A shooting table structure for sheet material recycling

Abstract

This invention relates to the technical field of injection molding machines, and specifically discloses a sheet material recycling injection stage structure, including a pre-plasticizing mechanism, a filtering mechanism, and an injection mechanism connected in series. The pre-plasticizing mechanism directly melts the sheet material into a molten material and transports it outward. The filtering mechanism performs online filtration and impurity removal on the molten material and achieves pressure isolation from downstream via a connecting cylinder and a melt check valve. The injection mechanism includes a foaming barrel, a foaming screw, and an air needle connected to the foaming barrel. The foaming barrel receives the filtered molten material, and the air needle injects gas into the cavity to mix the gas with the molten material to form a foamed molten material. The foaming screw stirs and disperses the gas-containing molten material and completes the material storage and metering. Subsequently, it is injected into the mold cavity through a controllable foaming nozzle for foaming and molding. This method can achieve direct recycling and molding of sheet material without the need for a granulation process, while taking into account the continuity of filtration and the stability of the closed pressure boundary of the foaming section. It is suitable for the production of foamed products with a high recycling ratio.

Description

Technical Field

[0001] This invention relates to the technical field of injection molding machines, and specifically to a structure for a sheet material recycling injection unit. Background Technology

[0002] The traditional process for recycling and reusing plastics is usually as follows: collection → sorting and cleaning → crushing into flakes → (extrusion) mixing and plasticizing → cooling → granulation → drying → sending the recycled granules into an injection molding machine for remelting → injection molding. Among them, the granulation process (melt cooling and solidification → pelletizing → reheating and melting) is not only energy-intensive (the plastic is repeatedly heated-cooled-reheated, increasing the thermal history and degradation risk), but also involves additional equipment investment (extruder), plant space and logistics costs.

[0003] Especially for products such as pallets, logistics boxes, and waste containers, which have relatively lenient requirements for surface precision but are used in large quantities and have thick walls, this intermediate granulation process, which is necessary to adapt to standard injection molding machines, is increasingly regarded as an efficiency bottleneck in the circular economy chain. Summary of the Invention

[0004] This invention addresses the aforementioned problems and aims to provide a reflow table structure for sheet material recycling. This solves the technical problems in the prior art, such as high energy consumption and long process chains caused by the need for recycled sheet material to be granulated before entering the injection molding machine, insufficient filtration continuity in the two-stage granulation-free architecture, difficulty in stable integration of physical foaming, and the tendency of long series reflow tables to leak or be damaged due to thermal deformation / off-center loading.

[0005] To achieve the above objectives, the present invention provides a feeding platform structure for sheet material recycling, comprising: The pre-plasticizing unit is used to receive recycled flakes and melt them into a molten material; A filtration mechanism, connected in series downstream of the pre-plasticizing mechanism, is used to filter the molten material; An injection mechanism is connected in series downstream of the filtration mechanism via a one-way valve. The injection mechanism includes a foaming cylinder, a foaming screw disposed within the foaming cylinder, and an air needle communicating with the foaming cylinder. The foaming cylinder is used to receive the solvent, and the foaming screw is used to stir and transport the solvent. The air needle is communicating with the foaming cylinder and is configured to inject gas into the foaming cylinder to mix with the solvent to form a foamed solvent.

[0006] According to the above-described injection stage structure, the filtration mechanism includes a filter box, which has a first filtration channel and a second filtration channel located between its inlet and outlet. Each of the first filtration channel and the second filtration channel has at least one filter screen.

[0007] According to the above-described stage structure, the filtration mechanism further includes a filter sensor for detecting the pressure difference across the filter screen, and a first drive cylinder for switching between the first filter channel and the second filter channel. The first drive cylinder is electrically connected to the filter sensor.

[0008] According to the above-described injection stage structure, the feed inlet of the filter box is connected to the discharge outlet of the pre-plasticizing mechanism through a connecting cylinder, and the feed inlet of the foaming machine cylinder is connected to the discharge outlet of the filter box through a one-way valve. A molten pressure sensor is provided on one side of the one-way valve for detecting the pressure difference between the connecting cylinder and the one-way valve, and the molten pressure sensor is electrically connected to the pre-plasticizing mechanism.

