CN116200893B

CN116200893B - Dyeing device and process for degradable material polylactic acid PLA

Info

Publication number: CN116200893B
Application number: CN202310136587.8A
Authority: CN
Inventors: 褚剑斌; 唐义伟; 褚艺郎
Original assignee: Yulin Yisheng Textile Technology Co ltd
Current assignee: Yulin Yisheng Textile Technology Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-10-03
Anticipated expiration: 2043-02-20
Also published as: CN116200893A

Abstract

The invention relates to a dyeing device of degradable material polylactic acid PLA, comprising a dyeing box, a deformation unit and the like; the deformation unit is connected with the dyeing box. According to the dyeing machine, the heater is used for heating and heating the dye in the dyeing box, deforming the PLA fabric, increasing the area of the PLA fabric soaked at the same time, tensioning and stretching the PLA fabric, increasing gaps among PLA fibers, facilitating dyeing of the PLA fabric by the dye, increasing dyeing efficiency, and the thread rollers arranged in the shape of the Chinese character 'ba', so that the PLA fabric is relaxed towards two sides, avoiding insufficient dyeing caused by wrinkling of the PLA fabric, and extracting hot air in the dyeing box for drying the PLA fabric, and then back blowing excessive hot air into the dyeing box, so that predrying of the PLA fabric is realized, energy output for heating the air in the dyeing box again is reduced, resource energy is effectively saved, and dripping of the dye is reduced.

Description

Dyeing device and process for degradable material polylactic acid PLA

Technical Field

The invention relates to the field of PLA dyeing, in particular to a dyeing device and a dyeing process of a degradable material polylactic acid PLA.

Background

Polylactic acid fiber (PLA fiber) is prepared by taking starch-containing agricultural products such as corn, wheat, beet and the like as raw materials, fermenting to generate lactic acid, and then performing polycondensation and melt spinning. Because PLA fiber can be naturally degraded, the fiber is an ecological environment-friendly and recyclable green fiber, and polylactic acid fiber has various excellent performances, so that the fiber has wide market potential and needs to develop corresponding dyeing technology.

However, because PLA belongs to hydrophobic materials, the dye-uptake of many dyes to PLA is lower under the conventional condition, and is time consuming, still makes PLA obtain lighter, colour fastness subalternation to when taking place the fold to PLA surface fabric transmission in-process, the edge of the part of rolling up, the fibre of PLA surface fabric is pulled open, and the color is darker, makes the dyeing inhomogeneous, and after dyeing, moisture untimely treatment, then can make the everywhere of dyestuff whereabouts, influence operational environment's health clean and tidy.

Disclosure of Invention

The technical problems of the invention are as follows:

in order to overcome the defects that the dye-uptake of PLA is low, the time is long, the fabric is wrinkled in the transmission process of the PLA fabric, the dyeing is uneven, the moisture is not treated in time after the dyeing, and the dripping of the dye affects the health and the neatness of the working environment, the invention provides a dyeing device and a process of the degradable material polylactic acid PLA.

In order to solve the technical problems, the invention adopts the technical implementation scheme that:

the dyeing device for the polylactic acid PLA of the degradable material comprises a bottom frame, a dyeing box, a filling port and a discharge port; a dyeing box is fixedly connected on the underframe; the upper part and the lower part of the front part of the dyeing box are respectively communicated with a filling port and a discharge port; the left part and the right part of the dyeing box are respectively provided with a first through groove; a dyeing cavity is formed in the dyeing box; the left part and the right part of the dyeing cavity are respectively communicated with a first through groove; the device also comprises a dyeing unit, a deformation unit, an anti-wrinkling unit, a drying unit, a water removal unit and a sealing unit; the underframe is connected with a dyeing unit; the dyeing unit is connected with the dyeing box; the underframe is connected with a deformation unit; the deformation unit is connected with the dyeing box; the left part and the right part of the dyeing box are connected with crease-resist units; the PLA fabric is led into a dyeing box and is wound on a dyeing unit for dyeing, the crease-resist unit flattens the PLA fabric, the deformation unit folds the PLA fabric into two mirror-image sigma shapes in the dyeing cavity, and the PLA fabric dyed simultaneously is increased; the dyeing box is connected with a drying unit; the drying unit is connected with a water removal unit; the left part of the drying unit is connected with a sealing unit; the right part of the sealing unit is connected with the dyeing box.

