CN111283984A - 一种吹瓶机拉伸杆结构 - Google Patents
一种吹瓶机拉伸杆结构 Download PDFInfo
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- CN111283984A CN111283984A CN202010311518.2A CN202010311518A CN111283984A CN 111283984 A CN111283984 A CN 111283984A CN 202010311518 A CN202010311518 A CN 202010311518A CN 111283984 A CN111283984 A CN 111283984A
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- 238000007664 blowing Methods 0.000 title claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 32
- 239000004033 plastic Substances 0.000 claims abstract description 11
- 229920003023 plastic Polymers 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000037303 wrinkles Effects 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 238000009434 installation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229920001903 high density polyethylene Polymers 0.000 description 3
- 239000004700 high-density polyethylene Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
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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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/12—Stretching rods
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/12—Stretching rods
- B29C49/121—Stretching rod configuration, e.g. geometry; Stretching rod material
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/08—Biaxial stretching during blow-moulding
- B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
- B29C49/12—Stretching rods
- B29C49/121—Stretching rod configuration, e.g. geometry; Stretching rod material
- B29C49/1216—Material for stretching rods or parts thereof, e.g. heat insulating material
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
Abstract
一种吹瓶机拉伸杆结构,拉伸杆伸入瓶胚内的一端向内设置为阶梯状,且其上套有隔热套管,隔热套管由塑料制作而成并具有导热性差、耐磨强度高等特性。通过隔热套管的材质特性有效降低拉伸杆与瓶胚之间的导热性能,从而避免瓶胚产生较大的局部降温而形成褶皱,保证瓶胚吹制后的容器瓶质量。该吹瓶机拉伸杆结构较为简单,但却巧妙地避免了容器瓶产生褶皱,提高了PET容器瓶的吹制质量和生产稳定性。
Description
技术领域
本发明涉及吹瓶设备,特别是涉及一种吹瓶机中用于吹制瓶胚的拉伸杆结构。
背景技术
塑料容器瓶是人们日常生活中经常用到的器具,其一般由瓶胚经吹瓶机吹制而成。常见的容器瓶可以分为带把手和不带把手两类,而带有把手的容器瓶又分为两种,一种是在塑料瓶吹制完成后再安装把手的后置把手瓶,另一种是在吹制过程中就放入把手而将两者吹制为一体的自带把手瓶,前一种瓶通常采用PET(聚对苯二甲酸乙二醇酯)材质制作,后一种瓶则使用HDPE(高密度聚乙烯)材质制作。
带把手的瓶胚如图1所示,把手102的两端连接于瓶胚101的瓶口与瓶身中段之间。HDPE材质的自带把手容器瓶在吹制过程中存在密封不完全、瓶身容易破损和瓶子容量难以控制等缺陷;而PET材质后置把手容器瓶虽然相对具有较好的密封性、结实度和透明易观测等优点,但其把手的安装需要特定的设备生产和安装,且安装后容易脱落。这使得生产企业希望能够综合两者的优点,用PET材质制作自带把手式的容器瓶。但在PET吹瓶机的工作过程中,由于把手是已经制作好的而并不会参与吹制,故而必须要在瓶胚加温过程中对把手部位进行冷却处理,防止把手因高温而变形。但这又可能会使瓶胚加温后产生弯曲,如图2所示。
在吹瓶机的生产过程中,瓶胚在加热后会送入模具内,待模具闭合后再将拉伸杆从胚口插入瓶胚内从而对瓶胚进行纵向的拉伸,同时压缩空气也由胚口吹入瓶胚内对并胚进行横向拉伸,直至瓶胚涨大贴上模具内腔并冷却定型后完成吹制。但在吹制弯曲瓶胚时,钢材制作的拉伸杆201向下拉伸时会接触到弯曲瓶胚的内侧壁,如图3所示;由于钢材的导热性能较高,这会导致瓶胚与拉伸杆接触的部位产生较大的降温,PET瓶胚的该部位将会变硬、变韧,导致其横向拉伸时比相邻部位材料彭胀速度低于其它部位,最终因无法形成有效的膨胀而产生褶皱,如图4所示。
发明内容
本发明的目的在于提供一种结构简单且能够避免弯曲瓶胚吹制过程中产生褶皱的拉伸杆结构,以保证瓶胚吹制的质量。
本发明所述的吹瓶机拉伸杆结构,包括钢制的杆体,杆体伸入瓶胚内部一端的外壁上套有隔热套管,隔热套管由塑料制作而成。
