How to welded the PVC material board? 5 Comments / Default / By huanggs I prepare to use PVC board (10mm) to make a sulfuric acid pool. What method is the most convenient and practical way to weld it? The more detailed the better. Thank you!
5 thoughts on “How to welded the PVC material board?”
Hot plate welding (to the flat parts), it is a thermoplastic welding process that is softened by the surface of the plastic parts to soften the surface of the plastic parts. Applicable to almost all of the large or small thermoplastic parts. It is particularly suitable for welding the soft semi -crystal thermoplastic plastic.
The on the surface temperature of different mold surfaces is suitable for two different thermoplastic materials. This process is most suitable for welding different materials. Hot plate welding can achieve high welding strength. However, the cycle of this process may be relatively long, and the small system needs 15S, and the large component takes a few minutes.
The polyvinyl chloride has good electrical insulation performance, which can be used as low -frequency insulation materials, and its chemical stability is good. Due to the poor thermal stability of polyvinyl chloride, long-term heating will cause decomposition, and HCL gas is released to change the color of polyvinyl chloride. Therefore, its application range is narrow, and the use temperature is generally between -15 ~ 55 degrees.
During the welding process, if the atmosphere is directly contacting with the high -temperature melting pool, the oxygen in the atmosphere will oxidize the metal and various alloy elements. The nitrogen and water steam in the atmosphere enter the melting pond, and will also form a stagnation of air holes, slag, cracks and other defects in the weld during the cooling process, which worsens the quality and performance of the weld.
It two steel plates with different thickness, in order to avoid severe stress concentration caused by the sharp changes in the cross section, often gradually thinner the thicker plate edge to reach the thickness of the two connectors. The static strength and fatigue strength of the connecting joints are higher than other connectors. Under the interchange, impact load or connection of working in low -temperature and high -voltage containers, welding of docking joints is often preferred.
The pre -welding preparation work of the connecting joint is simple, easy to assemble, welding deformation and residual stress are small, so it is often used in the installation of joints and unimportant structures in the construction site. Generally speaking, the overlapping joint is not suitable for working under the conditions such as the load load, the corrosive medium, the high temperature or low temperature.
Reference materials Source: Baidu Encyclopedia-PVC material
Reference materials Source: Baidu Encyclopedia-Welding
Five common welding methods of PVC:
1. Hot plate welding:
Thermal plate welding (on the flat parts). process. Applicable to almost all of the large or small thermoplastic parts. It is particularly suitable for welding the soft semi -crystal thermoplastic plastic. Because the surface temperature of different mold surface is suitable for two different thermoplastic materials, this process is most suitable for welding different materials. Hot plate welding can achieve high welding strength. However, the cycle of this process may be relatively long, and the small system needs 15S, and the large component takes a few minutes.
2, hot air welding
The welding method is widely used to connect thermoplastic profiles and sheets to produce large parts of welding. It is suitable for the repairs of small injection molding parts, thermoplastic parts and the manufacture of sample parts that require small assembly. The production of electrodes with the same polymer brand as the welding parts is important
3, squeezing welding
The welding method developed from hot air welding. It is mainly used in automatic welding of PVC hard board large -scale structure.
This adhesive can be used to connect plastic parts that connect the same raw material polymer, which are generally used to connect the parts made by different materials. The thermosetry plastic parts connect each other, or the plastic parts are connected to the metal.
The advantages of adhesives include:
The beauty, flexible design; uniform stress distribution; can connect different materials; can provide tight sealing of atmospheric water and gas; Soft substrates are used together; providing electrical insulation and thermal insulation.
The limitations of adhesives: irregularity of joint performance; permanent assembly; comprehensive chemistry process; clean surface; no joint detection; time to achieve maximum intensity.
The adhesive selection
The choice of adhesives of specific applications include: use environment, stress value, substrate surface chemistry, substrate rigid characteristics, substrate thermal expansion coefficient, sewing requirements and application methods Essence
5, solvents bonding
The solvent adhesion is a method that can assemble certain thermoplastic parts, which is most commonly used on the non -fixed thermoplastic plastic parts. Solvent adhesion is a simple and relatively cheap method for sealing the sealing of a solid non -fixed -shaped thermoplastic parts. The low viscosity of the solvent requires that the adhesive parts should be a non -curved and using a relatively tight tolerance mold.
The 10mm board first rolls the slopes around, fix the board, and welded with a double -rooted PVC stuctual hot welding torch. At least three times welded, it is best to six times. The weld should be protruding.
1 Engineering glue, 2 uses hot meltrs to heat
1 Engineering glue, 2 heated with hot meltrs