After more than ten years of development and research, our company's series of tea bag packaging machines (CCFD6, DXDC8I, DXDC8IA, DXDC8IB, DXDC8II, DXDC15, DXDC8IV, ...) have in the domestic mid-range tea machine market. Certain advantages, and sold in foreign countries. In recent years, with the rapid development of the health care products industry, many teabag manufacturers have begun to enter the production and processing of health tea beverages. Due to the wide variety of materials and the "expensive" price, the added value of production and processing is high, which makes the user's packaging dose measurement accuracy of the tea bag machine very high. At the same time, due to the poor fluidity of some materials added with health care products, the original cutting measurement system of the tea bag machine can not meet the requirements of users for the measurement accuracy of such packaging materials, or even block due to the bonding of materials. The nozzle can not complete the continuous cutting action. Therefore, the widening of the adaptability of packaging materials for the tea bagging system is a market demand, and also meets the original intention of our company to further expand the tea bag machine marketing market.
Taking the adaptive transformation of the DXDC8II tea bag machine cutting system for a certain user as an example, the specific application of some special process measures in the tea bag machine cutting system is discussed.
1 The working principle of the tea bag machine cutting system The material metering method of the tea bag machine adopts the volumetric rotor metering (as shown in Figure 1). The clockwise/counterclockwise rotation of the metering knob (No. 3) can be along the axis of the metering rotor (No. 5). Move the adjustment sleeve (No. 4) to the left/right direction, and then change the filling length of the material in the filling groove (semi-circular cross section) of the metering rotor. Since the packing dose of the material is determined by multiplying the number of grooves of the measuring rotor per unit time by the filling amount of the material in the single filling tank, the metering knob can adjust the packed dose of the material. The metering process of the tea bag machine is: the packaged material enters the measuring chamber of the casing (No. 2) from the hopper (No. 1), and a certain amount of the packaged material is sent into the discharging nozzle (No. 7) after being metered by the measuring rotor. Then, by the control of the lower nozzle through the shutter (No. 8), the specified amount of the packaged material is sent into the bag packaging material in the tea bag machine to complete the blanking measurement function.
(1). The material mixing device of the hopper of the packaging machine is not provided with the forced material flow, which causes the material in the hopper to be easy to “cluster†during the working process, which is characterized by difficulty in continuous feeding of the lower nozzle; The pore size is small, and the pore wall adhesive material gradually increases with the continuous operation of the packaging machine, which often causes the clogging of the lower nozzle to occur frequently.
(2). The unstable packaging dose, even the difficulty of continuous feeding, is caused by the “stock†and “sticky material†in the metering and falling process. The structural design of "A" and "B" in Fig. 1 is unreasonable (there are steps), which is the direct cause of "stocking". It is precisely because of the existence of “integration material†that some of the materials accumulated at “A†and “B†will fall into the subsequent metered materials from time to time, thus producing a packaging dose. Unstable.
3 Tea bag machine cutting metering system transformation plan and technical points The improved material cutting metering structure is shown in Figure 2.
(1) Add a stirring device (No. 7) to the hopper (No. 6) to improve the fluidity of the material.
Figure 2 is a schematic view of the structure of the improved blanking metering device 1-Unloading nozzle 2-Vibration sleeve 3-seat 4-pillar 5-feed sleeve 6-hopper 7-mixer 8-shell 9-metering knob 10-adjustment sleeve 11-metering rotor 12-dust ring 13- Movable hopper 14 - Vibrating pin 15 - Valve 16 - Picker 17 - Spring 18 - Locking screw (2). Increase the hole diameter of the lower nozzle (No. 1), and change the cutting nozzle from the overall machining scheme to the combined machining scheme so that The excessive portion of the nozzle cavity can be designed to facilitate a smooth curved surface for material flow.
(3). Increase the scratch and cushioning device (Nos. 16 and 17 in Fig. 2) to solve the surface sticking problem of the metering rotor (No. 11).
(4). Improve the specific structure of the design blanking channel, as shown in Figure 2, the addition of the material sleeve (No. 5), to prevent the material from accumulating at the "A" and "B" positions in Figure 1 during the blanking process. Phenomenon (the upper end surface of the receiving sleeve is tangent to the lower circumferential surface of the metering rotor); increase the tightening screw (No. 18) to prevent the adapter sleeve (No. 10) from moving during the operation of the device.
