Vacuum plastic uptake device with vacuum degree detection function

Abstract

The invention discloses a vacuum plastic uptake device with a vacuum degree detection function, and relates to the technical field of vacuum plastic uptake. A clamping mechanism is used for fixing a machining material, the upper side and the lower side of the material are uniformly heated through a heating mechanism, a sealing space is formed between a forming mechanism and the to-be-machined material through a sealing mechanism, and a vacuum pump is used for extracting gas in the sealing space; the aperture of the air suction hole is dynamically adjusted through the adjusting assembly, so that the heated and softened material is tightly and uniformly adsorbed on the forming mechanism, and the vacuum degree of the sealed space is detected through the detection mechanism, so that the stop time of the vacuum pump is controlled, product defects caused by insufficient vacuum or excessive air suction are avoided, and the production efficiency is improved. And after machining is completed, the clamping mechanism loosens the material, and the machined material is automatically demolded through the demolding assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum thermoforming, and specifically to a vacuum thermoforming device with a vacuum degree detection function. Background Art

[0002] A vacuum thermoforming device generates vacuum suction through a vacuum pump, thereby adsorbing a plastic sheet on the surface of a specified mold, so that the plastic sheet forms a plastic product with a specific shape.

[0003] Traditional vacuum thermoforming devices usually adopt air extraction holes with fixed apertures, resulting in the inability to adjust the air extraction rate of some air extraction holes. As a result, the local air extraction rate of the plastic sheet cannot be dynamically adjusted according to the mold shape or material characteristics. When dealing with molds with deep cavities, multi-curved surfaces, and large differences in aspect ratios, in low-air-resistance areas such as the edges or corners of the mold, too fast an air extraction rate will cause the material to be forcibly stretched, resulting in uneven wall thickness of the product or even cracking. In high-air-resistance areas such as the bottom of the deep cavity, insufficient air extraction may cause the material sheet to not fit tightly against the mold, resulting in wrinkles or bubbles in the material sheet, thereby causing product rejection. Summary of the Invention

[0004] The purpose of the present invention is to provide a vacuum thermoforming device with a vacuum degree detection function to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A vacuum thermoforming device with a vacuum degree detection function, the vacuum thermoforming device includes a bracket 1, a clamping mechanism, a heating mechanism, a forming mechanism, a supporting mechanism, a detection mechanism, and a sealing mechanism. The bracket and the clamping mechanism are fixedly connected, the heating mechanism and the bracket are fixedly connected, the forming mechanism and the bracket are fixedly connected, the supporting mechanism and the bracket are fixedly connected, the detection mechanism and the forming mechanism are fixedly connected, and the sealing mechanism and the forming mechanism are fixedly connected.

[0007] Using the bracket as the installation base to provide a stable working environment for the vacuum thermoforming device, avoiding processing errors caused by factors such as vibration. The operator places the material to be processed on the support mechanism, fixes the processing material through the clamping mechanism, moves the heating mechanism near the material to be processed, and makes the heating mechanism uniformly heat the upper and lower sides of the material to be processed. After heating is completed, the heating mechanism is removed. The forming mechanism moves upward, and through the sealing mechanism, a sealed space is formed between the forming mechanism and the material to be processed. By extracting the gas in the sealed space, the heated and softened material to be processed is adsorbed on the forming mechanism. Through the detection mechanism, the vacuum degree of the sealed space is detected, and then it is judged whether the condition for stopping air extraction is reached, preventing the material to be processed from being overly deformed or not fully adhering to the mold on the forming mechanism, resulting in unqualified products. After the thermoforming process is completed, the clamping mechanism releases the material, and through the support mechanism, the processed material is automatically demolded.

[0008] Further, the forming mechanism includes a forming mold, a suction plate, an adjustment unit, a first electric cylinder, and a vacuum pump. The forming mold is fixedly connected to the suction plate. The suction plate is provided with a plurality of suction holes. There are a plurality of adjustment units, and the plurality of adjustment units are fixedly connected to the suction plate. The first electric cylinder is fixedly connected to the bracket, the output end of the first electric cylinder is fixedly connected to the suction plate, the vacuum pump is fixedly connected to the bracket, the suction plate is provided with a communication groove, the vacuum pump is connected to the communication groove through a pipeline, and the sealing mechanism is fixedly connected to the suction plate.

