Pre-packaging method and apparatus for bulk goods, and flat-mouth bag

Abstract

A pre-packaging apparatus for bulk goods, and a matching flat-mouth bag and pre-packaging method. The pre-packaging apparatus for bulk goods comprises: an electronic scale module, which includes a weighing sensor, a controller (114) and a display screen (15), wherein the weighing sensor is used for acquiring goods weight data; a sealing machine module, which is mounted on an upper part of the electronic scale module, and comprises a fixed clamping plate (21), a movable clamping plate (22) and a driving electric motor (25), wherein the driving electric motor controls the opening and closing movement of the movable clamping plate relative to the fixed clamping plate; a static ink-jet printer module, which is fixed to a side part of the fixed clamping plate, and includes a movable spray nozzle and an ink-jet controller; and a control switch, which is electrically connected to the controller, wherein the controller is configured to synchronously start a sealing operation of the sealing machine module and an ink-jet operation of the static ink-jet printer module in response to a trigger signal of the control switch.

Description

Pre-packaging method, device and flat bag for bulk goods Technical Field

[0001] The present invention relates to the technical field of packaging of bulk pre-packaged commodities, and in particular to a pre-packaging method of bulk pre-packaged commodities and a matching pre-packaging device and a pre-packaging flat bag. Background Art

[0002] In the retail sector, such as supermarkets and fresh food markets, the pre-packaging process for bulk goods includes primary packaging, weighing and pricing, label printing, and sealing. This process has the following systemic flaws:

[0003] Efficiency bottleneck: Manual intervention in multiple steps (such as labeling and bag tightening) results in time-consuming operations, often leading to queues during peak hours (industry research shows the average waiting time exceeds 3 minutes);

[0004] Environmental burden:

[0005] Plastic pollution: Hundreds of millions of single-use packaging bags are consumed daily, of which approximately 40% do not enter the recycling system (quoted from the Global Plastic Pollution Report 2023);

[0006] Label waste: The use of adhesives in paper price labels increases the proportion of non-degradable materials;

[0007] Garbage classification conflicts:

[0008] Difficulties in wet waste disposal: Wet kitchen waste bags are prone to becoming entangled in processing equipment (statistics show that this type of failure accounts for 18% of equipment downtime), requiring bags to be broken and disposed of.

[0009] Hygiene risks: The bag-breaking operation can easily cause kitchen waste to come into contact with hands, and user acceptance is less than 30% (based on consumer behavior survey data).

[0010] Although existing technical solutions (such as CN201910562345.6 and US2021368274A1) have attempted to replace the process with degradable materials or partially automate improvements, they have not been able to overcome the following limitations:

[0011] Lack of full lifecycle management: Focusing only on the packaging production or use stage, ignoring the optimization of the entire chain from bagging and weighing to disposal;

[0012] Insufficient system coordination: The functions of the electronic scale are limited to weighing and price tag printing, and fail to form a coordinated design with the packaging form, sealing method and subsequent waste disposal needs;

[0013] Cost-benefit imbalance: The biodegradable material solution causes packaging costs to surge by 300%, making it difficult to promote on a large scale.

[0014] Therefore, an integrated solution is urgently needed in this field to achieve the following three goals:

[0015] Improved efficiency: Reduce manual intervention nodes through process integration;

[0016] Pollution control: reduce the use of non-degradable materials from the source;

[0017] Processing adaptation: Make the packaging form naturally compatible with garbage classification standards. Technical issues

[0018] Existing technologies attempting to improve the pre-packaging of bulk goods still have significant technical gaps and systemic flaws, specifically manifested in the following hierarchical contradictions:

[0019] 1. Problems of single functions and fragmented processes

[0020] Although existing electronic scale equipment (such as that described in CN201910562345.6) has basic weighing and pricing functions, its hardware architecture and software system are not adapted to the packaging process integration requirements:

[0021] Mechanical separability: weighing, packaging, and labeling require manual operation, and there is a lack of physical linkage between devices;

[0022] 2. Blind spots in life cycle management

[0023] While existing biodegradable material solutions (such as the PLA / PBAT composite film disclosed in US2021368274A1) have made progress in material substitution, they suffer from three major disconnects:

[0024] - Use-disposal disconnect: The physical and chemical properties of degradable bags (such as moisture permeability > 15g / m2·24h) are incompatible with the requirements for wet garbage bag breaking, resulting in a misalignment between the degradation cycle and waste disposal nodes;

[0025] - Discard-recycling disconnect: Degradable bags are mixed into traditional plastic recycling streams and pollute the recycling system.

