CN104057600B - 一种耐寒pvc电缆料的制造方法 - Google Patents
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- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C2948/00—Indexing scheme relating to extrusion moulding
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Abstract
本发明公开了一种耐寒PVC电缆料的制造方法,其解决了PVC树脂无法吸收大量增速剂的问题,同时克服了后期传统双螺杆挤出时塑化物料造成物料温度难以降低的缺陷,达到提高生产效率的目的。高混机混料时,预先加入PVC树脂高速搅拌,在PVC树脂温度达到50℃~75℃时,添加增塑剂,混合3分钟~4分钟后添加其余粉料,待料温达到105℃~115℃时,启动低速搅拌,待料温到达120℃~130℃时停止搅拌,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒。
Description
技术领域
本发明涉及PVC电缆料的生产的技术领域,具体为一种耐寒PVC电缆料的制造方法。
背景技术
随着耐寒PVC电缆料的研发应用,现有的耐寒PVC电缆料均采用普通电缆料生产方式进行生产,即按照如下步骤生产:同时加入PVC树脂、增塑剂、碳酸钙,在高混机内高速混合搅拌至一定温度,之后经双螺杆、单螺杆挤出造粒,然而现有的制造方法在生产过程中存在高混机搅拌塑化不均匀、加工工艺狭窄,其在较低温低速挤出时容易塑化不良、较高温高速挤出时粘粒过多,影响生产效率。存在这些弊端的原因是耐寒电缆料一般添加大量增塑剂导致无法使PVC树脂在高混机内完全吸收增塑剂,造成高混机塑化不均匀,导致产品在做成电缆后容易生成小疙瘩。挤出造粒时,使用正常温度及挤出速度生产产品时,由于产品软化点很低,切粒无法完成,而降低温度生产又会造成产品塑化不良。
发明内容
针对上述问题,本发明提供了一种耐寒PVC电缆料的制造方法,其解决了PVC树脂无法吸收大量增速剂的问题,同时克服了后期传统双螺杆挤出时塑化物料造成物料温度难以降低的缺陷,达到提高生产效率的目的。
一种耐寒PVC电缆料的制造方法,其特征在于:高混机混料时,预先加入PVC树脂高速搅拌,在PVC树脂温度达到50℃~75℃时,添加增塑剂,混合3分钟~4分钟后添加其余粉料,待料温达到105℃~115℃时,启动低速搅拌,待料温到达120℃~130℃时停止搅拌,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒。
其进一步特征在于:
高混机混料时的高速搅拌具体是指转速在1100转/分钟~1300转/分钟;高混机混料时的低速搅拌具体是指转速在700转/分钟~900转/分钟;
所述其余粉料包括碳酸钙、稳定剂、润滑剂;所述稳定剂为钙锌复合稳定剂,钙锌复合稳定剂包括硬脂酸钙、硬脂酸锌;所述润滑剂包括聚乙烯蜡、硬脂酸;
所述双螺杆挤出机内的温度为:一区125℃~135℃、二区125℃~135℃、三区125℃~135℃、四区120℃~130℃、五区110℃~120℃、六区105℃~115℃、七区95℃~105℃、八区85℃~95℃、九区85℃~95℃;
所述双螺杆挤出机内的最佳温度为:一区130℃、二区130℃、三区130℃、四区125℃、五区115℃、六区110℃、七区100℃、八区90℃、九区90℃;
所述单螺杆挤出机内的温度为:一区85℃~95℃、二区95℃~105℃、三区105℃~115℃、机头温控130℃~150℃;
所述单螺杆挤出机内的最佳温度为:一区90℃、二区100℃、三区110℃、机头温控130℃;
所述双螺杆挤出机、单螺杆挤出机在首次生产时需将各区温度提高5℃~10℃,待单螺杆挤出机的机头有物料挤出后恢复为上述温度区间。
