PP Plastic Preform Injection Mold

• Shaping Mode: Injection Mould
• Surface Finish Process: Mirror Polishing
• Mould Cavity: Multi Cavity
• Model NO.: 16-48cav
• Plastic Material: PP
• Process Combination Type: Compound Die
• Application: Household Appliances, Commodity, Home Use
• Runner: Hot Runner
• Design Software: UG
• Installation: Fixed
• Certification: CE, ISO, FDA
• Standard: PUNCH
• Customized: Customized
• Transport Package: Internation Standard Package
• Specification: 16-48cav
• Trademark: staonepackage
• Origin: China
• HS Code: 8480719090
• Production Capacity: 500set/Year

Product Description

 

	Question	Answer
1	Warranty of the molds	5 million shots
2	Stainless Steel Material of core	S136 (Brand : ASSAB)
3	Stainless Steel Material of plates	420
4	Hardness of core	HRC50~52
5	Hardness of cavity	HRC50~52
6	Hardness of neck ring(thread splits)	HRC50~52
7	Hardness of mold base	HRC35~38
8	Hot Runner system	It is researched and developed by our itself with consulting from European PET mold expert, adopting the international famous brand components, such as Heater (Brand : hotset ,Nozzle Heater (Brand : RNA, Canada), Plastic cap-insulator (Brand: DUPONT CHEMICAL, USA, withstands 350 Degree C), valve-stem(Material : SKD61, Brand : PUNCH, Japan))
9	Number of cooling zones	Both of core plate and cavity plate adopt the central centralized water cooling system Core Plate: Water connector : 1pc entries cooling water 1pc outlets cooling water Cavity plate : Water connector : 1pc entries cooling water 1pc outlets cooling water
10	Cycle time (estimated)	Based on final preform wall thickness, preform shape, customer's machine injection process and PET resin's IV etc
11	Cooling time	Based on final preform wall thickness, preform shape, customer's machine injection process and PET resin's IV etc
12	Indicate spare parts	Standard spare parts kits
14	Number of points to be controlled (heating and/or thermocouples)	Main-runner:  1 point temperature control 1 zone. Sub-runner: each points voltage controlled mode,  1 point control the copper nozzles of each  cavities

Hot-half Mold features
Hot-runner channels have the top engineering in balance design;
Main parts of hot-half mold such as heaters, valve-stems are imported from Europe;
Drops are controlled individually and heating zone temperatures are adjustable, AA value from thermal degradation is minimized.

1.Hot Runner components
Imported from EUROPE and Italy, which is interchangeable with international leading brand mold makers from Canada



2.Hot-runner design

Manifold use rational balance design, each mold design is calculated by professional mold flow software;
Inner tunnel diameter size is different according to different flow rate require;
3.Preform Acceptance Criteria

Attribute

Specification

1. Thread tolerances

 

Thread tolerances are as per the International Society of Beverage Technologists "ISBT" standards. If the thread finish type is not within the ISBT standards, tolerances will be based on us approved preform drawing.
All ISBT standards can be viewed at stonepackage.en.made-in-china.com

2) Thread dimensions inspected
(Coca China only check  E, T, D, ID, "A" points dimension and calculation for these five points shall be>1.33)

Standard dimensions inspected are as per the drawing shown
 

3) Individual preform weight     variation from nominal(used minus tolerance)
 

Nominal weight

Tolerance

Less than 20g

± 0.2 g

20g to 35g

± 0.3 g

Greater than 35g to 50g

± 0.3 g  

Greater than 50g

± 1 %

4) Maximum allowable weight variation between preforms in one shot.
On an Index system, one shot is defined as a "single" face of the mold.

Nominal Weight

Tolerance

Less than 35g

0.2g
 

35g to60g

 (≤0.3g)

Greater than 60g

 (0.5%×preform weight)

5) Wall thickness variation
 

  Wall thickness variation = maximum wall thickness minus minimum wall thickness
Measured on the body within 3mm of the cavity/gate insert parting line

6) Ovality
 

Maximum ovality of the preform not to exceed 0.2mm. in the body of the preform



Ovality = maximum diameter minus minimum diameter

7) Perpendicularity

             (prior to re-heat)

Max 0.75mm

Ave: 0.5mm
 

8) Overall length
( excluding gate protrusion)
 

Preform length

Tolerance

Up to and including 120mm

± 0.5mm
 

Over 120 mm

± 0.5% of perform length

9) Crystallinity
 

Crystallinity in gate area: to be within 8mm diameter centered on gate tip (for preform base diameter less than 35mm)
Crystallinity through the gate area: to have a depth less than 50% of the bottom wall thickness
Crystallinity in body: not acceptable

10) Sink marks




 

Not acceptable

11) Parting line deformation
(Valid for Index molds only)

Parting line deformation "PLD" on preform body :
Many factors effect PLD including , preform design, parting line location, processing conditions

Wall thickness less than 4.00mm.: Max. 0.20mm
Wall thickness 4.0mm and greater: Max. 5% of wall thickness

(Wall thickness measured and neck ring/cavity parting line)

12) Scratches
 

Can not see by visual inspection

13) Mismatch between parting lines (excluding any mismatch designed into the preform)

0.05mm(maximum)

14) Flash

0.05mm (maximum)

15 ) Bubbles or unmelts

Not acceptable

16) Short shots

Not acceptable

17) Surface contamination

Inner and outer surface to be free of foreign material, e.g. dirt, grease, oil, …Not Acceptable on inner and outer surface of preform unless determined to be a result of the pet resin used

18) Embedded contamination

Not acceptable

19) Gate length
 

Max: 1mm

20) Hole in injection point

Less than 1.0mm deep

21) Cold slugs

Not acceptable

22) Haze

Not acceptable

23) Moisture rings

Not acceptable

24) Degraded material

Not acceptable

25) Gate lines

Not acceptable

26) Weld lines top of vent

Not acceptable

27)  Polarized light

Stress within a preform can be detected by the use of polarized light. Preform design, resin and proscessing conditions all affec the stresses within a preform.
As the stresses shown by polarized linght are subjective, this tool will only be used for reference.