CN114889220A - Processing technology of hot-press welding formed paper holder of multilayer paper card precoated with hot melt adhesive - Google Patents
Processing technology of hot-press welding formed paper holder of multilayer paper card precoated with hot melt adhesive Download PDFInfo
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- CN114889220A CN114889220A CN202210468158.6A CN202210468158A CN114889220A CN 114889220 A CN114889220 A CN 114889220A CN 202210468158 A CN202210468158 A CN 202210468158A CN 114889220 A CN114889220 A CN 114889220A
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- 238000012545 processing Methods 0.000 title claims abstract description 23
- 238000005516 engineering process Methods 0.000 title claims abstract description 16
- 238000003466 welding Methods 0.000 title claims abstract description 14
- 239000000123 paper Substances 0.000 claims abstract description 161
- 239000010410 layer Substances 0.000 claims abstract description 34
- 238000003825 pressing Methods 0.000 claims abstract description 33
- 239000011087 paperboard Substances 0.000 claims abstract description 31
- 238000005520 cutting process Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 18
- 238000013461 design Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 12
- 238000000576 coating method Methods 0.000 claims abstract description 12
- 239000003292 glue Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000000465 moulding Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 9
- 238000004026 adhesive bonding Methods 0.000 claims description 8
- 239000012790 adhesive layer Substances 0.000 claims description 6
- 230000004927 fusion Effects 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims description 2
- 238000012856 packing Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 2
- 238000005266 casting Methods 0.000 claims 1
- 238000004512 die casting Methods 0.000 claims 1
- 238000007765 extrusion coating Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 20
- 238000007731 hot pressing Methods 0.000 abstract description 13
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000000748 compression moulding Methods 0.000 abstract description 3
- 239000000853 adhesive Substances 0.000 description 10
- 230000001070 adhesive effect Effects 0.000 description 10
- 229920001131 Pulp (paper) Polymers 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 238000004537 pulping Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 238000002844 melting Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
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- 239000002351 wastewater Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
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- 238000007906 compression Methods 0.000 description 2
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000007373 indentation Methods 0.000 description 2
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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
- B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
- B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
- B31D5/02—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles including pressing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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- Paper (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a paper holder processing technology for hot-press welding and forming of multilayer paper cards precoated with hot melt adhesive. The key points of the technical scheme are as follows: the method comprises the following steps of 1: coating the paperboard with glue, and coating a hot melt adhesive layer on the surface of the paperboard; step 2: designing a pattern and a die, designing a plane paper card and a corresponding matched die cutting knife plate, and designing a hot-pressing die; and step 3: the paperboard die cutting is carried out, wherein the paperboard is divided into different layers according to the design requirement of the paper holder, and the paperboard corresponding to the different layers is respectively die-cut and processed into plane paper cards; and 4, step 4: stacking the paper cards, namely sequentially stacking the paper cards subjected to die cutting according to the hierarchical arrangement requirement of the paper cards; and 5: and (3) hot press forming, namely performing hot press forming processing on the stacked multiple layers of paper cards, performing mould pressing operation, heating the paper cards, and adhering the paper cards to finish paper support forming. The invention realizes the adhesion and compression molding of multiple layers of paper cards, realizes the rapid manufacture of paper holders, reduces pollution, saves energy consumption, improves the stability and production efficiency of products, and effectively reduces production cost.
Description
Technical Field
The invention relates to a paper holder forming process, in particular to an environment-friendly three-dimensional paper holder processing process capable of performing hot-press fusion forming after die cutting on 2 or more layers of paper cards precoated with hot-melt adhesive.
Background
The existing 2 paper holder forming processes are paper pulp molding paper holder forming process and local gluing manual paper holder forming process.
The paper pulp molding paper holder forming process needs the processes of pulping, pulp conveying, water mold pulp fishing, compression molding, drying, die cutting and waste removal and the like. It uses waste newspaper, paper box leftover material, recovered paper tube, raw wood pulp board or cane pulp residue as raw material, and adopts the processes of hydraulic pulping and proportioning to prepare pulp material with a certain concentration, then the pulp material is passed through a specially-made metal mould and pressed into wet blank product, and the wet blank product is dried and hot-pressed into a paper pulp product.
