Replacement Cycle of Blade & Die for High‑Speed Hot‑Seal Hot‑Cut T‑Shirt Bag Making Machinehttps://www.mfglovemachinery.com/bag-making-machine/pe-carry-t-shirt-bag-machine.html
There are two main sets of dies on the machine: hot‑seal & hot‑cut blade and T‑shirt handle punching die. There is no fixed replacement interval. The service life largely depends on production hours, film material and daily maintenance. Below are practical reference values from real‑world factory operations.
1,Hot‑Seal & Hot‑Cut Blade
Function: Bag sealing and cutting
For high‑quality alloy steel blade with Teflon coating: 8‑10 months under 24‑hour full‑load continuous production; 12‑18 months for 8‑hour daily operation with proper maintenance. For ordinary‑material blades with frequent plastic sticking and excessive heating temperature, cutting edges may get damaged within 3‑6 months.
√ Replacement is not always required. If you get fuzzy sealing edges, stringing or weak sealing performance, the blade can be disassembled for resharpening. Replace it only when chipping or deformation occurs. Clean plastic residue on blade surface after cooling down every day to greatly extend its service life.
2,T‑Shirt Handle Punching Die
Function: Punch U‑shaped handle holes for vest bags, high‑frequency impact wearing part
3‑6 months under 24‑hour high‑speed continuous production; 6‑12 months for 8‑hour daily operation.
Signs of dull punch edge: burrs on handle holes, incomplete cutting and tearing at hole corners.
Tip: Only replace the punch pin instead of the whole die base to cut spare‑part costs.
3,Teflon High‑Temperature Fabric
It is not a die but a fast‑consuming isolating accessory fitted on hot blades. Normal service cycle: 1‑3 months. If plastic sticking occurs frequently, service life may be shortened to 2‑4 weeks. Replace it immediately once it is damaged, blackened or heavily stuck with plastic.
♦ Key Factors Affecting Die Service Life
Production load: 24‑hour non‑stop operation causes much heavier wear than intermittent production; higher running speed brings higher wear.
Film raw material: Recycled PE film with impurities accelerates edge wear; virgin pellet material causes less wear.
Daily maintenance: Clean plastic residue on blades daily; avoid hard impact on hot blades; do not set excessive heating temperature.
Die material: High‑speed steel and tungsten‑coated dies have much longer service life than ordinary carbon‑steel dies.
♦Judge resharpening or replacement by actual symptoms rather than fixed time Signs for hot‑seal & hot‑cut blade maintenance: Stringing and burrs on cutting edge, weak sealing that can be easily torn apart, chipping or uneven deformation on blade surface.
Signs for punching die maintenance: Burrs around handle holes, incomplete cutting, punching position offset and punch pin chipping.
