Double-cavity linkage crushing device and method for polyester raw materials for sound-absorbing cotton

Abstract

The invention discloses a double-cavity linkage crushing device and method for a polyester raw material for sound-absorbing cotton, and relates to the technical field of sound-absorbing cotton production. The crushing device is provided with a feeding bin, a crushing bin and a material collector, two groups of crushing blades are arranged in a crushing cavity in the crushing bin, and the crushing cavity comprises a cross crushing area and an airflow cleaning area. An inner partition plate is arranged in the feeding bin and provided with a heating slope face and an alloy partition net, a pressing cylinder driven by a telescopic mechanism is arranged above the inner partition plate, and a vibration cylinder is connected below the inner partition plate. The crushing cavity is provided with two sensing probes, an air knife piece used for cleaning crushing blades is installed at the bottom of the feeding bin, a discharging channel is arranged at the bottom of the crushing bin, and an inclined filter screen and a secondary material collecting channel are arranged in the discharging channel. The crushing uniformity is improved through raw material pretreatment, crushing and cleaning are synchronously carried out through double-cavity linkage, the utilization rate of the raw materials is improved in combination with secondary screening, intelligent control is achieved by means of a sensing probe, and the crushing efficiency and precision of the sound-absorbing cotton polyester raw materials are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of sound-absorbing cotton production technology, and in particular to a dual-cavity linkage crushing device and method for polyester raw materials used in sound-absorbing cotton. Background Technology

[0002] In the production of sound-absorbing cotton, the crushing precision, efficiency, and utilization rate of polyester raw materials directly affect the sound absorption performance and production efficiency of the product. However, traditional polyester raw material crushing devices for sound-absorbing cotton have many technical bottlenecks.

[0003] Traditional equipment lacks a raw material pretreatment stage, allowing large pieces of raw material to directly enter the crushing chamber. This not only significantly increases the load on the crushing blades and accelerates blade wear, but also easily leads to uneven crushing and low particle size compliance rates, requiring repeated crushing and further reducing production efficiency. Simultaneously, the crushing and blade cleaning processes are independent, allowing raw material to easily remain on the blade surface during crushing. This accumulated material continuously reduces shearing precision, and long-term adherence to the residue can cause deterioration, directly affecting the purity of the final product and increasing the defect rate. Furthermore, these devices generally lack intelligent monitoring mechanisms, causing the equipment to remain idle even after the raw material delivery is complete, resulting in significant energy waste.

[0004] The combination of these problems results in insufficient production efficiency, unstable product quality, and serious energy waste in traditional equipment, making it difficult to meet the high precision and high efficiency requirements of large-scale production of sound-absorbing cotton. Overcoming these difficulties has become an urgent technical problem to be solved. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention provides a dual-chamber linkage crushing device for polyester raw materials used in sound-absorbing cotton. The crushing device is configured from top to bottom as a feeding bin, a crushing bin, and a collector. The crushing chamber inside the crushing bin is equipped with two sets of crushing blades. The feeding bin is equipped with an inner partition, a feeding trough on the inner partition, and a feeding trough below the inner partition. A heating ramp is provided on the upper side of the inner partition. An alloy dividing mesh is positioned at the center of the inner partition. A vibrating cylinder connected to the alloy dividing mesh and a first vibrator driving the vibrating cylinder are located on the bottom side of the inner partition. A telescopic mechanism is provided at the top of the feeding trough, with its output end pointing downwards and driving a downward pressure cylinder vertically aligned with the alloy dividing mesh. The crushing chamber includes a cross-crushing zone and an airflow cleaning zone. The cross-crushing zone is located in the area where the two sets of crushing blades intersect and its bottom is vertically connected to the collector. The bottom opening of the vibrating cylinder faces the cross-crushing zone. The crushing chamber is equipped with a first sensing probe facing the top of the cross-crushing zone and a second sensing probe facing the bottom. The airflow cleaning zone is located between the crushing blades and the inner wall of the crushing chamber. The feeding trough is equipped with an air knife for cleaning the crushing blades. The bottom of the crushing chamber is equipped with an external discharge channel directly facing the airflow cleaning zone. The external discharge channel is equipped with an inclined filter screen and a second vibrator that drives the inclined filter screen. A secondary material collection channel is connected below the inclined filter screen.

