CN113878778B

CN113878778B - Equipment for preparing polylactic acid embryo material

Info

Publication number: CN113878778B
Application number: CN202111175632.8A
Authority: CN
Inventors: 张伟栋; 张伟丹; 张艳娟
Original assignee: Hebei Xiong'an Zhangshi Dandong New Energy Technology Co ltd
Current assignee: Hebei Xiong'an Zhangshi Dandong New Energy Technology Co ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2023-07-07
Anticipated expiration: 2041-10-09
Also published as: CN113878778A

Abstract

The invention relates to equipment for preparing polylactic acid blanks. The polylactic acid powder can be used as a raw material, and the polylactic acid blank is obtained through the processes of charging, hot melting and pressure filtration, forging, forming and cooling discharging, the unique design of the blank pressing workbench ensures that the blank pressing workbench can easily turn around on a conveying device and can not be blocked, the forming die is convenient to detach, different dies can be replaced according to the requirement, and the spring structure of the forming die is matched with the ejector block, so that the demoulding of the formed blank is facilitated; in addition, the designed filter pressing device can effectively press the unmelted matters in the polylactic acid in a molten state to the bottommost part of the blank, so that the later treatment is facilitated; the forging and pressing forming device can forge and press the blank, and the arranged baking oven, hot air device, cold air device and spraying device can be used for preparing polylactic acid blank with better mechanical properties by cooperation, and can be widely applied to different industries; the whole set of equipment circularly works, and has higher production efficiency.

Description

Equipment for preparing polylactic acid embryo material

Technical Field

The invention relates to the technical field of polylactic acid embryo production, in particular to equipment for preparing a polylactic acid embryo.

Background

Polylactic acid is a polymer obtained by polymerizing lactic acid as a main raw material, also called polylactide, and belongs to the polyester family. Polylactic acid has good thermal stability and good solvent resistance, and can be processed in various modes, such as extrusion, spinning, biaxial stretching and injection blow molding. The product made of polylactic acid has good biocompatibility, glossiness, transparency, handfeel and heat resistance, and also has certain antibacterial property, flame retardance and ultraviolet resistance, so that the product has wide application, can be used as packaging materials, fibers, non-wovens and the like, and is mainly used in the fields of clothing (underwear, outerwear), industry (building, agriculture, forestry, papermaking), medical treatment and health and the like.

Polylactic acid has high safety to human body and can be absorbed by tissues, and in addition, the polylactic acid has excellent physical and mechanical properties, and can be applied to the field of biological medicine, such as disposable transfusion tools, disassembly-free operation sutures, medicine relieving packaging agents, artificial fracture internal fixation materials, tissue repair materials, artificial skin and the like. The polylactic acid with high molecular weight has very high mechanical property, has been used for replacing stainless steel in European and American countries, is used in large quantity as a novel orthopedic internal fixation material such as bone nails and bone plates, and can be absorbed and metabolized by human bodies so that patients do not need to take the secondary operation. The added value of the technology is high, and the material is a polymer material with development prospect in the medical industry. However, polylactic acid formed by adopting a common plastic molding process has lower mechanical property, and particularly, the bending strength and the impact strength cannot meet the requirements of various occasions, and cannot be used for manufacturing fracture internal fixation devices.

The polylactic acid is formed by processing through a self-reinforcing technology, the chemical composition of the reinforcing phase and the basic phase is completely the same, the interface of the reinforcing phase and the basic phase on the chemical structure does not exist, and a product with higher mechanical strength can be obtained under the condition that other reinforcing materials are not required to be introduced, so that the polylactic acid is formed by the self-reinforcing technology, and is an ideal method for researching and developing the polylactic acid as a medical material. The polylactic acid blank can be processed and produced by forging and pressing to obtain a more ideal blank.