Further, the dyeing unit comprises a spring frame, a balance frame, a connecting rod, a first guide roller and a second guide roller; the front part and the rear part of the underframe are fixedly connected with a spring frame respectively; the upper parts of the two spring frames are fixedly connected with a balance frame; the left part and the right part of the balancing stand are fixedly connected with two connecting rods respectively; the four connecting rods are connected with the dyeing box in a sliding way; the lower parts of every two adjacent connecting rods are connected with a first guide roller in a common rotation way; the two first guide rollers are positioned in the dyeing cavity; the left part and the right part of the inner bottom surface of the dyeing cavity are respectively connected with a second guide roller; two second guide rollers are respectively arranged below one first guide roller.

Further, the deformation unit comprises an electric sliding rail, an electric sliding block, a traction frame and a third guide roller; an electric sliding rail is arranged below the underframe; the electric sliding rail is connected with a left electric sliding block and a right electric sliding block in a sliding way; the two electric sliding blocks are fixedly connected with a traction frame respectively; the two dragging frames are connected with the dyeing box in a sliding way; the opposite sides of the two traction frames are respectively connected with a third guide roller in a rotating way; two third guide rollers are positioned in the dyeing cavity, and each third guide roller is positioned between one adjacent first guide roller and one second guide roller.

Further, the crease-resistant unit comprises a V-shaped rod, a bracket and a thread roller; the left part and the right part of the dyeing box are fixedly connected with a V-shaped rod respectively; the two V-shaped rods are respectively positioned at the position of one first through groove; a bracket is fixedly connected at the middle parts of the two V-shaped rods respectively; the opposite sides of the two brackets are fixedly connected with the dyeing box; a thread roller is rotatably connected to the front and rear of each V-shaped rod.

Further, two adjacent screw thread rollers are arranged in an eight-shaped mode, and the rotation directions of the screw threads on the two adjacent screw thread rollers are opposite.

Further, the drying unit comprises a protective shell, a heater, a top cover, a porous plate, an air draft assembly, a guide pipe and a drying box; the bottom of the dyeing box is provided with a protective shell; a heater is arranged in the protective shell; the top of the dyeing box is communicated with a top cover; the top cover is connected with the water removing unit; a porous plate is fixedly connected in the top cover; the porous plate is connected with the water removing unit; an exhaust component is arranged at the left part of the porous plate; the left part of the top cover is communicated with a conduit; the left part of the guide pipe is communicated with a drying box; the left part of the drying box is connected with the sealing unit; the right part of the drying box is communicated with the first through groove at the left side; a second through groove for the PLA fabric to pass through is formed in the middle of the drying box; the upper part and the lower part of the drying box are respectively provided with a hot air circulating air chamber; the second through groove is positioned between the two air chambers; a plurality of air holes are formed on the opposite sides of the two air chambers; each air hole is communicated with the second through groove.

Further, the water removing unit comprises an electric actuator, a connecting plate, a sliding rod, a pressing plate, a water absorbing piece, a water blocking piece and a guide plate; two electric actuators are arranged at the upper part of the top cover; the two electric actuator telescopic parts are fixedly connected with a connecting plate respectively; the lower parts of the two connecting plates are fixedly connected with a sliding rod respectively; the two slide bars are both in sliding connection with the top cover; the front parts of the two slide bars are fixedly connected with a pressing plate; the pressing plate is positioned in the top cover, and the front wall in the top cover is connected with a water absorbing piece; the rear part of the water absorbing piece is in contact fit with the pressing plate; the left part of the upper surface of the porous plate is fixedly connected with a water blocking piece with a curved tangential plane; the upper part of the dyeing box is fixedly connected with a guide plate, and the right part of the water absorbing piece is provided with a plurality of water outlets; the guide plate is positioned below the water absorbing piece; the deflector is arranged obliquely right.

Further, the water absorbing member is a sponge absorbent material.

Further, the sealing unit comprises a rolling shaft, a backflow plate, a material conveying nozzle and a non-return plate; the left part of the drying box is rotationally connected with an upper roller and a lower roller, and a soft flannelette layer is laid on the outer surface of the roller; an upper arc-shaped reflux plate and a lower arc-shaped reflux plate which are arranged in a splayed manner are fixedly connected to the left part of the drying box; the tips of the two reflux plates face to the side far away from the roller; the two reflux plates are respectively positioned on the right side of one rolling shaft; the right part of the dyeing box is communicated with a material conveying nozzle for the PLA fabric to pass through; the right part of the material conveying nozzle is movably connected with an upper check plate and a lower check plate; a torsion spring is arranged between the two non-return plates and the material conveying nozzle.

