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5 Gallon Bottle Blow Mold

Heavy-duty 5 gallon PET water bottle and drum blow mold tooling Sailwin
● 1 & 2 CAVITIES · 10L TO 25L WATER CARBOY MOLD

Heavy-Duty 5 Gallon Bottle Blow Mold & 20L Water Carboy Tooling

Specialized 5 gallon blow mold engineering for 18.9L and 20L commercial drinking water carboys and table water dispensers. Reinforced with forged 40-Ton clamp locking steel backplates, pneumatic bottom pushout cylinders, and precision handle-recess inserts to withstand intense 35 Bar blow air with zero parting line flash.

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1 & 2 Cav High Output Configuration
35–40 Bar High Clamp Force Rating
55 mm Non-Spill Smart Cap Neck
5M+ Shots Heavy Structural Mold Life
TAIZHOU SAILWIN MOLDS

5-Gallon Carboy Mold Consultation

Send us your 5-gallon preform weight (600g–750g) or bottle volume requirements. Free 24h DFM report & quotation.

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HEAVY-DUTY TOOLING SPECIFICATIONS

5 Gallon PET Bottle Blow Mold Engineering Parameters

Reinforced mechanical tooling engineered for 18.9L and 20L commercial water carboys. Withstands extreme 35 Bar blowing pressure with 40-ton clamping rigidity.

Technical SpecificationStandard Parameter RangeEngineering Benefit for Bottlers
Carboy Volume Standards3 Gallon (11.3L), 5 Gallon (18.9L), 20L Large DrumsCovers universal office water dispenser coolers and large bulk industrial containers
Available Cavity Layout1-Cavity & 2-Cavity Heavy Configurations1-Cavity for 120–180 BPH lines; 2-Cavity linear high-speed output for 250–350 BPH
Neck Finish Standards55 mm Non-Spill Snap-On / Threaded FinishStandardized 55mm smart neck dimensions; 100% leakproof seal with tear-off caps
Preform Weight Compatibility600g, 650g, 680g, 720g, 750g Heavy PreformsHeavy wall preform heating and stretch profile optimization prevents base whitening
Max Blow Air Pressure30 – 35 Bar High-Pressure StandardDrives thick PET resin into sharp base ribbing and handle recess cavities
Mechanical Clamp Lock RatingUp to 40-Ton Hydraulic Mechanical WedgePrevents high-pressure mold breathing; parting line mismatch held <0.015mm
Bottom Pushout StrokePneumatic Bottom Cylinder Stroke >120mmGuarantees zero base scuffing or drag damage during bottle demolding cycle
Tooling MetallurgyForged 7075-T6 Cavity + S136 Stainless CoreSuperior heat transfer eliminates cooling bottlenecks on heavy 700g resin masses
Total Mold Weight850 kg (1-Cavity) to 1,450 kg (2-Cavity)Heavy-duty structural carbon steel backplates for zero frame flexure
Guaranteed Mold Life5,000,000+ Cycles LifespanHard anodized cavity protection with replaceable S136 base impact plates
Custom PET bottle blow molds for water beverage and 5 gallon jugs Sailwin 1 CAVITY · 18.9L CARBOY

1-Cavity Heavy 5-Gallon Carboy Mold

Engineered for standard semi-automatic and linear automatic 5-gallon blow molders. Reinforced clamping backplates eliminate parting line flash under 35 Bar.

  • Volume: 5 Gallon / 18.9L Water Carboy
  • Preform Weight: 650g – 750g Heavy Wall
  • Cycle Output: 120 – 180 Bottles/Hour
  • Bottom System: Integrated pneumatic ejector
Technical Specs →
Linear PET bottle blow mold lineup 1 to 9 cavities matrix Sailwin 2 CAVITY · MASS OUTPUT

2-Cavity High-Efficiency 20L Drum Tooling

Synchronized dual-station layout for commercial water plants. Dual-circuit independent cooling manifolds ensure identical temperature between stations.

  • Volume: 15L to 20L Large Containers
  • Cycle Output: 250 – 350 Bottles/Hour
  • Cooling: Dual high-flow water jackets
  • Clamping: Synchronized hydraulic locking
Technical Specs →
Large capacity PET water dispenser bottles and oil jugs with handles Sailwin BUILT-IN HANDLE RECESS

Handle-Recess & Easy-Grip Carboy Molds

Custom cavity inserts engineered with ergonomic handle recesses or side slider inserts, enabling easy manual carrying and loading onto water dispensers.

  • Feature: Deep ergonomic side handle recess
  • Base Type: Reinforced petaloid anti-rock base
  • Neck Type: 55mm non-spill smart bottle cap
  • Durability: Passed 1.8m water drop impact
Technical Specs →
LARGE CARBOY ENGINEERING

Specialized 5-Gallon Tooling: High Pressure & Ejection

Blowing a 700g thick-walled 18.9L container at 35 Bar requires massive mechanical clamping lockup and zero-sticking bottom ejection. Explore our core engineering breakthroughs.

