Automatic weighing and packaging device for small material bags

Abstract

The utility model belongs to packaging technical field especially relates to a small material bag automatic weighing packaging device, including screw feeder, weighing hopper, drip funnel jar, small material bag packaging machine and control system, screw feeder is connected with control system, is used for controlling the discharge rate of screw feeder, weighing hopper is connected with control system, is used for controlling the opening and closing of unloading valve, drip funnel jar is connected with control system, is used for controlling the opening and closing of solenoid valve, small material bag packaging machine is connected with control system, is used for controlling the packaging speed of small material bag packaging machine, the inlet of screw feeder is connected with the tank mouth of mixed material storage jar, the discharge port of screw feeder is connected with the inlet of weighing hopper, the discharge port of weighing hopper is connected with the inlet of drip funnel jar, the discharge port of drip funnel jar is located small material bag packaging machine top. Through the weighing hopper and drip funnel jar carry out the weighing of stage, has realized small material bag high accuracy automatic weighing packaging.

Description

Technical Field

[0001] This utility model belongs to the field of packaging technology, and in particular relates to an automatic weighing and packaging device for small material packets. Background Technology

[0002] Small ingredient packets are widely used in the food, catering, and pharmaceutical industries. In daily life, they are used for seasonings, food additives, beverage ingredients, and pharmaceutical excipients. However, with the growing demand in the consumer market for personalized formulas and precise quantities, the traditional manual weighing and packaging method for small ingredient packets suffers from inefficiency, poor accuracy, and high hygiene risks.

[0003] Therefore, people have tried to use automated equipment for weighing and packaging small material packages. The dust-free feeding reduces the hygiene risks of manual weighing and packaging, and the automated feeding speeds up the efficiency. However, the weighing sensors are affected by material impact and mechanical vibration when running at high speed, which increases the error and the accuracy problem of automatic weighing and packaging of small material packages cannot be well solved. Utility Model Content

[0004] The purpose of this invention is to provide an automatic weighing and packaging device for small material packages, which aims to solve the problem of low weighing and packaging accuracy of small material packages in the prior art, and realize high-precision automatic weighing and packaging of small material packages.

[0005] To achieve the above objectives, this utility model provides an automatic weighing and packaging device for small ingredient packages, comprising a screw feeder, a weighing funnel, a drip funnel, a small ingredient package packaging machine, and a control system, wherein:

[0006] The screw feeder is connected to the control system to control its discharge speed; the weighing funnel is connected to the control system to control the opening and closing of the discharge valve; the dripping funnel is connected to the control system to control the opening and closing of the solenoid valve; the small-package packaging machine is connected to the control system to control its packaging speed; the screw feeder's inlet is connected to the outlet of the mixed material storage tank; the screw feeder's outlet is connected to the weighing funnel's inlet; the weighing funnel's outlet is connected to the dripping funnel's inlet; the dripping funnel's outlet is located above the small-package packaging machine.

[0007] The weighing funnel includes a funnel container, a first weighing sensor, and a discharge valve; the discharge port of the screw feeder is connected to the inlet of the funnel container; the bottom of the funnel container is inclined downward along the horizontal plane; the bottom of the funnel container is connected to the first weighing sensor; the first weighing sensor is used to detect the weight of the material in the funnel container in real time and generate a first sensing signal; the discharge valve covers the discharge port of the funnel container, and the discharge of the material is controlled by controlling the opening and closing of the discharge valve;

[0008] The drip funnel includes a funnel container, a second weighing sensor, and an electromagnetic valve; the inlet of the funnel container and the outlet of the funnel container are connected by a connecting pipe; the funnel container is equipped with the second weighing sensor; the second weighing sensor is used to detect the weight of the material in the funnel container in real time and generate a second sensing signal; the electromagnetic valve is located at the front end of the outlet of the funnel container.

