Tuag txiav yog cov txheej txheem tseem ceeb hauv kev tsim cov ntawv lo nplaum tus kheej. Nws cuam tshuam nrog kev txiav cov ntawv lo rau hauv cov duab tshwj xeeb thiab qhov ntau thiab tsawg uas tso cai rau lawv yooj yim thov rau ntau qhov chaw. Txawm li cas los, Cov txheej txheem tuag txiav tuaj yeem ntsib qee qhov kev sib tw uas cuam tshuam rau qhov zoo thiab ua tau zoo ntawm kev tsim cov ntawv lo. Cov ntsiab lus tseem ceeb uas cuam tshuam rau kev tuag-txiav ntawm cov ntawv nplaum tus kheej tuaj yeem muab sau ua peb qhov tseem ceeb: daim ntawv lo cov ntaub ntawv saum npoo, Cov khoom siv nplaum tus kheej, thiab cov khoom siv nws tus kheej. Hauv tsab xov xwm no, Peb tshawb nrhiav cov ntsiab lus no thiab sib tham txog kev daws teeb meem rau cov nyom.
1. Cov khoom siv saum npoo av:
Cov khoom siv saum npoo ntawm tus kheej cov kua nplaum ua lub luag haujlwm tseem ceeb hauv cov txheej txheem tuag-txiav. Cov ntaub ntawv sib txawv muaj cov khoom sib txawv uas cuam tshuam rau cov txheej txheem txiav. Muaj peb lub ntsiab lus: hom khoom siv saum npoo, the strength of the surface material, and the thickness of the surface material.
a) Surface material type:
The types of surface materials used in self-adhesive labels vary widely, and each material has unique characteristics that affect die-cutting, mainly including paper and film.
Daim Ntawv Lo Rau Ntawm Daim Ntawv Lo: Paper labels are commonly used and come in a variety of weights and finishes. Txawm li cas los, they are more prone to tearing or folding during the die-cutting process, especially if the paper is thin or fragile. When we analyze samples, we often see that some labels have burrs, which is caused by natural fracture due to the thick fibers of the material itself. Yog li ntawd, it is important to choose the proper paper thickness and quality for the intended application to ensure smooth die-cutting. Based on the die-cutting principle of paper materials, and considering the wear of the blade, the angle of the paper flattening blade is usually relatively large. Because the angle is large, the extrusion deformation of the material during die cutting is large, and the separation force in the horizontal direction facilitates the separation of materials.
Film labels: Films place higher demands on the die-cutting process than paper materials. Commonly used film self-adhesive surface materials mainly include: PE, PP, PE, polyolefin, PVC, PS, t, with durability, moisture resistance and chemical resistance. These materials are generally more flexible and less prone to tearing, making them suitable for intricate die-cut designs. Txawm li cas los, film labels are difficult to cut accurately due to their inherent elasticity or memory properties. For this reason, Cov hniav ntawm cov khoom siv tuag txiav zaj duab xis yuav tsum muaj lub ntsej muag ntse, qhov nyuaj siab, thiab lub kaum sab xis me me, feem ntau 37 ° txog 75 °. Lub kaum sab xis me me, tus hniav ntse dua thiab yooj yim dua nws yog qhov tuag txiav. Yog tias koj siv lub tuag-cutter nrog lub kaum sab xis loj, tsis tsuas yog nws nyuaj rau tuag-txiav, tab sis yog tias tus hniav tsis ntse, Cov khoom siv saum npoo yuav tsis raug txiav thiab daim ntawv hauv qab yuav tawg ua ntej, thiab ntug ntawm daim ntawv lo tiav yuav flanged. ua rau cov kua nplaum xau.
Hauv ntej, Qhov tseeb ntawm cov yeeb yaj kiab tuag yog ntau dua li cov ntaub ntawv ntawv, yog li cov ntaub ntawv tuag-txiav zaj duab xis muaj qee qhov kev xav tau rau cov khoom siv precision, tuag-txiav phaj precision thiab rov qab ntawv.
b) Lub zog ntawm cov khoom siv saum npoo:
Lub zog ntawm daim ntawv lo ntsej muag yog lwm qhov tseem ceeb uas cuam tshuam rau kev tuag txiav. Nws yog hais txog lub peev xwm ntawm cov khoom siv los tiv taus lub zog txiav los ntawm cov khoom siv tuag txiav. Ntawm no yog qee qhov kev xav txog:
Tsim kua muag tsis kam: Cov ntawv lo uas yuav tsum muaj kev tsim kua muag siab, xws li cov rau kev lag luam lossis sab nraum zoov, yuav tsum tau ua los ntawm cov khoom siv nrog lub zog txaus. Cov khoom siv xws li cov yeeb yaj kiab hluavtaws lossis cov ntawv ntxiv dag zog tuaj yeem muab qhov tsim nyog ntawm lub kua muag kom ntseeg tau tias huv, kev txiav meej thaum tuag txiav.