本发明通过在高混机混料时,预先加入PVC树脂高速搅拌,在树脂温度达到50℃~75℃时,添加增塑剂,由于PVC树脂温度越高,分子间间隙越大,从而有助于增塑剂吸收,再混合3分钟~4分钟后,确保PVC树脂充分吸收增塑剂,添加其余粉料,待料温达到105℃~115℃时,启动低速搅拌,高温下启动低速搅拌可防止物料塑化结块,待料温120℃~130℃时停止搅拌,此时物料已经假塑化完成,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒,其提前加热PVC树脂有利于PVC树脂对增速剂的吸收,解决了PVC树脂无法吸收大量增速剂的问题,同时后期采用低速搅拌的方法使物料在高混机内充分假塑化,同时克服了后期传统双螺杆挤出时塑化物料造成物料温度难以降低的缺陷,达到提高生产效率的目的。
具体实施方式
一种耐寒PVC电缆料的制造方法,高混机混料时,预先加入PVC树脂高速搅拌,高速搅拌具体是指转速在1100转/分钟~1300转/分钟;在PVC树脂温度达到50℃~75℃时,添加增塑剂,混合3分钟~4分钟后添加其余粉料,其余粉料包括碳酸钙、稳定剂、润滑剂;待料温达到105℃~115℃时,启动低速搅拌,低速搅拌具体是指转速在700转/分钟~900转/分钟;待料温到达120℃~130℃时停止搅拌,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒。
双螺杆挤出机内的温度为:一区125℃~135℃、二区125℃~135℃、三区125℃~135℃、四区120℃~130℃、五区110℃~120℃、六区105℃~115℃、七区95℃~105℃、八区85℃~95℃、九区85℃~95℃;
单螺杆挤出机内的温度为:一区85℃~95℃、二区95℃~105℃、三区105℃~115℃、机头温控130℃~150℃;
双螺杆挤出机、单螺杆挤出机在首次生产时需将各区温度提高5℃~10℃,待单螺杆挤出机的机头有物料挤出后恢复为上述温度区间。
本发明通过在高混机混料时,预先加入PVC树脂高速搅拌,在树脂温度达到50℃~75℃时,添加增塑剂,由于PVC树脂温度越高,分子间间隙越大,从而有助于增塑剂吸收,再混合3分钟~4分钟后,确保PVC树脂充分吸收增塑剂,添加其余粉料,待料温达到105℃~115℃时,启动低速搅拌,高温下启动低速搅拌可防止物料塑化结块,待料温120℃~130℃时停止搅拌,此时物料已经假塑化完成,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒,其提前加热PVC树脂有利于PVC树脂对增速剂的吸收,解决了PVC树脂无法吸收大量增速剂的问题,同时后期采用低速搅拌的方法使物料在高混机内充分假塑化,同时克服了后期传统双螺杆挤出时塑化物料造成物料温度难以降低的缺陷,达到提高生产效率的目的。
具体实施例一:高混机混料时,预先加入PVC树脂高速搅拌,高速搅拌具体是指转速在1100转/分钟;在PVC树脂温度达到50℃时,添加增塑剂,混合3分钟后添加其余粉料,其余粉料包括碳酸钙、稳定剂、润滑剂;稳定剂为钙锌复合稳定剂,钙锌复合稳定剂包括硬脂酸钙、硬脂酸锌;润滑剂包括聚乙烯蜡、硬脂酸;待料温达到105℃时,启动低速搅拌,低速搅拌具体是指转速在700转/分钟;待料温到达120℃时停止搅拌,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒。
双螺杆挤出机内的温度为:一区125℃、二区125℃、三区125℃、四区120℃、五区110℃、六区105℃、七区95℃、八区85℃、九区85℃;单螺杆挤出机内的温度为:一区85℃、二区95℃、三区105℃、机头温控130℃;双螺杆挤出机、单螺杆挤出机在首次生产时需将各区温度提高5℃,待单螺杆挤出机的机头有物料挤出后恢复为上述温度区间。
具体实施例二:高混机混料时,预先加入PVC树脂高速搅拌,高速搅拌具体是指转速在1300转/分钟;在PVC树脂温度达到75℃时,添加增塑剂,混合4分钟后添加其余粉料,其余粉料包括碳酸钙、稳定剂、润滑剂;稳定剂为钙锌复合稳定剂,钙锌复合稳定剂包括硬脂酸钙、硬脂酸锌;润滑剂包括聚乙烯蜡、硬脂酸;待料温达到115℃时,启动低速搅拌,低速搅拌具体是指转速在900转/分钟;待料温到达130℃时停止搅拌,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒。
