1 kg sand-filled weight plate exploded assembly

Create a **fully detailed, manufacturable 3D CAD model of a 1 kg sand-filled plastic weight plate** designed for fitness use. ### Main specifications * Target finished weight: **1.000 kg** * Material: **rotational-molding-grade HDPE/LLDPE** * HDPE density: **0.95 g/cm³** * Sand density: **1.60 kg/L** * Starting outer diameter: **145 mm** * Starting thickness: **40 mm** * Center hand hole: **50 mm** * Center reinforced hub: **90 mm** * Nominal wall thickness: **4 mm** * Rounded outer edges: **6 mm radius** * 4 symmetrical radial reinforcement ribs ### Construction Create a **hollow internal sand chamber**, not a solid disc. Add a **40 mm filling opening** connected directly to the chamber, with a removable threaded HDPE/PP cap and **2–3 mm EPDM/silicone gasket**. Design the body specifically for **rotational molding**, avoiding sharp internal corners, impossible undercuts, and inaccessible cavities. ### Weight calculation Automatically calculate: **Plastic mass + cap + gasket + sand = 1.000 kg** Calculate the actual internal cavity volume and required sand quantity using the modeled geometry. Do not assume the starting dimensions automatically equal 1 kg. ### CAD outputs Generate: * Complete 3D model * Internal sand cavity * Cap and gasket * Exploded assembly * Center cross-section * Front/top/side views * Dimensions and material specifications * Wall-thickness analysis * Mass and volume calculation * Preliminary handle/load FEA * Two-piece rotational-molding mold * STEP, STL and engineering drawing exports Make the final design **symmetrical, ergonomic, impact-resistant, and suitable for physical prototyping**, while clearly flagging dimensions that require physical testing before production.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.