[0009] The forming mold is installed on the suction plate. Through the first electric cylinder installed on the bracket, the suction plate is fixed on the output end of the first electric cylinder, so that the first electric cylinder drives the suction plate to move upward. Through the sealing mechanism on the suction plate, a sealed space is formed between the suction plate and the material to be processed. Through the vacuum pump, the gas in the communication groove is extracted. The communication groove communicates with a plurality of suction holes, so that the gas in the sealed space is extracted from the plurality of suction holes on the suction plate, and the material is adsorbed onto the surfaces of the forming mold and the suction plate. Through the plurality of adjustment units, the aperture of the corresponding suction hole is adjusted, thereby adjusting the air extraction rate of each area of the material and preventing the vacuum degree in the area corresponding to the suction hole from being too high, resulting in excessive deformation of the material.

[0010] Further, the adjustment unit includes a baffle, a sliding plate, a conical spring, a first sealing ring, and a second sealing ring. The suction plate is provided with a first sliding groove, the baffle is slidably connected to the first sliding groove. The suction plate is provided with a second sliding groove, the sliding plate is slidably connected to the second sliding groove. The sliding plate is fixedly connected to the conical spring, the conical spring is fixedly connected to the second sliding groove, the first sealing ring is fixedly connected to the baffle, and the second sealing ring is fixedly connected to the sliding plate.

[0011] The suction plate is provided with a first sliding groove and a second sliding groove. A slidable baffle is arranged in the first sliding groove, and a sliding plate is arranged in the second sliding groove, so as to form a chamber between the baffle and the sliding plate. The chamber is filled with gas. When the vacuum pump works, the vacuum degree of the suction hole rises, resulting in a decrease in air pressure. The gas in the chamber pushes the baffle to reduce the aperture. The other side of the sliding plate is communicated with the outside, and one end of a conical spring is fixed to the side communicated with the outside, and the other end of the conical spring is fixed to the second sliding groove, so that the external air pressure overcomes the elastic force of the conical spring and the pressure in the chamber minus the pressure of the suction hole, thereby driving the sliding plate to move, reducing the aperture of the suction hole, and thus adjusting the pumping efficiency. By providing a first sealing ring on the baffle and a second sealing ring on the sliding plate, the influence of air leakage on pumping is prevented.

[0012] Further, the suction plate is provided with a plurality of first communication holes and a second communication hole, and the plurality of first communication holes are communicated with the second communication hole.

[0013] By providing a plurality of first communication holes on the suction plate, the first communication holes are communicated with the second sliding groove, and the first communication holes are communicated with the second communication hole, so as to communicate the chambers and make the chambers communicate with each other. When the vacuum degree of the suction hole rises, the gas in the chamber pushes the baffle to move, causing the air pressure in the chamber to drop. The gas in other chambers flows to the chamber with the pressure change, so that other chambers become slightly smaller, and other baffles move into the first sliding groove, slightly enlarging the apertures of other suction holes, improving the pumping efficiency, balancing the pumping rates of different regions of the material, preventing the adjustment of a single suction hole from affecting other suction holes, enabling the material to be evenly stretched, and improving the qualified rate of the product.

[0014] Further, the sealing mechanism includes an air pump, a third sealing ring, a piezoelectric ceramic sheet and a first electrode. The third sealing ring is fixedly connected to the suction plate. The third sealing ring is provided with an installation groove. A plurality of piezoelectric ceramic sheets are arranged in the installation groove. The first electrode is fixedly connected to the piezoelectric ceramic sheet. The third sealing ring is provided with an air inlet hole, and the air pump is connected to the air inlet hole through a pipeline. The air pump is fixedly connected to a bracket.

[0015] By providing a third sealing ring on the suction plate, and the third sealing ring is made of an elastic material, an adsorption area isolated from the outside is formed between the processed material and the suction plate, preventing external gas from flowing into the adsorption area, thereby isolating external interference. By providing an installation groove in the third sealing ring, a plurality of piezoelectric ceramic sheets are arranged in the installation groove, and the piezoelectric ceramic sheets are connected to the first electrode. When pumping air, if air leakage occurs, the pressure received by the piezoelectric ceramic sheets will suddenly drop, generating an electrical signal and transmitting it to the controller through the first electrode. The controller controls the air pump to inflate the installation groove, so that the third sealing ring fits the support mechanism again, preventing air leakage caused by wear due to long-term use of the third sealing ring.

[0016] Further, the detection mechanism includes an installation cylinder, a fixing block, a diaphragm and a second electrode. The installation cylinder is fixedly connected to the suction plate. The installation cylinder is provided with a third communication hole, and the third communication hole is communicated with the communication groove. The installation cylinder is provided with a fourth communication hole. The fixing block is fixedly connected to the installation cylinder. The diaphragm is fixedly connected to the fixing block. There are two second electrodes, and the two second electrodes are electrically connected to the diaphragm in terms of electrical signals.