[0026] 3. System Collaboration Failure and Technical Redundancy

[0027] Existing automation solutions (such as the combination of an automatic sealing machine and an electronic scale) have the following drawbacks, resulting in an overall efficiency improvement of less than 10%:

[0028] - Spatial conflict: The modular layout of the equipment did not optimize the packaging movement line, and the overlapping operation radius caused the intersection of personnel movement lines;

[0029] -Control redundancy: weighing, labeling and sealing operations are disconnected;

[0030] 4. Cost control and scale bottlenecks

[0031] - Existing market solutions result in increased costs due to technological fragmentation:

[0032] - Hidden costs increase: the price of biodegradable bags is difficult to accept;

[0033] These shortcomings demonstrate that existing technical solutions only offer limited improvements to a single process, failing to establish a comprehensive, coordinated system spanning "weighing, packaging, labeling, and disposal." Furthermore, they fail to achieve cross-system coupling between packaging physical properties and waste classification standards. This directly leads to the triple paradox of "limited efficiency gains, wasted environmental benefits, and low user compliance" when the technology is implemented, severely hindering the retail industry's green transformation. Technical Solutions

[0034] To solve the above problems, the present invention provides a method for pre-packaging bulk commodities and a matching pre-packaging device and pre-packaging flat bag, aiming to solve the problems existing in the prior art. Specifically:

[0035] A bulk commodity pre-packaging device that integrates weighing, sealing, and coding functions. The core invention is to achieve the simultaneous execution of weighing, sealing, packaging, and labeling processes through an electromechanical collaborative control architecture. The specific structure of the device includes:

[0036] 1. Composite main structure:

[0037] - Weighing subsystem: includes a cantilever beam weighing sensor, a strain gauge signal amplifier, and an ARM Cortex-M4 controller. A non-slip weighing plate is provided above the weighing sensor.

[0038] -Hot-press sealing subsystem: integrated above the weighing pan, including:

[0039] - Fixed splint: built-in nickel-chromium alloy heating plate, the surface is covered with polytetrafluoroethylene anti-stick layer

[0040] - Movable splint: The opening and closing mechanism is formed by the bearing and the fixed splint

[0041] - Drive assembly: KK-1564B push-pull electromagnet, stroke accuracy ±0.1mm

[0042] -Synchronous inkjet printing subsystem:

[0043] The inkjet printer module is fixed to the side of the fixed splint, and its technical features include:

[0044] - Three-degree-of-freedom adjustment bracket: realize ±15mm position calibration of the printhead on the X / Y / Z axis

[0045] - Contact trigger switch: automatically activates inkjet printing when the movable clamp closes to the working distance

[0046] - Printing unit: supports variable data printing, resolution 300dpi

[0047] 2. Intelligent control system

[0048] -Multi-signal coupling circuit:

[0049] Construct a chain trigger logic of weighing signal → sealing instruction → inkjet printing data. The specific implementation method is as follows:

[0050] a) Weighing stable signal (weight fluctuation > 2 seconds < 0.5g) activates control enable

[0051] b) After a single trigger control switch, the controller outputs synchronously:

[0052] - RS232 serial command to inkjet printer module

[0053] - Pulse Width Modulation (PWM) signal to the heating element

[0054] - Drive pulses to drive components

[0055] 3. Key Inventive Features

[0056] -Time and space synchronization control technology:

[0057] Establish a matching relationship between the heat sealing temperature field formation time (t1) and the coding mechanical response time (t2), and use the preheating algorithm to make t1-t2≤50ms to ensure that the coding ends synchronously when the sealing is completed.

[0058] -Mechanical coupling elimination design:

[0059] A buffer damper is added to the movable splint to absorb the interference of sealing pressure on the load cell.

[0060] -Multimodal operation interface:

[0061] Develop triple control channels of physical panel buttons, touch screen virtual buttons, and foot switches.

[0062] The present invention also provides a flat bag for pre-packaging bulk goods, which has inner folding edges on both sides. By arranging a bag opening line near the bottom of the bag body and a bag breaking line in the center above the bag opening line, the flat bag for packaging bulk goods has multiple transformable forms; first, there is the initial body state of the first usage form. After the goods are placed in the bag body, the bag opening is transversely sealed by a sealing machine to form a sealed package, which is the second usage form; when the bag is opened, it is torn along the provided bag opening line to take out the goods, forming a third usage form "vest bag" that can hold items again, and the U-shaped notch on the bag body becomes the bag opening of the new "vest bag"; in the third usage form, the two handles of the "vest bag" are gently pulled, the provided bag breaking line is split, the bag body is torn into two halves, and the broken bag becomes the fourth usage form of dry garbage that is easy to recycle.

[0063] When the inner sides of the two handles of the "vest bag" are gently pulled outward to form a straight line, the bag film in between will be stretched into a force band (line), and the bag breaking line will lie horizontally on it, and the length can be less than the width of the force band.

