1 shoulder shape
The connection between the bottle neck and the bottle body is transitioned by the bottle shoulder. Avoid sharp-edged end shoulder shapes. The shape of the shoulders is gentle, the thickness of the glass is evenly distributed, the stress is also evenly distributed, and the vertical load strength is good. Since the sliding shoulder is subjected to less stress, it has good mechanical impact resistance and water impact resistance. It is recommended that the inner and outer arcs R1 and R2 of the shoulder be 78° and 110°, respectively.
2 bottle heel shapes
The fillet at the heel of the bottle should be appropriately large. In this way, the contact surface of the bottom of the bottle is reduced, the heel of the bottle is not easy to be scratched, and there is no obvious corner, the thickness difference is relatively small, and the internal stress and surface scratches will not be concentrated on the same position,
so the thermal shock resistance, Vertical load distribution uniformity and water impact strength will be stable. Based on the experience of Guilin Jingsheng Glass Co., Ltd., it is considered that the arc radius of the bottom corner of the bottle is R=45°, and it is recommended to determine the radius of the arc of the bottom corner in the GB4544 outline legend as R3=45°.
3 About the thickness of the bottle wall
The uniformity of the thickness distribution of the bottle wall is an important factor affecting the strength. In general bottle and can standards, the glass distribution is controlled by specifying the wall thickness of the thinnest part and the quality (weight) of the bottle and can.
During the sterilization process, glass bottles and jars need to withstand drastic changes in temperature. When the tensile stress exceeds the strength of the glass, it will break.
The thermal shock resistance is related to the thickness of the bottle wall, the thicker the bottle wall, the easier it is to break. In the production process of beer bottles, in addition to stabilizing the bottle weight and the thickness of the thinnest part, it is also necessary to pay attention to the uniform distribution of thickness. The ideal thickness is that the thickness ratio of the bottle body section is not more than 1 times, and the internal stress is not more than 3 grades.
Beer bottle GB4544 only stipulates that the thickness of 640mL bottle is not less than 2.0mm. Guilin Jingsheng Glass Co., Ltd. refers to foreign regulations on the thickness of various bottles and cans, and according to the actual production of beer bottles and the filling effect of beer manufacturers, the thickness of 300-355mL bottles is not less than 1.6mm, and the thickness of 500mL bottles is not less than 1mm. .8mm, 600 ~ 700mL bottle thickness not less than 2.0mm.
With the continuous improvement of people's living standards, there will be more and more varieties of food and its packaging, and the quality requirements will become higher and higher, and the discussion on product standards will continue in depth. In the future, cooperation and interaction between beer companies and beer bottle companies will help you understand the relevant
Related technologies, equipment performance and process flow should be strengthened to facilitate the simultaneous development of the two enterprises, and to jointly provide the market and consumers with more quantity and better quality products.
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