[0007] As a preferred technical solution of the crushing device of the present invention: a number of heating wires are evenly embedded on the heating slope surface, and the side of the alloy dividing mesh facing upward adopts a pointed structure.

[0008] As a preferred technical solution of the crushing device of the present invention: a sleeve is fixedly installed on the top side opening of the feed hopper by a bracket, a feeding gap is reserved between the bottom end of the sleeve and the inner partition, the vertical height of the lower pressure cylinder is greater than the vertical dimension of the feeding gap, and a fixed piston ring that cooperates with the lower pressure cylinder is configured on the inner wall of the bottom opening of the sleeve.

[0009] As a preferred technical solution of the crushing device of the present invention: the bottom of the inner partition is connected to a corrugated sleeve aligned with the alloy dividing mesh, the vibrating cylinder is connected to the lower side of the corrugated sleeve, and multiple contact inclined plates are staggered inside the vibrating cylinder.

[0010] As a preferred technical solution of the crushing device of the present invention: the first sensor probe is located at the bottom of the vibrating cylinder with an opening between the crushing blades, and the bottom of the crushing chamber has an outlet that connects the cross crushing area and the collector. The second sensor probe is located at the outlet between the crushing blades.

[0011] As a preferred embodiment of the pulverizing device of the present invention: an air supply mechanism is fixedly installed on the bottom side of the inner partition plate. The air supply mechanism includes an air inlet pipe and an air outlet. The air inlet pipe is equipped with a filter cover, and an air knife is installed at the air outlet. The air knife includes a vertically penetrating air outlet cavity and multiple air outlet gaps. The air outlet cavity is directly opposite the air outlet, and the air outlet gaps are directly opposite the pulverizing blade portion that rotates to the airflow cleaning zone.

[0012] As a preferred technical solution of the crushing device of the present invention: the external discharge channel is provided with a guide plate that feeds material toward the top area of ​​the inclined filter screen, and the bottom opening of the external discharge channel is connected to an external collector.

[0013] This invention also provides a dual-cavity linkage pulverization method for polyester raw materials used in sound-absorbing cotton, comprising the following steps:

[0014] Step 1: Evenly feed the polyester raw material into the feeding trough of the hopper.

[0015] Step 2: Preheat and dry the raw material using the heating structure on the inner partition. The polyester raw material is guided along the slope to the alloy dividing mesh.

[0016] Step 3: Activate the telescopic mechanism to drive the lower pressure cylinder to press down vertically, and the polyester raw material is initially divided by the alloy dividing mesh.

[0017] Step 4: The primary crushed material enters the vibrating cylinder, and the first vibrator drives the vibrating cylinder to vibrate, thereby achieving secondary dispersion of the polyester raw material.

[0018] Step 5: After the dispersed fragments fall into the cross-crushing zone, the first sensor probe detects the polyester raw material and triggers the two sets of crushing blades to start crushing.

[0019] Step 6: The qualified polyester raw materials after cross-shearing and crushing are discharged into the collector through the discharge port, and the discharge status is monitored by the second sensor probe.

[0020] Step 7: During the crushing process, the air knife blows airflow into the crushing blades in the airflow cleaning zone to clean the residual polyester material on the surface of the crushing blades.

[0021] Step 8: Residual polyester raw materials fall into the external discharge channel, and the second vibrator drives the inclined filter screen to vibrate and screen.

[0022] Step 9: After screening, the qualified polyester raw materials are collected into the collector through the secondary collection channel, while the substandard polyester raw materials are discharged from the external discharge channel.

[0023] Step 10: If the two sensor probes do not detect a polyester material obstruction signal for a preset time, turn off the crushing blades to complete the operation.

[0024] Compared with existing technologies, the beneficial effects of this invention are:

[0025] In this invention, the raw materials are preheated and dried on the heated ramp surface of the feed hopper to prevent adhesion. Combined with the pointed alloy dividing mesh and the forced extrusion of the lower pressure cylinder, the raw materials are initially divided. Secondary dispersion is achieved through the interlocking contact plates and vibration within the vibrating cylinder, breaking up agglomerates and laying the foundation for subsequent pulverization. Simultaneously, the dual-chamber linkage design allows cross-pulverization and airflow cleaning to occur concurrently. The air knife components use high-speed airflow to precisely sweep the blades rotating in the airflow cleaning zone, forcibly stripping away residual raw materials and preventing material accumulation from affecting pulverization efficiency and precision.

