The mold cartridged heater (also known as the single-head heating tube in the south of China, the electric heating tube for such a outlet mold is called cartridge heater or a single-end electric heating tube) is a kind of electric heating tube, and the application field is widely used. In the plastic mechanical heating system, in the pharmaceutical production line, in the chemical industry, some equipments are used. The mold heating tubes required by different industries are different. How to choose the appropriate mold cartridge heater to use in its equipment?
First, the common type of mold cartridge heater
(1) Single-head electric heating pipes can be specifically divided into:
1. Micro-die cartridge heater: diameter Φ2.2～Φ5.9mm.
2, standard mold cartridge heater: diameter Φ6 ~ Φ25mm.
3, large mold cartridge heater: diameter Φ25 ~ Φ100mm.
4, two semi-circular mold heating tube: two semi-circular mold heating tube is an improved product of ordinary single-end mold electric heating element, it is folded from a semi-circular electric heating element, applying its own strength after folding The die hole achieves close cooperation, has the advantages of large power density, long service life, high heat efficiency, etc. It is a new generation of mold single-end heating element, especially for the mold with high temperature and fast heating speed.
5. Flat mold heating tube: This product is most effective as a heating element in a mold under special conditions, and is used in some tapped mold holes. And other equipment vendors.
6. Hollow mold heating tube: use the hollow tube of the single head tube to quickly heat the air.
7. Cone-type mold heating tube and square mold heating tube These two products are most effective as heating elements in the mold under special conditions, and are used in some tapped mold holes.
(2) According to the standard of exit, it can be specifically divided into:
1. Soft lead mold heating tube: stainless steel soft wire is taken out from the inside of the heating tube, and a fiberglass sleeve is placed on the outside. This process is low in cost and is not easily broken.
2. External wiring mold heating tube: stainless steel hard wire is taken out from the inside of the heating tube by the extraction rod, and then connected to the high temperature line outside the high temperature line. This kind of process is a standard process, and the domestic single-head pipe is such a lead-out method, which has low cost and is widely used.
3. Inner lead mold heating tube: The high temperature line is directly drawn from the inside of the heating tube. This process is costly, but it is not easy to break.
(3) According to the process standards, it can be specifically divided into:
1. PTC self-regulating thermoelectric heating tube: It is made by using rare earth metal instead of traditional electric heating wire. This product can use the resistance property of rare earth metal to automatically control the temperature.
2, high-density mold heating tube: the use of magnesium oxide rods for external winding production.
3, low-density mold heating tube: made of magnesium oxide tube.
(4) According to the power mold heating tube can be specifically divided into:
1. Low power density.
2. High power single head tube.
3. Medium power single head tube.
4, ultra high power single head tube.
Second, the advantages of single-head heating tube
1. Electrical characteristics; filled with 99.5% pure high-temperature insulated magnesium oxide powder as filling material, which has better insulation and pressure resistance through the diameter reduction process.
2, sturdiness; stainless steel material is used to make the jacket of the heating tube shell, the vibration and impact of the machine will not be damaged, and the fasteners are fixed, which is safe and secure.
3, convenient wiring; one end of the line structure can be wired in a limited space, while multiple electric heating tubes are used at the same time, the performance will not interfere with each other.
4, good efficiency; small size, high power, high energy, can increase sufficient heat in a short period of time
5, long life (refers to imported materials); the choice of nickel-chromium alloy wire, high-temperature insulation materials, structure of the outer wire winding production process, life is several times higher than the traditional electric heating tube products.
6, specifications; product specifications and types are non-standard custom, flexible specifications
Third, matters needing attention
(1) The electric heating tube of the mold is actually an air-drying electric heating tube. Because the air is obstructive to heat conduction, the gap between its outer diameter and its insertion aperture does not exceed 0.1 mm, such as the heating rod of the diameter 10 , should be the aperture within 10.1 diameter.
(2) Before the installation of the mold electric heating tube, the residue left in the processing should be cleaned, such as organic oil and other residues, which will be carbonized after heating, thus affecting the ability of heat conduction.
(3) When installing the hole, it should be effective to ensure the coaxiality and size tolerance. For example, use tools such as reamer to trim the processing and finally place the order.