[0064] The bag opening line is an inverted U-shaped tear line that is easy to tear. The U-opening faces the bag bottom and extends horizontally across the inner folds on both sides. The bag tear line is a tear line that runs along the machine direction (MD) of the film during bag making. The bag tear line can be simplified as a knife-cut slit. Because the closer the bag tear line is to the edge of the bag film, the more likely it is to be accidentally torn, causing damage to the plastic bag. Therefore, appropriate spacing should be maintained between the bag tear line and the bag opening line, as well as between the bag opening line and the bag bottom edge.

[0065]

[0066] The present invention also provides an integrated packaging method for bulk commodities based on an intelligent terminal, which is characterized by achieving an efficient packaging process through multimodal perception and collaborative control, and specifically includes the following steps:

[0067] 1. Data configuration phase (S0)

[0068] -Product information entry:

[0069] - Establish a structured product database, including product codes, multi-angle high-resolution images (≥5 million pixels), unit prices, specifications and safety certification information

[0070] - Support data synchronization mode:

[0071] - Local storage (encrypted SQLite database)

[0072] - Cloud synchronization (based on HTTPS protocol, supports breakpoint resuming)

[0073] 2. Intelligent weighing stage (S1-S2)

[0074] -Dynamic weighing calibration:

[0075] - Adopt adaptive filtering algorithm (Kalman filtering) to eliminate environmental vibration interference

[0076] - Weight stability judgment condition: Weight fluctuation <0.05g for 2 consecutive seconds

[0077] -Product identification and matching:

[0078] - The visual recognition unit performs the following processes:

[0079] ① Image acquisition (frame rate 60fps, resolution 1920×1080)

[0080] ② Feature extraction (based on ResNet-50 network)

[0081] ③ Similarity matching (cosine similarity threshold > 0.95)

[0082] 3. Spray blocking and coordinated control phase (S3-S5)

[0083] -Timing control logic:

[0084] Stage execution action time window accuracy requirements

[0085] T0 Heating element pre-start 0-50ms Temperature deviation ±1℃

[0086] T1: Splint closed and pressurized for 50-300ms, pressure control ±0.2N

[0087] T2 inkjet printing execution time 100-300ms ink drop positioning error ≤ 0.1mm

[0088] T3 system reset 300-350ms Position repeatability ±0.05mm

[0089] -Multiple trigger mechanisms:

[0090] - Physical button (mechanical, trigger force 3±0.5N)

[0091] - Touch screen virtual buttons (capacitive, response time <80ms)

[0092] - Foot switch (Hall effect sensor, IP68 protection level)

[0093] 4. Quality traceability stage (S6)

[0094] -Generate coding information:

[0095] - Plain text data area: product name, weight, unit price, total price, sealing time (timestamp accuracy 1ms)

[0096] - Graphic code specifications:

[0097] - QR Code Version: QR Code Version 10 (57×57 module)

[0098] - Error correction level: L (can recover 7% data loss) Beneficial effects

[0099] The present invention discloses a method, device and flat bag for pre-packaging bulk commodities. Compared with the prior art, the present invention has the following advantages:

[0100] The present invention provides a complete technical solution for pre-packaging bulk goods in supermarkets. The pre-packaging device allows for the one-step weighing, sealing, and coding of bulk goods. Supermarkets can also eliminate the need for labeling and tying, thereby improving efficiency and reducing costs. The multi-modal and multi-functional use of the pre-packaging flat bags not only allows plastic bags to be reused multiple times, but also solves the problem of wet garbage bags breaking. One ink cartridge can print 200,000 to 300,000 times, and self-adhesive labels are calculated at 500 stickers per roll. Thus, one ink cartridge can eliminate 400 to 600 rolls of label paper, saving nearly 90% of costs. It also turns waste into valuables, adding 200,000 to 300,000 easily breakable wet garbage bags and saving 2 to 3 tons of plastic. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments, which constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions explain the present invention and do not constitute improper limitations on the present invention. In the drawings:

[0102] FIG1 is a schematic diagram of the overall three-dimensional structure of a pre-packaging device for bulk commodities provided by an embodiment of the present invention (showing the spatial layout of each module);

[0103] Figure 2 is a side view of the pre-packaging device for bulk commodities in a pre-packaging state (showing the vertical arrangement of the weighing, sealing, and coding modules);

[0104] Figure 3 is an enlarged view of the sealing machine and the inkjet printer partial appearance (plywood, inkjet printer structure);

[0105] FIG4 is a schematic diagram of the technical solution structure of a pre-packaging device for bulk commodities (when the control switch is provided with a foot switch);

[0106] Figure 5: Control circuit block diagram (signal transmission and coordination logic);

[0107] Figure 6 is a flow chart of the method (corresponding to the pre-packaging method steps);

[0108] FIG7 is a schematic structural diagram of a technical solution for a folded flat bag provided by an embodiment of the present invention (first usage configuration);

[0109] FIG8 is a schematic diagram of the structure of FIG7 when the goods are placed;

[0110] Figure 9 is a schematic structural diagram of Figure 8 when the upper opening portion is heat-sealed to form a horizontal sealing line and the price tag barcode has been printed (the second use form, when the inner hems on both sides of the upper opening portion are aligned when sealed);

[0111] FIG10 is a schematic diagram of the technical solution structure of the “vest” bag formed after the tear portion of FIG9 is torn off (third usage form).