[0009] The injection stage structure described above also includes a support mechanism, which includes a base, a first support unit for supporting the pre-plasticizing mechanism, and a second support unit for supporting the injection mechanism. The base is provided with a guide rail, and both the first support unit and the second support unit are slidably connected to the guide rail.

[0010] According to the above-described injection stage structure, the pre-plasticizing mechanism includes a pre-plasticizing cylinder, a pre-plasticizing base, a pre-plasticizing screw, and a pre-plasticizing power component. The pre-plasticizing cylinder and the pre-plasticizing power component are both installed on the top of the first support unit through the pre-plasticizing base. One end of the pre-plasticizing screw is connected to the pre-plasticizing power component, and the other end passes through the pre-plasticizing base and extends into the pre-plasticizing cylinder.

[0011] According to the above-described launching platform structure, the second support unit includes a support base, a support plate, and an adjusting bolt. The support base is slidably fixed on the guide rail, and the support plate is raised and lowered on the top of the support base via the adjusting bolt. The bottom of the foaming cylinder is placed on the support plate.

[0012] According to the above-described injection stage structure, the injection mechanism further includes an injection seat, a foaming back pressure seat, a connecting rod, and an electronic ruler. The injection seat is slidably disposed on the guide rail and connected to one end of the foaming cylinder. The foaming back pressure seat is slidably disposed on the guide rail and located on the side of the injection seat away from the foaming cylinder. The foaming back pressure seat is connected to the foaming screw. The injection seat is connected to the foaming back pressure seat through the connecting rod. The foaming machine cylinder has a foaming nozzle at one end away from the injection seat. The electronic ruler is located outside the foaming machine cylinder and is electrically connected to the foaming nozzle and the injection seat.

[0013] According to the above-described injection stage structure, the first support unit includes a pre-plasticized base frame, a fixed plate, an adjusting plate, and a tightening screw. The pre-plasticized base frame is slidably mounted on the guide rail and connected to the pre-plasticized seat. The fixed plate is fixed to the injection seat. One end of the adjusting plate is connected to the fixed plate, and the other end is adjustablely connected to the pre-plasticized base frame via the tightening screw.

[0014] The injection stage structure described above also includes a seat-in / seat-out mechanism, which includes a second drive cylinder fixed to the base, and the piston rod of the second drive cylinder is connected to the injection seat.

[0015] The present invention has the following beneficial effects: 1. The sheet material can be directly fed into the pre-plastic cylinder for melting. After being filtered by the filtration mechanism, it can enter the foaming machine cylinder for foaming and injection. This can skip the entire process of cooling-granulation-drying-remelting, which can reduce energy consumption and the risk of thermal degradation. It is suitable for sheet material recycling processes. 2. The one-way valve can restrict the backflow of gas or molten material in the foaming barrel to the filtration mechanism. When the foaming nozzle is closed, the foaming barrel cavity forms a closed and sealed area. The gas needle injects gas into the cavity, and the rotating foaming screw stirs the gas so that it can be evenly dispersed in the molten material, thereby meeting the environmental requirements for foaming, facilitating stable integration of foaming function, and improving injection molding efficiency. 3. Through the combination of dual filtration channels, differential pressure detection by the filter sensor, and automatic switching between the two filtration channels driven by the first drive cylinder, the dissolution flow can be uninterrupted during filter replacement, thus improving overall efficiency. 4. With the differential pressure warning of the pressure sensor on the one-way valve, the pre-plasticizing conveyor can be automatically slowed down or suspended when the filter screen is slightly blocked and the upstream material accumulation trend occurs, so as to fundamentally avoid the chain failure of filter blockage → upstream overflow / pre-plasticizing overload. 5. The height of the support plate can be adjusted using the adjusting bolts, thereby adjusting the concentricity of the foaming nozzle and the mold cavity. The fine adjustment of the pre-plastic base frame can absorb the off-center load caused by the thermal deformation of the pre-plastic cylinder. At the same time, the adjusting plate and the fixing plate can ensure that the injection seat and the pre-plastic base frame move synchronously, thereby ensuring that the pre-plastic mechanism, the filtering mechanism and the injection mechanism move synchronously, avoiding the off-center load on the intermediate connecting parts and improving the overall stability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the embodiment; Figure 2 This is a schematic diagram of the filter mechanism structure in an embodiment; Figure 3 This is a schematic diagram of the injection mechanism structure in an embodiment; Figure 4 yes Figure 1 A magnified structural diagram at point A; Figure 5 yes Figure 1 A magnified diagram of part B; Figure 6 yes Figure 1 Another enlarged schematic diagram at point B.

