Prepare the following equipment: electronic scales, disposable plastic cups (or toothpicks, syringes), baking ovens (or greenhouses), vacuums, glue dispensers, etc.

Glue dispensing procedure:

1. Prepare the following equipment: electronic scale, disposable plastic cup (or toothpick, syringe), oven (or greenhouse) and vacuum , glue dispensing machine, etc.

2. Put the disposable cup into the electronic scale, add the appropriate amount of agent A (for example, 20 grams of #0-802 main agent, or 20 grams of 802A main agent that has been adjusted in color), and then Add an appropriate amount of B agent (10 grams of 801B curved surface hardener).

3. Pick up the cup and use a stick to spread it evenly, pour it into the glue bottle, or suck it into the syringe, and then apply it to the appropriate position of the work.

4. Put the finished work into an oven or greenhouse. It can be cured after appropriate temperature and time. It can also be cured naturally when the temperature is high and the relative temperature is low.

1. Prepare the following equipment: electronic scales, disposable plastic cups (or toothpicks, syringes), ovens (or greenhouses), vacuums, glue dispensers, etc.

2. Put the disposable cup into the electronic scale, add the appropriate amount of agent A (for example, 20 grams of #0-802 main agent, or 20 grams of 802A main agent that has been adjusted in color), and then Add an appropriate amount of B agent (10 grams of 801B curved surface hardener).

3. Pick up the cup and use a stick to spread it evenly, pour it into the glue bottle or suck it into the syringe, and then apply it to the appropriate position of the work.

4. Put the finished work into an oven or greenhouse. It can be cured after appropriate temperature and time. It can also be cured naturally when the temperature is high and the relative temperature is low.

With the development of the socialist market economy, the decoration industry, manufacturing industry, etc. have used crystal plastic signs. Such as handicrafts, badges, nail clippers, automobile panels, trademarks, bottle caps and other products, in order to gradually tend to be more arts and crafts, three-dimensional and high-end, and improve the competitiveness of various products. The production of crystal plastic signs must use UV-resistant crystal plastic sign glue (PU glue). It is a modern surface decoration material. Its main components are aliphatic polyisocyanate, various polyether polyols and related catalysts. After curing, it becomes soft UV-resistant elastic crystal glue. Suitable for various substrates, such as PVC, metal badges, copperplate paper and other trademarks, signs, acrylic, etc. with colorful patterns printed on them.

High-end PU crystal glue should have the following properties: good elasticity, no warping for a long time, no ripples, UV resistance, no yellowing (at least 5 years in the sun), good strength, adjustable curing speed, hardness Adjustable: 1. Mechanical dispensing takes 0.5 hours to gel and 8 hours to collect glue; 2. Manual operation takes 0.5 hours to gel, 2 hours to gel and 24 hours to collect glue.

1. The manual operation process is as follows:

1. First put the prepared various substrates, such as PVC, plastic trademarks, and metal badges into the oven to preheat at 60 degrees Treatment, the purpose is to remove moisture from the surface.

2. Place the dehumidified substrate flat on a level operating table and wait for dripping.

3. According to the dosage, take a clean beaker, measure accurately, mix components A and B in a weight ratio of 2:1 and stir evenly (be sure to mix evenly, otherwise the surface will be sticky and sticky) The phenomenon of delamination from the substrate must be achieved by all manufacturers' products) (Note: The proportions of each manufacturer are different and depend on the actual situation). 4. Then put the prepared mixture into the vacuum drying box, turn on the vacuum pump, and remove the bubbles in the mixture under vacuum.

4. Take a clean syringe, suck the defoamed crystal glue into the syringe, then measure and drip evenly onto the pre-prepared substrate (ie: signs, trademarks, etc.) On the surface, the general thickness of the crystal glue layer is 2mm, just let it level naturally (note: the above process is controlled within 30 minutes to avoid the increase in glue viscosity, resulting in inoperability).

5. 3-5 minutes after the crystal glue is instilled on the substrate, observe whether there are bubbles or dust particles on the glue surface. If there are small bubbles, use a pin to puncture them. If there is no flow in the dead corner, Wherever the crystal glue reaches, just use a pin to transfer it.

6. The poured sign will be cured at room temperature of 20℃-30℃ for 10-24 hours to harden and become a crystal sign that does not stick to your hands.

7. In the case of stickers, trademarks, etc., the thickness is very thin and the boundaries are not obvious. When pouring, it is easy to cause the crystal glue to overflow. It is difficult to reach a thickness of 2mm, so the crystal glue must be made with confidence. Depending on the situation, control the viscosity well. During the application process, it can be left for 1-2 hours to increase the viscosity and adapt to the pouring of thin crystal glue.

7. To make a crystal glue sign with a thickness greater than 2mm, it can be dispensed twice. After the first dispense, cure for 3-5 hours and then add another layer.

8. Cleaning after dispensing, whether it is manual dispensing or automated dispensing, the machinery, equipment, and containers need to be cleaned after completion, because the crystal glue is insoluble in any solvent after hardening, so it must Before it hardens, the machine and container need to be cleaned (recommendation: use acetone or absolute alcohol).

2. The mechanical glue dispensing operation process is as follows:

1. First, put the prepared various substrates, such as: PVC, plastic trademarks, metal badges, into the oven at 60 degrees Preheating treatment to remove moisture from the surface.

2. Place the dehumidified substrate flat on a level operating table and wait for dripping.

3. Suck the crystal glue into the two vacuum storage tanks of the glue dispenser. Calculate the volume ratio of the crystal glue according to the specific gravity of the glue dispenser, and then set the flow rate of the glue dispenser. (Note: The volume ratio is different from the weight ratio, because the specific gravity of glue A and B may be different).

4. Keep glue A and B in a vacuum state respectively, turn on the glue dispensing machine, put glue A and B into the mixing tank, and stir under vacuum.

5. Place the pre-prepared substrate (ie: signs, trademarks, etc.) under the dripper to automatically dispense glue. Generally, the thickness of the crystal glue layer is 2mm, and it can be allowed to level naturally (Note: the above process is controlled within 10 minutes to prevent the viscosity of the glue from increasing, resulting in inoperability. The PU glue gel time of mechanical glue dispensing is longer than that of manual glue dispensing. Short (usually 30 minutes for gels, 2 hours for manual gels).

5. 3-5 minutes after the crystal glue is instilled on the substrate, observe whether there are bubbles or dust particles on the glue surface. If there are small bubbles, use a pin to puncture them. If there is no flow in the dead corner, Wherever the crystal glue reaches, just use a pin to transfer it.

6. The poured sign will be cured and hardened at room temperature of 20℃-30℃ for 8 hours to become a crystal sign that does not stick to your hands.

7. In the case of stickers, trademarks, etc., the thickness is very thin and the boundaries are not obvious. When pouring, it is easy to cause the crystal glue to overflow. It is difficult to reach a thickness of 2mm, so the crystal glue must be made with confidence. Depending on the situation, control the viscosity well. During the application process, it can be left for 1-2 hours to increase the viscosity and adapt to the pouring of thin crystal glue.

7. To make a crystal glue sign with a thickness greater than 2mm, it can be dispensed twice. After the first dispense, cure for 3-5 hours and then add another layer.

8. Cleaning after dispensing, whether it is manual dispensing or automated dispensing, the machinery, equipment, and containers need to be cleaned after completion, because the crystal glue is insoluble in any solvent after hardening, so it must Before it hardens, the machine and container need to be cleaned (recommendation: use acetone or absolute alcohol).

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