Disclosure of Invention

In view of the problems existing in the prior art, the invention discloses equipment for preparing polylactic acid blanks, which adopts the technical scheme that the equipment comprises a conveying device, wherein the conveying device is of a chain conveying structure, a driving motor drives a chain wheel to rotate, two chains are arranged on the chain wheel in a transmission fit manner, the chains are positioned at two sides of the conveying device, positioning sliding grooves are formed in equidistant positions of outer rings of the chains on two sides of the conveying device, blank pressing working tables are fixedly connected to the chains at equal intervals, sliding buckles of the blank pressing working tables are in the positioning sliding grooves and can circularly drive along with the chains, the conveying device is divided into four stations from left to right, photoelectric proximity switches are fixedly arranged at the top positions of the side walls of the conveying device corresponding to each station, the four photoelectric proximity switches are distributed at equal intervals, the stop positions of the blank pressing working tables at the four stations are marked through the four photoelectric proximity switches, the blank pressing workbench is driven by a chain to circularly move on a conveying device, and sequentially passes through a feeding station, a heating and melting station, a forging forming station and a discharging station to finish processing of a blank, a storage tank, a baking oven and a cold air box are sequentially arranged above the conveying device from left to right, the storage tank is respectively corresponding to the four stations, an electromagnetic valve is arranged at a discharge hole of the storage tank, the baking oven is fixedly connected to the middle position below the conveying device, the upper baking oven and the lower baking oven are corresponding to each other, the discharged blank pressing workbench can be dried by the baking oven below, the baking oven and the cold air box are communicated, the blank pressing workbench can pass through the baking oven, a press filter device and the forging forming device are fixedly arranged at the top of the baking oven above the conveying device, a pressing discharging device is fixedly arranged at the middle position of the top of the cold air box, and the storage tank and the press filter device are fixedly arranged at the middle position of the top of the cold air box, the forging forming device and the pressing discharging device are respectively in one-to-one correspondence with the four photoelectric proximity switches, the baking box above the conveying device is divided into a heating area and a hot air heat preservation area, an electric heating pipe is arranged in an inner cavity of the heating area of the baking box, the press filter device is located in the heating area of the baking box, a material collecting notch is formed in the middle of the conveying device between the pressing forming device and the pressing discharging device, a collecting drawer is placed in the material collecting notch in a sliding fit mode, the forging forming device is located in the hot air heat preservation area of the baking box, the hot air device is simultaneously connected to the baking box below the conveying device through a pipeline in a communicating mode, the hot air device generates hot air through a hot air blower and blows into the baking box through the pipeline, cold air devices are connected to the tops of the two ends of the cold air box through the pipeline in a communicating mode, cold air devices generate cold air through cold air blowers and blow into the cold air boxes through the pipeline, a spray device is connected to the middle position of the cold air boxes through the pipeline in a communicating mode, a water outlet of the spray device is located on the left side and the right side of the pressing discharging device, the collecting drawer is placed in the sliding fit mode in the collecting notch, the formed embryo material can fall into the collecting drawer through the collecting drawer after the action of the pressing discharging device, and the material can fall into the collecting drawer through the collecting drawer, and the bottom face of the collecting drawer is conveniently falls out of the collecting drawer through the corresponding to the bottom of the pressing discharging device, and the electric heating device can be placed into the electric control device through the electric control device, and the electric control device.

As a preferred scheme of the invention, the blank pressing workbench comprises a front supporting rod and a rear supporting rod which are mutually parallel and fixedly connected to a chain, two ends of the front supporting rod and the rear supporting rod are fixedly buckled in a positioning chute, the upper surface of the front supporting rod is fixedly connected to the front end of a base, a chute is arranged in the middle of the upper surface of the rear end of the base, a blank is convenient to slide down and fall off the blank pressing workbench, a movable cavity is arranged at the lower part of the rear end, the rear supporting rod penetrates through the movable cavity, the rear supporting rod is not connected with the base and plays a supporting role, the base can move relative to the rear supporting rod when moving to the end of a conveying device, the blank pressing workbench is prevented from being blocked at the end of the conveying device and being unable to move, one end of the upper surface of the front supporting rod, which is close to a photoelectric proximity switch assembly is fixedly connected, so that the movement stop position of the blank pressing workbench can be calibrated, a mounting cavity is arranged in the center of the upper surface of the base, a top block is arranged at the bottom of the mounting cavity through screw fit, four shrinkage cavities are arranged on the upper surface of the base, a forming die is fixedly connected to the periphery of the mounting cavity, the forming die is in the mounting cavity, the top block is sliding and inserted into the mounting cavity through screws, the top block is convenient to detach and detach the forming die.

As a preferable scheme of the invention, the forming die is cross-shaped, a die cavity is formed in the middle of the forming die, an inclined chamfer is formed at the edge of an opening at the upper end of the die cavity, so that feeding in the die cavity is facilitated, a filter pressing device and a forging forming device are facilitated to extend into the die cavity, a top block is slidably inserted into the bottom of the die cavity, a discharging chute is formed in one side, close to the chute, of the upper surface of the forming die, so that blanks coming out of the die cavity can slide from the discharging chute, four springs are fixedly connected below the periphery of the forming die, threaded connecting plates are fixedly connected to the lower ends of the springs, the springs are installed in the shrinkage cavity in a one-to-one correspondence manner, and the screws are in threaded connection with the threaded connecting plates.

As a preferred scheme of the invention, the filter pressing device comprises a filter pressing electric telescopic rod fixedly connected to the top of the baking oven, the telescopic end of the filter pressing electric telescopic rod vertically downwards stretches into the inner cavity of the baking oven and is fixedly connected with a filter pressing head, the shape of the filter pressing head is the same as that of an opening of the mold cavity, the filter pressing head can be attached to the inner wall of the mold cavity, the lower surface of the filter pressing head is a plane upper surface which is an arc surface, and a filter hole is formed in the upper surface, so that the polylactic acid in a molten state can be subjected to filter pressing, undissolved particles in the polylactic acid are pressed to the bottommost part, the telescopic end of the filter pressing electric telescopic rod slides through a dredging seat, a mounting hole is formed in the dredging seat and is fixedly arranged at the top of the inner cavity of the baking oven through a screw, a steel needle is fixedly connected to the middle position of the lower surface of the dredging seat, a limit plate is fixedly connected to the side edges of the steel needle, the steel needle corresponds to the filter hole on the filter pressing head one by one, the filter pressing head is clamped between the limit plates in a sliding mode, the arc surface of the filter pressing head is convenient for the melted polylactic acid to flow to be separated after the filter pressing head lifts, the filter pressing head is stably lifted, and the steel needle can be lifted into the hole on the filter pressing head.