[0026] In this invention, the inclined filter screen of the external discharge channel, together with the second vibrator, performs secondary screening of the small amount of substandard raw materials remaining on the blades. The qualified materials are collected into the collector, while the substandard materials can be recycled and reprocessed, significantly improving the utilization rate of raw materials. In addition, dual sensor probes are configured to monitor the feeding and discharging status in real time. When there is no raw material, the crushing blades are automatically turned off to avoid idling and energy consumption, thus realizing intelligent start-stop control. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the pulverizing device of the present invention.

[0028] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0029] Figure 3 for Figure 2 A magnified structural diagram of part C in the middle.

[0030] Figure 4 for Figure 1 A magnified structural diagram of section B in the middle.

[0031] Figure 5 This is a schematic diagram of the structure in the present invention where an air outlet gap is opened on the bottom side of the air blade component.

[0032] Wherein: 1-Feeding bin, 101-Inner partition, 1011-Heating ramp, 1012-Alloy dividing mesh, 102-Feeding trough, 103-Feeding trough, 104-Sleeve, 1041-Fixed piston ring; 2-Grinding bin, 201-Grinding chamber, 201a-Cross-grinding zone, 201b-Airflow cleaning zone, 202-Grinding blade, 203-First sensor probe, 204-Second sensor probe, 205-Exhaust port; 3-Telescopic Mechanism, 4-lower pressure cylinder; 5-corrugated sleeve; 6-vibrating cylinder; 601-contact inclined plate; 7-first vibrator; 8-air supply mechanism; 801-air inlet pipe; 8011-filter cover; 802-air outlet; 803-air knife; 8031-air outlet cavity; 8032-air outlet gap; 9-collector; 10-external discharge channel; 11-guide inclined plate; 12-inclined filter screen; 13-second vibrator; 14-secondary collection channel; 15-external collector. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] Example 1: This invention designs a dual-chamber linkage crushing device for polyester raw materials used in sound-absorbing cotton. The crushing device has a vertically integrated layout from top to bottom, as shown below. Figure 1 The feed bin 1, crushing bin 2, and collector 9 are configured sequentially. The core working area is the crushing chamber 201 inside the crushing bin 2. Two sets of high-speed rotating crushing blades 202 are installed in the crushing chamber 201. Through the linkage of the two chambers (the cross crushing zone 201a and the airflow cleaning zone 201b work together), the crushing of raw materials and the cleaning of blades are carried out simultaneously. The auxiliary structures such as the external discharge channel 10 and the secondary collection channel 14 are set up to form a complete process of "feeding-pretreatment-crushing-screening-collection".

[0035] (a) Feed silo and ancillary structures

[0036] Inner partition 101 (e.g.) Figure 1 , Figure 2 , Figure 3 The inner partition 101 is horizontally installed inside the feed hopper 1, dividing the feed hopper 1 into an upper feeding trough 102 and a lower discharging trough 103. A heating ramp 1011 is provided on the upper side of the inner partition 101, and several heating wires are evenly embedded in the heating ramp 1011 for preheating and drying the raw materials. An alloy dividing mesh 1012 is fixedly installed at the center of the inner partition 101. The upward-facing side of the alloy dividing mesh 1012 has a pointed structure for preliminary cutting of the raw materials.

[0037] Sleeve 104 (e.g.) Figure 1 , Figure 3 The sleeve 104 is fixedly installed at the top opening of the feed hopper 1 via a bracket. A feeding gap (designed to be as large as possible to prevent material jamming) is reserved between the bottom end of the sleeve 104 and the inner partition 101. A fixed piston ring 1041 is configured on the inner wall of the bottom opening of the sleeve 104 to cooperate with the lower pressure cylinder 4 to form a closed lower pressure channel.

[0038] Telescopic mechanism 3 and pressing cylinder 4 (e.g.) Figure 1 , Figure 3 The telescopic mechanism 3 is installed above the sleeve 104, with its output end facing downwards to drive the lower pressure cylinder 4. The lower pressure cylinder 4 is vertically aligned with the alloy dividing mesh 1012, and the vertical height of the lower pressure cylinder 4 is greater than the vertical dimension of the feed gap.

