Failure name
Causes and Countermeasures
The hot stamping layer is loosely bonded to the substrate and can easily peel off
(1) The material of the foil adhesive does not match the material of the substrate. The foil type should be changed.
(2) There are mold release agents, abrasives, dust, fingerprints, and oil stains on the surface of the product. Wipe the surface of the product with a solvent such as alcohol.
(3) The hot stamping temperature is too low. Should be properly increased.
(4) The hot stamping pressure is too small. Should be properly increased.
(5) Hot stamping time is too short. Should be extended appropriately.
(6) The foil expired and the adhesive failed. New foils should be used instead of expired hot foils.
(7) The surface of the hot stamping surface has ribs or other structures with different heights, resulting in uneven stamping pressure. The hollow part should be supported from the inner side of the product to keep the pressure of the hot stamping surface uniform
Stamping layer coking color
(1) The hot stamping temperature is too high. Should be reduced appropriately.
(2) Heaters such as rubber sheets, stampers, and rollers are too close to the hot stamp foil. The distance between the heating body and the hot stamp foil should be appropriately increased.
(3) Hot stamping time is too long. Should be shortened appropriately
The surface of the hot stamping layer is dark and dark
(1) Hot stamping temperature is high. Should be reduced appropriately.
(2) Long hot stamping time. Should be shortened appropriately.
(3) The distance between the stamping foil and the heating body is too small. Should increase appropriately
Hot stamping wrinkles
Door) rubber pull, India touch, rubber roller and hot stamping foil too close. Should take the appropriate distance.
(2) The temperature of the rubber plate, impression and rubber roller is too high. Should be reduced appropriately.
(3) The openings of the products, such as the window holes, are not covered with tires, and the stamping pressure is not uniform. The hollow part of the product should be cushioned so that the hot stamping pressure can be maintained evenly.
(4) Hot stamping foils are not smooth enough. Check the foil feeding device.
(5) The surface tension of hot stamping foil is too small. Should increase the tension properly, tighten the stamping foil
Partial leaking foil leaks and surface spots
(1) There are oil and dust on the surface of the product. Use alcohol to wipe the surface of the product and remove oil, dirt, etc.
(2) The product surface has bubbles, shrinkage, and severe surface silver forming failure. Should take measures to solve the product in the molding process.
(3) The quality of the release agent on the surface of the hot stamping foil is too bad and the detachment is poor. Replace the hot stamp foil with better release.
(4) There are burrs on the surface of the product. Surface burrs should be removed.
(5) Defective tire fixture. The support is poor and the stamping pressure is not balanced. The structure of the tire holder should be improved and the pressure on the hot stamping surface should be adjusted. Make (6) hot stamping temperature uneven or low temperature. The stamping temperature should be properly adjusted and the position of the rubber roller should be moved. For the places where the foil is missing, the sanding can be smoothed, followed by reheating or local ironing.
Hot stamping product cracking
(1) poor tire support, local stress concentration. The tire holder structure should be improved so that the hot stamping surface is evenly stressed.
(2) Hot stamping pressure is too high. Should be reduced appropriately.
(3) There are obvious molding defects such as weld marks and stream marks on the hot stamping surface. Targeted adjustment of the molding process of the product
Hot stamping surface deformation
(1) The hot stamping temperature is too high. Should be reduced appropriately.
(2) Hot stamping pressure is too high. Should be reduced appropriately.
(3) Bad positioning during hot stamping. Correct the positioning.
(4) The design of hot stamping parts is unreasonable. When designing, hot stamping products should have the following structural features:
(5) Shaped raised products, raised height not less than 0.8m.
Hot stamping surface deformation
(1) The width of the raised rib is not less than 0.25mm. When possible, the top surface of the rib can be made slightly convex. 1mm shape.
(2) The distance between the ribs on the bottom of the product and the side walls is not less than 6 nm.
(3) The minimum distance between the ribs and the side wall at the bottom of the inclined side of the product is 1.5 mm.
(4) When several ribs are hot stamped with several colors, the distance between the ribs is not less than lmm
Source: China Plastics
