Quantitative extrusion device
By designing a quantitative extrusion device, the rotary feeding screw and mobile vacuum piston are used to solve the problem of precise measurement of raw materials of high-viscosity foamed materials, and the rapid and precise quantitative extrusion of raw materials is achieved, which improves production efficiency and reduces production costs.
Patent Information
- Application Number
- CN202420856603.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-23
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-04-23
AI Technical Summary
When producing high-viscosity foamed materials, it is difficult to accurately measure raw materials. The existing batch weighing methods are prone to errors and take a long time, making it difficult to meet the needs of large-scale production.
A quantitative extrusion device is designed, including a feeding mechanism and a feeding mechanism, and the precise quantitative extrusion of raw materials is achieved by rotating the feeding screw and moving the vacuum piston.
The rapid and precise quantitative extrusion of raw materials is achieved, which avoids raw materials clogging and adhesion, improves production efficiency and reduces production costs.
Smart Images
Figure CN222681718U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of product packaging, in particular to a quantitative extrusion device. Background Art
[0002] A foaming material used in the production of non-food contact products such as coffee cup holders and ice cream lids. It is made of pulp, starch, foaming agent and some other additives. The foaming material is a high-viscosity solid with properties similar to dough. The amount used during production needs to be accurately measured to ensure the quality and performance of the product produced. For high viscosity, it is difficult to weigh it all at once. Therefore, the batch weighing method is generally adopted to divide the solid into smaller parts, weigh them separately, and then combine these parts together to achieve the required total amount, but this is prone to errors and the weighing time is too long, which is difficult to meet the needs of large-scale production. Utility Model Content
[0003] Based on this, in order to solve the above technical problems, the utility model provides a quantitative extrusion device.
[0004] The purpose of the utility model can be achieved through the following technical solutions:
[0005] A quantitative extrusion device comprises a feeding mechanism and a material containing mechanism spaced in front of the feeding mechanism;
[0006] The feeding mechanism comprises a feeding cavity and a feeding screw arranged in the feeding cavity and capable of rotating. The feeding cavity has a feeding port at the top and a discharging port at the front, and a gate capable of opening or closing the discharging port is arranged inside the discharging port.
[0007] The material holding mechanism includes a shell and a shell cylinder that drives the shell to move toward the material feeding chamber. The shell has a quantitative chamber in it. The quantitative chamber is provided with a vacuum breaking piston that can slide back and forth, and the air blowing port of the vacuum breaking piston faces the material feeding chamber. A discharge cylinder that drives the vacuum breaking piston to move backward is also fixed on the angle plate in front of the shell, as well as a limit block and an in-position sensor installed on the angle plate to limit the forward movement of the vacuum breaking piston.
[0008] With the above technical solution, during operation, the shell cylinder drives the shell to be inserted into the discharge port of the feeding chamber, and the gate rises, so that the discharge port of the feeding chamber is connected to the quantitative chamber of the shell. After that, the feeding screw rotates, pushing the raw materials in the feeding chamber forward, injecting them into the quantitative chamber of the shell, and then pushing the vacuum breaking piston forward until the front end of the vacuum breaking piston hits the limit block and the in-place sensor, indicating that the quantitative chamber has been filled with a preset weight of raw materials. The structure is simple and easy to use. By adjusting the position of the limit block forward and backward, the forward stroke of the vacuum breaking piston can be controlled, thereby controlling the extrusion of raw materials of different weights. During the extrusion process, the vacuum breaking piston is driven to move backward by the discharge cylinder to push out the raw materials in the quantitative chamber, and at the same time, air is blown through the vacuum breaking piston to avoid clogging and adhesion of the raw materials, thereby improving production efficiency and reducing production costs.
[0009] As a further solution of the utility model: a pair of slide rails are provided below the shell, a slide seat is fixed on the output end of the shell cylinder, the shell is fixed on the slide seat, and the slide seat is assembled on the slide rails.