[0112] In the picture:

[0113] Electronic scale 1; weighing device 11; electronic scale pan 111; keyboard 112; control buttons 1121; weight sensor 113; controller 114; column 14; display screen 15; sealing machine 2; fixed splint 21; movable splint 22; connecting shaft 23; compression spring 24; drive motor 25; drive shaft 251; vertical plate unit 26; static inkjet printer 3; inkjet printer port 31; fastening screw 4; camera 5; plastic bag 6; upper opening 61; foot switch 7; wire 8; flat bag for pre-packaging bulk goods 9; inner fold line 91; inner fold edge 92; bag opening line 93; bag breaking line 94; vest bag 95; vest bag opening 96; bottom horizontal seal line 971; upper horizontal seal line 972; handle 98.

[0114] The following is a pseudo-code implementation of the control algorithm designed for a pre-packaging device for bulk goods, covering core functional modules such as weighing, visual recognition, sealing, and coding:

[0115] / / System initialization: configure hardware parameters, set default working parameters, and initialize status flags

[0116] PROCEDURE System_Init()

[0117] INIT Weight_Sensor / / Initialize the weighing sensor

[0118] INIT Camera / / Initialize the visual recognition camera

[0119] INIT Heating_Element / / Initialize the sealing heating element

[0120] INIT Stepper_Motor / / Initialize the stepper motor

[0121] INIT Inkjet_Printer / / Initialize the inkjet printer

[0122] INIT Touch_Screen / / Initialize the touch screen

[0123] INIT Foot_Pedal / / Initialize the foot switch

[0124] SET Default_Temp = 200 / / Set the default sealing temperature

[0125] SET Pressure_Threshold = 15 / / Set the sealing pressure threshold (N)

[0126] SET Timer = 0 / / Initialize the timer

[0127] END PROCEDURE

[0128] / / Main control loop: real-time monitoring of weighing and visual signals, providing human-computer interaction interface, coordinating various execution

[0129] / / Bank

[0130] PROCEDURE Main_Control_Loop()

[0131] WHILE TRUE DO

[0132] IF Weight_Stable() AND Object_Detected() THEN

[0133] Display_Product_Info() / / Display product information

[0134] IF Confirm_Action() THEN

[0135] Execute_Packaging() / / Execute packaging process

[0136] END IF

[0137] END IF

[0138] DELAY 100ms / / loop interval

[0139] END WHILE

[0140] END PROCEDURE

[0141] / / Weighing stability judgment: Use sliding window algorithm to dynamically adjust the stability threshold and filter instantaneous interference

[0142] FUNCTION Weight_Stable() RETURNS BOOLEAN

[0143] DEFINE Stability_Time = 2000 / / Stability time threshold (ms)

[0144] DEFINE Fluctuation = 0.1 / / Weight fluctuation threshold (g)

[0145] IF ABS(Current_Weight - Previous_Weight) < Fluctuation THEN

[0146] INCREMENT Timer

[0147] ELSE

[0148] RESET Timer

[0149] END IF

[0150] RETURN Timer >= Stability_Time

[0151] END FUNCTION

[0152] / / Visual recognition processing: target detection based on deep learning, multi-feature matching algorithm, confidence threshold

[0153] / / Value determination

[0154] FUNCTION Object_Detected() RETURNS BOOLEAN

[0155] CAPTURE Image FROM Camera

[0156] EXTRACT Features USING YOLOv5

[0157] MATCH Features WITH Product_Database

[0158] IF Confidence_Level > 95% THEN

[0159] RETURN TRUE

[0160] ELSE

[0161] RETURN FALSE

[0162] END IF

[0163] END FUNCTION

[0164] / / Packaging execution process: temperature PID control, pressure feedback adjustment, precise timing control

[0165] PROCEDURE Execute_Packaging()

[0166] / / Temperature control

[0167] SET_TEMP(Default_Temp)

[0168] WAIT_UNTIL Temp_Reached(Default_Temp ±5°C)

[0169] / / Sealing operation

[0170] ACTIVATE Stepper_Motor

[0171] WHILE Pressure_Sensor < Pressure_Threshold DO

[0172] STEP Motor_Forward

[0173] READ Pressure_Sensor

[0174] END WHILE

[0175] HOLD_POSITION(1500ms) / / Maintain sealing pressure

[0176] / / Synchronous inkjet printing

[0177] GENERATE Barcode_Data

[0178] PRINT Barcode USING Inkjet_Printer

[0179] / / Reset

[0180] STEP Motor_Backward TO Home_Position

[0181] RESET_ALL_SENSORS

[0182] END PROCEDURE

[0183] / / Exception handling: multiple fault detection, hierarchical alarm mechanism, automatic safety protection