[0009] As an optional embodiment of this utility model, a first support member is connected to the bottom inclined surface of the funnel container; the bottom of the first support member is parallel to the horizontal plane; the bottom of the first support member is vertically connected to the top of the first weighing sensor, for uniformly transmitting the gravity of the funnel container to the first weighing sensor in the vertical direction.

[0010] As an optional embodiment of this utility model, the side of the container is provided with a second support member; the second support member includes an upper support plate and a lower support plate; the second weighing sensor is disposed between the upper support plate and the lower support plate.

[0011] As an optional solution of this utility model, the contact area between the upper support plate and the lower support plate is larger than the contact area of ​​the second weighing sensor, so as to uniformly transmit the weight of the container.

[0012] As an optional embodiment of this invention, the discharge port radius of the funnel is one-tenth of the inlet radius of the funnel.

[0013] As an optional embodiment of this invention, the first weighing sensor and the unloading valve are connected to the control system; the control system is used to receive the first sensing signal and send a first control signal to the motor on the drive shaft of the unloading valve.

[0014] As an optional embodiment of this invention, the second weighing sensor and the solenoid valve are connected to the control system; the control system is used to receive the second sensing signal and send a second control signal to the solenoid valve.

[0015] The above-mentioned technical solutions of one or more technical solutions in the automatic weighing and packaging device for small material packages provided in this embodiment of the utility model have at least one of the following technical effects:

[0016] This application provides an automatic weighing and packaging device for small material packages. The control system controls the motor speed of the screw feeder, thereby controlling the speed of the screw assembly inside the screw feeder to achieve stable and uniform feeding, avoiding the impact of irregular material impacts on the first weighing sensor. A weighing funnel is installed at the discharge port of the screw feeder, and the opening and closing of the discharge valve is jointly controlled by the first weighing sensor, the control system, and the drive motor, achieving initial weighing control. This ensures that each discharge from the weighing funnel is controlled within the required first mass range, reducing the impact of material impacts on the second weighing sensor. A drip funnel is installed at the discharge port of the weighing funnel, and the opening and closing of the solenoid valve is jointly controlled by the second weighing sensor and the control system, achieving second-order weighing control. This ensures that each discharge from the drip funnel is the second mass required for the small material package. This invention achieves high-precision automatic weighing and packaging of small material packages through phased weighing from coarse to fine by using the weighing funnel and the drip funnel. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an automatic weighing and packaging device for small material packets according to this utility model.

[0019] Figure 2 This is a schematic diagram of the weighing funnel of an automatic weighing and packaging device for small material packets according to this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the drip funnel jar of the automatic weighing and packaging device for small material packets according to this utility model.

[0021] Figure 4 This is a schematic diagram of the motor drive structure of an automatic weighing and packaging device for small material packets according to this utility model.

[0022] Figure 5 This is a schematic diagram of the structure of a small material package packaging machine, which is an automatic weighing and packaging device for small material packages according to this utility model.

[0023] The following are the labeling elements in the figure:

[0024] 1. Screw feeder; 2. Weighing funnel; 3. Drip funnel container; 4. Small material bag packaging machine; 5. Control system; 201. Funnel container; 202. First weighing sensor; 203. Discharge valve; 2021. First support component; 2022. Fixing component; 2023. Base plate; 2031. Drive shaft; 2032. Drive motor; 301. Funnel container; 302. Second weighing sensor; 303. Solenoid valve; 304. Void relief groove; 3011. Second support component; 3021. Upper support plate; 3022. Lower support plate; 401. Longitudinal sealing mechanism; 402. Horizontal sealing mechanism; 403. Small material bag slide; 404. Pulley; 405. Hot melt fixing component. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] In a specific embodiment 1 of this utility model, referring to Figure 1 An automatic weighing and packaging device for small ingredient packages is provided, comprising a screw feeder 1, a weighing funnel 2, a drip funnel 3, a small ingredient package packaging machine 4, and a control system 5, wherein:

[0030] The feed inlet of the screw feeder 1 is connected to the discharge outlet of the mixed material storage tank; the discharge outlet of the screw feeder 1 is connected to the feed inlet of the weighing funnel 2; the discharge outlet of the weighing funnel 2 is connected to the feed inlet of the dripping funnel tank 3, and the material flows sequentially from the mixed material storage tank to the screw feeder 1, the weighing funnel 2, and the dripping funnel tank 3.

