CN112917796B

CN112917796B - Starch-free polyvinyl alcohol collodion foam foaming process and intelligent production equipment

Info

Publication number: CN112917796B
Application number: CN202011593456.5A
Authority: CN
Inventors: 何卫东; 陈苏婷; 刘耀东
Original assignee: Suqian Jiahe Plastic Metal Products Co ltd
Current assignee: Suqian Jiahe Plastic Metal Products Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-24
Anticipated expiration: 2040-12-29
Also published as: CN112917796A

Abstract

The invention discloses a starch-free polyvinyl alcohol collodion foaming process and intelligent production equipment, and particularly relates to the field of polyvinyl alcohol collodion foaming processes, wherein the starch-free polyvinyl alcohol collodion foaming process comprises the following specific processing steps: the material pre-processing, air supply and pressurization, stamping and mixing, extrusion and injection molding and forming comprise a stamping foaming machine, wherein one side of the stamping foaming machine is provided with CO₂Storage tank of said CO₂And a gas guide pipe is fixedly arranged between the storage tank and the stamping foaming machine. According to the invention, the CO is supplemented into the box shell by the operation of the booster pump through the addition of the stamping foaming machine₂Gas pressurization, electromagnet sucker are impacted to melting material in the inner cavity of the case shell by the power supply and power off process of the subsequent PLC control generation intermittent type, the traditional slurry centrifugal stirring mode is replaced to mix the material, and the high-speed impact force in the period can dissolve CO₂The melted materials of the gas are knocked and integrated, so that the CO is prevented from being dissolved in partial materials₂The gas quantity is obviously higher than other parts, and the subsequent finished product uniformity is ensured.

Description

Starch-free polyvinyl alcohol collodion foam foaming process and intelligent production equipment

Technical Field

The invention relates to the technical field of polyvinyl alcohol collodion foaming processes, in particular to a starch-free polyvinyl alcohol collodion foaming process and intelligent production equipment.

Background

The polymer material is a milestone for human progress, changes the tradition that human life depends on natural entitlements for thousands of millions of years, and realizes the manufacture of various artificial substances with different structures and properties according to the requirement of human will. At present, high polymer materials, such as cement, steel and wood, form four major basic raw materials of modern society and permeate into various fields of social life. Plastics, one of the polymer materials, is prepared by processing and molding a resin as a base with additives such as plasticizers and fillers. Plastics are widely available, currently in the order of 300, and are generally classified into thermosetting and thermoplastic plastics according to their thermal behavior, and general-purpose and engineering plastics according to their uses. With the development of science and technology, plastics are widely applied to the fields of agriculture, buildings, automobiles, military industry, food packaging and the like due to the characteristics of light weight, high specific strength, good insulativity, excellent chemical stability, easiness in molding and processing and the like, and the range of the plastics used as functional materials and structural materials is more and more extensive.

For plastics, it is petroleum as the raw material. Petroleum is a scarce energy source, is a life line of modern economy, and the consumption of petroleum is reduced as much as possible. The plastic can greatly save the raw material consumption after foaming, and can improve the physical and mechanical properties of the material on the basis of reducing the cost. Accordingly, a foamed plastic having characteristics such as weight reduction, heat insulation, sound insulation, and cushioning properties has been produced. The foam plastic contains a large amount of gas, and due to the structural difference, the foam plastic has the common characteristics of plastics, has excellent acoustic performance, thermal performance and electrical performance, and can be used as special materials for sound absorption, shock resistance, heat insulation, heat preservation, floating and the like; the existing preparation process and preparation device are various, so as to ensure the uniformity of the prepared high polymer material, take the foaming of polyvinyl alcohol collodion as an example, in the actual preparation process, a stirring device is often needed to be adopted to ensure the mixing uniformity of raw materials, but in the actual production process, the fluid material can generate centrifugal force due to the stirring device, so that part of the material is suspended at the top of the material in a centrifugal state, the uniform stirring effect cannot be obtained, the problem of uneven distribution of bubbles in the prepared part of the product in the finished product of the collodion is solved, and the foaming quality of the collodion is influenced.