[0017] Through the installation cylinder being provided with a third communication hole and a fourth communication hole, a diaphragm is arranged inside the installation cylinder through the fixing block. The third communication hole is communicated with the communication groove, and the fourth communication hole is communicated with the outside. Thus, both sides of the diaphragm are respectively communicated with the communication groove and the outside. When the vacuum pump works, the air pressure in the communication groove drops, causing an air pressure difference between the communication groove and the outside. As a result, the forces on both sides of the diaphragm are different, causing deformation, and thus the resistance of the diaphragm changes. By electrically connecting the diaphragm to two second electrodes with positive and negative polarities respectively, the vacuum degree of the communication groove is detected in real time. The stopping time of the vacuum pump is controlled to ensure that when the vacuum pressure for the material to be adsorbed onto the mold reaches the predetermined value, the vacuum pump stops immediately, avoiding product defects caused by insufficient vacuum or excessive air extraction.

[0018] Further, the support mechanism includes a fixed seat, a demolding assembly and a support seat. The fixed seat is fixedly connected to the bracket. There are four demolding assemblies. The four demolding assemblies are slidably connected to the fixed seat, and the four demolding assemblies are fixedly connected to the support seat.

[0019] By fixing the fixed seat to the bracket and connecting the four corners of the support seat with the four demolding assemblies, the support seat is stably fixed on the fixed seat. After thermoforming is completed, when the clamping mechanism releases the material, the demolding assembly slides upward, causing the support seat to slide upward accordingly, so that the material is demolded from the mold, reducing the demolding time of the worker and thus increasing the construction efficiency.

[0020] Further, the demolding assembly includes a slide bar and a return spring. The fixed seat is provided with a third sliding groove. The return spring is placed in the third sliding groove, and the slide bar is slidably connected to the third sliding groove.

[0021] By the fixed seat being provided with a third sliding groove and installing a return spring in the third sliding groove, when the clamping mechanism releases the material, the return spring releases elastic force, pushing the slide bar to slide vertically upward in the third sliding groove, causing the slide bar and the support seat to reset, thus performing demolding.

[0022] Further, the heating mechanism includes a fixing plate, a linear module, a heating plate and a connecting plate. There are two fixing plates. The two fixing plates are fixedly connected to the bracket. The linear module is fixedly connected to the two fixing plates. There are two heating plates. The sliding end of the linear module is fixedly connected to one heating plate, and the connecting plate is fixedly connected to the two heating plates.

[0023] Fix both ends of the linear module through two fixing plates, fix it through the sliding end of the linear module and a heating plate. The linear module drives the heating plate to move to the upper side of the material to be processed. One heating plate is fixed to another heating plate through a connecting plate, so that the other heating plate synchronously moves to the lower side of the material to be processed. By symmetrically arranging the two heating plates, the upper and lower sides of the material to be processed are uniformly heated, reducing the thickness deviation and shape defects caused by uneven stretching of the material due to uneven heating.

[0024] Furthermore, the clamping mechanism includes a second electric cylinder and a clamping frame. The second electric cylinder is fixedly connected to the bracket, and the output end of the second electric cylinder is fixedly connected to the clamping frame.

[0025] Fixed by the second electric cylinder and the bracket, and the output end of the second electric cylinder is fixed to the clamping frame, so that the second electric cylinder drives the clamping frame to clamp the material placed on the support seat, preventing the material from shifting during the thermoforming process and affecting the forming effect of the material.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] 1. By setting the adjustment unit, the aperture of the suction holes is adjusted, thereby dynamically adjusting the air extraction rate of each area of the material, preventing the vacuum degree of the corresponding area from being too high or too low, resulting in excessive deformation of the material or inability to closely fit the mold, thus improving the qualified rate of the product.

[0028] 2. When air leakage occurs at the third sealing ring, the air pump inflates the third sealing ring to prevent air leakage of the third sealing ring and reduce the interference of external air flow on the forming.

[0029] 3. The detection mechanism detects the vacuum degree of the communication groove in real time. When the vacuum pressure for the material to be adsorbed to the mold reaches a predetermined value, it controls the vacuum pump to stop immediately, avoiding product defects caused by insufficient vacuum or excessive air extraction.

[0030] 4. The demolding component automatically demolds the material from the mold, reducing the demolding time of workers, thereby increasing the construction efficiency.