The pulp molding paper holder forming process needs a pulping and pulp mixing procedure, and can generate more waste water and waste gas; the slurry fishing pressing die drying process, particularly the wet pressing paper support slurry fishing pressing die drying process, requires that liquid paper pulp is dried into a paper support with low moisture content in a short time, and has very high energy consumption and low output. The post-processing technology of the product surface has great limitation.
A technology for manually forming paper holder by local gluing includes such steps as die cutting to obtain 2 or more layers of paper cards, local gluing (scraping silk screen, spraying mechanical drawing glue, or manually applying drawing glue, or sticking double-sided glue). The process uses wet glue, has low adhesion stability, has poor product integrating degree of the manually manufactured special-shaped geometric three-dimensional paper holder, cannot design a clamping point clamping groove, cannot meet the requirements of product support protection and easy taking, and has low production efficiency of manual manufacturing process.
Therefore, there is a need for an improved solution to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention aims to provide a paper holder processing technology for hot-press fusion molding of multilayer paper cards precoated with hot melt adhesive, so as to realize adhesion and compression molding of the multilayer paper cards, realize rapid manufacturing of the paper holder, reduce pollution, save energy consumption, simultaneously improve the stability and production efficiency of products and effectively reduce production cost.
The technical purpose of the invention is realized by the following technical scheme: the hot melt adhesive precoated multilayer paper card hot-press welding formed paper holder processing technology comprises the following steps:
step 1: coating the paperboard with glue, and coating a hot melt adhesive layer on the surface of the paperboard;
step 2: designing a pattern and a die, namely designing planar paper cards with different levels and different shapes and corresponding matched die cutting knife plates according to the design requirements of a paper support, and designing an upper primary die and a lower primary die at the same time, wherein the die design comprises the design of the paper support plane, a cavity, a clamping point and a clamping groove position which play a supporting role;
and step 3: the paperboard die cutting is to respectively die cut paperboard corresponding to different layers into plane paper cards with different patterns according to the design requirements of the paper holder;
and 4, step 4: stacking the paper cards, and sequentially stacking the paper cards subjected to die cutting according to the arrangement requirement of the paper cards in the designed paper support; the gluing surface of the upper layer paper card faces downwards, the gluing surface of the lower layer paper card faces upwards, and the gluing surface of the middle auxiliary layer paper card does not consider the direction;
and 5: and (3) hot press forming, namely putting the stacked multiple layers of paper cards into a hot press machine provided with an upper primary and a lower primary die for hot press forming processing, carrying out mould pressing operation by the hot press machine while heating the paper cards, and mutually bonding the hot melt adhesive layer on the surfaces of the paper cards and the paper cards or the adhesive layers on the surfaces of the paper cards to finish the paper support forming.
The invention is further configured as follows: in the step 1, when paper is selected, the paper type is selected according to paper processing adaptability, and the paper adaptability comprises paper printing ink absorption performance, ink dot expansibility, surface explosion color resistance, gold stamping adhesive force, embossing and bump resistance.
The invention is further provided with: in the step 1, before the hot melt adhesive layer is coated on the surface of the card paper, the surface of the card paper is subjected to corona treatment, so that the interlayer bonding force between the hot melt adhesive layer and the card paper can be effectively increased.
The invention is further provided with: in step 2, in the figure and mould design link, according to the product geometry, can be in spatial structure internal design stuck point or draw-in groove for support the product, can slow down the transportation vibrations on the one hand and promote packing barrier propterty, on the other hand keeps away the space that product and paper held in the palm through the stuck point draw-in groove in the paper holds in the palm, conveniently takes out the product.
The invention is further provided with: in step 3, before the paper cards of different layers are respectively subjected to special-shaped die cutting processing, surface finishing processing of the paper card of the first layer, including printing, film coating, glazing, gold stamping and other processes, can be added, so that the attractiveness and brand added value of the product are increased.
The invention is further provided with: in step 5, the hot press forming machine includes a machine body, a lower press mold fixed on the machine body, an upper press mold slidably connected to the machine body in a vertical direction and located right above the lower press mold, and a pneumatic or hydraulic component disposed on the machine body and driving the upper press mold to lift, wherein a heat conducting pressing plate is disposed on a lower end surface of the lower press mold and/or an upper end surface of the upper press mold, and both the lower press mold and the upper press mold have heat conducting properties.
