Injection Molding
Tooling and molding for your repeat plastic parts.
YOUR GRADE. YOUR CLARITY. YOUR FINISHED FIT.
PMMA / Acrylic for Your Clear Custom Parts
Review your exact stock or resin, viewing faces and final fit. Agree cleaning exposure, edge finish and sample approval before production of your clear acrylic parts.
Grade & FormIdentify stock or molding resin.
Clarity & SurfaceDefine your viewing faces.
Stress & ChemicalsReview cleaning and joining.
Records & ApprovalAgree your sample evidence.
2 Purchasing Routes. Different Material Evidence.
CNC Stock: Cast or Extruded
Confirm the actual sheet, rod or tube, thickness, color and stock-product record.
Molding Resin: Full Grade + Color
Confirm the resin designation, molding route and approved sample. A resin data sheet does not identify unspecified CNC stock.
Brand names do not authorize substitution. Material availability and manufacturing scope are confirmed for your drawing.
Choose Acrylic Around Your Part
Four starting points — select the actual product form, not only the family name.
PLEXIGLAS GS for Your Material Review
Review your visible faces and machined fit before cutting.
| Your reference | What to confirm |
|---|---|
| Material | PMMA cast sheet / stock |
| Your visible faces | Clarity, edge finish and approved sample |
| Your finished fit | Holes, datums and mating dimensions |
Define What Your Part Must Show
For PMMA optical components, specify the actual optical acceptance and verify project capability. Clear stock alone does not establish optical accuracy.
| Your reference | What to confirm |
|---|---|
| Appearance | Viewing direction, light, scratches and sample |
| Function | Transmission, haze or optical test when specified |
| Fit | Dimensions after the agreed finish |
Plan the Process Around Your Viewing Faces
For cast vs extruded acrylic machining, compare the exact stock, geometry, stress history and finish. Neither route is an automatic winner for every part.
| Your reference | What to confirm |
|---|---|
| Machining | Heat control, support and compatible coolants |
| Finishing | Accessible faces, removal allowance and sample |
| Molding | Resin, tooling, gate and approval evidence separately |
Agree Material Identity and Final Acceptance
For PMMA (acrylic) stock or resin grade traceability, retain the full manufacturer product, color, form and batch. Material documentation is separate from finished-part approval.
| Your reference | What to confirm |
|---|---|
| Material | Product and lot corresponding to actual stock or resin |
| Appearance | Agreed viewing faces and protected surfaces |
| Records | Dimensions, sample and specified functional tests |
PLEXIGLAS XT for Your Material Review
Confirm thickness, processing direction and stress history.
| Your reference | What to confirm |
|---|---|
| Material | PMMA extruded sheet / stock |
| Your visible faces | Clarity, edge finish and approved sample |
| Your finished fit | Holes, datums and mating dimensions |
Define What Your Part Must Show
For PMMA optical components, specify the actual optical acceptance and verify project capability. Clear stock alone does not establish optical accuracy.
| Your reference | What to confirm |
|---|---|
| Appearance | Viewing direction, light, scratches and sample |
| Function | Transmission, haze or optical test when specified |
| Fit | Dimensions after the agreed finish |
Plan the Process Around Your Viewing Faces
For cast vs extruded acrylic machining, compare the exact stock, geometry, stress history and finish. Neither route is an automatic winner for every part.
| Your reference | What to confirm |
|---|---|
| Machining | Heat control, support and compatible coolants |
| Finishing | Accessible faces, removal allowance and sample |
| Molding | Resin, tooling, gate and approval evidence separately |
Agree Material Identity and Final Acceptance
For PMMA (acrylic) stock or resin grade traceability, retain the full manufacturer product, color, form and batch. Material documentation is separate from finished-part approval.
| Your reference | What to confirm |
|---|---|
| Material | Product and lot corresponding to actual stock or resin |
| Appearance | Agreed viewing faces and protected surfaces |
| Records | Dimensions, sample and specified functional tests |
PLEXIGLAS 8N for Your Material Review
Review resin, mold finish and the approved molded sample.
| Your reference | What to confirm |
|---|---|
| Material | PMMA molding compound |
| Your visible faces | Clarity, edge finish and approved sample |
| Your finished fit | Holes, datums and mating dimensions |
Define What Your Part Must Show
For PMMA optical components, specify the actual optical acceptance and verify project capability. Clear stock alone does not establish optical accuracy.