[0010] As a further scheme of the utility model: the vacuum breaking piston includes an outer shell, the outer shell is provided with a rear air nozzle and a front air nozzle on its circumference, the outer shell is provided with a sliding cavity, the front port of the sliding cavity is equipped with an end cover, a valve core is provided in the sliding cavity, the valve core includes a front part, a middle part and a rear part, a copper sleeve is fixed in the front port of the sliding cavity, the front part of the valve core extends forward into the copper sleeve, and the rear part is located in the rear port of the sliding cavity, wherein the rear end of the middle part of the valve core has a notch forming a rear air cavity between the sliding cavity, the front end of the middle part has a notch forming a front air cavity between the sliding cavity, a buffer area is formed between the valve core and the end cover, a rear air duct connecting the rear air nozzle with the rear air cavity and a front air duct connecting the front air nozzle with the front air cavity are provided in the valve core.
[0011] As a further solution of the utility model: a sealing ring is provided between the valve core and the housing.
[0012] As a further solution of the utility model: a conical plug is provided on the rear end face of the housing, the plug has a socket communicating with the quantitative cavity, a positioning plate is provided at the outlet of the feeding cavity in front of the gate, the positioning plate has a socket matching the plug. The above technical solution can be used for fast and accurate positioning.
[0013] As a further solution of the utility model: the number of the feeding screws is two, and the number and position of the sockets, plugs, quantitative chambers, vacuum breaking pistons and discharge cylinders correspond one to one with the feeding screws.
[0014] In summary, the utility model limits the forward movement of the vacuum breaking piston by adjusting the position of the limit block, thereby controlling the extrusion of raw materials of different weights. During the extrusion process, the vacuum breaking piston is driven to move backward by the discharge cylinder to push out the raw materials in the quantitative cavity, and at the same time, the vacuum breaking piston is blown to avoid blockage and adhesion of the raw materials, thereby improving production efficiency and reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The utility model is further described below in conjunction with the accompanying drawings.
[0016] Figure 1 It is a structural schematic diagram of a quantitative extrusion device of the utility model;
[0017] Figure 2 yes Figure 1 Sectional view at AA;
[0018] Figure 3 yes Figure 1 The enlarged view of point B in the middle;
[0019] Figure 4 yes Figure 2 Enlarged view of point C in the middle;
[0020] Figure 5 It shows that the raw material moves forward and is injected into the quantitative chamber, thereby pushing the vacuum breaking piston in the quantitative chamber to move forward;
[0021] Figure 6 It shows that the vacuum breaking piston moves backwards to push the raw material in the metering chamber out;
[0022] Figure 7 This is a schematic diagram of the structure of the vacuum breaking piston of the utility model;
[0023] Figure 8 yes Figure 7 Sectional view at DD in the middle;
[0024] Fig. 9 The figure shows the ventilation of the backward air nozzle. After the air flow is blown out from the air outlet of the backward airway, the valve core is driven to move toward the buffer area.
[0025] Fig.10 yes Fig. 9 Enlarged view of point E in the middle. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] See also Figure 1 and Figure 2 As shown, the utility model is a quantitative extrusion device, comprising a feeding mechanism 10 and a material containing mechanism 20 spaced apart in front of the feeding mechanism 10 .
[0028] like Figure 1 and Figure 2 As shown, the feeding mechanism 10 includes a feeding chamber 11 and a feeding screw 12 arranged in the feeding chamber 11. The feeding chamber 11 has a feeding port 111 at the top and a discharging port at the front. A motor 13 is arranged outside the feeding chamber 11, and a rotating shaft of the motor 13 is connected to the rear end of the feeding screw 12 to drive the feeding screw 12 to rotate. A gate 14 capable of opening or closing the discharging port is arranged inside the discharging port of the feeding chamber 11. A gate lifting cylinder 15 for driving the gate 14 to rise and fall is fixed outside the feeding chamber 11. In this way, the gate 14 is driven to rise and fall by the gate lifting cylinder 15 to control the opening or closing of the discharging port.
