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Check plastic parts |
Investigate the problems of some plastic products and solve them
Not being a pillar
It is a situation that expresses the non-pairing of the mold halves or the components that must be processed together.
1: Weakness in embedding or that created the template
2: BOSCH wear rods or mold locks
3: Mold assembly error
4: Half of the mold may be encrypted in the machine.
Outburst
It is sometimes called the eruption of a worm. This eruption is the flow of melt from the point of entry of the resin and its irregular and irregular spraying into space
solutions :
Injection rate or slows down the injection rate.
Raise the melting temperature.
Raise the mold temperature.
Pollution
Contamination in materials occasionally appears in the form of brown spots or black. Most of the time, the ground and repainted materials are the source of contamination.
The authority used magnetic hoppers to detach iron particles from resins.
Solutions :
Carry resins in terms of how contaminated.
– Clean the cylinder
Clean the funnel, magnets, fillers, and feed line.
100% clean and raw resins
– Clean the mill
Assign a line of materials to a special resin or paint.
– Clear the mold and the flight pins.
Police
Pleats, or vomit, is the excess of plastic parts that, due to the penetration of molten plastic, is attached to the seams between the male and female parts of the mold during the molding operation and remains attached to the fabricated product after the process is completed.
Reduce the pressure if the pleat is made when the mold is filled, and if the pleat is made when closed; Reduce retention pressure.
In services, Ranjbar plastic injection is made and each piece is made with any geometric shape.
Common properties and characteristics of plastics
To address the properties and characteristics of plastic species, we need to look at this material in depth. The chemistry of plastics can be complex, but the basics are normal. If you memorize the school lessons about atoms and molecules, the understanding will be more relaxed. Plastics are chains of molecules that are joined together. The name of this material is polymer.
That is why most plastics start with poly, such as polyethylene, polystyrene and polypropylene. So this is the first common feature of plastics. Another similarity between plastics is that they are made up of carbon and hydrogen, and occasionally oxygen, nitrogen, sulfur, chlorine, fluorine, phosphorus, or silicon. The word plastic encompasses each of these polymers.
Although most polymers are present, plastics are usually model and durable. Plastics can be molded, extruded, cast and swollen indefinitely. He even turned their power into film or foam or even fiber for textiles.
Classification of plastic species
• Polyethylene terephthalate or polyester
Polyester is mostly used for packaging food and juices because it can prevent the infiltration of oxygen and avoid damage to the material inside the plastic. It also inhibits the release of carbon dioxide from juices. The product is different from the plastic bags you see in stores.
• Compressed polyethylene
Compared to other forms of plastic, it is a very special material. Compressed polyethylene has closed polymer chains that cause it to be completely compressed and thus made of hard and wet wet polyester. This plastic is used for grocery bags and luggage, opaque milk bottles, juices, shampoos and medical bottles.
• Polyvinyl chloride
PVC is used in toy furniture, wound adhesive, cold storage bags, detergent bottles, blood bags, etc. After polyethylene, PVC was the second most widely used plastic resin in the world. But now the process of construction and micro-PVC is considered bio-hazardous for environmental pollution and has lost its status.
The continuation of the article is in the next post ……….