In conclusion, the invention has the following beneficial effects:
the paper support is produced by the scheme, and the paper support can be molded by adopting a metal mold similar to a paper support molding process, so that the concave part of the paper support is completely matched with the geometric shape of a product; let the stable in structure of paper support, greatly promote the paper support to the protective properties of product and take the convenience.
The novel paperboard can be made of traditional paperboard materials, and various post-processing technologies can be made on the surface of the paperboard; therefore, the market diversity of the paper holder product can be kept and the aesthetic property can be increased; meanwhile, the production of pulping waste water and waste gas in the production of the paper pulp molding paper holder is avoided, the high energy consumption in the compression mold drying process is avoided, and the carbon emission is saved.
The hot-melt adhesive is coated on one side or two sides of the paperboard in advance, the adhesive needs to be kept in a solid state at normal temperature, so that die-cutting indentation and surface finishing processing are facilitated, and the laminated paper paperboard can be rapidly melted and has adhesive performance when heated and pressurized by a hot-pressing die, so that a welding function is realized; meanwhile, the adhesive layer needs to be rapidly cooled to recover the solid state, so that the paper support is rapidly and stably molded, and the demolding and taking out are facilitated.
The existing general hot pressing machine is used for mechanical production, and the stability and the production efficiency of the product are improved by using a mechanical manufacturing process, so that the production cost of the paper holder is greatly reduced.
Drawings
FIG. 1 is a schematic structural view of a hot press molding machine according to the present invention;
fig. 2 is a schematic view of the paper holder of the present invention.
The corresponding part names indicated by the numbers in the figures: 1. a body; 2. pressing the die downwards; 3. pressing the die upwards; 4. pneumatic or hydraulic components; 5. thermally pressing the adhesion plate; 6. and a positioning pin.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purposes and the effects of the invention easy to understand, the invention is further described with reference to the figures and the specific embodiments.
As shown in fig. 1 and fig. 2, the processing technology of the paper holder formed by hot-press welding the multilayer paper card precoated with hot melt adhesive provided by the invention comprises the following steps:
step 1: and (4) coating the paperboard with glue, and coating a hot melt adhesive layer on the surface of the paperboard. The coating weight of the hot melt adhesive layer needs to be calculated according to the characteristics of the adhesive material. Wherein the hot melt adhesives include, but are not limited to, aqueous hot melt adhesives, ultraviolet light curable hot melt adhesives, electron beam curable hot melt adhesives, cast and extrusion coated resin hot melt adhesives. The hot melt adhesive layer is solid after being coated, has no viscosity, can be melted after being heated and has welding performance. The adhesive with different properties needs to ensure that the processing requirements of melting, bonding and cooling the film can be rapidly completed between the adhesive and the paper card and between the adhesive and the paper card within a certain temperature, pressure and pressing time. In addition, for promoting the adhesive force of hot melt adhesive layer, before coating hot melt adhesive layer to the card paper surface, carry out corona treatment to the card paper surface to strengthen the cohesion between card paper surface and the hot melt adhesive layer.
Step 2: the design method comprises the steps of designing patterns and dies, designing planar paper cards with different levels and different shapes and die cutting tool plates matched correspondingly according to the design requirements of the paper support, designing an upper primary and secondary hot pressing die, and designing the dies to comprise paper support planes, cavities, clamping points and clamping groove positions which play a supporting role.
And step 3: and die-cutting paperboard according to the design requirements, and die-cutting the paper cards at each layer position through the corresponding knife board according to the layer requirements of the designed paper support.
And 4, step 4: and (4) stacking the paper cards, arranging according to the corresponding layers of the paper cards in the designed paper support, and sequentially stacking the paper cards subjected to die cutting.
And 5: and (3) die filling, namely installing the upper and lower hot-pressing primary and secondary dies on a hot-pressing machine in a set, and starting up the hot-pressing machine to conduct heat, so that the hot-pressing temperature, the die pressing time and the hot-pressing pressure of the hot-pressing machine are consistent with the hot-melting performance of the hot-melting adhesive layer of the paper card.
