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| Companies and Technologies |
Reheat stretch blow molding
- Made in Taiwan
- High quality machines and molds
Preform injection molding
- Made in China
- Excellent outputs and quality at lower cost
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| Reheat Stretch Blow Machines |
- There are three types of machines:
- Linear shuttle machines: 1 up to 6 cavities
- small and medium output at low cost
- Linear rnachines with continuous preform motion: 1 to 12 cavities
- Even heat distribution and easy operation
- Rotary machines: 10 and 14 cavities
- High output at a lower cost
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| Machine Features Linear Shuttle Machines |
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- Gaylord tipper
- Preform hopper
- lncline conveyor
- Unscrambler
- Machine in - feed
- Oven section
- Blow clamp
- Out - feed
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PET-ALL Manufacturing |
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| Machine Features continued |
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- Preforms spin on mandrels
- Preforms are heated with infrared lamps
- Preforms are placed in blow molds as groups
(2,3,4, or 6)
- Preforms are stretched and blown
- Machine out - feed
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| Range of Linear Shuttle Machines |
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- 1 to 6 cavities
- Most widely used machine type for small to medium sized applications
- Outputs from 1,000 to 8,400 b/h with all - electric model
- Neck sizes from 30 to 200 mm
- Volumes from 50 ml to 5 gallons
- Heat set, thread orientation, and preferential heating available on some models
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| Benefits and lssues of Linear Shuttle Machines |
- Shuttle means that the movement through the ovens is 'go - and stop'
- + Low capital investment
- + Easy setup
- Preform heat Iess even than continuous motion machines; to compensate Chumpower machines allow the adjustment of blow parameters for individual cavities
- Spacing in ovens is the same as in blow mold - this is not as efficient as more air is heated up and escapes
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| Chumpower Acronyms |
- CPSB: Chumpower Stretch Blow
- T: Standard
- Number: Number of cavities times 1,000 (except in rotary and LS machines)
- L: Large container
- W: Wide Mouth
- H: Heat - Set
- H: Rotary
- SS: Small Size (0.6 I maximum)
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| CONTINUOUS MOTION, ALL ELECTRIC, RHSB |
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| LS – 6000 |
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- This linear rnachine is different in several ways:
- In - feed is like a rotary machine with star wheels:
- proven concept with high reliability
- Movement of preforms through the ovens is
- continuous: even heat for all preforms
- Spacing in ovens is fixed depending on model;
- preforms are then spread to blow mold pitch: batter use
- of ovens, energy savings
- Servo motor clamp: fast and reliable
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| Design layout |
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- Compact design
- Space savings
- Easy access
- Easy maintenance
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| Infeed |
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- Compact design
- Space savings
- Easy access
- Easy maintenance
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| Heating section |
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- Modular ovens with easy access
- 50 mm perform spacing for best energy usage
- Performs are always right side up eliminating turn – over problems, chain wear etc.
- 2 x 3 ovens layout with turnaround section for equalization of perform temperature
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| Oven Details |
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- Chumpower lamp spacing is 17 mm {155mm on request)
- Lamps can be moved
- 6 to 16 lamps per oven
- Each lamp can be turned on or off
- Heat shield is watercooled
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| Pitch Changing Unit |
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- Preform transport and pitch unit are both controlled by servo motors
- Pitch unit grabs preforms, then moves them towards blow clamp and enlarges the pitch to blowing dimension
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| Clamp Unit |
- Toggle clamp triggered by cam
- Cam controlled by servo motor
- Cam rotates continuously in one direction greatly reducing vibration
- Patented design
- Stretch rod is servo motor controlled
- Each cavity has its own set of blow valves allowing individual control and reducing air consumption
- Blow nozzle seals on transfer ring - no neck deformation
- Bottom insert movement is mechanically coupled to clamp
- Pressure compensation reduces bottle parting line and mold wear
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* New: All speeds now increased from 1500 to 1700 parts/hour per cavity.
* CPSB LSS 12000 now available (12 cavity) at 20,000 + parts/hour. (0.61.) |
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| Rotary Machines |
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- CP offers a 10 - cavity machine at this time
- There are 4 models:
- CPSBR - 10 - 36: Max. neck 28 mm, oven pitch 38 mm
- CPSBR - 10 - 50: Max neck 43 mm, oven pitch 50 mm
- Both machines have a maximum output of 14,000 b/h
- CPSBH - 10 - 38H; Same as above for heat - set
- CPSBH - 10 - 50H: Same as above for heat - set
- Heat set machine output is 10,000 b/h
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| Benefits of Rotary Machines |
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- Every preform is exposed to the exact same amount
of heat and time between heating end blowing
- Small oven pitch allows efficient heating
- Synchronization is mechanical and, once set, very
repeatable
- Low dead - volume of sir means lower air consumption
- In - feed end out - feed are both mechanical and not
prone to failure.
- Pressure compensation means Iess stress on mold
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| Chain Pitch in Ovens |
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- In indexing machines pitch of mandrels in the
ovens is the same as in blow mold "4"
- Ovens are not loaded optimally
- Large necks possible
- In rotary and LS - 6000 machine pitch is either 38
or 50 mm
- Energy savings due to better oven usage
- Neck size limited by pitch: transfer ring must be 1.5
mm smaller than pitch
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| Compressors |
- Blow machines need 30 to 40 bar (420 to 580 psi) air pressure
- Compressor is by far the most expensive ancillary equipment for stretch blow molding
- PET All compressors use a Chinese supplier that came out of lngersoll - Rand as the best
compromise between low cost and reliability
- These compressors are modular. Single unite of 20 to 40 cfm are stacked together to form larger systems that can easily be expanded
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| "Please click on the below brochure FOR MORE INFORMATION" |
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