After working in the building materials and chemical industries for a long time, you may have encountered such scenarios: the weight of dry mortar bags packaged in the morning is accurate, but becomes unstable when switching batches of materials in the afternoon; you clearly bought a packaging machine claimed to be "high-precision", yet the actual weighing error often exceeds 1%; even more troublesome, material blockage and dust make the whole workshop gray, and workers choke even wearing masks.
As an original manufacturer deeply rooted in the packaging machinery industry, we have heard and solved these troubles too many times while serving countless customers across the country. Today, we talk no empty words, but share technical details behind a truly practical dry mortar packaging machine and fully automatic dry mortar packaging machine as a friend. We hope to help you who are selecting equipment or optimizing production lines avoid detours.
Why Is Bottom-Filling Filling the Key to Solving Dust and Accuracy Problems?
Many friends ask: What is the advantage of Marchi's equipment? In fact, one of the cores lies in the filling method. Traditional feeding drops materials from top to bottom, resulting in a large material drop and flying dust everywhere. Moreover, when material density is uneven, the impact of falling materials interferes with sensors, leading to inaccurate weighing.
Marchi's dry mortar packaging machine (Model: MC-DLLB-100L) adopts bottom-filling filling. That is, during filling, the discharge nozzle extends directly into the bottom of the packaging bag and fills slowly from bottom to top. In this way, the material drop is extremely small with almost no impact, so dust is naturally confined inside the bag. Meanwhile, due to the stable feeding process, the weight sensor is free from additional impact interference, ensuring accuracy.
Hard Strength Behind Parameters: Accuracy, Speed and Stability
Let’s look at several key parameters, which are not cold numbers but elements directly affecting your production line efficiency.
Packaging Weight: 5～25 kg
This range covers most conventional packaging specifications of dry mortar products on the market. One machine can flexibly switch between 5kg small household packages and 25kg large engineering bags.
Packaging Accuracy: ±0.1%～0.5%
This is the core indicator to measure whether a fully automatic dry mortar packaging machine is qualified. Taking 25kg packaging as an example, an accuracy of ±0.1% means the error per bag does not exceed 25 grams. Many customers previously used equipment with errors often reaching ±1% or higher, overfilling 250 grams per bag, resulting in amazing raw material loss for thousands of bags a day. With a high-response weighing system and dual-speed (fast & slow) feeding design, Marchi first quickly fills to about 90% of the target weight, then switches to slow fine replenishment, ensuring accuracy for every bag.
Packaging Speed: 1～4 bags/minute
Does this speed sound slow? Note that for powder materials like dry mortar, excessive speed tends to reduce accuracy and increase dust. 1～4 bags/minute is a practical range balancing accuracy, dust control and equipment stability. Higher efficiency can be achieved by configuring double scales or multi-station equipment, which we will discuss later.
Total Power: 2.87 kW | Equipment Weight: 450 kg
These parameters reflect the solid structure of the equipment. A dead weight of 450kg ensures no vibration interference to weighing accuracy during operation, while a power of 2.87kW means excellent energy consumption control.
Core Configuration: Stainless Steel Body, Quick-Release Hopper and Intelligent Control System
In addition to the above parameters, several core configurations directly affect daily operation experience:
- All-Stainless Steel Structure: Not only aesthetic but also corrosion-resistant. Dry mortar often contains cement, additives and other components, which rust ordinary carbon steel after long-term contact, while stainless steel ensures durable service life.
- Combined/Open Transparent Hopper: A highly user-friendly design. The transparent hopper allows clear visibility of internal material surplus. More importantly, the hopper can be quickly disassembled for cleaning or material replacement without any tools, avoiding cross-contamination. This function is especially valuable for manufacturers needing frequent product formula switches (e.g., white cement in the morning, colored caulk in the afternoon).
- Pneumatic Bag Clamping Device + Weight Sensor: The clamping device and bracket are directly installed on the sensor. Once the bag is clamped, real-time weight is transmitted to the control system. Compared with separated designs, this integrated structure features faster response and smaller errors.
- PLC Control + Touch Screen + 10 Formula Storage: Operators only need to select "Putty Powder Formula" or "Gypsum Powder Formula" on the screen, and the equipment automatically calls corresponding filling parameters without manual adjustment of mechanical parts. The 10 storable formulas basically meet all product needs of a medium-sized factory.
Packaging Process: Smooth Operation from Bag Sleeving to Sealing
- Bag Sleeving: The operator sleeves the empty bag on the discharge nozzle.
- Bag Clamping: The pneumatic bag clamping device automatically clamps the bag mouth, while the sensor resets to zero.
- Bottom-Filling Filling: The equipment first feeds rapidly, automatically switches to slow feeding when approaching the target weight, until the set accuracy is achieved.
- Bag Releasing: The clamping device loosens, and the filled bag drops onto the conveyor belt automatically.
- Next Process: The bag passes through the conveyor belt and can be connected to a sewing machine or heat sealer for sealing.
Only manual bag sleeving is required throughout the process; all other steps are fully automatic.
Explosion-Proof and Anti-Oxidation Adaptation: Customized Solutions for Special Materials
For materials with flammable and explosive risks (such as some chemical powders, aluminum powder, etc.), conventional electrical configurations pose potential safety hazards. Marchi can provide explosion-proof configurations, including explosion-proof motors, explosion-proof solenoid valves, explosion-proof control boxes, etc., to meet relevant safety production requirements.
For materials prone to oxidation or moisture absorption (such as certain fine chemicals, food additives), the equipment can be equipped with nitrogen filling or vacuum interfaces to replace air inside the bag during filling, extending product shelf life.
Focus on Pain Points: Practical Solutions to Accuracy Drift, Blockage and Difficult Cleaning
After communicating with numerous customers, we identified three most troublesome problems:
Problem 1: Accuracy drifts during use
Usually caused by sensor interference from vibration, dust or material adhesion.
Solution: Marchi adopts high-stability sensors installed away from vibration sources; bottom-filling filling reduces impact, and the tool-free quick-release transparent hopper allows easy cleaning of residues after daily production, avoiding material caking interference to sensors.
Problem 2: Material blockage easily occurs when slightly damp or containing particles
Design of Marchi: Optimized diameter of discharge nozzle and feeding channel; widened caliber version is available for thermal insulation mortar with high sand content or finishing mortar with fibers. Dual-speed feeding adopts high-flow screw or pneumatic conveying in the fast stage and small-flow precise replenishment in the slow stage, effectively reducing blockage risk.
Problem 3: Troublesome cleaning during product switching
With the tool-free quick-release transparent hopper, one person can complete disassembly, cleaning and reassembly within minutes. The compact equipment structure has no dead corners, allowing immediate production of the next product after rinsing and drying.
Final Words: Choosing Equipment Means Choosing a Worry-Free Partner
A truly excellent dry mortar packaging machine should not make you worry about accuracy, dust, blockage and other trivial matters every day. It should be a silent and reliable partner, operating stably day after day, making your workshop cleaner, costs more controllable, and customers more satisfied.
We hope this technical detail-sharing provides practical references for you when purchasing fully automatic dry mortar packaging machines. If you are looking for a reliable dry mortar packaging machine manufacturer, you may learn more about Marchi’s equipment — it might be the answer you have been searching for.