| Your reference | What to confirm |
|---|---|
| Appearance | Viewing direction, light, scratches and sample |
| Function | Transmission, haze or optical test when specified |
| Fit | Dimensions after the agreed finish |
Plan the Process Around Your Viewing Faces
For cast vs extruded acrylic machining, compare the exact stock, geometry, stress history and finish. Neither route is an automatic winner for every part.
| Your reference | What to confirm |
|---|---|
| Machining | Heat control, support and compatible coolants |
| Finishing | Accessible faces, removal allowance and sample |
| Molding | Resin, tooling, gate and approval evidence separately |
Agree Material Identity and Final Acceptance
For PMMA (acrylic) stock or resin grade traceability, retain the full manufacturer product, color, form and batch. Material documentation is separate from finished-part approval.
| Your reference | What to confirm |
|---|---|
| Material | Product and lot corresponding to actual stock or resin |
| Appearance | Agreed viewing faces and protected surfaces |
| Records | Dimensions, sample and specified functional tests |
ACRYREX CM-207 for Your Material Review
Confirm the complete CHIMEI resin grade, color and current data sheet.
| Your reference | What to confirm |
|---|---|
| Material | PMMA molding compound |
| Your visible faces | Clarity, edge finish and approved sample |
| Your finished fit | Holes, datums and mating dimensions |
Define What Your Part Must Show
For PMMA optical components, specify the actual optical acceptance and verify project capability. Clear stock alone does not establish optical accuracy.
| Your reference | What to confirm |
|---|---|
| Appearance | Viewing direction, light, scratches and sample |
| Function | Transmission, haze or optical test when specified |
| Fit | Dimensions after the agreed finish |
Plan the Process Around Your Viewing Faces
For cast vs extruded acrylic machining, compare the exact stock, geometry, stress history and finish. Neither route is an automatic winner for every part.
| Your reference | What to confirm |
|---|---|
| Machining | Heat control, support and compatible coolants |
| Finishing | Accessible faces, removal allowance and sample |
| Molding | Resin, tooling, gate and approval evidence separately |
Agree Material Identity and Final Acceptance
For PMMA (acrylic) stock or resin grade traceability, retain the full manufacturer product, color, form and batch. Material documentation is separate from finished-part approval.
| Your reference | What to confirm |
|---|---|
| Material | Product and lot corresponding to actual stock or resin |
| Appearance | Agreed viewing faces and protected surfaces |
| Records | Dimensions, sample and specified functional tests |
Compare Flow — Not Optical Quality
Three Röhm molding resins, one test condition. Higher MVR is not a strength, clarity or quality ranking.
Melt Volume Rate (MVR)
230°C / 3.8 kg · ISO 1133 · cm³/10 min
Published resin references, not measurements of your part.
Source: Röhm PLEXIGLAS 6N, 7N and 8N product data. MVR is a processing comparison, not a continuous-use temperature or optical-performance guarantee.
Other PMMA Products for Your Drawing
Ten additional product references, grouped by the question they help you review.
Cast alternatives
ACRYLITE Cast (GP) · PERSPEX Clear Cast 000Confirm the full stock product and thickness.
Extruded alternative
ACRYLITE Premium (FF)Review thickness, stress and forming.
Scratch-resistant sheet
ACRYLITE Optical mar-resistantSpecify coated sides and exposed edges.
Flow options
PLEXIGLAS 7N / 6N · ACRYREX CM-211Review resin filling, walls and heat.
Impact & ductility
PLEXIGLAS 8N plus · PLEXIGLAS Resist zk5BRConfirm the exact modified product and approval.
Extrusion resin
ACRYREX CM-205Confirm resin, section and product evidence.
Product references are review candidates, not inventory, authorization or confirmed LK manufacturing capability.
Read the Complete Material Callout
| Your material record | What it identifies |
|---|---|
| Base polymer | PMMA · polymethyl methacrylate |
| Cast / extruded stock | Actual stock manufacturer, product, thickness and color |
| Modified / coated products | Exact modifier or coating; supplier-declared formulation |
| Composition report | Agreed method and actual lot; no percentage inferred from a photo |
Resolve 6 Clarity & Fit Risks Before Production
Define the View That Your Part Must Pass
For your acrylic machined surface finish, mark viewing faces and agree light, angle, permitted marks and an approved sample. Acrylic optical polishing requires a defined acceptance and confirmed process scope.