[0017] In the picture: 100. Pre-plasticizing mechanism; 110. Pre-plasticized cylinder; 120. Pre-plasticizing base; 130. Pre-plasticizing screw; 140. Pre-plasticizing power component; 200, Filtering mechanism; 210, Filter box; 220, First filtration channel; 230, Second filtration channel; 240, Filter screen; 250, Filter sensor; 260, First drive cylinder; 270, Connecting cylinder; 280, One-way valve; 281, Fusion pressure sensor; 300. Injection mechanism; 310. Foaming cylinder; 311. Foaming nozzle; 320. Foaming screw; 330. Air needle; 340. Injection seat; 350. Foaming back pressure seat; 360. Connecting rod; 370. Electronic ruler; 400. Support mechanism; 410. Base; 411. Guide rail; 420. First support unit; 421. Pre-molded base frame; 422. Fixing plate; 423. Adjusting plate; 424. Tightening screw; 430. Second support unit; 431. Support seat; 432. Support plate; 433. Adjusting bolt; 500, Seat advance / retract mechanism; 510, Second drive cylinder. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the invention is not limited to these embodiments.

[0019] like Figure 1-6 As shown, in this embodiment, a sheet material recycling injection stage structure is provided, including a pre-plasticizing mechanism 100, a filtering mechanism 200, and an injection mechanism 300. The pre-plasticizing mechanism 100 is used to receive recycled sheet material and melt it into a molten material. The filtering mechanism 200 is connected in series downstream of the pre-plasticizing mechanism 100 and is used to filter the molten material to remove impurities. The injection mechanism 300 is connected in series downstream of the filtering mechanism 200 and is used to foam and inject the filtered molten material. This can save granulation, cooling, and remelting process steps, improve production efficiency, and reduce the need for equipment such as extruders, thereby reducing costs and space requirements.

[0020] Specifically, the injection mechanism 300 includes a foaming cylinder 310, a foaming screw 320 disposed within the foaming cylinder 310, and an air needle 330 communicating with the foaming cylinder 310. The injection mechanism 300 is connected in series downstream of the filtering mechanism 200 via a one-way valve 280. Since the foaming cylinder 310 is used to receive the solvent, the one-way valve 280 is also arranged between the foaming cylinder 310 and the filtering mechanism 200, allowing only gas and solvent from the filtering mechanism 200 to enter the foaming cylinder 310, and restricting the backflow of gas or solvent from the foaming cylinder 310 into the filtering mechanism 200. The foaming screw 320 is used for stirring and conveying the solvent, and the air needle 330 is connected to the foaming cylinder 310 and configured... To inject gas into the foaming barrel 310 to mix with the molten material and form a foaming solution, after the molten material enters the foaming barrel 310 through the filter mechanism 200 and the one-way valve 280, the foaming screw 320 can stir the molten material by rotating. During the stirring process, gas can be mixed into the molten material to form a foaming solution. During the foaming process, the one-way valve 280 can prevent gas and molten material from flowing back into the filter mechanism 200 to ensure the pressure inside the foaming barrel 310. After the molten material accumulates a preset amount and is fully stirred in the foaming barrel 310, the foaming screw 320 can drive the foaming solution to be injected along the axial direction of the foaming barrel 310, thereby injecting the foaming solution into the cavity of the mold.

[0021] In this embodiment, the foaming process belongs to the physical foaming / microfoaming category. It typically uses an inert gas (usually nitrogen or carbon dioxide) as the foaming agent. The gas is injected into the foaming barrel 310 under high pressure. The screw shears and mixes with the solvent, causing the spheres to fuse and form a uniform single-phase solution. Then, after injection into the mold cavity, a sudden pressure drop triggers nucleation, i.e., the bubbles grow. The final product cross-section exhibits a classic sandwich structure of a dense outer layer and a foamed core. The reason why traditional injection molding results in severe shrinkage in thick-walled areas and at the roots of reinforcing ribs is due to internal cooling and shrinkage. There are only two ways to compensate for insufficient melt in conventional methods: increase holding time / holding pressure (which will lead to increased internal stress and warpage) or add cold slug wells / larger gates (which will lead to longer cycles); however, the foaming method allows the formation of micropores in the ribs / thick-walled core, and the bubbles themselves bear the burden of compensating for shrinkage. Therefore, even if the ribs are made to be the same thickness as the wall, it is not easy to produce surface shrinkage marks. At the same time, the holding pressure section can be eliminated or reduced because the filling no longer depends on a very high final compaction pressure, but on the low-pressure uniform effect of bubble expansion. The required clamping force can be reduced to about 30%-70% of that of conventional processes.