双螺杆挤出机内的温度为:一区135℃、二区135℃、三区135℃、四区130℃、五区120℃、六区115℃、七区105℃、八区95℃、九区95℃;单螺杆挤出机内的温度为:一区95℃、二区105℃、三区115℃、机头温控150℃;双螺杆挤出机、单螺杆挤出机在首次生产时需将各区温度提高10℃,待单螺杆挤出机的机头有物料挤出后恢复为上述温度区间。
具体实施例三:
高混机混料时,预先加入PVC树脂高速搅拌,高速搅拌具体是指转速在1200转/分钟;在PVC树脂温度达到62.5℃时,添加增塑剂,混合3.5分钟后添加其余粉料,其余粉料包括碳酸钙、稳定剂、润滑剂;稳定剂为钙锌复合稳定剂,钙锌复合稳定剂包括硬脂酸钙、硬脂酸锌;润滑剂包括聚乙烯蜡、硬脂酸;待料温达到110℃时,启动低速搅拌,低速搅拌具体是指转速在800转/分钟;待料温到达125℃时停止搅拌,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒。
双螺杆挤出机内的温度为:一区130℃、二区130℃、三区130℃、四区125℃、五区115℃、六区110℃、七区100℃、八区90℃、九区90℃;单螺杆挤出机内的温度为:一区90℃、二区100℃、三区110℃、机头温控140℃;双螺杆挤出机、单螺杆挤出机在首次生产时需将各区温度提高8℃,待单螺杆挤出机的机头有物料挤出后恢复为上述温度区间。
对于本领域的普通技术人员而言,应当理解可以在不脱离本发明公开的范围以内,可以采用等同替换或等效变换形式实施上述实施例。本发明的保护范围并不限于具体实施方式部分的具体实施例,只要没有脱离发明实质的实施方式,均应理解为落在了本发明要求的保护范围之内。
Claims (8)
1.一种耐寒PVC电缆料的制造方法,其特征在于:高混机混料时,预先加入PVC树脂高速搅拌,在PVC树脂温度达到50℃~75℃时,添加增塑剂,混合3分钟~4分钟后添加其余粉料,待料温达到105℃~115℃时,高温下启动低速搅拌,待料温到达120℃~130℃时停止搅拌,之后通过双螺杆挤出机挤出,双螺杆挤出机的出口连接单螺杆挤出机的入口,最后经单螺杆挤出机挤出造粒,高混机混料时的高速搅拌具体是指转速在1100转/分钟~1300转/分钟;高混机混料时的低速搅拌具体是指转速在700转/分钟~900转/分钟。
2.如权利要求1所述的一种耐寒PVC电缆料的制造方法,其特征在于:所述其余粉料包括碳酸钙、稳定剂、润滑剂。
3.如权利要求2所述的一种耐寒PVC电缆料的制造方法,其特征在于:所述稳定剂为钙锌复合稳定剂,钙锌复合稳定剂包括硬脂酸钙、硬脂酸锌;所述润滑剂包括聚乙烯蜡、硬脂酸。
4.如权利要求1所述的一种耐寒PVC电缆料的制造方法,其特征在于:所述双螺杆挤出机内的温度为:一区125℃~135℃、二区125℃~135℃、三区125℃~135℃、四区120℃~130℃、五区110℃~120℃、六区105℃~115℃、七区95℃~105℃、八区85℃~95℃、九区85℃~95℃。
5.如权利要求4所述的一种耐寒PVC电缆料的制造方法,其特征在于:所述双螺杆挤出机内的最佳温度为:一区130℃、二区130℃、三区130℃、四区125℃、五区115℃、六区110℃、七区100℃、八区90℃、九区90℃。
6.如权利要求4所述的一种耐寒PVC电缆料的制造方法,其特征在于:所述单螺杆挤出机内的温度为:一区85℃~95℃、二区95℃~105℃、三区105℃~115℃、机头温控130℃~150℃。
7.如权利要求6所述的一种耐寒PVC电缆料的制造方法,其特征在于:所述单螺杆挤出机内的最佳温度为:一区90℃、二区100℃、三区110℃、机头温控130℃。
8.如权利要求6所述的一种耐寒PVC电缆料的制造方法,其特征在于:所述双螺杆挤出机、单螺杆挤出机在首次生产时需将各区温度提高5℃~10℃,待单螺杆挤出机的机头有物料挤出后恢复为上述温度区间。
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