WO2024065084A1 - 可制作不同厚度的纸塑产品成型工艺 - Google Patents

可制作不同厚度的纸塑产品成型工艺 Download PDF

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Publication number
WO2024065084A1
WO2024065084A1 PCT/CN2022/121303 CN2022121303W WO2024065084A1 WO 2024065084 A1 WO2024065084 A1 WO 2024065084A1 CN 2022121303 W CN2022121303 W CN 2022121303W WO 2024065084 A1 WO2024065084 A1 WO 2024065084A1
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WIPO (PCT)
Prior art keywords
wet embryo
paper
mold
pulp
different thicknesses
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PCT/CN2022/121303
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English (en)
French (fr)
Inventor
赖宗伸
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常州市诚鑫环保科技有限公司
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Application filed by 常州市诚鑫环保科技有限公司 filed Critical 常州市诚鑫环保科技有限公司
Priority to PCT/CN2022/121303 priority Critical patent/WO2024065084A1/zh
Publication of WO2024065084A1 publication Critical patent/WO2024065084A1/zh

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Classifications

    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J3/00—Manufacture of articles by pressing wet fibre pulp, or papier-mâché, between moulds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds

Definitions

  • the present invention is a molding process for producing paper-plastic products of different thicknesses, and in particular refers to a process technology for molding paper-plastic products of different thicknesses by using a programmable logic controller to control a mold driving device of a molding machine, so as to generate a difference in slurry absorption time period, control the rising speed of the mold from a slurry tank, control the difference in mold inclination angle, etc., thereby molding the same wet embryo with different thicknesses of paper-plastic products.
  • the invention provides a forming process for producing paper-plastic products with different thicknesses.
  • the invention provides a molding process for producing paper plastic products with different thicknesses.
  • the process uses a programmable logic controller to control a mold driving device so that a time difference of slurry absorption is generated, thereby forming wet embryos with different thicknesses, or controls the rising speed of the mold away from a slurry tank to produce wet embryos with different thicknesses, or controls the angle difference of a turning molding machine to achieve different thicknesses of the same wet embryo in different areas. That is, different types of molding machines and programmable logic controllers that can control time and angle can be used to achieve different thicknesses of the same wet embryo in different areas or local parts.
  • the paper-plastic forming machine is a reciprocating forming machine or a turnover forming machine.
  • the process means is: when the molding machine drives the mold to absorb the slurry and forms a wet embryo, the programmable logic controller controls the mold to rise slowly and gradually, so that the wet embryo that leaves the pulp tank first is still maintained in a shape close to the mold by vacuum suction, and the wet embryo that leaves the pulp tank first maintains the original thickness shape, while the wet embryo part that has not yet left the pulp tank continues to be subject to vacuum suction and continues to absorb plant fiber pulp until a preset time, and when the slurry absorption action is completed, the wet embryo part that leaves the pulp tank first is thinner in thickness, and the wet embryo part that leaves the pulp tank latest is thicker in thickness, and the plant fibers are interwoven and superimposed to make the thicker part obtain a thicker fiber thickness, and after hot pressing, the wet embryo is formed into different thickness states from the thinnest to the thickest from top to bottom, and the strength of the thicker part is improved, so that a paper-plastic product with stronger shaping force is obtained, which is applied to
  • the process means is: when the molding machine drives the mold to absorb the slurry and forms a wet embryo, the programmable logic controller lifts the mold to a preset distance and then stops rising, so that the wet embryo part that has not yet left the slurry tank continues to be subjected to vacuum suction to absorb the plant fiber pulp, and the interweaving and overlapping of plant fibers are utilized to make the thicker part obtain the preset fiber thickness.
  • the wet embryo is subjected to the clamping force of the upper and lower molds, so that the wet embryo becomes a state with two different thicknesses, thereby obtaining a high-strength and high-definition paper-plastic product, which is applied to paper-plastic cups, cup lids, egg trays, and industrial packaging boxes with a certain depth or height.
  • the process means is: when the flip forming machine drives the mold to absorb the slurry and forms a wet embryo, the programmable logic controller rotates the mold to the set angle, and the wet embryo part located in the pulp tank continues to absorb the plant fiber pulp under the vacuum suction force, so that the wet embryo part that needs to be thickened continues to absorb the plant fiber pulp in the pulp tank, and the interweaving and overlapping of plant fibers are utilized to make the thicker part obtain a thicker fiber thickness. Subsequently, the wet embryo is formed by hot pressing, so that the wet embryo becomes a finished product with different thicknesses in local areas such as thicker parts and thinner parts. The finished product after hot pressing has more stable high strength and high shaping in the thicker part, and can be applied to industrial packaging boxes or paper-plastic products that need to strengthen the strength of a certain part.
  • the present invention can use different types of molding machines and programmable logic controllers that can control time and angle to achieve different thicknesses in different areas or local parts of the same wet embryo without additionally modifying the mechanism of the molding machine.
  • FIG1 is a cross-sectional view of the slurry suction of the first process of the present invention.
