• Technology For Bottle Blowing
Overview of  PET bottle blowing machine

Overview of PET bottle blowing machine

2022-03-21 PET bottle blowing machine is a PET (full name: polyethylene terephthalate) material blowing equipment, mainly used for carbonated beverage bottles, mineral water bottles, cosmetic bottles, oil bottles, medicine bottles and other plastic hollow containers blowing Bottle making. At present, the PET b...

Read More

Basic knowledge about bottle blowing

Basic knowledge about bottle blowing

2022-03-21 Bottle mouth type: common bottle mouths are 28 (1810 and 1881), 30-25, 29-25, 38.The 28mm screw thread with 28mm diameter is generally used for water, carbonated beverages, juice, tea, and carbonated beverages.The outer diameter of the 30-25 mouth bottle thread and the inner diameter of the bottle t...

Read More

Principles of blow molding

Principles of blow molding

2022-03-21 PET is divided into three forms: glass state, high elastic state, and molten stateThe glass transition temperature of PET is about 80 degrees, and the crystallization temperature is about 150 degrees. The state between the two is generally called the high elastic state, and the preform can be blown...

Read More

Stretching ratio of the bottle

Stretching ratio of the bottle

2022-03-21 Axial stretch ratio: 2.4~2.6Radial stretch ratio: 4~4.5Total stretch ratio = axial x radial = 8~12 timesGenerally, the water bottle is about 16 times, and the hot-filled bottle is about 10 times.Therefore, the customer’s bottle shape for the customer allows them to provide suitable preforms. If the...

Read More

1. How to adjust the eccentricity of the bottom of the bottle?

1. How to adjust the eccentricity of the bottom of the bottle?

2022-03-21 1. Check the gap between the stretch rod and the bottom mold, and verify it with random tooling.2.Whether the bottom temperature of the bottle is too high.3. The pre-blowing flow is too large.4. The pre-blowing pressure is too high.5. The pre-blowing time is too early.6. The...

Read More

2. Why is the bottle partially whitish?

2. Why is the bottle partially whitish?

2022-03-21 1. Excessive stretching2. The temperature here is low3. The pre-blowing time is too early4. The temperature here is too high, causing local crystallization (white and opaque)...

Read More