CN-122008469-A - Thermoplastic raw material foaming forming device for producing chemical fiber products by recycling PET (polyethylene terephthalate)

CN122008469ACN 122008469 ACN122008469 ACN 122008469ACN-122008469-A

Abstract

The invention relates to the technical field of plastic waste recycling, in particular to a thermoplastic raw material foaming forming device for producing chemical fiber products by recycling PET (polyethylene terephthalate), which comprises a frame, wherein a melting foaming box is fixed on the frame, a stirring mechanism is arranged in the melting foaming box, a plurality of air nozzles are uniformly distributed at the top of the melting foaming box, a foaming agent storage tank and a booster pump are also fixedly arranged on the frame, an inlet end of the booster pump is communicated with the foaming agent storage tank through a liquid inlet pipeline, an outlet end of the booster pump is connected with a plurality of branch pipes through a liquid outlet main pipeline, each branch pipe is respectively communicated with a corresponding air nozzle, and a valve body is fixedly arranged on each branch pipe.

Inventors

FENG CHUNXIA
YAO JIANYING
LONG JIAN
LI BIN

Assignees

张家港善和升环保科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (10)

1. The thermoplastic raw material foaming and forming device for producing chemical fiber products by recycling PET comprises a frame (1) and is characterized in that a melting and foaming box (2) is fixed on the frame (1), a stirring mechanism is arranged inside the melting and foaming box (2), and a plurality of air nozzles (5) are arranged at the top of the melting and foaming box (2) at equal intervals; The foaming agent storage tank (6) and the booster pump (7) are further fixedly arranged on the frame (1), the inlet end of the booster pump (7) is communicated with the foaming agent storage tank (6) through a liquid inlet pipeline (8), the outlet end of the booster pump (7) is connected with a plurality of branch pipes (10) through a liquid outlet main pipeline (9), and each branch pipe (10) is respectively communicated with a corresponding air nozzle (5); A valve body (11) is fixedly arranged on each branch pipe (10), a valve rod (12) is rotatably arranged on the valve body (11), and a valve core (13) for opening and closing an air passage in the valve body (11) is fixedly arranged on the valve rod (12); a sliding seat (14) is arranged on the frame (1) in a sliding manner along the horizontal direction, and a low-position shifting plate (15) and a high-position shifting plate (16) are sequentially fixed on the sliding seat (14) from right to left; a main shaft (19) is rotatably arranged on the frame (1), and the main shaft (19) is connected with the driving end of the stirring mechanism, the sliding seat (14) and the driving end of the booster pump (7) through a linkage mechanism; When the main shaft (19) rotates along a first direction, the linkage mechanism synchronously drives the stirring mechanism to operate, drives the booster pump (7) to operate, and drives the sliding seat (14) to horizontally move, so that the low-position shifting plate (15) and the high-position shifting plate (16) can sequentially and alternately shift each valve rod (12) to swing, and a plurality of valve bodies (11) are alternately opened; When the main shaft (19) rotates along a second direction opposite to the first direction, the sliding seat (14) is driven to horizontally move and reset through the linkage mechanism, and the stirring mechanism and the booster pump (7) do not operate at the moment.
2. The thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 1, wherein the stirring mechanism comprises a stirring shaft (3) rotatably installed on a melting foaming box (2), and stirring blades (4) positioned in the inner cavity of the melting foaming box (2) are fixedly installed on the stirring shaft (3).
3. The thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 2, wherein the linkage mechanism comprises a pump shaft (24) connected with an impeller of a booster pump (7) and a screw rod (17) rotatably mounted on a frame (1), the sliding seat (14) is in threaded connection with the screw rod (17), a limit component is arranged on the frame (1) when the sliding seat (14) moves, the main shaft (19) is matched with the pump shaft (24), the screw rod (17) and the stirring shaft (3) through a transmission mechanism, the screw rod (17), the pump shaft (24) and the stirring shaft (3) are synchronously driven to rotate through the transmission mechanism when the main shaft (19) rotates in a second direction opposite to the first direction, and the pump shaft (24) and the stirring shaft (3) are not driven to rotate at the moment.
4. A thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 3, wherein a motor (20) is fixedly arranged on the frame (1), and the output end of the motor (20) is connected with a main shaft (19) through a coupler so as to drive the main shaft (19) to rotate.
5. A thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 3, wherein the limiting component comprises two guide rods (18) symmetrically distributed on two sides of a screw rod (17) and fixed on a frame (1), and the guide rods (18) penetrate through a sliding seat (14).
6. A thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 3, characterized in that the transmission mechanism comprises a main shaft belt wheel (21) fixed on a main shaft (19) and a screw belt wheel (22) fixed on a screw (17), and the main shaft belt wheel (21) and the screw belt wheel (22) are transmitted through a transmission belt (23); The transmission shaft (25) is rotatably arranged on the frame (1), the main shaft (19) is matched with the transmission shaft (25) through a one-way transmission mechanism, the transmission shaft (25) is driven to rotate when the main shaft (19) rotates along a first direction, and the transmission shaft (25) does not rotate when the main shaft (19) rotates along a second direction opposite to the first direction; The transmission shaft (25) is matched with the stirring shaft (3) and the pump shaft (24) through belt wheel mechanisms, and the stirring shaft (3) and the pump shaft (24) are driven to synchronously rotate when the transmission shaft (25) rotates.
7. The thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 6, wherein the unidirectional transmission mechanism rotates a driving gear (30) arranged on a frame (1), a driven gear (31) fixed on a transmission shaft (25) and meshed with the driving gear (30) and a ratchet wheel (32) fixed on a main shaft (19), a pawl (33) matched with the tooth part of the ratchet wheel (32) is hinged on the driving gear (30), and a reset reed (34) attached to one side of the pawl (33) and used for applying pretightening force to the pawl (33) is fixed on the driving gear (30).
8. The thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 6, wherein the pulley mechanism comprises a pump shaft pulley (26) fixed on a pump shaft (24), a transmission shaft pulley (27) fixed on a transmission shaft (25) and a stirring shaft pulley (28) fixed on a stirring shaft (3), and the pump shaft pulley (26), the transmission shaft pulley (27) and the stirring shaft pulley (28) are transmitted through a linkage belt (29).
9. The thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 1, wherein a feeding hopper (35) which is communicated with a melting foaming box (2) and used for adding raw materials into the melting foaming box (2) is fixedly arranged on the frame (1), and a discharge valve is fixedly arranged at the bottom of the melting foaming box (2).
10. The thermoplastic raw material foaming molding device for producing chemical fiber products by recycling PET according to claim 1 is characterized in that when the sliding seat (14) horizontally slides, the valve rod (12) is driven by the low-position shifting plate (15) to deflect 45 degrees to drive the valve core (13) to synchronously rotate 45 degrees, so that the air passage of the valve body (11) is switched from a closed state to a fully opened state, then the sliding seat (14) continues to move, the valve rod (12) is driven by the high-position shifting plate (16) to continuously deflect to 90 degrees to drive the valve core (13) to synchronously rotate to 90 degrees, and the air passage of the valve body (11) is switched from the fully opened state to the closed state again.