A dyeing process of a degradable material polylactic acid PLA comprises the following steps:

s1: in the preparation stage, penetrating the PLA fabric into a dyeing device, and removing wrinkles and tensioning the PLA fabric;

s2: in the dyeing stage, the dye is heated, the PLA fabric is deformed, the length of the simultaneously dyed fabric is increased, and the dyeing rate of the PLA fabric is promoted in the stretching process of the PLA fabric;

s3: and in the drying stage, the surplus heat generated by heating the dye is recovered, and the PLA fabric is dried after the surplus heat is dried, so that the moisture on the PLA fabric is reduced, the dye is prevented from dripping to pollute the environment after dyeing, and the energy resource is saved.

The invention has the following advantages:

1. through the heater, heat the dyestuff in the dyeing case and intensify for accelerate and promote dyeing efficiency to push the in-process to the PLA surface fabric through two third deflector rolls, realized not only the deformation to the PLA surface fabric, increase the area of the PLA surface fabric that soaks simultaneously, still carry out tensioning and stretching to the PLA surface fabric, make the clearance between the PLA fibre increase, help the dyestuff to the dyeing of PLA surface fabric, increase dyeing efficiency.

2. Adjacent two screw thread rollers are "eight" font setting, and spiral direction is opposite on it for PLA surface fabric is after two screw thread rollers, and the PLA surface fabric is toward both sides diastole, effectively with the fold on the PLA surface fabric spread, avoids the insufficient condition of dyeing that the PLA surface fabric fold brought.

3. Through taking out the hot air in the dyeing case and be used for the drying to PLA surface fabric, then with unnecessary hot air in blowback back dyeing incasement, the flow direction of hot air is opposite with the presupposes removal direction of PLA surface fabric this moment, realizes the predrying to the PLA surface fabric, reduces the energy output to the interior air heating of dyeing case once more, effectively resources are saved energy, reduces the whereabouts of dyestuff.

Drawings

Fig. 1 is a schematic diagram of a first perspective structure of a dyeing apparatus for polylactic acid PLA, a degradable material of the present invention;

FIG. 2 is a schematic view showing a second perspective structure of a dyeing apparatus for polylactic acid PLA, which is a degradable material of the present invention;

FIG. 3 is a cross-sectional view of a dyeing apparatus for polylactic acid PLA, a degradable material of the present invention;

FIG. 4 is a schematic view showing a first combined three-dimensional structure of a dyeing apparatus for polylactic acid PLA, which is a degradable material of the present invention;

FIG. 5 is a schematic perspective view of a crease-resist unit of the dyeing apparatus for polylactic acid PLA of the degradable material of the invention;

FIG. 6 is an enlarged perspective view schematically showing a dyeing apparatus for polylactic acid PLA, which is a degradable material of the present invention, in FIG. 5;

fig. 7 is a schematic perspective view of a drying unit of a dyeing apparatus for polylactic acid PLA, which is a degradable material of the present invention;

FIG. 8 is a schematic view of a second combined perspective structure of the dyeing apparatus for polylactic acid PLA of the degradable material of the invention;

FIG. 9 is a schematic view of a third combined perspective structure of a dyeing apparatus for polylactic acid PLA, a degradable material of the present invention;

FIG. 10 is a first partial cross-sectional view of a sealing unit of the dyeing apparatus of polylactic acid PLA, a degradable material of the invention;

fig. 11 is a second partial cross-sectional view of a sealing unit of the staining apparatus for polylactic acid PLA, a degradable material of the invention.

Reference numerals: 1-chassis, 2-dyeing box, 3-filler, 4-discharge, 5-PLA fabric, 2001-first through slot, 2002-dyeing cavity, 101-spring rack, 102-balance rack, 103-connecting rod, 104-first guide roller, 105-second guide roller, 201-electric slide rail, 202-electric slide block, 203-tractor rack, 204-third guide roller, 301-V-shaped bar, 302-bracket, 303-screw roller, 401-protective housing, 402-heater, 403-top cover, 404-porous plate, 405-draft assembly, 406-conduit, 407-drying box, 40701-second through slot, 40702-air chamber, 40703-air hole, 501-electric actuator, 502-connecting plate, 503-slide bar, 504-pressing plate, 505-water absorbing piece, 506-water blocking piece, 507-guide plate, 601-roller, 602-return plate, 603-delivery nozzle, 604-non-return plate.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Description of the invention 1