  • FIG. 2 is a schematic diagram of different thicknesses of wet paper-plastic embryos in the first process of the present invention.
  • FIG3 is a cross-sectional view of the slurry absorption of the second process of the present invention.
  • FIG. 4 is a schematic diagram of different thicknesses of wet paper-plastic embryos in the second process of the present invention.
  • FIG5 is a cross-sectional view of the front-stage slurry absorption of the third process of the present invention.
  • FIG6 is a cross-sectional view of the rear stage slurry absorption of the third process of the present invention.
  • FIG. 7 is a schematic diagram of different thicknesses of wet paper-plastic embryos in the third process of the present invention.
  • the present invention provides a forming process for producing paper-plastic products of different thicknesses, which mainly utilizes the slurry absorption method of a paper-plastic forming machine and controls the time difference of a slurry-absorbing mold 1 staying in a slurry tank 30 to absorb the plant fiber pulp 3 arranged therein, the rising speed of the mold 1 leaving the slurry tank 30 when absorbing the slurry, the inclination angle difference of the mold 1, and other slurry absorption methods by a programmable logic controller (PLC).
  • PLC programmable logic controller
  • the paper-plastic forming machine can be a reciprocating forming machine, a turnover forming machine, or other types of forming machines commonly used in the paper-plastic industry, and the interweaving and superposition of plant fibers is utilized to achieve the purpose of producing different thicknesses of the same wet embryo 2 in different areas or different parts.
  • the first process means of the present invention is: when the molding machine drives the mold 1 to complete the slurry absorption and form a wet embryo 2, the programmable logic controller controls the mold 1 to rise slowly and gradually, so that the wet embryo 2 that first leaves the slurry tank 30 is still maintained in a shape close to the mold 1 by the vacuum suction 10, and the wet embryo 2 that first leaves the slurry tank 30 maintains the original thickness shape, and the wet embryo 2 that has not yet left the slurry tank 30 continues to be subjected to the vacuum suction 10 and continues to absorb the plant fiber pulp 3 until the preset time, and when the slurry absorption action is completed, The portion of the wet embryo 2 that leaves the slurry tank 30 first is of thinner thickness A, while the portion of the wet embryo 2 that leaves the slurry tank 30 last is of thicker thickness B.
  • the interweaving and overlapping of plant fibers are utilized to allow the portion of thicker thickness B to obtain thicker fiber thickness.
  • the wet embryo 2 is formed into different thickness states from the thinnest to the thickest from top to bottom.
  • the strength of the portion of thicker thickness B is improved, so that a paper-plastic product with stronger shaping force is obtained.
  • the paper-plastic product can be applied to cup bodies, higher and deeper products, or paper-plastic products that require stronger shaping force at one end, as shown in FIG. 2 .
  • the second process means of the present invention is: when the molding machine drives the mold 1 to complete the slurry absorption and form a wet embryo 2, the programmable logic controller is controlled to lift the mold 1 to a preset distance and then pause to make the wet embryo 2 that has not yet left the slurry tank 30 continue to be subjected to the vacuum suction 10 to absorb the plant fiber pulp 3.
  • the thicker thickness B can obtain the preset fiber thickness.
  • the wet embryo 2 is subjected to the clamping force of the upper and lower molds, so that the wet embryo 2 becomes a state with two different thicknesses, thereby obtaining a high-strength and high-definition paper-plastic product, which can be applied to various paper-plastic products with a certain depth or height, such as paper-plastic cup bodies, cup lids, egg trays, industrial packaging boxes, etc.
  • the third process means of the present invention is: when the flip molding machine drives a mold 4 to absorb slurry and forms a wet embryo 5, the programmable logic controller rotates the mold 4 to a set angle, and the wet embryo 5 part located in the pulp tank 30 is still continuously subjected to the vacuum suction 40 to absorb the plant fiber pulp 3, so that the wet embryo 5 part that needs to be thickened continues to absorb the plant fiber pulp 3 in the pulp tank 30, and the plant fibers are interwoven and superimposed, so that the thicker thickness B part can obtain a thicker fiber thickness, and then the wet embryo 5 is hot-pressed to be formed, so that the wet embryo 5 becomes a finished product with different thicknesses in local areas such as a thicker thickness B part and a thinner thickness A part.
  • the finished product after hot-pressing has more stable high strength and high shaping in the thicker thickness B part, and can be applied to industrial packaging boxes or paper
  • the present invention has the following advantages.
  • the mold 1 does not need to be changed or modified.
  • the thicker thickness B part is only pressed more firmly when the upper and lower molds are closed, and no difference can be seen from the appearance, so that the thicker thickness B part of the product has higher strength and shaping force.
  • a programmable logic controller can be used to control a more accurate slurry absorption time to obtain the desired estimated thickness without the need for additional mold 1 adjustment or modification of the hardware structure.
  • the process of the present invention only requires the installation of a programmable logic controller directly on the paper-plastic molding machine to control the difference in the dwelling time period of the mold 1 for absorbing slurry, the rising speed of the mold 1 from the slurry tank 30 when absorbing slurry, the difference in the inclination angle of the mold 1, and other slurry absorption methods to achieve the desired wet embryo 2 of different thicknesses, without the need to modify the mechanism of the molding machine.

