Customized Plastic Injection Mould Plastic Mold Design Mold Development Mold Processing Mold Injection
Plastic Injection Molds Parts Service
Xiamen
Meteor offers more injection molds parts design and manufacturing
service, we have more 10+ experience in injection molds field. All of
projects we will put them from DFM to PFM working flow to ensure
products quality, from molds design, mold flow analysis, per-mold
machining review a series of testing reports to make sure mold
production running smoothly. We are proud of our mold producing flowing,
product quality guarantee, delivery on time and we have professional
engineer team to support your projects, make it so easy, make you so
comfortable.
Plastic Mold Design Guidelines
Size
The
maximum part outline that can be molded is approximately 18.9 in.
(480mm) by 29.6 in. (751mm) or roughly equivalent to 175 sq. in. (1,129
sq. cm.). A maximum part volume of approximately 59 cu. in. Depth up to
4 in. (101mm) from the parting line with 3 degrees of draft, or up to
8 in. (202mm) total if the parting line can pass through the middle of
the part, inside and outside. Deeper parts are limited to a smaller
outline.
Draft
A
taper applied to the faces of the part that prevent them from being
parallel to the motion of the mold opening is called draft. This keeps
the part from being damaged due to scraping as the part is ejected out
of the mold. Recommended draft:
0.5 degrees on all vertical faces is strongly advised.
2 degrees works very well in most situations.
3 degrees is minimum for a shutoff (metal sliding on metal).
3 degrees is required for light texture (PM-T1).
5 or more degrees is required for heavy texture (PM-T2).
Tolerances
Typically,
Proto Labs can maintain a machining tolerance of ±.003 in. (0.08mm)
with an included resin tolerance that can be greater than but no less
than ±.002 in./in. (0.002mm/mm).
Wall thickness
With
injection-molded parts, observing proper (and uniform) wall thickness
helps parts avoid potential issues such as sink marks and warpage.
Recommended thicknesses vary by material:
Resin | Inches |
ABS | 0.045 - 0.140 |
Acetal | 0.030 - 0.120 |
Acrylic | 0.025 - 0.500 |
Liquid crystal polymer | 0.030 - 0.120 |
Long-fiber reinforced plastics | 0.075 - 1.000 |
Nylon | 0.030 - 0.115 |
Polycarbonate | 0.040 - 0.150 |
Polyester | 0.025 - 0.125 |
Polyethylene | 0.030 - 0.200 |
Polyphenylene sulfide | 0.020 - 0.180 |
Polypropylene | 0.025 - 0.150 |
Polystyrene | 0.035 - 0.150 |
Polyurethane | 0.080 - 0.750 |
A
number of standard finishes are available for injection-molded parts at
Proto Labs. Our current finishes include non-cosmetic, low-cosmetic and
EDM finishes; bead-blast texturing; and high-end mold polishing.
Standard finishes (from least to most costly):
PM-F0: | Non-cosmetic: finish to Protomold discretion |
PM-F1: | Low-cosmetic: most toolmarks removed |
PM-F2: | Non-cosmetic: Protomold discretion, EDM finish and/or toolmarks permissible |
SPI-C1: | 600 grit stone, 10-12 Ra |
PM-T1: | Protomold texture, SPI-C1 followed by light bead blast |
PM-T2: | Protomold texture, SPI-C1 followed by medium bead blast |
SPI-B1: | 600 grit paper, 2-3 Ra |
SPI-A2: | Grade #2 Diamond Buff, 1-2 Ra |
*"PM"
in the table signifies a surface finish adjusted to fit the quick-turn
injection molding process, where SPI (The Society of the Plastics
Industry) denotes an industry-standard finish.
Width | Height | Pull |
≤ 8.419 in | ≤ 2.377 in | ≤ 2.900 in |
≤ 213.84mm | ≤60.38mm | ≤73.66mm |
Proto Labs stocks hundreds of thermoplastic resins for injection molding that offer a variety of benefits for many different applications and industries. See full list of materials.
ABS
ABS/PC
Acetal Copolymer
Acetal Homopolymer
ETPU
HDPE
LCP
LDPE
LLDPE
Nylon 6
Nylon 6/12
Nylon 66
PBT
PC/PBT
PEEK
PEI
PET
PETG
PMMA
Polycabonate
Polypropylene
PPA
PPE/PS
PPS
PS
PSU
SB
TPE
TPU
TPV