阅读说明：本技术 一种pp中空板平口箱的加工工艺 (Processing technology of PP hollow plate flat box ) 是由 柴爱娜 庄士颐 于 2021-08-16 设计创作，主要内容包括：本发明涉及一种PP中空板平口箱的加工工艺,该加工工艺的具体操作步骤如下：步骤一：PP中空板的加工,聚丙烯粉碎后造粒,将聚丙烯颗粒挤塑成型中空板,依次经过模切机完成热压模切、热熔封边机完成热熔封边以及丝网印刷,获得成品PP中空板；步骤二：将两个PP中空板进行折叠组装后获得平口箱成品；热压模切工艺,实现产品整周封边,产品可全面水洗清洁,热熔封边工艺,实现了摇盖切线圆弧的外形,产品边口光滑不伤手,印刷工艺实现了水性油墨的印刷,产品更加环保。(The invention relates to a processing technology of a PP hollow plate flat box, which comprises the following specific operation steps: the method comprises the following steps: processing a PP hollow plate, crushing polypropylene, granulating, performing extrusion molding on polypropylene particles to form a hollow plate, and performing hot-pressing die cutting through a die cutting machine, hot-melting edge sealing through a hot-melting edge sealing machine and screen printing in sequence to obtain a finished PP hollow plate; step two: folding and assembling the two PP hollow plates to obtain a finished product of the flat box; the hot-pressing die cutting process realizes edge sealing of the product in the whole circumference, the product can be comprehensively washed and cleaned, the hot-melting edge sealing process realizes the appearance of a tangent arc of a rocking cover, the edge opening of the product is smooth and does not hurt hands, the printing process realizes printing of water-based ink, and the product is more environment-friendly.)

1. The processing technology of the PP hollow plate flat box is characterized by comprising the following specific operation steps:

the method comprises the following steps: processing a PP hollow plate, crushing polypropylene, granulating, performing extrusion molding on polypropylene particles to form a hollow plate, and performing hot-pressing die cutting through a die cutting machine, hot-melting edge sealing through a hot-melting edge sealing machine and screen printing in sequence to obtain a finished PP hollow plate;

step two: folding and assembling the two PP hollow plates to obtain a finished product of the flat box;

the specific processing technology of the PP hollow plate is as follows:

s1, performing extrusion molding, namely crushing polypropylene, granulating by a granulator, and then performing extrusion molding on polypropylene particles to form a hollow plate;

s2, hot-pressing die cutting, wherein during die cutting, a cutting die of the die cutting machine is heated, pressure is maintained for 15 seconds after the cutting die is pressed downwards, and the die is opened after the PP hollow board is heated and molded, so that hot-pressing die cutting is completed;

s3, performing hot melting edge sealing, namely horizontally placing the die-cut PP hollow plate on an operation platform of a hot melting edge sealing machine, enabling the PP hollow plate to enter between rollers for forward conveying, heating the mould to 190 plus 200 ℃ by virtue of model grooves with arc appearance characteristics on two sides of the platform, and thermally deforming the edges of the inner rocking cover (5) and the outer rocking cover (4) conveyed through the mould to finish the appearance characteristics of the arc edges;

s4, screen printing, namely adding a corona procedure in the extrusion molding and plate manufacturing process of the PP hollow plate, carrying out corona treatment on the surface of the PP hollow plate, then finishing the water-based ink screen printing of the PP hollow plate through a printer, and then finishing the processing of the PP hollow plate through cutting.

2. The processing technology of the PP hollow plate flat box according to claim 1, wherein two creasing knives are added to the inner side of a knife die line cutting knife of the die cutting machine, the knife die line cutting knife and the two creasing knives are arranged in parallel, and the knife die line cutting knife is positioned on the outer sides of the two creasing knives.

3. The processing technology of the flat box of the PP hollow plate according to claim 1, characterized in that the PP hollow plate comprises a side plate (1) and an end plate (2), the two ends of the side plate (1) are respectively provided with the end plate (2) and a joint (3), the top and the bottom of the side plate (1) are respectively provided with an outer rocking cover (4), the top and the bottom of the end plate (2) are respectively provided with an inner rocking cover (5), and a slot (6) is formed between the outer rocking cover (4) and the inner rocking cover (5).

4. The processing technology of the PP hollow plate flat box according to claim 3, characterized in that longitudinal pressing lines are arranged between the side plate (1) and the end plate (2) and the joint (3), transverse pressing lines are arranged between the side plate (1) and the outer rocking cover (4), and transverse pressing lines are arranged between the end plate (2) and the inner rocking cover (5).

Technical Field

The invention relates to the technical field of processing of flat boxes of PP hollow plates, in particular to a processing technology of flat boxes of PP hollow plates.

Background

The technical field that this cavity board tie-box exists in PP is the circulation packing technique, can satisfy the built-in product of packing by supplier to mill, mill to warehouse, mill to platform storehouse, warehouse to store in a shop, etc. most supply chain, can satisfy the supporting use of the automatic cover sealing at manufacturing plant, and realize recycling through current recovery network system, according to the actual cycle use condition, after reaching the circulation number of times that needs, smash the granulation, drop into raw and other materials again, carry out circulation and give a new lease of life.