[0039] Corrugated sleeve 5, vibrating cylinder 6 and first vibrator 7 (e.g.) Figure 1 , Figure 3 The bottom of the inner partition 101 is connected to a corrugated sleeve 5 aligned with the alloy dividing mesh 1012. The lower side of the corrugated sleeve 5 is fixedly connected to the vibrating cylinder 6. Multiple contact inclined plates 601 are staggered inside the vibrating cylinder 6. The first vibrator 7 drives the vibrating cylinder 6, providing vibration power to the vibrating cylinder 6. The elastic structure of the corrugated sleeve 5 can buffer the vibration transmission.

[0040] Gas supply mechanism 8 and air knife component 803 (e.g.) Figure 1 , Figure 2 , Figure 5 An air supply mechanism 8 is fixedly installed on the bottom side of the inner partition 101. The air supply mechanism 8 includes an air inlet pipe 801 and an air outlet 802. A filter cover 8011 (for filtering impurities in the air) is configured at the end of the air inlet pipe 801. An air knife 803 is installed at the air outlet 802. The air knife 803 includes a vertically penetrating air outlet cavity 8031 ​​and multiple air outlet gaps 8032. The air outlet cavity 8031 ​​is directly opposite the air outlet 802, and the air outlet gaps 8032 are directly opposite the shredding blade 202 portion that rotates to the airflow cleaning zone 201b.

[0041] (ii) Crushing chamber and auxiliary structures

[0042] Grinding chamber 201 (e.g.) Figure 1 , Figure 2 The crushing chamber 201 is divided into a cross-crushing zone 201a and an airflow cleaning zone 201b. The cross-crushing zone 201a is located in the area where the two sets of crushing blades 202 intersect, and its bottom is vertically connected to the collector 9 through the discharge port 205. The airflow cleaning zone 201b is located between the crushing blades 202 and the inner wall of the crushing chamber 201, and is used to clean the residual raw materials on the blades.

[0043] Sensor probes (such as) Figure 1 , Figure 2 The first sensor probe 203 is installed on the inner wall of the crushing chamber 201, with its horizontal detection position between the bottom opening of the vibrating cylinder 6 and the crushing blade 202, and is used to detect whether the raw material has entered the crushing area. The second sensor probe 204 is also installed on the inner wall of the crushing chamber 201, with its horizontal detection position between the discharge port 205 and the crushing blade 202, and is used to monitor the discharge of the raw material.

[0044] External drainage channel 10 (e.g.) Figure 1 , Figure 4 ): Installed at the bottom of the crushing chamber 2, directly opposite the airflow cleaning zone 201b. An inclined guide plate 11 is installed inside the external discharge channel 10 (for feeding material towards the top area of ​​the inclined filter screen 12). The bottom opening of the external discharge channel 10 connects to an external collector 15 for discharging excess raw materials.

[0045] Inclined filter 12 and second vibrator 13 (e.g.) Figure 1 , Figure 4 An inclined filter screen 12 is installed at an angle inside the external discharge channel 10, with its aperture matching the particle size of the qualified raw material. A second vibrator 13 drives and connects to the inclined filter screen 12, and its vibration frequency is synchronized with that of the first vibrator 7 to avoid equipment resonance. In addition, a secondary collection channel 14 is connected below the inclined filter screen 12, and its other end is connected to the collector 9, used to collect the qualified raw material screened by the inclined filter screen 12 into the collector 9.

[0046] (iii) Collector

[0047] like Figure 1 The collector 9 is located directly below the crushing chamber 2 and is vertically connected to the cross crushing zone 201a through the discharge port 205. It is used to collect qualified raw materials from the main crushing process and to receive qualified raw materials after screening from the secondary collection channel 14, thus achieving centralized collection.

[0048] Example 2: This invention provides a processing method for pulverizing polyester raw materials used in sound-absorbing cotton. The specific method is as follows:

[0049] (a) Raw material introduction and preliminary treatment

[0050] The sound-absorbing cotton to be crushed is evenly fed into the feeding trough 102 of the hopper 1 using polyester raw material. Under the inclined guidance of the heated slope 1011, the raw material automatically slides towards the central alloy dividing mesh 1012 area. During this process, the heating wire in the heated slope 1011 is energized and heats up to preheat and dry the raw material, remove the surface moisture, and prevent the raw material from sticking together during the crushing process.