[0022] In this embodiment, the foaming structure can be integrated onto the injection molding stage structure, further shortening the injection molding process time and reducing energy consumption.

[0023] Furthermore, the injection mechanism 300 also includes an injection seat 340, a foaming back pressure seat 350, a connecting rod 360, and an electronic ruler 370. The injection seat 340 is connected to one end of the foaming barrel 310. The foaming back pressure seat 350 is located on the side of the injection seat 340 away from the foaming barrel 310, and is connected to the foaming screw 320. The injection seat 340 is connected to the foaming back pressure seat 350 via the connecting rod 360, and the foaming back pressure seat 350 can be driven. The foaming screw 320 rotates, causing it to stir. The injection seat 340, via the connecting rod 360, can drive the foaming back pressure seat 350 to move towards or away from the foaming cylinder 310, thereby adjusting the pressure inside the foaming cylinder 310. A foaming nozzle 311 is located at the end of the foaming cylinder 310 away from the injection seat 340. The electronic ruler 370 is located outside the foaming cylinder 310 and is connected to the foaming nozzle 311 and the injection seat 340. 40 is an electrical signal connection used to detect the amount of melt in the foaming cylinder 310. In the initial stage, the melt filtered by the filter mechanism 200 enters the foaming cylinder 310 through the one-way valve 280. After the air needle 330 introduces gas into the foaming cylinder 310, the pressure inside the cylinder increases. When the foaming nozzle 311 is closed and the one-way valve 280 cannot backflow, it pushes the foaming back pressure seat 350 to move away from the foaming cylinder 310. 10 At this time, the material storage stage is in progress. When the molten material and gas in the foaming barrel 310 are fully stirred and the maximum volume is reached, the electronic ruler 370 senses and outputs a signal to control the foaming nozzle 311 to open. The injection seat 340 is controlled to pull the foaming back pressure seat 350 through the connecting rod 360. The foaming back pressure seat 350 pushes the foaming screw 320 to move forward, injecting the molten material into the mold cavity. The molten material foams in the mold cavity, and the injection molding machine can complete one foaming injection process.

[0024] During the rotation of the foaming screw 320, the screw edge of its outer edge will transport the molten material forward, so that the molten material can accumulate at the front end of the foaming cylinder 310 to achieve molten material storage.

[0025] In this embodiment, the injection stage structure also includes a support mechanism 400, which includes a base 410, a first support unit 420 for supporting the pre-plasticizing mechanism 100, and a second support unit 430 for supporting the injection mechanism 300. The base 410 is provided with a guide rail 411. Both the first support unit 420 and the second support unit 430 can be slidably connected to the guide rail 411. That is, both the pre-plasticizing mechanism 100 and the injection mechanism 300 can be adjusted in position by sliding contact with the guide rail 411. The filtering mechanism 200 is located between the pre-plasticizing mechanism 100 and the injection mechanism 300 and can move synchronously with both. Of course, in this embodiment, the arrangement direction of the guide rail 411 is consistent with the arrangement direction of the foaming cylinder 310.

[0026] In this embodiment, the foaming nozzle 311 of the foaming barrel 310 can extend into the pouring port of the mold. The pouring port is connected to the cavity of the mold. When the foaming barrel 310 needs to be cleaned or the foaming nozzle 311 needs to be replaced due to blockage, the entire foaming barrel 310 needs to be pushed backward so that the foaming nozzle 311 is disengaged from the pouring port. Therefore, the injection stage structure also includes a seat advance and retraction mechanism 500. The seat advance and retraction mechanism 500 includes a second drive cylinder 510 and slidably sets the injection seat 340 on the guide rail 411. The foaming back pressure seat 350 is also slidably set on the guide rail 411. The piston rod of the second drive cylinder 510 is connected to the injection seat 340, so the foaming barrel 310 and the filter mechanism 200 can be driven to move backward through the injection seat 340.