3D engineering specifications for 5 gallon water drums and oil jugs Sailwin CAD SPECIFICATIONS
FEATURE 01 · STRUCTURAL FEA

Parametric 3D Engineering & Reinforcing Ribs

Thick 5-gallon containers require calibrated wall thickness transitions. Our 3D FEA simulations optimize the ratio of preform elongation to hoop expansion, placing structural strength precisely in the bumpers and base.

  • Wall Optimization: Eliminates bottom thermal gate crystallization & thin-spot blowout
  • Hoop Bumpers: Dual circumferential ribs absorb automated washing machine conveyer impact
  • Dimensional Stability: 18.9L volume variance held within ±30ml
Sailwin precision mold assembly workshop for heavy-duty 5-gallon molds 40-TON CLAMP LOCK
FEATURE 02 · ZERO FLASH ASSURANCE

40-Ton Clamping Rigidity & Taper Lock System

Under 35 Bar blowing air, the internal projected area of an 18.9L carboy generates massive parting-line separation forces. Our heavy carbon steel backplates feature dual taper mechanical interlocks to eliminate cavity breathing.

  • Clamping Resistance: Withstands up to 40 tons of parting line pressure
  • Parting Line Match: Mismatch strictly controlled <0.015mm, eliminating sharp flash
  • Frame Alloy: Hardened structural steel #45 (HRC 28–32) for zero structural flexure
Sailwin 5-axis CNC milling centers bay for heavy-duty blow molds PNEUMATIC EJECTOR
FEATURE 03 · ANTI-STICKING EJECTION

Synchronized Bottom Mold Pushout Stroke

Due to the thick resin mass at the bottom of a 700g preform, vacuum suction can cause the container to stick in the mold cavity. Our mold base incorporates a heavy-duty pneumatic actuator cylinder for smooth positive ejection.

  • Ejection Stroke: >120mm synchronized pneumatic bottom pushout travel
  • Base Protection: Prevents petaloid scuffing and base denting during fast transfer
  • Cycle Reliability: Smooth automated bottle drop for continuous robotic take-out
Large capacity PET water bottles and oil jugs with handles Sailwin DROP IMPACT STRENGTH
FEATURE 04 · ERGONOMIC HANDLING

Integrated Handle Recess & 1.8m Drop Resistance

Delivering convenient manual carrying for 20kg water carboys without creating localized stress-cracking weak points. Our smooth ergonomic radius distribution withstands 1.8m full-water drop testing.

  • Recess Architecture: Smooth radius transitions prevent corner stress fractures
  • Drop Certification: Passed 1.8-meter drop impact with 100% water fill
  • Neck Standards: 55mm non-spill smart bottle cap leak-free fitment
HEAVY-DUTY METALLURGY

Tooling Metallurgy: Aviation 7075-T6 & ASSAB S136

Thick 700g resin masses generate massive residual heat that steel alone cannot dissipate in high-speed cycles. Our hybrid metallurgy cuts cooling times while ensuring 10M+ shots base integrity.

Sailwin CNC machining workshop for heavy-duty 5-gallon molds CAVITY SHELL METALLURGY

High-Conductivity Forged 7075-T6 Aluminum

Milled from monolithic forged aluminum billets. With thermal conductivity exceeding 130 W/m·K (over 300% faster than tool steel), heat is rapidly extracted from thick bottle shoulders and waist ribs.

  • Cycle Benefit: Shortens cooling dwell time by 25% on 700g carboys
  • Hard Anodizing: 50μm wear-resistant oxide coating (HV 450)
  • Weight Savings: Lightweight shell reduces mechanical blow molder motor wear
  • Guaranteed Life: 5,000,000+ blow cycles lifespan
Mirror-polished S136 stainless steel mold cavity detail Ra 0.02um Sailwin BOTTOM IMPACT CORE

Swedish ASSAB S136 Stainless Steel Base

The 5-gallon pushout bottom core experiences continuous 35 Bar high blow force and bottom cylinder stretching impact. Vacuum-quenched S136 stainless steel guarantees zero fatigue fracture.

  • Vacuum Quenching: HRC 48 – 52 deep hardness penetration
  • Mirror Surface: Optical diamond polish Ra 0.02μm eliminates micro-flaws
  • Anti-Corrosion: 100% immune to chilled cooling water condensation
  • Guaranteed Life: 10,000,000+ blow cycles lifespan
IN-HOUSE HEAVY TOOLING CAPABILITY

Heavy-Duty Gantry Machining & Factory Trial Testing

5-gallon mold bases weigh up to 1,450kg and require heavy-tonnage CNC machine beds to prevent bed vibration during high-speed cavity roughing and finishing.

