Automatic shaping and packaging equipment for preparing vacuum insulation board

Abstract

The utility model relates to the field of vacuum insulation boards, in particular to a vacuum insulation board preparation process and automatic shaping and packaging equipment. After a negative pressure cavity upper seat and a negative pressure cavity lower seat are spliced, a valve and a negative pressure device at a negative pressure opening are opened; the elastic module always maintains that the convex die and the concave die jointly flatten the two opposite sides of the vacuum heat insulation bag; and finally obtaining the vacuum insulation board with two flat sides. And the process of preparing foamed polystyrene particles into a plate at present is omitted.

Description

Technical Field

[0001] The utility model relates to the field of vacuum insulation boards, in particular to a vacuum insulation board preparation process and automatic shaping and packaging equipment. Background Art

[0002] Vacuum insulation board has good heat insulation properties and is often used to make refrigerators and thermal insulation containers to effectively keep perishable items such as food and medicine fresh and stable.

[0003] The traditional manufacturing process of vacuum insulation board is as follows: ultrafine glass fiber is placed in a regular non-woven bag, pressed into an inorganic core board, and finally the formed inorganic core board is placed in a highly flame-retardant aluminum foil vacuum insulation bag, and the air in the bag is extracted by a vacuum unit for packaging. Due to the high density of glass fiber, the vacuum insulation board is relatively heavy, and the transportation cost of the insulation container made therefrom is correspondingly high.

[0004] At present, the manufacturing process of the new vacuum insulation board is as follows: first, the polystyrene particles are steam-foamed; then, the foamed polystyrene particles are bonded into boards; the boards are dried (the residual moisture is between 1% and 2%); the polystyrene boards are placed in vacuum insulation bags, and the air in the bags is extracted by a vacuum unit for packaging; since the density of polystyrene is much lower than that of glass fiber, the weight of the vacuum insulation board is reduced; however, when the vacuum is drawn, the air in the closed gaps formed between the particles in the polystyrene board is not easily sucked away, thereby affecting the vacuum degree of the vacuum insulation board; in addition, the residual moisture therein will also reduce the vacuum degree of the vacuum insulation board. Utility Model Content

[0005] The utility model provides a vacuum insulation board preparation process and automatic shaping and packaging equipment, and aims to solve the technical problem of how to reduce the weight of the vacuum insulation board while improving the vacuum degree or heat insulation capacity of the vacuum insulation board.

[0006] In order to achieve the above utility model purpose, the technical solution adopted by the utility model is:

[0007] The vacuum insulation board preparation process comprises the following steps:

[0008] Step S100, placing the heat-insulating material particles in a foaming container and heating them to foam, and foaming the heat-insulating material particles to a density of 50-120 kg / m3;

[0009] Step S200, putting the foamed thermal insulation material particles into a vacuum insulation bag;

[0010] Step S300, shaping and vacuuming: placing the vacuum insulation bag containing the foamed insulation material particles between the male mold and the female mold, and the adjacent planes of the male mold and the female mold can maintain the flatness of the vacuum insulation bag; at the same time, vacuuming the vacuum insulation bag;

[0011] Step S400: After the vacuuming process is completed, the opening of the vacuum insulation bag is sealed to obtain a vacuum insulation board.

[0012] Furthermore, in step S100, the foaming container is heated, and the heat-insulating material particles therein are stirred to allow the foaming to be uniform.

[0013] Further, in step S100, the thermal insulation material particles are polystyrene particles; or, mixed particles of polystyrene particles and fumed silica; or, foamed polypropylene particles.

[0014] On the other hand, the automatic shaping and packaging equipment for preparing the vacuum insulation board includes:

[0015] A negative pressure container, comprising a negative pressure chamber upper seat and a negative pressure chamber lower seat; wherein, after the negative pressure chamber upper seat and the negative pressure chamber lower seat are assembled, the two together enclose a closed negative pressure chamber; the negative pressure chamber lower seat is provided with a pressure relief port and a negative pressure port, the pressure relief port and the negative pressure port are connected with the negative pressure chamber; valves are installed on the outer sides of the pressure relief port and the negative pressure port, and the valves are used to open / close the pressure relief port and the negative pressure port;

[0016] A negative pressure device, which is used to generate negative pressure, wherein the negative pressure generating port of the negative pressure device is connected to the negative pressure chamber via a valve at the negative pressure port;

[0017] A molding die, which is located in the negative pressure chamber, and includes an elastic module, a male die, and a female die; the elastic module is located in the negative pressure chamber and is fixedly connected to the upper seat of the negative pressure chamber, the male die is connected to the elastic module, and the female die is located in the negative pressure chamber and is fixedly connected to the lower seat of the negative pressure chamber;

[0018] Among them, after the upper seat of the negative pressure chamber and the lower seat of the negative pressure chamber are assembled, the valve and the negative pressure device at the negative pressure port are opened. During the process of evacuating the vacuum insulation bag in the die, the elastic force of the elastic module always maintains the punch and the die to flatten the opposite sides of the vacuum insulation bag.

