Motek introduces a mineral water logistics dedicated blow-molded pallet mold solution for the warehousing, stacking, and forklift turnover of mineral water (bottled water and 5-gallon bottled water). The core differences between these pallets and general logistics pallets lie in: the pallet surface needs to be shaped to fit and position the bottle or barrel bottoms, a fixed number of bottles per layer, and excellent moisture resistance and easy-clean performance. Formed integrally through the hollow blow molding process, the pallets offer lightweight construction, high impact resistance, and low-temperature resistance, suitable for water plant workshops, cold-chain distribution, and Automated Storage and Retrieval Systems (AS/RS). The core challenges in mold development lie in the precision forming of bottle/barrel positioning grooves, the control of blow-molded wall thickness uniformity, and structural rigidity under the heavy load of fully loaded water products. Motek configures dedicated solutions around specialized cavity layouts, positioning structure design, and cooling systems, helping customers achieve stable mass production of blow-molded pallets specifically for mineral water.
| Item | Specification |
|---|---|
| Applicable Plastics | HDPE (High-Density Polyethylene, low-temperature resistant, impact-resistant, moisture-resistant, preferred for blow molding) |
| Mold Material | P20 / 718H (pre-hardened steel); surface hardness up to HV800–1000 after nitriding; S136 optional for high-volume production |
| Number of Cavities | 1×1 (single cavity for large pallets) |
| Molding Process | Hollow blow molding (extrusion blow molding), parison inflation forming |
| Applicable Specifications | 1080×1080mm (16 barrels), 1200×1000mm (full-layer bottled water), and other specialized dimensions |
| Load Capacity Reference | Depends on specific specifications and wall thickness design (16-barrel static load approx. 4T, dynamic load approx. 1.5T) |
| Cooling System | Zoned circulating water channels + targeted cooling for bottle/barrel load-bearing areas |
| Demolding Method | Blow mold opens for removal, coordinated with demolding mechanisms |
| Surface Treatment | Anti-slip texture etching + easy-clean polished areas |
Precision Forming of Bottle/Barrel Positioning Grooves.
The core function of mineral water dedicated blow-molded pallets is to stably carry water bottles or barrels and prevent displacement or tipping during handling and stacking. Motek directly forms positioning grooves/retaining edge structures adapted to the bottle or barrel bottom profile in the blow-molded cavity. For 16-barrel (18.9L) pallets, deep grooves are formed in a 4×4 matrix, with groove center distances and depths subject to dedicated tolerance control; for full-layer bottled water pallets, dense shallow grooves or grid positioning areas are formed. Groove bottoms have rounded transitions for easy drainage and flushing.
Uniformity Control of Blow-Molded Wall Thickness.
The load-bearing performance of blow-molded pallets depends on wall thickness uniformity. Motek optimizes parison dimensions and blow ratios based on the load distribution of mineral water pallets (positioning groove load-bearing areas, support legs, forklift opening peripheries), ensuring even material distribution across cavity regions. For barrel water pallets, focus is on reinforcing wall thickness at barrel bottoms and support leg roots to prevent collapse under long-term full load; for bottled water pallets, both uniform full-layer load distribution and localized reinforcement are balanced.
Mold Clamping Precision and Appearance Quality of Blow Molds.
Blow molding produces parting lines at the parting surfaces. Motek performs precision matching machining on parting surfaces, positioning parting lines to avoid barrel/bottle contact surfaces and appearance surfaces wherever possible, reducing subsequent trimming. Double-face (if applicable) anti-slip textures and positioning grooves are subject to consistency control, ensuring water bottles/barrels are stably placed regardless of which side faces up.
Cooling Efficiency and Cycle Time Optimization.
Cooling time accounts for the major portion of the blow molding cycle for pallets. Motek designs zoned circulating cooling water channels in cavities and cores, focusing on bottle/barrel load-bearing areas and support leg areas to equalize cooling rates across regions. This avoids pallet warpage or positioning groove deformation caused by uneven cooling, which would affect the stable placement of water products. The cooling layout balances mold rigidity with cooling efficiency.
Moisture Resistance and Hygiene Adaptation for Water Plant Environments.
Mineral water pallets are exposed long-term to humid environments (water plant washing, condensation), requiring hydrolysis resistance and mold resistance. Motek ensures pallet surfaces are smooth and free of dead corners in mold design, with rounded transitions at positioning groove bottoms for easy flushing and drainage. HDPE material itself meets hygiene requirements; cavity surfaces can be polished according to customer needs to reduce dirt adhesion. For customers with strict hygiene standards, mold surface treatment solutions meeting food-contact requirements can be provided.
Blow Pin Position and Air Intake System Design.
Motek reasonably selects blow pin positions (typically at the pallet center or non-positioning groove areas) based on the structural characteristics of mineral water pallets, ensuring even distribution of compressed air to each bottle/barrel position and support leg corner. Blow pin positions avoid critical load-bearing areas and appearance surfaces, facilitating subsequent trimming.
| Pallet Specification (mm) | Load Type | Arrangement | Load Reference (Static/Dynamic) | Application Scenarios |
|---|---|---|---|---|
| 1080×1080×180 | 5-gallon barrel water | 4×4 (16 barrels) | Approx. 4T / 1.5T | Water plants, bottled water distribution centers |
| 1100×1100×150 | 5-gallon barrel water | 4×4 (16-barrel adapted) | Depends on wall thickness design | Standard barrel water turnover |
| 1200×1000×150 | Full-layer bottled water | Dense grid/positioning grooves | Depends on wall thickness design | Bottled water warehousing, automated AS/RS |
| 1200×1200×150 | Bottled/barrel water | Adapts to different bottle/barrel specifications | Depends on wall thickness design | Large water plants, integrated logistics centers |
Note: Specific load capacity and self-weight vary depending on wall thickness design, reinforcement rib layout, and HDPE raw material grade. Motek provides customized mold design based on customer 3D drawings and target load-bearing requirements.
Motek mineral water logistics dedicated blow-molded pallet molds are suitable for:
After the customer provides 3D product drawings, water bottle/barrel specifications (bottom shape and dimensions), load requirements (static/dynamic), target output, and blow molding machine model, Motek completes blow molding simulation (including parison size evaluation, bottle/barrel position area wall thickness distribution prediction, and cooling optimization) and mold structure confirmation; cavity steel is selected per process requirements (P20/718H/S136, nitrided); progress and key milestones are regularly reported during processing. During trial molding, Motek cooperates with the customer's blow molding machine for parison adjustment, inflation parameter optimization, and wall thickness inspection, with emphasis on verifying bottle/barrel position positioning precision, support leg forming completeness, and pallet flatness. Before shipment, molds undergo anti-rust treatment and action testing, with water circuit diagrams, consumable parts lists, and blow molding process parameter recommendations provided. Technical support is available during the warranty period, with lifetime maintenance consultation.













Motek — From general logistics pallets to mineral water specific blow-molded dunnage pallets, providing reliable mold solutions for the load-bearing needs of water product warehousing and distribution.