The dyeing device for the polylactic acid PLA which is a degradable material comprises a bottom frame 1, a dyeing box 2, a filling port 3 and a discharge port 4 according to the figures 1-3; a dyeing box 2 is fixedly connected on the underframe 1; the front part of the dyeing box 2 is respectively communicated with a filling port 3 and a discharge port 4 from top to bottom; the left part and the right part of the dyeing box 2 are respectively provided with a first through groove 2001; a dyeing cavity 2002 is formed in the dyeing box 2; the left part and the right part of the dyeing cavity 2002 are respectively communicated with a first through groove 2001;

the device also comprises a dyeing unit, a deformation unit, an anti-wrinkling unit, a drying unit, a water removal unit and a sealing unit; the underframe 1 is connected with a dyeing unit; the dyeing unit is connected with the dyeing box 2; the underframe 1 is connected with a deformation unit; the deformation unit is connected with the dyeing box 2; the left part and the right part of the dyeing box 2 are connected with crease-resist units; the dyeing box 2 is connected with a drying unit; the drying unit is connected with a water removal unit; the left part of the drying unit is connected with a sealing unit; the right part of the sealing unit is connected with the dyeing box 2.

Description of the invention

On the basis of the 1 st embodiment, according to fig. 1 and 4, the dyeing unit comprises a spring frame 101, a balancing frame 102, a connecting rod 103, a first guide roller 104 and a second guide roller 105; the front part and the rear part of the underframe 1 are respectively welded with a spring frame 101; the upper parts of the two spring frames 101 are fixedly connected with a balance frame 102; the left part and the right part of the balancing stand 102 are fixedly connected with two connecting rods 103 respectively; the four connecting rods 103 are connected with the dyeing box 2 in a sliding way; the lower parts of every two adjacent connecting rods 103 are connected with a first guide roller 104 in a common rotation way; both first guide rollers 104 are located within dyeing chamber 2002; the left part and the right part of the inner bottom surface of the dyeing cavity 2002 are respectively connected with a second guide roller 105; two second guide rollers 105 are each located below one first guide roller 104.

According to fig. 1 and 4, the deformation unit comprises an electric sliding rail 201, an electric sliding block 202, a traction frame 203 and a third guide roller 204; an electric sliding rail 201 is arranged under the underframe 1; the electric sliding rail 201 is connected with a left electric sliding block 202 and a right electric sliding block 202 in a sliding way; two electric sliders 202 are fixedly connected with a traction frame 203 respectively; the two dragging frames 203 are connected with the dyeing box 2 in a sliding way; a third guide roller 204 is rotatably connected to the opposite sides of the two traction frames 203; two third guide rollers 204 are each located within the dyeing chamber 2002, and each third guide roller 204 is located between an adjacent one of the first guide rollers 104 and one of the second guide rollers 105.

According to fig. 1 and 5-6, the anti-wrinkling unit comprises a V-shaped bar 301, a bracket 302 and a threaded roller 303; the left part and the right part of the dyeing box 2 are respectively welded with a V-shaped rod 301; two V-shaped rods 301 are each located at one first through groove 2001; a bracket 302 is welded at the middle part of each of the two V-shaped rods 301; the opposite sides of the two brackets 302 are welded with the dyeing box 2; a threaded roller 303 is rotatably connected to each of the front and rear portions of each V-shaped rod 301.

The two adjacent screw thread rollers 303 are arranged in a splayed shape, and the screw thread rotation directions on the two adjacent screw thread rollers 303 are opposite, so as to guide the PLA fabric 5 to two sides and avoid the crease of the PLA fabric 5.

