Analysis of Plastic Bottle’s Shape and Process
Pharmaceutical plastic bottles should have sufficient rigidity and beautiful appearance to attract users’ eyes in appearance and ensure that consumers can have numerous choices and usability in use. The most common shapes of medical plastic bottles are round, square, oval, etc. From the perspective of use, they have their own advantages and disadvantages. Circular plastic bottles have high rigidity, but their appearance is not beautiful. Square plastic bottles are beautiful in appearance, but it is difficult to control the uniform wall thickness of plastic bottles during molding.
Pharmaceutical plastic bottles should be well controlled and designed in production, manufactured and produced according to a certain production and processing technology, and have good performance and function, which can fully display important value in the industry.
1) When the surface of medical plastic bottles is labeled, the labeling surface shall be smooth. One can be designed on the surface of the plastic bottle The “frame” enables the label to be positioned accurately without movement. During blow molding, the first contact part of parison inflation always tends to be the first hardening part. Therefore, the wall thickness of this part is also larger. Edge and corner parts are the last contact parts of parison inflation, and the wall thickness of this part is small. Therefore, the edges and corners of plastic bottles should be designed with rounded corners. Changing the surface shape of plastic bottles, for example, the middle part of the plastic bottles is relatively thinner, and increasing the circumferential grooves or ribs on the surface of the plastic bottles can improve the rigidity and bending resistance of the plastic bottles. Longitudinal grooves or reinforcing ribs can eliminate deflection, sagging or deformation of plastic bottles under long-term load.
2) When designing extruded medical plastic bottles, if the material is high density polyethylene or polypropylene, the cross section of the plastic bottle should be rectangular or oval.
Form, For plastic bottles made of low density polyethylene or other flexible plastic bottles, The cross section is preferably circular.
This facilitates the extrusion of the contents from the plastic bottle.
The plastic parts matched with the plastic bottle mouth are mainly covers and sealers.
The Design of Plastic Bottle Mouth Should Focus on Examination ; Think about how to make the plastic bottle mouth better match The cap and sealer are matched with the bottom of the plastic bottle, which is the weak part of the mechanical properties of the plastic bottle. Therefore, the bottom of the medical plastic bottle is generally designed to be concave Shape ; The corners of plastic bottles, as well as the inner recesses, are over-rounded. In order to facilitate the stacking of plastic bottles and increase the stacking stability of plastic bottles, The bottom of the plastic bottle should be designed with an internal groove.
3) The printing surface of the medical plastic bottle, It is the place where consumers pay most attention.
Printing surface should be smooth, Continuous ; If the plastic bottle contains a handle, Grooves, reinforcing ribs and other structures should be designed so as not to cause inconvenience to printing operations. Oval plastic bottle, stiffness is higher, but the mold system The construction cost is relatively high. Therefore, in order to ensure the rigidity of plastic bottles, in addition to selecting materials with high rigidity, the shape design of plastic bottles should be adopted to enhance medicinal use.
Stiffness and load-bearing strength of plastic bottles.
4) Due to the notch sensitivity of most plastics, plastic bottles are prone to crack at sharp corners, root of mouth thread, neck and other parts.
And therefore these parts should be designed with rounded corners. For the transfer of rectangular plastic bottles, it is necessary to support most of the load of plastic bottles because This local increase in wall thickness is also conducive to improving the rigidity and load-bearing strength of plastic bottles.
Pharmaceutical plastic bottles should have sufficient rigidity and beautiful appearance to attract users’ eyes in appearance and ensure that consumers can It has many choices and uses. The most common shapes of medical plastic bottles are round, square, oval, etc. From the perspective of use, they Each has its own advantages and disadvantages. Circular plastic bottles have high rigidity, but their appearance is not beautiful. Square plastic bottles are beautiful in appearance, but it is difficult to control plastic bottles during molding.
The wall thickness is uniform.
Pharmaceutical plastic bottles shall be well controlled and designed in production, and shall be manufactured and produced according to certain production and processing technologies, and And can fully display important values in the industry.
1) When the surface of medical plastic bottles is labeled, the labeling surface should be smooth. One can be designed on the surface of the plastic bottle “ sash ”
To accurately position the label, No movement occurs. During blow molding, the first contact part of parison inflation always tends to be the first hardening part.
Therefore, the wall thickness of this part also Larger. Edge and corner parts are the last contact parts of parison inflation, and the wall thickness of this part is small. So the edges and corners of plastic bottles The bit should be designed with rounded corners. Change the surface shape of the plastic bottle, for example, the middle part of the plastic bottle is relatively thinner, increasing the circumferential grooves or grooves on the surface of the plastic bottle.
Raised ribs can improve the rigidity and bending resistance of plastic bottles. Longitudinal grooves or reinforcing ribs can eliminate deflection and sagging of plastic bottles under long-term load.
Or deformation.
2) When designing extruded medical plastic bottles, if the material is high density polyethylene or polypropylene, the cross section of the plastic bottle should be rectangular or oval.
Form, For plastic bottles made of low density polyethylene or other flexible plastic bottles, The cross section is preferably circular.
This facilitates the extrusion of the contents from the plastic bottle.
The plastic parts matched with the plastic bottle mouth are mainly covers and sealers.