[0031] Specifically, the outlet of the mixed material storage tank extends into the inlet at the top of the screw feeder 1 to prevent material spillage; the outlet of the screw feeder 1 extends into the inlet of the weighing funnel 2 to prevent material spillage; the outlet of the weighing funnel 2 is connected to the inlet of the dripping funnel 3 via a connecting pipe, with one end of the connecting pipe extending into it; the other end of the connecting pipe extends into the inlet of the dripping funnel 3 to prevent material spillage; the outlet of the dripping funnel is located at the center above the small material bag packaging machine 4, and during operation, the outlet of the dripping funnel extends into the opening of the packaging bag to prevent material spillage.

[0032] The control system 5 is located at the upper left corner of the small material package packaging machine 4; the drip funnel 3 and the weighing funnel 2 are located on the base plate 2023 above the small material package packaging machine 4; the screw feeder 1 is connected to the control system 5 and is used to control the discharge speed of the screw feeder 1; the weighing funnel 2 is connected to the control system 5 and is used to control the opening and closing of the discharge valve 203; the drip funnel 3 is connected to the control system 5 and is used to control the opening and closing of the solenoid valve 303; the small material package packaging machine 4 is connected to the control system 5 and is used to control the packaging speed of the small material package packaging machine 4.

[0033] The control system 5 sends a control signal to the motor at the top of the screw feeder 1. The screw feeder 1 controls the rotation speed of the screw assembly in the hopper container according to the control signal. The material is evenly discharged from the discharge port of the screw feeder 1 under the drive of the screw assembly, thus controlling the discharge speed of the screw feeder.

[0034] Reference Figure 2The weighing funnel 2 includes a funnel container 201, a first weighing sensor 202, and a discharge valve 203. The bottom of the funnel container 201 slopes downwards, facilitating material concentration at the bottom and complete discharge within a short time. A first support member 2021 is connected to the bottom slope of the funnel container 201, and the first support member 2021 is vertically connected to the first weighing sensor 202, uniformly transferring the weight of the funnel container 201 to the first weighing sensor 202 in the vertical direction. A fixing member 2022 is connected to the bottom of the first weighing sensor 202, and the fixing member 2022 is fixed to the base plate 2023. The first weighing sensor 202 detects the weight of the material in the funnel container 201 in real time and generates a first sensing signal. The first weighing sensor 202 is connected to the control system 5 and transmits the first sensing signal to the control system 5. The control system 5 compares the weight information of the first sensing signal with the preset first unloading weight information and issues a first control signal. The first control signal can be a low level, that is, keep the unloading valve 203 in the closed state; or it can be a high level, that is, adjust the unloading valve 203 to the open state.

[0035] In a preferred embodiment, the discharge valve 203 is fixed to the outlet of the funnel container 201 by a fastener; a drive shaft 2031 passes through the discharge valve 203; see reference Figure 4 A motor 2032 is also connected to the drive shaft 2031. The motor 2032 is connected to the control system 5, receives the first control signal issued by the control system 5, and drives the drive shaft 2031 to rotate according to the first control signal. The drive shaft 2031 drives the unloading valve 203 to open and close.

