Views: 0 Author: Site Editor Publish Time: 2022-05-13 Origin: Site
According to the use of Plastic caps, it can be divided into breathable Plastic caps and air impermeable Plastic caps. Do you know other classifications of Plastic caps? Do you know what its craftsmanship is? What is the difference between the processes? Next, let's take a look at the classification of Plastic caps. Here are some answers.
Here is the content list:
According to the form of Plastic cap, it can be divided into a single-piece cap and a double-piece cap.
According to the production process, Plastic caps can be divided into injection molding caps and compression molding caps.
A single-piece cover means that there is no gasket inside the Plastic cap. The material of the entire cover is the same, relying on folding or inner plug to seal; double-piece cover means that there is a gasket inside the Plastic cap, the gasket material is soft, and it depends on the rebound force of the compressed gasket to keep it sealed. There is no padding for the single-piece cover, and no padding machine is needed, so the equipment investment is less than that for the two-piece cover. And the price of the gasket material is more than twice that of the cover material, and the cost of a single-piece cover is lower than that of a double-piece cover. In addition, monolithic caps have high requirements on the size and shape of the bottle mouth; folding monolithic caps rely on the rebound force of the folding deformation to press the outer edge and end surface of the bottle mouth to seal; inner plug type monolithic caps rely on the outer diameter of the inner plug the interference fit with the inner diameter of the bottle mouth plays a role of sealing. The gasket of the double-piece cap is softer and has a greater tolerance for bottle mouth defects.
Generally speaking, Plastic cap production processes are roughly divided into two types: compression molding cap production process and injection molding cap production process. The production process of the compression molding cover is that the suction machine sucks the mixed material into the compression molding machine barrel, heats it to a semi-melt plasticized state in the barrel, and then quantitatively extrudes it into the mold cavity, and the upper and lower molds are closed. Compression molding, cooling, shaping, demolding, and then cutting the ring and adding pads to complete the production of compression molding caps. The production process of the injection cap is that the suction machine sucks the mixed material into the barrel of the injection molding machine, heats it in the barrel to a molten and plasticized state, injects it into the mold cavity, cools and sets it in the cavity, de-molds, and then after ring cutting and padding, the production of injection caps is completed.
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