Blow‑Molding Equipment
Blow‑Molding Equipment
Multiple domestic factories for bidding. Free promotion. Price to be negotiated between winning bidder and buyer.
Please provide below information for posting:
- New or used; 2. Model or functional requirements; 3. Type of raw material; 4. Number of mold cavities; 5. Bottle volume; 6. Production output; 7. Purchase quantity
表格
| Type | Working Principle | Core Advantages | Main Limitations | Typical Applications |
|---|---|---|---|---|
| Semi‑Automatic Blow‑Molding Machine | Manually place pre‑heated preforms into blow molds; the machine completes bottle‑blowing actions. | Low investment cost, compact footprint; suitable for low‑volume diversified production; produces wide‑mouth bottles and large containers from 50 ml up to 20 L. | Manual operation required, low productivity; not fit for mass‑volume production. | Small‑batch production, sample trial manufacturing, frequent specification change‑over scenarios. |
| Fully‑Automatic Blow‑Molding Machine | Robots automatically complete preform feeding, heating, blow‑molding and bottle take‑out in full cycles. | Extremely high productivity (2‑cavity, 6‑cavity and more); finished‑product yield above 99.5 %; energy saving by 10‑60 % versus conventional models. | High capital investment; high requirements for operation and maintenance skills. | Mass‑production of standardized articles such as beverage bottles, food containers and pharmaceutical packaging. |
Core Technical Specifications: Key Indicators for Equipment Selection
After confirming equipment type, select proper specifications with following critical parameters:
Number of mold cavities: Core factor determining productivity. Common configurations: 2‑cavity, 4‑cavity, 6‑cavity, 12‑cavity and more. More cavities deliver higher hourly output.
Product volume range (ml or L): Bottling capacity range supported by equipment. Ranges from 1 ml micro‑bottles up to 10000 L large storage tanks; mainstream models cover 10 ml‑20 L.
Production capacity (bottles per hour): Direct indicator of throughput. ‑ Semi‑automatic / small‑size machine: 600‑2400 bottles/h ‑ Fully‑automatic medium‑speed machine: 3200‑4000 bottles/h (4‑cavity) ‑ High‑end rotary‑type machine: single‑cavity output up to 3000 bottles/h; total machine output up to 108000 bottles/h
Blow‑molding pressure (MPa): Process parameter affecting molding quality. ‑ Conventional PET bottles: 2.5‑4.0 MPa (25‑40 bar); 3.5‑4.0 MPa most commonly adopted. ‑ Thick‑wall or large‑size industrial drums: 30 bar or above. ‑ High‑pressure blowing tolerance: ±0.1 MPa.
Applicable raw materials: ‑ Extrusion blow‑molding: PE, PP, PS, PVC etc. ‑ Injection / stretch‑blow‑molding: PET as dominant material; also compatible with high‑grade materials including PC, PP, PPSU, Tritan, PETG.
Heating power & temperature‑control accuracy: Affect heating efficiency and preform temperature uniformity. ‑ For blow‑fill‑spin integrated machines: temperature deviation at identical mold positions ≤±1.5 ℃. ‑ High‑end one‑step machines adopt closed‑loop temperature control to avoid internal‑stress accumulation.
Clamping force (kN): Capability of mold‑closing mechanism to resist blowing pressure, influencing forming quality.
Finished‑product yield: Comprehensive indicator for equipment stability. ‑ Industry requirement: ≥99.2 %. ‑ Premium equipment: ≥99.5 %.
Selection Guidelines
Follow clear logic for blow‑molding equipment selection:
Determine process according to finished‑product characteristics ‑ Large containers (>5 L), complex‑shape parts or multi‑layer structures: choose extrusion blow‑molding machines. ‑ Small precision bottles (<500 ml) with strict neck‑dimension requirements: choose injection blow‑molding machines. ‑ PET beverage bottles requiring high strength and transparency: adopt stretch blow‑molding (injection‑stretch‑blow for nearly all PET applications).
Select one‑step or two‑step process by raw‑material grade ‑ For high‑grade materials such as PPSU baby bottles, Tritan water cups and PETG high‑transparency cosmetic bottles, or superior surface gloss requirements: one‑step process is preferred. ‑ For ordinary PET water bottles and carbonated‑drink bottles pursuing maximum productivity and flexible supply‑chain: two‑step process is mainstream.
Define automation grade and cavity quantity based on output ‑ Low‑volume multi‑variant production: semi‑automatic machine or small‑size fully‑automatic unit. ‑ Medium‑volume production: 2‑cavity or 4‑cavity fully‑automatic machine. ‑ Mass‑volume standardized production: 6‑cavity, 12‑cavity or high‑speed rotary machine; prioritize integrated units such as blow‑fill‑spin machines to lower operating costs.
Adopt precision‑control components according to quality requirements ‑ High wall‑thickness uniformity requirement: equip multi‑point parison wall‑thickness control system. ‑ Energy‑saving demand: consider full‑electric or servo‑driven models.
Consider mold matching and after‑sales service: Blow‑molding is a trinity technology combining equipment, molds and process. Suppliers with rich mold‑making experience and process‑debugging capability are highly recommended.
Participation Process
Manufacturers: Contact supplier service for supply registration.
Buyers: Click group‑purchase or contact procurement service to submit requirements. The platform filters suppliers from database or releases bidding based on aggregated demands. Buyers select competitive suppliers and sign sales contracts.
