CN114275273A

CN114275273A - Scratch detection method for plastic sleeve label

Info

Publication number: CN114275273A
Application number: CN202210066484.4A
Authority: CN
Inventors: 李传奎; 殷华峰; 张有客; 许尚飞; 朱多敏; 袁勇
Original assignee: Anhui Ziquan Intelligent Label Technology Co ltd
Current assignee: Anhui Ziquan Intelligent Label Technology Co ltd
Priority date: 2022-01-20
Filing date: 2022-01-20
Publication date: 2022-04-05

Abstract

The invention discloses a scratch detection method for a label of a plastic sleeve label, which comprises the steps of palm folding the label, sleeving the palm folded label on a cylinder, heating the label to enable the label to be attached to the cylinder after thermal shrinkage, checking whether the thermal shrunk label is provided with a through hole or not, and checking whether the label is scratched or not to enable the label to be scrapped or not by checking whether the thermal shrunk label is provided with the through hole or not by an inspector.

Description

Scratch detection method for plastic sleeve label

Technical Field

The invention relates to the technical field of plastic label detection, in particular to a scratch detection method for a plastic sleeve label.

Background

At present, each unique plastic label sleeve is sleeved on a bottle body of bottled drinks such as drinks, milk and the like on the market, when the plastic label sleeve is produced, a manufacturer usually firstly manufactures a whole roll of plastic film, the plastic film is flatly laid on a rubber guide roller and is driven by the guide roller to respectively enter printing equipment, a slitting mechanism and palm folding equipment for printing, slitting and palm folding, the palm folded plastic label sleeve is manually detected and then enters a winding machine for winding through the transmission of the rubber guide roller, however, in the whole production process of the label, the label is laid on the rubber guide roller and is driven by the rubber guide roller to move among the equipment, as the label production equipment is numerous, the used rubber guide rollers are numerous, the surfaces of the rubber guide rollers which run in a factory for a long time can be stained with large-particle dust in the factory or art designing blades are embedded on the rubber guide rollers, the label is easy to scratch when the rubber guide roller is driven, so that regular scratches are caused, and the scratched label is easy to produce a larger opening at the scratched position after being contracted onto a bottle body in use, so that a defective product is formed; the inspection personnel can hardly detect the small scratch when detecting the label, and particularly after the label is folded, the annular label is folded into a plane shape, so that one half of the label is covered by the other half of the label, and the detection of the scratch is more difficult.

Disclosure of Invention

The invention aims to provide a scratch detection method for a plastic sleeve label, which solves the problem that fine scratches on the label are difficult to detect in the prior art.

The purpose of the invention can be realized by the following technical scheme:

a method for detecting scratches of a label of a plastic sleeve label comprises the steps of palm folding of the label, sleeving the palm folded label on a cylinder, heating the label to enable the label to be attached to the cylinder after thermal shrinkage, checking whether a through hole is formed in the thermally shrunk label or not, and judging whether scratches exist on the label if the through hole is formed in the thermally shrunk label.

As a further scheme of the invention: the inner diameter perimeter of the label is 2mm-6mm greater than the outer perimeter of the cylinder.

As a further scheme of the invention: the inner diameter perimeter of the label is 4mm greater than the outer perimeter of the cylinder.

As a further scheme of the invention: the heat shrinkage temperature of the label is 90-95 ℃.

As a further scheme of the invention: the label is heat shrunk by a garment steamer.

The invention has the beneficial effects that: through establishing the plastic label cover on the cylinder, carry out the thermal contraction processing to plastic label, make label thermal contraction after paste on the cylinder, at this moment, if have the fish tail on the label, fish tail department can form the through-hole after the label thermal contraction, whether the inspection personnel have the through-hole on the label through observing after the thermal contraction can be clear, quick detect out whether have on the label make the condemned fish tail of label easily.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic flow chart of the present invention.

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.

Referring to fig. 1, the invention is a scratch detection method for plastic label with cover, which is used to detect whether the plastic label with cover has scratch (such as deep scratch or scratch which is easy to tear after thermal shrinkage and generates through hole) which can make the label waste when in use, specifically, when the label is manufactured, the plastic film is processed through a plurality of processes such as printing, slitting, folding, rolling, etc. to form a roll of label, each roll of label contains a plurality of labels which are connected in sequence, and between different processes, the plastic film is sequentially delivered into different processing equipment through a rubber guide roller for processing, when in use, the bottle body can be sequentially covered with the label by placing the rolled label on a cover marking machine, in this embodiment, when the label is folded, the label is a double-layer plastic which is overlapped together, and the label can be supported to form a ring shape, and the labels are connected in tail, the label that will follow one another in proper order is cut off not less than single rubber deflector roll outer perimeter length on the label, will cut off the label cover under will be established the label and is supported into the ring-type on the cylinder, and preferably, the cylinder can set up to the cylinder, the internal diameter girth of label is greater than the outer perimeter 2mm-6mm of cylinder.

The diameter difference between the label and the cylinder is avoided too big when making the label can overlap on the cylinder, is favorable to later stage label heat shrink to laminate on the cylinder, admittedly, in other embodiments, the cylinder also can set up to rhombus cylinder or body etc. does not do specific restriction here.

After the label is sleeved on the cylinder, the label on the cylinder is heated, so that the label is thermally shrunk and can be attached to the surface of the cylinder, preferably, in the embodiment, the inner diameter perimeter of the label is larger than the outer perimeter of the cylinder by 4mm, so that the label can be attached to the surface of the cylinder in the thermal shrinkage process and the surface of the label can be stretched to a certain extent, at the moment, when a scratch is formed on the label, the scratch is enlarged in the thermal shrinkage process, so that the scratch is changed into an approximately circular through hole, and when the label is not scratched, the surface of the label after thermal shrinkage can be intact; so far, whether the inspection personnel have the through-hole through observing on the label after the thermal contraction can judge whether this batch label has the fish tail that makes the label become the defective products, effectively solve the artifical problem that whether has tiny fish tail on looking over the label after closing the palm through the naked eye in the past, can accurately discern regular label fish tail, but the defective products is rejected to validity, effectively prevents the outflow, reduces bad complaint rate, reduce cost. In the application, the temperature control that carries out thermal contraction with the label is at 90 ~ 95 ℃, effectively guarantees the shaping that the fish tail formed the through-hole, avoids the high temperature or crosses low and lead to not having the tag department of fish tail excessively to be pulled up and form the through-hole or the shrinkage degree fish tail is difficult to form the through-hole inadequately.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.

Claims

1. A method for detecting scratches of a label of a plastic sleeve label comprises the steps of closing a label, and is characterized in that the label after closing is sleeved on a cylinder, the label is heated to enable the label to be attached to the cylinder after thermal shrinkage, whether a through hole is formed in the label after thermal shrinkage is checked, and if the through hole is formed in the label after thermal shrinkage, it is judged that scratches exist in the label.

2. The method for detecting scratches of a plastic label according to claim 1, wherein the cylinder is a cylinder, and the inner diameter and the circumference of the label are 2mm to 6mm larger than the outer circumference of the cylinder.

3. The method as claimed in claim 2, wherein the label has an inner diameter and a circumference of 4mm greater than the outer circumference of the cylinder.

4. The method for detecting scratches of a plastic label according to claim 1, wherein the thermal shrinkage temperature of the label is 90-95 ℃.

5. The method for detecting scratches of a label of a plastic sleeve label according to claim 1, wherein the label is heat shrunk by a garment steamer.