TECHNICAL WIKI · 2026 EDITION

Adhesive Coating Machine Ultimate Guide

Complete resource covering working principle, coating methods (slot die, roll, spray, gravure), technical specs, industrial applications, and selection for tape, label, hygiene, packaging & automotive industries.

coating defect

A coating defect is any imperfection in the applied adhesive layer that degrades product quality, performance, or appearance. Common defects include streaks (linear variations due to die scratches or contamination), pinholes (air entrapment or particles), bubbles (blisters from rapid drying), orange peel (poor leveling due to high viscosity), edge beads (thicker edges from surface tension), and missing coating (skips from web flutter or pump pulsation). Defects originate from equipment (worn rolls, dirty dies), process (incorrect temperature, speed, gap), or raw materials (gels, contaminants). Detection uses inline vision systems and coat weight gauges. Prevention involves regular cleaning, precise control, and filtration. Troubleshooting requires systematic root cause analysis using fishbone diagrams and data correlation. Defects increase scrap and customer complaints. Corrective actions include adjusting parameters, cleaning components, or changing materials. A robust quality management system with SPC and defect tracking is essential for minimizing defects and ensuring product consistency.

Adhesive coating machine
Adhesive coating machine


Khuyết tật phủ là bất kỳ lỗi nào trên lớp keo. Gồm vệt (do xước khuôn), lỗ kim (không khí), bong bóng (sấy nhanh), vỏ cam (độ nhớt cao), hạt mép (sức căng bề mặt), thiếu phủ (rung). Nguyên nhân từ thiết bị, quy trình, nguyên liệu. Phát hiện bằng camera và máy đo. Phòng ngừa vệ sinh, kiểm soát, lọc. Khắc phục bằng phân tích nguyên nhân. Tăng phế liệu. Hành động sửa chữa: điều chỉnh thông số, vệ sinh, thay vật liệu. SPC và theo dõi lỗi là cần thiết.

Een coatingdefect is elke onvolkomenheid in de aangebrachte lijmlaag. Veelvoorkomend: strepen (krassen), gaatjes (luchtinsluiting), bellen (te snel drogen), sinaasappelhuid (hoge viscositeit), randkralen (oppervlaktespanning), ontbrekende coating (fladderen). Oorzaken: apparatuur, proces, grondstoffen. Detectie met camerasystemen en laaggewichtmeters. Preventie door reiniging, controle, filtratie. Oplossing via worteloorzaakanalyse. Verhoogt afval. Corrigerende maatregelen: parameters aanpassen, reinigen, materialen wijzigen. SPC en defectregistratie zijn essentieel.

আবরণ ত্রুটি হল প্রয়োগকৃত আঠালো স্তরের যেকোনো অপূর্ণতা যা পণ্যের গুণমানকে ক্ষতিগ্রস্ত করে। সাধারণ ত্রুটি: দাগ, পিনহোল, বুদবুদ, কমলার খোসা, প্রান্ত পুঁতি, অনুপস্থিত আবরণ। কারণ: সরঞ্জাম, প্রক্রিয়া, কাঁচামাল। ইনলাইন ভিশন এবং গেজ দিয়ে সনাক্তকরণ। প্রতিরোধ: নিয়মিত পরিষ্কার, সুনির্দিষ্ট নিয়ন্ত্রণ, পরিস্রাবণ। সমস্যা সমাধান: মূল কারণ বিশ্লেষণ। ত্রুটি বর্জ্য বাড়ায়। সংশোধনী পদক্ষেপ: পরামিতি সমন্বয়, পরিষ্কার, উপাদান পরিবর্তন। এসপিসি এবং ত্রুটি ট্র্যাকিং অপরিহার্য।
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