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  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
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  • Mechanical Engineering (AREA)
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Abstract

本发明为一种可制作不同厚度的纸塑产品成型工艺，其利用可编程逻辑控制器来控制模具驱动装置，使其产生吸浆时间段差，而能成型出不同厚度部位的湿胚，或控制模具脱离浆槽的上升速度，而产生不同厚薄度的湿胚，或控制翻转成型机的角度差来达成同一湿胚在不同区域的厚薄度不同，即是可以利用不同形式的成型机及可控制时间、角度的可编程逻辑控制器来达成同一湿胚在不同区域或局部部位具有不同的厚薄度。

Description

可制作不同厚度的纸塑产品成型工艺 技术领域
本发明为一种可制作不同厚度的纸塑产品成型工艺，尤指一种利用可编程逻辑控制器来控制成型机的模具驱动装置，使其产生吸浆时间段差、控制模具脱离浆槽的上升速度、控制模具倾斜角度差等方式，而能成型出同一湿胚具有不同厚薄度的纸塑成型工艺技术。
 背景技术
随着纸塑产品的应用范围越来越广，对于纸塑的要求也越来越高，每个纸塑业者朝着让纸塑产品替代塑料产品的研发上，力求纸塑杯子能像塑料杯一样能变形量更小、更不易软化；希望纸塑包装能承受更多重量、更厚实坚硬；然而目前受制于纸塑原料植物纤维特性的影响，很难令纸塑成品具有高强度和高定型力；仅能就模具的真空吸孔增加密度或排列方式来达到让纸塑湿胚吸附更多的植物纤维，然此方式需要经过多次的测试及修改才能达到预设的合理厚度和强度，实属不便；或是直接在吸浆模具的真空腔内分隔成数个不相通的区域，使需要加厚的区域内增加真空吸力，而令模具成本大幅提高且需要经过多次测试才能达到预设的厚度和强度。本发明人即是有鉴于习知纸塑产品成型工艺仍存有缺失，乃予以研发，经多次努力乃发展出本发明。
 技术问题
本发明提供一种可制作不同厚度的纸塑产品成型工艺。
 技术解决方案
本发明提供一种可制作不同厚度的纸塑产品成型工艺，其利用可编程逻辑控制器来控制模具驱动装置，使其产生吸浆时间段差，而能成型出不同厚度部位的湿胚，或控制模具脱离浆槽的上升速度，而产生不同厚薄度的湿胚，或控制翻转成型机的角度差来达成同一湿胚在不同区域的厚薄度不同，即是可以利用不同形式的成型机及可控制时间、角度的可编程逻辑控制器来达成同一湿胚在不同区域或局部部位具有不同的厚薄度为其目的。
进一步的，该纸塑成型机为一往复式成型机或一翻转式成型机。
