Case Making Machines
High-Speed Digital Automatic Case Making Machine
Screen Printing Machines
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In modern industrial binding, luxury corporate identity production, and archival preservation, the role of a precision screen frame for screen printing for personalized stationery and lever arch file casing has transformed dramatically. No longer confined to basic graphic embellishments, today’s screen printing framework operates as an electro-mechanical system where micron-level tension dynamics, advanced aluminum profile metallurgy, and digital Computer-to-Screen (CTS) imaging intersect. As personalized corporate notebooks, executive desk planners, and durable archival lever arch file casings shift toward high-tactile, scratch-resistant, and visually intricate embellishments, manufacturing lines require uncompromising screen stability to achieve registration tolerances within ±0.01 mm.
Lever arch file casings present unique post-press engineering challenges. Unlike flexible standard paper sheets, casing substrates range from heavy duplex greyboards (1.5 mm to 3.5 mm caliper) coated with laminated polypropylene (PP), polyurethane (PU) synthetic leather, bookcloth, and textured specialty paperboards. Applying dense UV tactile inks, high-build gloss varnishes, security holographic textures, and vibrant white underbases onto these rigid, non-uniform surfaces demands screen frames capable of sustaining extreme tension (up to 30–35 N/cm) without micro-flexing or frame fatigue across multi-thousand-cycle production runs.
Engineered with aircraft-grade 6063-T6 alloy, featuring internal cross-rib reinforcements to eliminate diagonal twisting under ultra-high pneumatic mesh tensioning.
Maintains dynamic parallel distance against heavy calipers, allowing rapid ink release and preventing squeegee drag lines across textured lever arch file grooves.
Direct integration with Computer-to-Screen laser scanners like the DIS-300, bypassing conventional film distortion for 2400 DPI fine typography and intricate filigree.
The core performance of screen printing on rigid stationery casings hinges on how the screen frame manages elastic deformation during squeegee impact. When applying high-density spot UV varnishes or heavy solvent-based primers to abrasive bookbinding materials, the mesh must overcome considerable hydrodynamic drag. If a screen frame experiences even minor warping, the snap-off distance (off-contact) fluctuates across the printing bed. This variance leads directly to ink bleeding on leatherette notebook spines, ghosting along the hinge crease of lever arch file cases, or ragged edges on fine typography.
Key Engineering Criterion: For automated high-speed cylinder presses (such as the ST-1050AH and ST-1300A/1450A series), screen frames are milled with high-precision locating notches and hardened pneumatic clamping surfaces. This ensures instant setup calibration, repeatable micro-metric positioning, and seamless synchronization with automatic feeding cylinders without operator guesswork.
Selecting the correct mesh fabric (polyester monofilament vs. stainless steel wire mesh) mounted onto the screen frame is dictated by the aesthetic and functional requirements of the lever arch casing:
• 77T to 90T (195–230 mesh/inch): Ideal for high-build tactile UV varnishes, glitter inks, and braille emboss-simulations on luxury personalized stationery covers.
• 120T to 140T (305–355 mesh/inch): The industry benchmark for dense, high-opacity white printing on deep-black dyed binder boards and leatherette executive organizers.
• 150T to 165T (380–420 mesh/inch): Employed in conjunction with cold-foil adhesive printing on machines like the ST1050C, transferring micro-thin metallic foils onto binder casings with clean hairline reproduction.
The post-press and packaging machinery market is witnessing a rapid convergence of screen printing, inline cold foiling, and automated case making. The application landscape has expanded into three distinct commercial sectors:
Archival ring binders and office lever arch files must withstand years of mechanical handling. Using the ST-1060AD Linear Magnetic Servo Screen Printing Press and reinforced screen frames, manufacturers apply scratch-resistant polyurethane clear coats and chemical-resistant UV inks directly over metallic ring-fixing channels, edge-wrap zones, and spine label windows. The high tension consistency ensures ink layers penetrate deep into paper-plastic laminates, preventing peeling at folded hinge joints.
Personalized stationery lines utilize screen printing frames to deliver intricate multi-color registrations, soft-touch matte overcoats, and 3D micro-embossed holographic effects. By deploying the ST1050CM Cold-Foil and Cast&Cure Multi-Functional Line, corporate clients can embed customized holographic crests and variable metallic monograms onto notebook covers with zero hot-stamping die costs.
High-end lever arch systems frequently incorporate matching slipcases. Screen frames designed with uniform lateral tension permit wrap-around graphic alignment across three-dimensional folded carton boards and high-density fiberboards, preserving visual continuity across corporate archiving suites.
Guangdong Shengtu Intelligent Equipment Co., Ltd., (ST Machinery) established in 1998 and based in Dongguan, specializes in intelligent printing and packaging equipment and solutions.
As the primary drafting unit, ST Machinery participated in formulating the national industry standard JB/T 12712-2016 Printing Machinery—Book Cover Making Machine, which was officially implemented in June 2016. In 2017, the company was designated as the only "Practical Training Base for Case-Making Equipment in the Printing and Equipment Industry under the Mechanical Industry Vocational Skills Identification System" in China. Since then, it has successfully conducted multiple training sessions.
The company currently offers an extensive range of intelligent molding and efficiency-boosting equipment under the “ST” brand. With its head office in Dongguan, Shengtu operates production facilities in both Dongguan and Shanghai, and has established sales offices across North, Southwest, and East China. Internationally, it maintains a robust network of distribution partners throughout Southeast Asia, South Asia, the Middle East, Europe, and North America.
With over 20 years of focus on a specialized product line and a team averaging 5+ years of industry experience, we deliver professional pre-sales and after-sales service.
Staying ahead in the industry, driving continuous advancement in case making and screen printing technology, and providing more professional solutions.
To build a shared vision, move forward with unity, and win the lasting trust and recognition of our customers worldwide.
Our young, energetic, and innovative team brings fresh thinking, fast response, and endless drive to every project.
ST Machinery Factory was established, specializing in the trade of second-hand post-press printing equipment.
Dongguan Shengtu Bookbinding Machinery Co., Ltd. was established, focusing on the production of post-press equipment. In 2005, the company introduced its first fully automatic case-making machine.
Dongguan Shengtu Printing Equipment Co., Ltd. was established. With a relocation to a new facility, the company expanded its business scope to specialize in the manufacturing of fully automated packaging and printing equipment.
Shengtu fully acquired Shanghai SCT Intelligent Equipment Co., Ltd., marking a strategic expansion into the development and production of screen printing machines and related auxiliary equipment.
Guangdong Shengtu Intelligent Equipment Co., Ltd. was established, further expanding the company's business scope and advanced manufacturing capacity.
The company has relocated to its self-built industrial park — the Shengtu Intelligent Manufacturing Park — in Dongguan Dalingshan Town, providing state-of-the-art testing grounds for high-precision screen printing and case-making technology.
Explore our integrated printing and packaging machinery tailored for personalized stationery, lever arch file casing, and industrial graphics.
