How to choose between stretch-resistant wrapping machine and pre-stretch wrapping machine?

The structure of the pallet wrapping machine mainly consists of three parts: chassis, column and film frame. The film frame is divided into stretch-resistant film frame and pre-stretch film frame according to different functions. When purchasing a pallet wrapping machine, many people are still confused about the stretch-resistant film frame and pre-stretch film frame. Today, the editor will briefly introduce:

The main difference between the two is that the mold frame mechanism is different. The stretch-resistant wrapping packaging machine refers to adjusting the friction damping of the stretch-resistant mechanism so that the speed of the passive pulling of the wrapping film is slower than the speed of the rotation of the pallet goods, and the wrapping film is pulled open by the weight of the goods. The stretch-resistant method requires the goods to have a large dead weight, generally required to be more than 1 ton. If the weight is too light, the goods will not be able to pull the wrapping film, but will be pulled by the wrapping film, resulting in normal packaging. For higher goods or loose parts, its packaging stability is not as good as pre-stretching.

The pre-stretching wrapping packaging machine refers to pre-stretching the wrapping film according to a pre-set stretching ratio through the pre-stretching film frame mechanism. Compared with the resistance stretch wrapping machine, the pre-stretch wrapping machine has an additional inverter and film frame motor. Its advantages are uniform winding, beautiful packaging, and strong adaptability (it can be used for light, high or heavy goods). Here is a special note that the film frame motor used in the pre-stretch wrapping machine can be divided into two types: DC motor and AC motor. The film frame uses a DC motor, which is soft and not easy to break the film, has a fast response, does not heat up, is stable, and saves electricity. It is a symbol of technical strength. Therefore, when purchasing a wrapping machine, users can judge the grade of the wrapping machine by whether the film frame uses a DC motor. Which is better, a resistance stretch wrapping machine or a pre-stretch wrapping machine? Under the same conditions, the pre-stretch wrapping machine saves more consumables than the resistance stretch wrapping machine. The stretch ratio of the resistance stretching is 1:1.5 under normal circumstances, while the stretch ratio of the pre-stretching can reach 1:2.5, which effectively saves materials and reduces costs. However, compared with the pre-stretch wrapping machine, the resistance stretch wrapping machine is relatively affordable in the market. In general, it is still based on your needs.