Bottom Filling Degassing Jumbo Bag Scale Becomes Core Packaging Equipment for New Energy & Advanced Material Industry

With the rapid expansion of lithium battery, silicon-carbon anode, graphite, new ceramic and high-end chemical new material markets, ultra-fine powder packaging pain points including severe dust overflow, bag bulging, low stacking density and inaccurate weighing have restricted production efficiency and product quality for most manufacturers. Recently, MJ Machinery’s independently developed bottom filling degassing jumbo bag scale has been widely applied in new energy and advanced material production lines, relying on innovative bottom filling synchronous degassing technology to solve the industry’s long-standing packaging bottlenecks. As a 23-year professional solid bulk packaging solution provider, MJ Machinery optimizes the whole workflow of weighing, degassing, filling and conveying, bringing comprehensive cost reduction and efficiency improvement to new energy material factories worldwide.

Working Principle of Bottom Filling Degassing Jumbo Bag Scale

Different from traditional top-feeding ton bag machines, MJ bottom filling degassing jumbo bag scale adopts the integrated design of lifting bottom filling + dual-stage vacuum degassing + closed-loop weighing control, with a fully automatic cyclic workflow as follows:

1. Bag hanging & sealed clamping: Workers hang anti-static jumbo bags on the hanging mechanism, the airbag clamping device fully seals the bag mouth to form a closed filling cavity; the equipment automatically inflates the empty bag to eliminate internal folds.

2. Lifting bottom filling with low drop: The filling nozzle extends deep into the bottom of the ton bag, and the weighing platform slowly descends synchronously with material filling. The material drop height is controlled below 10cm, avoiding violent splashing of ultra-fine powder caused by high-altitude blanking.

3. Synchronous dual-stage degassing core process: Servo vertical screw conveys materials with gradual shrinking screw pitch for mechanical pre-compression to discharge 60% of free air; meanwhile, the built-in nano-microporous negative pressure degassing tube works continuously under -0.095MPa vacuum, extracting adsorbed air in powder gaps, and the filter interlayer intercepts fine powder to avoid material loss. After filling, the bottom vibrating platform performs secondary vibration degassing to remove residual tiny air bubbles.

4. Three-stage precise weighing: High-precision weighing sensors transmit weight data to PLC in real time, adopting rough feeding → medium feeding → micro fine feeding three-speed feeding control, dynamically adjusting screw speed via PID closed-loop algorithm to guarantee stable weighing accuracy.

5. Automatic discharging & post-process conveying: After reaching the set weight, the feeding valve cuts off materials instantly; the clamping device releases the bag automatically, and the roller conveyor sends the finished jumbo bag to the heat sealing and robotic palletizing station to complete the full packaging line.

6. Self-cleaning circulation system: The filter screen adopts automatic back-blowing ash removal to prevent blockage of the degassing pipeline, ensuring stable long-term degassing efficiency.

Core Selling Points for New Energy & Advanced Material Industry

1. Bottom filling design, zero dust loss for high-value ultra-fine powder

New energy materials such as lithium iron phosphate, ternary cathode material, artificial graphite, silicon-carbon composite powder feature ultra-fine particle size, light specific gravity and strong air adsorption. Traditional top filling leads to massive dust flying, causing expensive raw material waste and workshop environmental pollution. MJ bottom filling structure minimizes material impact, with full closed airbag sealing + three-stage negative pressure dust recovery system, dust recovery rate ≥99.5%. It effectively reduces the loss of high-cost lithium powder, meets national dust emission standards, and avoids explosion risks of conductive combustible powder in workshops.

2. Deep degassing solves bag bulging, cuts storage & logistics costs

Ultra-fine new energy powder easily mixes with air, resulting in expanded, bulging ton bags that cannot be stacked normally, with high transportation breakage rate and low warehouse utilization. Our dual-stage vacuum + vibration combined degassing technology reduces residual air rate inside bags to less than 2%, improving material bulk density by 30%–45%. The ton bag is flat and compact after filling, supporting multi-layer pallet stacking, lowering packaging bag consumption, container and warehouse space occupation by nearly 30%, greatly cutting logistics and packaging material costs for material manufacturers.