Referring to fig. 1 and 7, the drying unit includes a protective case 401, a heater 402, a top cover 403, a porous plate 404, an exhaust assembly 405, a duct 406, and a drying box 407; the bottom of the dyeing box 2 is provided with a protective shell 401; a heater 402 is installed in the protective shell 401; the top of the dyeing box 2 is communicated with a top cover 403; the top cover 403 is connected with the water removing unit; a perforated plate 404 is welded in the top cover 403; perforated plate 404 is connected to a water removal unit; an exhaust component 405 is arranged at the left part of the porous plate 404; the suction assembly 405 is a blower; the left part of the top cover 403 is communicated with a conduit 406; the left part of the guide pipe 406 is communicated with a drying box 407; the left part of the drying box 407 is connected with a sealing unit; the right part of the drying box 407 is communicated with the first through groove 2001 on the left; a second through groove 40701 is formed in the middle of the drying box 407; the drying box 407 is provided with an air chamber 40702 at the upper and lower parts; the second through slot 40701 is located between the two plenums 40702; the opposite sides of the two air chambers 40702 are provided with a plurality of air holes 40703; each air hole 40703 is commonly communicated with the second through groove 40701.

Referring to fig. 1 and 8, the water removal unit includes an electric actuator 501, a connection plate 502, a slide bar 503, a pressing plate 504, a water absorbing member 505, a water blocking member 506 and a deflector 507; two electric actuators 501 are mounted on the upper part of the top cover 403; the electric actuator 501 is an electric push rod; the telescopic parts of the two electric actuators 501 are fixedly connected with a connecting plate 502 respectively; a slide bar 503 is welded at the lower part of each of the two connecting plates 502; both slide bars 503 are slidably connected to the top cover 403; the front parts of the two slide bars 503 are welded with a pressing plate 504 together; the pressing plate 504 is positioned in the top cover 403, and a water absorbing piece 505 is connected to the front wall in the top cover 403; the rear part of the water absorbing piece 505 is in contact fit with the pressing plate 504; a water blocking piece 506 with a curved tangential plane is fixedly connected to the left part of the upper surface of the porous plate 404; the upper part of the dyeing box 2 is connected with a guide plate 507 by bolts, and the right part of the water absorbing piece 505 is provided with a plurality of water outlets; the deflector 507 is positioned below the water absorbing member 505; the deflector 507 is inclined to the right.

The water absorbing member 505 is a sponge absorbent material for filtering and absorbing water evaporated from the dye in the dye box 2.

According to fig. 1 and 9-11, the sealing unit comprises a roller 601, a backflow plate 602, a material conveying nozzle 603 and a non-return plate 604; the left part of the drying box 407 is rotatably connected with an upper roller 601 and a lower roller 601; an upper reflux plate 602 and a lower reflux plate 602 are welded at the left part of the drying box 407; the tips of the two return plates 602 face the side away from the roller 601; two return plates 602 are each located to the right of one roller 601; the right part of the dyeing box 2 is communicated with a material conveying nozzle 603; the right part of the material conveying nozzle 603 is hinged with an upper check plate 604 and a lower check plate 604; a torsion spring is arranged between the two non-return plates 604 and the material conveying nozzle 603.

The outer surface of the roller 601 is coated with a layer of soft fleece layer, so that the two rollers 601 are fully contacted with the PLA fabric 5. And reduces the escape of heat from the drying box 407.

Working principle:

the preparation stage:

referring to the drawings, the specific implementation process shown in fig. 1 to 6 is as follows:

firstly, the PLA dyeing device is fixed in a dyeing workshop, a power supply is connected, then, dye is poured into the dyeing box 2 through the filling port 3, and then, the dye in the dyeing box 2 is heated through the heater 402, so that the dyeing efficiency is accelerated.

Then through connect PLA surface fabric 5 on the traction belt, the traction belt has been wound on the dyeing unit this moment, then, through drawing the traction belt other end, the traction belt drives PLA surface fabric 5 and goes into from the delivery nozzle 603, two non return plates 604 paste on PLA surface fabric 5 simultaneously, block the impurity on the PLA surface fabric 5, then PLA surface fabric 5 is around two screw thread rollers 303 on the right, adjacent two screw thread rollers 303 are the setting of "eight" font, and spiral direction is opposite on it, make PLA surface fabric 5 after two screw thread rollers 303 are passed through, the fold on the PLA surface fabric 5 is relaxed to both sides, effectively will be stretched out, avoid the insufficient circumstances of dyeing that PLA surface fabric 5 fold brought.

Then, the PLA fabric 5 sequentially bypasses the two first guide rollers 104 and the two second guide rollers 105, at this time, the PLA fabric 5 is in a U shape in the dyeing box 2 under the cooperation of the two first guide rollers 104 and the two second guide rollers 105, so that the PLA fabric 5 is dyed more fully in the dyeing cavity 2002, after passing through the two left threaded rollers 303, the PLA fabric is flattened again, and then passes through the second through groove 40701, and the PLA fabric 5 passes out from the left part of the second through groove 40701.

