CN111375222A - Outer-mold crystallization production line of polylactic acid container product - Google Patents
Outer-mold crystallization production line of polylactic acid container product Download PDFInfo
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- CN111375222A CN111375222A CN202010229481.9A CN202010229481A CN111375222A CN 111375222 A CN111375222 A CN 111375222A CN 202010229481 A CN202010229481 A CN 202010229481A CN 111375222 A CN111375222 A CN 111375222A
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Abstract
The invention belongs to the technical field of production of out-mold crystallization, and particularly relates to an out-mold crystallization production line of a polylactic acid container product. The outer-mould crystallization production line of the polylactic acid container product comprises a profiling mould conveying line provided with a plurality of lower crystallization profiling moulds, an upper crystallization profiling mould which is positioned above the profiling mould conveying line and matched with at least one lower crystallization profiling mould, wherein the upper crystallization profiling mould is connected with a lifting driving device and is used for injecting boiling water into the lower crystallization profiling mould and a boiling water injection device and a drying device for drying the crystallized polylactic acid container product. The invention has the advantages that: the development and design cost is reduced.
Description
Technical Field
The invention belongs to the technical field of production of out-mold crystallization, and particularly relates to an out-mold crystallization production line of a polylactic acid container product.
Background
Polylactic acid container products, which belong to degradable environment-friendly products.
For example: the container tableware, bowls, plates and the like are made of polylactic acid, bamboo fiber, PBAT, straw and the like.
When the polylactic acid container product is processed and manufactured, an injection mold is utilized for processing, meanwhile, crystallization (namely annealing treatment) is directly carried out in the mold after the processing is finished, the mold is directly crystallized and dried, the requirement on the mold is very high, the development cost of the mold is higher, meanwhile, the crystallization in the mold can lead to longer whole production period, and the requirement on the production capacity of batches cannot be met.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide an in-mold crystallization line and a production line for polylactic acid container products, which can solve the above problems.
In order to achieve the purpose, the invention adopts the following technical scheme:
the outer-mould crystallization production line of the polylactic acid container product comprises a profiling mould conveying line provided with a plurality of lower crystallization profiling moulds, an upper crystallization profiling mould which is positioned above the profiling mould conveying line and matched with at least one lower crystallization profiling mould, wherein the upper crystallization profiling mould is connected with a lifting driving device and is used for injecting boiling water into the lower crystallization profiling mould and a boiling water injection device and a drying device for drying the crystallized polylactic acid container product.
In the above-mentioned outer crystallization production line of mould of polylactic acid container goods, the imitative mould transmission line includes the frame, be equipped with two drive shafts that are parallel to each other and rotate with the frame and be connected at the frame top, the cover is equipped with the drive wheel with drive shaft circumference fixed connection respectively on every drive shaft, be equipped with a plurality of circular gaps that are circumference evenly distributed respectively in the circumference of every drive wheel, still include the link joint conveyer belt that encircles on two drive wheels, be equipped with a plurality of intervals evenly and along the circular pipe of link joint conveyer belt width direction distribution on the internal surface of link joint conveyer belt, and some circular pipes in a plurality of circular pipes block in some circular gaps among them one by one, arbitrary drive shaft passes through transmission structure and is connected with power device, be equipped with a plurality of even crystallization lower moulds in interval on the surface of link joint conveyer belt.
In the above-mentioned production line for the out-mold crystallization of the polylactic acid container product, the thickness of the driving wheel is at least 1/3 times the length of the circular tube, and the thickness of the driving wheel is smaller than the length of the circular tube.
In the production line for the crystallization of the polylactic acid container product outside the mold, two ends of each driving shaft are respectively sleeved with a driving wheel, two driving wheels sleeved on the same driving shaft are parallel to each other, and the arc notch on one driving wheel and the arc notch on the other driving wheel are distributed in pairs in a relative manner.
In the production line for the crystallization of the polylactic acid container product outside the mold, a reserved gap between two adjacent chain plates of the chain plate conveyor belt is smaller than the distance between two adjacent circular pipes.
In the above production line for the crystallization of the polylactic acid container product outside the mold, two symmetrical cross beams are arranged at intervals on the top of the frame, wherein one driving shaft is rotatably arranged at the end part of one opposite end of the two cross beams, and the other driving shaft is rotatably arranged at the end part of the other opposite end of the two cross beams.