01 · Viewing face02 · Light & angle03 · Allowed marks04 · Approved sample
Separate Viewing Faces from Bonding Edges
Polishing can remove material and change geometry. Review residual stress and cleaners; do not default to flame-polishing a bonding edge.
01 · Viewing face02 · Joint face03 · Removal allowance04 · Final inspection
Review Access Before Promising an Internal Finish
For acrylic tube internal polishing or a blind bore, send depth, diameter, access, wall and finish requirements. Do not assume an external polish reaches an internal face.
01 · Bore access02 · Depth / diameter03 · Wall support04 · Finish sample
Review the Joint and the Actual Exposure
Acrylic stress cracking can involve residual stress, cleaners, adhesives and assembly loads. Review compatibility and the actual joint, not only the base polymer.
01 · Cleaner / adhesive02 · Contact time03 · Joint load04 · Sample trial
Agree the State for Your Final Fit
Evaluate temperature, mounting restraint and mating materials. Review product-specific annealing and stabilization before the final measurement.
01 · Temperature02 · Mounting restraint03 · Stabilization04 · Datums
Protect the Surface You Approved
Specify compatible cleaning, handling, film or packing and the appearance check at receipt. A scratch-free sample needs protection through shipment.
01 · Cleaner02 · Handling03 · Protection04 · Receiving check
Match the Route to Your Finished Part
Illustrative concepts. Material, process and finishing scope are confirmed for your project.
Agree 3 Checks for Your Receiving Team
| Your check | Evidence to agree |
|---|---|
| 01 · Material identity | Full product, color, form and batch. |
| 02 · Appearance & fit | Viewing faces, dimensions and protected edges. |
| 03 · Function & records | Specified tests, approved sample and documents. |
PMMA (acrylic) finished part inspection requirements should separate dimensions, appearance and functional evidence. Dimensional inspection alone does not establish optical performance.
6 Inputs for Your Acrylic Quote
- 01CAD + controlled drawing
- 02Full product + color + stock form
- 03Process + first order + repeat quantities
- 04Viewing faces + finish sample
- 05Load + temperature + cleaners
- 06Critical fits + records + delivery
Material · Machining or molding · Finish · Inspection · Delivery
Answers Before You Specify
What should be included in a custom acrylic parts quote?
For your acrylic machining quote or PMMA injection molding quote, send CAD, controlled drawing, full product and color, stock or resin route, quantities, viewing faces, finish sample, critical dimensions, exposure and records.
Do you offer acrylic microfluidic machining?
Send channel geometry, dimensions, surface and bonding requirements for feasibility review. Material availability does not establish microfluidic, optical or regulated-device capability.
Can machined acrylic parts be delivered without polishing?
Yes, when the agreed machined appearance meets your requirement. Define viewing faces, permitted tool marks and a sample before removing a finishing step.
How should optical clarity be specified for PMMA parts?
Agree transmission, haze, surface or other optical tests where required, with method, geometry and acceptance. Visual transparency is not an optical-grade finished-part approval.
Why do acrylic parts crack after cleaning or bonding?
Review residual and assembly stress, cleaner or adhesive compatibility, contact time and temperature. Trial the actual product and joint; no generic treatment guarantees crack-free use.
When should acrylic parts be annealed before final inspection?
Review the exact product, machining, bonding and stress history with its manufacturer guidance. Agree support, stabilization and final inspection rather than applying one universal heat-treatment cycle.
Can blind holes in acrylic parts be polished internally?
Access, depth, diameter and remaining wall determine feasibility. Provide the actual bore and acceptance sample; blind internal faces require project review.
Does acrylic polishing change critical dimensions?
It can remove material or round edges. Plan allowance, protect datums and inspect after the agreed finishing sequence.
Can a machined PMMA prototype validate molded optical parts?
It can support selected geometry or assembly checks, but does not establish mold-surface replication, residual stress or molded optical performance. Validate the actual production route.
Is acrylic the same as polycarbonate?
No. Review polymer, impact requirements, cleaning exposure and fit before approving a change.
Is cast acrylic always better than extruded?
No universal ranking fits every part. Confirm the stock product, thickness, stress, machining geometry, finish and cost scope.
Can one PMMA grade replace another?
Only after reviewing manufacturer, complete product, color, form and your finished-part requirements. Brand similarity does not authorize substitution.
Material references: POLYVANTIS / ACRYLITE / PLEXIGLAS · Röhm · CHIMEI · PERSPEX. Exact products, sources and limitations retained in the page records.
Engineering Plastics → PC → Quality Assurance →
