Electrostatic charge will result in the following problems when the molten state of the plastic body falls to the open mold:
1 when there is more than one blank on each die, the electrostatic charge always has the same polarity. This type of billet will reject each other. In this case, the object is usually unable to transfer the object to the tool, and the pressure line on the molding product also produces the quality problem.
2 for a single type of billet, when separate type billet is the metal parts of a large number of machine adsorption, it will produce a similar problem.
Blow molding static electricity generation reason:
Any substance is made up of atoms, and the basic structure of the atom is protons, neutrons, and electrons. Scientists will be defined as positive protons, neutrons are not charged, negatively charged electrons. Under normal conditions, the number of protons and electrons in an atom is the same as that of the electron, and the positive and negative balance is balanced, so the external performance is not charged. Get more blow molding knowledge! Please pay attention to "blow molding machine" WeChat public platform, WeChat search Kinggle_song) but because of external effects such as friction or for various forms of energy such as heat energy, kinetic energy, potential energy function, chemical energy will make electricity atomic imbalance. Friction in daily life is essentially a process of constant contact and separation. In some cases, there is no friction to generate static electricity, such as the induction of electrostatic electrification, thermoelectric and piezoelectric electrification, Helmholtz layer, jet electrification, etc.. Any two different material objects as long as the separation of the contact will be able to generate static electricity, the flow of air of course can generate static electricity.
Plastic materials for production and processing of plastic semi-finished or finished products, because most plastic material is a poor conductor, has good insulation properties, so easily in the production process due to handling, contact, separation, friction and collision, involved in electromagnetic induction occasions of static electricity, and long time stay on the surface of the article, cause electrostatic hazard in accumulated to a certain value after the electrostatic pressure. In the plastic industry, there are usually the following methods.
Blow molding electrostatic solution:
1 Chemical Method: in the plastic material to add a moisture absorption effect and the plastic harmless material, to reduce the resistance of the surface of the antistatic agent. According to the type of plastic antistatic agent varieties with different choice; both the ionic and non-ionic antistatic agents are hygroscopic, is the addition of these additives, by these materials absorb moisture in the air, in order to reduce the surface resistance, antistatic performance.
2 physical way: generally the most commonly used anti electrostatic grounding measures, and maintain the environment temperature and humidity. Also can be very easy to produce electrostatic in the work position to install some special use to eliminate static electricity products to eliminate static electricity.
3 in the high-speed plastic molding machine, slitting machine, blow molding machine, plastic machinery equipment installation static elimination equipment can produce effectively eliminate plastic sheet high speed high voltage electrostatic pull, prevent sheet due to electrostatic adsorption between the dust in the air or sheet for static and mutual adhesion, improve production and processing after the plastic sheet products and quality.
4 in the plastic injection molding machine plastic raw materials at the entrance of the installation of electrostatic ion stick, the elimination of raw materials in the flow generated by high voltage static electricity, to prevent the raw material due to electrostatic reasons, Chanse directly affect the production at the entrance.
Bottle blowing machineProfessional manufacturerASNTO|SNTO|Xintai bottle blowing machineHuangyan Zhejiang Plastic Machinery Factory