[0029] like Figure 1 and Figure 2 As shown, the material holding mechanism 20 includes a housing 21 and a housing cylinder 22 that drives the housing 21 to move toward the material delivery chamber 11. A pair of slide rails 31 are provided below the housing 21. A slide seat 32 is fixed to the output end of the housing cylinder 22. The housing 21 is fixed to the slide seat 32 through an angle plate 24. The slide seat 32 is assembled on the slide rail 31.
[0030] Combination Figure 3 and Figure 4 As shown, a quantitative chamber 211 is provided in the housing 21. A vacuum-breaking piston 23 that can move forward and backward is provided in the quantitative chamber 211. There is a clearance fit between the quantitative chamber 211 and the vacuum-breaking piston 23, and the clearance value is 0.02-0.04mm. A discharge cylinder 25 that drives the vacuum-breaking piston 23 to move backward is fixed on the angle plate 24 in front of the vacuum-breaking piston 23.
[0031] like Figure 3 As shown, a limit block 26 and an in-place sensor 27 are also fixed on the angle plate 24. The limit block 26 is used to limit the vacuum breaking piston 23 from moving slightly forward due to inertia after it is in place, thereby causing the raw material injected into the quantitative cavity 211 to exceed the preset weight.
[0032] Combination Figure 5 and Figure 6 As shown, during operation, the housing cylinder 22 drives the housing 21 to insert into the discharge port of the feeding chamber 11, and then the gate lifting cylinder 15 drives the gate 14 to rise, so that the discharge port of the feeding chamber 11 is connected to the quantitative chamber 211 of the housing 21. After that, the motor 13 starts, drives the feeding screw 12 to rotate, pushes the raw material in the feeding chamber 11 to move forward, and injects it into the quantitative chamber 211 of the housing 21, thereby pushing the vacuum breaking piston 23 in the quantitative chamber 211 to move forward until the front end of the vacuum breaking piston 23 hits the limit block 26 and triggers the in-place sensor 27, which means that the quantitative chamber 211 has been filled with a preset weight of raw materials, and the in-place sensor 27 sends a signal to proceed to the next process. Here, the position of the limit block 26 can be adjusted in the front and rear directions to limit the distance that the vacuum breaking piston 23 moves forward, thereby controlling the extrusion of raw materials of different weights. Of course, the position of the in-place sensor 27 moves as the position of the limit block 26 moves.
[0033] Combination Figure 7 , Figure 8 and Fig. 9 As shown, the vacuum breaking piston 23 includes a shell 231, which has a sliding cavity 2311 inside. A valve core 232 is arranged in the sliding cavity 2311. The valve core 232 includes a front portion 2321, a middle portion 2322 and a rear portion 2323. Among them, the diameter of the rear portion 2323 is smaller than the diameter of the middle portion 2322. The rear portion 2323 of the valve core 232 is located in the rear port of the sliding cavity 2311. The rear end face of the valve core 232 is flush with the rear end face of the sliding cavity 2311. A copper sleeve 234 is fixed in the front port of the sliding cavity 2311. The front portion 2321 of the valve core 232 extends forward into the copper sleeve 234. An end cover 239 is mounted at the front port of the sliding cavity 2311. In addition, a front air nozzle 237 and a rear air nozzle 238 are installed at the front end of the shell 231. The rear end of the middle part 2322 of the valve core 232 has a notch and a rear air cavity 235 is formed between the notch and the sliding cavity 2311, and the front end of the middle part 2322 has a notch and a front air cavity 236 is formed between the sliding cavity 2311. There is a gap between the valve core 232 and the end cover 239 to form a buffer area 230. The valve core 232 is provided with a rearward air passage 2325 connecting the rearward air nozzle 238 with the rearward air cavity 235, and a front air passage 2326 connecting the front air nozzle 237 with the front air cavity 236.