[0031] 5. The upper and lower sides of the material to be processed are uniformly heated by two heating plates, reducing the thickness deviation and shape defects caused by uneven stretching of the material due to uneven heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of the present invention;

[0033] Figure 2 is the internal structural schematic diagram of the present invention;

[0034] Figure 3 is the structural schematic diagram of the forming mechanism of the present invention;

[0035] Figure 4 is Figure 3 a partially enlarged view of A of

[0036] Figure 5 a schematic structural view of the sealing mechanism of the present invention;

[0037] Figure 6 is Figure 3 a partially enlarged view of B of

[0038] Figure 7 a schematic structural view of the distribution of the air suction holes of the present invention;

[0039] Figure 8 a schematic structural view of the adjustment unit of the present invention;

[0040] Figure 9 a schematic structural view of the first communication hole and the second communication hole of the present invention;

[0041] Figure 10 a schematic structural view of the distribution of the piezoelectric ceramic sheets of the present invention;

[0042] Figure 11 a schematic structural view of the support mechanism of the present invention.

[0043] In the figure: 1. bracket; 2. clamping mechanism; 21. second electric cylinder; 22. clamping frame; 3. heating mechanism; 31. fixing plate; 32. linear module; 33. heating plate; 34. connecting plate; 4. forming mechanism; 41. forming die; 42. air suction plate; 421. air suction hole; 422. communication groove; 423. first sliding groove; 424. second sliding groove; 425. first communication hole; 426. second communication hole; 43. adjustment unit; 431. baffle; 432. sliding plate; 433. conical spring; 434. first sealing ring; 435. second sealing ring; 44. first electric cylinder; 45. vacuum pump; 5. support mechanism; 51. fixed seat; 511. third sliding groove; 52. demolding assembly; 521. sliding rod; 522. return spring; 53. support seat; 6. detection mechanism; 61. mounting cylinder; 611. third communication hole; 612. fourth communication hole; 62. fixing block; 63. diaphragm; 64. second electrode; 7. sealing mechanism; 71. air pump; 72. third sealing ring; 721. mounting groove; 722. air delivery hole; 73. piezoelectric ceramic sheet; 74. first electrode. Detailed implementation manners

[0044] Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0045] Embodiment: As Figures 1 - 5As shown in the figure, the present invention provides a technical solution for a vacuum thermoforming device with a vacuum degree detection function. A vacuum thermoforming device includes a bracket 1, a clamping mechanism 2, a heating mechanism 3, a forming mechanism 4, a support mechanism 5, a detection mechanism 6 and a sealing mechanism 7. The bracket 1 is fixedly connected to the clamping mechanism 2, the heating mechanism 3 is fixedly connected to the bracket 1, the forming mechanism 4 is fixedly connected to the bracket 1, the support mechanism 5 is fixedly connected to the bracket 1, the detection mechanism 6 is fixedly connected to the forming mechanism 4, and the sealing mechanism 7 is fixedly connected to the forming mechanism 4.

[0046] Taking the bracket 1 as the installation foundation, a stable working environment is provided for the vacuum thermoforming device, avoiding processing errors caused by factors such as vibration. The operator places the material to be processed on the support mechanism 5, fixes the processing material through the clamping mechanism 2, moves the heating mechanism 3 to the vicinity of the material to be processed through the heating mechanism 3, and evenly heats the upper and lower sides of the material to be processed by the heating mechanism 3. After heating is completed, the heating mechanism 3 is moved away. The forming mechanism 4 moves upward, and through the sealing mechanism 7, a sealed space is formed between the forming mechanism 4 and the material to be processed. By extracting the gas in the sealed space, the heated and softened material to be processed is adsorbed on the forming mechanism 4. Through the detection mechanism 6, the vacuum degree of the sealed space is detected, and then it is judged whether the condition for stopping air extraction is reached, preventing the material to be processed from being overly deformed or not completely adhering to the mold on the forming mechanism 4, resulting in unqualified products. After the thermoforming process is completed, the clamping mechanism 2 releases the material, and through the support mechanism 5, the processed material is automatically demolded.

[0047] As Figure 2 、 Figure 6 and Figure 7 shown in the figure, the forming mechanism 4 includes a forming mold 41, a suction plate 42, an adjustment unit 43, a first electric cylinder 44 and a vacuum pump 45. The forming mold 41 is fixedly connected to the suction plate 42. The suction plate 42 is provided with a plurality of suction holes 421. There are a plurality of adjustment units 43, and the plurality of adjustment units 43 are fixedly connected to the suction plate 42. The first electric cylinder 44 is fixedly connected to the bracket 1, the output end of the first electric cylinder 44 is fixedly connected to the suction plate 42, the vacuum pump 45 is fixedly connected to the bracket 1, the suction plate 42 is provided with a communication groove 422, the vacuum pump 45 is connected to the communication groove 422 through a pipeline, and the sealing mechanism 7 is fixedly connected to the suction plate 42.