[0027] Specifically, the pre-plasticizing mechanism 100 includes a pre-plasticizing cylinder 110, a pre-plasticizing seat 120, a pre-plasticizing screw 130, and a pre-plasticizing power component 140. The pre-plasticizing cylinder 110 receives and melts the sheet material. A feeding seat is provided on the pre-plasticizing cylinder 110, through which the sheet material falls into the pre-plasticizing cylinder 110. In this embodiment, it is particularly noteworthy that heating coils are provided on both the pre-plasticizing cylinder 110 and the foaming machine cylinder 310. These heating coils generate heat to melt the sheet material, preventing the molten material from solidifying. The pre-plasticizing seat 120 is used to position the pre-plasticizing cylinder 110 and the pre-plasticizing power component 140. The pre-plastic cylinder 110 and the pre-plasticizing power component 140 are both installed on the top of the first support unit 420 through the pre-plasticizing seat 120. When the first support unit 420 is displaced, it can also drive the pre-plasticizing seat 120, the pre-plasticizing cylinder 110 and the pre-plasticizing power component 140 to move synchronously. One end of the pre-plasticizing screw 130 is connected to the pre-plasticizing power component 140, and the other end passes through the pre-plasticizing seat 120 and extends into the pre-plasticizing cylinder 110. The pre-plasticizing power component 140 can drive the pre-plasticizing screw 130 to rotate to generate shear heat and assist melting, so as to realize the pre-plasticizing action of the sheet material.

[0028] Furthermore, the first support unit 420 includes a pre-plasticizing base frame 421, a fixing plate 422, an adjusting plate 423, and a tightening screw 424. The pre-plasticizing base frame 421 is slidably mounted on the guide rail 411 and is connected to the bottom of the pre-plasticizing seat 120. The fixing plate 422 is fixed to the injection seat 340. One end of the adjusting plate 423 is connected to the fixing plate 422, and the other end is adjustablely connected to the pre-plasticizing base frame 421 via the tightening screw 424. When the second drive cylinder 510 is activated, if the displacements of the pre-plasticizing mechanism 100 and the injection mechanism 300 are not synchronized, it will cause the connecting parts between the filter mechanism 200 and the pre-plasticizing mechanism 100 or the injection mechanism 300 to be subjected to an off-center load. Therefore, the adjusting plate 423 can be used to adjust the connection between the injection seat 340 and the pre-plasticizing mechanism 120. The pre-plastic base frame 421 is connected together, so that when the injection seat 340 is subjected to the force of the second drive cylinder 510, the pre-plastic base frame 421 is displaced synchronously, thereby ensuring that the connecting parts on the upper and lower sides of the filter mechanism 200 move synchronously and avoid being subjected to radial off-center load. At the same time, since one end of the adjusting plate 423 is adjustablely connected to the pre-plastic base frame 421 through the tightening screw 424, when the working temperature of the pre-plastic barrel is high, once it generates axial thermal expansion, the tightening screw 424 can be used to make a fine adjustment between the adjusting plate 423 and the pre-plastic base frame 421. Thus, the deformation caused by thermal expansion is absorbed by the fine adjustment of the position of the pre-plastic base frame 421, which can also prevent the connecting parts between the filter mechanism 200 and the pre-plastic mechanism 100 from bearing excessive off-center load.

[0029] Furthermore, the second support unit 430 includes a support base 431, a support plate 432, and an adjusting bolt 433. The support base 431 is slidably fixed on the guide rail 411. The support plate 432 is raised and lowered on the top of the support base 431 by adjusting the bolt 433. The bottom of the foaming cylinder 310 is placed on the support plate 432. The foaming cylinder 310 is fixedly connected to the support plate 432. The end of the foaming cylinder 310 away from the foaming nozzle 311 will be affected by its own weight, the downward pressure of the pre-plasticizing mechanism 100 and the filtering mechanism 200, and its end will droop. The drooping will cause the foaming nozzle 311 to be misaligned with the mold cavity. At this time, the height of the support plate 432 can be adjusted by adjusting the bolt 433, thereby adjusting the concentricity of the foaming nozzle 311 and the mold cavity.

