Injection Molding of Plastic Sleeves for Construction Industry

Injection Molding of Plastic Sleeves for making round holes in concrete during the pouring of floors.

A customer in the construction industry commissioned us at Midwest Plastics for the production of their custom plastic sleeves, utilized in making round holes in concrete during the pouring of floors. We sourced the appropriate material, selecting recycled HDPE. Production was carried out utilizing our injection molding expertise and advanced 500 ton injection molding press, which features automatic material handling. Manufacturing required 9 different molds and frequent mold changes, creating 9 units varying in size from 1 1/2 in in diameter by 9 in tall, up to 12 in in diameter by 9 in tall. The resulting parts were subjected to comprehensive testing for accuracy and integrity, undergoing fracture and strength tests.

At Midwest Plastics, we often go the extra mile to ensure customer satisfaction and make certain that completed projects meet our internal standard of excellence. In this instance we were willing to purchase a third machine and additional auxiliary equipment in order to handle increasing volumes, and agreed to stock products for the customer. In addition, we also maintain the older molds required for this product. Our flexible manufacturing capabilities allow for adaptation to shifting schedules and variations in demand, as well as accommodating changes to product sizing while still meeting our promised short lead times.

Over 100,000 units are produced for this customer monthly, with turnaround times of 3 days per unit size, with parts shipping to the customer in St Paul. For more details about this plastic sleeve injection mold project, or our other custom manufacturing capabilities please see the table below or contact us directly.

Project Name & Description Injection Molding of Plastic Sleeves for making round holes in concrete during the pouring of floors.
Capabilities Applied/Processes Injection Molding
Equipment Used to Manufacture Part 500 t Injection Molding Machine
Overall Part Dimensions 9 Sizes Ranging in Size

  • Diameter – 1 1/2 to 12 in
  • Height – 9 in
Material Used HDPE – Recycled
Industry for Use Construction
In Process Testing/Inspection Performed Fracture / Strength Test
Volume 100,000 and up units
Delivery/Turnaround Time 3 days per Size
Delivery Location St. Paul