[0048] It is installed on the suction plate 42 through the forming die 41. Through the first electric cylinder 44 installed on the bracket 1, the suction plate 42 is fixed on the output end of the first electric cylinder 44, so that the first electric cylinder 44 drives the suction plate 42 to move upward. Through the sealing mechanism 7 on the suction plate 42, a sealed space is formed between the suction plate 42 and the material to be processed. Through the vacuum pump 45, the gas in the communication groove 422 is extracted. The communication groove 422 communicates with a number of suction holes 421, so that the gas between the sealed spaces is extracted from a number of suction holes 421 on the suction plate 42, and the material is adsorbed onto the surfaces of the forming die 41 and the suction plate 42. Through a number of adjusting units 43, the aperture of the corresponding suction hole 421 is adjusted, so as to adjust the air extraction rate of each area of the material and prevent the vacuum degree of the area corresponding to the suction hole 421 from being too high, resulting in excessive deformation of the material.

[0049] As Figure 8 shown, the adjusting unit 43 includes a baffle 431, a sliding plate 432, a conical spring 433, a first sealing ring 434 and a second sealing ring 435. The suction plate 42 is provided with a first sliding groove 423, and the baffle 431 is slidably connected with the first sliding groove 423. The suction plate 42 is provided with a second sliding groove 424, and the sliding plate 432 is slidably connected with the second sliding groove 424. The sliding plate 432 is fixedly connected with the conical spring 433, and the conical spring 433 is fixedly connected with the second sliding groove 424. The first sealing ring 434 is fixedly connected with the baffle 431, and the second sealing ring 435 is fixedly connected with the sliding plate 432.

[0050] Through the suction plate 42 being provided with a first sliding groove 423 and a second sliding groove 424, a slidable baffle 431 is arranged in the first sliding groove 423, and a sliding plate 432 is arranged in the second sliding groove 424, so that a chamber is formed between the baffle 431 and the sliding plate 432, and the chamber is filled with gas. When the vacuum pump 45 works, the vacuum degree of the suction hole 421 rises, resulting in a decrease in air pressure. The gas in the chamber pushes the baffle 431 to reduce the aperture. The other side of the sliding plate 432 communicates with the outside, and the side communicating with the outside is fixedly connected with one end of the conical spring 433, and the other end of the conical spring 433 is fixedly connected to the second sliding groove 424, so that the external air pressure overcomes the elastic force of the conical spring 433 and the pressure in the chamber minus the pressure of the suction hole 421, thereby driving the sliding plate 432 to move, reducing the aperture of the suction hole 421, and thus adjusting the air extraction efficiency. By arranging the first sealing ring 434 on the baffle 431 and the second sealing ring 435 on the sliding plate 432, the influence of air leakage on air extraction is prevented.

[0051] As Figure 8 and Figure 9 shown, the suction plate 42 is provided with a number of first communication holes 425, and the suction plate 42 is provided with a second communication hole 426. The number of first communication holes 425 communicates with the second communication hole 426.

[0052] By providing a number of first communication holes 425 in the air suction plate 42, the first communication holes 425 communicate with the second sliding grooves 424, and communicate with the first communication holes 425 through the second communication holes 426, thereby communicating the chambers and enabling communication between the respective chambers. Thus, when the vacuum degree rises at the air suction holes 421, the gas in the chamber pushes the baffle 431 to move, causing the atmospheric pressure in the chamber to drop. The gas in other chambers flows into the chamber with the pressure change, thereby making other chambers slightly smaller, causing other baffles 431 to move into the first sliding grooves 423, slightly expanding the apertures of other air suction holes 421, improving the air extraction efficiency, balancing the air extraction rates of various regions of the material, preventing the adjustment of a single air suction hole 421 from affecting other air suction holes 421, enabling the material to be uniformly stretched, and improving the qualified rate of the product.