进一步的，所述工艺手段为：当成型机驱动模具吸浆完成，而形成一湿胚后，令可编程逻辑控制器控制模具缓慢且渐进式地上升，使先脱离浆槽的湿胚依然受真空吸力维持紧贴模具的形态，其先脱离浆槽的湿胚维持原有的厚度形态，而尚未脱离浆槽的湿胚部位则继续受真空吸力，并持续吸附植物纤维纸浆直至预设的时间，而当完成吸浆动作后，最先脱离浆槽的湿胚部位为较薄厚度，而最迟离开浆槽的湿胚部位则为较厚厚度，利用植物纤维的相互交织叠加，而使较厚厚度的部位获得较厚的纤维厚度，并在热压成型后，使该湿胚形成由上往下为最薄至最厚的不同厚薄度状态，较厚厚度的部位强度提高，使得到定型力更强的纸塑产品，其应用于杯体、较高且较深的产品或某一端需要较强定型力的纸塑产品。
进一步的，所述工艺手段为：当成型机驱动模具吸浆完成，而形成一湿胚后，令可编程逻辑控制器提升模具至预设距离后暂停上升，使尚未脱离浆槽的湿胚部位持续受真空吸力吸附植物纤维纸浆，利用植物纤维的相互交织叠加，而使较厚厚度的部位得到预设的纤维厚度，在热压定型时该湿胚受到上、下模的合模力，而令湿胚成为具二种不同厚薄度的状态，从而得到高强度及高定型的纸塑产品，应用于具有一定深度或高度的纸塑杯体、杯盖、蛋托、工业包装盒。
进一步的，所述工艺手段为：当翻转式成型机驱动模具吸浆完成，而形成一湿胚后，令可编程逻辑控制器旋转模具至所设定的角度，在位于浆槽中的湿胚部位仍持续受真空吸力吸附植物纤维纸浆，使需要加厚的湿胚部位持续在浆槽内吸附植物纤维纸浆，利用植物纤维的相互交织叠加，而使较厚厚度的部位获得较厚的纤维厚度，随后该湿胚再经由热压定型，使该湿胚成为同时具备有较厚厚度的部位及较薄厚度的部位等局部区域厚薄度不同的成品，经由热压定型后的成品，于较厚厚度的部位更具有稳定的高强度及高定型，可应用于工业包装盒或需要某个部位加强强度的纸塑产品。
 有益效果
采用上述技术方案后，本发明可以利用不同形式的成型机及可控制时间、角度的可编程逻辑控制器来达成同一湿胚在不同区域或局部部位具有不同的厚薄度。不需额外修改成型机上的机构。
 附图说明
图1为本发明第一种工艺方式的吸浆剖面图。
图2为本发明第一种工艺方式的纸塑湿胚不同厚度示意图。
图3为本发明第二种工艺方式的吸浆剖面图。
图4为本发明第二种工艺方式的纸塑湿胚不同厚度示意图。
图5为本发明第三种工艺方式的前段吸浆剖面图。
图6为本发明第三种工艺方式的后段吸浆剖面图。
图7为本发明第三种工艺方式的纸塑湿胚不同厚度示意图。
符号说明：1...模具，10...真空吸力，2...湿胚，30...浆槽，3...植物纤维纸浆，A...较薄厚度，B...较厚厚度，4...模具，40...真空吸力，5...湿胚。
 本发明的实施方式
本发明提供一种可制作不同厚度的纸塑产品成型工艺，主要是利用纸塑成型机的吸浆方式并借由一可编程逻辑控制器控制吸浆的模具1停留在一浆槽30吸附其内部设置的植物纤维纸浆3的时间段差、模具1吸浆时脱离浆槽30的上升速度、模具1倾斜角度差等吸浆方式，该可编程逻辑控制器（programmable logic controller，简称PLC），其中纸塑成型机可以是纸塑行业常用的往复式成型机、翻转式成型机或是其他型式的成型机，并利用植物纤维的相互交织叠加来达成同一湿胚2在不同区域或不同部位产生不同的厚薄度为目的。