As a preferred scheme of the invention, the forging and pressing forming device comprises an upper piezoelectric telescopic rod and a lower supporting electric telescopic rod, wherein the upper piezoelectric telescopic rod is fixedly connected to the top of a baking box above the conveying device, the telescopic end of the upper piezoelectric telescopic rod vertically downwards stretches into the inner cavity of the baking box and is fixedly connected with a pressing head, the pressing head is attached to the inner wall of a die cavity and enters the die cavity, polylactic acid in the pressing head can be forged and pressed, the lower supporting electric telescopic rod is fixedly connected to the middle part of the conveying device and is positioned below a blank pressing workbench, the telescopic end of the lower supporting electric telescopic rod vertically upwards and is fixedly connected with a supporting plate, the lower supporting electric telescopic rod is positioned under the upper piezoelectric telescopic rod, and the blank pressing workbench can be supported by the supporting plate, so that the blank pressing workbench is prevented from being damaged in the downward forging and pressing process of the upper piezoelectric telescopic rod.

As a preferable scheme of the invention, the pressing discharging device comprises a discharging electric telescopic rod fixedly connected to the top of the cold air box, the telescopic end of the discharging electric telescopic rod vertically downwards stretches into the inner cavity of the cold air box and is fixedly connected with a pressing scraping head, a notch is arranged in the middle of the lower surface of the pressing scraping head, two ends of the pressing scraping head are fixedly connected with extension pressing plates, the pressing of a forming die is ensured through the extension pressing plates, one side surface of the notch on the lower surface of the pressing scraping head is fixedly connected with a scraping plate, a water passing port is formed in the scraping plate, and the blank material of the die cavity defined by the ejector block can be pushed out and falls off by the scraping plate.

As a preferred scheme of the invention, the spraying device comprises a water pump placed in a water tank, the water pump is communicated and connected with a spraying head and an oblique spraying head through pipelines, the spraying head is fixedly connected to the top of a cold air box at the left side of the pressing discharging device, water sprayed by the spraying head can cool a blank pressing workbench conveyed into the cold air box to cool and solidify blanks, the oblique spraying head is fixedly connected to the top of the cold air box at the right side of the pressing discharging device and obliquely points to the pressing contact position of the pressing discharging device and the blank pressing workbench, and in the pressing process of the pressing discharging device to press a forming die, the oblique spraying head can directly spray water to the blank, and can clean the forming die while cooling the blanks.

As a preferable scheme of the invention, the water tank is divided into a water collecting cavity with an opening at the upper part and a water purifying cavity with a sealing cover at the upper part, the water collecting cavity and the water purifying cavity are divided by a filter screen, the water pump is positioned in the water purifying cavity, water sprayed from the spraying device finally flows into the collecting cavity, enters the water purifying cavity after being filtered by the filter screen, and then is pumped into the spraying device by the water pump for cooling.

The invention has the beneficial effects that: the invention designs a production device of the assembly line type polylactic acid blank, which can be used for processing polylactic acid powder serving as a raw material through the procedures of loading, hot melting and pressure filtration, forging, forming and cooling discharging to obtain the polylactic acid blank, wherein a chain conveying structure is adopted, and a blank pressing workbench is uniquely designed, so that the blank pressing workbench can easily turn around on the conveying device without being blocked, meanwhile, the conveying of the blank pressing workbench is more stable and accurate, a forming die is convenient to detach, different dies can be replaced according to requirements, the spring structure of the forming die is matched with a jacking block, the demoulding of the formed blank is facilitated, and the equipment structure and the working flow are simplified.

In addition, the designed filter pressing device can effectively press the unmelted matters in the polylactic acid in a molten state to the bottommost part, so that the later treatment is convenient, and the purity of the blank main body is ensured; the forging and pressing forming device can forge and press the blank, so that the prepared polylactic acid blank has better mechanical property; the baking oven, the hot air device, the cold air device and the spraying device which are integrally arranged can effectively complete the heating, melting, heat preservation and cooling forming work of the polylactic acid raw material, so that the forming of the polylactic acid raw material has a more controllable temperature environment, and meanwhile, the whole device can complete the cleaning and drying work of the blank pressing workbench, so that the blank pressing workbench can be recycled, and the whole device has higher production efficiency.

Drawings

FIG. 1 is a first view of a schematic overall structure of the present invention;

FIG. 2 is a second view of the overall construction of the present invention;

FIG. 3 is a cross-sectional view of the internal structure of the present invention;

FIG. 4 is a cross-sectional view of a collection drawer portion of the conveyor of the present invention;

FIG. 5 is a half cross-sectional view of the press platen of the present invention;

FIG. 6 is a schematic view of a molding die according to the present invention;

FIG. 7 is a schematic view of a press filtration apparatus according to the present invention;

FIG. 8 is a schematic view of a press head according to the present invention;

FIG. 9 is a schematic view of a pressing and discharging device according to the present invention

FIG. 10 is a schematic view of a spray device and a water tank according to the present invention

FIG. 11 is a schematic view of the structure of the collecting drawer of the present invention.