When the PP hollow plate box is used in the circulating packaging industry at present, water easily enters the hollow structure of the hollow plate in the plate material during recycling and cleaning of a circulating link, and the durability is limited to a certain extent because the edge of the hollow structure is easily torn due to repeated use; the side openings of the outer rocking cover and the inner rocking cover of the product have the phenomenon that the hands are injured when the product is operated and used by personnel; due to the characteristics of the PP material, the water-based ink is difficult to adhere and form during printing, and the existing ink is not as good as the water-based ink in environmental protection and is difficult to meet the requirements in the aspect of stricter food packaging.

Disclosure of Invention

The invention solves the problem of providing a processing technology of a flat-mouth box of a PP hollow plate, which solves the problem that when the existing PP hollow plate box is used in the circular packaging industry, the hollow structure of the hollow plate is easy to enter water in a plate material during recycling and cleaning of a circular link, and the durability is limited to a certain extent because the edge of the hollow structure is easy to tear due to repeated use; the side openings of the outer rocking cover and the inner rocking cover of the product have the phenomenon that the hands are injured when the product is operated and used by personnel; due to the characteristics of the PP material, the water-based ink is difficult to adhere and form during printing, and the prior ink has lower environmental protection performance than the water-based ink and is difficult to meet the requirements in the aspect of stricter food packaging.

In order to achieve the purpose, the invention adopts the following technical scheme:

a processing technology of a PP hollow plate flat box comprises the following specific operation steps:

the method comprises the following steps: processing a PP hollow plate, crushing polypropylene, granulating, performing extrusion molding on polypropylene particles to form a hollow plate, and performing hot-pressing die cutting through a die cutting machine, hot-melting edge sealing through a hot-melting edge sealing machine and screen printing in sequence to obtain a finished PP hollow plate;

step two: folding and assembling the two PP hollow plates to obtain a finished product of the flat box;

the specific processing technology of the PP hollow plate is as follows:

s1, performing extrusion molding, namely crushing polypropylene, granulating by a granulator, and then performing extrusion molding on polypropylene particles to form a hollow plate;

s2, hot-pressing die cutting, wherein during die cutting, a cutting die of the die cutting machine is heated, pressure is maintained for 15 seconds after the cutting die is pressed downwards, and the die is opened after the PP hollow board is heated and molded, so that hot-pressing die cutting is completed;

s3, performing hot melting edge sealing, namely horizontally placing the die-cut PP hollow plate on an operation platform of a hot melting edge sealing machine, enabling the PP hollow plate to enter between rollers for forward conveying, heating the die to 190 plus 200 ℃ by virtue of model grooves with arc appearance characteristics on two sides of the platform, and thermally deforming the edges of the inner rocking cover and the outer rocking cover conveyed through the die to finish the appearance characteristics of the arc edges;

s4, screen printing, namely adding a corona procedure in the extrusion molding and plate manufacturing process of the PP hollow plate, carrying out corona treatment on the surface of the PP hollow plate, then finishing the water-based ink screen printing of the PP hollow plate through a printer, and then finishing the processing of the PP hollow plate through cutting.

Preferably, two creasing knives are additionally arranged on the inner side of the cutting die line cutting knife of the die cutting machine, the cutting die line cutting knife and the two creasing knives are arranged in parallel, and the cutting die line cutting knife is positioned on the outer sides of the two creasing knives.

Preferably, the hollow plate includes curb plate and end plate in the PP, and the curb plate both ends are provided with end plate and joint respectively, curb plate top and bottom all are provided with the outer lid that shakes, the end plate top and bottom all are provided with the interior lid that shakes, shake outward and shake and seted up the fluting between the lid in with.

Preferably, be provided with the line ball of indulging between curb plate and end plate and the joint, the curb plate with shake outward and be provided with horizontal line ball between the lid, and the end plate with shake in and be provided with horizontal line ball between the lid.

The invention has the beneficial effects that:

the hot-pressing die cutting process can enable the edge of the hollow plate with the hollow structure to reach a closed state, and when a product is washed and cleaned by water or meets other liquid, the closed edge can prevent water or other liquid from entering, so that the cleaning function of the PP hollow plate plastic box is improved;

the closed edge can reduce the ductility of the edge of the PP hollow plate, so that the product is stable and not easy to deform for a long time;

the closed edge can prevent the hollow board from cracking inwards from the edge along the corrugation direction in use, and the durability of the product is improved;

the hot melting edge sealing process enables the side openings of the outer rocking cover and the inner rocking cover of the product to have the characteristic of arc smoothness, avoids the phenomenon of hand cutting when used by personnel, and improves the safety;

the PP hollow plate box is safer in the fields of food and the like by adopting water-based ink printing, and the environmental protection property of the box is improved;

the hot-pressing die cutting process realizes edge sealing of the product in the whole circumference, the product can be comprehensively washed and cleaned, the hot-melting edge sealing process realizes the appearance of a tangent arc of a rocking cover, the edge opening of the product is smooth and does not hurt hands, the printing process realizes printing of water-based ink, and the product is more environment-friendly.