The existing industrial production of polyvinyl alcohol collodion adopts a starch process for preparation, the starch mainly plays a role of a pore-forming agent in a foaming process, and the concrete flow is as follows: firstly, polyvinyl alcohol powder and water are mixed according to a certain proportion and added into a melting furnace with a stirring device, the stirring device is started, the temperature of the system is raised to 90-95 ℃, and the system is maintained for 2 hours to ensure that the polyvinyl alcohol is fully dissolved. And then putting the polyvinyl alcohol solution dissolved in the melting furnace into an acid-resistant stirring reaction kettle for cooling, cooling to the temperature required by the process, sequentially adding weighed starch, hydrochloric acid and formaldehyde, stirring for 2min, immediately injecting into a mold, finally placing the mold into an oven under the set temperature condition for curing and molding for a period of time, taking out the collodion cotton from the oven after the collodion cotton is completely molded, cooling to room temperature, pulling out from the mold, washing away residual starch, hydrochloric acid and formaldehyde, and cutting and packaging according to the size requirements of different products. And a large amount of water is consumed in the cleaning process of the starch, and the starch is discharged along with the water, so that the COD content of the water body is high, and the environment is polluted. In addition, the starch filled in the collodion is difficult to completely clean, and the residual starch can generate mould so as to cause black spots on the surface of the collodion, thereby seriously affecting the quality of the product and limiting the application range of the collodion product.

Based on the above, the invention provides a starch-free polyvinyl alcohol collodion foam foaming process and intelligent production equipment, so as to at least solve the technical problems in the prior art.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a starch-free polyvinyl alcohol collodion foam foaming process and intelligent production equipment, and the technical problems to be solved by the invention are as follows: how to solve the problem that the quality of the collodion is influenced by the uneven distribution of bubbles in the existing collodion foaming technology and the starch only serves as a pore-forming agent in the production process of the process and is finally and completely washed away, thereby causing resource waste. And a large amount of water is consumed in the cleaning process of the starch, and the starch is discharged along with the water, so that the problems of high COD content in the water body and environmental pollution are caused.

In order to achieve the purpose, the invention provides the following technical scheme: a starch-free polyvinyl alcohol collodion foam process comprises the following specific processing steps:

s1, preprocessing raw materials: putting a polyvinyl alcohol raw material into a reaction device, blowing protective gas into the reaction device to remove air, then sealing the reaction device, and heating to 150-;

s2, air supplementing and pressurizing: continuously supplementing protective gas into the reaction device at the speed of 300-400mL/min to ensure that the air pressure value in the reaction device reaches 1.8 multiplied by 105Pa-2 multiplied by 106Pa to obtain polyvinyl alcohol melt in which the protective gas is dissolved;

s3, pressing and mixing: keeping the heating temperature in the step S1, and performing stamping and mixing on the material by adopting a stamping mode, wherein the stamping frequency is set to be 5-8S/time, and the mixing time duration is set to be 15-20min, so as to obtain a pre-foaming body;

s4, extruding and injection molding: after the mixing in the step S3 is completed, pressing the mixed prefoamed body into an extruder under the action of air pressure, and extruding the prefoamed body into a mold by the operation of the extruder to obtain a foamed molded body;

s5, forming material: and (4) performing foaming curing and demolding on the injection mold in the step S4 and the foaming molded body inside to obtain a finished product.

In a preferred embodiment, the protective gas in steps S1 and S2 is CO2, which is colorless, non-toxic, inexpensive, easily accessible in critical state, strong in raw material force, and has the function of a plasticizer.

In a preferred embodiment, the step S4 of foaming and curing is set to be microwave heating at the temperature of 180-220 ℃ for 5-8min, which can effectively accelerate the precipitation speed of the dissolved CO2 gas.