In the above production line for crystallizing the polylactic acid container product outside the mold, a bearing seat and a bearing fixed in the bearing seat are respectively fixed at two ends of each beam, and two ends of the driving shaft are inserted into the bearings at the opposite ends of the two beams.
In the above production line for the crystallization of the polylactic acid container product outside the mold, the length of the circular tube is smaller than the width of the chain plate conveyor belt, the chain plate conveyor belt is positioned between two cross beams, and a space is left between two side edges of the chain plate conveyor belt and the cross beams.
In the above-mentioned production line for crystallizing the polylactic acid container product outside the mold, the transmission structure is any one of a chain transmission structure and a belt transmission structure.
In the production line for the crystallization of the polylactic acid container product outside the mold, a water receiving tank positioned below the chain plate conveyor belt is arranged on the rack.
In the above production line for the crystallization outside the mold of the polylactic acid container product, a container positioning chamber and a sink groove communicated with an upper opening of the container positioning chamber are arranged on the upper surface of a lower crystallization profiling mold, the polylactic acid container product is arranged in the container positioning chamber, an upper crystallization profiling mold is downwards inserted into the polylactic acid container product, a plurality of longitudinal through holes which are uniformly distributed in the circumference are arranged in the upper crystallization profiling mold, the lower ends of the longitudinal through holes are communicated with the inside of the polylactic acid container product, the upper ends of the longitudinal through holes are lower than the normal liquid level in the sink groove, an edge part which protrudes outwards is arranged on the outer edge of the upper end of the upper crystallization profiling mold, the upper surface of the edge part is flush with the upper surface of the upper crystallization profiling mold, and the lower surface of the edge part is pressed on the opening of the polylactic acid container product when the upper crystallization profiling mold is arranged in.
In the above-mentioned production line for crystallizing polylactic acid container products outside the mold, the longitudinal through hole is a trapezoidal hole, and the distance between the two waist edges of the longitudinal through hole gradually expands from the axial center of the upper mold of the crystal to the radial direction.
In the above-mentioned production line for the extramold crystallization of the polylactic acid container product, an upper convex column is provided at the axial center of the upper surface of the upper crystallization profiling mold.
In the above-described production line for the in-mold crystallization of a polylactic acid container product, a cantilever extension portion is connected to an upper circumferential portion of one side of a lower crystallization mold, and a sink groove is provided in an upper surface of the cantilever extension portion and an upper surface of the lower crystallization mold.
In the above-mentioned production line for crystallizing the polylactic acid container product outside the mold, an overflow port communicating with the sink tank is provided on one side of the cantilever extension.
In the above-mentioned off-die crystallization production line for polylactic acid container products, lugs and nail passing holes provided in the lugs are provided respectively on the lower sides of the opposite circumferential surfaces of the lower mold for crystallization.
In the above production line for crystallization of the polylactic acid container product outside the mold, the lifting drive device comprises an L-shaped cantilever frame fixed at the top of the rear side of the frame, and the suspended end of the L-shaped cantilever frame is suspended above the chain plate conveyor belt, and the suspended end of the L-shaped cantilever frame is provided with lifting drive cylinders connected with the profiling molds on the crystal one by one.
The lifting driving cylinder is connected with the upper convex column.
In the above-mentioned production line for crystallizing a polylactic acid container product outside a mold, the drying device comprises an inclined conveyor line, the inclined conveyor line is a mesh inclined conveyor line and conveys the polylactic acid container product from a lower end to an upper end thereof, the inclined conveyor line is fixed to a support, an inclined water receiving tray is provided on the support below the inclined conveyor line, an inclined direction of the inclined water receiving tray is aligned with an inclined direction of the inclined conveyor line, a drying box is provided on the support horizontally at an upper end of the inclined conveyor line, and a material receiving platform is provided on the support below an upper end side of the inclined conveyor line.
In the above-mentioned mould outside crystallization production line of polylactic acid container products, the boiling water injection device includes the fixed frame, there are boiling water tanks on the top of the fixed frame, connect with the boiling water outlet pipe equal to copying die on the crystallization on the quantity on the boiling water tank, when the copying die matches and limits the polylactic acid container products between copying die and lower copying die of crystallization on the crystallization, the boiling water outlet pipe injects the boiling water to the copying die of crystallization, install the control valve on the boiling water outlet pipe;
the lower extreme of slope water receiving tray is located the below of water receiving tank, is connected with the drain pipe in the bottom of water receiving tank, and the drain pipe is discharged the water to slope water receiving tray lower extreme, is connected with the wet return at slope water receiving tray lower extreme, and the one end that the slope water receiving tray was kept away from to the wet return upwards connects at the well upper portion or the top of boiling water case, is equipped with the wet return pump on the wet return.