Dyeing:

referring to the drawings, the specific implementation process shown in fig. 1 to 4 is as follows:

after the PLA fabric 5 passes out of the second through groove 40701, the pulling of the PLA fabric 5 is stopped at this moment, the PLA fabric 5 is dyed in the dyeing cavity 2002, under the condition that the performance damage to the PLA fiber is small by the heater 402, the performance requirements of the fiber such as strength and elongation can still be met, the dyeing efficiency of the dye can be effectively accelerated, in order to further improve the dyeing efficiency of the PLA fabric 5, the two electric sliding blocks 202 are controlled to move in the direction of approaching each other by the electric sliding rail 201, one dragging frame 203 is synchronously driven to move in the direction of approaching each other by the electric sliding blocks 202, the two dragging frames 203 are respectively driven to move in the direction of approaching each other by the third dragging frames 204, then the two third idler rollers 204 are contacted with the PLA fabric 5, and the thrust in the horizontal direction is applied to the PLA fabric 5, at this moment, the left end of the PLA fabric 5 is fixed, when the third idler rollers 204 approach each other, the right part of the PLA fabric 5 is brought into the dyeing cavity 2002, the two electric sliding blocks 202 are controlled to stop the dyeing motion when the two third idler rollers 204 approach each other, the two electric sliding blocks 202 do not contact, the dyeing motion is synchronously driven by the two electric sliding blocks 202, the dyeing the PLA fabric is in the shape of the two sigma, the dyeing efficiency of the PLA fabric is effectively increased, the dyeing time is prolonged, and the dyeing time of the PLA fabric is prolonged, and the dyeing time is longer than the dyeing time of the fabric in the space, and the dyeing time is equal to the two sigma time, and the dyeing time is longer than the dyeing time.

And through two third deflector rolls 204 in the pushing process to PLA surface fabric 5, not only realized the deformation to PLA surface fabric 5, increase the area of the PLA surface fabric 5 that soaks simultaneously, still carry out tensioning to PLA surface fabric 5 for clearance between the PLA fibre increases, helps the dyestuff to the dyeing of PLA surface fabric 5, increases the dyeing efficiency.

And (3) drying:

referring to the drawings, the specific implementation process shown in fig. 7 to 11 is as follows:

when the PLA fabric 5 is dyed, the PLA fabric 5 is required to be soaked in the dye, when the dye in the dyeing box 2 is heated, the air at the upper part of the dyeing box 2 is also heated, wherein the moisture in the dye is partially evaporated, in order to recycle the heat of the dye, the air suction component 405 is controlled to start, the air suction component 405 operates, the hot air at the upper part of the dyeing box 2 is sucked through the top cover 403, the hot air is firstly filtered by the water suction piece 505 before entering the top cover 403, the water suction piece 505 absorbs the moisture in the hot air, then the hot air enters the top cover 403 through the porous plate 404, then the air suction component 405 sends the hot air into the air chamber 40702 of the drying box 407 through the guide pipe 406, then the hot air is sprayed out of each air hole 40703, the PLA 5 passes through the second through groove 40701, the hot air dries the moisture on the surface of the PLA fabric 5, at this time, as the two rollers 601 are attached to the surface of the PLA fabric 5, the amount of leakage of the hot air in the second through-slot 40701 from the left part is reduced, and two reverse flow plates 602 arranged in a splayed shape are further arranged beside the two rollers 601, when the hot air in the second through-slot 40701 cannot be discharged from the left side, the hot air is guided to flow towards the right part of the drying box 407 through the reverse flow plates 602, at the moment, the flow direction of the hot air is opposite to the preset moving direction of the PLA fabric 5, the pre-drying of the PLA fabric 5 is realized, then the hot air is enabled to enter the dyeing box 2 again, the energy output of heating the air in the dyeing box 2 again is reduced, the resource energy is effectively saved, meanwhile, the taper shape formed by the two reverse stop plates 604 towards the inside of the dyeing box 2 also effectively reduces the hot air in the dyeing box 2, the right part of the dyeing box 2 is discharged into the external air, the energy resource waste is caused, and the dye dripping is reduced, so that the environment pollution is caused.