In the figure: 1 conveyor, 101 drive motor, 102 sprocket, 103 chain, 104 aggregate notch, 105 positioning chute, 2 blank pressing workbench, 201 front support bar, 202 rear support bar, 203 base, 204 chute, 205 proximity switch assembly, 206 forming die, 2061 die cavity, 2062 bevel chamfer, 2063 discharge chute, 2064 spring, 2065 threaded connection plate, 207 top block, 208 active cavity, 209 mounting cavity, 210 shrink cavity, 211 screw, 3 storage tank, 4 oven, 401 electrothermal tube, 5 cold bellows, 6 pressure filtration device, 601 pressure filtration electrical expansion link, 602 pressure filtration head, 603 seat, 604 steel needle, 605 limiting plate, 606 mounting hole, 7 forging forming device, 701 upper piezoelectric expansion link, 702 lower support electrical expansion link, 8 press discharge device, 801 discharge electrical expansion link, 802 press scraping head, 803 extending press plate, 804 scraping plate, 805 water gap, 9 hot air device, 10 cold air device, 11 device, 1101 water pump, 1102 spray head, 1103 oblique spray head, 12 water tank, 1201 collection, 1202 water purification cavity, 1203, 13 electrical control system, 14 drawer, 15 filter screen electrical drainage aperture, 15 filter screen proximity switch.

Detailed Description

Example 1

As shown in fig. 1 to 11, the equipment for preparing polylactic acid blanks adopts the technical scheme that the equipment adopts a conveying device 1 with a chain conveying structure, the conveying device 1 drives a chain wheel 102 to rotate through a driving motor 101, two chains 103 are arranged on the chain wheel 102 in a transmission fit manner, the chains 103 are positioned at two sides of the conveying device 1, positioning sliding grooves 105 are formed in equidistant positions of outer rings of the chains 103 on two sides of the conveying device 1, blank pressing working tables 2 are fixedly connected to the chains 103 at equal intervals, the blank pressing working tables 2 are slidably buckled in the positioning sliding grooves 105 and can circularly drive along with the chains 103, the conveying device 1 is divided into four stations from left to right, photoelectric proximity switches 15 are fixedly arranged at the top positions of the side walls of the conveying device 1 corresponding to each station, the four photoelectric proximity switches 15 are distributed at equal intervals, the four photoelectric proximity switches 15 are used for calibrating the stop positions of the blank pressing workbench 2 at four stations, so that the blank pressing workbench 2 is driven by a chain 103 to circularly move on the conveying device 1, the blank pressing workbench sequentially passes through four stations, namely a feeding station, a heating and melting station, a forging and pressing station and a discharging station, the processing of blanks is completed, a storage tank 3, a baking box 4 and a cold air box 5 are sequentially arranged above the conveying device 1 from left to right, the four stations are respectively corresponding to the four stations, an electromagnetic valve is arranged at a discharge hole of the storage tank 3, the baking box 4 is fixedly connected to the middle position below the conveying device 1, the upper baking box 4 and the lower baking box 4 are corresponding to each other, the discharged blank pressing workbench 2 can be dried by the baking box 4 and the two ends of the cold air box 5 are all communicated, and the blank pressing workbench 2 can pass through the storage tank 3. A filter pressing device 6 and a forging forming device 7 are fixedly arranged at the top of the baking box 4 above the conveying device 1.

The middle position of the top of the cold air box 5 is fixedly provided with a pressing discharging device 8, the storage tank 3, the filter pressing device 6, the forging forming device 7 and the pressing discharging device 8 are respectively in one-to-one correspondence with four photoelectric proximity switches 15, the baking box 4 above the conveying device 1 is divided into a heating area and a hot air heat preservation area from left to right, an electric heating tube 401 is arranged in the inner cavity of the heating area of the baking box 4, the filter pressing device 6 is positioned in the heating area of the baking box 4, the top of the hot air heat preservation area of the baking box 4 is connected with a hot air device 9 through pipeline communication, the forging forming device 7 is positioned in the hot air heat preservation area of the baking box 4, the hot air device 9 is simultaneously connected with the baking box 4 below the conveying device 1 through pipeline communication, the hot air device 9 generates hot air and blows into the baking box 4 through a pipeline, the tops of two ends of the cold air box 5 are connected with a cold air device 10 through pipeline communication, the cold air device 10 generates cold air through a cold air blower and blows the cold air into the cold air box 5 through a pipeline, the middle position of the top of the cold air box 5 is communicated and connected with a spray device 11 through a pipeline, a water outlet of the spray device 11 is positioned at the left side and the right side of a pressing discharging device 8, an aggregate notch 104 is formed in the middle of a conveying device 1 between a forging forming device 7 and the pressing discharging device 8, a collecting drawer 14 is placed in the aggregate notch 104 in a sliding fit manner, formed blanks fall into the collecting drawer 14 after being acted by the pressing discharging device 8 from a blank pressing workbench 2, a leak hole 1401 is formed in the bottom surface of the collecting drawer 14, water which is convenient to enter the drawer flows out, a water tank 12 is placed below the right end of the conveying device 1 corresponding to the spray device 11 and the collecting drawer 14, water sprayed by the spray device 11 finally flows into the water tank 12 and is reused by the spray device 11 after being filtered, the electromagnetic valve, the electric heating tube 401, the filter pressing device 6, the forging forming device 7, the pressing discharging device 8, the hot air device 9, the cold air device 10, the spraying device 11 and the photoelectric proximity switch 15 on the conveying device 1 and the storage tank 3 are respectively and electrically connected with the electric control system 13, and the whole device is controlled by the electric control system 13.

