FDEU风能电缆，江苏春晨电缆有限公司专业生产FDEU风能电缆，FDEU-40(-55) 0.6/1kV1.8/3kV铜芯乙丙橡皮绝缘聚氨酯弹性体护套风力发电用耐寒(耐严寒)耐扭曲软电缆，，
Die arrangement is reasonable, directly affect the quality and yield of extrusion die, it is one of the most important skills. Because of the plastic melt from the change after model, the extrusion line is not equal to the aperture diameter of the die sleeve, on the one hand, the cooling of extruded products traction layer section shrinkage, diameter reduction; on the other hand because the die pressure is reduced to zero, the plastic elastic recovery and swell, and change of material properties, die after plastic the shape and size of the material layer extrusion temperature and extrusion die size and pressure. The size of the mold is determined by the product specification and extrusion process parameters, selection of appropriate tools, is the key to the production of high quality and low consumption of products.
1.模具的选配依据
1 the basis for the selection of the mold
Extrusion mold matching is mainly according to core selection core, according to the product (extruded after) the diameter matching die sets, and according to the process characteristics of plastic, determine the mold core and the mold sleeve angle and the angle difference and sizing area (i.e. bearing diameter) structure size length of die, the tie, pipe extrusion mold with mold is mainly based on the extrusion speed two stretch ratio, the so-called tension than the ring area is in the mouth of the plastic mold and coated with annular area on the ratio of wire and cable, which is formed by the gap between the die sets of core sectional area and thickness ratio of product nominal sectional area, stretching ratio:
K＝（D－D）/（d－d）
K = (a D-D) / (D-D)
其中 D――为模套孔径（mm）；
D -- for die sleeve diameter (mm);
D ――为模芯出口处外径（mm）；
D -- as the core outlet diameter (mm);
d ――为挤包后制品外径（mm）；
D -- for the outer diameter (mm) of the extruded products;
d ――为挤包前制品直径（mm）。
D -- the diameter of the extruded products (mm).
Drawing of different plastics than K are not the same, such as polyvinyl chloride, polyethylene K = 1.2 ~ 1.8 K = 1.3 ~ 2, which can determine the die sleeve aperture. However, the calculation of this method is more complicated, and it is generally used to match the model with the empirical formula.
2.模具的选配方法
Method for selecting and matching 2 moulds
(1) measurement of diameter of semi-finished products: insulated wire core, round wire core to measure the diameter of fan-shaped or U-shaped wire core to measure the width of sheath; cable core armored cable to the largest diameter measuring cable core, for non armored cable to cable core diameter measurement.
(2) check and modify the mold: check core and a mold sleeve inside and outside surface is smooth, round, especially at the outlet (Cheng line) has no cracks, gaps, scratches, bumps, bump phenomenon. Especially the sizing area of the die sleeve and pipe extrusion mould core type tubular long mouth to smooth and round, can use the cloth round's rough friction spinning, until smooth and glossy.
(3) selection of mold, mold armored cable to bigger, because there is a strip joint, the mold is too small, easy to cause the core scraping strip, cable will tear collopse. The mold insulation wire selection should not be too large, should not overdo sth., namely conductor passes, not too loose or too tight.
(4) to process the provisions of the optional die nominal thickness as the standard, according to the selection of core wire or cable core diameter and the amplification value; die sets according to the core diameter and nominal thickness of the plastic layer and the amplification value.
3.配模的理论公式
3 theoretical formula of the distribution model
（1）模芯 D＝d＋e
(1) D = De core
（2）模套 D＝D＋2δ＋2△＋e
(2) die set D = D + 2 + 2 + delta delta e
式中：D――模芯出线口内径（mm）；
Formula: D - core outlet diameter (mm);
D ――模套出线口内径（mm）；
D - die sleeve outlet diameter (mm);
d ――生产前半制品zui大直径（mm）；
D - the maximum diameter of the production of the first half (mm);
δ――模芯嘴壁厚（mm）；
Delta -- mouth core wall thickness (mm);
△――工艺规定的产品塑料层厚度（mm）；
The thickness of plastic layer -- delta established process (mm);
e ――模芯放大值（mm）；
E -- the core value of magnification (mm);
e ――模套放大值（mm）。
E - mode sets of amplification (mm).
