In our opinion, these originally small shrinkage, such as ABS, PC, ABS+PC and AS, have nothing to do with it, but the new materials or recycled material with large shrinkage like PP, PA, PVC and others will be different.
PMMA：5/1000
POM：20/1000
PS：5/1000
PP：16/1000
PC：5/1000
ABS：5/1000
HIPS：5/1000
AS：5/1000
GPPS：5/1000
PBT：15/1000
PA66：16/1000
PA6：9/1000
TPR：18/1000
TPU：18/1000
PE：20/1000
KVA：20/1000
GP：5/1000
CA：5/1000
KRATON：20/1000
ACETAL：20/1000
PU：20/1000
PVC：20/1000
PC+ABS：5/1000
BDS(K-RESIN0)：7/1000
PA66+50%GPT：2/1000
PA66+30%GPT：3/1000
PA66+15%GPT：8/1000
PBT+30%GPT：3/1000
PP+20%GPT：5/1000
PP+30%GPT：3/1000
After several years of practice, the above shrinkage rate is absolutely reliable when the product does not exceed 300mm and the average rubber thickness does not exceed 3MM. If the product size is more than 300mm, the subtotal should be 0.0005. If the product size difference is too large, the X axis, Y axis and Z axis should be calculated separately. Special attention should be paid when the thickness of the product is too thick, too thin (less than 0.5) and the product size is too large.
In addition, different products of the same kind of plastic have different actual shrinkage rates! The following is a list of shrinkage rates summarized by our senior engineers based on years of practical experience. Let's take a closer look~
ABS (acrylonitrile-butadiene-styrene)
Figure shows the application of ABS in automobiles
Plastic name: ABS
Actual opening shrinkage: 0.0045
Mold opening product type: printer shell, car audio panel, Samsung remote control lower cover
Plastic name: ABS
Actual opening shrinkage: 0.0035
Mold opening product type: 500X35X30 DVD surface
Plastic name: ABS
Actual opening shrinkage: 0.005
Type of mold opening products: mobile phone case, mobile phone button, case, medical equipment, Midea water dispenser, electrical box, kitchen supplies, Samsung remote control electric cover, auto parts, car stereo, car MP3 case, flashlight case, vanguard bracket (DVD cover), PDA/GPS holder, measuring instrument accessories
Plastic name: ABS
Actual opening shrinkage: 0.003
Mold opening product type: key cap
Plastic name: ABS
Actual opening shrinkage: 0.0025
Type of mold opening product: support of VIETTA's sub-machine and sub-machine
Plastic name: ABS
Actual opening shrinkage: 5/1000
Mold opening product type: electrical enclosure
Plastic name: ABS
Actual opening shrinkage: 0.6%
Mold opening product type: auto parts (export)
Plastic name: ABS
Actual opening shrinkage: 0.015
Mold opening product type: controller box
Plastic name: ABS
Actual opening shrinkage: 0.003
Mold opening product type: shell type (IML process)
Plastic name: ABS
Actual opening shrinkage: 0.0035
Mold opening product type: LCD face frame
PP（polypropylene）
Plastic name: PP
Actual opening shrinkage: 0.035
Mold opening product type: 8 "casters
Plastic name: PP
Actual opening shrinkage: 0.015
Mold opening product type: Midea electric kettle
Plastic name: PP
Actual opening shrinkage: 0.016
Mold opening product type: auto parts (reflector), kitchen supplies
Plastic name: PP
Actual opening shrinkage: 0.0155
Mold opening product type: Honda car shell
Plastic name: PP
Actual opening shrinkage: 0.018
Mold opening product type: tray, medical basin
The picture shows PP medical products
Plastic name: PP
Actual opening shrinkage: 0.025
Mold opening product type: password box
Plastic name: PP
Actual opening shrinkage: 16/1000
Mold opening product type: tableware
Plastic name: PP
Actual opening shrinkage: 0.06
Mold opening product type: cosmetic bottle cap
Plastic name: PP
Actual opening shrinkage: 0.020
Mold opening product type: medical equipment
Plastic name: PP
Actual opening shrinkage: 0.015
Mold opening product type: Yunnan Baiyao Lid
PP+TA (calcium carbonate) 30% - ----------- 1%
PP+GF30 ------------0.5%
Plastic name: PP+30% GF
Actual opening shrinkage: 0.01
Mold opening product type: exhaust grille
Plastic name: PP
Actual opening shrinkage: 0.02
Mold opening product type: washing machine box
Plastic name: PP