The blank pressing workbench 2 comprises a front supporting rod 201 and a rear supporting rod 202 which are fixedly connected on a chain 103 in parallel, wherein two ends of the front supporting rod 201 and the rear supporting rod 202 are in sliding buckling in a positioning chute 105, the upper surface of the front supporting rod 201 is fixedly connected with the front end of a base 203, a chute 204 is formed in the middle position of the upper surface of the rear end of the base 203, a blank is convenient to slide off and fall off the blank pressing workbench 2, a movable cavity 208 is formed in the lower part of the rear end, the rear supporting rod 202 penetrates through the movable cavity 208, the rear supporting rod 202 is not connected with the base 203, the supporting effect is achieved on the blank pressing workbench 2, the base 203 can move relative to the rear supporting rod 202 when the blank pressing workbench moves to the end of a conveying device 1, the blank pressing workbench 2 is prevented from being blocked and being unable to move at the end of the conveying device 1, a proximity switch assembly 205 is fixedly connected to one end of the upper surface of the front supporting rod 201, which is close to the photoelectric proximity switch 15, so that the movement stop position of the blank pressing workbench 2 can be calibrated, the center of the upper surface of the base 203 is provided with a mounting cavity 209, the bottom of the mounting cavity 209 is provided with a top block 207 in a threaded fit manner, the periphery of the mounting cavity 209 is provided with four shrinkage cavities 210 on the upper surface of the base 203, the shrinkage cavities 210 are fixedly connected with a forming die 206 through screws 211, the forming die 206 is slidably inserted into the mounting cavity 209, the forming die 206 is cross-shaped and is provided with a die cavity 2061 in the middle, the edge of the upper end opening of the die cavity 2061 is provided with a bevel chamfer 2062, so that feeding in the die cavity 2061 is facilitated, the press filter device 6 and the forging forming device 7 are also facilitated to extend into the die cavity 2061, the top block 207 is slidably inserted into the bottom of the die cavity 2061, one side of the upper surface of the forming die 206, which is close to the chute 204, is provided with a discharge chute 2063, so that an embryo coming out of the die cavity 2061 can slide from the discharge chute 2063, four springs 2064 are fixedly connected below the periphery of the forming die 206, the lower end of the spring 2064 is fixedly connected with a threaded connection plate 2065, the springs 2064 are arranged in the shrinkage cavity 210 in a one-to-one correspondence, the screws 211 are in threaded connection with the threaded connection plate 2065, and the forming die 206 and the top block 207 are convenient to detach, repair or replace different dies.

The filter pressing device 6 comprises a filter pressing electric telescopic rod 601 fixedly connected to the top of the baking box 4, the telescopic end of the filter pressing electric telescopic rod 601 vertically stretches into the inner cavity of the baking box 4 downwards and is fixedly connected with a filter pressing head 602, the shape of the filter pressing head 602 is identical to that of an opening of the mold cavity 2061, the filter pressing head 602 can be attached to the inner wall of the mold cavity 2061, the lower surface of the filter pressing head 602 is an arc surface with an upper surface being provided with a filter hole, so that the polylactic acid in a molten state can be subjected to filter pressing, undissolved particles in the polylactic acid are pressed to the bottommost part, the telescopic end of the filter pressing electric telescopic rod 601 slides through a dredging seat 603, a mounting hole 606 is formed in the dredging seat 603 and is fixedly arranged at the top of the inner cavity of the baking box 4 through a screw, steel needles 604 are fixedly connected to the middle position of the lower surface of the dredging seat 603, limit plates 605 are fixedly connected to the side edges of the filter pressing head 602, the steel needles 604 are in one-to-one correspondence with the filter pressing holes on the filter pressing head 602, the arc surface of the upper surface of the filter pressing head 602 is convenient to melt the polylactic acid after the head 602 is lifted, and the limit plates 605 guarantee that the polylactic acid in the molten state can flow and be separated, and the filter pressing head 602 can be stably lifted to the filter pressed into the filter pressing head 602.

