Hot melt adhesive machine used in mattress spraying and common problem solving
Company Profile
Suzhou Oushida Hot Melt Adhesive Machinery Equipment Co., Ltd. is a high-tech enterprise specializing in the research and development, production, sales and technical consulting of hot melt adhesive intelligent spraying equipment.
We know that there are many kinds of mattresses, including sponge mattresses, palm mattresses, spring mattresses and 3D mattresses. In the production process of these mattresses, many parts require the use of hot melt adhesive. So what issues should be paid attention to when spraying hot melt adhesive for bonding?
Standardize the glue spraying operation
1. The surface of the non-woven fabric, sponge and other mattress materials to be bonded must be kept clean (remove dirt, oil, moisture, etc.).
2. When spraying hot melt adhesive, the adhesive thread should be in a uniform spiral shape, and the pressure should be evenly applied during bonding, otherwise it is easy to cause poor bonding or partial poor bonding.
Operation precautions
1. Basic parameter settings of hot melt glue machine:
Hot melt glue machine: 150-175℃
Hose: 155-180℃
Nozzle: 160-185℃
Air pressure: 5-8KG/CM²
Glue quantity: 30%-60% of the maximum glue quantity
2. Adjust the air pressure and glue quantity of glue spraying according to different materials: For porous fabrics such as sponges, the air pressure and glue quantity should be appropriately increased.
3. Adjust the glue machine temperature setting appropriately according to weather changes: Generally, the glue temperature in winter should be 5-10℃ higher than that in summer; adjust by about 5℃ each time, and observe the spraying effect after 15-20 minutes until the optimal operating temperature is reached.
4. To maintain a good spraying effect of the hot melt glue machine, poor spraying will have the following effects:
(1) If the glue layer is too thin, it will easily cause problems such as "insufficient adhesion";
(2) If the glue layer is too thick, it will "increase costs" and "slow down the curing speed", and at the same time cause "glue accumulation" and other phenomena, affecting the bonding quality;
(3) If the glue layer is uneven, it will cause "glue accumulation" and "partial debonding" and other phenomena.
How to deal with common problems
1. Can't spray glue or the glue threads are too small to form a spider web?
Analysis of reasons:
1. The glue machine temperature is set too low
2. The glue machine air pressure is not enough
3. The glue machine glue volume is too small
4. The nozzle is clogged
Solutions:
1. Appropriately increase the glue temperature
2. Appropriately increase the air pressure
3. Appropriately increase the glue spray volume
4. Clean the glue box and nozzle in time or regularly
2. When spraying glue, the glue threads are clumped or there is still glue seeping out when spraying is stopped?
Analysis of causes
1. The glue machine temperature is set too high
2. The glue machine air pressure is too high
3. The glue machine has too much glue
4. The nozzle or valve is damaged
Solution:
1. Appropriately reduce the glue temperature
2. Appropriately reduce the air pressure
3. Appropriately reduce the amount of glue sprayed
4. Replace the nozzle or valve in time
3. Is there a lot of smoke and strong odor when spraying glue?
Cause analysis:
1. The glue machine temperature is set too high
2. Circuit failure
3. The glue is mixed with other impurities
Solution:
1. Appropriately reduce the glue temperature
2. Repair the glue melter circuit in time
3. Clean the glue box in time or contact after-sales service
4. Is there a phenomenon of loss of adhesion after bonding?
Cause analysis:
1. The surface of the bonded material is not clean
2. The amount of glue sprayed is not enough
3. The pressing is not in place during bonding
4. It is left for too long after spraying glue before bonding
Solution:
1. Replace the material or clean it up in time
2. Increase the amount of glue sprayed appropriately
3. Standardize the pressing operation
4. Bonding should be completed within 3-5 minutes
Oushida hot melt adhesive machine
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