Sailwin CNC machining workshop for heavy-duty 5-gallon molds

Heavy-Tonnage Gantry CNC Centers

Equipped with large-bed CNC milling machines specifically calibrated for massive 5-gallon mold blocks, maintaining ±0.015mm geometric repeatability.

Sailwin 5-axis CNC milling centers bay for heavy-duty blow molds

5-Axis CNC Milling Centers Bay

5-axis continuous toolpath machining creates smooth, organic 3D transitions around handle recesses, base valleys, and reinforcing hoop rings in a single setup.

Sailwin precision mold assembly workshop for heavy-duty 5-gallon molds

Clean Assembly & Alignment Surface Plates

Heavy mold halves are aligned and matched on granite precision surface plates. Parting lines undergo blue-Prussian dye testing to ensure >90% contact area.

Linear PET bottle blow mold lineup 1 to 9 cavities matrix Sailwin

Linear Blow Mold Portfolio Integration

From single-cavity 20L water drums to multi-cavity small water bottle molds, we provide full factory fleet tooling standardization across your entire bottling operation.

100% In-House Machine Trial Testing Guarantee

We never dispatch unverified tooling. Every 5-gallon bottle mold is tested on our factory blow molder with 700g preforms under 35 Bar pressure. We courier 15–20 actual blown 5-gallon water carboys to your bottling plant for volumetric and drop testing prior to mold dispatch.

BUYER FREQUENTLY ASKED QUESTIONS

Technical Guidance on 5 Gallon Bottle Molds

Key engineering questions on high-pressure parting line lockup, preform weights, cycle times, handle recesses, and machine mounting.

Because a 5-gallon container has an immense projected area, internal 30–35 Bar air generates over 35 tons of mold opening force. We prevent mold breathing by fabricating heavy-duty structural steel #45 master backplates with integrated hydraulic-mechanical taper locking wedges. The dual taper interlocks clamp the mold halves rigidly together, keeping parting line mismatch strictly <0.015mm over millions of cycles.
For standard multi-use water carboys, preform weights typically range from 650g to 750g (depending on whether it has an integrated handle or plain wall). With our high-conductivity 7075-T6 cavity cooling jackets, cycle time on a linear automatic machine is approximately 20 to 26 seconds per cycle, yielding 140–180 bottles/hour per cavity.
Yes. We offer two proven engineering solutions: (1) Deep ergonomic handle recess inserts, which blow an integrated grip well into the bottle wall without needing separate parts; and (2) Manual/Automatic handle placement core inserts, where a pre-molded PP/PE handle is placed into the blow mold before clamping, fused into the PET bottle during the high-pressure blowing phase.
We use a hybrid metallurgical design: Forged 7075-T6 Aircraft Aluminum for the main body cavity (which dissipates heat 3x faster than steel to prevent cycle bottlenecks), coupled with Swedish ASSAB S136 Stainless Steel for the high-impact bottom pushout insert. This hybrid architecture delivers 5,000,000+ blow cycles lifespan with 25% faster output than all-steel molds.
Yes. We provide complete turnkey systems. We engineer the matching multi-cavity injection molds for 55mm non-spill water dispenser caps (with peel-off labels and inner floating valves), as well as separate injection molds for snap-on external handles. Sourcing both blow and injection molds from Sailwin guarantees 100% leak-free cap fitment.
Yes. We customize the mounting backplate thickness, clamping T-slots, bottom pneumatic cylinder stroke brackets, and quick-disconnect water manifold locations to match your exact machine brand, including standard Chinese linear 5-gallon blow molders, European machines, and semi-automatic units.
CUSTOM 5-GALLON QUOTATION

Start Your Custom 5 Gallon Bottle Mold Project

Upload your 18.9L or 20L carboy drawing (STEP/IGES/DWG) or describe your preform weight (600g–750g), handle recess requirements, and machine model. Our Senior Tooling Engineering team will return a comprehensive 24-hour DFM feasibility report and transparent factory quotation.

✓ Free 24h DFM 5-Gallon Blow Stretch & Clamping Lockup Feasibility Report
✓ 100% In-House Machine FAT Trial: 15–20 Actual Blown 5-Gallon Bottles Sent
✓ 5,000,000+ Cycles Heavy-Duty Tooling Lifespan Warranty
✓ Free Spare Seals, High-Pressure Water Couplings & Venting Plugs Included
📧 Direct Email: info@sailwinmachine.com
📍 Tooling Plant: 26th Floor, Tengda Center, Jiaojiang District, Taizhou City, Zhejiang, China
💬 Chat on WhatsApp: +86 151 6761 3775

Request 5-Gallon Mold Proposal

Fill out the form below. Technical parameters and quotation delivered within 24 business hours.

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