Compared with the prior art, the production line for the crystallization of the polylactic acid container product outside the mold has the advantages that: the structure that crystallization combines the stoving outside adopting the mould can replace the inside crystallization of mould to dry, has not only reduced the mould development design degree of difficulty, has still improved the production productivity moreover.
The quality of the polylactic acid container product can also meet the use requirement.
Drawings
FIG. 1 is a schematic view of a top view of a production line according to the present invention.
Fig. 2 is a schematic perspective view of a production line provided by the present invention.
FIG. 3 is a schematic view of a front view structure of a production line provided by the present invention.
Fig. 4 is a schematic diagram of a transmission line structure of a copying die provided by the present invention.
Fig. 5 is a schematic view of the main structure of the profiling conveying line provided by the invention.
Fig. 6 is an enlarged schematic view of a portion a in fig. 4.
Fig. 7 is an enlarged schematic view of B in fig. 4.
Fig. 8 is a schematic structural diagram of a drying device provided by the invention.
Fig. 9 is a schematic perspective view of a drying device according to the present invention.
In the figure, a profiling die conveying line a, a frame a1, a cross beam a11, a bearing seat a12, a bearing a13, a driving shaft a2, a driving wheel a21, an arc notch a22, a chain plate conveying belt a3, a circular pipe a31, a lower crystallizing profiling die a4, a water receiving tank a5, a lifting driving device a60, a drying device b, an inclined conveying line 1, a lower driving shaft 11, an upper driving shaft 12, a mesh conveying belt 13, a bracket 2, a U-shaped frame body 21, a connecting beam 22, a cross beam 23, a support leg 24, an inclined profile rod 25, a baffle 26, an inclined water receiving tray 3, a drying box 4, a material receiving platform 5, a boiling water injection device 6, a fixing frame 61, a boiling water tank 62, a boiling water outlet pipe 63, a control valve 64, a water outlet pipe 65 and.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
As shown in FIG. 1, the present polylactic acid container product extramold crystallization line comprises a mold transfer line a to which a plurality of lower molds a4 are attached. Specifically, as shown in fig. 4 to 6, the profiling mold conveying line a comprises a frame a1, wherein the frame a1 is a frame constructed by aluminum profiles and comprises a plurality of U-shaped parts and transverse parts connected between two adjacent U-shaped parts, and supporting feet are arranged at the lower ends of the U-shaped parts and used for being in contact with the ground.
As shown in fig. 4 and 5, two driving shafts a2 parallel to each other and rotatably connected with the frame a1 are arranged at the top of the frame a1, and preferably, two cross beams a11 are arranged at the top of the frame a1 at intervals and symmetrically, wherein one driving shaft a2 is rotatably arranged at one end of each of the two cross beams a11, and the other driving shaft a2 is rotatably arranged at the other end of each of the two cross beams a 11.
A bearing seat a12 and a bearing a13 fixed in the bearing seat are respectively fixed at both ends of each cross beam a11, and both ends of the drive shaft a2 are inserted into the bearings a13 at the opposite ends of the two cross beams a 11.
The beam a11 can improve the firmness of the whole frame integral structure, and can be used for installing the driving shaft.
Bearing block a12 is bolted to the end of beam a 11.
The inner ring of the bearing a13 is fixed on the driving shaft a2, the outer ring of the bearing a13 is fixed on the bearing seat a12, and the rotation is realized through the balls in the middle.
Each driving shaft a2 is sleeved with a driving wheel a21 which is fixedly connected with the driving shaft a2 in the circumferential direction, and the driving wheels a21 can be fixedly connected with the driving shafts a2 in the circumferential direction in a flat key and key groove mode. Of course, the circumferential fixed connection can also be realized by adopting a mode that the bolt penetrates in the radial direction.
As shown in fig. 4-6, a plurality of arc notches a22 are respectively arranged in the circumferential direction of each driving wheel a21, the arc notches a22 are semi-circular notches or arc notches smaller than semi-circles, so that the problem that the arc length of each arc notch is long, so that the circular tube a31 cannot be clamped into the corresponding arc notch is avoided.