[0019] Furthermore, a rubber layer is installed on the splicing contact surface of the negative pressure chamber lower seat with the negative pressure chamber upper seat, and the rubber layer is used to improve the sealing performance between the splicing contact surface of the negative pressure chamber lower seat and the negative pressure chamber upper seat.

[0020] Furthermore, the elastic module includes an upper die seat, a guide rod, and a buffer spring; the upper die seat is located in the negative pressure chamber and is fixedly connected to the upper seat of the negative pressure chamber, and a plurality of guide rods are fixedly arranged below the upper die seat, and the lower ends of the plurality of guide rods slide through the punch, and a limiting portion is arranged at the lower end of the guide rod, which prevents the punch from sliding off the guide rod; the buffer spring is sleeved on the outside of the guide rod, and the buffer spring is located between the upper die seat and the punch.

[0021] Furthermore, it also includes an electric heat sealer, the direct sealing components of which are a lower sealing seat and an upper sealing seat, wherein the lower sealing seat and the upper sealing seat clamp the sealing portion of the bag and then heat and seal it, the lower sealing seat of the electric heat sealer is fixedly connected to the lower seat of the negative pressure chamber, and the upper sealing seat of the electric heat sealer is fixedly connected to the upper seat of the pressure chamber;

[0022] When the upper sealing seat follows the negative pressure chamber upper seat and descends to a set position, the lower sealing seat and the upper sealing seat are clamped and close the opening of one end of the vacuum insulation bag.

[0023] Furthermore, two electric heating sealing devices are provided, one of which is used as a standby device; the lower sealing seat and the upper sealing seat of the two electric heating sealing devices are arranged at the opposite ends of the vacuum insulation bag in the die.

[0024] Further, it also includes a frame and a lifting device;

[0025] The frame is fixedly provided with a negative pressure chamber lower seat, the negative pressure chamber upper seat is located above the negative pressure chamber lower seat, and the negative pressure chamber upper seat is connected to the frame in an up-and-down sliding manner;

[0026] The lifting device is installed on the frame, and the lifting device is used to drive the negative pressure chamber upper seat so that the negative pressure chamber upper seat and the negative pressure chamber lower seat are spliced ​​or opened.

[0027] Further, the PLC controller controls the lifting device to move upward and downward through the solenoid valve C;

[0028] The PLC controller controls the electric heating sealing device to start / stop heating through relay B;

[0029] The PLC controller controls the start and stop of the negative pressure equipment through relay C;

[0030] The valves of the pressure relief port and the negative pressure port are solenoid valve A and solenoid valve B; the PLC controller controls the on / off of the pressure relief port and the negative pressure port respectively through the solenoid valve A and the solenoid valve B;

[0031] The detection end of the pressure sensor is located in the negative pressure container, and is used to detect the pressure of the negative pressure chamber.

[0032] The beneficial effects of the utility model are:

[0033] After the negative pressure chamber upper seat 11 and the negative pressure chamber lower seat 12 are assembled, the valve and the negative pressure device at the negative pressure port 122 are opened, and during the process of evacuating the vacuum insulation bag in the die 25, the elastic module always maintains the punch 24 and the die 25 to jointly flatten the opposite sides of the vacuum insulation bag, and finally a vacuum insulation board with flat sides is obtained, and the current process of "preparing the foamed polystyrene particles into boards" is saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the steps of the vacuum insulation board preparation process;

[0035] Figure 2 is a diagram showing the combined state of the negative pressure container 10 and the forming mold 20;

[0036] Figure 3 It is a schematic diagram of the structure in which the vacuum insulation bag 00 is placed inside the concave mold 25;

[0037] Figure 4 It is a schematic diagram of the cooperation between the frame 40 and the negative pressure container 10;

[0038] Figure 5 It is a logic diagram of the automatic control system;

[0039] Figure 6 Add a schematic diagram for the punch counterweight 241;

[0040] Reference table of reference numerals:

[0041] Vacuum insulation bag 00;

[0042] Negative pressure container 10, negative pressure chamber upper seat 11, negative pressure chamber lower seat 12, pressure relief port 121, negative pressure port 122;

[0043] A forming die 20, an upper die base 21, a guide rod 22, a buffer spring 23, a punch 24, a punch counterweight 241, and a die 25;

[0044] Electric heating sealing device 30, lower sealing seat 31, upper sealing seat 32, servo lifting device 33;

[0045] Frame 40 and lifting device 50. DETAILED DESCRIPTION

[0046] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0047] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the accompanying drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0048] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0049] See also Figure 1 , the vacuum insulation board preparation process comprises the following steps,

[0050] Step S100, heat the insulation material particles in a foaming container to foam them, and foam the insulation material particles to a density of 50-120 kg / m3, which is much lower than the density of glass fiber. The foaming container is heated, and the insulation material particles therein are stirred to allow them to foam evenly; the heating method can be electric heating, which avoids the moisture generated in the insulation material particles by steam foaming.

