Begin To Design & Manufacture Auto Pressure & Vacuum Forming Machine From 1998

Coating of the common problems - White phenomenon

2020-04-27

Mengxing

After coating dry back to white light loss or produce light phenomenon known as the white spots. Is mainly due to the construction environment humidity is too big, Relative humidity & gt; 80%) And solvent volatilization too fast and make the coating surface temperature fell sharply, causing the water vapor agglutination in the film, so that the resin or cellulose ester precipitate, white phenomenon generally quick dry volatile coating ( Thermoplastic acrylic, etc. ) Due to contain a large number of low boiling point solvent and thinner, so prone to white phenomenon. If slow joined moistureproof agent and a moderate amount of high boiling point volatile solvent to adjust the solvent formula, or to improve the construction environment, remove the moisture in compressed air and discharge of oil and water separator of air compressor and regularly, etc all can prevent white phenomenon. Be coated surface temperature is too low, the plastic workpiece heated to a temperature higher than the environment temperature is 10 ℃ can also be less white phenomenon.

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New control design scheme of vacuum forming machine system

Vacuum compound molding technology

Vacuum compound molding technology is generally used in the plastics industry.

Manufacturing technology of vacuum automatic cold

A vacuum type automatic cold and hot forming machine, including a machine unit formed with a heating space and a cooling space, a heating unit, a cooling unit, two vacuum door units, and two handling units, each vacuum door unit having a place The door frame of the machine unit, the door frame drive module, the vacuum door arranged on the door frame, and two vacuum door drivers for driving the vacuum door to move.

Vacuum forming process

The vacuum blister molding process is a thermoforming processing method.

Vacuum forming process of carbon fiber composite

In the production process of carbon fiber composite materials, the vacuum liposuction method can produce large and simple products at low manufacturing costs, and obtain better quality.

Advantages of vacuum forming:

① Use glass fiber roving instead of fabric, which can reduce material cost;

②The production efficiency is 2 to 4 times higher than that of hand lay-up;

③Good product integrity, no joints, high interlayer shear strength, high resin content, good corrosion resistance and leakage resistance;

④It can reduce the consumption of flashing, cutting scraps and remaining glue;

⑤The product size and shape are not restricted.

Its disadvantages are: ① high resin content,

The composite material forming process is the

(3) Resin transfer molding technology (RTM technology);

(4) Bag pressing method (pressure bag method) forming;

(5) Vacuum bag compression molding;

(6) Autoclave forming technology;

(7) Hydraulic kettle molding technology;

(8) Thermal expansion molding technology;

(9) Sandwich structure forming technology;

(10) Molded material production process;

(11) ZMC molding material injection technology;

(12) Compression molding process;

Vacuum forming

Vacuum forming (Vacuum Forming) is often called blister.

The working principle and operation method of1

Advantages of vacuum forming machine

The vacuum forming machine is suitable for vacuum forming of ABS, PS, PE, PC, PP, PVC, HIPS, Acrylic, and other thermoplastic thick sheets with a thickness of 1-10mm, and can produce large-scale plastic products.

Let's take a look at the advantages of the vacuum forming machine:
The vacuum blister molding machine adopts a programmable controller control system.

More than 20 year experience on vacuum forming and auto pressure & vacuum forming machine

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