Description

Thermoplastic raw material foaming forming device for producing chemical fiber products by recycling PET (polyethylene terephthalate) Technical Field The invention relates to the technical field of plastic waste recycling, in particular to a thermoplastic raw material foaming and forming device for producing chemical fiber products by recycling PET. Background PET (polyethylene terephthalate) is an important thermoplastic polymer, and the consumption of products, especially beverage bottles, is huge, so that a large amount of waste PET is generated, the recovery and the utilization of the waste PET are particularly important for realizing energy conservation and environmental protection, and the recovered PET is prepared into a thermoplastic raw material with a micropore structure through a physical foaming process, so that chemical fiber products such as down-like products, thermal insulation filling materials and the like are produced, and the method is one of effective ways for realizing the upgrading and the reconstruction of the PET. In the physical foaming process, the core links are that a foaming agent is efficiently and uniformly dispersed and dissolved in PET melt to form homogeneous polymer-gas solution, then controllable nucleation and foaming are initiated by pressure relief, the prior kettle type foaming device generally places the molten polymer in a closed high-pressure container, the foaming agent is simultaneously injected into a single or a plurality of points, and then the dispersion is realized by means of mechanical stirring, however, the method has obvious limitation, the single point injection leads to the limited contact area of the gas and the melt, the long diffusion path and low mixing efficiency, and if a plurality of nozzles are adopted to simultaneously inject high-pressure gas into the melt, strong local pressure and flow field disturbance are generated near a plurality of injection points, the disturbance is mutually interfered, the disturbance is caused to flow field disorder in the melt, the uniform distribution of the gas is not favored in a macroscopic range, and meanwhile, a plurality of high-pressure gas is simultaneously opened to cause intense instantaneous load and pressure pulsation on an air source system, the stability and precision of the measurement of the foaming agent are influenced, so that the uniform pore diameter and the regular structure of the foam is difficult to obtain. To this end, we provide a thermoplastic raw material foaming molding apparatus for recycling PET to produce chemical fiber products to solve the above-mentioned problems. Disclosure of Invention The invention aims to provide a thermoplastic raw material foaming and forming device for producing chemical fiber products by recycling PET (polyethylene terephthalate) so as to solve the problems in the background art. In order to achieve the above purpose, the present invention provides the following technical solutions: The thermoplastic raw material foaming and forming device for producing chemical fiber products by recycling PET comprises a frame, wherein a melting foaming box is fixed on the frame, a stirring mechanism is arranged in the melting foaming box, and a plurality of air nozzles are arranged at the top of the melting foaming box at equal intervals; the foaming agent storage tank and the booster pump are also fixedly arranged on the frame, the inlet end of the booster pump is communicated with the foaming agent storage tank through a liquid inlet pipeline, the outlet end of the booster pump is connected with a plurality of branch pipes through a liquid outlet main pipeline, and each branch pipe is respectively communicated with a corresponding air nozzle; a valve body is fixedly arranged on each branch pipe, a valve rod is rotatably arranged on the valve body, and a valve core for opening and closing an air passage in the valve body is fixedly arranged on the valve rod; a sliding seat is arranged on the frame in a sliding manner along the horizontal direction, and a low-position shifting plate and a high-position shifting plate are sequentially fixed on the sliding seat from right to left; a main shaft is rotatably arranged on the frame, and the main shaft is connected with the driving end of the stirring mechanism, the sliding seat and the driving end of the booster pump through a linkage mechanism; when the main shaft rotates along the first direction, the linkage mechanism synchronously drives the stirring mechanism to operate, drives the booster pump to operate, and drives the sliding seat to horizontally move, so that the low-position shifting plate and the high-position shifting plate can sequentially and alternately shift each valve rod to swing, and a plurality of valve bodies are alternately opened; When the main shaft rotates along a second direction opposite to the first direction, the sliding seat is driven to horizontally move and reset through the linkage mechanism