The invention also comprises intelligent production equipment for foaming the starch-free polyvinyl alcohol collodion, which comprises a stamping foaming machine, wherein one side of the stamping foaming machine is provided with a CO2 storage tank, an air entraining pipe is fixedly arranged between the CO2 storage tank and the stamping foaming machine, the air entraining pipe is provided with a booster pump, the output end and the input end of the booster pump are both connected with the air entraining pipe, the booster pump is fixedly connected with the outer wall of the stamping foaming machine, the air entraining pipe is also fixedly provided with an electronic barometer, one side of the stamping foaming machine, which is far away from the CO2 storage tank, is provided with an extrusion forming machine, the extrusion forming machine and the stamping foaming machine are provided with a feeding pipe, and a discharge port of the extrusion forming machine is provided with a forming die;

the stamping foaming machine comprises a box shell, wherein an electromagnet sucker is fixedly arranged on the top wall of an inner cavity of the box shell, a material supplementing component is fixedly arranged at the top end of the box shell, an electric heating plate is fixedly arranged on the inner wall of the box shell, a connecting rod is fixedly arranged at the bottom end of the electromagnet sucker and the central point of the bottom wall of the inner cavity of the box shell, a stamping part is sleeved outside the connecting rod, a reset elastic part is detachably and movably arranged between the stamping part and the bottom wall of the inner cavity of the box shell, and a PLC (programmable logic controller) is fixedly arranged on the outer wall of the box shell;

the stamping part comprises an iron stamping disc, a through groove is formed in the joint of the center of the iron stamping disc and the connecting rod, a plurality of balls are uniformly arranged on the inner wall of the through groove, and a plurality of fixing rings are uniformly and fixedly arranged on the bottom wall of the iron stamping disc and the bottom wall of the inner cavity of the box shell;

the reset elastic piece comprises a spring main body, hooks are fixedly arranged at two ends of the spring main body, and the hooks at two ends of the spring main body are respectively hooked with the fixed rings at the bottom wall of the iron punching plate and the bottom wall of the inner cavity of the box shell;

electromagnet chuck, electric heating board, booster pump, electron barometer and extrusion moulding machine all with PLC controller electric connection, and the work interval of setting electromagnet chuck in the PLC controller is long.

In a preferred embodiment, the bottom of the outer wall of the box shell is provided with an access hole, a door plate is arranged at the access hole, a hinge and a door lock are arranged between the door plate and the access hole, and the elastic element can be conveniently replaced by overhauling and resetting through the access hole.

In a preferred embodiment, the feed supplement part includes the feeder hopper, the feeder hopper bottom with case shell fixed connection and with the case shell inner chamber continuous, the feeder hopper top is equipped with sealed lid, be equipped with sealed the pad between sealed lid and the feeder hopper, guarantee the gas tightness of the mixed in-process punching press foaming machine of punching press.

In a preferred embodiment, the inner wall of the sealing cover and the outer wall of the top end of the feed hopper are both provided with threads, the feed hopper is in threaded connection with the sealing cover, and the sealing gasket is made of rubber materials.

In a preferred embodiment, the extrusion molding machine comprises a shell, an extrusion screw, a transmission motor, a feeding port and a discharging port, wherein one end of the air-entraining pipe and one end of the feeding pipe penetrate through the shell to be connected with the inner cavity of the shell, the other end of the feeding pipe is arranged at the position of the feeding port, and the feeding pipe is further provided with a manual control valve.

The invention has the technical effects and advantages that:

1. according to the invention, through the addition of the punching foaming machine, the booster pump works to supplement CO2 gas into the box shell for pressurization, the electromagnet sucker is controlled by the subsequent PLC to generate an intermittent power supply and outage process, the impact is carried out on the melted materials in the inner cavity of the box shell, the traditional slurry centrifugal stirring mode is replaced to mix the materials, and the high-speed impact force during the process can be used for knocking and integrating the melted materials with dissolved CO2 gas, so that the condition that the gas quantity of partial materials dissolved CO2 is obviously higher than that of other parts is avoided, and the subsequent finished product uniformity is ensured;

2. according to the invention, through the matching use of the CO2 storage tank and the booster pump, when the materials are melted, the CO2 gas can be quickly melted into the materials under high pressure, and substances such as traditional foaming agents are not required to be additionally added, so that the reaction time is shortened, the working procedures are reduced, and the starch-free polyvinyl alcohol foamed collodion with better performance is obtained.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is an enlarged view of the portion A of FIG. 1 according to the present invention.