When the hot air in the dyeing box 2 is pumped out, the moisture evaporated in the dye is pumped out together, the moisture is absorbed through the water absorbing member 505, only the hot air passes through the porous plate 404, after the PLA dyeing device runs for a period of time, as the moisture absorbed by the water absorbing member 505 increases, the filtering effect of the water absorbing member 505 decreases, the drying process of the PLA fabric 5 is affected, at this time, the two electric actuators 501 are controlled to start, the two electric actuators 501 shrink, synchronously drive one connecting plate 502 to move, the two connecting plates 502 drive the pressing plate 504 to move forward through the sliding rod 503, the pressing plate 504 applies horizontal pressure to the water absorbing member 505, so that the moisture in the water absorbing member 505 is extruded, the extruded moisture falls on the guide plate 507, then the extruded water flows along the guide plate 507 inclined to the right, after the water flows to the right part of the guide plate 507, the water flows out from the water outlet at the right part of the guide plate 507, and is located above the PLA fabric 5, and the extruded water temperature is still higher at this time, so that the extruded water flows out from the water outlet of the guide plate 507 to wet the PLA fabric 5 in advance, thereby accelerating the fabric dyeing efficiency of the PLA fabric 5.

When the water absorbing member 505 is squeezed, the squeezed water in the water absorbing member 505 permeates upward along the through holes on the porous plate 404, and at this time, the water permeated into the porous plate 404 is effectively blocked by the water blocking member 506, and flows to the working position of the air exhausting assembly 405 along the upper surface of the porous plate 404, so that the operation failure of the air exhausting assembly 405 is caused.

The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The dyeing device for the polylactic acid PLA of the degradable material comprises a bottom frame (1), a dyeing box (2), a filling port (3) and a discharge port (4); a dyeing box (2) is fixedly connected on the underframe (1); the front part of the dyeing box (2) is respectively communicated with a filling port (3) and a discharge port (4) up and down; the left part and the right part of the dyeing box (2) are respectively provided with a first through groove (2001); a dyeing cavity (2002) is arranged in the dyeing box (2); the left part and the right part of the dyeing cavity (2002) are respectively communicated with a first through groove (2001);

the device is characterized by further comprising a dyeing unit, a deformation unit, an anti-wrinkling unit, a drying unit, a water removal unit and a sealing unit; the underframe (1) is connected with a dyeing unit; the dyeing unit is connected with the dyeing box (2); the underframe (1) is connected with a deformation unit; the deformation unit is connected with the dyeing box (2); the left part and the right part of the dyeing box (2) are connected with crease-resistant units; the PLA fabric is led into a dyeing box (2) and is dyed by winding on a dyeing unit, the crease-resist unit flattens the PLA fabric, the deformation unit folds the PLA fabric into two mirror-image sigma shapes in a dyeing cavity (2002), and the PLA fabric dyed simultaneously is increased; the dyeing box (2) is connected with a drying unit; the drying unit is connected with a water removal unit; the left part of the drying unit is connected with a sealing unit; the right part of the sealing unit is connected with the dyeing box (2);

the drying unit comprises a protective shell (401), a heater (402), a top cover (403), a porous plate (404), an air draft assembly (405), a guide pipe (406) and a drying box (407); a protective shell (401) is arranged at the bottom of the dyeing box (2); a heater (402) is arranged in the protective shell (401); the top of the dyeing box (2) is communicated with a top cover (403); the top cover (403) is connected with the water removing unit; a porous plate (404) is fixedly connected in the top cover (403); a porous plate (404) is connected with the water removal unit; an air draft assembly (405) is arranged at the left part of the porous plate (404); the left part of the top cover (403) is communicated with a conduit (406); the left part of the guide pipe (406) is communicated with a drying box (407); the left part of the drying box (407) is connected with the sealing unit; the right part of the drying box (407) is communicated with a first through groove (2001) at the left side; a second through groove (40701) for the PLA fabric to pass through is formed in the middle of the drying box (407); the drying box (407) is internally provided with a hot air circulating air chamber (40702) at the upper and lower parts; the second through groove (40701) is positioned between the two air chambers (40702); a plurality of air holes (40703) are formed on the opposite sides of the two air chambers (40702); each air hole (40703) is communicated with the second through groove (40701) together;

the water removal unit comprises an electric actuator (501), a connecting plate (502), a sliding rod (503), a pressing plate (504), a water absorption piece (505), a water blocking piece (506) and a guide plate (507);