[0051] The telescopic mechanism 3 is activated, and the lifting cycle is dynamically adjusted according to the raw material feed rate. The telescopic mechanism 3 drives the lowering cylinder 4 to perform vertical reciprocating motion. When the lowering cylinder 4 descends, its outer wall tightly engages with the fixed piston ring 1041 at the bottom of the sleeve 104, forming a closed pressing channel, which vertically presses the polyester raw material directly below onto the alloy dividing mesh 1012. Utilizing the upward-facing pointed structure of the alloy dividing mesh 1012, the raw material is initially cut and divided, breaking down large pieces of raw material into primary fragments suitable for subsequent crushing, effectively reducing the load on subsequent crushing.

[0052] (ii) Secondary dispersion and precision feeding

[0053] The initial fragments, after preliminary segmentation, fall through the alloy dividing mesh 1012 into the corrugated sleeve 5 below, and then into the vibrating cylinder 6. The first vibrator 7 is started, and the vibration frequency is set to ensure sufficient dispersion of the raw materials. During the vibration process, the vibrating cylinder 6 drives the internally staggered contact inclined plates 601 to shake synchronously. The initial fragments collide with the contact inclined plates 601 multiple times in the cylinder, achieving secondary dispersion, breaking the agglomeration of the raw materials, and ensuring the uniformity of subsequent crushing.

[0054] The elastic structure of the corrugated sleeve 5 can buffer the vibration transmission of the vibrating cylinder 6 and avoid impact damage to other components of the feed hopper 1. The dispersed crushed material falls precisely from the bottom opening of the vibrating cylinder 6 into the cross crushing zone 201a of the crushing chamber 201 (the bottom opening of the vibrating cylinder 6 is vertically aligned with the cross crushing zone 201a to ensure feeding accuracy).

[0055] (III) Dual-cavity linkage fine grinding

[0056] When the first sensor probe 203 detects a material obstruction signal (the detection position is between the bottom opening of the vibrating cylinder 6 and the crushing blade 202, ensuring that the raw material is detected entering the crushing area), it immediately sends a signal to the control system, triggering the start of the drive motor of the crushing blade 202, which drives the two sets of crushing blades 202 to rotate at high speed. By utilizing the mutual cross-shearing action of the two sets of blades, the material falling into the cross crushing area 201a is subjected to secondary fine crushing. The raw material that meets the preset particle size requirements after crushing is vertically downward under the action of gravity and is discharged into the collector 9 through the discharge port 205 at the bottom of the crushing chamber 2.

[0057] The second sensor probe 204 monitors the area of ​​the discharge port 205 in real time (the detection position is between the discharge port 205 and the crushing blade 202), and synchronously feeds back the raw material discharge signal. The control system records the signal trigger interval between the first sensor probe 203 and the second sensor probe 204. When neither set of probes detects a raw material obstruction signal within a continuous time T0 (T0 is a preset continuous time adjusted according to the raw material crushing efficiency), it is determined that there is no raw material to be crushed in the cross crushing zone 201a. The control system automatically commands the drive motor of the crushing blade 202 to shut down, avoiding energy waste caused by the equipment running idle.

[0058] (iv) Blade cleaning and secondary screening

[0059] During the operation of the crushing blade 202, the air supply mechanism 8 is activated simultaneously. Outside air enters the air supply mechanism 8 through the air inlet pipe 801 (filter cover 8011 filters impurities to prevent contamination of raw materials), is compressed, and is delivered from the air outlet 802 to the air outlet chamber 8031 ​​of the air knife component 803. Then, through multiple air outlet gaps 8032, a high-speed airflow is formed that can effectively strip away residual raw materials from the blade. Since the air outlet gaps 8032 are directly opposite the crushing blade 202 portion that has rotated to the airflow cleaning zone 201b, the high-speed airflow blows vertically onto the blade surface, forcibly stripping away residual and attached polyester raw materials during the crushing process, preventing material accumulation on the blade from affecting crushing efficiency and crushing accuracy.

[0060] The stripped raw materials (including a small amount of large-sized polyester raw materials that have re-agglomerated due to forced extrusion) fall vertically into the outer discharge channel 10 at the bottom of the crushing chamber 2 under the guidance of airflow and gravity, and are then guided by the guide plate 11 to the top area of ​​the inclined filter screen 12. The second vibrator 13 is activated to drive the inclined filter screen 12 to vibrate (the vibration frequency is synchronized with the first vibrator 7 to avoid resonance). The pore size of the inclined filter screen 12 matches the particle size of the qualified raw materials, and the raw materials are screened again.