[0184] PROCEDURE Error_Handling()

[0185] IF Motor_Stall OR Temp_Overflow OR Printer_Error THEN

[0186] ACTIVATE Buzzer

[0187] DISPLAY Error_Code ON Touch_Screen

[0188] LOG Error_Event TO System_Log

[0189] EXECUTE Emergency_Stop

[0190] END IF

[0191] END PROCEDURE

[0192] / / Foot switch processing: interrupt response mechanism, status check, anti-accidental touch design

[0193] INTERRUPT Foot_Pedal_ISR()

[0194] IF Foot_Pedal.Pressed THEN

[0195] IF System_Ready THEN

[0196] EXECUTE Execute_Packaging

[0197] ELSE

[0198] ACTIVATE Warning_LED

[0199] END IF

[0200] END IF

[0201] END INTERRUPT

[0202] Technical parameter description:

[0203] Typical value description of parameter items

[0204] Weighing stabilization time 2000ms Weight fluctuation <0.1g

[0205] Sealing temperature 200±5℃ PID control

[0206] Sealing pressure 15N pressure sensor feedback

[0207] The inkjet printing delay is 50ms and synchronized with the sealing action

[0208] Visual recognition confidence > 95% YOLOv5 algorithm

[0209] System response time <100ms Interrupt priority control Best Mode for Carrying Out the Invention

[0210] Example 8, as shown in Figures 4, 6, 7, and 9:

[0211] The bulk commodities are contained in the flat bag 9 for packaging bulk commodities in the first initial loading form of Example 7 shown in FIG7 , and the pre-packaging method for bulk commodities in Example 6 is performed by the pre-packaging device for bulk commodities in Example 3 shown in FIG4 according to the steps shown in FIG6 , and thus pre-packaged commodities in the second sealed packaging form as shown in FIG9 can be obtained. After the package is opened and the commodities are taken out, the flat bag 9 for packaging bulk commodities becomes a third vest bag form vest bag 95 for secondary use, and finally is divided into two by breaking the bag to become plastic waste in the fourth recycling and decomposition form. Modes for Carrying Out the Invention

[0212] In the description of the present invention, the word "including" mentioned in the specification and claims is an open-ended term and should be interpreted as "including but not limited to"; the terms "above", "below", "center", "bottom", "outside", etc., as well as the length and width ratios or positional relationships of the figures, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, structure and operation, and therefore should not be understood as limiting the present invention.

[0213] Example 1 (Basic Implementation)

[0214] As shown in Figures 1, 3, and 5, this bulk commodity pre-packaging device consists of the following modules:

[0215] 1. Weighing module

[0216] - The anti-skid weighing plate (111) is made of 6061-T6 aluminum alloy and has anti-skid grooves (0.5mm deep V-groove array) on the surface

[0217] - Cantilever load cell (113) with a range of 0.1g-30kg and a linearity error of <0.05%FS

[0218] - The main control unit (114) uses an ARM Cortex-M4 chip and is equipped with 128MB flash memory (for storing product database)

[0219] - Data transmission unit supports dual-mode communication:

[0220] - Wired interface: RS485 industrial bus

[0221] - Wireless connection: 4G module (model EC200T) and Wi-Fi 802.11ac

[0222] 2. Heat sealing actuator

[0223] - Fixing splint (21) integrated:

[0224] - Nickel-chromium alloy heating tape (thickness 0.2mm, operating temperature 200±5℃)

[0225] - K-type thermocouple temperature sensor (sampling frequency 10Hz)

[0226] - Movable splint (22) drive system:

[0227] - Electric linear actuator (stroke ≤ 300mm, 12V / 24V)

[0228] - Pressure buffer component: Polyurethane damper (elastic modulus 50MPa)

[0229] 3. Synchronous inkjet printing system

[0230] - Nozzle assembly (31) technical parameters:

[0231] - Resolution: 300dpi

[0232] - Printing speed: 0.5m / s

[0233] - Character height: 3-10mm adjustable

[0234] - Positioning mechanism:

[0235] - Three-axis adjustment bracket (X / Y / Z adjustment range ±15mm)

[0236] - Laser alignment device (wavelength 650nm, spot diameter 0.8mm)

[0237] 4. Control logic implementation

[0238] - Trigger conditions:

[0239] a) Weighing stability judgment: weight fluctuation is less than 0.1g for 3 consecutive seconds

[0240] b) Infrared proximity sensor detects that the packaging bag is in place (detection distance 10±2mm)

[0241] - Execution timing:

[0242] ① The drive motor (25) starts

[0243] ② Heat the heating belt by powering on (PID temperature control, slope 3℃ / s)

