Problems and causes of bottle blowing machine products
Release time:
2024-04-09
As a plastic product production machine, the bottle blowing machine sprays out liquid plastic, uses the wind generated by the machine to blow the sprayed plastic onto a mold cavity with specific properties, and cools it to form the product to be produced. This method improves production efficiency. In the daily production process, there will be some problems with the bottle blowing machine. Let Yucheng Machinery take you to understand these problems and their causes.
As a plastic product production machine, the bottle blowing machine sprays out liquid plastic, uses the wind generated by the machine to blow the sprayed plastic onto a mold cavity with specific properties, and cools it to form the product to be produced. This method improves production efficiency. In the daily production process, there will be some problems with the bottle blowing machine. Let Yucheng Machinery take you to understand these problems and their causes.
1. The transparency of the product is not good. The reasons may be: the preform is opaque, the secondary heating temperature is too high, the secondary heating time is too long, there is moisture in the blowing air, the surface of the blow mold is rough, etc.
Solutions: 1. Dry the raw materials and use high-transparency preforms 2. Reduce the oven temperature 3. Shorten the heating time 4. Use a freeze dryer to remove moisture 5. Polish the mold surface.
2. The product has a pearly luster and white bottom gate position is offset. The reasons are: the preform blow molding temperature is too low, the bottle blowing time is advanced, the preform temperature is uneven, the stretching line speed is too low, etc.
Solutions: 1. Increase the secondary heating temperature and extend the secondary heating time. 2. Slow down the blowing time. 3. Change the temperature distribution of the oven. 4. Increase the stretching line speed.
3. The product cannot be formed. Reasons: Insufficient blow molding air pressure, insufficient blow molding air flow, too slow blow molding air pressure rise rate, excessive tensile force, and unequal secondary heating speed.
Solutions: 1. Increase air pressure 2. Increase air flow 3. Improve the pressure regulating structure to increase the speed of air pressure rise 4. Choose a reasonable stretching force during design 5. Adjust the temperature of the baking oven.
4. The wall thickness of the product is uneven. Reasons: uneven wall thickness of the parison, uneven temperature of the parison, too low stretching rate, and offset of the stretching rod.
Solutions: 1. Adjust the preform 2. Adjust the oven temperature distribution 3. Increase the stretching ratio 4. Adjust the stretching rod.
5. The product is thin in the middle. Reasons: the stretch-blow temperature is too high, the temperature in the middle of the parison is too high, etc.
Solution: reduce the stretch-blow temperature and lower the heating temperature in the middle of the oven.
6. The product is thin on the top and thick on the bottom. Reasons: the stretching and blowing line speed is too high, the blowing time is improperly selected, the stretching and blowing temperature is inappropriate, etc.
Solutions: 1. Lower the blowing temperature; 2. Slightly advance the blowing time; 3. Adjust the heating temperature of the oven, lower the temperature of the bottleneck part and increase the temperature of the bottom part.
7. The bottom of the product is thin and the top is thick. Reasons: the stretching and blowing line speed is too low, the blowing time is improperly selected, the stretching and blowing temperature is inappropriate, etc.
Solutions: 1. Increase the blowing speed 2. Delay the blowing time 3. Increase the upper temperature of the oven and lower the bottom temperature. Bottle blowers should always pay attention to check the quality of the bottles.
Zhangjiagang Yucheng Machinery Co., Ltd. is a manufacturer engaged in the research and development of fully automatic bottle blowing machines. Over the years, based on the reference of foreign technology and combined with our many years of experience in producing hollow blow molding machines, our company has a relatively mature set of production technology and manufacturing processes.
The company provides a full set of pre-sales and after-sales services including installation and commissioning, maintenance, training, technical consultation, etc. With advanced technology, reliable quality, reasonable price and perfect after-sales service, we aim to provide you with satisfactory products and services.
这里是标题一h1占位文字
Hot information
Get Best Quote:
Fenghuang Intelligent Industrial Park, No. 8 Jifu Road, Zhangjiagang City,Jiangsu , China
Pay attention to Eceng machinery
Get Best Quote