CN1961786A - 瓦楞纸杯及其制作方法 - Google Patents

瓦楞纸杯及其制作方法 Download PDF

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CN1961786A
CN1961786A CNA2006101549628A CN200610154962A CN1961786A CN 1961786 A CN1961786 A CN 1961786A CN A2006101549628 A CNA2006101549628 A CN A2006101549628A CN 200610154962 A CN200610154962 A CN 200610154962A CN 1961786 A CN1961786 A CN 1961786A
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林泠镪
林刚
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    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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    • B31B2105/002—Making boxes characterised by the shape of the blanks from which they are formed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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    • B31B2120/70—Construction of rigid or semi-rigid containers having corrugated or pleated walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
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Abstract

涉及饮用器具领域的瓦楞纸杯，是针对公知的纸杯不耐烫，受热时杯体刚性不佳而设计的。这种瓦楞纸杯包括杯身、杯底和杯套，要点是在杯身外套有杯套，此杯套是瓦楞纸杯套，其楞条呈横行排列，或在横行排列的楞条上设有凹槽。制作流程分纸杯制作、瓦楞纸杯套扇形片二个分工序和套杯一个总工序进行；瓦楞纸杯套扇形片经套杯机模具卷合成型、接口由超声波产生的瞬间热量烫合成为瓦楞纸杯套，内壁涂胶后与纸杯套合。本发明解决了同类产品外形单一，具体方案欠之的技术问题。所制成的瓦楞纸杯刚度适宜，又能防烫，有较高的保温性能，其杯口易于杯盖相匹配；外形美观，手感良好。适应于批量生产，经济效益提高，外贸前景看好。

Description

瓦楞纸杯及其制作方法
技术领域
本发明涉及饮用器具领域，是将呈扇形的瓦楞纸片经套杯机加工成型的一种瓦楞纸杯及其制作方法。
背景技术
目前，纸杯作为一次性饮水杯已普及至办公场所、娱乐场所、家庭。纸杯被消费者普遍认可的原因在于使用方便、卫生和价格适中。但普通纸杯存在保温性能和防烫隔热性能差，受热后易变形等缺点，而使用杯托来解决这些问题，会给使用者带来不便。针对普通纸杯的这些问题，纸杯制造商已研发出通过在普通纸杯外加套一层或多层瓦楞杯套的瓦楞纸杯，实现了纸杯的保温、防烫隔热效果。中国专利文献刊载的ZL专利号02248697.6，公开了授权公告号CN 2580858Y，“一种纸杯”。它仅仅披露了在杯壁上装有隔离纸，隔离纸上分布有点状或条状的凸起，但尚未公开具体技术及实施方案，属公开不充分的一种纸杯。
发明内容
本发明将克服公知纸杯技术及实施方案不足，向本领域提供一种瓦楞纸杯及其制作方法，使其能解决上述存在的技术问题。本发明的目的是通过如下的技术方案来实现的。
一种瓦楞纸杯，该纸杯包括杯身、杯底、杯套，其特征是在杯身外套有杯套，此杯套是瓦楞纸杯套，其楞条呈横行排列的。
所述的瓦楞纸杯的瓦楞纸杯套的横行楞条上并在楞条上设有凹槽。
所述的瓦楞纸杯的瓦楞纸杯套的横行楞条或设为竖行，并在竖行楞条上设有凹槽。
所述的瓦楞纸杯的瓦楞纸杯套横行楞条、竖行楞条是带有与杯底平面呈一定的倾斜度。
所述的瓦楞纸杯的杯套由瓦楞扇形片卷合成型的。
所述的瓦楞纸杯的瓦楞面纸与杯身之间设有衬纸。
所述的瓦楞纸杯套横行的楞条、竖行的楞条的条数是根据杯身的规格而定。图1至图3省略横行的楞条或在竖行的楞条条数的绘制，特加之说明。图7将在实施方案中加之较为详细的描述。
本发明解决了同类产品外形单一，具体方案欠缺的技术问题。所制成的瓦楞纸杯刚度适宜，又能防烫，有较高的保温性能，其杯口易与杯盖相匹配；外形美观，手感良好。适应于批量生产，经济效益提高，外贸前景看好。
附图说明
图1是横行的楞条的瓦楞纸杯套结构示意图，图中作了A--A剖视。
图2是设有凹槽横行的楞条的瓦楞纸杯套结构示意图，图中作了B--B剖视。
图3是竖行的楞条的瓦楞纸杯套结构示意图。
图4是图1的A--A旋转剖视，局部放大示意图。
图5是图2的B--B旋转剖视，局部放大示意图。
图6是瓦楞扇形片示意图。
图7是本发明实施方案示意图。
以上附图的序号及名称：1、杯身，2、杯套，3、杯底，4、楞条，5、凹槽，6、衬纸，7、瓦楞面纸，8、瓦楞杯套扇形片。
具体实施方式
实施方式以瓦楞纸杯制作流程为例。制作流程开始→先分两个分工序进行，再合成一个总工序：分工序一是纸杯的制作，二是瓦楞扇形片的制作，总工序是套杯。
纸杯的制作分工序：纸杯纸→模切→模切成杯身扇形片→在纸杯成型机与杯底纸成型→纸杯(待套杯)；
瓦楞杯套扇形片的制作分工序：杯套面纸→印刷(如果是不带图案或色彩的，则不需此道工序)→杯套印刷面纸→压瓦楞→杯套印刷瓦楞面纸→与衬纸→复合→杯套瓦楞纸板→在楞条上压制需要的图形(如需要)→模切→瓦楞杯套扇形片(待套杯)；
套杯总工序：瓦楞杯套扇形片→杯套卷合成型→超声波烫合接口→杯套内壁涂胶→杯套与纸杯套合→工序结束，瓦楞纸杯就制作完成。