The chain plate conveying belt a3 is encircled on two driving wheels a21, the chain plate conveying belt a3 is a conveying belt formed by hinging a plurality of chain plates, two adjacent chain plates are hinged through a hinge shaft, a plurality of circular pipes a31 which are evenly spaced and distributed along the width direction of the chain plate conveying belt a3 are arranged on the inner surface of the chain plate conveying belt a3, the diameter of each circular pipe a31 is slightly smaller than the radius of the circular arc notch a22, namely the circular pipes a 3583 and the circular arc notches a22 are in clearance fit, partial circular pipes a31 in the circular pipes a31 are clamped in partial circular arc notches a22 in the circular arc notches a22 one by one, when the driving wheels rotate, the partial circular pipes a31 are clamped in the circular arc notches a22 one by one and leave the circular arc notches a22 one by one, the purpose of conveying is achieved, and any one driving shaft a 2.
The transmission structure is any one of a chain transmission structure and a belt transmission structure.
The power device is a servo motor and the like.
A plurality of crystallization lower dies a4 with uniform intervals are arranged on the outer surface of the chain plate conveyor belt a 3. The lower crystallizing mold a4 has a lower product positioning cavity inside, and the lower crystallizing mold a4 is fixed on the outer surface of one of the chain plates through lugs at two ends. And bolts are arranged on the lugs in a penetrating way and are in threaded connection with the chain plates.
An annular hose is arranged on the inner surface of a chain plate conveyor belt a3, air outlets the quantity of which is consistent with that of the lower crystallization dies a4 are connected on the annular hose, communication holes communicated with the central area of the lower product positioning cavity are respectively arranged on each lower crystallization die a4, the air outlets are inserted into the communication holes one by one, the air outlets are inserted below the end part of one end of each communication hole and the central bottom surface of the lower product positioning cavity, a cylindrical ejector rod which is connected with the air outlets in a sliding manner is respectively arranged in each air outlet, the cylindrical ejector rod moves relative to the air outlets and can extend into the lower product positioning cavity by 1-3mm, one end of the cylindrical ejector rod close to the lower product positioning cavity is closed, namely the closed end can extend into the lower product positioning cavity by 1-3mm, the other end of the cylindrical ejector rod is not closed, a limiting pin is arranged on the outer wall of the cylindrical ejector rod, a strip, o-shaped sealing ring grooves and O-shaped sealing rings arranged in the O-shaped sealing ring grooves are formed in two ends of the outer wall of the cylindrical ejector rod, the O-shaped sealing rings are connected with the inner wall of the air outlet nozzle in a dynamic sealing mode, the annular hose is fixed to the inner surface of the chain plate conveyor belt a3 through a binding belt, and meanwhile, a small high-pressure air blower is arranged on the inner surface of the chain plate conveyor belt a 3. A small high pressure blower is connected to the batteries fixed to the inner surface of the chain-link conveyor a 3.
The small high-pressure blower is started, the air at the moment enters the air outlet nozzle through the annular hose, the cylindrical ejector rod and the air outlet nozzle are circumferentially sealed, the air pushes the cylindrical ejector rod out, and then the closed end of the cylindrical ejector rod stretches into the lower cavity for product positioning for 1-3mm, so that the polylactic acid container product on the profiling mold conveying line a is conveniently subjected to auxiliary driving stripping when falling onto the drying device b.
The rack is provided with a water receiving groove a5 positioned below the chain plate conveyor belt a 3. Because high-temperature water is required to be injected into the polylactic acid container product arranged in the lower crystallization mold a4 during crystallization, and water flowing downwards when the lower crystallization mold a4 faces downwards can be collected along with the circulating rotation of the chain plate conveyor a3, so that the pollution to the working environment is avoided.
Furthermore, two ends of each driving shaft a2 are respectively sleeved with a driving wheel a21, two driving wheels a21 sleeved on the same driving shaft a2 are parallel to each other, and the arc notch a22 on one driving wheel a21 and the arc notch a22 on the other driving wheel a21 are distributed in a pairwise opposite manner.
The reserved gap between two adjacent chain plates of the chain plate conveyor belt a3 is smaller than the distance between two adjacent circular pipes a 31.
The length of the circular tube a31 is less than the width of the flight conveyor a3, flight conveyor a3 is between the two cross beams and a space is left between the two sides of flight conveyor a3 and the cross beams.
The structure can ensure the reliability and stability of transmission, and simultaneously can avoid the transmission incapability caused by mutual interference.
