Borke Mold Specialists, Inc. is your source for the bestPressure, Vacuum, Thermoforming
and Rotational Molds
Services & CapabilitiesVacuum & Pressure
Forming Molds
Custom CNC or Cast Molds for PlasticsCustom CNC Machining of
Patterns & Fixtures
Custom Dies, Pressure Boxes & Plugs
View Examples Of Our WorkCNC Aluminum Pressure Form Mold for Aircraft PartsCincinnati REDS Blow Molded Seat Pan and Back Vacuum Form Mold for Car Front BumperMold Manufacturing of In-Line Vacuum Mold, Die, Box for Lids & TubsVacuum Form Mold & Fixtures for Acrylic/ABS CoversPressure Form Mold for Refrigerator Liners
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Design & Manufacturing of Vacuum Forming Mold for a Refrigerator Liner for the Appliance Industry

Cast Aluminum MoldCast Aluminum Mold Refrigerator Liner
[click to enlarge]
Cast Aluminum Mold Refrigerator Liner
  Plug AssistCast Aluminum Plug Assist Air - Water Manifold
[click to enlarge]
Cast Aluminum Plug Assist Air - Water Manifold
  Pressure Box PushersCast Aluminum Pressure Box Pushers
[click to enlarge]
Cast Aluminum Pressure Box Pushers

A client with appliance manufacturing assets in both the United States and Mexico approached Borke Mold Specialists in regards to designing, casting, and assembling a plastic fridge liner for use within heavy machinery. After consulting the customer-supplied DWG 2D CAD files, and creating our own 3D models based off the supplied specs, we set about the involved processes of aluminum casting, CNC machining, and overall assembly.

We CNC machined foundry patterns for the mold and pressure box then had aluminum castings made for us to finish. By means of CNC machining programmed via MasterCam, we then machined the square core for the mold, the pushers in the pressure box and the 2 alignment pins. After tying all the air cylinders together into a common manifold this will allow the customer to control all the pushers with the vacuum forming machine. The mold surface was sanded to a 180 grit smooth finish and #78 vacuum holes drilled every 1.5" apart. The mold included .005" in per inch plastic shrink and produced a part with a tolerance of +/-1/32".

The final part for the fridge liner component is 18.5" x 17.5" x 15.5" in height. The mold and pressure box project was manufactured in 6 weeks time-frame and weighed over 1000#. For more information about Borke Mold Specialists, and our projects, please consult the chart below, or contact us today.

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Design & Manufacturing of Vacuum Forming Mold for a Refrigerator Liners Project Highlights

Product Description We designed and manufactured a vacuum forming mold for a refrigerator liner for a client in the heavy machinery industry.
Capabilities Applied/Processes Design
  • Design Vacuum Forming Mold & Pressure Box Using MasterCAM CAD/CAM Software
  • Created 3D Models based off of Supplied 2D Drawings
Aluminum Casting
  • Create Foundry Patterns for Mold & Pressure Box
CNC Machining
  • Programming Produced in MasterCAM
  • Machine Mold for Square Core
  • Machine Aluminum Plug
  • Machine 2 Cone Alignment Pins
  • Tie All Air Cylinders Together into a Common Manifold
Equipment Used to Manufacture Refrigerator Liner CNC Mill
Overall Refrigerator Liner Dimensions Final Plastic Component:
1/8" Styrene
Length: 18 ½"
Width: 17 ½"
Height: 15 ½"
Tightest Tolerances ± 1/32
Shrinkage Allowance: .005 in/in
Temperature Range 150° Operating Temperature on Mold
Materials Used Mold:
Cast Aluminum
Fridge Liner: Styrene
Surface Finish (Mold) 180 Grit Smooth Finish
Components Used Square Core to Retract and Extend on 2up Mold with Air Cylinder
Aluminum Plug Assist to Push Plastic into Tight Corners on Mold w/ Air Cylinder
2 Cone Alignment Pins to Keep Mold and Pressure Box in Alignment
In process testing/inspection performed CMM, calipers, and scales
Estimated Part Weight 1000 lbs.
Industry for Use Appliance
Turn Around Time 6 Weeks
Delivery Location U.S.A.
Standards Met Customer supplied DWG 2D CAD File
Product Name Plastic Fridge Liner
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