Fig. 3 is a schematic structural view of a punching foaming machine of the present invention.

FIG. 4 is a schematic diagram of the feeding part structure of the present invention.

Fig. 5 is a schematic structural diagram of a stamping part according to the invention.

Fig. 6 is a schematic structural view of the elastic restoring member according to the present invention.

Fig. 7 is a schematic diagram of a module structure according to the present invention.

The reference signs are: 1 stamping foaming machine, 11 box shells, 12 electromagnet suckers, 13 material supplementing components, 131 feed hoppers, 132 sealing covers, 133 sealing gaskets, 14 electric heating plates, 15 connecting rods, 16 stamping parts, 161 iron stamping discs, 162 through grooves, 163 balls, 164 fixing rings, 17 reset elastic parts, 171 spring bodies, 172 hooks, 18 PLC controllers, 19 door plates, 2 CO2 storage tanks, 3 air guide pipes, 4 booster pumps, 5 electronic gas pressure meters, 6 extrusion molding machines, 7 feeding pipes and 8 molding dies.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to the attached drawings 1-7, the invention provides intelligent production equipment for foaming starch-free polyvinyl alcohol collodion, which comprises a stamping foaming machine 1, wherein a CO2 storage tank 2 is arranged on one side of the stamping foaming machine 1, an air entraining pipe 3 is fixedly arranged between the CO2 storage tank 2 and the stamping foaming machine 1, a booster pump 4 is arranged on the air entraining pipe 3, the output end and the input end of the booster pump 4 are both connected with the air entraining pipe 3, the booster pump 4 is fixedly connected with the outer wall of the stamping foaming machine 1, an electronic barometer 5 is also fixedly arranged on the air entraining pipe 3, an extrusion molding machine 6 is arranged on one side of the stamping foaming machine 1, which is far away from the CO2 storage tank 2, a feeding pipe 7 is arranged between the extrusion molding machine 6 and the stamping foaming machine 1, and a molding die 8 is arranged at the discharge;

the stamping foaming machine 1 comprises a box shell 11, an electromagnet sucker 12 is fixedly arranged on the top wall of an inner cavity of the box shell 11, a material supplementing part 13 is fixedly arranged at the top end of the box shell 11, an electric heating plate 14 is fixedly arranged on the inner wall of the box shell 11, a connecting rod 15 is fixedly arranged at the bottom end of the electromagnet sucker 12 and the central point of the bottom wall of the inner cavity of the box shell 11, a stamping part 16 is sleeved outside the connecting rod 15, a reset elastic part 17 is detachably and movably arranged between the stamping part 16 and the bottom wall of the inner cavity of the box shell 11, and a PLC 18 is fixedly arranged on the outer wall of the box shell 11;

the stamping part 16 comprises an iron stamping plate 161, a through groove 162 is formed in the joint of the center of the iron stamping plate 161 and the connecting rod 15, a plurality of balls 163 are uniformly arranged on the inner wall of the through groove 162, and a plurality of fixing rings 164 are uniformly and fixedly arranged on the bottom wall of the iron stamping plate 161 and the bottom wall of the inner cavity of the box shell 11;

the reset elastic part 17 comprises a spring main body 171, hooks 172 are fixedly arranged at both ends of the spring main body 171, and the hooks 172 at both ends of the spring main body are respectively hooked with the fixing rings 164 at the bottom wall of the iron punching plate 161 and the bottom wall of the inner cavity of the box shell 11;

the electromagnet suction cup 12, the electric heating plate 14, the booster pump 4, the electronic barometer 5 and the extrusion molding machine 6 are all electrically connected with the PLC 18, and the working interval duration of the electromagnet suction cup 12 is set in the PLC 18.