The working principle is as follows:
when the power device is started, the chain plate conveyor belt a3 is driven to rotate, the partial circular pipes a31 are clamped on the circular arc notch a22 of the driving wheel a21 one by one, and leave the circular arc notch a22 one by one along with the rotation of the chain plate conveyor belt a3, and the actions are circulated.
The middle parts of the two cross beams are connected with a transverse horizontal plate, the transverse horizontal plate penetrates through a chain plate conveyor belt a3 and is positioned below the upper profiling die of the crystal, the transverse horizontal plate is connected with a lifting power mechanism, two ends of the transverse horizontal plate are respectively provided with a plurality of discretely arranged directional guide wheels positioned between two vertical opposite side surfaces of the cross beams, the directional guide wheels can ensure the lifting stability of the transverse horizontal plate, the directional guide wheels are always contacted with the two vertical opposite side surfaces of the cross beams, the upper surface of the transverse horizontal plate is provided with a support rod positioned between the two rows of guide wheels and parallel to the cross beams, and the support rod and the circular tube a31 are distributed in a cross shape.
The lifting power mechanism comprises a fixing plate located below the transverse horizontal plate, a plurality of lifting cylinders are arranged on the upper surface of the fixing plate, the lifting cylinders are connected with the lower surface of the transverse horizontal plate, and the lifting cylinders act synchronously.
When crystallization and shaping are needed, the upper crystallization profiling die descends to a set position in the lower crystallization profiling die, a certain bending occurs after the chain plate conveyor belt a3 bears the load, the lifting cylinder drives the transverse horizontal plate to move upwards, the support rod is in contact with the circular pipe a31 and forces the lower crystallization profiling die to move upwards to the set position, and the shaping comprehensiveness of the lower crystallization profiling die and the upper crystallization profiling die to polylactic acid container products in the whole crystallization process is ensured.
The rotation of the chain plate conveyor belt a3 drives the lower crystallization die a4 to move synchronously, so that the product in the lower crystallization die a4 can be driven to complete crystallization, when the lower crystallization die a4 is arranged below the upper crystallization die, high-temperature water is injected into the polylactic acid container product, and the upper crystallization die extends downwards into the polylactic acid container product to keep and shape for a certain time, so that the crystallization is completed.
As shown in fig. 1-3, an upper mold a6 located above the mold conveying line a and matching with at least one lower mold a4, the upper mold a6 being connected to a lifting drive a60, the lower mold a4 being square. For the sake of convenience of fixation, the lower sides of the opposite circumferential surfaces of the lower mold a4 are provided with lugs a46 and nail passing holes provided on the lugs a46, respectively. The screw passing hole is provided with a screw which is in threaded connection with the threaded hole on the chain plate conveyor belt a 3.
As shown in fig. 4 and 7, in order to ensure the shaping quality of the container, an upper crystallization dummy a6 is further included right above the lower crystallization dummy a4, and the upper crystallization dummy a6 has a shape similar to the internal structure of the shaped product to perform the shaping function.
The upper surface of the lower crystallization profiling die a4 is provided with a container positioning chamber a41, the container positioning chamber a41 is opposite to the shape of the container to play a shaping role, and a sinking groove a42 communicated with the upper opening of the container positioning chamber a41, high-temperature water injected from top to bottom is firstly injected into the sinking groove a42, the high-temperature water overflows to a polylactic acid container product needing crystallization, the upper crystallization profiling die a6 extends downwards into the polylactic acid container product, and the two modules realize shaping under the mutual synergistic effect.
The polylactic acid container product is placed in the container positioning chamber a41, the upper crystallization profiling die a6 is downwards inserted into the polylactic acid container product, a plurality of longitudinal through holes a61 which are evenly distributed in the circumference are arranged inside the upper crystallization profiling die a6, the lower ends of the longitudinal through holes a61 are communicated with the inside of the polylactic acid container product, and the upper ends of the longitudinal through holes a61 are lower than the normal liquid level in the sinking groove a 42.
One side of the cantilever extension a44 is provided with an overflow port a45 communicating with the sunken groove a 42. The normal liquid level is below the overflow a 45.
The longitudinal through hole a61 can ensure the contact surface of high-temperature water and the crystallized and shaped product.
The upper end outer edge of the upper crystalline contour mold a6 has an outwardly convex edge portion a62, the upper surface of the edge portion a62 is flush with the upper surface of the upper crystalline contour mold a6, and the lower surface of the edge portion a62 presses against the opening of the polylactic acid container product when the upper crystalline contour mold a6 is placed in the polylactic acid container product.
The edge portion a62 functions as an open press.