The forging and pressing forming device 7 comprises an upper piezoelectric telescopic rod 701 and a lower supporting electric telescopic rod 702, wherein the upper piezoelectric telescopic rod 701 is fixedly connected to the top of the baking box 4 above the conveying device 1, the telescopic end of the upper piezoelectric telescopic rod is vertically and downwardly extended into the inner cavity of the baking box 4 and is fixedly connected with a pressing head, the pressing head is attached to the inner wall of the die cavity 2061 and enters the die cavity 2061, polylactic acid in the pressing head can be forged and pressed, the lower supporting electric telescopic rod 702 is fixedly connected to the middle of the conveying device 1 and is located below the blank pressing workbench 2, the telescopic end of the lower supporting electric telescopic rod 702 is vertically and upwardly connected with a supporting plate, the lower supporting electric telescopic rod 702 is located under the upper piezoelectric telescopic rod 701, the blank pressing workbench 2 can be supported by the supporting plate, and damage to the blank pressing workbench 2 in the downward forging and pressing process of the upper piezoelectric telescopic rod 701 is avoided.

The pressing discharging device 8 comprises a discharging electric telescopic rod 801 fixedly connected to the top of the cold air box 5, a telescopic end of the discharging electric telescopic rod 801 vertically downwards stretches into an inner cavity of the cold air box 5 and is fixedly connected with a pressing scraping head 802, a notch is formed in the middle of the lower surface of the pressing scraping head 802, two ends of the pressing head are fixedly connected with extending pressing plates 803, pressing of the forming die 206 is guaranteed through the extending pressing plates 803, a scraper 804 is fixedly connected to one side face of the notch of the lower surface of the pressing scraping head 802, a water passing port 805 is formed in the scraper 804, and the blank which is fixed by the jacking block 207 and is positioned in the die cavity 2061 can be pushed out to fall by the scraper 804.

The water tank 12 is divided into a water collecting cavity 1201 with an opening at the upper part and a water purifying cavity 1202 with a sealing cover at the upper part, the water collecting cavity 1201 is divided from the water purifying cavity 1202 through a filter screen 1203, the spray device 11 comprises a water pump 1101 placed in the water purifying cavity 1202, the water pump 1101 is connected with a spray header 1102 and an oblique jet head 1103 through a pipeline, the spray header 1102 is fixedly connected to the top of a cold air box 5 at the left side of a pressing discharging device 8, the spray header 1102 sprays water to cool a blank pressing workbench 2 conveyed into the cold air box 5, so that blanks are cooled and solidified, the oblique jet head 1103 is fixedly connected to the top of the cold air box 5 at the right side of the pressing discharging device 8 and is obliquely directed to the pressing contact position of the pressing discharging device 8 and the blank pressing workbench 2, and in the pressing discharging device 8 presses a forming die 206, the oblique jet head 1103 can directly jet water to the blank, and the forming die 206 can be cleaned while cooling the blank. The water sprayed from the spraying device 11 finally flows into the collecting cavity 1201, is filtered by the filter screen 1203, enters the water purifying cavity 1202, and is pumped into the spraying device 11 by the water pump 1101 for cooling.

The working principle of the invention is as follows: polylactic acid powder is stored in the storage tank 3, the switch of an electromagnetic valve on the storage tank 3 is controlled through the electric control system 13, the storage tank 3 is controlled to release the powder, the conveying device 1 drives the blank pressing workbench 2 to move below the storage tank 3, the position of the blank pressing workbench 2 is determined through the cooperation of the photoelectric proximity switch 15 and the proximity switch assembly 205, the forming die 206 is higher than the base 203 under normal state, the top block 207 is positioned at the bottom of the die cavity 2061, so that the powder can be filled into the die cavity 2061, then the conveying device 1 drives the blank pressing workbench 2 to move into the baking box 4 and stop below the filter pressing device 6, the powder is melted through the heating of the electric heating tube 401, then the press-filtering head 602 is pushed by the press-filtering electric telescopic rod 601 to downwards enter the die cavity 2061 and slowly press the melted polylactic acid, unmelted impurities in the blank pressing workbench are pressed to the bottommost part, and the melted polylactic acid can pass through the holes of the press-filtering head 602, the arc surface of the upper surface ensures that polylactic acid can flow downwards to separate from the filter pressing head 602 in the lifting process, the filter pressing head 602 can be lifted under the limit of the limiting plate 605 after being lifted out of the die cavity 2061, so that the steel needle 604 can be correspondingly inserted into a hole of the filter pressing head 602, the filter pressing head 602 is dredged and cleaned, the polylactic acid is conveyed to the lower part of the forging and pressing forming device 7 by the conveying device 1 after being melted and filtered, the lower supporting electric telescopic rod 702 is stretched to be propped against the bottom of the forging and pressing workbench 2, then the upper piezoelectric telescopic rod 701 is stretched to enter the die cavity 2061 to forge the polylactic acid, the temperature of a hot air heat preservation area of the baking oven 4 is controlled by controlling the blast temperature of the hot air device 9 in the process, the polylactic acid is convenient to forge and the upper piezoelectric telescopic rod 701 and the lower supporting electric telescopic rod 702 are contracted after the forging is finished, then the blank pressing workbench 2 moves into the air cooling box 5 again, cold air blown out by the cold air device 10 and water sprayed by the spraying device 11 cool the blank pressing workbench 2 and the blank, then the blank pressing workbench 2 stays right below the pressing discharging device 8, the pressing scraping head 802 is stretched by the discharging electric telescopic rod 801 to be pressed to the upper surface of the forming die 206, the forming die 206 is pressed downwards, the ejector 207 ejects the cooled blank out of the die cavity 2061, then the conveying device 1 drives the blank pressing workbench 2 to move, the pressing of the forming die 206 is ensured by extending the pressing plate 803, the blank is scraped from the top of the forming die 206 by the scraping plate 804, slides along the discharging chute 2063 and slides into the collecting drawer 14 below after passing through the chute 204, the oblique ejection head 1103 is obliquely arranged, the water can be directly sprayed to the blank through the water port 8005, the forming die 206 can be cleaned while the blank is cooled, the sprayed water flows downwards and finally flows back into the water tank 12, the water pump 1202 is filtered, and the blank is filtered into the filter screen 1101, and enters the filter screen 1101 and the filter screen 1101, and the filter screen is cooled by the water pump 1202. The discharged blank pressing workbench 2 is continuously conveyed by the conveying device 1, the forming die 206 is restored to the original position under the action of the springs 2064 after being separated from the extending pressing plate 803, the blank pressing workbench 2 moves to the lower side of the conveying device 1, is dried by the baking box 4 below and returns to the lower side of the storage tank 3 again, and the blank making is continuously carried out. The embryo collected in the collection drawer 14 is taken out and then simply treated, and the part containing impurities at the lower end is removed.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention, and furthermore, the terms "first", "second", etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implying a number of the indicated technical features, whereby the features defining "first", "second", etc. may explicitly or implicitly include one or more of such features.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or by communication between two elements, the specific meaning of the terms in the present disclosure will be understood by those skilled in the art in view of the specific circumstances.