[0051] Preferably, the thermal insulation material particles are polystyrene particles, or mixed particles of polystyrene particles and fumed silica; or expanded polypropylene (EPP) particles.

[0052] Step S200, putting the foamed thermal insulation material particles into a vacuum insulation bag; in addition, a getter may also be put into the bag at the same time.

[0053] Step S300, shaping and vacuuming: placing the vacuum insulation bag containing the foamed insulation material particles between the male and female molds, and the adjacent planes of the male and female molds can maintain the flatness of the vacuum insulation bag; at the same time, vacuuming the vacuum insulation bag.

[0054] Step S400: After the vacuuming process is completed, the opening of the vacuum insulation bag is sealed to obtain a vacuum insulation board.

[0055] In summary, since the foaming of the thermal insulation material particles of the present application is done by electric heating, the moisture generated by traditional steam foaming is avoided, and thus the present application reduces the moisture in the vacuum insulation board after evacuation, thereby improving the thermal insulation capacity of the vacuum insulation board. Furthermore, after the loose foamed thermal insulation material particles are loaded into the vacuum insulation bag, the gaps between the loose thermal insulation material particles are unobstructed, and thus the vacuum insulation bag can be evacuated in a short time. In addition, since there is no enclosed space between the loose thermal insulation material particles, the vacuum degree of the vacuum insulation board of the present application can also be improved, thereby improving the thermal insulation capacity of the vacuum insulation board. In short, the weight of the vacuum insulation board is reduced while the vacuum degree or thermal insulation capacity of the vacuum insulation board is improved.

[0056] In addition, since the adjacent extrusion planes of the punch and die always maintain the flatness of the opposite sides of the vacuum insulation bag, the flatness of the front and back sides of the vacuum insulation board can be maintained during the vacuuming process, and finally a vacuum insulation board with flat sides is obtained; the current process of "preparing the foamed polystyrene particles into boards" is saved.

[0057] See also Figures 2 to 5 , automatic shaping and packaging equipment for vacuum insulation board preparation,

[0058] See also Figure 2 The negative pressure container 10 includes a negative pressure chamber upper seat 11 and a negative pressure chamber lower seat 12; wherein, after the negative pressure chamber upper seat 11 and the negative pressure chamber lower seat 12 are assembled from top to bottom, the two together enclose a closed negative pressure chamber. Preferably, the negative pressure chamber lower seat 12 is installed with a rubber layer on the assembled contact surface with the negative pressure chamber upper seat 11, and the rubber layer is used to improve the sealing performance between the assembled contact surface of the negative pressure chamber lower seat 12 and the negative pressure chamber upper seat 11. The negative pressure chamber lower seat 12 is provided with a pressure relief port 121 and a negative pressure port 122, and the pressure relief port 121 and the negative pressure port 122 are connected to the negative pressure chamber. Valves are installed on the outside of the pressure relief port 121 and the negative pressure port 122, and the valves are used to open / close the pressure relief port 121 and the negative pressure port 122.

[0059] The negative pressure device is used to generate negative pressure, and the negative pressure generating port of the negative pressure device is connected to the negative pressure chamber through a valve at the negative pressure port 122 .

[0060] The forming mold 20 is located in the negative pressure chamber, and the forming mold 20 includes an elastic module (upper mold base 21, guide rod 22, buffer spring 23), a punch 24, and a die 25; Figure 2 , Figure 3 , the vacuum insulation bag 00 filled with foamed polystyrene particles can be placed in the cavity of the concave mold 25, and the open end of the vacuum insulation bag 00 leaks out of the cavity of the concave mold 25; the elastic module is located in the negative pressure chamber and is fixedly connected to the negative pressure chamber upper seat 11, the male mold 24 is connected to the elastic module, and the concave mold 25 is located in the negative pressure chamber and is fixedly connected to the negative pressure chamber lower seat 12;

[0061] Among them, after the negative pressure chamber upper seat 11 and the negative pressure chamber lower seat 12 are assembled, the valve and the negative pressure device at the negative pressure port 122 are opened. During the process of evacuating the vacuum insulation bag in the die 25, the elastic force of the elastic module always maintains the punch 24 and the die 25 to jointly flatten the opposite sides of the vacuum insulation bag.