Actual opening shrinkage: 0.011
Mold opening product type: rice cooker middle ring
Plastic name: PP-R 4.2 wall thickness
Actual opening shrinkage: 0.017
Mold opening product type: PPR water pipe
Plastic name: PP-R 10 wall thickness
Actual opening shrinkage: 0.025
Mold opening product type: PPR water pipe
Plastic name: PP+15% GF
Actual opening shrinkage: 0.015
Mold opening product type: headrest inner plate/lumbar inner plate of office chair
PE（polyethylene）
Plastic name: H-PE
Actual opening shrinkage: 0.018
Mold opening product type: Midea electric kettle
Plastic name: PE
Actual opening shrinkage: 0.02
Mold opening product type: soft gear
Plastic name: HDPE
Actual opening shrinkage: 1.02
Mold opening product type: export product
Plastic name: HDPE
Actual opening shrinkage: 0.018
Mold opening product type: strong thread cap
PA（Nylon）
Plastic name: PA6T, PA9T
Actual opening shrinkage: 3~5/% 0
Mold opening product type: connector
Plastic name: PA66
Actual opening shrinkage: 16 ‰
Mold opening product type: window lock
Plastic name: PA66
Actual opening shrinkage: 0.0079
Mold opening product type: PCB connector plastic parts
Plastic name: PA+30% GF
Actual opening shrinkage: 0.013
Mold opening product type: Zongshen motorcycle parts
Plastic name: PA66+30% GF
Actual opening shrinkage: 0.005
Mold opening product type: chair leg of office chair
Plastic name: PA+30% GF
Actual opening shrinkage: 0.0035
Mold opening product type: auto parts (reflector)
Plastic name: PA66
Actual opening shrinkage: 0.09
Mold opening product type: fan COVER
PA+30%GF
Actual opening shrinkage: 0.007
Internal rack of power plug
PBT+30%GF
Actual opening shrinkage: 0.005
Internal rack of power plug
Plastic name: PA66
Actual opening shrinkage: 0.018
Mold opening product type: lock
Plastic name: PA6
Actual opening shrinkage: 0.020
Mold opening product type: lock rocker arm
Plastic name: PA66+% 15GF
Actual opening shrinkage: 1.009
Mold opening product type: automobile gear handle
Plastic name: PA66+% 30GF
Actual opening shrinkage: 1.005
Mold opening product type: automobile gear housing
Plastic name: PA+30% GF
Actual opening shrinkage: 0.013
Mold opening product type: switch housing
PA6 (nylon): 9/1000?
Can shrinkage be so small?
I remember that I made several wheel frames with 14/1000.
Plastic name: PA66
Actual opening shrinkage: 0.009
Mold opening product type: tie
Plastic name: PA+15% GF
Actual opening shrinkage: 0.01
Mold opening product type: light barrier core
Plastic name: PA+30% GF
Actual opening shrinkage: 0.005
Mold opening product type: 168 wind wheel
Plastic name: PA6512
Actual opening shrinkage: 0.015
Product: holder base
Plastic name: rubber plastic nylon
Actual opening shrinkage: 0.01
Mold opening product type: handle
Plastic name: PA
Actual opening shrinkage: 0.015
Mold opening product type: pull rope 107
Plastic name: PA66
Actual opening shrinkage: 0.010
Mold opening product type: household switch socket base plate
Plastic name: PA66
Actual opening shrinkage: 0.006
Mold opening product type: row protection door
Plastic name: PA66
Mold shrinkage: 0.012
Mold opening product type: gadget
Plastic name: PA6+30% GF
Mold shrinkage: 0.0035
Mold opening product type: switch upper cover
Plastic name: PA66
Actual opening shrinkage: 1.0%
Mold opening product type: connector
Plastic name: PA66GF30%
Actual opening shrinkage: 0.005
Mold opening product type: high-speed fan
Plastic name: PA66+NPG25
Actual opening shrinkage: 0.0045
Type of mold opening product: an accessory of Siemens (square cover type, many ribs on the inner surface)
Plastic name: PA6+35% GF
Actual opening shrinkage: 0.004
Mold opening product type: auto parts (internal functional parts)
PC（polycarbonate）
Plastic name: PC
Actual opening shrinkage: 0.005
Type of mold opening products: mobile phone trim, car audio button, mobile phone protective shell, medical equipment
Plastic name: PC
Actual opening shrinkage: 0.0055
Mold opening product type: auto parts
Plastic name: PC
Actual opening shrinkage: 8/1000
Mold opening product type: mobile phone crystal shell
