CN104608362B - 塑料挤出机机筒 - Google Patents

塑料挤出机机筒 Download PDF

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CN104608362B
CN104608362B CN201510029757.8A CN201510029757A CN104608362B CN 104608362 B CN104608362 B CN 104608362B CN 201510029757 A CN201510029757 A CN 201510029757A CN 104608362 B CN104608362 B CN 104608362B
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feeding section
cylinder
plastic extruder
ladder
inwall
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CN104608362A (zh
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卢丽
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Guangxi Qinbao Network Technology Co., Ltd
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卢丽
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/68—Barrels or cylinders
    • B29C48/685—Barrels or cylinders characterised by their inner surfaces, e.g. having grooves, projections or threads

Abstract

本发明公开了一种塑料挤出机机筒，涉及塑料挤出机技术领域，它包括筒体，所述筒体具有加料段、塑化段和均化段，所述筒体的加料段内壁具有沿轴向设置的阶梯，所述加料段的内径朝所述均化段方向递减。本发明相比较于现有技术，在机筒的加料段加大物料和筒体之间的摩擦力，增加进料压力，以提高生产效率，提高熔体流动稳定性和压力稳定性。

Description

塑料挤出机机筒
技术领域
本发明涉及塑料挤出机技术领域，尤其是一种塑料挤出机机筒。
背景技术
塑料挤出成型主要采用塑料挤出机，机筒是塑料挤出机的重要部件，它通常是内表面光滑的圆柱筒体，物料在机筒内完成输送、压实、塑化和注射的过程，物料在进行上述形态变化的过程中，是通过机筒内壁和螺杆表面的摩擦作用向前输送的。现有的机筒由于内表面光滑，其摩擦力较小，螺杆转动时带动物料向前产生的轴向滑移小，即物料向前输送的速率低，降低了生产效率。
发明内容
本发明的目的是提供一种塑料挤出机机筒，这种机筒可以解决塑料挤出机机筒存在降低生产效率的问题。
为了解决上述问题，本发明采用的技术方案是：这种塑料挤出机机筒包括筒体，所述筒体具有加料段、塑化段和均化段，所述筒体的加料段内壁具有沿轴向设置的阶梯，所述加料段的内径朝所述均化段方向递减。
上述塑料挤出机机筒的技术方案中，更具体的技术方案还可以是：各所述阶梯之间通过斜面衔接。
进一步的，所述加料段内壁设置有半球状凸点。
进一步的，所述加料段具有通过螺栓连接固定在所述筒体内的套体，所述阶梯设置于所述套体的内壁。
由于采用了上述技术方案，本发明与现有技术相比具有如下有益效果：
1、在加料段设置阶梯，可加大物料和筒体之间的摩擦力，以在螺杆转动时，提高物料的轴向输送速度，从而提高生产效率。
2、加料段的内径朝均段方向递减，能增加进料压力，提高熔体流动稳定性和压力稳定性。
3、设置套体，便于更换和维修，降低成本。
附图说明
图1是本塑料挤出机机筒的结构示意图。
具体实施方式
下面结合附图实施例对本发明作进一步详述：
图1所示的塑料挤出机机筒包括筒体1，筒体1具有加料段1-1、塑化段1-2和均化段1-3，加料段1-1具有装入筒体1内的套体2，筒体1内设置限制和定位套体2的台肩，套体2通过多个螺栓连接固定于筒体1内；套体2的内壁具有沿轴向设置的阶梯，各级阶梯的内径朝均化段1-3方向递减，最末一级阶梯的内径与筒体1塑化段1-2的内径相同，各阶梯之间通过斜面衔接，以避免卡阻；套体2的内壁还分布有多个半球状凸点3。
工作时，物料从筒体1上方的料斗进入加料段1-1的螺杆的螺槽内，当螺杆转动时，由于加料段1-1套体2的阶梯和半球状凸点3的存在，使得套体2内表面的摩擦力大于螺杆表面摩擦力，从而使螺槽内的物料转速小于螺杆的转速，减小物料随杆的转动，增大物料的轴向滑移，从而提高生产效率。

Claims (3)

1.一种塑料挤出机机筒，包括筒体，所述筒体具有加料段、塑化段和均化段，其特征在于：所述筒体的加料段内壁具有沿轴向设置的阶梯，所述加料段的内径朝所述均化段方向递减；所述加料段内壁设置有半球状凸点。
2.根据权利要求1所述的塑料挤出机机筒，其特征在于：各所述阶梯之间通过斜面衔接。
3.根据权利要求1或2所述的塑料挤出机机筒，其特征在于：所述加料段具有通过螺栓连接固定在所述筒体内的套体，所述阶梯设置于所述套体的内壁。
CN201510029757.8A 2015-01-21 2015-01-21 塑料挤出机机筒 Active CN104608362B (zh)

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Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN111923371B (zh) * 2020-07-15 2022-06-14 四川大学 一种超高分子量聚乙烯用单螺杆挤出机机筒结构

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850415A (en) * 1972-03-25 1974-11-26 G Hansen Screw extruder for synthetic plastics material
CN103252885A (zh) * 2012-02-16 2013-08-21 北京化工大学 一种基于径向熔融的沟槽机筒挤出机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5352539A (en) * 1992-10-27 1994-10-04 Friedrich Theysohn Gmbh Extruder housing for double-screw extruder having an annularly stepped internal bore covered by a hot isostatically-pressed structure, and method of making same
JP2569300B2 (ja) * 1994-03-28 1997-01-08 株式会社御池鐵工所 廃プラスチック材を含む廃棄物の減容固形化装置
CN102248655A (zh) * 2011-06-10 2011-11-23 北京化工大学 锥形行星螺杆挤出机
CN202114908U (zh) * 2011-06-10 2012-01-18 北京化工大学 加料段机筒开螺旋槽的锥形挤出机
CN102785345A (zh) * 2012-08-22 2012-11-21 张家港市穗通机械有限公司 机筒

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850415A (en) * 1972-03-25 1974-11-26 G Hansen Screw extruder for synthetic plastics material
CN103252885A (zh) * 2012-02-16 2013-08-21 北京化工大学 一种基于径向熔融的沟槽机筒挤出机

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