Precautions during the blow molding process of a bottle blowing machine

Many people may be familiar with bottle blowing machines, and the most important thing is the machine equipment used to blow bottles. Bottle blowing machines can blow mold plastic particles or softened liquids into the bottles that people need through certain process methods. Compared with other raw materials, plastic hollow containers are not only lightweight and inexpensive, but also have high safety. They can be seen everywhere in our lives, especially in various beverage bottles and other products used at home, which are made of plastic as raw materials and bring more and more convenience to people. However, what preparations should people make after using bottle blowing machines?

1. Before using the bottle blowing machine, it is necessary to carefully check whether the moving parts are stable and whether the screws have softened. If so, they should be tightened immediately to ensure safety and stability during use.

2. For areas with very weak impact force, it is necessary to check whether the belt transmission part is stable, whether there is severe wear, and whether it needs to be replaced and treated. In addition, lubricating oil needs to be added to each component to ensure that the service life of the mechanical equipment is longer.

According to a certain order, repairing the blow molding machine can not only ensure the stable production of the product, but also extend the service life of the machine equipment. Therefore, when it comes to maintenance issues related to bottle blowing machines, it is necessary to accurately follow the following maintenance rules in order to improve product quality and productivity.

1. If the bottle blowing machine malfunctions, it should be repaired as soon as possible. If repairs can be made during power outages or product replacement operations, it will help reduce downtime and never delay machine production.

2. Parts that affect the quality of the bottle blowing machine need to be replaced or repaired every six months. If there are no parts that affect the quality of bottle blowing, their usage time can be shortened to reduce maintenance costs.

3. If small-scale maintenance is required for the blow molding machine, it should be carried out together with the maintenance of the glass furnace to avoid downtime during the production process.

How many problems do bottle blowing machines often encounter during the blow molding process?

1. Thin top and thin bottom: Delay the pre blowing time, or reduce the pre blowing pressure and airflow.

2. Thick at the bottom and thin at the top: opposite to the above.

3. There are wrinkles under the bottleneck: the pre blowing is too late or the pre blowing pressure is too high, or the billet here is cold but not bad.

4. White bottom: The preform is very cold; Excessive stretching; Late pre blowing or low pre blowing pressure.

5. There is a magnifying glass phenomenon at the bottom of the bottle: there is a lot of material at the bottom of the bottle; Pre blowing is very late and the pre blowing pressure is very high.

6. There are wrinkles at the bottom of the bottle: the temperature at the bottom is very low (the heat at the sprue is actually good); Pre blowing is very late, with high pressure and large flow rate.

7. The entire bottle is cloudy (never uniform): it's cold enough.

8. Localized whitening: Excessive stretching, high temperature here, or delayed pre blowing, or touching the stretching rod.

The following are three types of adverse phenomena that occur in bottle blowing machines:

(1) The overall wall of the blow molding machine bottle is very thick. The main reason is that the stretching temperature of the preform is very low and the stretching ratio of the preform is very small.

(2) The bottom of the bottle is thin and the top is thin in the bottle blowing machine. The reason is that the stretching speed is very fast, the first blow molding pressure is very low, and the second blow molding time is never appropriate. During stretching blow molding, the upper temperature of the preform is high and the upper temperature is low.

(3) The bottom of the bottle is thin and the top is thin in the bottle blowing machine. This is caused by slow stretching speed, high initial blow molding pressure, improper control of secondary blow molding time, and improper temperature control of both sides during stretching and blow molding.

How to choose a blow molding machine with a higher price than low

For many people who are new to the plastic bottle industry, there are many things they need to know and learn before purchasing a bottle blowing machine, and they need to purchase according to their own needs. The more expensive the bottle blowing machine, the better it is, but it may not necessarily be suitable for you. Due to the many factors involved in the final production process of the bottle blowing machine, only finding the appropriate one can bring it into play and generate good benefits.

For some large beverage, mineral water, or cosmetics manufacturers, due to the very small amount of packaging used, it is often integrated with product filling. Such blow molding machines should choose fully automatic, high-speed, stable and reliable blow molding machines. Only such blow molding machines will never affect other links in the final production process and overall production efficiency. For some small and medium-sized manufacturers, semi-automatic and two-step blow molding machines can also be considered. On the other hand, it can reduce the cost of purchasing a blow molding machine for the first time. At the same time, such blow molding machines have a relatively high production capacity and are increasingly in line with the needs of manufacturers. Due to the fact that the plastic bottles produced by the blow molding machine are hollow products, if piled up in large quantities, it will create very little pressure on the storage. For some individuals or family workshops, it is advisable to consider using a second-hand bottle blowing machine at the beginning. These types of blow molding machines are quite expensive, and if you understand the parameters in all aspects and purchase them again, there are still many machines worth choosing that are more cost-effective.