Plastic Injection Molded Polypropylene Float Assembly for the Agriculture Industry

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Plastic Injection Molded Polypropylene Float Assembly
Plastic Injection Molded Polypropylene Float Assembly

The project highlighted here was designed for use as a float assembly. Used in an agricultural irrigation system, it serves to eliminate air hammering within the system. Acting as a shut off valve, it allows all the air in the lines to escape before the float rises, shutting off the flow.

This product utilizes a foaming agent for buoyancy to achieve the .064 specific gravity. Obtaining this specification in such a thick part (.260") requires extra process control. The 10.00 oz. shot was injected into a 4 cavity mold, with 220 tons of clamping force. Our advanced processes allowed us to achieve all of the goals for weight and tolerances, including dimensions of 1.90" in length and width, 4.25" in height, and weight of 4.90 oz. This ongoing project consists of production runs of 500 pieces per month. For more information see the table below or contact us directly.

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Plastic Injection Molded Polypropylene Float Assembly Project Highlights

Product Description
Eliminates "air hammering" in irrigation by allowing all the air to escape the lines before float rises thereby shutting valve off.
Injection Molding Capabilities Applied/Processes
Plastic Injection Molding
  • Material Foamed to Achieve 0.64 Specific Gravity
Overall Part Dimensions
Product Length: 1.90"
Product Width: 1.90"
Product Height: 4.25"
Product Weight: 4.90 oz.
Tightest Tolerances
± 0.010"
Material Used
Base Material: PP (Polypropylene)
  • Material Thickness: 0.260"
Material Finish
Color: Natural
Additional Facts
Shot Size: 10.00 oz.
Maximum Clamping Force: 220 tons
Number of Cavities: 4
Temperature Range: 375°F - 575°F in processing
In process testing/inspection performed
Dimensional Inspection, Visual Inspection
Industry for Use
500 per Month
Delivery/Turnaround Time
2 Weeks
Delivery Location
Eastern Washington
Standards Met
Customer Quality Specifications, CAD Drawing
Full Cavity Fill/No NIT Lines
Pressure/Structural Integrity
Product Name
Float Assembly

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