Plastic name: pc
Actual opening shrinkage: 4/1000
Mold opening product type: notebook battery cover (average meat thickness 0.6
Plastic name: PC940
Actual opening shrinkage: 8%
Mold opening product type: various plug housing
Plastic name: PC+15% GF+2% SI
Actual opening shrinkage: 0.002
Mold opening product type: printer housing
Plastic name: PC+15% GF+2% SI+10% PTFE
Actual opening shrinkage: 0.0025
Mold opening product type: printer housing
Plastic name: PC
Actual opening shrinkage: 0.004
Mold opening product type: mobile phone case
Plastic name: PC
Actual opening shrinkage: 0.0045
Mold opening product type: car audio button
Plastic name: PC
Actual opening shrinkage: 0.0036
Mold opening product type: notebook battery case
Plastic name: PC
Actual opening shrinkage: 0.6%
Mold opening product type: socket
Plastic name: PC
Actual opening shrinkage: 0.005
Mold opening product type: CD button
Plastic name: PC
Actual opening shrinkage: 0.006
Mold opening product type: switch
PS(polystyrene)
Plastic name: PS
Actual opening shrinkage: 0.005
Opening product type: Toshiba, Hualing refrigerator drawer, toys
Plastic name: PS
Actual opening shrinkage: 0.0045
Mold opening product type: printer product
Plastic name: PS
Actual opening shrinkage: 0.005
Mold opening product type: accessories
PVC
Plastic name: PVC
Actual opening shrinkage: 0.025
Mold opening product type: auto parts
Plastic name: PVC
Actual opening shrinkage: 0.03
Mold opening product type: password box handle
Plastic name: PVC
Actual opening shrinkage: 0.02
Mold opening product type: medical equipment, waterproof ring
Plastic name: PVC
Actual opening shrinkage: 0.005
Mold opening product type: blow molding bottle
Plastic name: PC
Actual opening shrinkage: 1.015
Mold opening product type: transparent cover of lamp cap
Plastic name: CPVC
Actual opening shrinkage: 0.015
Mold opening product type: water pipe joint
PMMA
Plastic name: PMMA
Actual opening shrinkage: 0.000~0.004
Mold opening product type: mobile phone lens
Plastic name: PMMA
Actual opening shrinkage: 0.002
Mold opening product type: lens
Plastic name: PMMA
Actual opening shrinkage: 0.005
Mold opening product type: lens
Plastic name: PMMA
Actual opening shrinkage: 0.03
Mold opening product type: mobile phone lens
POM（Polyformaldehyde）
Plastic name: POM
Actual opening shrinkage: 0.025
Mold opening product type: kitchen supplies, plastic gear
Plastic name: POM
Actual opening shrinkage: 0.02
Type of mold opening products: Siemens accessories (support parts), fire regulating ring, printer housing, Canon printer tooth wheel, plastic gear
Plastic name: POM
Actual opening shrinkage: 16/1000
Mold opening product type: rubber wheel
Plastic name: POM
Actual opening shrinkage: 0.000
Mold opening product type: mobile phone chute (wall thickness 0.15)
Plastic name: POM
Actual opening shrinkage: 1.025
Mold opening product type: baby carriage product (large product, wall thickness
Plastic name: pom
Actual opening shrinkage: 0.018
Type of mold opening products: remote control, switch, bracket, cosmetic container (tooth stick), small structural parts, wall thickness of 1.5-2mm, washing machine accessories, gear, rack, Sony, Panasonic and other mobile phone charger internal structural parts
Plastic name: POM
Actual opening shrinkage: 0.020-0.025
Mold opening product type: gear
Plastic name: POM, POM M90-44
Actual opening shrinkage: 0.018
Mold opening product type: pinion
Plastic name: POM TR-20
Actual opening shrinkage: 0.015
Mold opening product type: movement
Plastic name: POM
Actual opening shrinkage: 0.017
Mold opening product type: toy car wheel
Plastic name: POM
Actual opening shrinkage: 0.01
Mold opening product type: switch
Plastic name: POM
Actual opening shrinkage: 0.022
Mold opening product type: cam follower
PBT
Plastic name: PBT
Actual opening shrinkage: 1.02 transversely and 1.016 longitudinally
Model opening product type: router antenna
Plastic name: PBT+30% GF
Actual opening shrinkage: 0.004
Mold opening product type: upper and lower cover of security device, support
