Mold heating tube (also known as single-head heating tube, in southern China, this kind of one-end electric heating tube for molds is called single-end electric heating tube or single-ended electric heating tube) is a kind of electric heating tube, and its application fields are very wide. It can be used in plastic machinery heating systems, pharmaceutical production lines, and some equipment in the chemical industry. Different industries require different mold heating tubes. So how to choose a suitable mold heating tube for use in its equipment?
1. Common types of mold heating tube products
(1) Single-head electric heating tubes can be specifically divided into:
1. Micro mold heating tube: diameter Φ2.2～Φ5.9mm.
2. Standard mold heating tube: diameter Φ6～Φ25mm.
3. Large mold heating tube: diameter Φ25～Φ100mm.
4. Two semi-circular mold heating tubes: Two semi-circular mold heating tubes are improved products of electric heating elements for common single-ended molds. The mold hole is closely matched, has the advantages of large power density, long service life, and high heat efficiency. It is an updated product of mold single-ended heating element, especially for mold heating that requires high temperature and fast heating speed.
5. Flat mold heating tube: This product is the most effective as a heating element in a mold under a special environment, and it is used in some taper mold holes. And other equipment vendors use.
6. Hollow mold heating pipe: Use single-head hollow pipes to quickly heat the air.
7. Cone mold heating tube and square mold heating tube are the most effective heating elements in the mold under special environment, and they are used in some taper mold holes.
(2) According to the outgoing standard, it can be divided into:
1. Flexible lead mold heating tube: The stainless steel soft wire is drawn from the inside of the heating tube, and the glass fiber sleeve is sheathed on the outside. This process has low cost and is not easy to break.
2. External wiring mold heating tube: the stainless steel hard wire is led out from the inside of the heating tube by the lead rod, and then connected to the high temperature wire and the high temperature wire outside. This process is a standard process, and domestic single-head tubes are all drawn in this way, with low cost and widely used.
3. Inner lead mold heating tube: The high temperature wire is directly drawn from the inside of the heating tube. This process has a high cost, but it is not easy to break.
(3) According to the process standard, it can be divided into:
1. PTC self-control temperature electric heating tube: It is produced 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: It is produced by using magnesium oxide rod to wind the wire outside.
3. Low-density mold heating tube: It is made of magnesium oxide tube for wire transfer.
(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 mold single-head heating tube
1. Electrical properties; 99.5% pure high-temperature insulating magnesium oxide powder is filled as the filling material, and the diameter reduction process makes it better in insulation and pressure resistance.
2. Robustness: The heating tube shell sheath is made of stainless steel, which will not be damaged by mechanical vibration and impact, and it is fixed with fasteners to ensure safety.
3. Convenient wiring; one end of the wire structure can be connected in a limited space, and multiple electric heating tubes can be used at the same time, and the performance will not interfere with each other.
4. Good efficiency; small size, high power, high energy, can increase sufficient heat in a short time
5. Long life (referring to imported materials); the use of nickel-chromium alloy wire, high temperature resistant insulation material, and the production process of outer structure wire winding, the life span is several times higher than that of traditional electric heating tube products.
6. Types of specifications; product specifications and types are non-standard customized, flexible specifications
Three, matters needing attention
(1) The mold electric heating tube is actually an air dry-fired electric heating tube. Because air hinders heat conduction, the gap between its outer diameter and its insertion hole diameter does not exceed 0.1mm, such as a heating rod with a diameter of 10 , Should be the hole diameter within 10.1.
(2) Before installing the mold electric heating tube, the residue left in the processing, such as organic oil, will be carbonized after heating, which will affect the heat transfer ability.
(3) The coaxiality and size tolerance of the mounting hole should be effectively ensured during processing. For example, a reamer and other tools should be used to trim the processing.
The above is the answer to how to choose the mold heating tube. I hope you can know how to choose the mold heating tube through this article. Our company has been engaged in the heating pipe industry for more than ten years, and can be designed according to the drawings (voltage, power, size) provided by the customer or by our technicians according to the conditions you need. After confirming to you, the final order is placed.