Ensure the accuracy of the metering of the equipment; add the vibration pin (No. 14) and other parts on the lower nozzle (No. 1) to prompt the movable hopper (No. 13) and the vibrating material sleeve (No. 2) to make a quick up and down in the working process of the metering and packaging system. Reciprocating vibration, its working principle is: the up and down reciprocating motion of the shutter (No. 15) pushes the vibration pin to drive the movable hopper and the vibrating sleeve to make a fast up and down reciprocating vibration. Due to the vibration of the movable hopper and the vibrating sleeve, the flow of the material in the entire blanking passage can be promoted, and the occurrence of "stickiness" on the surface of the parts such as the lower nozzle can be avoided or reduced.
(5). In order to facilitate the regular inspection and maintenance of the parts such as the movable hopper and the metering rotor in the blanking passage, a quick disassembly and installation device (shown in Fig. 3) is added to the structural design of the blanking passage. How to use: Turn the dust ring (No. 2) so that the semi-circular notch is directly supported (No. 1) to move the dust ring up and down. Remove the dust ring and conveniently view from the observation port shown in Figure 3.2. To the relevant situation, in order to achieve the purpose of convenient inspection during the work of the equipment.
Figure 3.1 Schematic diagram of the quick installation structure
Figure 3.2 Schematic diagram of the quick disassembly structure 1-pillar 2 - dust-proof ring 3 - screw 4 - movable hopper 4 tea bag machine cutting metering system transformation effect Since the transformation design is based on actual production conditions, the completed material cutting system is very suitable for the user's existing production The conditions have achieved very good transformation results. It completely solves the "integration material" problem in the packaging measurement process of the equipment at the user, obviously improves the "sticky material" condition, ensures the accuracy of the metering of the equipment, and satisfies the needs of the user.
5 Conclusion The transformation of the tea bag machine cutting system is based on the user's production conditions on the basis of the original work process and structure of the equipment, from the transformation cost and structural optimization aspects have been fully demonstrated. Through the research on the use condition of the equipment at the user and the characteristics of the materials to be packaged, after many times of bottoming test, the design intention of “closed†type feeding channel and vibration feeding, quick disassembly and installation was introduced in the formulation of the transformation plan. The transformation work has achieved the ultimate success of Zui. Among them, the feeding sleeve matched with the metering rotor and the movable hopper and vibrating nozzle which promote the blanking play a key role in the improved design.
The research on the "adaptive transformation of the measuring system of the bagged tea packaging machine" has been carried out to improve the stability and reliability of the materials with poor fluidity during the packaging measurement process such as filling, metering and blanking. The practical significance, it fully broadens the adaptability of the company's existing series of tea bagging machine cutting materials to different materials, to meet the needs of the market.
Taking the adaptive transformation of the DXDC8II tea bag machine cutting system for a certain user as an example, the specific application of some special process measures in the tea bag machine cutting system is discussed.
1 The working principle of the tea bag machine cutting system The material metering method of the tea bag machine adopts the volumetric rotor metering (as shown in Figure 1). The clockwise/counterclockwise rotation of the metering knob (No. 3) can be along the axis of the metering rotor (No. 5). Move the adjustment sleeve (No. 4) to the left/right direction, and then change the filling length of the material in the filling groove (semi-circular cross section) of the metering rotor. Since the packing dose of the material is determined by multiplying the number of grooves of the measuring rotor per unit time by the filling amount of the material in the single filling tank, the metering knob can adjust the packed dose of the material. The metering process of the tea bag machine is: the packaged material enters the measuring chamber of the casing (No. 2) from the hopper (No. 1), and a certain amount of the packaged material is sent into the discharging nozzle (No. 7) after being metered by the measuring rotor. Then, by the control of the lower nozzle through the shutter (No. 8), the specified amount of the packaged material is sent into the bag packaging material in the tea bag machine to complete the blanking measurement function.
