Heat tracing cable crosslinked polyolefin insulating layer extrusion die
A technology of cross-linked polyolefin and heat tracing cable, applied in the direction of conductor/cable insulation, coating, household appliances, etc., can solve the problems affecting the eccentricity and concentricity deviation of the insulating layer, and achieve the guarantee of quality and high eccentricity. The effect of concentricity
Inactive Publication Date: 2017-01-04
WUHU XUHUI ELECTRIC NEW MATERIAL
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Problems solved by technology
The factors that affect the eccentricity of the insulating layer of products such as cables or heating cables are mainly divided into two parts: one is the plasticization of the insulating material itself, specifically the melting temperature of the plastic, the shear strain rate of the insulating material, and the melting and heating of the plastic. Mixing time and other process parameters; the second is the concentricity of the cable and the mold when the insulating material is extruded. When the tension of the cable is not enough or the concentricity with the mold is poor, although the cable The concentricity at the extrusion port of the inner mold core can be guaranteed, but the concentricity at the extrusion port of the cable and the outer mold sleeve will have a large deviation, which will affect the eccentricity of the insulating layer
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[0017] refer to Figure 1 to Figure 2 , Figure 1 to Figure 2 It is a structural schematic diagram of a specific embodiment of the present invention.
[0018] Such as Figure 1 to Figure 2 As shown, a heat tracing cable cross-linked polyolefin insulation layer extrusion die includes an inner core 20 for defining the position of the cable to be extruded, and an outer core 20 for extruding insulating material and wrapping the cable. Mold casing 10, the outer mold casing 10 is coaxially sleeved on the outside of the inner mold core 20, and the inner mold core 20 is located upstream of the outer mold casing 10; the inner mold core 20 includes Tapered surface 22, mold core inner plane 23 and mold core outer cone surface 21, described mold core inner cone surface 22 is positioned at the upstream of described mold core inner plane 23, and described mold core inner plane 23 and the cable to be extruded The outer diameter is the same; the outer mold cover 10 includes a mold cover in...
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The invention discloses a heat tracing cable crosslinked polyolefin insulating layer extrusion die. The die comprises an inner die core for defining the position of a to-be-extruded-and-wrapped cable, and an outer die sleeve for extruding an insulating material and wrapping the cable. The inner die core is coaxially sleeved with the outer die sleeve, and the inner die core is located on the upper portion of the outer die sleeve. The die is characterized by further comprising an upper concentric guide sleeve arranged on the upper portion of the outer die sleeve, and a lower concentric guide sleeve arranged on the lower portion of the inner die core, the upper concentric guide sleeve and the lower concentric guide sleeve are coaxial with the outer die sleeve, the upper concentric guide sleeve and the lower concentric guide sleeve both comprise a hard guide sleeve outer pipe and a guide sleeve rubber ring arranged inside the hard guide sleeve outer pipe, and the inner diameter of the guide sleeve rubber rings is the same as the outer diameter of the to-be-extruded-and-wrapped cable. It can be guaranteed that the concentricity of the cable and the die is high, and therefore the eccentricity quality of insulating layers of products such as cables or heat tracing belts can be guaranteed.
Description
technical field [0001] The invention relates to the technical field of processing equipment for cables or heating cables, in particular to an extrusion die for cross-linked polyolefin insulating layers of heating cables. Background technique [0002] The processing technology of products such as cables or heating cables mainly includes drawing, twisting and covering: drawing is mainly used to process the conductive core of cables or heating cables, and the metal rod or thicker metal wire is forced through the mold by pulling force , the cross-sectional area of the metal rod or metal wire is compressed and obtains the required cross-sectional shape and size; twisting is to improve the softness and integrity of the cable or heating cable core, and to overcome the single cable or heating cable core The skin effect exists, and multiple single wires are intertwined together in a predetermined direction; coating mainly refers to wrapping one or more layers of insulating material...
Claims
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Login to View More IPC IPC(8): B29C47/02B29C47/20H01B13/14B29L31/34B29K23/00B29C48/32
CPCB29C48/154B29C48/30B29C48/32B29K2023/00B29L2031/3462H01B13/14
Inventor 鲁旭波
Owner WUHU XUHUI ELECTRIC NEW MATERIAL