[0030] Specifically, the filtration mechanism 200 includes a filter box 210. The filter box 210 has a first filtration channel 220 and a second filtration channel 230 located between its inlet and outlet. Each of the first filtration channel 220 and the second filtration channel 230 has at least one filter screen 240. The inlet of the filter box 210 is connected to the outlet of the pre-plasticizing mechanism 100 through a connecting cylinder 270. The inlet of the foaming cylinder 310 is connected to the outlet of the filter box 210 through a one-way valve 280. The inlet and outlet of the filter box 210 can be connected. Of course, in this embodiment, both the first filtration channel 220 and the second filtration channel 230 are movable. When the first filtration channel 220 is moved to the outside of the filter box 210, the inlet and outlet of the filter box 210 cannot be connected through the first filtration channel 220, and the same applies to the second filtration channel 230.

[0031] Furthermore, the filtration mechanism 200 also includes a filter sensor 250 for detecting the pressure difference across the filter screen 240, and a first drive cylinder 260 for switching between the first filter channel 220 and the second filter channel 230. The first drive cylinder 260 is electrically connected to the filter sensor 250. When the filter screen 240 is severely clogged, the pressure difference across the filter screen 240 will continue to increase. When it reaches a set threshold, the filter sensor 250 outputs a signal to control the first drive cylinder 260 to work, push out the corresponding filter channel, and replace the filter screen 240. During the replacement process, since the other filter channel is still working normally, it will not affect the filtration process. That is, the filter screen 240 can be replaced without stopping the machine, thus improving the overall efficiency.

[0032] Furthermore, a pressure sensor 281 is provided on one side of the one-way valve 280 to detect the pressure difference between the connecting cylinder 270 and the one-way valve 280. The pressure sensor 281 is electrically connected to the pre-plasticizing mechanism 100. When the filter screen 240 is slightly clogged, the reduced filtration speed can easily cause material to accumulate in the connecting cylinder 270. At this time, when the pressure sensor 281 detects the pressure difference between the connecting cylinder 270 and the one-way valve 280, it can output a signal to control the pre-plasticizing mechanism 100 to reduce the conveying speed or stop the conveying to prevent overflow.

[0033] In this embodiment, the injection process of the injection stage structure includes the following steps: 1. Sheet pre-plasticizing feeding: The recycled sheet material is fed into the pre-plasticizing cylinder 110 through the feeding seat. The pre-plasticizing screw 130 rotates and, in conjunction with the heating of the pre-plasticizing cylinder 110, shears and melts the recycled sheet material into a molten material and conveys it forward. 2. Filtration and One-Way Isolation: The molten material enters the filter box 210 through the connecting cylinder 270, and after passing through the filter screen 240 at the working position to intercept impurities, it flows into the foaming machine cylinder 310 cavity through the one-way valve 280. During this process, when a slight blockage causes the upstream pressure to rise, the melt pressure sensor 281 can issue a warning to the pre-plasticizing mechanism 100 to slow down / pause to prevent material accumulation. The filter sensor 250 continuously / periodically detects the pressure difference on both sides of the filter screen 240. When the pressure difference reaches the set threshold, the first drive cylinder 260 drives the dual filter channel to switch and complete the screen replacement without stopping the machine. 3. Material Storage: The foaming nozzle 311 remains closed, the one-way valve 280 prevents backflow, and the cavity of the foaming barrel 310 forms a sealed area with both ends closed; the air needle 330 injects nitrogen into the cavity, and the foaming screw 320 rotates and stirs to make the nitrogen evenly dispersed in the molten material; the continuous flow of molten material increases the pressure in the cavity, and the accumulation of molten material pushes the foaming back pressure seat 350 and the foaming screw 320 backward. After the electronic ruler 370 detects that the displacement has reached the set value, it outputs a signal, and the pre-plasticizing mechanism 100 stops the pre-plasticizing action; 4. Injection foaming: The foaming nozzle 311 is opened, the injection seat 340 pushes the foaming back pressure seat 350 through the connecting rod 360, and the foaming screw 320 moves forward to inject the gas-containing molten material into the mold cavity. The molten material expands and solidifies in the mold cavity to form a mold. 5. Cycle Start-up: After injection is completed and the mold is opened and the part is removed, the electronic ruler 370 returns to zero / position signal, triggering the pre-plasticizing mechanism 100 to restart and enter the next cycle.

