FDEU風能電纜，江蘇春晨電纜有限公司專業生產FDEU風能電纜，FDEU-40(-55) 0.6/1kV1.8/3kV銅芯乙丙橡皮絕緣聚氨酯彈性體護套風力發電用耐寒(耐嚴寒)耐扭曲軟電纜，，
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.模具的選配依據
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――為模套孔徑（mm）；
D -- for die sleeve diameter (mm);
D ――為模芯出口處外徑（mm）；
D -- as the core outlet diameter (mm);
d ――為擠包后制品外徑（mm）；
D -- for the outer diameter (mm) of the extruded products;
d ――為擠包前制品直徑（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.模具的選配方法
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.配模的理論公式
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――模芯出線口內徑（mm）；
Formula: D - core outlet diameter (mm);
D ――模套出線口內徑（mm）；
D - die sleeve outlet diameter (mm);
d ――生產前半制品zui大直徑（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);
△――工藝規定的產品塑料層厚度（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的說明。
(3) a description of the amplified e or E.
1）絕緣線芯模芯e的放大值為0.5～ 3mm；
1) insulated wire core mould e amplification value is 0.5 ~ 3mm;
2）絕緣線芯模套e的放大值為1～3mm；
2) the amplified value of the insulated wire core module e is 1 ~ 3mm;
3）生產外護套電纜用模芯e的放大值、鎧裝電纜為2～6mm，非鎧裝為2～4mm；
3) production of sheath cable core e amplification value, armored cable is 2 ~ 6mm, 2 ~ 4mm for non armored;
4）生產外護套電纜用模套e的放大值為2～5mm。
4) production of the outer sheath of the cable with a set of e amplification of 2 ~ 5mm.
4.舉例說明模具的選配
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）考慮到實體扇形及zui大寬度，選取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.
模套孔徑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)生產電纜外護套，其型號為VLV，規格為1×240mm ，電壓為0.6/1kV，
2) production of cable sheath, the model is VLV, the specification is 1 * 240mm, the voltage is 0.6/1kV,
選用模具。該電纜成纜后直徑為23.6mm，護套標稱厚度為2.0mm，取模芯嘴壁厚為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.
模芯孔徑 D＝d＋e＝23.6＋3＝26.2≈27mm
The core diameter D = 26.2 = 27mm = De = 23.63
模套孔徑 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). ,
擠壓式 模芯（mm） 模套（mm）
Extrusion die core (mm) (mm)
單線
Single
絞線 導線直徑＋（0.05～0.10）
Wire diameter + (0.10 ~ 0.05)
絞線外徑＋（0.10～0.15） 導線直徑＋2△＋（0.05～0.10）
Wire diameter (0.10 ~ 0.15) + + 2 + delta wire diameter (0.05 ~ 0.10)
絞線外徑＋2△＋（0.05～0.10）
Wire diameter + 2 + delta (0.05 ~ 0.10)
擠管式 模芯（mm） 模套（mm）
Tube extruding die die sleeve (mm) (mm)
絕緣
insulation
護套 線芯外徑＋（0.1～1.0）
Outer diameter of sheath core + (0.1 ~ 1)
纜芯zui大外徑＋（2～6） 模芯外徑＋2△＋（0.05～0.10）
The maximum diameter of the cable core + (2 ~ 6) + 2 + delta core diameter (0.05 ~ 0.10)
模套外徑＋2△＋（1.
Die diameter (1 + 2 + delta
