Detaljeret forklaring af adskillige strippestrukturer af stemplingdiser i stemplingsprocessen, strippestrukturen er et nøglesign for at sikre, at stemplingsdele og affaldsmaterialer kan adskilles glat fra matricen. Forskellige strippemetoder påvirker direkte produktionseffektivitet, die liv og produktkvalitet. Følgende er almindelige strippestrukturer og deres tekniske egenskaber i stemplingdies: 1. fast stripperplade (fast stripperplade) strukturelt princip: den stive stripperplade er fastgjort på matrisen eller skabelonen og opretholder et fast hul med stansen (normalt 1. 5-2 gange den materielle tykkelse). Materialet presses under stempling, og stripperpladen tvinger det materiale, der skal strippes under returslaget. Anvendelige scenarier: tyk pladetæpper (pladetykkelse større end eller lig med 1,5 mm) højpræcisionsstansning (såsom motorisk siliciumstålplade) Roughing Station of Progressive Die Fordages: Simple Structure, Strong Rividity, Intet elastisk komponenttab. Stabil strippekraft, der er egnet til stempling med høj hastighed (større end eller lig med 500 gange/minut). Ulemper: Kan ikke flade materialet ud, tilbøjelig til at fordrive. Følsom over for svingninger i materialetykkelser, præcis kontrol af kløften er påkrævet. Designpunkter: ensidig clearance mellem stripperpladen og stansen: C=(1,5∼2) × T
(t er den materielle tykkelse). Vejledningen på guide -stiften skal være større end eller lig med 1,5 gange stansediameteren for at forhindre excentrisk belastning. 2. Elastisk stripper -strukturelt princip: Den elastiske kraft leveres af fjedre, polyurethan gummi eller nitrogenfjedre for at trykke på materialet under stemplingsprocessen, og materialet frigøres elastisk, efter at slagtilfælde er afsluttet. Typisk struktur: fjederstripperplade, losning af gummipad, losning af nitrogenfjeder. Anvendelige scenarier: Stempling af tynd plades (pladetykkelse mindre end eller lig med 1 mm, såsom mobiltelefon metalskal) præcisionsblukning af bøjning og strækningsprocesser, der kræver presning for at forhindre rynker (såsom forbindelsesterminaler) fordele: dobbeltfunktioner ved at presse og losse for at forhindre materiel bevægelse og deformation. Tilpas til svingninger i materialetykkelser og har stærk fejltolerance. Ulemper: Elastiske komponenter er tilbøjelige til træthed (forårslivet er omkring 500, 000 gange, polyurethan er omkring 300, 000 gange). Højhastighedsstempling kan forårsage ufuldstændig losning på grund af hystereseffekt. Designpunkter
Polyurethan -gummikomprimering er mindre end eller lig med 30% for at undgå for tidlig aldring.
3. ejektorsystem Strukturelt princip: Brug ejektor, ejektorplade eller pneumatisk skubbestang til at skubbe de stemplede dele ud af matrisen. Almindelige typer: Mekanisk ejektor (stangkobling), pneumatisk ejektor, hydraulisk ejektor. Anvendelige scenarier: Demolding af dybtegnede dele (såsom rustfrit stålkopper), dele med komplekse former (let at sidde fast i matrisen), automatiserede produktionslinjer (samarbejder med manipulatorer) fordele: stor og kontrollerbar udkastkraft (pneumatiske/hydrauliske systemer kan nå flere tons træk). Udkast timingen kan kontrolleres nøjagtigt for at undgå deformation af dele. Ulemper: Kompleks struktur og stor skimmelpladsbeskæftigelse. Pneumatiske/hydrauliske systemer øger vedligeholdelsesomkostningerne. Designpunkter: Brejsedistributionen skal undgå produktfunktionelle områder (såsom forseglingsoverflader).
4. Pneumatic assisted demolding (Air Blow-off) Structural principle: A compressed air nozzle is set in the mold, and air is blown to assist the parts or waste to be detached at the moment of mold opening. Often used in conjunction with the ejector. Applicable scenarios: lightweight thin-walled parts (such as aluminum foil parts) products with high surface requirements (avoiding contact marks of ejector pins) stations where small waste is difficult to discharge (such as micro-hole punching) Advantages: non-contact stripping to avoid scratches on parts. Directional removal of dead corner waste. Disadvantages: dependent on stable air source, high energy consumption. Noise is high, and a muffler needs to be installed. Design points: nozzle aperture: 0.5-2mm, air pressure 0.4-0.6MPa. Injection angle 30°-45° to avoid airflow directly hitting the mold cavity. 5. Scrap Cutter Structural principle: a cutter is set at the end of the progressive die to divide the continuous waste into small segments for easy collection. It is divided into upper cutting, lower cutting and side cutting. Applicable scenarios: high-speed progressive die (such as electronic connector production) stamping line with high risk of waste winding long strip waste processing (such as heat sink punching) Advantages: prevent waste accumulation from causing mold jamming. Improve the operation stability of the automation line. Disadvantages: Increase mold complexity and blade wear points. The cutting knife needs regular maintenance (lifespan of about 1 million times). Design points: Cutting knife angle: 30°-45°, reduce shear force. Waste length: generally ≤200mm, too long and easy to sag and get stuck. 6. Combined Stripping Structure (Combined Stripping) Structural principle: combined elastic unloading + ejector device + pneumatic assistance, multi-stage collaborative stripping. For example: first stripping by the elastic unloading plate, then ejected by the ejector rod, and finally cleared by air blowing. Applicable scenarios: ultra-thin materials (t≤0.1mm, such as copper foil shielding cover) High viscosity materials (such as silicone gaskets) Micro parts stamping (such as medical needles) Advantages: Thorough stripping, adaptable to extreme working conditions. Redundant design improves reliability. Disadvantages: Complex structure, mold cost increased by 30%-50%. The timing of multi-mechanism action needs to be precisely controlled. Selection Recommendation Table Stripping Structure Applicable Plate Thickness Speed Accuracy Maintenance Cost Fixed Stripper ≥1.5mm Very High (>5 0 0spm) Medium Low Elastic Stripper 0. 2-1. 5mm høj ({4}} SPM) High Medium Ejector Ethvert medium (<200spm) Very High High Pneumatic Assist ≤0.5mm Very High Very High High Scrap Cutting Knife Any High Low Low Composite Stripper Structure ≤0.2mm Medium Very High Very High Summary The design of the stripper structure needs to comprehensively consider four factors: material properties, stamping speed, precision requirements, and cost budget: High-speed stamping of thick plates: fixed stripper plates are preferred, supplemented by scrap cutting knives. High-precision punching of thin plates: elastic stripper + pneumatic assistance is the golden combination. Deep drawing complex parts: ejector + elastic stripper plate double protection. Micro-stamping extreme working conditions: composite stripper structure is the only choice. Future trends: Technologies such as intelligent stripping systems (such as pressure sensors that provide real-time feedback to adjust the ejector force) and self-lubricating stripping plates (with the life of graphene coating increased by 5 times) will further improve stripping efficiency and reliability.