The components and circuit connections not described in detail herein are prior art.

Although the specific embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes and modifications without inventive labor may be made within the scope of the present invention without departing from the spirit of the present invention, which is within the scope of the present invention.

Claims

1. An apparatus for preparing polylactic acid embryo material, characterized in that: the automatic baking machine comprises a conveying device (1), wherein the conveying device (1) is of a chain conveying structure, a chain wheel (102) is driven to rotate through a driving motor (101), two chains (103) are installed on the chain wheel (102) in a transmission fit mode, the chains (103) are located on two sides of the conveying device (1), positioning sliding grooves (105) are formed in equidistant positions of outer rings of the chains (103) on two sides of the conveying device (1), blank pressing working tables (2) are fixedly connected to the chains (103) at equal intervals, the blank pressing working tables (2) are clamped in the positioning sliding grooves (105) in a sliding mode and can be in circulation transmission along with the chains (103), the conveying device (1) is divided into four stations from left to right, photoelectric proximity switches (15) are fixedly installed at the top positions of the side walls of the conveying device (1) corresponding to each station, storage tanks (3), baking boxes (4) and baking boxes (5) are sequentially installed above the conveying device (1) from left to right at equal intervals, the two ends of the baking boxes (4) are fixedly connected with the two baking boxes (4), the utility model discloses a hot air oven, including a conveying device (1), a baking box (4), a cold air box (4), a hot air device (9), a hot air device (7), a spray device (10) and a cold air device (10) are arranged in the inner cavity of the heating area of the baking box (4), wherein the top of the baking box (4) above the conveying device (1) is fixedly provided with a filter pressing device (6) and a forging and pressing forming device (7), the middle position of the top of the cold air box (5) is fixedly provided with a pressing discharging device (8), the storage tank (3) the filter pressing device (6), the forging and pressing forming device (7) and the pressing discharging device (8) are respectively in one-to-one correspondence with four photoelectric proximity switches (15), the baking box (4) above the conveying device (1) is left and right divided into a heating area and a hot air heat insulating area, the electric heating tube (401) is arranged in the inner cavity of the heating area of the baking box (4), the filter pressing device (6) is located in the heating area of the baking box (4), the top of the hot air heat insulating area of the baking box (4) is connected with the hot air device (9) through pipeline communication, the hot air device (7) is located in the hot air heat insulating area of the baking box (4) through the hot air heat insulating area of the baking box (9), the cold air device (4) is simultaneously connected with the hot air device (9) through pipeline communication, the cold air device (4) through the cold air device (4) and the cold air device (4) through the cold air pipeline communication, and the cold air device (5, the water outlet of the spraying device (11) is positioned at the left side and the right side of the pressing discharging device (8), a collecting notch (104) is formed in the middle of the conveying device (1) between the pressing forming device (7) and the pressing discharging device (8), a collecting drawer (14) is placed in the collecting notch (104) in a sliding fit manner, a leak hole (1401) is formed in the bottom surface of the collecting drawer (14), a water tank (12) is placed below the right end of the conveying device (1) corresponding to the spraying device (11) and the collecting drawer (14), an electromagnetic valve, an electric heating tube (401), a filter pressing device (6), the pressing forming device (7), the pressing discharging device (8), a hot air device (9), a cold air device (10), the spraying device (11) and a photoelectric proximity switch (15) are respectively and electrically connected with an electric control system (13), the filter pressing device (6) comprises a filter pressing telescopic rod (601) fixedly connected to the top of the oven (4), the vertical end of the filter pressing telescopic rod (11) extends downwards to the inner cavity (4) and is provided with a circular filter pressing upper surface 602 which is fixedly connected with the upper surface of the filter pressing head (602, the flexible end of filter-pressing electricity telescopic link (601) slides and passes mediation seat (603), set up mounting hole (606) and pass through screw fixed mounting on mediation seat (603) be in oven (4) inner chamber top, mediation seat (603) lower surface intermediate position fixedly connected with steel needle (604), side fixedly connected with limiting plate (605), steel needle (604) with the filtration hole one-to-one on filter-pressing head (602), filter-pressing head (602) slip buckle is in between limiting plate (605).