Plastic name: PBT
Actual opening shrinkage: 1.015
Mold opening product type: electrical shell
Plastic name: PBT
Actual opening shrinkage: 0.005
Mold opening product type: small household appliances
Plastic name: PBT+30% GF
Actual opening shrinkage: 0.0045
Mold opening product type: cooling fan
Plastic name: PBT+30% GF
Actual opening shrinkage: 0.5%
Mold opening product: AC fan
Plastic name: PBT+G6
Actual opening shrinkage: 0.005
Mold opening product type: computer fan backplane
HIPS
Plastic name: HIPS
Actual opening shrinkage: 0.0045
Mold opening product type: Philips remote control lower cover, Philips remote control battery cover, Samsung remote control battery cover, LG remote control lower cover, LG remote control battery cover
Plastic name: HIPS
Actual opening shrinkage: 0.005
Mold opening product type: Philips remote control upper cover LG, remote control upper cover, Yamaha motorcycle speaker
LCP
Plastic name: LCP
Actual opening shrinkage: 1.5~2/% 0
Mold opening product type: connector
Plastic name: LCP
Actual opening shrinkage: 0.002
Mold opening product type: coil framework, computer connector, connector
Plastic name: LCP
Actual opening shrinkage: 0.001-0.002
Mold opening product type: computer connector
Plastic name: LCP
Actual opening shrinkage: 0.001
Mold opening product type: electricity meter, connector
Plastic name: LCP
Actual opening shrinkage: 0.003
Opening product type: BOBBIN
Plastic name: LCP
Actual opening shrinkage: 0.001-0.002
Mold opening product type: computer connector
Other plastics
Plastic name: EVA
Actual opening shrinkage: 0.025
Mold opening product type: kitchen supplies
Plastic name: SAN
Actual opening shrinkage: 0.004
Mold opening product type: kitchen supplies
Plastic name: SAN
Actual opening shrinkage: 0.005
Mold opening product type: small household appliances
Plastic name: ABS+PA
Actual opening shrinkage: 0.007
Mold opening product type: auto parts (reflector)
Plastic name: ABS+PC
Actual opening shrinkage: 0.004
Mold opening product type: mobile phone cover bottom cover
Plastic name: ABS+PC
Actual opening shrinkage: 0.0035
Mold opening product type: car display panel
Plastic name: ABS+PC
Actual opening shrinkage: 0.005
Mold opening product type: mobile phone case
Plastic name: PC+ABS
Actual opening shrinkage: 0.045
Mold opening product type: optical drive tray
Plastic name: PPS+30% GF
Actual opening shrinkage: 0.0045
Mold opening product type: range finder movement
Plastic name: ABS+PA
Actual opening shrinkage: 0.007
Mold opening product type: auto parts (reflector)
Plastic name: PPR
Actual opening shrinkage: 0.017
Mold opening product type: water pipe joint
Plastic name: AS
Actual opening shrinkage: 0.004
Mold opening product type: shell
Plastic name: TPU
Actual opening shrinkage: 0.010
Mold opening product type: mobile phone rubber plug USB interface rubber plug
Plastic name: RUBBER
Actual opening shrinkage: 0.030
Mold opening product type: mobile phone RUBBER key
Plastic name: PCTA
Actual opening shrinkage: 0.003
Mold opening product type: cosmetics
Plastic name: PETG
Actual opening shrinkage: 0.004
Mold opening product type: cosmetics
Plastic name: AS
Actual opening shrinkage: 0.005
Mold opening product type: cosmetics
Plastic name: TPR
Actual opening shrinkage: 0.015
Mold opening product type: car tire
Plastic name: NTF FR52
Actual opening shrinkage: 3~5/% 0
Mold opening product type: connector
Plastic name: TPR
Actual opening shrinkage: 0.012
Mold opening product type: soft rubber
Plastic name: H161
Actual opening shrinkage: 0.008
Mold opening product type: meter bottom shell
Plastic name: AS
Actual opening shrinkage: 0.005
Mold opening product type: cosmetics
ABS camera housing 0.005
PP plastic barrel 0.016
SAN0.004
PC+ABS electrical enclosure 0.005
PC transparent shell 0.006
PVC plug 0.018
POM gear 0.024
PMMA lamp 0.004
PEI electrical enclosure 0.0035
PA6+30%GF 0.005 20%GF 0.006 15%GF 0.0075
Japan Pioneer Engineering Materials:
AS-GF20 0.003
PP-GF25 0.004
ABS+PBT+GF25 0.004
The above three materials are car audio accessories.