Shear Zog: Shear lub zog yog hais txog qhov tsis kam ntawm ib qho khoom siv rau kev txiav quab yuam parallel rau nws qhov chaw. Cov ntawv lo nrog lub zog txiav siab tsis tshua muaj kev warp lossis kua muag thaum lub sijhawm tuag-txiav txheej txiav. Xaiv cov khoom siv nrog lub zog txiav kom zoo yuav ua kom muaj tseeb thiab zoo ib yam tuag txiav cov txiaj ntsig.
c) Thickness ntawm cov khoom siv saum npoo:
Consistency in thickness is critical to ensure uniform depth of cut and prevent problems such as incomplete cuts or excessive cutting force. Labels with inconsistent material thickness can cause variations in the depth of cut, affecting the quality and appearance of the die-cut label. Ntxiv rau, the thickness of the material directly affects the depth of die-cutting. The thicker the material, the easier it is to die-cut, and vice versa, the thinner the die-cutting is, the more difficult it is.
Different die cutting equipment may have limitations on the maximum thickness of material they can handle. It is important to consider equipment specifications and select label materials within the recommended thickness range to ensure optimal die-cutting performance.
2. Self-adhesive material
There are two commonly used adhesives in self-adhesive materials: water latex and hot melt adhesive.
Water latex is composed of polymer particles dispersed in water, and the cohesive force is relatively easy to separate from the film. The hot melt adhesive is composed of rubber-like substances with high cohesion, and it is difficult to separate the adhesive films. Due to the strong fluidity of the hot-melt adhesive, if small text is printed on the surface of the adhesive layer, the adhesive will flow once the label has a small displacement during the subsequent compounding and die-cutting process, resulting in printing on it. The text on the screen is slightly shifted, distorted, or blurred. Ntxiv rau, hot melt adhesives are easily affected by temperature. Feem ntau, when the workshop temperature is lower than 15°C, the release force of the hot melt adhesive material will decrease rapidly. Yog li ntawd, in winter, hot melt adhesive materials are particularly prone to the problem of die-cut flying marks.
Yog li ntawd, it is recommended that label printing companies try not to choose hot-melt adhesive materials with strong fluidity, but choose water-sol materials with relatively weak fluidity. At the same time, even if you choose a hydrosol material, you must also pay attention to the coating thickness of the adhesive layer. Because whether it is hot melt adhesive or hydrosol material, if the adhesive coating is too thick, it may cause the adhesive to flow slightly, causing the small text printed on it to be deformed.
3. The equipment itself
The precision and alignment of a die cutter is critical to achieving precise and consistent cuts. The machine should be properly calibrated and aligned to ensure proper positioning of the cutting tool and label stock. Misalignment issues can result in incomplete cuts, irregular shapes, or misaligned labels, which can affect the overall quality of the finished label. Regular maintenance and adjustment of the machine and adherence to the manufacturer’s recommendations are necessary to maintain optimum accuracy and alignment.
Kuj, the cut pressure and speed settings on the die cutter need to be adjusted appropriately for the specific label stock and adhesive being used. Insufficient cutting pressure may result in an incomplete cut or difficulty separating the label from the liner. Excessive cutting pressure can deform, tear or damage labels. Likewise, cutting speed needs to be optimized to ensure clean cuts without compromising accuracy. Proper calibration of cutting pressure and speed parameters based on label material and adhesive properties is critical to achieving consistent and high-quality die-cutting results.
The quality and condition of the cutting tools used in a die-cutter has a major impact on the die-cutting process. Dull or damaged cutting blades can result in poor cut quality, increased cutting force requirements, or damage to label material. Regular inspection and maintenance of cutting tools, including changing blades when necessary, is essential to ensure optimal cutting performance. Using a quality blade and considering the specific blade design for the label material being used can also improve overall die-cutting efficiency and accuracy.
By considering these aspects and implementing suggested solutions, manufacturers can overcome die-cutting challenges and achieve consistent, precise and high-quality self-adhesive labels. Collaboration with material suppliers, adhesive manufacturers, mold designers and equipment experts can also provide valuable insight and support for optimizing the die-cutting process. Through attention to detail and continuous improvement, manufacturers can ensure efficient production and meet the needs of a variety of labeling applications.