2. The apparatus for producing a polylactic acid blank according to claim 1, wherein: blank pressing workstation (2) are in including the fixed connection that is parallel to each other preceding bracing piece (201) and back bracing piece (202) on chain (103), preceding bracing piece (201) with back bracing piece (202) both ends slip buckle is in location spout (105), surface fixed connection is in base (203) front end on preceding bracing piece (201), chute (204) have been seted up in base (203) rear end upper surface intermediate position, movable cavity (208) have been seted up to the rear end lower part, back bracing piece (202) pass movable cavity (208), preceding bracing piece (201) upper surface is close to one end fixedly connected with proximity switch subassembly (205) of photoelectric proximity switch (15), install chamber (209) have been seted up in base (203) upper surface central point put, install kicking block (207) bottom through the screw cooperation, install four shrink chambeies (210) have all around on base (203) upper surface, through screw (211) fixed connection in shrink chamber (210) has shaping mould (206), install in sliding mould (207) in the shaping mould (206).

3. The apparatus for producing a polylactic acid blank according to claim 2, wherein: the forming die (206) is crisscross and has offered die cavity (2061) in the middle, inclined plane chamfer (2062) has been seted up at die cavity (2061) upper end opening edge, kicking block (207) slip grafting is in die cavity (2061) bottom, forming die (206) upper surface is close to ejection of compact spout (2063) have been seted up to one side of chute (204), forming die (206) below all around fixedly connected with four springs (2064), spring (2064) lower extreme fixedly connected with screw connection board (2065), spring (2064) one-to-one is installed in shrink chamber (210), screw (211) threaded connection is in on screw connection board (2065).

4. An apparatus for producing a polylactic acid blank according to claim 3, wherein: the shape of the filter pressing head (602) is the same as the shape of the opening of the die cavity (2061).

5. The apparatus for producing a polylactic acid blank according to claim 1, wherein: forging and pressing forming device (7) are including last piezoelectricity telescopic link (701) and lower support electric telescopic link (702), go up piezoelectricity telescopic link (701) fixed connection be in toast case (4) top and its flexible end top of conveyer (1) top and its vertical downwardly extending into toast case (4) inner chamber and fixedly connected with pressure head, lower support electric telescopic link (702) fixed connection is in conveyer (1) middle part and be located blank pressing workstation (2) below, the flexible end of lower support electric telescopic link (702) is vertical up and fixedly connected with backup pad, lower support electric telescopic link (702) are located go up under piezoelectricity telescopic link (701).

6. The apparatus for producing a polylactic acid blank according to claim 1, wherein: the pressing discharging device (8) comprises a discharging electric telescopic rod (801) fixedly connected to the top of the Leng Fengxiang (5), the telescopic end of the discharging electric telescopic rod (801) vertically downwards stretches into the inner cavity of the cold air box (5) and is fixedly connected with a pressing scraping head (802), a notch is formed in the middle of the lower surface of the pressing scraping head (802), two ends of the pressing scraping head are fixedly connected with extension pressing plates (803), a scraper (804) is fixedly connected to one side face of the notch of the lower surface of the pressing scraping head (802), and a water passing port (805) is formed in the scraper (804).

7. The apparatus for producing a polylactic acid blank according to claim 1, wherein: the spraying device (11) comprises a water pump (1101) placed in the water tank (12), the water pump (1101) is connected with a spraying head (1102) and an oblique spraying head (1103) through pipeline communication, the spraying head (1102) is fixedly connected to the top of the cold air box (5) on the left side of the pressing discharging device (8), and the oblique spraying head (1103) is fixedly connected to the top of the cold air box (5) on the right side of the pressing discharging device (8) and obliquely points to the pressing discharging device (8) and the pressing embryo workbench (2) to press the contact position.

8. The apparatus for producing a polylactic acid blank according to claim 7, wherein: the water tank (12) is divided into a water collecting cavity (1201) with an opening at the upper part and a water purifying cavity (1202) with a sealing cover at the upper part, the water collecting cavity (1201) and the water purifying cavity (1202) are divided by a filter screen (1203), and the water pump (1101) is positioned in the water purifying cavity (1202).