Claims (7)

1、一种瓦楞纸杯，该纸杯包括杯身(1)、杯底(2)、杯套(3)，其特征是在杯身(1)外套有杯套，此杯套是瓦楞纸杯套，其楞条(4)呈横行排列的。
2、如权利要求1所述的瓦楞纸杯，其特征是所述的瓦楞纸杯套的横行楞条(4)上并在楞条上设有凹槽(5)。
3、如权利要求1所述的瓦楞纸杯，其特征是所述的瓦楞纸杯套的横行楞条(4)或设为竖行，并在竖行楞条上设有凹槽(5)。
4、如权利要求1所述的瓦楞纸杯，其特征是所述的瓦楞纸杯套横行楞条(4)、竖行楞条是带有与杯底平面呈一定的倾斜度。
5、如权利要求1所述的瓦楞纸杯，其特征是杯套(3)由瓦楞扇形片(8)卷合成型的。
6、如权利要求5所述的瓦楞纸杯，其特征是瓦楞面纸(7)与杯身(1)之间设有衬纸(6)。
7、瓦楞纸杯的制作方法，该方法特征在于制作流程：制作流程开始→先分两个分工序进行，再合成一个总工序：分工序一是纸杯的制作，二是瓦楞扇形片的制作，总工序是套杯；纸杯的制作分工序：纸杯纸→模切→模切成杯身扇形片→在纸杯成型机与杯底纸成型→纸杯，待套杯；瓦楞杯套扇形片的制作分工序：杯套面纸→印刷，如不带图案或色彩，则不需此道工序→杯套印刷面纸→压瓦楞→杯套印刷瓦楞面纸→与衬纸→复合→杯套瓦楞纸板→在楞条上压制需要的图形，如不需压制图形，则不需此道工序→模切→瓦楞杯套扇形片，待套杯；套杯总工序：瓦楞杯套扇形片→杯套卷合成型→超声波烫合接口→杯套内壁涂胶→杯套与纸杯套合→工序结束，瓦楞纸杯就制作完成。
CNA2006101549628A 2006-12-01 2006-12-01 瓦楞纸杯及其制作方法 Pending CN1961786A (zh)

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WO2010130070A1 (zh) * 2009-05-12 2010-11-18 伟盟工业股份有限公司 纸杯与杯套
CN101889806A (zh) * 2010-07-07 2010-11-24 李海兵 一种瓦楞隔热纸杯及制作该种纸杯的纸杯成型机
CN102210540A (zh) * 2011-03-09 2011-10-12 上海鑫域纸杯有限公司 一种防滑防烫纸杯及制造工艺
CN102463707A (zh) * 2010-11-17 2012-05-23 胜腾实业股份有限公司 纸材杯身之成型模具
WO2012119482A1 (zh) * 2011-03-09 2012-09-13 上海鑫域纸杯有限公司 一种纸杯及其制造工艺
CN103932561A (zh) * 2014-04-03 2014-07-23 安徽省嘉信包装印务有限公司 一种瓦楞纸杯托
CN104553071A (zh) * 2013-10-12 2015-04-29 禾丰环保科技有限公司 纸杯的成型方法及其杯身结构
CN104873057A (zh) * 2015-04-11 2015-09-02 林勇 一种新型瓦楞杯
CN106273663A (zh) * 2016-08-25 2017-01-04 浙江至优环保科技有限公司 纸杯生产工艺
CN107187689A (zh) * 2017-06-28 2017-09-22 重庆泰宝纸制品有限公司 生物可降解涂层纸杯及其生产方法
CN107323787A (zh) * 2017-08-18 2017-11-07 合肥远传纸制品有限公司 一种单瓦纸杯及其制作工艺
CN107343726A (zh) * 2017-01-04 2017-11-14 农立艳 杯身外表增设瓦楞纹的防烫纸制饮水杯
WO2017219956A1 (zh) * 2016-06-21 2017-12-28 丁椒平 一种纸杯及其加工工艺
CN108582862A (zh) * 2018-05-23 2018-09-28 浙江庞度环保科技有限公司 瓦楞纸杯机
CN108749129A (zh) * 2018-05-23 2018-11-06 浙江庞度环保科技有限公司 瓦楞纸杯机的印刷压纹装置
CN109677001A (zh) * 2018-12-28 2019-04-26 重庆嘉海纸制品有限公司 一种纸杯杯身切割放置活动框

