China Manufacturers Customized Plastic Hardware Tool Box 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: ResinInchesABS0.045 - 0.140Acrylic0.025 - 0.500Liquid
crystal polymer0.030 - 0.120Long-fiber reinforced plastics0.075 -
1.000Nylon0.030 - 0.115Polycarbonate0.040 - 0.150Polyester0.025 -
0.125Polyethylene0.030 - 0.200Polyphenylene sulfide0.020 -
0.180Polypropylene0.025 - 0.150Polystyrene0.035 -
0.150Polyurethane0.080 - 0.750Surface finish 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
discretionPM-F1:Low-cosmetic: most toolmarks
removedPM-F2:Non-cosmetic: Protomold discretion, EDM finish and/or
toolmarks permissibleSPI-C1:600 grit stone, 10-12 RaPM-T1:Protomold
texture, SPI-C1 followed by light bead blastPM-T2:Protomold
texture, SPI-C1 followed by medium bead blastSPI-B1:600 grit paper,
2-3 RaSPI-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. Radii Because Proto Labs
employs an automated CNC milling process to make the mold for your
parts, some part corners will end up with a radius rather than a
sharp edge. This does not usually require a change to the model,
but the designer is made aware of these radii before the mold is
made. Ejector pins Proto Labs' injection molding process uses
ejector pins of various sizes to push the plastic part out of the
mold after it has solidified. The sizes and arrangement of these
pins are selected to minimize the impact on your part design.
Ejector pins range in size from 0.063 in. (1.6mm) to 0.5 in.
(12.7mm), with sizes larger than 0.063 in. (1.6mm) preferred.
Undercuts Our molding process supports simple undercuts in your
part geometry. Maximum side core dimensions: WidthHeightPull≤ 8.419
in≤ 2.377 in≤ 2.900 in≤ 213.84mm≤60.38mm≤73.66mm/* March 10, 2023
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