[0244] ③ When the distance between the splints is ≤2mm, the inkjet signal is triggered

[0245] ④ Sealing holding time 2.0s (pressure maintained at 15N±1N)

[0246] 5. Multi-mode operation interface

[0247] - Physical buttons (1121):

[0248] - Mechanical life> 1 million times

[0249] - IP67 protection grade

[0250] - Foot switch (7):

[0251] - Dual redundant micro switches

[0252] - Anti-slip bottom plate design (friction coefficient μ>0.8)

[0253] Example 2 (Visual Recognition Enhanced)

[0254] As shown in Figures 2, 3, and 5, this embodiment adds a visual recognition function based on Example 1. The specific technical features are as follows:

[0255] 1. Visual recognition system

[0256] -Image acquisition unit:

[0257] - Industrial cameras (5): 5 megapixels, 60fps, autofocus

[0258] - Installation angle: 45°±5° with the horizontal plane

[0259] - Light source configuration: Ring LED fill light (color temperature 5600K, illumination ≥1000lux)

[0260] -Image processing unit:

[0261] - Using YOLOv5 target detection algorithm

[0262] - Product recognition accuracy: 98.7% (test dataset: 1000 categories, 100 samples per category)

[0263] - Differentiation of multiple product specifications: Ability to identify different packaging specifications of the same product (error tolerance ±5%)

[0264] 2. Intelligent interactive interface

[0265] - Touch screen (15) technical parameters:

[0266] - Size: 10.1 inches

[0267] - Resolution: 1920×1200

[0268] - Touch points: 10-point touch

[0269] - Operation logic:

[0270] a) Real-time display of recognition results (product name, specifications, unit price)

[0271] b) Provide confirmation / correction interface (supports manual selection)

[0272] c) Generate operation logs (stored in the built-in 128GB SSD)

[0273] 3. Control process optimization

[0274] - Trigger conditions:

[0275] a) Image recognition confidence > 95%

[0276] b) Weight stability determination (fluctuation <0.1g for 2 consecutive seconds)

[0277] - Execution timing:

[0278] ① The touch screen (15) displays the confirmation interface

[0279] ② The operator clicks the confirm button

[0280] ③ Synchronous start of sealing (200ms) and coding (50ms)

[0281] Example 3 (Foot Control Type)

[0282] As shown in Figures 4, 3, and 5, this embodiment improves the control method based on Example 1, and the specific technical features are as follows:

[0283] 1. Foot control

[0284] - Mechanical structure:

[0285] - Pedal size: 200×150mm

[0286] - Stroke: 15±1mm

[0287] - Reset spring: 304 stainless steel, lifespan > 500,000 times

[0288] -Electrical characteristics:

[0289] - Dual redundant micro switches

[0290] - IP67 protection grade

[0291] - Cable length: 2m (customizable)

[0292] 2. Control logic optimization

[0293] - Trigger conditions:

[0294] a) Foot switch (7) pressure > 5N

[0295] b) Packaging bag arrival signal (infrared sensor detection)

[0296] - Execution timing:

[0297] ① Foot switch (7) trigger

[0298] ② Start sealing heating (preheating time 50ms)

[0299] ③Simultaneous sealing and coding

[0300] ④ Maintain pressure for 1.5 seconds and then reset automatically

[0301] 3. Security protection mechanism

[0302] - Emergency stop function:

[0303] - Double trigger: pressure > 50N or pedaling time > 3 seconds

[0304] - Automatic power-off protection

[0305] - Fault alarm:

[0306] - Buzzer prompt (85dB)

[0307] - LED indicator light (red / green dual color)

[0308] Example 4 (Basic Operation Type)

[0309] As shown in FIG6 , the pre-packaging method of the present invention is as follows:

[0310] Steps:

[0311] 1. Data configuration (S0):

[0312] - Import product data in batches (CSV format) via USB interface

[0313] - Establish local database index (B+ tree structure, query latency < 5ms)

[0314] 2. Weighing identification (S1-S2):

[0315] - The operator puts the product into an antistatic PE bag (thickness 0.08mm, friction coefficient μ=0.3)

[0316] - Electronic scale automatically performs dynamic tare (accuracy ±0.02g)

[0317] - Enter the product code (6-digit code) to trigger the database search

[0318] 3. Spray sealing execution (S3-S5):

[0319] - When the infrared sensor (wavelength 850nm) detects that the bag opening is in place (position error < 1mm)

[0320] - Synchronous start:

[0321] Heat sealing temperature PID control (set value 200℃, heating slope 5℃ / s)

[0322] Preheat the print head to 40°C (to prevent ink condensation)

[0323] - Pressure sensor (range 0-50N, accuracy 0.1%FS) real-time feedback adjustment

[0324] 4. Quality output:

[0325] - Sealing strength: ≥20N / 15mm (ASTM F88 standard test)