[0053] As Figure 2 , Figure 5 and Figure 10 shown, the sealing mechanism 7 includes an air pump 71, a third sealing ring 72, a piezoelectric ceramic sheet 73, and a first electrode 74. The third sealing ring 72 is fixedly connected to the air suction plate 42. The third sealing ring 72 is provided with an installation groove 721. A number of piezoelectric ceramic sheets 73 are provided. The number of piezoelectric ceramic sheets 73 is placed in the installation groove 721. The first electrode 74 is fixedly connected to the piezoelectric ceramic sheet 73. The third sealing ring 72 is provided with an air delivery hole 722. The air pump 71 is connected to the air delivery hole 722 through a pipeline, and the air pump 71 is fixedly connected to the bracket 1.

[0054] By providing the third sealing ring 72 on the air suction plate 42, and the third sealing ring 72 being made of an elastic material, an adsorption area isolated from the outside is formed between the processed material and the air suction plate 42, preventing external gas from flowing into the adsorption area, thereby isolating external interference. By providing the installation groove 721 in the third sealing ring 72, a number of piezoelectric ceramic sheets 73 are arranged in the installation groove 721, and the piezoelectric ceramic sheet 73 is connected to the first electrode 74. When pumping air, if air leakage occurs, the pressure received by the piezoelectric ceramic sheet 73 will suddenly drop, generating an electrical signal that is transmitted to the controller through the first electrode 74. The controller controls the air pump 71 to inflate the installation groove 721, causing the third sealing ring 72 to reattach to the support mechanism 5, preventing air leakage caused by wear during the long-term use of the third sealing ring 72.

[0055] As Figure 4 shown, the detection mechanism 6 includes an installation cylinder 61, a fixed block 62, a diaphragm 63, and a second electrode 64. The installation cylinder 61 is fixedly connected to the air suction plate 42. The installation cylinder 61 is provided with a third communication hole 611, and the third communication hole 611 communicates with the communication groove 422. The installation cylinder 61 is provided with a fourth communication hole 612. The fixed block 62 is fixedly connected to the installation cylinder 61. The diaphragm 63 is fixedly connected to the fixed block 62. Two second electrodes 64 are provided, and the two second electrodes 64 are electrically connected to the diaphragm 63.

[0056] The installation cylinder 61 is provided with a third communication hole 611 and a fourth communication hole 612. Inside the installation cylinder 61, a diaphragm 63 is arranged through a fixing block 62. The third communication hole 611 is communicated with the communication groove 422, and the fourth communication hole 612 is communicated with the outside world, so that both sides of the diaphragm 63 are respectively communicated with the communication groove 422 and the outside world. When the vacuum pump 45 works, the air pressure in the communication groove 422 drops, causing an air pressure difference between the communication groove 422 and the outside world. As a result, the forces on both sides of the diaphragm 63 are different, causing deformation, and thus the resistance of the diaphragm 63 changes. The diaphragm 63 is electrically connected through two second electrodes 64 with positive and negative polarities respectively, thereby detecting the vacuum degree of the communication groove 422, detecting the vacuum degree of the communication groove 422 in real time, controlling the stop time of the vacuum pump 45, and ensuring that when the vacuum pressure for adsorbing the material to the mold reaches the predetermined value, the vacuum pump 45 is immediately stopped, avoiding product defects caused by insufficient vacuum or excessive air extraction.

[0057] As Figure 11 shown, the support mechanism 5 includes a fixed seat 51, a demolding assembly 52, and a support seat 53. The fixed seat 51 is fixedly connected to the bracket 1. There are four demolding assemblies 52. The four demolding assemblies 52 are slidably connected to the fixed seat 51, and the four demolding assemblies 52 are fixedly connected to the support seat 53.

[0058] Fixed through the fixed seat 51 and the bracket 1, the four demolding assemblies 52 are connected to the four corners of the support seat 53, so that the support seat 53 is stably fixed on the fixed seat 51. When the clamping mechanism 2 releases the material after thermoforming, the demolding assembly 52 slides upward, causing the support seat 53 to slide upward accordingly, so that the material is demolded from the mold, reducing the demolding time of the worker and thus increasing the construction efficiency.

[0059] As Figure 11 shown, the demolding assembly 52 includes a sliding rod 521 and a return spring 522. The fixed seat 51 is provided with a third sliding groove 511. The return spring 522 is placed in the third sliding groove 511, and the sliding rod 521 is slidably connected to the third sliding groove 511.

[0060] With the fixed seat 51 provided with the third sliding groove 511 and the return spring 522 installed in the third sliding groove 511, when the clamping mechanism 2 releases the material, the return spring 522 releases elastic force, pushing the sliding rod 521 to slide vertically upward in the third sliding groove 511, resetting the sliding rod 521 and the support seat 53, and thus demolding.