Step 6: and (4) hot-press forming, namely performing hot-press forming on the stacked multilayer paper cards through a hot-press forming machine. And (3) placing the stacked multilayer paper cards into a hot-press forming machine, positioning, carrying out mould pressing, fusing and quickly solidifying the hot-melt adhesive layers among the multilayer paper cards, mutually bonding the paper cards, and finishing the paper support forming. Meanwhile, because the die cutting shapes of the paper cards in different layers are different, a paper support cavity for placing articles is formed after the paper cards in the multiple layers are molded, and the paper support cavity is formed by overlapping the paper cards in different die cutting modes. In addition, the clamping points and the clamping grooves can be processed according to the shape of the placed object, and the multilayer paper card supports and clamps the product corresponding to the geometric shape of the cavity after being subjected to die cutting and hot pressing.
In step 6, the hot press forming machine comprises a machine body 1, a lower pressing die 2 fixed on the machine body 1, an upper pressing die 3 connected to the machine body 1 in a sliding mode along the vertical direction and located right above the lower pressing die 2, and a pneumatic or hydraulic component 4 arranged on the machine body 1 and driving the upper pressing die 3 to lift, wherein the output end of the pneumatic or hydraulic component 4 is vertically arranged downwards, the lower pressing die 2 is provided with a die cavity, and the upper pressing die is provided with a corresponding convex die block. Namely, after the pneumatic or hydraulic component 4 drives the upper pressing die to move downwards, the multi-layer paper card is molded, and a paper holder cavity with the shape consistent with that of the die cavity is formed. The lower end face of the lower pressing die 2 and/or the upper end face of the upper pressing die 3 are/is provided with a heat conduction pressing plate 5, the lower end face of the lower pressing die 2 and the upper end face of the upper pressing die 3 are/is provided with the heat conduction pressing plate 5 in the embodiment, and the lower pressing die 2 and the upper pressing die 3 have heat conduction performance. The heating and heat conducting pressing plate 5 is realized through a corresponding heater, then heat is transferred to the paper cards through the corresponding lower pressing die 2 and the corresponding upper pressing die 3, so that the hot melt adhesive is melted, after the hot melt adhesive is cooled and solidified, the multiple layers of paper cards are adhered, and the heating mode of the heater can be an electric heating, high-frequency or ultrasonic heat conducting mode. In addition, the machine body 1 is provided with a positioning pin 6 for positioning the paper card to be placed at the position of the lower pressing die 2, and the positioning pin 6 is used for ensuring that the multilayer paper card is correctly placed on the lower pressing die 2.
The paper support is produced by the scheme, and the paper support can be molded by adopting a metal mold similar to a paper support molding process, so that the concave part of the paper support is completely matched with the geometric shape of a product; let the stable in structure of paper support, greatly promote the paper support to the protective properties of product and take the convenience. In addition, the novel paperboard can be made of traditional paperboard materials, and various post-processing technologies can be made on the surface of the paperboard; therefore, the market diversity of the paper holder product can be kept and the aesthetic property can be increased; meanwhile, the production of pulping waste water and waste gas in the production of the paper pulp molding paper holder is avoided, the high energy consumption in the compression mold drying process is avoided, and the carbon emission is saved. The hot-melt adhesive is coated on one side or two sides of the paperboard in advance, the adhesive needs to be kept in a solid state at normal temperature, so that die-cutting indentation and surface finishing processing are facilitated, and the laminated paper paperboard can be rapidly melted and has adhesive performance when heated and pressurized by a hot-pressing die, so that a welding function is realized; meanwhile, the adhesive layer needs to be rapidly cooled to recover the solid state, so that the paper support is rapidly and stably molded, and the demolding and taking out are facilitated. The existing general hot pressing machine is used for mechanical production, and the stability and the production efficiency of the product are improved by using a mechanical manufacturing process, so that the production cost of the paper holder is greatly reduced.