Further, the longitudinal through hole a61 of the present embodiment is a trapezoidal hole, and the distance between the two waist edges of the longitudinal through hole a61 gradually expands radially outward from the axial center of the upper mold replica a 6. The structure can enlarge the contact area between the high-temperature water and the inner wall of the polylactic acid container product.
An upper convex column a63 is arranged at the axial center of the upper surface of the upper crystallization profiling die a 6. The design of the upper convex column a63 can facilitate the connection with the lifting driving device. The lifting driving device is a cylinder or an oil cylinder.
A cantilever extension a44 is connected to one side of the lower crystalline replica a4 at the upper middle portion in the circumferential direction, and a recessed groove a42 is provided on the upper surface of the cantilever extension a44 and the upper surface of the lower crystalline replica a 4.
The cantilever structure can facilitate the injection of high-temperature water and has the abdication function with the profiling mould on the crystal.
The working principle is as follows:
the polylactic acid container product is placed in the container positioning chamber a 41;
injecting high-temperature water into the settling tank, wherein the high-temperature water in the settling tank flows to the container positioning chamber a 41;
the upper crystal copying die a6 is extended downward into the polylactic acid container product and fixes the polylactic acid container product, and the high temperature water anneals the polylactic acid container product. The high-temperature water is boiling water.
As shown in fig. 2 to 4, the boiling water injection apparatus 6 for injecting boiling water into the lower crystallization dummy a4, the boiling water injection apparatus 6 of the present embodiment includes a fixed frame 61, a boiling water tank 62 is provided on the top of the fixed frame 61, the boiling water tank 62 is connected with boiling water outlet pipes 63 having the same number as the upper crystallization dummy a6, the boiling water outlet pipes 63 inject boiling water into the lower crystallization dummy a4 when the upper crystallization dummy a6 and the lower crystallization dummy a4 are matched to confine the polylactic acid container product between the upper crystallization dummy a6 and the lower crystallization dummy a4, and the boiling water outlet pipes 63 are provided with control valves 64;
the lower extreme of slope water receiving tray 3 is located the below of water receiving tank a5, is connected with drain pipe 65 in the bottom of water receiving tank a5, and drain pipe 65 discharges into to slope water receiving tray 3 lower extreme, is connected with wet return 66 at slope water receiving tray 3 lower extreme, and wet return 66 keeps away from the one end of slope water receiving tray 3 and upwards connects at the well upper portion or the top of boiling water box 62, is equipped with the return pump on wet return 66.
Through the design of wet return, can form water circulation and utilize, energy-conservation and reduce the cost, simultaneously, can not cause the pollution to the environment.
Of course, a water collecting tank may be connected to the water return pipe, and the water is collected by the water collecting tank and then pumped back to the boiling water tank 62 by the water return pump.
As shown in fig. 1-3 and fig. 8-9, and a drying device b for drying the crystallized polylactic acid container product. The drying device b comprises an inclined conveying line 1, the polylactic acid container product is reversely buckled on the inclined conveying line 1, and the inclined conveying line 1 is obliquely arranged, so that the drying device b can be used for guiding the residual moisture on the inner wall of the polylactic acid container product and improving the drying efficiency.
The inclined conveying line 1 is a mesh inclined conveying line and the inclined conveying line 1 conveys the polylactic acid container products from the lower end toward the upper end thereof, the inclined conveying line 1 is fixed on a support 2, specifically, as shown in fig. 9, the support 2 of the present embodiment includes a plurality of U-shaped frame bodies 21 spaced apart, and the height of the U-shaped frame bodies 21 is gradually increased from the lower side of the inclined conveying line 1 to the upper side thereof, the adjacent two U-shaped frame bodies 21 are connected at the middle portion thereof by a connecting beam 22, the two ends of the top of each U-shaped frame body 21 are connected by a transverse beam 23, and two support legs 24 are provided at the bottom of each U-shaped frame body 21.
The U-shaped frame body 21 is formed by sequentially connecting three aluminum profiles.
The inclined conveyor line also comprises two inclined profile rods 25 which are obliquely arranged, wherein the inclined profile rods 25 are fixed on the transverse beam 23, and the inclined direction of the inclined profile rods 25 is consistent with the inclined direction of the inclined conveyor line 1.
The inclined profile bar 25 is fixed by means of bolt locking.
An inclined water receiving tray 3 positioned below the inclined conveying line 1 is arranged on the support 2, and a water outlet is arranged at the bottom of the lower end of the inclined water receiving tray 3.
