the film is uneven.

3. Insufficient or uneven cooling.

4. The splint or traction roller is not aligned with the center of the machine head.

5. The angle of the splint is too large.

6. The tightness of the traction roller is inconsistent.

7. The coiling tension is not constant.

1. Correct the levelness of the head.

2. Adjust the thickness of the film.

3. Adjust the cooling device or reduce the linear speed.

4. Align with the center line.

5. Reduce the angle of the splint.

6. Adjust the traction roller.

7. Adjust the amount of friction.

Six. Can't pull the traction.

1. The temperature of the machine head is too high or too low.

2. The difference in unilateral thickness is too large.

1. Adjust the temperature of the machine.

2. Adjust the thickness of one side. point,

I have been blowing film for more than ten years. Are you doing high pressure or low pressure, raw material or old material. The specific operation is not the same.

In order to meet the needs of some special functions of plastic film packaging materials in the production process, a variety of characteristic materials (such as breathability, waterproof, heat preservation, toughness, etc.) are blown and co-extruded together to form a multi-functional plastic film, and a multi-layer co-extrusion blown film machine has been developed. The purpose of multi-layer co-extrusion film blowing machine is to give full play to the advantages of a variety of materials and avoid some shortcomings of a single material or a single-layer film blowing machine.

For example, the co-extrusion blown film machine of PP and PE is combined with the characteristics of high hardness of PP material and high brightness of PE material to produce a film with two characteristics combined.

Multi-layer co-extrusion film blowing machine is also divided into the following types, such as second-hand dust layer co-extrusion film blowing machine, three-layer co-extrusion film blowing machine, five-layer co-extrusion film blowing machine, seven-layer co-extrusion film blowing machine, etc. To achieve the purpose of fragrance, freshness, anti-corrosion, airtightness, and prolonging the shelf life.