[0034] like Figure 8 and Fig. 9As shown, in addition, holes 2341 are provided at the upper and lower sides of the copper sleeve 234 at positions corresponding to the front air nozzle 237 and the rear air nozzle 238. Avoidance openings 2324 are provided at positions corresponding to the holes 2341 on the valve core 232. The front air nozzle 237 and the rear air nozzle 238 are inserted into the corresponding avoidance openings 2324 through the corresponding holes 2341. In this way, the avoidance openings 2324 can allow the valve core 232 to move forward and backward in the sliding cavity 2311.
[0035] A sealing ring 233 is provided between the valve core 232 and the housing 231 .
[0036] like Figure 8 and Fig. 9 As shown, during operation, the back-retracting air nozzle 238 is ventilated, and the air flow is blown out from the air outlet of the back-retracting air channel 2325 to the back air cavity 235, thereby driving the valve core 232 to move toward the buffer area 230, and the movement amount is 1mm. At the same time, there is a gap 2327 between the rear portion 233 of the valve core 232 and the rear port of the sliding cavity 2311, and the gap value is 0.02-0.04mm. Fig.10 As shown, a small amount of airflow can be ejected from the rear air cavity 235 through the gap 2327 between the rear portion 233 of the valve core 232 and the rear port of the sliding cavity to blow away the raw material, thereby preventing the raw material from adhering to the vacuum breaking piston 23. When the raw material is taken away, the rear air nozzle 238 is cut off, and the front air nozzle 237 is ventilated, and the airflow is blown out from the air outlet of the front air channel 2326 and blown to the front air cavity 236, thereby driving the valve core 232 to reset.
[0037] like Figure 2 and Figure 4 As shown, in addition, a conical plug 212 is provided on the rear end face of the housing 21. The plug 212 has a socket 213 in communication with the quantitative chamber 211. A positioning plate 16 is provided in front of the gate at the discharge port of the feeding chamber 11. The positioning plate 16 has a socket 17 adapted to the plug 212.
[0038] like Figure 1 and Figure 2 As shown, in this embodiment, there are two feeding screws 12. The number and position of the socket 17, the plug 212, the quantitative cavity 211, the vacuum breaking piston 23 and the discharge cylinder 25 correspond to the feeding screws 12 one by one.
[0039] During operation, the shell cylinder 22 starts, drives the shell 21 to move toward the feeding chamber 11, and the plug 212 of the shell 21 is inserted into the corresponding socket 17. Subsequently, the gate lifting cylinder 15 drives the gate 14 to rise, so that the discharge port of the feeding chamber 11 is connected with the quantitative chamber 211 of the shell 21. After that, the motor 13 starts, drives the feeding screw 12 to rotate, pushes the raw material in the feeding chamber 11 to move forward, and injects it into the quantitative chamber 211 of the shell 21, thereby pushing the vacuum breaking piston 23 to move forward until the end cover 239 of the vacuum breaking piston 23 hits the limit block 26 and the in-place sensor 27, and the in-place sensor 27 sends a signal.
[0040] Subsequently, the motor 13 stops, the feeding screw 12 stops rotating, the gate lifting cylinder 15 drives the gate 14 to descend, and closes the discharge port. At the same time, the housing cylinder 22 drives the housing 21 to move away from the feeding chamber 11, and the plug 212 is separated from the socket 17. After that, the discharge cylinder 25 drives the vacuum breaking piston 23 to move backward, thereby gradually pushing the raw material out of the quantitative chamber 211. At the same time, during the backward movement of the vacuum breaking piston 23, the backward air nozzle 238 is ventilated, driving the valve core 232 to move toward the buffer area 230, and at the same time, a small amount of air flow is ejected from the rear air chamber 235 through the gap between the rear part 2323 of the valve core 232 and the rear port of the sliding chamber 2311, thereby preventing the raw material from adhering to the vacuum breaking piston 23. Subsequently, after the raw material is taken away, the rear air nozzle 238 is cut off and the front air nozzle 237 is ventilated. The air flow is blown out from the air outlet of the front air duct 2326 and blown to the front air cavity 236, driving the valve core 232 to reset.