two electric actuators (501) are arranged on the upper part of the top cover (403); the telescopic parts of the two electric actuators (501) are fixedly connected with a connecting plate (502) respectively; the lower parts of the two connecting plates (502) are fixedly connected with a sliding rod (503) respectively; both slide bars (503) are in sliding connection with the top cover (403); the front parts of the two slide bars (503) are fixedly connected with a pressing plate (504) together; the pressing plate (504) is positioned in the top cover (403), and the front wall in the top cover (403) is connected with a water absorbing piece (505); the rear part of the water absorbing piece (505) is in contact fit with the pressing plate (504); a water blocking piece (506) with a curved tangential plane is fixedly connected to the left part of the upper surface of the porous plate (404); the upper part of the dyeing box (2) is fixedly connected with a guide plate (507), and the right part of the water absorbing piece (505) is provided with a plurality of water outlets; the deflector (507) is positioned below the water absorbing piece (505); the deflector (507) is obliquely arranged right;

the sealing unit comprises a roller (601), a backflow plate (602), a material conveying nozzle (603) and a non-return plate (604);

an upper roller (601) and a lower roller (601) are rotatably connected to the left part of the drying box (407), and a soft flannelette layer is laid on the outer surface of the rollers (601); an upper arc-shaped reflux plate (602) and a lower arc-shaped reflux plate (407) which are arranged in a splayed shape are fixedly connected to the left part of the drying box; the tips of the two reflux plates (602) face to the side far away from the roller (601); two reflux plates (602) are positioned on the right side of one roller (601); the right part of the dyeing box (2) is communicated with a material conveying nozzle (603) for the PLA fabric (5) to pass through; an upper check plate and a lower check plate (604) are movably connected to the right part of the material conveying nozzle (603); a torsion spring is arranged between the two non-return plates (604) and the material conveying nozzle (603);

the dyeing unit comprises a spring frame (101), a balance frame (102), a connecting rod (103), a first guide roller (104) and a second guide roller (105);

the front part and the rear part of the underframe (1) are fixedly connected with a spring frame (101) respectively; the upper parts of the two spring frames (101) are fixedly connected with a balance frame (102) together; two connecting rods (103) are fixedly connected to the left part and the right part of the balance frame (102) respectively; the four connecting rods (103) are connected with the dyeing box (2) in a sliding way; the lower parts of every two adjacent connecting rods (103) are connected with a first guide roller (104) in a common rotation way; both first guide rollers (104) are positioned in the dyeing cavity (2002); the left part and the right part of the inner bottom surface of the dyeing cavity (2002) are respectively connected with a second guide roller (105); two second guide rollers (105) are positioned below one first guide roller (104) respectively;

the deformation unit comprises an electric sliding rail (201), an electric sliding block (202), a traction frame (203) and a third guide roller (204);

an electric sliding rail (201) is arranged below the underframe (1); a left electric sliding block (202) and a right electric sliding block (202) are connected to the electric sliding rail (201) in a sliding manner; two electric sliding blocks (202) are fixedly connected with a traction frame (203) respectively; the two dragging frames (203) are connected with the dyeing box (2) in a sliding way; a third guide roller (204) is rotatably connected to the opposite sides of the two traction frames (203); two third guide rollers (204) are positioned in the dyeing cavity (2002), and each third guide roller (204) is positioned between one adjacent first guide roller (104) and one second guide roller (105);

the crease-resist unit comprises a V-shaped rod (301), a bracket (302) and a thread roller (303);

the left part and the right part of the dyeing box (2) are fixedly connected with a V-shaped rod (301) respectively; two V-shaped rods (301) are respectively positioned at the positions of one first through groove (2001); a bracket (302) is fixedly connected at the middle part of each of the two V-shaped rods (301); the opposite sides of the two brackets (302) are fixedly connected with the dyeing box (2); a threaded roller (303) is rotatably connected to the front and rear of each V-shaped rod (301).

2. Dyeing apparatus for polylactic acid PLA, a degradable material according to claim 1, characterized in that two adjacent screw rolls (303) are arranged in a "splay" shape, and the screw rotation directions on two adjacent screw rolls (303) are opposite.

3. The dyeing apparatus for polylactic acid PLA, which is a degradable material, according to claim 1, wherein the water absorbing member (505) is a sponge absorbent material.

4. A dyeing process of polylactic acid (PLA) as a degradable material, which uses the dyeing device of the PLA as a degradable material as set forth in any one of claims 1-3, comprising the following steps: