Tips of making or sewing or production of dust collector filter bags
There are many process steps from raw material to finished and complete dust collector filter bags, the quality must be controlled seriously in during every process step. The quality problems of dust collector filter bags mostly occur at following places: filter bag materials, diameter of dust collector filter bag top, snap band used at dust collector filter bags and sewing thread.
During dust collector filter bags sewing or making, following points need to be noted:
1. Length of dust collector filter bags: If the bag is too long, the bag bottom will be worn easily, especially within 100 mm part from bag bottom. The main reason is that when the dust collector filter bag length is larger by 30 than the matching support filter bag cage, large contraction of filter bags occurs, the part within 100 mm distance from bag bottom will have a brush with support cage bottom, and cause filter bag damaged finally. In most case, the wear print is from inside to outside and filter bag is damaged at the bag bottom wrinkles.
2. Snap band of dust collector filter bags: Snap band has relationship of dust collector filter bag sealing and load-bearing and other important working performances.
Broken of snap band is mainly caused by two reasons:
A. not suitable storage of filter bag causes snap band corrosion.
B. The snap band is too hard and too fragile. Generally, first reason has relationship with buyer or end user, the second reason has relationship with dust collector filter bag suppliers.
When snap band is soft, as long as it does not affect the dust collector filter bag installation, snap band is acceptable and working.
When snap band affect the installation of dust collector filter bags, shall ask filter bag supplier to replace it.
3.Thread broken of dust collector filter bags: Sewing thread broken is mainly caused by abrasion, there will be wear print at the damaged area. Sewing thread is also possibly caused by not suitable sewing thread, this probability is very low. The broken area is with crushing shape, when strength is becoming lower, it breaks.
4.Testing or inspection of dust collector filter bags: professional testing or inspection tools and perfect quality control system is very important for guarantee of dust collector filter bag quality. Facing more and more intense competition in the filter material market, there are a few supplier will make a discount of their material quality. During buying dust collector filter bags, following points shall be noted:
Point 1: There are many process steps from raw material to finished and complete dust collector filter bags, the quality must be controlled seriously in during every process step. The quality problems of dust collector filter bags mostly occur at following places: filter bag materials, diameter of dust collector filter bag top, snap band used at dust collector filter bags and sewing thread.
Point 2: Using wrong filter material or elements is a stupid mistake for suppliers, but there is a few of supplies who are using poor material to save cost. For one complete dust collector filter bag, all the materials on different part shall be same, or using higher level material to replace, cannot use lower-level material to replace. For example, for PPS dust collector filter bags, ptfe(teflone) sewing thread is available, but fiberglass thread is not working.
Point 3: The diameter of bag top determines the sealing ability between dust collector filter and cell plate hole sheet. Before production of dust collector filter bags, to avoid mistake, supplier shall make good communication with buyer about the hole diameter(cell plate hole diameter). If the filter bag top diameter is too large, you can cut some material at the groove of dust collector filter bag with equal distance, the cutting length shall be less than 20 mm, doing this can reduce the bag outside diameter, then bag installation will be convenient.
If the filter bag top diameter is too small, you can cover band strip the outside of filter bag top, the snap band strip is with same material with bag top, snap band strip is 300-400 mm long, exact length shall be as per exact bag installation condition.