Figure 1 Schematic diagram of the material metering device
1- hopper 2 - housing 3 - metering knob 4 - adjustment sleeve 5 - metering rotor 6 - seat 7 - lower nozzle 8 - valve 2 tea bag machine cutting system measurement system for poor stability analysis from the tea bag machine measurement process and The structural principle can be seen that the material flows into the entire section of the lower nozzle after being metered, and the flow of the material is always in a free falling state. Therefore, it is normal for a material having poor fluidity to have a poor measurement accuracy or even a difficult material to be cut in the above-mentioned metering system. Since the packaged material used by the user is a highly viscous powder-like synthetic health-care drug, the weight is relatively light and is a powdery crude drug, and has a relatively strong adhesion, resulting in the packaging accuracy of the existing tea bag machine cutting system is not up to standard. The user's request, while running for a long time, also has the situation that the lower nozzle is blocked, and it is difficult to achieve continuous cutting and packaging. After many rounds of research and on-site sampling to the user, we analyzed the main reasons that affect the continuous cutting and metering accuracy of the tea bag machine: (1). The material mixing device of the hopper of the packaging machine is not provided with the forced material flow, which causes the material in the hopper to be easy to “cluster†during the working process, which is characterized by difficulty in continuous feeding of the lower nozzle; The pore size is small, and the pore wall adhesive material gradually increases with the continuous operation of the packaging machine, which often causes the clogging of the lower nozzle to occur frequently.
(2). The unstable packaging dose, even the difficulty of continuous feeding, is caused by the “stock†and “sticky material†in the metering and falling process. The structural design of "A" and "B" in Fig. 1 is unreasonable (there are steps), which is the direct cause of "stocking". It is precisely because of the existence of “integration material†that some of the materials accumulated at “A†and “B†will fall into the subsequent metered materials from time to time, thus producing a packaging dose. Unstable.
3 Tea bag machine cutting metering system transformation plan and technical points The improved material cutting metering structure is shown in Figure 2.
(1) Add a stirring device (No. 7) to the hopper (No. 6) to improve the fluidity of the material.
Figure 2 is a schematic view of the structure of the improved blanking metering device
(3). Increase the scratch and cushioning device (Nos. 16 and 17 in Fig. 2) to solve the surface sticking problem of the metering rotor (No. 11).
(4). Improve the specific structure of the design blanking channel, as shown in Figure 2, the addition of the material sleeve (No. 5), to prevent the material from accumulating at the "A" and "B" positions in Figure 1 during the blanking process. Phenomenon (the upper end surface of the receiving sleeve is tangent to the lower circumferential surface of the metering rotor); increase the tightening screw (No. 18) to prevent the adapter sleeve (No. 10) from moving during the operation of the device.
Ensure the accuracy of the metering of the equipment; add the vibration pin (No. 14) and other parts on the lower nozzle (No. 1) to prompt the movable hopper (No. 13) and the vibrating material sleeve (No. 2) to make a quick up and down in the working process of the metering and packaging system. Reciprocating vibration, its working principle is: the up and down reciprocating motion of the shutter (No. 15) pushes the vibration pin to drive the movable hopper and the vibrating sleeve to make a fast up and down reciprocating vibration. Due to the vibration of the movable hopper and the vibrating sleeve, the flow of the material in the entire blanking passage can be promoted, and the occurrence of "stickiness" on the surface of the parts such as the lower nozzle can be avoided or reduced.
(5). In order to facilitate the regular inspection and maintenance of the parts such as the movable hopper and the metering rotor in the blanking passage, a quick disassembly and installation device (shown in Fig. 3) is added to the structural design of the blanking passage. How to use: Turn the dust ring (No. 2) so that the semi-circular notch is directly supported (No. 1) to move the dust ring up and down. Remove the dust ring and conveniently view from the observation port shown in Figure 3.2. To the relevant situation, in order to achieve the purpose of convenient inspection during the work of the equipment.
Figure 3.1 Schematic diagram of the quick installation structure
Figure 3.2 Schematic diagram of the quick disassembly structure
5 Conclusion The transformation of the tea bag machine cutting system is based on the user's production conditions on the basis of the original work process and structure of the equipment, from the transformation cost and structural optimization aspects have been fully demonstrated. Through the research on the use condition of the equipment at the user and the characteristics of the materials to be packaged, after many times of bottoming test, the design intention of “closed†type feeding channel and vibration feeding, quick disassembly and installation was introduced in the formulation of the transformation plan. The transformation work has achieved the ultimate success of Zui. Among them, the feeding sleeve matched with the metering rotor and the movable hopper and vibrating nozzle which promote the blanking play a key role in the improved design.
The research on the "adaptive transformation of the measuring system of the bagged tea packaging machine" has been carried out to improve the stability and reliability of the materials with poor fluidity during the packaging measurement process such as filling, metering and blanking. The practical significance, it fully broadens the adaptability of the company's existing series of tea bagging machine cutting materials to different materials, to meet the needs of the market.
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