Automatic Case Erectors

Say Goodbye to Inefficient Manual Case Erecting and Uneven Bottom Sealing: Create an Ultra-Fast, Precise Experience for Automatic Case Erecting and Bottom Sealing

The Automatic Case Erector (also known as an automatic carton opening and bottom sealing machine or case forming machine) is an industrial-grade automation solution built specifically to solve end-of-line packaging pain points, such as slow manual erecting speeds, non-square box forming, crooked or wrinkled tape sealing, high carton jam rates, and escalating labor costs.

LANTU Machinery introduces tailored, full-line automatic case erecting solutions. Featuring heavy-duty steel frame construction, pneumatic-mechanical linkage drives, dual servo/stepper synchronized carton fetching, and precision hot-melt glue or tape bottom-sealing mechanisms, the machine operates across five core stations (1. Horizontal/Vertical Cardboard Magazine Auto-Feeding $\rightarrow$ 2. Precision Vacuum Suction Cup Erecting $\rightarrow$ 3. Automatic Front and Rear Flap Folding $\rightarrow$ 4. Dual Side Flap Folding & Flattening $\rightarrow$ 5. Bottom BOPP Tape / Hot-Melt Sealing & Output). It functions like an expert dedicated to end-of-line packaging. Whether processing standard RSC cartons, e-commerce mailing boxes, heavy-duty 5-ply corrugated cases, or oversized cartons, it realizes end-to-end integration: automatic fetching, 90° square forming, smooth bottom flap folding, and tight bottom sealing with zero jams, zero tape wrinkles, high squareness, and no manual contact required.

As a direct source packaging machinery manufacturer, LANTU Machinery makes this complex process—carton fetching, square forming, bottom flap folding, and tape/glue sealing—as intuitive as using a smartphone. Operators simply adjust length, width, and height handwheels or touchscreen parameters and load flat cardboard blanks into the storage magazine. The machine automatically manages vacuum fetching, square forming, and bottom sealing to deliver market-ready square cartons. Operating at speeds from 10 to 30 cases/minute (customizable up to 50 cases/min), this machine drastically shortens packaging cycles while saving labor, time, and operating costs.

Choosing a reputable source manufacturer is crucial for your return on investment. LANTU Machinery’s mature vacuum fetching and square-forming technologies deliver high reliability and continuous operational stability to keep your packaging line running without interruption.

Core Components & Three Key Systems (LANTU Precision Parts)

Our Automatic Case Erector is built with industry-leading components to ensure high quality, zero defects, and extended machine lifespan.

1.Cardboard Storage, Vacuum Fetching & Square Forming System

High-Capacity Horizontal/Vertical Magazine: Holds 100–200 flat cardboard blanks at a time and supports continuous re-loading without stopping production.

Multi-Suction Cup Vacuum Fetching Mechanism: Features distributed SMC-grade vacuum suction cups powered by high-negative-pressure vacuum generators that firmly grip and open slightly warped or damp cardboard blanks.

Dual-Side Cam / Pneumatic Square Forming Mechanism: Innovative square-forming mechanisms lock carton corners into 90° right angles during opening, eliminating scissors-cut misalignment caused by uneven folding.

2.Automatic Bottom Flap Folding & Tape/Glue Sealing System

Pneumatic Sequential Flap Folder: Precision pneumatic cylinders sequentially fold front, rear, and side bottom flaps smoothly without jam risk.

Tape Dispensing Head / Hot-Melt Bottom Sealing Unit: Equipped with high-elasticity press rollers and concealed safety blades for bubble-free tape application. Optional Nordson hot-melt glue systems satisfy tamper-evident and heavy-duty sealing requirements.

Heavy-Duty Synchronized Side Belts: Dual side-clamping belts transport cartons synchronously through the sealing section to guarantee smooth, straight travel without tilting.

3.Central Control & Safety Protection System

Siemens / Mitsubishi PLC Central Controller: Industrial-grade multi-core CPU paired with a color HMI touchscreen provides central control, fault self-diagnostics, and multi-language support.

Magazine Empty / Jam / Tape Depletion Smart Protection: Smart sensors monitor cardboard stock and tape status in real time. Alarms trigger automatically when cardboard is low, while tape breaks or jams trigger millisecond stops to prevent unsealed cartons and material backups.

Fully Enclosed Acrylic Safety Guarding: Key moving areas feature transparent safety doors that stop operation instantly when opened, meeting CE and industrial safety standards while protecting operators.

Technical Specifications

Note: Actual erecting speed depends on carton dimensions, corrugated stiffness, and box quality. Left-hand (L-type) and Right-hand (R-type) layouts available upon request.

Complete Automatic Case Erecting Workflow

Station 1 (Cardboard Blank Auto-Feeding): Flat cardboard blanks stacked in the magazine move automatically toward the front fetching zone via gravity or pneumatic pushers.

Station 2 (Vacuum Fetching & Opening): Manipulator arms drive vacuum suction cups against the front cardboard blank, gripping and pulling it open into a 3D rectangular box.