[0061] As Figure 2 shown, the heating mechanism 3 includes a fixing plate 31, a linear module 32, a heating plate 33, and a connecting plate 34. There are two fixing plates 31. The two fixing plates 31 are fixedly connected to the bracket 1. The linear module 32 is fixedly connected to the two fixing plates 31. There are two heating plates 33. The sliding end of the linear module 32 is fixedly connected to one heating plate 33, and the connecting plate 34 is fixedly connected to the two heating plates 33.

[0062] Both ends of the linear module 32 are fixed by two fixing plates 31, and one end of the sliding part of the linear module 32 is fixed to a heating plate 33. The linear module 32 drives the heating plate 33 to move to the upper side of the material to be processed. One heating plate 33 is fixed to another heating plate 33 through a connecting plate 34, so that the other heating plate 33 synchronously moves to the lower side of the material to be processed. By symmetrically arranging the two heating plates 33, the upper and lower sides of the material to be processed can be uniformly heated, reducing the thickness deviation and shape defects caused by uneven stretching of the material due to uneven heating.

[0063] Such as Figure 2 As shown in the figure, the clamping mechanism 2 includes a second electric cylinder 21 and a clamping frame 22. The second electric cylinder 21 is fixedly connected to the bracket 1, and the output end of the second electric cylinder 21 is fixedly connected to the clamping frame 22.

[0064] Fixed by the second electric cylinder 21 and the bracket 1, and the output end of the second electric cylinder 21 is fixed to the clamping frame 22, so that the second electric cylinder 21 drives the clamping frame 22 to clamp the material placed on the support seat 53, preventing the material from shifting during the thermoforming process and affecting the forming effect of the material.

[0065] Working principle: The operator places the material to be processed on the support seat 53. The second electric cylinder 21 drives the clamping frame 22 to move downward, and the return spring 522 is compressed. The support seat 53 moves to the fixed seat 51 to clamp the material. The linear module 32 drives the two heating plates 33 to move to the upper and lower sides of the material to heat the material. After heating is completed, they are moved away. The first electric cylinder 44 drives the third sealing ring 72 to closely fit with the support seat 53, and the vacuum pump 45 is turned on, so that gas flows out from the suction hole 421. The third sealing ring 72 dynamically adjusts the sealing condition. Both sides of the diaphragm 63 are respectively communicated with the communication groove 422 and the outside. The diaphragm 63 deforms due to different forces, causing the resistance to change, and the vacuum degree is detected in real time, so as to control the stop time of the vacuum pump 45, so that the material adheres to the forming die 41. At the same time, when the vacuum degree of the suction hole 421 rises, the gas in the chamber pushes the baffle 431 to reduce the aperture. At the same time, the external air pressure overcomes the elastic force of the conical spring 433 and the chamber pressure minus the pressure of the suction hole 421, thereby driving the sliding plate 432 to move, so that the aperture of the suction hole 421 shrinks, thereby adjusting the air extraction efficiency. The gas in other chambers flows to the chamber with changing air pressure, thereby slightly expanding the apertures of other suction holes 421. The second electric cylinder 21 releases the material, and the return spring 522 pushes the support seat 53 to reset, thus realizing automatic demolding.

[0066] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A vacuum blister device with vacuum degree detection function, characterized in that: The vacuum forming device comprises a bracket (1), a clamping mechanism (2), a heating mechanism (3), a molding mechanism (4), a supporting mechanism (5), a detecting mechanism (6) and a sealing mechanism (7); the bracket (1) and the clamping mechanism (2) are fixedly connected, the heating mechanism (3) and the bracket (1) are fixedly connected, the molding mechanism (4) and the bracket (1) are fixedly connected, the supporting mechanism (5) and the bracket (1) are fixedly connected, the detecting mechanism (6) and the molding mechanism (4) are fixedly connected, and the sealing mechanism (7) and the molding mechanism (4) are fixedly connected.

2. A vacuum blister device with vacuum degree detection function according to claim 1, characterized in that: The molding mechanism (4) comprises a molding die (41), an air suction plate (42), an adjustment unit (43), a No. 1 electric cylinder (44) and a vacuum pump (45); the molding die (41) and the air suction plate (42) are fixedly connected; the air suction plate (42) is provided with a plurality of air suction holes (421); the adjustment unit (43) is provided with a plurality of adjustment units (43) and the air suction plate (42) are fixedly connected; the No. 1 electric cylinder (44) and the bracket (1) are fixedly connected; the output end of the No. 1 electric cylinder (44) and the air suction plate (42) are fixedly connected; the vacuum pump (45) and the bracket (1) are fixedly connected; the air suction plate (42) is provided with a connecting groove (422); the vacuum pump (45) and the connecting groove (422) are connected by a pipeline; and the sealing mechanism (7) and the air suction plate (42) are fixedly connected.