An access hole is arranged at the bottom of the outer wall of the box shell 11, a door panel 19 is arranged at the access hole, a hinge and a door lock are arranged between the door panel 19 and the access hole, the material supplementing part 13 comprises a feed hopper 131, the bottom end of the feed hopper 131 is fixedly connected with the case shell 11 and is connected with the inner cavity of the case shell 11, the top of the feed hopper 131 is provided with a sealing cover 132, a sealing gasket 133 is arranged between the sealing cover 132 and the feed hopper 131, threads are arranged on the inner wall of the sealing cover 132 and the outer wall of the top end of the feed hopper 131, the feed hopper 131 is screw-coupled with a sealing cap 132, a packing 133 is made of a rubber material, the extrusion molding machine 6 comprises a shell, an extrusion screw, a transmission motor, a feeding hole and a discharging hole, one end of the air-entraining pipe 3 and one end of the feeding pipe 7 are both connected with the inner cavity of the box shell 11 by penetrating through the box shell 11, the other end of the feeding pipe 7 is arranged at the position of the feeding hole, and the feeding pipe 7 is also provided with a manual control valve.

Example 1:

a starch-free polyvinyl alcohol collodion foam process comprises the following specific processing steps:

s1, preprocessing raw materials: putting a polyvinyl alcohol raw material into a reaction device, blowing CO2 gas into the reaction device to remove air, sealing the reaction device, and heating to 150-;

s2, air supplementing and pressurizing: continuously supplementing CO2 gas into the reaction device at a speed of 350mL/min to enable the air pressure value in the reaction device to reach 1.9 multiplied by 105 Pa;

s3, extruding and injection molding: putting the material obtained in the step S2 into an extruder, and extruding the pre-foaming body into a die by the extruder;

s4, forming material: and (4) foaming and curing the injection mold in the step S3 (under the condition of microwave heating at the temperature of 190 ℃ for 5-8 min), and demolding to obtain a finished product.

Example 2:

s3, pressing and mixing: keeping the heating temperature in the step S1, and performing stamping and mixing on the materials by adopting a stamping mode, wherein the stamping frequency is set to be 5-8S/time, and the mixing time duration is set to be 15-20 min;

s4, extruding and injection molding: after the mixing in the step S3 is finished, pressing the mixed pre-foaming body into an extruder under the action of air pressure, and extruding the pre-foaming body into a mold by the extruder;

s5, forming material: and (4) foaming and curing the injection mold in the step S4 (under the condition of microwave heating at the temperature of 190 ℃ for 5-8 min), and demolding to obtain a finished product.

Example 3:

s2, pressing and mixing: keeping the heating temperature in the step S1, and performing stamping and mixing on the materials by adopting a stamping mode, wherein the stamping frequency is set to be 5-8S/time, and the mixing time duration is set to be 15-20 min;

s3, extruding and injection molding: after the mixing in the step S2 is finished, pressing the mixed pre-foaming body into an extruder under the action of air pressure, and extruding the pre-foaming body into a mold by the extruder;

Example 4:

the finished foam rubbers obtained in examples 1 to 3 and the foam rubbers obtained in the prior art were used as comparative examples to perform laboratory sample amplification experimental observation, and the following data were obtained:

as can be seen from the above table, the preparation method in example 2 is the most appropriate, the average density of the foamed collodion prepared by the method is small, the relative pore size of the bubbles is large, the tensile strength of the prepared foamed collodion finished product reaches above 0.4MPa, the foam penetrates through the product in an amplification experiment, the bubbles in the finished product are uniformly distributed, the open pore ratio of the bubbles is above 95%, and the foamed collodion with uniform bubbles can be well obtained.