In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the purpose of clarity and convenience of description of the technical solutions, and thus, should not be construed as limiting the present invention.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The processing technology of the hot-melt adhesive precoated multilayer paper card hot-press welding formed paper support is characterized in that: the method comprises the following steps:
step 1: coating the paperboard with glue, and coating a hot melt adhesive layer on the surface of the paperboard;
step 2: designing a pattern and a die, firstly designing planar paper cards with different levels and different shapes and correspondingly matched die cutting tool plates according to the design requirements of the paper holder, and designing an upper primary and secondary die at the same time, wherein the die comprises a paper holder plane, a cavity, and a clamping point and a clamping groove position design which play a supporting role;
and step 3: the paperboard die cutting is to respectively die cut paperboard corresponding to different layers into plane paper cards with different patterns according to the design requirements of the paper holder;
and 4, step 4: stacking the paper cards, and sequentially stacking the paper cards subjected to die cutting according to the arrangement requirement of the paper cards in the designed paper support; the gluing surface of the upper layer of paper card faces downwards, and the gluing surface of the lower layer of paper card faces upwards;
and 5: and (3) hot press forming, namely putting the stacked multiple layers of paper cards into a hot press machine provided with an upper primary and a lower primary die for hot press forming processing, carrying out mould pressing operation by the hot press machine while heating the paper cards, and mutually bonding the hot melt adhesive layer on the surfaces of the paper cards and the paper cards or the adhesive layers on the surfaces of the paper cards to finish the paper support forming.
2. The hot melt adhesive precoated multilayer paper card hot-press fusion molding paper holder processing technology according to claim 1, characterized in that: in step 1, a hot melt adhesive layer is coated on the surface of the paperboard, the coating mode comprises the coating processing of a reel material and a flat material, the paperboard material comprises coated paperboard, uncoated paperboard, aluminized paper and laminated paperboard, and the coated hot melt adhesive comprises water-based hot melt adhesive, ultraviolet light-cured hot melt adhesive, electron beam-cured hot melt adhesive, casting and extrusion coating resin hot melt adhesive.
3. The hot melt adhesive precoated multilayer paper card hot-press fusion molding paper holder processing technology according to claim 1, characterized in that: in steps 2 and 3, the paper support can be formed by laminating and welding 2, 3 or more layers of paper cards according to the structure of the product.
4. The hot melt adhesive precoated multilayer paper card hot-press welding forming paper holder processing technology according to claim 1, characterized in that: in step 2, according to the product geometry, the inside design stuck point or draw-in groove of spatial structure for support the product, and slow down the transportation vibrations and promote packing barrier propterty, leave the space of product and paper support through the stuck point draw-in groove in the paper support, conveniently take out the product.
5. The hot melt adhesive precoated multilayer paper card hot-press fusion molding paper holder processing technology according to claim 1, characterized in that: in the step 5, the hot-press forming machine comprises a machine body (1), a lower press die (2) fixed on the machine body (1), an upper press die (3) connected to the machine body (1) in a sliding mode along the vertical direction and located right above the lower press die (2), and a pneumatic or hydraulic component (4) arranged on the machine body (1) and driving the upper press die (3) to lift, wherein a heat-conducting pressing plate (5) is arranged on the lower end face of the lower press die (2) and/or the upper end face of the upper press die (3), and the lower press die (2) and the upper press die (3) both have heat-conducting performance.
6. The hot melt adhesive precoated multilayer paper card hot-press welding forming paper holder processing technology according to claim 1, characterized in that: in step 5, the hot-press forming machine comprises a stamping machine, a hot-press die-casting machine, a high-frequency welding machine and an ultrasonic welding machine. The paper card is conducted by electric heat or high frequency or ultrasonic waves, the upper die and the lower die are heated, and the pre-coated adhesive layer on the surface of the paper card is melted by heat in the laminating process to have viscosity, so that the laminated part of the paper card is bonded and welded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210468158.6A CN114889220B (en) | 2022-04-29 | 2022-04-29 | Paper holder processing technology for hot-press welding forming of multilayer paper card precoated with hot melt adhesive |
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| CN202210468158.6A CN114889220B (en) | 2022-04-29 | 2022-04-29 | Paper holder processing technology for hot-press welding forming of multilayer paper card precoated with hot melt adhesive |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB2625629A (en) * | 2022-11-09 | 2024-06-26 | Pusterla 1880 S P A | Multilayer package element, package comprising such element and process for making such package element |
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