[0036] Reference Figure 3 The drip funnel 3 includes a funnel container 301, a second weighing sensor 302, and a solenoid valve 303. A second support member 3011 is provided on the side of the funnel container 301. An upper support plate 3021 and a lower support plate 3022 are provided at the bottom end of the second support member 3011. The second weighing sensor 302 is located between the upper support plate 3021 and the lower support plate 3022. The lower support plate 3022 is fixed to the base plate 2023. The second weighing sensor 302 protrudes from the surface of the lower support plate 3022. The pressing surface of the upper support plate 3021 covers the force-bearing surface of the second weighing sensor 302. The area of ​​the pressing surface of the upper support plate 3021 is larger than the force-bearing surface of the second weighing sensor 302, preventing partial contact between the upper support plate 3021, the lower support plate 3022, and the second weighing sensor 302, thus ensuring that the weight of the funnel container 301 is evenly transmitted to the second weighing sensor 302.

[0037] The base plate 2023 is provided with a clearance groove 304. The clearance groove 304 is located above the packaging work area of ​​the small material bag packaging machine 4, so that the discharge port of the hopper container 301 faces the packaging work area. The clearance groove 304 is used to clear the bottom of the hopper container 301, so that the second weighing sensor 302 can accurately measure the weight of the material in the dripping hopper 3.

[0038] The second weighing sensor 302 detects the weight of the material inside the hopper container 301 in real time and generates a second sensing signal. The second weighing sensor 302 is connected to the control system 5 and transmits the second sensing signal to the control system 5. The control system 5 compares the weight information from the second sensing signal with a preset second unloading weight and issues a second control signal. The first control signal can be a low level, i.e., keeping the solenoid valve 303 closed; or it can be a high level, i.e., adjusting the solenoid valve 303 to the open state. The solenoid valve 303 is connected to the control system 5, receives the second control signal from the control system 5, and controls the opening and closing of the solenoid valve 303 according to the second control signal. The solenoid valve 303 is located 1 cm in front of the discharge port of the hopper container 301 to reduce discharge errors; if the distance between the solenoid valve 303 and the discharge port is too large, residual material will remain at the discharge port after the solenoid valve 303 is closed.

[0039] As a preferred embodiment, the present invention provides a combined structure of three sets of second weighing sensors 302 and second support members 3011, which are evenly arranged along the side of the container 301.

[0040] In a preferred embodiment, the outlet radius of the drip funnel 3 is one-tenth of the inlet radius of the drip funnel 3.

[0041] In a preferred embodiment, the preset first unloading weight is 10 times the packaging weight of the small material package. This reduces the number of unloading operations of the weighing funnel 2 while balancing the unloading weight, further reducing the impact of material impact.

[0042] In a preferred embodiment, the opening time of the discharge valve 203 does not coincide with the opening time of the solenoid valve 303, thus avoiding weight detection errors caused by the simultaneous feeding and discharging of the drip funnel.

[0043] Reference Figure 5 The small material package packaging machine 4 includes a longitudinal sealing mechanism 401, a transverse sealing mechanism 402, a small material package slide 403, a pulley 404, and a heat-melting fixing component 405. The longitudinal sealing mechanism 401 is located below the drip funnel jar 3. The heat-melting fixing component 405 is located below the longitudinal sealing mechanism 401. The transverse sealing mechanism 402 is located below the heat-melting fixing component 405. The small material package slide 403 is located below the transverse sealing mechanism 402. The pulley 404 is located at the bottom of the small material package packaging machine 4 and is used to move the automatic weighing and packaging device for small materials packages.

[0044] Before material is discharged from the outlet of the drip funnel tank 3, the two sides of the composite film are heat-sealed by the heat-melting fastener 405; then the longitudinal sealing mechanism 401 seals the heat-sealed composite film to obtain the first packaging bag with side sealing; after the longitudinal sealing is completed, the material is discharged from the outlet of the drip funnel tank 3 into the first packaging bag with side sealing; after the material is discharged, the transverse sealing mechanism 402 seals the top of the first packaging bag with side sealing and the bottom of the next second packaging bag at the same time; after the sealing is completed, the transverse sealing mechanism 402 cuts the first packaging bag and the second packaging bag; after the first packaging bag is cut, it falls into the small material bag chute 403.