[0326] - Coding adhesion: passed 3M 810 tape peeling test

[0327] Example 5 (Visual Enhancement)

[0328] Improved on the basis of Example 4:

[0329] Technology upgrade:

[0330] 1. Image acquisition optimization:

[0331] - Uses a global shutter CMOS sensor (Sony IMX264)

[0332] - Configuring circular polarized light (eliminating surface reflection interference)

[0333] 2. Intelligent recognition upgrade:

[0334] - Deploy a lightweight recognition model (MobileNetV3-small, inference time < 50ms)

[0335] - Supports identification of multiple products (maximum 5 categories of products can be identified simultaneously, with a confidence level of >90%)

[0336] 3. Improvements in human-computer interaction:

[0337] - Augmented Reality (AR) interface: overlay product information onto the camera screen in real time

[0338] - Voice feedback function (supports Chinese / English bilingual broadcast)

[0339] Execution process:

[0340] - When the plastic bag is not transparent enough, the system will automatically prompt you to adjust the product placement angle

[0341] - Recognition results are displayed in order of confidence (TOP3 candidates), and subsequent processes are executed after manual confirmation

[0342] Example 6 (Industrial-grade control type)

[0343] Expanding on Example 5:

[0344] 1. Network integration:

[0345] - Support OPC UA protocol to access factory MES system

[0346] - Real-time data streaming (JSON format, 1Hz update frequency)

[0347] 2. Energy efficiency management:

[0348] - Intelligent sleep mode (standby power consumption <5W)

[0349] - Energy recovery system (brake energy conversion efficiency > 80%)

[0350] Execution process:

[0351] - Synchronous execution when the foot switch is triggered:

[0352] Assist in completing bag opening positioning

[0353] Pressure-temperature coupled control algorithm ensures consistent sealing quality

[0354] Example 7, as shown in Figures 7 to 10:

[0355] The present invention provides a flat bag for packaging bulk goods. In a first usage configuration, a folded-edge flat bag 9 has a bottom end provided with a bag opening line 93, which transversely spans the inner folded edges 92 on both sides. A bag tearing line 94 is provided above the bag opening line 93. The bag body is pre-printed with an inverted graphic, such as "sealed code." As shown in FIG7 , the bag tearing line 94 has two cutouts and is spaced apart from the bag opening line 93, thereby preventing the bag from being accidentally torn during unpacking. When in use, the flat bag 9 is heat-sealed at its upper opening, transforming into a second usage configuration, a sealed package. The bag is then torn open along the bag opening line 93 and the film film surrounding the bag opening line 93 and the bottom edge is removed from the bag body, revealing a "vest bag" opening 96. The flat bag 9 can then be transformed into a third usage configuration, a "vest bag" 95 with dual shoulder "handles" 98, as shown in FIG10 . The resulting "vest bag" 95 is identical to a conventional vest shopping bag. The third use mode is shown in FIG10 , where the bag breaking line 94 is spaced a certain distance from the bag opening.

[0356] Example 8, the best embodiment of the comprehensive application of the present invention, as shown in Figures 4, 6, 7, and 9:

[0357] The bulk commodities are contained in the flat bag 9 for packaging bulk commodities in the first initial loading form of Example 7 shown in FIG7 , and the pre-packaging method for bulk commodities in Example 6 is performed by the pre-packaging device for bulk commodities in Example 3 shown in FIG4 according to the steps shown in FIG6 , and thus pre-packaged commodities in the second sealed packaging form as shown in FIG9 can be obtained. After the package is opened and the commodities are taken out, the flat bag 9 for packaging bulk commodities becomes a third vest bag form vest bag 95 for secondary use, and finally is divided into two by breaking the bag to become plastic waste in the fourth recycling and decomposition form. Industrial Applicability

[0358] 1. Improved production efficiency

[0359] -Automated Process Integration: This device integrates weighing, sealing, and coding functions, enabling one-click operation and reducing manual intervention. For example, the coordinated control of the weighing sensor and drive motor can complete a single package in just 3 seconds, more than three times the efficiency of traditional manual operation.

[0360] -Multi-task synchronous execution: Sealing and coding are performed synchronously (error time window ≤ 100ms), avoiding the time waste of step-by-step operation.

[0361] 2. Multi-industry adaptability

[0362] - Food Industry: Suitable for bulk snacks, dry goods, etc. The anti-stick plywood design can handle oily and powdery materials and meets food safety standards.

[0363] -Pharmaceutical industry: A built-in vacuum pump enables vacuum packaging; the coding information includes drug batch, expiration date, and EPCIS event records, supporting full lifecycle quality traceability.

[0364] 3. Intelligence and future scalability

[0365] -IoT integration: Remote monitoring and maintenance are achieved through 4G / Wi-Fi modules, and data can be uploaded to the MES system in real time.

