Injection Molded Plastic Parking Bumper Shell With Concrete Fill
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Solution Overview
Problem
Conventional concrete parking bumpers are difficult and expensive to transport, prone to degradation from outdoor elements, and require frequent maintenance due to fading paint and vulnerability to freeze-thaw cycles.
Innovation Solution
Injection molded plastic parking bumper shells with a half-octagonal cross-section, featuring internal ribs, z-puller pins, and hollow extensions that can be filled with concrete, providing structural support and color retention, and are designed for easy nesting and anchoring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional concrete parking bumpers are used, then structural strength is achieved, but transportation cost and difficulty increase
Solution Approach 1:
The parking bumper is divided into two separate components: a reusable plastic shell and fillable concrete. This segmentation allows the shell to be manufactured once and transported empty, while the concrete is added locally at the installation site, significantly reducing transportation costs and complexity while maintaining the structural strength of the final assembled bumper.
Solution Approach 2:
The plastic shell is designed to contain and nest the concrete filling material within its cavity. This nesting arrangement allows the concrete to be poured into the pre-manufactured shell, combining the structural integrity of concrete with the transportation advantages of the lightweight plastic container.
2Illumination intensity
If painted concrete parking bumpers are used, then visibility and identification are improved, but maintenance frequency increases
Solution Approach 1:
The plastic shell is manufactured in various colors (such as yellow) and includes UV stabilizers to prevent fading. This inherent coloration eliminates the need for painting and reduces maintenance frequency, as the color is integral to the material rather than a surface coating that can chip or fade.
3Duration of action of stationary object
If concrete parking bumpers are used, then durability is achieved, but vulnerability to freeze-thaw cycles increases
Solution Approach 1:
The parking bumper uses a composite structure combining plastic and concrete materials. The plastic shell provides a protective barrier that reduces the concrete's exposure to harmful freeze-thaw cycles and road salt, while the concrete provides structural mass and strength. This composite approach mitigates the vulnerabilities of concrete to environmental degradation.
4Strength
If concrete parking bumpers are used, then structural integrity is maintained, but cargo space efficiency decreases
Solution Approach 1:
By separating the structural shell from the filling material, the system allows the plastic shell to be transported in a nested, space-efficient configuration. The concrete is not transported with the shell but is instead added at the destination, eliminating wasted cargo space and improving transportation efficiency while maintaining the structural integrity of the final bumper assembly.
Data Source
AI summary
A parking bumper shell that can be easily filled with a heavy form-filling material (such as concrete) to form a parking bumper is provided. The parking bumper shell may be injection molded from durable, brightly-colored, UV- and weather-resistant plastic. Undercuts, such as in the form of a plurality of undercut wings or z-puller pins, may be disposed on the interior of the parking bumper shell's top and side walls to aid in holding the parking bumper shell and the heavy filling material together. The parking bumper shell may also include internally projecting hollow extensions that are adapted to receive anchoring posts. While the parking bumper shell is being filled, it may be placed in a rigid frame which helps the shell to keep its shape during filling. The parking bumper shells are light-weight, nestable, and do not require internal steel rebar reinforcement, thereby greatly reducing transportation costs.