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CN103584624A (zh) * 2013-10-17 2014-02-19 吴江市恒赢蔺草刺绣工艺制品厂 一种组合杯

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US5839653A (en) * 1996-07-12 1998-11-24 Zadravetz; Robert B. Container with corrugated wall
JP3005862B1 (ja) * 1998-11-17 2000-02-07 禎美 伊藤 紙製断熱容器とその製造方法
JP2000168762A (ja) * 1998-12-10 2000-06-20 Sadami Ito 紙製断熱容器
CN2638583Y (zh) * 2003-08-09 2004-09-08 蔡桂平 支撑型防烫纸碗(杯)

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WO2010130070A1 (zh) * 2009-05-12 2010-11-18 伟盟工业股份有限公司 纸杯与杯套
CN101889806A (zh) * 2010-07-07 2010-11-24 李海兵 一种瓦楞隔热纸杯及制作该种纸杯的纸杯成型机
CN101889806B (zh) * 2010-07-07 2012-04-18 浙江新立机械有限公司 一种制作瓦楞隔热纸杯的纸杯成型机
CN102463707A (zh) * 2010-11-17 2012-05-23 胜腾实业股份有限公司 纸材杯身之成型模具
CN102463707B (zh) * 2010-11-17 2013-05-01 胜腾实业股份有限公司 纸材杯身之成型模具
US9162790B2 (en) 2011-03-09 2015-10-20 Shanghai Xinyu Paper Cup Co., Ltd. Method for preparing paper cup
CN102210540A (zh) * 2011-03-09 2011-10-12 上海鑫域纸杯有限公司 一种防滑防烫纸杯及制造工艺
WO2012119482A1 (zh) * 2011-03-09 2012-09-13 上海鑫域纸杯有限公司 一种纸杯及其制造工艺
CN102210540B (zh) * 2011-03-09 2013-11-13 上海鑫域纸杯有限公司 一种防滑防烫纸杯的制造工艺
CN104553071A (zh) * 2013-10-12 2015-04-29 禾丰环保科技有限公司 纸杯的成型方法及其杯身结构
CN103932561A (zh) * 2014-04-03 2014-07-23 安徽省嘉信包装印务有限公司 一种瓦楞纸杯托
CN104873057A (zh) * 2015-04-11 2015-09-02 林勇 一种新型瓦楞杯
WO2017219956A1 (zh) * 2016-06-21 2017-12-28 丁椒平 一种纸杯及其加工工艺
US10493735B2 (en) 2016-06-21 2019-12-03 Jiaoping Ding Paper cup and its manufacturing process
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CN106273663A (zh) * 2016-08-25 2017-01-04 浙江至优环保科技有限公司 纸杯生产工艺
CN107343726A (zh) * 2017-01-04 2017-11-14 农立艳 杯身外表增设瓦楞纹的防烫纸制饮水杯
CN107187689A (zh) * 2017-06-28 2017-09-22 重庆泰宝纸制品有限公司 生物可降解涂层纸杯及其生产方法
CN107323787A (zh) * 2017-08-18 2017-11-07 合肥远传纸制品有限公司 一种单瓦纸杯及其制作工艺
CN108582862A (zh) * 2018-05-23 2018-09-28 浙江庞度环保科技有限公司 瓦楞纸杯机
CN108749129A (zh) * 2018-05-23 2018-11-06 浙江庞度环保科技有限公司 瓦楞纸杯机的印刷压纹装置
CN109677001A (zh) * 2018-12-28 2019-04-26 重庆嘉海纸制品有限公司 一种纸杯杯身切割放置活动框

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