[0061] Raw materials that meet the size requirements pass through the inclined filter screen 12, and are collected into the collector 9 through the secondary collection channel 14, where they are combined with the qualified raw materials from the main crushing process.

[0062] Excessive raw materials (mainly agglomerated large-size polyester raw materials peeled off from the blades) slide along the inclined filter screen 12 and are discharged into the external collector 15 from the bottom opening of the external discharge channel 10. After collection, they can be reintroduced into the feed hopper 1 for secondary crushing to improve the utilization rate of raw materials.

[0063] The main reason why this device does not have a screening structure in the collector 9 area directly below the cross-crushing zone 201a is as follows:

[0064] 1. The two sets of crushing blades 202 adopt the cross crushing zone 201a design, which achieves secondary fine crushing through high-speed cross shearing. Its crushing intensity and shearing efficiency can ensure that the raw materials that naturally leave the blades can meet the preset particle size requirements without additional screening.

[0065] 2. If a screening structure is set in the collector 9, it will increase the resistance of the raw material falling, causing the qualified raw material to accumulate, affecting the crushing continuity and discharge efficiency; while transferring the screening function to the discharge channel 10, it only treats the small amount of substandard particles left by the blades, without interfering with the main crushing process.

[0066] 3. The absence of a screening structure in the collector 9 avoids screen clogging and reduces the frequency of equipment cleaning; the inclined filter 12 of the external discharge channel 10, in conjunction with the second vibrator 13, makes cleaning convenient and does not affect the operation of the main equipment, thus reducing maintenance costs.

[0067] 4. The qualified raw materials from the main crushing process directly enter the collector 9 to avoid raw material contamination or loss caused by secondary screening and ensure the purity of the final product.

[0068] (v) Completion of crushing and equipment reset

[0069] When the raw material feeding is completed and the first sensor probe 203 and the second sensor probe 204 have no signal trigger for a duration of T0, the crushing blade 202 stops working. The air supply mechanism 8 and the second vibrator 13 continue running for a preset time to ensure thorough cleaning of the blade surface and residual raw material in the external discharge channel 10. All operating components are shut down. After the equipment has completely stopped, the qualified polyester crushed material in the collector 9 is cleaned and sealed for later use. Excessive raw material in the external collector 15 is cleaned and recovered. After checking that all components of the device are normal, the crushing operation is complete.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-cavity linked crushing device for polyester raw materials of sound-absorbing cotton, the crushing device is sequentially arranged from top to bottom into a feeding bin (1), a crushing bin (2), and a collector (9), and the crushing bin (2) is internally provided with two groups of crushing blades (202) in a crushing cavity (201), characterized in that: the feeding bin (1) is provided with an internal partition (101), a feeding chute (102) located on the internal partition (101), and a discharging chute (103) located below the internal partition (101), a heating slope (1011) is arranged on the upper side of the internal partition (101), an alloy dividing screen (1012) is arranged at the center position of the internal partition (101), a vibrating cylinder (6) in communication with the alloy dividing screen (1012) is arranged at the bottom side of the internal partition (101), and a first vibrator (7) drivingly connected with the vibrating cylinder (6) is arranged, a telescopic mechanism (3) is arranged at the top of the feeding chute (102), and a downwardly drivingly connected pressing cylinder (4) vertically aligned with the alloy dividing screen (1012) is arranged at the output end of the telescopic mechanism (3); the crushing cavity (201) comprises a cross-crushing area (201a) and an airflow cleaning area (201b), the cross-crushing area (201a) is located in the mutual intersection area of the two groups of crushing blades (202) and vertically communicates with the collector (9) at the bottom, the bottom opening of the vibrating cylinder (6) is opposite to the cross-crushing area (201a), the crushing cavity (201) is provided with a first sensing probe (203) opposite to the top of the cross-crushing area (201a) and a second sensing probe (204) opposite to the bottom of the cross-crushing area (201a), and the airflow cleaning area (201b) is located between the crushing blades (202) and the inner wall of the crushing cavity (201); the discharging chute (103) is provided with an air knife (803) for cleaning the crushing blades (202); the bottom of the crushing bin (2) is provided with an external discharge passage (10) opposite to the airflow cleaning area (201b), the external discharge passage (10) is provided with an inclined filter screen (12) and a second vibrator (13) drivingly connected with the inclined filter screen (12), and the inclined filter screen (12) is connected with a secondary collecting passage (14) below. 2.The double-cavity linked crushing device for polyester raw materials of sound-absorbing cotton according to claim 1, characterized in that: the heating slope (1011) is uniformly embedded with a plurality of heating wires, and the upward side of the alloy dividing screen (1012) adopts a pointed structure. 3.The double-cavity linked crushing device for polyester raw materials of sound-absorbing cotton according to claim 1, characterized in that: a sleeve (104) is fixedly installed on the top opening of the feeding bin (1) through a support, a feeding gap is reserved between the bottom end of the sleeve (104) and the internal partition (101), the vertical height of the pressing cylinder (4) is greater than the vertical dimension of the feeding gap, and a fixed piston ring (1041) matched with the pressing cylinder (4) is arranged on the inner wall of the bottom opening of the sleeve (104). 4.The double-cavity linked crushing device for polyester raw materials of sound-absorbing cotton according to claim 1, characterized in that: ​ ​ ​ ​ ​ The inner partition plate (101) bottom is connected with the corrugated sleeve (5) aligned with the alloy partition net (1012), the vibrating cylinder (6) is connected at the lower side of the corrugated sleeve (5), and multiple contact inclined plates (601) are staggered arranged inside the vibrating cylinder (6).

