Analysis of the causes of burrs in the effervescent tube

The effervescent tube is a special packaging for candy tablets such as effervescent tablets. It is composed of a bottle cap and a bottle barrel. Generally, injection molding technology is used in the processing method. However, burrs will appear during the production process. What is the cause?

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There are many reasons for the burrs of the effervescent tube, which can be analyzed from the following aspects:

1. The clamping force is too low

Compared with the projected area of the molded part, if the clamping force is small, there will be a gap between the movable mold and the static mold due to the injection pressure, which inevitably produces burrs. Especially when the side gate is placed on the hole close to the center of the p art, since the molding gate requires a large injection pressure, it is very easy to produce burrs.

2. Deformation of the injection mold

If the originality of the mold is insufficient, it will deviate due to the injection pressure. If there is a hole near the center, burrs will be generated around the hole. When using the center hole to open the side door, the hole and the perimeter of the runner will also be created. glitch. The burrs generated for this reason are caused by poor mold manufacturing and are therefore difficult to repair. Reinforcing the mold can reduce burrs.

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3. Plastic fluidity is too good

Just because the fluidity of the plastic is too good, theoretically speaking, it is not the cause of the burr. However, when the fluidity of the plastic is too good, even a small gap may be penetrated by the plastic, so burrs are prone to appear. In order to eliminate such burrs, the melting temperature or injection pressure can be reduced, and the mold temperature or injection speed can also be reduced.

4. There are foreign bodies on the surface of the injection mold

Foreign matter on the clamping surface of the mold will inevitably produce burrs. In order to solve this problem, it is obvious that the surface of the mold must be cleaned to close the clamping surface.

Burrs in the effervescent tube can be analyzed from the above aspects to find out the specific reasons to ensure the quality of the finished product.