Technical question eight, how can plastic parts be combined?

I encountered a problem when communicating with a customer not long ago. Can the customer use environmentally friendly glue to deal with the bonding problem of plastic parts?

Because the customer is a foreigner, the language is different and the way to understand the problem is different. At first, we thought this was a special requirement of the customer, and the plastic parts should be glued, but after careful consideration, this operation is obviously wrong.

First of all, not to mention that the glue is not environmentally friendly, but the adhesion at the joint does not meet the food requirements of the product. After repeated communication with the customer, it was finally realized that the customer did not understand the combination of plastic parts. It is believed that when purchasing plastic products for the first time, customers think that the bonding between plastics is by glue.

There are many ways to combine plastic parts. In the water cup industry, hardware connection and ultrasonic welding are more commonly used. Hardware connection means that two plastic parts connect the two together through metal parts. This method is more used in the flip of the lid of the water cup or the movable parts.

Ultrasonic welding is relatively more widely used, and its function is to firmly weld two different plastic parts together by welding. The principle of ultrasonic welding is to make the contact parts of two plastic parts rub at high speed through high-frequency vibration, so as to melt the part, and then combine the two parts.

There are two working methods of ultrasonic welding, direct superposition and rotary superposition. The direct super is suitable for processing between plastic parts with a large contact surface, and the spin super is suitable for the processing of different plastic parts with a small contact area. Ultrasonic welding will not change the material properties, and it will not cause damage and pollution like glue. The effect of ultrasonic welding is not comparable to glue bonding in terms of completeness, aesthetics or firmness.

Dongguan Zhanyi Commodity Technology Co., Ltd. mainly produces various types of drinking utensils such as stainless steel water cups, plastic water cups and kettles. Our company has a complete automatic paint spraying and powder coating production line, which can be processed in customized colors according to customer requirements. As of December 2020, we have provided product innovation services to more than 200 customers around the world. Global buyers are welcome to visit our official website, and we will have professional customer service staff online to provide you with services.