Drawings

FIG. 1 is a flow chart of PP hollow plate processing according to the present invention;

FIG. 2 is a schematic diagram of a PP hollow plate structure according to the present invention.

Illustration of the drawings:

1. a side plate; 2. an end plate; 3. a joint; 4. an outer rocking cover; 5. an inner rocking cover; 6. and (4) slotting.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Specific examples are given below.

Referring to fig. 1, a processing technology of a PP hollow plate flat box includes the following specific operation steps:

the method comprises the following steps: processing a PP hollow plate, crushing polypropylene, granulating, performing extrusion molding on polypropylene particles to form a hollow plate, and performing hot-pressing die cutting through a die cutting machine, hot-melting edge sealing through a hot-melting edge sealing machine and screen printing in sequence to obtain a finished PP hollow plate;

step two: folding and assembling the two PP hollow plates to obtain a finished product of the flat box;

the specific processing technology of the PP hollow plate is as follows:

s1, performing extrusion molding, namely crushing polypropylene, granulating by a granulator, and then performing extrusion molding on polypropylene particles to form a hollow plate;

s2, hot-pressing die cutting is carried out, during die cutting, two creasing knives are additionally arranged on the inner side of a knife die line cutting knife of the die cutting machine, the knife die line cutting knife and the two creasing knives are arranged in parallel, the knife die line cutting knife is positioned on the outer sides of the two creasing knives, a knife die of the die cutting machine is heated, after the knife die is pressed down, pressure is maintained for 15 seconds, after a PP hollow plate is heated and molded, the die is opened, hot-pressing die cutting is completed, the edge is sealed, and the PP hollow plate can be cleaned and sterilized by matched cleaning equipment;

s3, performing hot melting edge sealing, namely horizontally placing the die-cut PP hollow plate on an operation platform of a hot melting edge sealing machine, enabling the PP hollow plate to enter between rollers for forward conveying, heating the mould to 190 plus 200 ℃ by virtue of model grooves with arc appearance characteristics on two sides of the platform, thermally deforming the edges of the inner rocking cover 5 and the outer rocking cover 4 conveyed through the mould to finish the appearance characteristics of the arc edges, wherein the edges of the inner rocking cover 5 and the outer rocking cover 4 are smooth and do not hurt hands;

s4, screen printing, namely adding a corona procedure in the extrusion molding and plate manufacturing process of the PP hollow plate, carrying out corona treatment on the surface of the PP hollow plate, then finishing the water-based ink screen printing of the PP hollow plate through a printer, then finishing the processing of the PP hollow plate through cutting, and carrying out corona treatment to break chemical bonds of plastic molecules to degrade, so that the surface roughness and the area are increased, and the transfer adhesion of the water-based ink during printing can meet the molding requirement.

Referring to fig. 2, the hollow plate includes curb plate 1 and end plate 2 in the PP, and 1 both ends of curb plate are provided with end plate 2 and joint 3 respectively, 1 top of curb plate and bottom all are provided with shake the lid 4 outward, 2 tops of end plate and bottom all are provided with shake in and cover 5, shake outward and cover 4 and shake in and have seted up fluting 6 between the lid 5, be provided with the line of ordinated pressing between 1 of curb plate and end plate 2 and the joint 3, be provided with the line of abscission between 1 of curb plate and the shake the lid 4 outward, and be provided with the line of abscission between 2 of end plate and the shake in and cover 5, when the hollow plate is applied to the product extranal packing in the PP, have certain substitutability to the carton. Compare in traditional carton, because the characteristic of polypropylene, the packing box of preparation is lighter, can dampproofing and dampproofing, and compressive strength is higher more durable. And polypropylene can be granulated after being crushed, and a molded packaging product is manufactured by extruding and molding the hollow plate again, so that a closed circulation link for circular reconstruction is completed, air and water sources are not polluted in the reconstruction process, great contribution can be made to environmental protection, and resources are protected.

The hot-pressing die cutting process can enable the edge of the hollow plate with the hollow structure to reach a closed state, and when a product is washed and cleaned by water or meets other liquid, the closed edge can prevent water or other liquid from entering, so that the cleaning function of the PP hollow plate plastic box is improved;

the closed edge can reduce the ductility of the edge of the PP hollow plate, so that the product is stable and not easy to deform for a long time;

the closed edge can prevent the hollow board from cracking inwards from the edge along the corrugation direction in use, and the durability of the product is improved;

the hot melting edge sealing process enables the edge openings of the outer rocking cover 4 and the inner rocking cover 5 of the product to have the characteristic of arc smoothness, avoids the phenomenon of hand cutting when used by personnel, and improves the safety;

the PP hollow plate box is safer in the fields of food and the like by adopting water-based ink printing, and the environmental protection property of the box is improved;

the hot-pressing die cutting process realizes edge sealing of the product in the whole circumference, the product can be comprehensively washed and cleaned, the hot-melting edge sealing process realizes the appearance of a tangent arc of a rocking cover, the edge opening of the product is smooth and does not hurt hands, the printing process realizes printing of water-based ink, and the product is more environment-friendly.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.