[0045] This application provides an automatic weighing and packaging device for small material packages. A screw feeder and control system achieve stable and uniform feeding, avoiding the impact of irregular material impacts on the first weighing sensor. A weighing funnel is installed at the outlet of the screw feeder, and the opening and closing of the discharge valve are jointly controlled by the first weighing sensor, the control system, and the drive motor, achieving initial weighing control. This ensures that each discharge from the weighing funnel is within the required first mass range, reducing the impact of material impacts on the second weighing sensor. A drip funnel is installed at the outlet of the weighing funnel, and the opening and closing of the solenoid valve are jointly controlled by the second weighing sensor and the control system, achieving second-order weighing control. This ensures that each discharge from the drip funnel is within the required second mass for the small material package. This invention achieves high-precision automatic weighing and packaging of small material packages through phased weighing from coarse to fine by using the weighing funnel and the drip funnel.

[0046] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic weighing and packaging device for small ingredient packets, characterized in that, Includes a screw feeder, weighing funnel, drip funnel, small material packaging machine, and control system, among which: The screw feeder is connected to the control system to control its discharge speed; the weighing funnel is connected to the control system to control the opening and closing of the discharge valve; the dripping funnel is connected to the control system to control the opening and closing of the solenoid valve; the small-package packaging machine is connected to the control system to control its packaging speed; the screw feeder's inlet is connected to the outlet of the mixed material storage tank; the screw feeder's outlet is connected to the weighing funnel's inlet; the weighing funnel's outlet is connected to the dripping funnel's inlet; the dripping funnel's outlet is located above the small-package packaging machine. The weighing funnel includes a funnel container, a first weighing sensor, and a discharge valve; the discharge port of the screw feeder is connected to the inlet of the funnel container; the bottom of the funnel container is inclined downward along the horizontal plane; the bottom of the funnel container is connected to the first weighing sensor; the first weighing sensor is used to detect the weight of the material in the funnel container in real time and generate a first sensing signal; the discharge valve covers the discharge port of the funnel container, and the discharge of the material is controlled by controlling the opening and closing of the discharge valve; The drip funnel includes a funnel container, a second weighing sensor, and an electromagnetic valve; the inlet of the funnel container and the outlet of the funnel container are connected by a connecting pipe; the funnel container is equipped with the second weighing sensor; the second weighing sensor is used to detect the weight of the material in the funnel container in real time and generate a second sensing signal; the electromagnetic valve is located at the front end of the outlet of the funnel container.

2. The automatic weighing and packaging device for small material packets according to claim 1, characterized in that, The bottom slope of the funnel container is connected to a first support member; the bottom of the first support member is parallel to the horizontal plane; the bottom of the first support member is vertically connected to the top of the first weighing sensor, for uniformly transmitting the gravity of the funnel container to the first weighing sensor in the vertical direction.

3. The automatic weighing and packaging device for small material packets according to claim 1, characterized in that, The container is provided with a second support member on its side; the second support member includes an upper support plate and a lower support plate; the second weighing sensor is located between the upper support plate and the lower support plate.

4. The automatic weighing and packaging device for small material packets according to claim 3, characterized in that, The contact area between the upper support plate and the lower support plate is larger than the contact area of ​​the second weighing sensor, which is used to uniformly transmit the weight of the container.

5. The automatic weighing and packaging device for small material packets according to claim 1, characterized in that, The outlet radius of the drip funnel is one-tenth the inlet radius of the drip funnel.

6. The automatic weighing and packaging device for small material packets according to claim 1, characterized in that, The first weighing sensor and the unloading valve are connected to the control system; the control system is used to receive the first sensing signal and send a first control signal to the motor on the drive shaft of the unloading valve.

7. The automatic weighing and packaging device for small material packets according to claim 1, characterized in that, The second weighing sensor and the solenoid valve are connected to the control system; the control system is used to receive the second sensing signal and send a second control signal to the solenoid valve.

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