As we all know, the production of acrylic products is a hands-on work, especially the brain, from we see a drawing of acrylic products, the next is proofing, through proofing trial production can determine the ideal production process of some products, at the same time, some specific operational problems will come out, which bonding process is a very important skill. Here are some of our common bonding processes.
A brief analysis of their operating skills:
Butt joint
Place the two acrylic plates to be joined horizontally on the operating platform, close them, and paste a tape on the bottom of the seam in advance until both sides are sealed, leaving a gap no wider than 0.3mm for adhesive application. Use a syringe to inject the acrylic adhesive evenly and slowly into the seam from one side until it is fully filled, and remove the tape after it is completely cured.
Facade bonding
Facade bonding is a widely used bonding technology, which is widely used in the production of various acrylic products.
First of all, the surface that needs to be bonded can be wiped clean with pure water, but it is best not to scrub with solvents such as alcohol, otherwise it is easy to cause stress and crack. When bonding relatively large plates, it is best to use a mold, which can fix the bonded material and is not easy to shift, which is conducive to improving the quality of bonding. For the bonding of acrylic plates with a thickness of less than 5mm, the acrylic adhesive can be injected evenly and slowly from one side directly with a syringe. Due to the capillary effect, the adhesive can be filled with the entire adhesive surface to complete the bonding. If the thickness of the acrylic plate is greater than 5mm, place a board horizontally first, apply acrylic adhesive to the part that needs to be bonded, and then put one corner of the other board into it first, and the bonding can be completed by standing upright.
If the quality of the bonding is very high, tape the unbonded parts, leave the parts to be bonded, apply the adhesive, and then perform the above operations to complete the bonding. Once the adhesive has cured,
Remove the tape again. Then the adhesive surface appears clear and transparent, and there is no trace of erosion by the adhesive on the side. But this method of adhesive tape is more troublesome, and this process is generally not used.
Inclined plane bonding
We glue two plates at a 45 degree Angle into a 90 degree Angle bonding method called bevel bonding. Inclined plane bonding must use a 90 degree Angle and other mold in order to prevent the displacement of the glued surface. The acrylic adhesive should be applied evenly and slowly. Wait until the bonding surface is completely firm before you go to the lower mold.
Plane bonding
Plane bonding, also known as laminated bonding, is a common and special bonding method. First of all, the sticky surface should be wiped clean, you can use pure water but can not use alcohol and other solvents to scrub, conditional can remove the static electricity on the surface of the plate. Lay the acrylic plate horizontally, and then apply an appropriate amount of acrylic adhesive to it. The specific amount of dosage should be determined according to the actual situation, not too little, too little flow is not complete the plane, and too much flow is everywhere. Erosion does not need to stick to the area, affecting the appearance. Then slowly contact one side of the other acrylic plate to be coated on the adhesive, slowly flat, the air out from one side to complete the bonding. If the operation is obtained, no bubbles and traces can be seen between the two glued acrylic plates, which are completely transparent and amazing.
Some of the bonding techniques described above, an essential problem is how to completely drive out the bubble, so that the bonding surface is completely transparent, acrylic products show an ideal, crystal-like crystal texture. The other thing is to be careful and slow. Slow work makes fine work. Careful understanding of bonding skills, continuous practice summary is the only way to master wm**** bonding.
There are also some problems to pay attention to when bonding:
1, acrylic plate in the adhesive erosion will leave traces that are difficult to remove, therefore, you can use the method of adhesive to protect the parts that do not need to stick to;
2, grease, dust or bubble hole will prevent the uniform application of the adhesive and leave bubbles, can be removed by cleaning method;
3, the use of too little adhesive will make the adhesive surface can not be completely coated slowly, or in the adhesive curing shrinkage into the air and affect the appearance;
4, direct blowing will make the edge of the adhesive section white due to the rapid volatilization of the adhesive;
5, indoor humidity, temperature, etc., will have a direct impact on the bonding of acrylic;
6, the stress on the surface of the acrylic plate and the surface stress and degradation caused by the cutting tool will affect the bonding effect of the acrylic plate;
Before the products bonded by acrylic adhesives are fully cured, the direct exposure of sunlight for a long time will cause different degrees of yellowing of acrylic products, which will seriously affect the beauty of acrylic products.