80mm screw fully automatic servo hydraulic blow molding machine, 2 stations, 6 cavities, used to produce small bottles or small hollow plastic products

Q: How to choose between fully‑automatic and semi‑automatic blow molding machines?

A: Choose semi‑automatic for small‑batch production, limited budget and frequently‑changed product specifications. Choose fully‑automatic for mass‑volume production, labor saving and stable continuous output. A semi‑automatic machine requires 1‑2 workers for part taking and trimming, while the fully‑automatic model supports near‑unmanned operation.

Q: What products are suitable for accumulator‑head blow molding machines?

A: It is mainly used for large‑capacity hollow articles, such as 20L‑200L chemical drums, water tanks, amusement parts and automotive plastic components. It fits heavy‑weight thick‑wall products which ordinary machines cannot produce.

Q: What plastic materials can the blow molding machine process?

A: Main materials: HDPE, PP. Some models support LDPE and EVA. For PET bottles, injection‑blow integrated machines are recommended; ordinary hollow blow molding machines are not ideal for PET processing.

Q: What auxiliary machines are required for a blow molding unit?

A: Chiller, screw air compressor, auto loader, material mixer and plastic crusher. Optional equipment includes mold temperature controller and material dryer based on raw materials and output requirements.

Q: Which machine is suitable for 1‑5L plastic bottles?

A: Medium‑small fully‑automatic blow molding machines are recommended for 1‑5L daily‑chemical bottles and oil bottles. Multi‑cavity molds can be matched to improve production capacity.

Q: What causes uneven wall thickness of finished parts?

A: ① Improper die head gap adjustment; ② Unstable parison extrusion speed; ③ Raw material temperature fluctuation; ④ Inconsistent mold cooling performance; ⑤ Unstable extrusion pressure of accumulator head.

Q: How to solve air‑bubble defects on blow‑molded products?

A: Dry damp raw materials; reduce barrel temperature to avoid material decomposition; check screw compression ratio; remove moisture and impurities inside raw materials.

Q: Obvious parting line and large flash on products, how to fix?

A: Insufficient clamping force; worn mold parting surface; excessive clearance of clamping mechanism; excessive parison material volume.

Q: Products cannot be fully blown out or have local depressions?

A: Insufficient blowing air pressure; blocked blowing nozzle; over‑fast mold cooling; too‑short parison; blocked mold exhaust holes.

Q: Difficult demolding, plastic sticking to mold cavity?

A: Excessively high mold temperature; insufficient draft angle; rough mold cavity surface; over‑high raw material temperature; appropriate release agent can be added.

Q: What pre‑start‑up inspections shall be done for new machines?

A: Check hydraulic oil level, air compressor pressure and chiller water circulation; confirm mold fastening; keep heating zones at target temperature for 30‑minute heat preservation; perform dry clamping test before feeding raw materials.

Q: What to do if hydraulic oil temperature is too high?

A: Check cooling performance of chiller; replace aged hydraulic oil; reduce excessive relief‑valve pressure; avoid long‑time non‑stop running. Replace hydraulic oil periodically.

Q: Daily maintenance for screw and barrel?

A: Clean barrel thoroughly when switching raw materials; lower temperature for long‑time shutdown; prevent metal hard objects from entering feeding port to avoid screw scratch; inspect wear clearance regularly.

Q: How often to sharpen crusher blades?

A: Inspect blades every 2‑3 months under normal production. Sharpen blunt blades timely. Over‑large crushed particles will harm finished product quality.

Q: Frequent alarm of chiller, root causes?

A: Filter blocked by impurities in cooling water; insufficient water level; dust‑covered condenser; excessive ambient temperature; blocked circulating pipeline.

Q: What is your machine lead time?

A: 30‑45 working days for standard models; 45‑60 working days for customized and accumulator‑head models, excluding sea freight time.

Q: Can the machine match our local voltage?

A: Yes. Voltage and frequency can be customized according to clients’ local power grid for motors and electric control system.

Q: Do you supply molds? What is mold service life?

A: Custom‑developed molds are available. Aluminum alloy molds: hundreds of thousands shots; steel molds: more than one million shots, subject to products and raw materials.

Q: What services are included for exported machines?

A: Pre‑shipment inspection & testing; English operation manual; remote video guidance for installation & commissioning; oversea on‑site technical service available (travel expenses borne by buyer); lifetime technical after‑sales support.

Q: What is the warranty period?

A: 12‑month whole‑machine warranty. Wearing parts (blades, sealing rings, heater bands) are excluded from warranty. Original spare parts can be supplied continuously after warranty expiration.

Q: How much floor space does the machine need? How large workshop is required?

A: Medium‑small fully‑automatic machine occupies about 6‑10 ㎡. Large accumulator‑head machines need larger space. Extra space shall be reserved for auxiliary machines and finished‑goods turnover. You may send your site dimension for our layout suggestion.