请参考图1及图2所示，本发明第一种工艺手段为：当成型机驱动模具1吸浆完成，而形成一湿胚2后，令可编程逻辑控制器控制模具1缓慢且渐进式地上升，使先脱离浆槽30的湿胚2依然受真空吸力10维持紧贴模具1的形态，其先脱离浆槽30的湿胚2维持原有的厚度形态，而尚未脱离浆槽30的湿胚2部位则继续受真空吸力10，并持续吸附植物纤维纸浆3直至预设的时间，而当完成吸浆动作后，最先脱离浆槽30的湿胚2部位为较薄厚度A，而最迟离开浆槽30的湿胚2部位则为较厚厚度B，利用植物纤维的相互交织叠加，而使较厚厚度B的部位可以获得较厚的纤维厚度，并在热压成型后，使该湿胚2形成由上往下为最薄至最厚的不同厚薄度状态，较厚厚度B的部位强度提高，使得到定型力更强的纸塑产品，其可以应用于杯体、较高且较深的产品或某一端需要较强定型力的纸塑产品，如图2所示。
请参阅图3及图4所示，本发明第二种工艺手段为：当成型机驱动模具1吸浆完成，而形成一湿胚2后，令可编程逻辑控制器提升模具1至预设距离后暂停上升，使尚未脱离浆槽30的湿胚2部位持续受真空吸力10吸附植物纤维纸浆3，利用植物纤维的相互交织叠加，而使较厚厚度B的部位可以得到预设的纤维厚度，在热压定型时该湿胚2受到上、下模的合模力，而令湿胚2成为具二种不同厚薄度的状态，从而得到高强度及高定型的纸塑产品，可应用于具有一定深度或高度的纸塑杯体、杯盖、蛋托、工业包装盒等各类纸塑产品。
请参阅图5至图7所示的实施例，其以不同模具4样式作为说明但不受限模具4样式，本发明第三种工艺手段为：当翻转式成型机驱动一模具4吸浆完成，而形成一湿胚5后，令可编程逻辑控制器旋转模具4至所设定的角度，在位于浆槽30中的湿胚5部位仍持续受真空吸力40吸附植物纤维纸浆3，使需要加厚的湿胚5部位持续在浆槽30内吸附植物纤维纸浆3，利用植物纤维的相互交织叠加，而使较厚厚度B的部位可以获得较厚的纤维厚度，随后该湿胚5再经由热压定型，使该湿胚5成为同时具备有较厚厚度B的部位及较薄厚度A的部位等局部区域厚薄度不同的成品，经由热压定型后的成品，于较厚厚度B的部位更具有稳定的高强度及高定型，可应用于工业包装盒或需要某个部位加强强度的纸塑产品。
综上所述，本发明具有下列优点。
一、模具1不需要变更或修改，仅利用上、下模合模时将较厚厚度B的部位压得更扎实，且从外观是看不出差异性，从而令产品的较厚厚度B的部位具有更高强度及定型力。
二、当纸塑工业包装盒在倾斜角度吸浆过程中，可以利用可编程逻辑控制器来控制更精确的吸浆时间，从而得到所需的预计厚度，不需要额外的模具1调整或修改硬件结构。
三、本发明的工艺手段仅需在纸塑成型机上直接加装可编程逻辑控制器即可控制吸浆的模具1停留时间段差、模具1吸浆时脱离浆槽30的上升速度、模具1倾斜角度差等吸浆方式来达成所需的不同厚度的湿胚2，不需额外修改成型机上的机构。