The side wall of the inclined water receiving tray 3 is fixed on the bracket through screws.
The inclined water receiving tray 3 has the same inclined direction with the inclined conveying line 1, and a drying box 4 transversely arranged at the upper end of the inclined conveying line 1 and a material receiving platform 5 positioned below the upper end side of the inclined conveying line 1 are arranged on the support 2.
The material receiving platform 5 comprises an aluminum profile underframe and a material receiving flat plate fixed at the top of the aluminum profile underframe, and a first support leg is arranged at the bottom of the aluminum profile underframe and used for supporting.
The inclined water-receiving tray 3 and the inclined conveying line 1 are parallel to each other.
Specifically, this slope transmission line 1 includes that both ends rotate the lower transmission shaft 11 that sets up in two slope section bar 25 lower extreme tip, and both ends rotate the upper transmission shaft 12 that sets up in two slope section bar 25 upper end tip, and lower transmission shaft 11 or upper transmission shaft 12 are connected with transmission, still includes around the mesh conveyer belt 13 on lower transmission shaft 11 and upper transmission shaft 12.
The transmission device comprises a servo motor, and the servo motor is connected with the lower transmission shaft 11 or the upper transmission shaft 12 through a chain transmission structure. The servo motor is a commercial product.
On the inclined upper surface of each inclined profile bar 25, a baffle 26 is provided along the length of the inclined profile bar 25, and the mesh conveyor belt 13 is located between the two baffles 26. The baffle 26 serves as a restraint to prevent the polylactic acid container product from falling off the mesh conveyor belt 13.
In addition, the drying box 4 comprises an arched outer box, one end of the arched outer box is fixed on one of the inclined section bars 25, the other end of the arched outer box is fixed on the other inclined section bar 25, and an electric heating rod or an electric heating wire is arranged on the inner wall of the arched outer box. Of course, a drying box for steam drying is also possible.
The working principle is as follows:
the polylactic acid container product is crystallized from the profiling mold conveying line a, falls and is reversely buckled to the lower end of the inclined conveying line 1, the inclined conveying line 1 at the moment is upwards driven to the drying box 4 for drying, in the conveying process, water remained on the polylactic acid container product falls into the inclined water receiving tray 3, and the dried polylactic acid container product falls onto the material receiving platform 5 from the upper end of the inclined conveying line 1, so that drying is realized.
Example two
The structure and principle of the present embodiment are basically the same as those of the first embodiment, and the different structure is as follows: the thickness of the driving wheel a21 is at least 1/3 the length of the circular tube a31, and the thickness of the driving wheel a21 is less than the length of the circular tube a 31.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. The production line is characterized by comprising a profiling mold conveying line (a) provided with a plurality of lower crystallizing profiling molds (a4), an upper crystallizing profiling mold (a6) which is positioned above the profiling mold conveying line (a) and matched with at least one lower crystallizing profiling mold (a4), a boiling water injection device (6) which is connected with the upper crystallizing profiling mold (a6) and a lifting driving device (a60) and is used for injecting boiling water into the lower crystallizing profiling mold (a4), and a drying device (b) which is used for drying the crystallized polylactic acid container product.
2. An extramold crystallization line for polylactic acid container products according to claim 1, wherein the profiling mold conveying line (a) comprises a frame (a1), two driving shafts (a2) which are parallel to each other and rotatably connected with the frame (a1) are provided on the top of the frame (a1), a driving wheel (a21) fixedly connected with the driving shaft (a2) is sleeved on each driving shaft (a2), a plurality of circular arc notches (a22) are uniformly distributed on the circumference of each driving wheel (a21), a chain plate conveying belt (a3) is provided around the two driving wheels (a21), a plurality of circular tubes (a31) are uniformly spaced and distributed along the width direction of the chain plate conveying belt (a3) are provided on the inner surface of the chain plate conveying belt (a3), and partial circular tubes (a31) of the plurality of circular tubes (a31) are stuck in partial arc notches (a22) of the plurality of circular arc notches (a22), any one driving shaft (a2) is connected with a power device through a transmission structure, a plurality of crystallization lower dies (a4) with uniform intervals are arranged on the outer surface of the chain plate conveyor belt (a3), and a water receiving groove (a5) positioned below the chain plate conveyor belt (a3) is arranged on the rack.