3. High weighing accuracy, reduce raw material loss

Equipped with imported high-sensitivity digital weighing modules, the weighing error of 500–2000kg jumbo bags is controlled within ±0.2%. For high-value lithium battery raw materials priced at tens of thousands of dollars per ton, stable precision avoids long-term cumulative material loss, creating visible economic benefits for enterprises. The whole machine supports real-time weight data recording and MES system docking, realizing full production traceability, matching intelligent factory construction demands of new energy enterprises.

4. Anti-static & explosion-proof customized configuration, match lithium material production standards

Aiming at flammable and conductive new energy powder, MJ provides full explosion-proof electrical customization: explosion-proof motors, intrinsically safe control cabinets, static elimination ion fans, grounding protection and explosion vent structures, fully complying with GB 15577 dust explosion safety specifications. All parts contacting materials adopt SUS304 stainless steel with mirror polishing, optional PTFE anti-sticking coating and nitrogen-filled anti-oxidation structure, preventing lithium material from moisture absorption and oxidation to guarantee electrochemical performance of finished batteries.

5. High automation & labor saving, compatible full intelligent packaging line

The equipment supports semi-automatic manual bag hanging and fully automatic robot bag feeding two modes. Only 1–2 workers are needed to assist the production line, matching MJ’s supporting roller conveyor, weight checker and robotic palletizer to form a one-stop turnkey packaging solution from filling to palletizing. The touch screen intelligent control panel can store formulas for multiple new energy materials, switching packaging parameters of graphite, lithium salt, ceramic powder with one click, suitable for multi-variety flexible production of advanced material factories.

Main Applicable New Energy & Advanced Materials

New Energy Lithium Battery Industry

Cathode materials: Lithium iron phosphate, NCM ternary material, lithium cobalt oxide, lithium carbonate Anode materials: Natural/artificial graphite, silicon-carbon composite powder, hard carbon, soft carbon Lithium chemical auxiliary materials: Lithium hexafluorophosphate, lithium hydroxide, conductive carbon black

Advanced New Material Industry

Nano ceramic powder, boron nitride, rare earth powder, metal alloy micro-powder, new flame retardant, high-purity catalyst powder, degradable polymer compound powder

Industry Customer Feedback

A Qinghai potash & lithium resource enterprise adopted MJ bottom filling degassing jumbo bag scale for lithium carbonate packaging line in 2025. The project director said: “Before using traditional ton bag machines, the lithium carbonate bags swelled seriously, only 3 layers could be stacked, and dust loss exceeded 1.2% per batch. After switching to MJ degassing bottom filling equipment, stacking layers increased to 6 layers, raw material loss dropped below 0.15%, and the annual comprehensive logistics and raw material cost saved over 1.8 million RMB.”

A domestic leading pet feed & new carbon material manufacturer delivered a full set of MJ automatic degassing ton bag packaging line in early 2026, realizing unmanned packaging workshop for graphite additive powder, with daily output increased by 40% and workshop dust concentration reaching food-grade clean standard.

About MJ Machinery Engineering Co.,Ltd.

Founded in Wuxi in 2004, MJ Machinery owns a 20,000㎡ standardized production base, 129 independent patents and 23 years of professional experience in bulk solid packaging. We focus on customized packaging solutions of 0.1–2000kg bags, drums and pallets, integrating R&D, production, after-sales global service. Our packaging equipment has been exported to more than 80 countries, covering new energy, chemical, fertilizer, food and metallurgy industries. We provide 3-year full machine warranty, 7-year free wearing parts replacement and lifetime technical maintenance service, supporting one-on-one customized equipment design according to customer material characteristics and workshop layout.

If your new energy or advanced material factory encounters problems such as dust overflow, bag bulging, low packaging efficiency and inaccurate weighing, welcome to contact MJ Machinery to obtain targeted bottom filling degassing jumbo bag packaging solutions.