Station 3 (Square Alignment & Short Flap Folding): Square-forming mechanisms lock the four box corners into 90° right angles as pneumatic cylinders push the front and rear short flaps flat.

Station 4 (Long Flap Folding & Flattening): Left and right long flaps fold inward along guide rails to form a flat, tightly closed bottom surface.

Station 5 (Bottom Sealing & Finished Output): Side belts transport the carton through the sealing head, where BOPP tape or hot-melt glue seals the bottom seam under press rollers before discharging the ready case.

Applicable Carton Formats & Industry Applications

Engineered for maximum operational return, the LANTU Machinery Automatic Case Erector offers broad carton and industry versatility across multiple sectors:

1.Applicable Carton Specifications

Standard 3-Ply / 5-Ply Corrugated Cartons (A/B/C/E Flute): Broad compatibility with e-commerce mailers and shipping boxes.

Dimension Range Coverage (e.g.): Length 200–500mm, Width 150–400mm, Height 100–400mm (custom oversized or ultra-small formats available).

2.Applicable Industries

Food, Beverage & Condiments: Sauce bottle cases, beverage cartons, instant food boxes, snack shipping cases, etc.

Personal Care & Pharmaceuticals: Toiletries, cosmetics, pharmaceutical master cartons, medical device packaging, etc.

Electronics & E-Commerce Logistics: 3C electronics boxes, small appliance shipping cases, e-commerce warehouse fulfillment packaging, etc.

5 Reasons to Choose LANTU Machinery Case Erectors

When investing in automated end-of-line packaging equipment, high precision, low maintenance, and continuous operation stability are core metrics. LANTU Machinery builds every machine for plug-and-play operation and extended service life.

Forced 90° Square Forming Without Misalignment: Proprietary pneumatic squaring and diagonal tensioning guarantee 90° right-angle corners, preventing scissors-cut misalignments.

Triple Smart Protection Against Missing Cartons, Tape Ends, and Jams: Full sensor coverage triggers automatic alarms when cartons are low, tape breaks, or jams occur, protecting unattended plant operation.

2-Minute Fast Changeovers via Handwheels: Accommodates multiple carton sizes through handwheels with precision scales, enabling full height/width/length adjustments in 2 minutes without tools.

Pre-Factory Live-Carton Testing: Every machine undergoes continuous high-, medium-, and low-speed testing using real cartons across varied qualities (damp, thin, heavy-duty) to eliminate fetching and sealing faults prior to shipment.

Voltage & Air Pressure Dual Protection: Built-in wide-range voltage regulation and pneumatic overload protection handle factory power and air pressure fluctuations to ensure consistent suction and sealing performance.

Key Factors to Consider When Purchasing an Automatic Case Erector

To select the ideal machine configuration for your production line, evaluate the following key purchasing metrics:

Target Speed (cases/min):

10–15 cases/min: Standard vertical case erector (cost-effective, ideal for small-to-medium plants).

18–25 cases/min: High-speed horizontal case erector (ideal for medium-to-large automated lines).

30–50 cases/min: Ultra-high-speed servo case erector (ideal for fulfillment hubs and high-speed beverage packaging).

Bottom Sealing Method:

BOPP Tape Sealing: Low cost, highly versatile, and easy to replace.

Hot-Melt Glue Sealing: Tamper-evident, high bond strength, ideal for heavy goods or high-end export cartons.

Carton Dimension Range & Wall Thickness: Confirm minimum/maximum length, width, and height, as well as 3-ply vs. 5-ply construction, to determine suction cup sizing and cylinder push forces.

Magazine Orientation & Plant Layout: Select left-hand (L-type) or right-hand (R-type) configurations and vertical vs. horizontal magazines based on floor layout.

Line Integration Needs: Evaluate requirements for connecting with automatic case packers, top flap folders, strapping machines, and robotic palletizers.

Frequently Asked Questions (FAQ)

Q1: If cardboard blanks absorb moisture in the warehouse and become soft, will suction cups fail or cause jams?

A: No. Our case erectors utilize multi-cup distributed vacuum systems powered by high-negative-pressure generators. Combined with mechanical gripping arms and diagonal squaring mechanisms, soft or slightly warped cardboard blanks are pulled open and squared reliably.

Q2: Is machine adjustment complex when switching between different carton sizes? How long does it take?

A: It is very straightforward. All adjustment points feature handwheels with precision scale rules and position indicators. Operators can complete height, width, and length adjustments in approximately 2 minutes without tools.

Q3: Can the automatic case erector integrate with our existing packaging line or downstream sealers?

A: Fully supported. Our control systems feature standard industrial PLC communication interfaces (e.g., RS485, Ethernet, dry contacts) to seamlessly interface with upstream casing stations and downstream flap-closing sealers, strappers, and palletizing robots.

Contact the Direct Source Manufacturer Today for a Custom Case Erecting Solution!

LANTU Machinery — Dedicated to Packaging Equipment Manufacturing with Factory-Direct Quality Assurance.