1. High abrasion resistance, relatively low extrusion pressure and better plasticized screw barrel
2.Design a reasonable and uniform mold
3. Multi-roller calendering system with simple operation adjustment and precise thickness control
4. Membrane-oriented tension control system is accurate and reliable
5. And have enough cooling space and capacity
6. Cutting and moving should not adversely affect the appearance and warpage of the SPC flooring.
7. Manufacturer selection: can not pursue the output one-sidedly, but choose the machine size according to the thickness range of its own plate. 80/92/110 is suitable for the production of different thickness plates. The general configuration of 1: 2: 1 or 1: 3: 1 is more reasonable.
Processing technology and control
1. Formulation and weighing
Different types of weight materials need to use weighing instruments with corresponding accuracy to ensure weighing accuracy.
Integration of materials: It is convenient to store weighing and transfer materials, and it is necessary to check the components and accuracy of sampling. If it is an automatic weighing system, monitoring and review are also required.
SPC Vinyl Flooring
2. Mixture storage
Feeding order: Determine the feeding order according to the feeding method. The automatic feeding and mixing system can be set as: filler ↑ 90 ℃, treatment agent and PVC resin ↑ 95 ℃, stabilizer lubricant ↑ 105-110 ℃, processing aid enhancer ↑ 115 ℃, return material ↑ 120-125 ℃.
Manual feeding: PVC resin + filling material + small material + PVC resin + filling material + PVC resin + return material; one-time feeding, 120-125 ℃ unloading.
Cold mixing: It must be cooled quickly enough to prevent material deterioration, and capable of cooling to 40-45 ° C.
Storage: In order to ensure the uniformity of materials, large storage tanks need to be stored and left for a certain period of time before being used.
After mixing the materials for a certain period of time, it is necessary to test the dry flow of different batches of materials, and to detect the rheological properties of the logistics, as a monitoring means, and provide a basis for analysis and improvement.
Note that there are differences in mixing effects between different mixers, and differences in mixing temperature and time.
3. Extrusion process
The setting of processing technology not only affects the processing level, but also affects anti-slip SPC flooring product quality and production efficiency. It needs to be considered in combination with equipment characteristics, material properties, and formula.
4. Calendering film process
Under the premise of stable extrusion.
Main control: matching of roll gap, temperature, speed, and forward and backward speed.
The clearance and speed of the first pair of rollers determine the basic thickness of the floor and should be determined initially based on the linear speed of the extrusion. The speed of the laminating roller on the back is slightly faster to ensure that there is a certain expansion force and it is not suitable to cause the film to narrow. The traction speed is such that the plate does not deform. Some adjustments are slower depending on the actual situation. Embossing and filming are mainly determined by the roll gap and roll temperature. Different sheet thicknesses and film types use different gaps and temperatures, and consider the effect of traction speed.
5. Stereotypes and other
Because the fire proof carpet style flooring product in the production process has not yet been completely shaped, the cutting flow should not be stressed, and the pallets carried should be firm and flat. Product testing also requires the substrate and the finished product to be sampled for a certain period of time.