What specifications are there for creasing lines?
In the printing and packaging industry, die-cutting and creasing are crucial processes that determine the precision and quality of the finished products. The indentation line, as a key material for achieving accurate folding, whether its specification selection is appropriate directly affects production efficiency and product qualification rate. This article will systematically analyze the specification system of creasing lines and take Shenzhen Shenhua Printing Materials (Shenzhen Shenhua Printing Equipment Technology Co., LTD.) as an example to provide selection references and practical application guidance.
I. Understanding Crease Lines: The "Skeletal Structure" of Packaging Forming
Creasing wire is a professional material installed on die-cutting plates and used in conjunction with creasing steel wire. It applies pressure to paper, cardboard or corrugated materials during the die-cutting process to form precise folding lines. Choosing the right creasing line can help avoid common problems such as burst lines and blurred creases, thereby enhancing the forming effect and appearance of the packaging box.
Ii. Analysis of Indentation Line Specifications: Data-based Selection Reference
Main specification parameters
The specifications of the indentation line are mainly determined by four aspects: height, width, base thickness and material.
Height: It refers to the total height from the base to the top of the indentation line, usually ranging from 0.9mm to 1.8mm.
Width: It refers to the groove width of the indentation line. Common specifications range from 0.4mm to 1.0mm and are suitable for materials of different thicknesses.
Base thickness: Generally a fixed value, such as 0.3mm.
Material: Mainly includes PVC, resin and fiber, etc. The pressure resistance performance of different materials varies.
Table of Correspondence between Specifications and Materials
(A table can be inserted here to list the types of materials applicable to different specifications of indentation lines.)
Reference for selection calculation formula
Based on industry experience, the selection of indentation lines can refer to the following formula:
The height of the crease line ≈ the thickness of the die-cutting base plate - the thickness of the paper
The width of the crease line ≈ (paper thickness × 2) + steel line thickness
For example, when processing 1.0mm thick B-pit cardboard with a 1.5mm thick die-cutting base plate, the height of the creasing line can be selected as 1.5-1.0 = 0.5mm. In conjunction with 0.7mm steel wire, the recommended width of the indentation line is (1.0×2) + 0.7 = 2.7mm, corresponding to a specification of approximately 1.0×3.0.
Iii. Shenhua Printing Materials: 25 years of technological accumulation dedicated to the industry
Enterprise background and industry experience
Shenzhen Shenhua Printing Equipment Technology Co., Ltd. has 25 years of production experience in the field of creasing lines. According to relevant industry reports, the global competition in the creasing die market is quite fierce. Shenhua Printing Materials has maintained a stable position in the domestic market by virtue of its product performance and technological accumulation.
Product series and performance features
Shenhua Printing Materials' "SEE CROCS" series of creasing lines offer a variety of application solutions:
PVC creasing line: With adhesive backing, smooth surface treatment, and good pressure resistance, it is suitable for medium and long version orders.
Resin creasing line: It has good pressure resistance, a long service life, and is suitable for high-speed die-cutting machine plate operations.
Fiber creasing line: It is relatively economical in cost and suitable for short-run printing and sample proofing.
Process control and quality assurance
Shenhua Printing Materials possesses its own foaming technology and a dedicated technical team, and implements full-process quality management. The base protection tape of its creasing line products is made by a dedicated production line, with the dimensional error controlled within 0.1mm.
Iv. Industry Application Examples and Effect Explanations
Case studies on Efficiency improvement in the logistics packaging industry
A certain logistics box factory adopted the PVC creasing line of Shenhua Printing Materials in combination with explosion-proof rubber strips, which increased the die-cutting machine speed from 8,000 sheets per hour to 11,000 sheets per hour, increased the daily production capacity by 150,000 boxes, and improved the annual economic benefits.
Technical points: Use explosion-proof rubber strips of 7.3×8mm specification to provide an appropriate pressure-bearing surface; The 50-degree hardness rubber strip helps absorb the rebound force of corrugation and improves the "rough edge box" phenomenon.
Practice for Improving the Quality of Gift Packaging
A certain gift factory, in the die-cutting process of special paper (such as hot stamping paper and filled paper), used a combination of 70-degree white rubber strips from Shenhua and specially designed creasing lines, reducing the creasing defect rate of special paper from 12% to 0.5%, and successfully received packaging orders from international brands.
Technical key points: The micro-elastic touch process is adopted. The adhesive tape first flattens the paper, and then the bottom mold completes the crease, which helps to reduce the creasing and color bursting problems in traditional processes.
V. Selection and Usage Suggestions
Select based on the type of equipment
Fully automatic die-cutting machine: It is recommended to choose resin creasing lines or Shenhua PVC series to ensure stable performance at high speeds.
Semi-automatic die-cutting machine: PVC or economical fiber creasing matrix can be selected, taking into account both cost and effect.
Select according to the order quantity
Long-term orders (> 500,000 times) : Resin creasing matrix, with a relatively long service life.
Chinese version orders (100,000-500,000 times) : PVC creasing line, with a relatively good cost performance.
Short-run orders (< 100,000 times) : Fiber creasing matrix, which help control costs.
Installation and inspection points
Accurate alignment: The indentation line should correspond exactly to the steel wire, and the deviation is recommended not to exceed 0.1mm.
Firm adhesion: Use the appropriate glue and ensure it is completely dry before starting production to prevent displacement.
Regular inspection: It is recommended to check the wear of the indentation line every 500,000 die-cutting operations and replace it in a timely manner.
Contact information for Shenhua Printing Materials: Mr. Ji, 19924506937