The working principle of the invention is as follows:

taking the method in the embodiment 2 as an example, referring to the attached drawings 1-7 of the specification, opening a sealing cover, putting a polyvinyl alcohol raw material into an inner cavity of a box shell 11 through a feed hopper 131, then operating a booster pump 4 to fill CO2 gas in a CO2 storage tank 2 into the inner cavity of the box shell 11 through an air introducing pipe 3, exhausting air in the inner cavity of the box shell 11 from the feed hopper 131 to the box shell 11 because the CO2 gas is relatively heavy, then installing a sealing cover 132, ensuring the sealing performance of the connection part of the feed hopper 131 and the sealing cover 132 through a sealing gasket 133, and then controlling the operation of an electric heating plate 14 by a PLC (programmable logic controller) 18 to heat and melt the raw material at the temperature of 150-; the booster pump 4 continues to supplement CO2 gas into the box shell 11 when working, so that the pressure value in the box shell 11 is increased and fully fused, part of high-pressure CO2 is dissolved in the melted raw material under a high pressure state, then the PLC 18 issues an instruction to the electromagnet sucker 12 in a programming mode, and through digital or analog input and output, the electromagnet sucker 12 is controlled to generate an intermittent power supply and power off process, the electromagnet sucker 12 is electrified to adsorb the iron punching plate 161 during the process, the iron punching plate 161 is lifted along the height of the connecting rod 15 to drive the length of the spring main body 171 to extend, after the electromagnet sucker 12 is powered off, the electromagnet sucker falls back quickly under the resilience of the spring main body 171 and the self gravity of the iron punching plate 161 to impact the melted material in the inner cavity of the box shell 11, if reciprocating, the traditional slurry centrifugal stirring mode is replaced to mix the material, and high-speed impact force is generated during the process, the method can integrate the molten material dissolved with CO2 gas by knocking, and avoid the problem that the gas quantity of partial material dissolved with CO2 gas is obviously higher than that of other parts, which affects the subsequent uniformity of finished products, after the impact process is finished, a manual control valve on a feeding pipe 7 is opened, the molten pre-foaming body material which is uniformly punched is extruded into an extrusion forming machine 6 through the feeding pipe 7 under the action of high air pressure, then the pre-foaming body is extruded into a forming die 8 by the work of the extrusion forming machine 6, and then the finished product is obtained after foaming curing and demoulding, and after the pre-foaming body material is separated from the high-pressure environment of the stamping foaming machine 1, the dissolved high-pressure CO2 gas is separated out, so that bubbles are formed.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. A starch-free polyvinyl alcohol collodion foam foaming process is characterized in that: the specific processing steps are as follows: s1, preprocessing raw materials: putting a polyvinyl alcohol raw material into a reaction device, blowing protective gas into the reaction device to remove air, then sealing the reaction device, and heating to 150-; s2, air supplementing and pressurizing: continuously supplementing protective gas into the reaction device at the speed of 300-400mL/min to ensure that the air pressure value in the reaction device reaches 1.8 multiplied by 105Pa-2 multiplied by 106Pa to obtain polyvinyl alcohol melt in which the protective gas is dissolved; s3, pressing and mixing: keeping the heating temperature in the step S1, and performing stamping and mixing on the material by adopting a stamping mode, wherein the stamping frequency is set to be 5-8S/time, and the mixing time duration is set to be 15-20min, so as to obtain a pre-foaming body; s4, extruding and injection molding: after the mixing in the step S3 is completed, pressing the mixed prefoamed body into an extruder under the action of air pressure, and extruding the prefoamed body into a mold by the operation of the extruder to obtain a foamed molded body; s5, forming material: and (4) performing foaming curing and demolding on the injection mold in the step S4 together with the inner foaming molded body to obtain a finished product, wherein the protective gas in the steps S1 and S2 is set to be CO 2.

2. The starch-free polyvinyl alcohol collodion foaming process according to claim 1, wherein: the step S4 of foaming and curing is set as microwave heating at the temperature of 180-220 ℃ for 5-8 min.

