PMMA (Acrylic) Injection Molding Services On Aria

PMMA (Acrylic) injection molding parts offer high heat resistance, high gloss finish durability, and optical properties

Upload 3D CAD File to Start A New Injection Molding Quote

step | stp | stl | igs | iges | obj
All uploads are secure and confidential.
Acrylic Machining

What is PMMA (Acrylic) lastic?

PMMA is a versatile thermoplastic with excellent optical clarity, high gloss finish, good mechanical properties, and chemical resistance, widely used in various applications such as lenses, light covers, and display components.

Additionally, It is also relatively easy to process, facilitating the production of complex shapes with precision. Moreover, it has a certain level of chemical resistance, enhancing its durability in different environments.

Description

Full Name

PMMA (Acrylic)

Finishing options

Mold texturing,Pad printing,Laser engraving,Electroplating, Bead Blasting

Appearance

Clear or Transparent

Prices

$

Features

Density

1.18 g/cm³
 

Strengths

High mechanical rigidity, Excellent transparency, Easy to polish, low water absorption

Tensile Strength​

10400 PSI

Elongation at Break

4-5%

Hardness

Rockwell R hardness of 105

Advantages of PP Injection Molding

There are many benefits derived from  plastic molding, Some of the advantages of the material include:

Durability icon
Excellent Optical Properties
It has high optical clarity like glass, making it ideal for products requiring transparency and light transmission.
 
Superior Aesthetic Qualities

PMMA can attain a high-gloss finish, giving molded products a smooth, shiny and visually appealing look.

Versatility icon
Good Mechanical Properties

Acrylic exhibits good dimensional stability. Once molded, the parts maintain their shape and size over time

Electrical Insulation icon
Ease of Processing

PMMA is fast and efficient, enabling high-volume production and cost-effective manufacturing of numerous identical parts.

Good Dimensional Stability
Chemical Resistance

It shows resistance to a variety of chemicals such as dilute acids, alkalis, and some solvents.

Applications of PMMA (Acrylic) Injection Molding

Optical and Lighting
Lenses
Light Guiding Panels
Light Fixtures, LED light
Pendant lights or wall sconces
Automotive
Instrument cluster covers
Door handle bezels
Taillight lenses
Turn signal housings
Medical
Ultrasound machines
Blood glucose monitors
Dentures
Dental trays
Consumer Goods
lipstick tubes, compacts
Lotion bottles
Transparent enclosures for toys
Food storage containers

Acrylic Injection Molding Material Properties

PMMA (Acrylic) Plastic Properties

Value

Tensile Strength (Yield) (MPa)

66

Flexural Modulus(GPa)

2.96 - 3.3

Impact Resistance (Izod Impact, Notched)

0.999 - 3.81 ft-lb/in

Maximum Service Temperature(℃)

90

Chemical Formula

(C5O2H8)n

Glass Transition Temperature(℃)

85–165 °C

Heat Deflection Temperature(℃)

96

Drying Temperature(℃)

80-90

Drying Time(hr)

3

Mold Temperature(℃)

40~90

Melt Temperature(℃)

205~230

Injection Pressure(MPa)

100~170

Injection Speed( mm/sec)

50–100

Cooling Time(S)

20~30

Scrap Quantity(mm)

2~6

Back Pressure(MPa)

13~28

Clamping Force(ton/in2)

4

Return Speed (rpm)

60~80

Shrinkage

0.3-0.8%

PMMA (Acrylic) Injection Molding Design Guide

Wall Thickness

PMMA is typically between 1.5 – 5 mm. Thinner walls can lead to issues such as sink marks, short shots (incomplete filling of the mold), and poor structural integrity.

Radii

Avoid sharp corners in acrylic as it’s sensitive; they impede moldability and cause stress. Min radius: 25% wall thickness; for max strength, use 60%.

Draft Angle

A draft angle is necessary to facilitate the ejection of the molded part from the mold. For the external surfaces of PP living – hinge – containing parts, a draft angle of 1 – 5° is usually sufficient.

Rib

The rib thickness is typically 0.5 – 0.7 times that of the adjacent wall to minimize sink marks and cooling issues. Also, consider the rib height carefully to avoid warping; limit it to around three times its base width as a guideline.

Booses

The diameter of the boss should be at least twice the diameter of the screw to ensure sufficient strength. A recess or counterbore can be designed around the boss to prevent the screw head from protruding above the surface of the part.

Part Tolerance

Injection molded parts have two main tolerance types: commercial and fine. For acrylic parts under 160 mm, commercial tolerances range from 0.1 to 0.325 mm. For those equal to or smaller than 100 mm, fine tolerances of 0.045 to 0.145 mm can be achieved.

Custom parts for your aerospace projects now

All information and uploads are secure and confidential.

Related Post

Scroll to Top