[0366] - Environmentally friendly design: save labels, reduce carbon emissions, and comply with international environmental standards such as EU RoHS. Sequence Listing Free Content

[0367] Type your sequence listing free description paragraph here.

Claims

1. A bulk commodity pre-packaging device, characterized in that: include: - Electronic scale module, including a weighing sensor, a controller and a display screen. The weighing sensor is used to obtain product weight data; - a sealing machine module, mounted on top of the electronic scale module, comprising a fixed clamping plate, a movable clamping plate, and a drive motor. The drive motor controls the opening and closing movement of the movable clamping plate relative to the fixed clamping plate; - A static inkjet printer module, fixed to the side of the fixed splint, comprising a movable inkjet printer head and an inkjet printer controller; - a control switch, electrically connected to the controller; Wherein, the controller is configured to: in response to the trigger signal of the control switch, synchronously start the sealing operation of the sealing machine module and the coding operation of the static inkjet printer module.

2. The pre-packaging device according to claim 1, characterized in that The sealing machine module also includes: the working temperature of the heating element arranged in the fixed clamping plate is dynamically adjusted through the PID algorithm; the vertical plate unit arranged on the side of the movable clamping plate ensures that the bag opening of the packaging bag is in a flat state during sealing.

3. The pre-packaging device according to claim 1, characterized in that The static inkjet printer module also includes: a three-axis adjustable mounting bracket, which makes the inkjet direction of the nozzle parallel to the movement plane of the movable clamping plate; and a contact trigger sensor, which automatically activates the inkjet operation when the movable clamping plate moves to a preset sealing position.

4. The pre-packaging device according to claim 1, characterized in that The control switch is a multimodal operation interface, including: a physical button provided on the electronic scale module operation panel; a touch virtual button integrated on the display screen; and a foot switch connected by a cable, with dual redundant contact points.

5. The pre-packaging device according to claim 1, characterized in that: The coding content of the static inkjet printer module includes: plain text digital information of weight, unit price, and total price; encrypted verification code and QR code, and the QR code is associated with blockchain product traceability information.

6. The pre-packaging device according to claim 1, characterized in that: The operation sequence executed by the controller includes: activating the sealing ready signal after the weighing data is stable; after receiving the control switch trigger signal, synchronously starting the heating element to heat up, driving the motor to close the splint, and the inkjet printer controller to generate printing data; completing the inkjet printer operation when the splint is fully closed, and the error time window is ≤100ms.

7. A flat bag for packaging bulk goods, characterized by: The flat bag has inner folds on both sides; the flat bag has a bag opening line at the bottom end thereof, the bag opening line being an inverted U-shaped tear line, with the U-shaped opening facing the bottom of the flat bag for bulk commodity packaging; the bag opening line transversely spans the inner folds on both sides of the flat bag; The flat bag body is provided with a bag breaking line, which is a tearing line along the film pulling direction MD of the flat bag body; the bag breaking line is close to the bag opening line and above the bag opening line; Through the coordinated action of the bag opening line and the bag breaking line, the bag body sequentially presents a shape conversion chain of: a first initial loading shape → a second sealed packaging shape → a third vest bag shape → a fourth recycling and decomposition shape.

8. A method for prepackaging bulk commodities, characterized in that: The method is performed by the bulk commodity pre-packaging device according to any one of claims 1 to 6, using the flat bag for bulk commodity packaging according to claim 7, comprising the following steps: (a) Pre-storage of product information: Establishing a database containing product images, codes, unit prices, and specifications, which supports cloud synchronization and local encrypted storage; (b) Dynamic weighing and recognition: The weight of the packaged goods is obtained through a high-precision weighing sensor, while the product image is captured by a camera and matched with the database; (c) Information processing and display: generating pricing data including product name, unit price, weight, total amount, and sealing time based on the matching results, and displaying a confirmation interface on the touch screen; (d) Collaborative control triggering: When the opening of the packaging bag is positioned in the preset area, an execution instruction is issued through at least one of a physical button, a touch screen button, or a foot switch; (e) Synchronous sealing and coding: The drive motor controls the closing of the movable splint to complete the heat sealing operation. At the same time, the static inkjet printer prints the price tag information containing plain text data and encrypted graphic code in the sealing area. The sealing temperature, pressure and coding timing are closed-loop controlled by the PID algorithm.

9. The prepackaging method according to claim 8, characterized in that: The encrypted graphic code is a QR code that complies with the GS1 standard, and the encoded content includes: - Plain text area: product name, weight, unit price, total amount and sealing time; - Encrypted area: Blockchain hash value and EPCIS event record, where the hash value is generated using the SHA-3 algorithm.

10. The prepackaging method according to claim 8, characterized in that: The triggering conditions for executing the instruction are: - The product information displayed on the touch screen is manually confirmed; - The bag position sensor and pressure sensor output ready signals at the same time; - The system self-check status remains fault-free for more than 5 seconds.

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