3. The production line for crystallization of polylactic acid container products from outside of mold according to claim 2, wherein a driving wheel (a21) is respectively sleeved at two ends of each driving shaft (a2), two driving wheels (a21) sleeved on the same driving shaft (a2) are parallel to each other, and the arc notch (a22) on one driving wheel (a21) and the arc notch (a22) on the other driving wheel (a21) are distributed in a pairwise opposite manner.
4. An out-of-mold crystallization production line for polylactic acid container products according to claim 2, wherein the gap reserved between two adjacent chain plates of the chain plate conveyor belt (a3) is smaller than the distance between two adjacent circular tubes (a 31).
5. An out-of-mold crystallization production line of polylactic acid container products, according to claim 2, characterized in that two symmetrical cross beams (a11) are arranged at the top of the machine frame (a1), wherein one driving shaft (a2) is rotatably arranged at the end of one of the two cross beams (a11) facing each other, and the other driving shaft (a2) is rotatably arranged at the end of the other of the two cross beams (a11) facing each other.
6. The production line for the extramold crystallization of polylactic acid container products according to claim 5, wherein the length of the circular tube (a31) is smaller than the width of the chain conveyor (a3), the chain conveyor (a3) is located between two cross beams and a space is left between the two side edges of the chain conveyor (a3) and the cross beams.
7. The extramold crystallization production line of polylactic acid container products according to claim 1, wherein a container positioning chamber (a41) is provided on the upper surface of the lower crystallization dummy (a4), and a sinking groove (a42) is in open communication with the upper portion of the container positioning chamber (a41), the polylactic acid container products are placed in the container positioning chamber (a41) and the upper crystallization dummy (a6) is inserted downwards into the polylactic acid container products, a plurality of longitudinal through holes (a61) are provided inside the upper crystallization dummy (a6) and uniformly distributed in the circumferential direction, the lower ends of the longitudinal through holes (a61) are communicated with the inside of the polylactic acid container products, the upper ends of the longitudinal through holes (a61) are lower than the normal liquid level in the sinking groove (a42), the outer edge of the upper crystallization dummy (a6) is provided with an outwardly convex edge portion (a62), the upper surface of the edge portion (a62) is flush with the upper surface of the upper crystallization dummy (a6), the lower surface of the edge portion (a62) is pressed against the opening of the polylactic acid container article when the crystalline upper copying die (a6) is placed in the polylactic acid container article.
8. The off-mold crystallization production line of polylactic acid container products according to claim 7, wherein said longitudinal through hole (a61) is a trapezoidal hole, and the distance between the two waist edges of the longitudinal through hole (a61) gradually increases from the axial center of the upper crystallization mold (a6) radially outward.
9. The line for the out-of-mold crystallization of polylactic acid container products according to claim 2, wherein the drying means (b) comprises an inclined conveyor line (1), the inclined conveyor line (1) being a mesh inclined conveyor line and the inclined conveyor line (1) conveying the bio-based container products from the lower end to the upper end thereof, the inclined conveyor line (1) being fixed to a frame (2), an inclined water receiving tray (3) being provided on the frame (2) below the inclined conveyor line (1), the inclined water receiving tray (3) being inclined in the same direction as the inclined direction of the inclined conveyor line (1), a drying box (4) being provided on the frame (2) transversely at the upper end of the inclined conveyor line (1), and a receiving platform (5) being provided on the frame (2) below the upper end side of the inclined conveyor line (1).
10. The off-mold crystallization production line of polylactic acid container products according to claim 7, characterized in that the boiling water injection device (6) comprises a fixed frame (61), a boiling water tank (62) is arranged on the top of the fixed frame (61), boiling water outlet pipes (63) equal in number to the upper crystallization dummy (a6) are connected to the boiling water tank (62), the boiling water outlet pipes (63) inject boiling water into the lower crystallization dummy (a4) when the upper crystallization dummy (a6) and the lower crystallization dummy (a4) are matched to confine the polylactic acid container products between the upper crystallization dummy (a6) and the lower crystallization dummy (a4), and a control valve (64) is installed on the boiling water outlet pipes (63);
the lower extreme of slope water receiving tray (3) is located the below of water receiving tank (a5), bottom at water receiving tank (a5) is connected with drain pipe (65), drain pipe (65) are discharged the water to slope water receiving tray (3) lower extreme, be connected with wet return (66) at slope water receiving tray (3) lower extreme, the one end that slope water receiving tray (3) were kept away from in wet return (66) is upwards connected at well upper portion or top of boiling water case (62), be equipped with the return pump on wet return (66).
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