[0034] The technical solution of the present invention has been described in detail above with reference to the accompanying drawings. The described embodiments are used to help understand the concept of the present invention. The specific embodiments described herein are merely illustrative examples of the spirit of the present invention. Those skilled in the art to which this invention pertains can make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0036] Furthermore, in this invention, descriptions involving terms such as "first," "second," and "a" are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

Claims

1. A firing platform structure for sheet material recycling, characterized in that, include: The pre-plasticizing unit is used to receive recycled flakes and melt them into a molten material; A filtration mechanism, connected in series downstream of the pre-plasticizing mechanism, is used to filter the molten material; An injection mechanism is connected in series downstream of the filtration mechanism via a one-way valve. The injection mechanism includes a foaming cylinder, a foaming screw disposed within the foaming cylinder, and an air needle communicating with the foaming cylinder. The foaming cylinder is used to receive the solvent, the foaming screw is used to stir and transport the solvent, and the air needle is communicated with the foaming cylinder and configured to inject gas into the foaming cylinder to mix with the solvent to form a foamed solvent.

2. The launching platform structure according to claim 1, characterized in that, The filtration mechanism includes a filter box, which has a first filtration channel and a second filtration channel located between its inlet and outlet. Each of the first filtration channel and the second filtration channel has at least one filter screen.

3. The launching platform structure according to claim 2, characterized in that, The filtration mechanism further includes a filter sensor for detecting the pressure difference across the filter screen, and a first drive cylinder for switching between the first filter channel and the second filter channel. The first drive cylinder is electrically connected to the filter sensor.

4. The firing platform structure according to claim 2, characterized in that, The feed inlet of the filter box is connected to the discharge outlet of the pre-plasticizing mechanism through a connecting cylinder. The feed inlet of the foaming machine cylinder is connected to the discharge outlet of the filter box through a one-way valve. A pressure sensor is provided on one side of the one-way valve for detecting the pressure difference between the connecting cylinder and the one-way valve. The pressure sensor is electrically connected to the pre-plasticizing mechanism.

5. The firing platform structure according to claim 1, characterized in that, It also includes a support mechanism, which includes a base, a first support unit for supporting the pre-plasticizing mechanism, and a second support unit for supporting the injection mechanism. The base is provided with a guide rail, and both the first support unit and the second support unit are slidably connected to the guide rail.

6. The firing platform structure according to claim 5, characterized in that, The pre-plasticizing mechanism includes a pre-plasticizing cylinder, a pre-plasticizing base, a pre-plasticizing screw, and a pre-plasticizing power component. The pre-plasticizing cylinder and the pre-plasticizing power component are both installed on the top of the first support unit through the pre-plasticizing base. One end of the pre-plasticizing screw is connected to the pre-plasticizing power component, and the other end passes through the pre-plasticizing base and extends into the pre-plasticizing cylinder.

7. The firing platform structure according to claim 5, characterized in that, The second support unit includes a support base, a support plate, and an adjusting bolt. The support base is slidably fixed on the guide rail. The support plate is raised and lowered on the top of the support base via the adjusting bolt. The bottom of the foaming cylinder is placed on the support plate.

8. The firing platform structure according to claim 6, characterized in that, The injection mechanism further includes an injection seat, a foaming back pressure seat, a connecting rod, and an electronic ruler. The injection seat is slidably mounted on the guide rail and connected to one end of the foaming cylinder. The foaming back pressure seat is slidably mounted on the guide rail and located on the side of the injection seat away from the foaming cylinder. The foaming back pressure seat is connected to the foaming screw. The injection seat is connected to the foaming back pressure seat through the connecting rod. The foaming machine cylinder has a foaming nozzle at one end away from the injection seat. The electronic ruler is located outside the foaming machine cylinder and is electrically connected to the foaming nozzle and the injection seat.

9. The firing platform structure according to claim 8, characterized in that, The first support unit includes a pre-plasticized base frame, a fixed plate, an adjusting plate, and a tightening screw. The pre-plasticized base frame is slidably mounted on the guide rail and connected to the pre-plasticized seat. The fixed plate is fixed to the injection seat. One end of the adjusting plate is connected to the fixed plate, and the other end is adjustablely connected to the pre-plasticized base frame via the tightening screw.

10. The launch platform structure according to claim 8, characterized in that, It also includes a seat-in and seat-out mechanism, which includes a second drive cylinder fixed on the base, and the piston rod of the second drive cylinder is connected to the injection seat.

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