3. A vacuum blister device with vacuum degree detection function according to claim 2, characterized in that: The regulating unit (43) comprises a baffle (431), a sliding plate (432), a conical spring (433), a first sealing ring (434) and a second sealing ring (435); the air suction plate (42) is provided with a first sliding groove (423); the baffle (431) and the first sliding groove (423) are slidably connected; the air suction plate (42) is provided with a second sliding groove (424); the sliding plate (432) and the second sliding groove (424) are slidably connected; the sliding plate (432) and the conical spring (433) are fixedly connected; the conical spring (433) and the second sliding groove (424) are fixedly connected; the first sealing ring (434) and the baffle (431) are fixedly connected; and the second sealing ring (435) and the sliding plate (432) are fixedly connected.

4. The vacuum blister device with vacuum degree detection function according to claim 3, characterized in that: The air intake plate (42) is provided with a plurality of No. 1 communication holes (425), and the air intake plate (42) is provided with a No. 2 communication hole (426), and the plurality of No. 1 communication holes (425) are connected to the No. 2 communication holes (426).

5. The vacuum blister device with vacuum degree detection function according to claim 4, characterized in that: The sealing mechanism (7) comprises an air pump (71), a No. 3 sealing ring (72), a piezoelectric ceramic sheet (73) and a No. 1 electrode (74); the No. 3 sealing ring (72) and the air suction plate (42) are fixedly connected; the No. 3 sealing ring (72) is provided with a mounting groove (721); a plurality of piezoelectric ceramic sheets (73) are provided, and the plurality of piezoelectric ceramic sheets (73) are placed in the mounting groove (721); the No. 1 electrode (74) and the piezoelectric ceramic sheet (73) are fixedly connected; the No. 3 sealing ring (72) is provided with an air delivery hole (722); the air pump (71) and the air delivery hole (722) are connected by a pipeline; and the air pump (71) and the bracket (1) are fixedly connected.

6. The vacuum blister device with vacuum degree detection function according to claim 5, characterized in that: The detection mechanism (6) comprises a mounting tube (61), a fixing block (62), a diaphragm (63) and a No. 2 electrode (64); the mounting tube (61) is fixedly connected to the air suction plate (42); the mounting tube (61) is provided with a No. 3 connecting hole (611); the No. 3 connecting hole (611) is connected to the connecting groove (422); the mounting tube (61) is provided with a No. 4 connecting hole (612); the fixing block (62) is fixedly connected to the mounting tube (61); the diaphragm (63) is fixedly connected to the fixing block (62); two No. 2 electrodes (64) are provided; the two No. 2 electrodes (64) and the diaphragm (63) are electrically signal connected.

7. The vacuum blister device with vacuum degree detection function according to claim 6, characterized in that: The support mechanism (5) comprises a fixed seat (51), a demoulding assembly (52) and a support seat (53); the fixed seat (51) is fixedly connected to the bracket (1); four demoulding assemblies (52) are provided; the four demoulding assemblies (52) are slidably connected to the fixed seat (51); and the four demoulding assemblies (52) are fixedly connected to the support seat (53).

8. The vacuum blister device with vacuum degree detection function according to claim 7, characterized in that: The demoulding assembly (52) comprises a sliding rod (521) and a return spring (522); the fixed seat (51) is provided with a No. 3 sliding groove (511); the return spring (522) is placed in the No. 3 sliding groove (511); and the sliding rod (521) and the No. 3 sliding groove (511) are slidably connected.

9. The vacuum blister device with vacuum degree detection function according to claim 8, characterized in that: The heating mechanism (3) comprises a fixed plate (31), a linear module (32), a heating plate (33) and a connecting plate (34); two fixed plates (31) are provided, and the two fixed plates (31) are fixedly connected to the bracket (1); the linear module (32) is fixedly connected to the two fixed plates (31); two heating plates (33) are provided, and the sliding end of the linear module (32) is fixedly connected to one heating plate (33); and the connecting plate (34) is fixedly connected to the two heating plates (33).

10. The vacuum blister device with vacuum degree detection function according to claim 9, characterized in that: The clamping mechanism (2) comprises a No. 2 electric cylinder (21) and a clamping frame (22); the No. 2 electric cylinder (21) and the bracket (1) are fixedly connected; and the output end of the No. 2 electric cylinder (21) and the clamping frame (22) are fixedly connected.

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