3. An intelligent production device for the starch-free polyvinyl alcohol collodion foaming process of any one of claims 1-2, characterized in that: the punching foaming machine comprises a punching foaming machine (1), wherein a CO2 storage tank (2) is arranged on one side of the punching foaming machine (1), an air entraining pipe (3) is fixedly arranged between the CO2 storage tank (2) and the punching foaming machine (1), a booster pump (4) is arranged on the air entraining pipe (3), the output end and the input end of the booster pump (4) are connected with the air entraining pipe (3), the booster pump (4) is fixedly connected with the outer wall of the punching foaming machine (1), an electronic gas pressure meter (5) is fixedly arranged on the air entraining pipe (3), an extrusion molding machine (6) is arranged on one side, away from the CO2 storage tank (2), of the punching foaming machine (1), the extrusion molding machine (6) is provided with a feeding pipe (7) together with the punching foaming machine (1), and a molding die (8) is arranged at the discharge hole of the extrusion molding machine (6); the punching foaming machine (1) comprises a box shell (11), an electromagnet sucker (12) is fixedly arranged on the top wall of an inner cavity of the box shell (11), a material supplementing component (13) is fixedly arranged at the top end of the box shell (11), an electric heating plate (14) is fixedly arranged on the inner wall of the box shell (11), a connecting rod (15) is fixedly arranged at the bottom end of the electromagnet sucker (12) and the central point of the bottom wall of the inner cavity of the box shell (11), a punching part (16) is sleeved outside the connecting rod (15), a reset elastic part (17) is detachably and movably arranged between the punching part (16) and the bottom wall of the inner cavity of the box shell (11), and a PLC (18) is fixedly arranged on the outer wall of the box shell (11); the stamping part (16) comprises an iron stamping plate (161), a through groove (162) is formed in the joint of the center of the iron stamping plate (161) and the connecting rod (15), a plurality of balls (163) are uniformly arranged on the inner wall of the through groove (162), and a plurality of fixing rings (164) are uniformly and fixedly arranged on the bottom wall of the iron stamping plate (161) and the bottom wall of the inner cavity of the box shell (11); the reset elastic piece (17) comprises a spring main body (171), hooks (172) are fixedly arranged at two ends of the spring main body (171), and the hooks (172) at the two ends of the spring main body are respectively hooked with the bottom wall of the iron punching plate (161) and a fixing ring (164) at the bottom wall of the inner cavity of the box shell (11); electromagnet sucker (12), electric heating plate (14), booster pump (4), electron barometer (5) and extrusion moulding machine (6) all with PLC controller (18) electric connection, and set up the work interval duration of electromagnet sucker (12) in PLC controller (18).

4. The intelligent production equipment for the starch-free polyvinyl alcohol collodion foaming process according to claim 3, characterized in that: an access hole is formed in the bottom of the outer wall of the box shell (11), a door plate (19) is arranged at the access hole, and a hinge and a door lock are arranged between the door plate (19) and the access hole.

5. The intelligent production equipment for the starch-free polyvinyl alcohol collodion foaming process according to claim 4, characterized in that: feed supplement part (13) include feeder hopper (131), feeder hopper (131) bottom and case shell (11) fixed connection just link to each other with case shell (11) inner chamber, feeder hopper (131) top is equipped with sealed lid (132), be equipped with sealed pad (133) between sealed lid (132) and feeder hopper (131).

6. The intelligent production equipment for the starch-free polyvinyl alcohol collodion foaming process according to claim 5, characterized in that: sealed lid (132) inner wall all is equipped with the screw thread with feeder hopper (131) top outer wall, feeder hopper (131) and sealed lid (132) threaded connection, sealed pad (133) are made by rubber materials.

7. The intelligent production equipment for the starch-free polyvinyl alcohol collodion foaming process according to claim 6, characterized in that: the extrusion molding machine (6) comprises a shell, an extrusion screw, a transmission motor, a feeding hole and a discharging hole, wherein one ends of the air-entraining pipe (3) and the feeding pipe (7) penetrate through the box shell (11) and are connected with the inner cavity of the box shell (11), the other end of the feeding pipe (7) is arranged at the position of the feeding hole, and the feeding pipe (7) is further provided with a manual control valve.