Plastic name: TPR TPE
Actual opening shrinkage: 0.020
Mold opening product type: golf accessories
Plastic name: ABS (1.005)
PP (1.018)
PVC (1.018)
POM (1.018)
TPE (1.018)
TPU (1.01)
All the above are for earplug products.
Plastic name: TPE
Actual opening shrinkage: 1.016 transversely and 1.022 longitudinally
Model opening product type: router antenna
Plastic name: PPS+30GF
Actual opening shrinkage: 1.0025
Mold opening product type: DVD movement
ABS X1.005 Y 1.0038 Z 1.005 Any refrigerator handle and frame bar
Plastic name: PPR
Actual opening shrinkage: 0.017
Mold opening product type: water pipe joint
Plastic name: PPS+40% wave fiber
Actual opening shrinkage: 0.0025
Mold opening product type: HID product series
Plastic name: PB
Actual opening shrinkage: 0.018
Mold opening product type: floor heating equipment, pipe, joint
Plastic name: dr101
Actual opening shrinkage: 0.010
Mold opening product type: key components of measuring instruments
Plastic name: UF (thermosetting plastic)
Actual opening shrinkage: 0.007
Mold opening product type: household switch socket panel
Plastic name: PPA
Actual opening shrinkage: 0.005
Mold opening product type: auto parts
Plastic name: PPS
Actual opening shrinkage: 0.009
Mold opening product type: auto parts
Plastic name: PET
Actual mold opening shrinkage: broken bottle
Mold opening product type: 1.005
Plastic name: ABS+PA
Actual opening shrinkage: 0.007
Plastic name: PBT+15% GF
Actual opening shrinkage: 1.003
Coupler of electrical components of mold opening products
Plastic name: PEI
Actual opening shrinkage: 1.005
Open product electrical components coupling medical equipment
Plastic name: PPo
Actual opening shrinkage: 1.005
Mold opening product: medical equipment
Plastic name: ABS+PA
Actual opening shrinkage: 0.007
Mold opening product type: auto parts (reflector)
Plastic name: PC+GF45
Actual opening shrinkage: 0.001
Mold opening product type: mobile phone case
Plastic name: PC+GF20
Actual opening shrinkage: 0.002
Mold opening product type: mobile phone case
Plastic name: PC+ABS
Actual opening shrinkage: 0.004.5
Mold opening product type: mobile phone case
Plastic name: PPE
Actual opening shrinkage: 0.004
Mold opening product type: structural part, wall thickness 2mm
Plastic name: PC+ABS
Actual opening shrinkage: 0.005
Mold opening product type: automobile wiper handle
Plastic name: ABS/PC
Actual opening shrinkage: 0.005
Mold opening product type: printer housing
Plastic name: PP+EPDM+T10
Actual opening shrinkage: 0.013
Mold opening product type: auto parts (interior panel)
Plastic name: PP+EPDM+T20
Actual opening shrinkage: 0.012
Mold opening product type: auto parts (interior panel)
Plastic name: PP+EPDM+T30
Actual opening shrinkage: 0.010
Mold opening product type: auto parts (interior panel)
Plastic name: PP+T20
Actual opening shrinkage: 0.012
Mold opening product type: auto parts (ABCD pillar)
Plastic name: TPU
Actual opening shrinkage: 0.017
Mold opening product type: switch housing
Plastic name: pc+as
Actual opening shrinkage: 0.005
Mold opening product type: printer shell
Plastic name: pps
Actual opening shrinkage: 0.002
Mold opening product type: computer fan backplane
Plastic name: eps polystyrene
Actual opening shrinkage: 0.003
Mold opening product type: foam packaging
Plastic name: PC+ABS
Actual opening shrinkage: 0.005
Mold opening product type: mobile phone case
Plastic name: PPE+PS+20% GF
Actual opening shrinkage: 0.0035
Mold opening product type: cooling fan
Plastic name: PTE
Actual opening shrinkage: 1.0%
Mold opening product type: electric shaver
Plastic name: PU
Actual opening shrinkage: 0
Mold opening product type: roller brush