本发明所述的吹瓶机拉伸杆结构,拉伸杆的主体一端连接吹瓶机的驱动机构,另一端抵于瓶胚内壁并对瓶胚施加作用力,在拉伸杆位于瓶胚内的一端处套上塑料制成的隔热套管,通过其材质特性有效降低拉伸杆与瓶胚之间的导热性能,从而避免瓶胚产生较大的局部降温而形成褶皱,保证瓶胚吹制后的容器瓶质量。该吹瓶机拉伸杆结构较为简单,但却巧妙地避免了容器瓶产生褶皱,提高了PET容器瓶的吹制质量和生产稳定性。
附图说明
图1是带把手瓶胚的结构示意图。
图2是弯曲瓶胚的结构示意图。
图3是现有吹瓶机拉伸杆工作状态示意图。
图4是容器瓶出现褶皱的示意图。
图5是本发明所述吹瓶机拉伸杆结构的结构示意图。
图6是图5所示吹瓶机拉伸杆结构的爆炸结构示意图。
图7是吹瓶机拉伸杆结构的工作状态示意图。
具体实施方式
一种吹瓶机拉伸杆结构,包括钢制的杆体1,杆体伸入瓶胚内部一端的外壁上套有隔热套管2,隔热套管由塑料制作而成。
如图5-7所示,拉伸杆的主体一端连接吹瓶机的驱动机构,另一端抵于瓶胚内壁并对瓶胚施加作用力,在拉伸杆位于瓶胚内的一端处套上塑料制成的隔热套管,通过其材质特性有效降低拉伸杆与瓶胚之间的导热性能,从而避免瓶胚产生较大的局部降温而形成褶皱,保证瓶胚吹制后的容器瓶质量。
所述的吹瓶机拉伸杆结构,杆体1端部的直径小于相邻部位,隔热套管2套于杆体的端部,且隔热套管的外径与杆体相邻部位的直径一致。隔热套管与杆体之间可以黏胶或热装配等方式进行连接固定。通过该种阶梯状结构杆体的设置,一方面可以使其套上隔热套管后的直径与现有技术一致,从而保证拉伸工作的稳定性和准确性,另一方面也有利于隔热套管的安装和提高隔热套管的安装结构强度。
隔热套管2的长度大于瓶胚与隔热套管接触部位至瓶胚胚口之间的距离,以保证钢制的杆体不会与瓶胚内壁接触,同时,隔热套管的长度稍大于瓶胚与隔热套管接触部位至瓶胚胚口之间的距离即可,如隔热套管2的一端接触瓶胚内壁而另一端位于瓶胚胚口之内,这可以使整个拉伸杆结构更加接近于普通全钢制拉伸杆,由此将塑料隔热套管可能造成的不良影响降至最低,更大程度上地保证生产质量。
隔热套管2可以选用导热性差且耐磨强度高的塑料制作而成,以提高其耐高温性能和使用寿命,也能避免其粘附瓶胚内壁而造成不良影响。
Claims (5)
1.一种吹瓶机拉伸杆结构,包括钢制的杆体(1),其特征在于:杆体伸入瓶胚内部一端的外壁上套有隔热套管(2),隔热套管由塑料制作而成。
2.根据权利要求1所述的吹瓶机拉伸杆结构,其特征在于:杆体(1)端部的直径小于相邻部位,隔热套管(2)套于杆体的端部,且隔热套管的外径与杆体相邻部位的直径一致。
3.根据权利要求1或2所述的吹瓶机拉伸杆结构,其特征在于:隔热套管(2)的长度大于瓶胚与隔热套管接触部位至瓶胚胚口之间的距离。
4.根据权利要求3所述的吹瓶机拉伸杆结构,其特征在于:隔热套管(2)的一端接触瓶胚内壁而另一端位于瓶胚胚口之内。
5.根据权利要求1或2所述的吹瓶机拉伸杆结构,其特征在于:隔热套管(2)由导热性差且耐磨强度高的塑料制作而成。。
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CN114536717A (zh) * | 2022-01-06 | 2022-05-27 | 全冠(福建)机械工业有限公司 | 一种新型偏心吹瓶机构 |
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KR20090073572A (ko) * | 2007-12-31 | 2009-07-03 | 주식회사 효성 | 2축연신 블로우 성형용 연신 로드 |
US20180186056A1 (en) * | 2014-09-25 | 2018-07-05 | Alpla Werke Alwin Lehner Gmbh & Co. Kg | Stretch blow molding process |
CN212266629U (zh) * | 2020-04-20 | 2021-01-01 | 广州达意隆包装机械股份有限公司 | 一种吹瓶机拉伸杆结构 |
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JPH0647269B2 (ja) * | 1989-08-31 | 1994-06-22 | 日精エー・エス・ビー機械株式会社 | 耐熱性中空容器の成形方法及びその装置 |
JP2876992B2 (ja) * | 1994-06-21 | 1999-03-31 | 東洋製罐株式会社 | 二軸延伸ブロー容器の製造方法 |
CN101164764B (zh) * | 2004-05-25 | 2012-01-11 | 株式会社开拓 | 带把手吹塑成形瓶及该瓶的制造装置 |
EP1688233A1 (en) * | 2005-02-04 | 2006-08-09 | The Procter & Gamble Company | Process for the manufacture of containers which have an integral handle, and containers manufactured thereby |
DE102008047891A1 (de) * | 2008-09-18 | 2010-03-25 | Krones Ag | Temperierte Reckstange |
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KR20090073572A (ko) * | 2007-12-31 | 2009-07-03 | 주식회사 효성 | 2축연신 블로우 성형용 연신 로드 |
US20180186056A1 (en) * | 2014-09-25 | 2018-07-05 | Alpla Werke Alwin Lehner Gmbh & Co. Kg | Stretch blow molding process |
CN212266629U (zh) * | 2020-04-20 | 2021-01-01 | 广州达意隆包装机械股份有限公司 | 一种吹瓶机拉伸杆结构 |
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CN114536717A (zh) * | 2022-01-06 | 2022-05-27 | 全冠(福建)机械工业有限公司 | 一种新型偏心吹瓶机构 |
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