Claims (5)

  1. 一种可制作不同厚度的纸塑产品成型工艺，其特征在于：利用一可编程逻辑控制器来控制一纸塑成型机的吸浆的模具停留在一浆槽吸附其内部设置的植物纤维纸浆的时间段差、该模具吸浆时脱离浆槽的上升速度、该模具的倾斜角度差等吸浆方式，再配合该植物纤维纸浆的植物纤维相互间的交织叠加来达到同一湿胚在不同区域或不同部位产生不同的厚薄度的纸塑湿胚工艺手段。
  2. 如权利要求1所述的可制作不同厚度的纸塑产品成型工艺，其特征在于：该纸塑成型机为一往复式成型机或一翻转式成型机。
  3. 如权利要求1所述的可制作不同厚度的纸塑产品成型工艺，其特征在于：所述工艺手段为：当成型机驱动模具吸浆完成，而形成一湿胚后，令可编程逻辑控制器控制模具缓慢且渐进式地上升，使先脱离浆槽的湿胚依然受真空吸力维持紧贴模具的形态，其先脱离浆槽的湿胚维持原有的厚度形态，而尚未脱离浆槽的湿胚部位则继续受真空吸力，并持续吸附植物纤维纸浆直至预设的时间，而当完成吸浆动作后，最先脱离浆槽的湿胚部位为较薄厚度，而最迟离开浆槽的湿胚部位则为较厚厚度，利用植物纤维的相互交织叠加，而使较厚厚度的部位获得较厚的纤维厚度，并在热压成型后，使该湿胚形成由上往下为最薄至最厚的不同厚薄度状态，较厚厚度的部位强度提高，使得到定型力更强的纸塑产品，其应用于杯体、较高且较深的产品或某一端需要较强定型力的纸塑产品。
  4. 如权利要求1所述的可制作不同厚度的纸塑产品成型工艺，其特征在于：所述工艺手段为：当成型机驱动模具吸浆完成，而形成一湿胚后，令可编程逻辑控制器提升模具至预设距离后暂停上升，使尚未脱离浆槽的湿胚部位持续受真空吸力吸附植物纤维纸浆，利用植物纤维的相互交织叠加，而使较厚厚度的部位得到预设的纤维厚度，在热压定型时该湿胚受到上、下模的合模力，而令湿胚成为具二种不同厚薄度的状态，从而得到高强度及高定型的纸塑产品，应用于具有一定深度或高度的纸塑杯体、杯盖、蛋托、工业包装盒。
  5. 如权利要求2所述的可制作不同厚度的纸塑产品成型工艺，其特征在于：所述工艺手段为：当翻转式成型机驱动模具吸浆完成，而形成一湿胚后，令可编程逻辑控制器旋转模具至所设定的角度，在位于浆槽中的湿胚部位仍持续受真空吸力吸附植物纤维纸浆，使需要加厚的湿胚部位持续在浆槽内吸附植物纤维纸浆，利用植物纤维的相互交织叠加，而使较厚厚度的部位获得较厚的纤维厚度，随后该湿胚再经由热压定型，使该湿胚成为同时具备有较厚厚度的部位及较薄厚度的部位等局部区域厚薄度不同的成品，经由热压定型后的成品，于较厚厚度的部位更具有稳定的高强度及高定型，可应用于工业包装盒或需要某个部位加强强度的纸塑产品。
PCT/CN2022/121303 2022-09-26 2022-09-26 可制作不同厚度的纸塑产品成型工艺 WO2024065084A1 (zh)

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