（3）放大值e或e的说明。
(3) a description of the amplified e or E.
1）绝缘线芯模芯e的放大值为0.5～ 3mm；
1) insulated wire core mould e amplification value is 0.5 ~ 3mm;
2）绝缘线芯模套e的放大值为1～3mm；
2) the amplified value of the insulated wire core module e is 1 ~ 3mm;
3）生产外护套电缆用模芯e的放大值、铠装电缆为2～6mm，非铠装为2～4mm；
3) production of sheath cable core e amplification value, armored cable is 2 ~ 6mm, 2 ~ 4mm for non armored;
4）生产外护套电缆用模套e的放大值为2～5mm。
4) production of the outer sheath of the cable with a set of e amplification of 2 ~ 5mm.
4.举例说明模具的选配
4 examples of the selection of the mold
1) the production of insulated wire core 3 x 185mm solid aluminum conductor cable, its sector (nominal) width of 21.97mm (the maximum allowable width of 22.07mm), the nominal thickness of the insulation layer 2.0mm. (the minimum thickness allowable value for 2 * 90% - 0.1 = 1.7mm, core nozzle wall thickness of 1.0mm, the selection of mold.
模芯D＝d＋e＝21.97+1.5＝23.47（mm）考虑到实体扇形及zui大宽度，选取D＝24mm。
The core of D = 21.97+1.5 = 23.47 = De (mm) considering the entity fan-shaped and maximum width, select D = 24mm.
模套孔径D＝D＋2δ＋2△＋e
Die diameter D = D + 2 + 2 + delta delta e
＝24＋2×1＋2×2＋3＝33（mm）
= 24 + 2 * 1 + 2 * 2 + 3 = 33 (mm)
2)生产电缆外护套，其型号为VLV，规格为1×240mm ，电压为0.6/1kV，
2) production of cable sheath, the model is VLV, the specification is 1 * 240mm, the voltage is 0.6/1kV,
选用模具。该电缆成缆后直径为23.6mm，护套标称厚度为2.0mm，取模芯嘴壁厚为1.5mm。
Selection of mold. The cable cable diameter is 23.6mm, sheath thickness is 2.0mm, the core nozzle wall thickness of 1.5mm.
模芯孔径 D＝d＋e＝23.6＋3＝26.2≈27mm
The core diameter D = 26.2 = 27mm = De = 23.63
模套孔径 D＝D＋2δ＋2△＋e
Die diameter D = D + 2 + 2 + delta delta e
＝27＋2×1.5＋2×2＋4＝38mm
* * = 272 1.52 24 = 38mm
3) in the actual production process, mold selection often in practice or the production process card gives some empirical formula, such as mold matching formula a factory with 65 extruder are (a plastic extrusion nominal thickness of cladding). ,
挤压式 模芯（mm） 模套（mm）
Extrusion die core (mm) (mm)
单线
Single
绞线 导线直径＋（0.05～0.10）
Wire diameter + (0.10 ~ 0.05)
绞线外径＋（0.10～0.15） 导线直径＋2△＋（0.05～0.10）
Wire diameter (0.10 ~ 0.15) + + 2 + delta wire diameter (0.05 ~ 0.10)
绞线外径＋2△＋（0.05～0.10）
Wire diameter + 2 + delta (0.05 ~ 0.10)
挤管式 模芯（mm） 模套（mm）
Tube extruding die die sleeve (mm) (mm)
绝缘
insulation
护套 线芯外径＋（0.1～1.0）
Outer diameter of sheath core + (0.1 ~ 1)
缆芯zui大外径＋（2～6） 模芯外径＋2△＋（0.05～0.10）
The maximum diameter of the cable core + (2 ~ 6) + 2 + delta core diameter (0.05 ~ 0.10)
模套外径＋2△＋（1.
Die diameter (1 + 2 + delta