[0041] In summary, the utility model adjusts the position of the limit block to limit the forward travel of the vacuum breaking piston, thereby controlling the extrusion of raw materials of different weights. During the extrusion process, the vacuum breaking piston is driven to move backward by the discharge cylinder to push out the raw materials in the quantitative cavity, and at the same time, the vacuum breaking piston is blown to avoid clogging and adhesion of the raw materials, thereby improving production efficiency and reducing production costs.
[0042] The above is a detailed description of an embodiment of the utility model, but the content is only a preferred embodiment of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of application of the utility model should still fall within the scope of the patent coverage of the utility model.
Claims
1. A quantitative extrusion device, comprising a feeding mechanism and a material holding mechanism spaced in front of the feeding mechanism; characterized in that: The feeding mechanism comprises a feeding cavity and a feeding screw arranged in the feeding cavity and capable of rotating. The feeding cavity has a feeding port at the top and a discharging port at the front, and a gate capable of opening or closing the discharging port is arranged inside the discharging port. The material holding mechanism includes a shell and a shell cylinder that drives the shell to move toward the material feeding chamber. The shell has a quantitative chamber in it. The quantitative chamber is provided with a vacuum breaking piston that can slide back and forth, and the air blowing port of the vacuum breaking piston faces the material feeding chamber. A discharge cylinder that drives the vacuum breaking piston to move backward is also fixed on the angle plate in front of the shell, as well as a limit block and an in-position sensor installed on the angle plate to limit the forward movement of the vacuum breaking piston.
2. The quantitative extrusion device according to claim 1, characterized in that: A pair of slide rails are arranged below the shell, a slide seat is fixed on the output end of the shell cylinder, the shell is fixed on the slide seat, and the slide seat is assembled on the slide rails.
3. The quantitative extrusion device according to claim 1, characterized in that: The vacuum breaking piston includes an outer shell, which is provided with a rear air nozzle and a front air nozzle on its circumference, a sliding cavity is provided in the outer shell, the front port of the sliding cavity is equipped with an end cover, a valve core is provided in the sliding cavity, and the valve core includes a front part, a middle part and a rear part, a copper sleeve is fixed in the front port of the sliding cavity, the front part of the valve core extends forward into the copper sleeve, and the rear part is located in the rear port of the sliding cavity, wherein the rear end of the middle part of the valve core has a notch forming a rear air cavity between the sliding cavity, the front end of the middle part has a notch forming a front air cavity between the sliding cavity, a buffer area is formed between the valve core and the end cover, a rear air passage connecting the rear air nozzle with the rear air cavity and a front air passage connecting the front air nozzle with the front air cavity are provided in the valve core.
4. The quantitative extrusion device according to claim 3, characterized in that: A sealing ring is arranged between the valve core and the shell.
5. The quantitative extrusion device according to claim 3, characterized in that: The upper and lower sides of the copper sleeve are provided with holes at positions corresponding to the front air inlet and the rear air outlet, and the positions corresponding to the holes on the valve core are provided with avoidance openings.
6. The quantitative extrusion device according to claim 1, characterized in that: A conical plug is arranged on the rear end face of the shell, and a socket connected to the quantitative cavity is arranged in the plug. A positioning plate is arranged in front of the gate at the discharge port of the feeding cavity, and a socket matched with the plug is arranged on the positioning plate.
7. The quantitative extrusion device according to claim 6, characterized in that: There are two feeding screws, and the number and position of the socket, the plug, the quantitative cavity, the vacuum breaking piston and the discharge cylinder correspond to the feeding screws one by one.