5. The double-cavity linked crushing device for polyester raw materials of sound-absorbing cotton according to claim 1, characterized in that: The first sensing probe (203) horizontally detects the position between the bottom opening of the vibrating cylinder (6) and the crushing blade (202), the bottom of the crushing bin (2) is provided with a discharge port (205) connected with the cross crushing area (201a) and the collector (9), and the second sensing probe (204) horizontally detects the position between the discharge port (205) and the crushing blade (202).

6. The double-cavity linked crushing device for polyester raw materials of sound-absorbing cotton according to claim 1, characterized in that: The inner partition plate (101) bottom is connected with the corrugated sleeve (5) aligned with the alloy partition net (1012), the vibrating cylinder (6) is connected at the lower side of the corrugated sleeve (5), and multiple contact inclined plates (601) are staggered arranged inside the vibrating cylinder (6).

7. The double-cavity linked crushing device for polyester raw materials of sound-absorbing cotton according to claim 1, characterized in that: The outer discharge channel (10) is provided with a material guiding inclined plate (11) facing the top end area of the inclined filter screen (12), and the bottom opening of the outer discharge channel (10) is connected with the external collector (15). The following steps are included:

8. A double-cavity linked crushing method of polyester raw material for sound-absorbing cotton, applied to the double-cavity linked crushing device of polyester raw material for sound-absorbing cotton in any one of claims 1 to 7, characterized in that, Step one, uniformly introducing the polyester raw materials into the feeding groove (102) of the feeding bin (1); Step two, preheating and drying the raw materials by the heating inclined surface (1011) on the inner partition plate (101), and guiding the polyester raw materials along the heating inclined surface (1011) to the alloy partition net (1012); Step three, starting the telescopic mechanism (3) to vertically press down the lower pressing cylinder (4), and the polyester raw materials are preliminarily divided by the alloy partition net (1012); Step four, the primary crushed materials enter the vibrating cylinder (6), the first vibrator (7) drives the vibrating cylinder (6) to vibrate, and the polyester raw materials are dispersed for the second time; Step five, after the dispersed crushed materials fall into the cross crushing area (201a), the first sensing probe (203) detects the polyester raw materials, and triggers the two sets of crushing blades (202) to start crushing; Step six, the qualified polyester raw materials after cross shearing and crushing are discharged into the collector (9) through the discharge port (205), and the second sensing probe (204) monitors the discharge condition; Step seven, during the crushing process, the air knife (803) blows air flow to the crushing blade (202) in the airflow cleaning area (201b) to clean the surface residual polyester raw materials of the crushing blade (202). ​ Step eight, the residual polyester raw materials fall into the discharge channel (10), and the second vibrator (13) drives the inclined filter screen (12) to vibrate and sieve; Step nine, the qualified polyester raw materials after sieving are collected into the collector (9) through the secondary collection channel (14), and the unqualified polyester raw materials are discharged from the discharge channel (10) to the external collector (15); Step ten, when the two sensing probes (the first sensing probe (203) and the second sensing probe (204)) do not detect the polyester raw material blocking signal for a preset time length, the crushing blade (202) is closed, and the work is completed.

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