[0062] Working principle: (1) The vacuum insulation bag contains foamed polystyrene particles; (2) The vacuum insulation bag containing foamed polystyrene particles can be placed in the concave cavity of the concave mold 25; (3) The negative pressure chamber upper seat 11 and the negative pressure chamber lower seat 12 are assembled; (4) The valve at the pressure relief port is closed; the valve and negative pressure device at the negative pressure port 122 are opened to form negative pressure in the negative pressure chamber; and the gas in the vacuum insulation bag is extracted at the same time. (5) After the vacuum is completed, one side of the vacuum insulation bag is opened and sealed.

[0063] To summarize, after the negative pressure chamber upper seat 11 and the negative pressure chamber lower seat 12 are assembled, the valve and the negative pressure device at the negative pressure port 122 are opened, and during the process of evacuating the vacuum insulation bag in the die 25, the elastic module always maintains the punch 24 and the die 25 to jointly flatten the opposite sides of the vacuum insulation bag, and finally a vacuum insulation board with flat sides is obtained, and the current process of "preparing the foamed polystyrene particles into boards" is saved.

[0064] Furthermore, the elastic module includes an upper mold base 21, a guide rod 22, and a buffer spring 23; the upper mold base 21 is located in the negative pressure chamber and is fixedly connected to the negative pressure chamber upper base 11, and a plurality of guide rods 22 are fixedly arranged below the upper mold base 21, and the lower ends of the plurality of guide rods 22 slide through the punch 24, and a limiting portion is arranged at the lower end of the guide rod 22, which prevents the punch 24 from sliding off the guide rod 22; the buffer spring 23 is inserted into the outside of the guide rod 22, and the buffer spring 23 is located between the upper mold base 21 and the punch 24.

[0065] Furthermore, it also includes an electric heat sealer, the direct sealing components of which are a lower sealing seat 31 and an upper sealing seat 32, wherein the lower sealing seat 31 and the upper sealing seat 32 clamp the sealing portion of the bag and heat and seal it, the lower sealing seat 31 of the electric heat sealer is fixedly connected to the lower seat 12 of the negative pressure chamber, and the upper sealing seat 32 of the electric heat sealer is fixedly connected to the upper seat 11 of the pressure chamber;

[0066] When the upper sealing seat 32 follows the negative pressure chamber upper seat 11 to descend to the set position, the lower sealing seat 31 and the upper sealing seat 32 are clamped and close the opening of one end of the vacuum insulation bag.

[0067] Furthermore, two electric heating sealing devices 30 are provided, one of which serves as a backup device. When one electric heating sealing device 30 breaks down, the other one can be replaced. The lower sealing seat 31 and the upper sealing seat 32 of the two electric heating sealing devices 30 are arranged at the opposite ends of the vacuum insulation bag in the die 25.

[0068] For further information, see Figure 4 , further comprising a frame 40 and a lifting device 50;

[0069] The frame 40 is fixedly provided with a negative pressure chamber lower seat 12, the negative pressure chamber upper seat 11 is located above the negative pressure chamber lower seat 12, and the negative pressure chamber upper seat 11 is connected to the frame 40 in an up-and-down sliding manner;

[0070] The lifting device 50 is installed on the frame 40 , and the lifting device 50 is used to drive the negative pressure chamber upper seat 11 so that the negative pressure chamber upper seat 11 and the negative pressure chamber lower seat 12 are spliced ​​or opened.

[0071] Further, the PLC controller controls the lifting device 50 to move upward and downward through the solenoid valve C;

[0072] The PLC controller controls the electric heating sealing device 30 to start / stop heating through the relay B;

[0073] The PLC controller controls the start and stop of the negative pressure equipment through relay C;

[0074] The valves of the pressure relief port 121 and the negative pressure port 122 are solenoid valve A and solenoid valve B; the PLC controller controls the on / off of the pressure relief port 121 and the negative pressure port 122 through the solenoid valve A and the solenoid valve B respectively.

[0075] The detection end of the pressure sensor is located in the negative pressure container 10 and is used to detect the pressure of the negative pressure chamber.

[0076] The working principle is: the vacuum insulation bag is filled with foamed polystyrene particles; the vacuum insulation bag filled with foamed polystyrene particles can be placed in the concave cavity of the die 25; the PLC controller controls the lifting device 50 to move downward through the solenoid valve C, so as to achieve the purpose of splicing the negative pressure chamber upper seat 11 and the negative pressure chamber lower seat 12; the PLC controller controls the pressure relief port 121 to be closed through the solenoid valve A, and controls the negative pressure port 122 to be in a connected state through the solenoid valve B; the PLC controller controls the negative pressure equipment to start through the relay C, and the negative pressure equipment performs the vacuum process; when the pressure sensor detects that the pressure in the negative pressure container 10 reaches the set pressure, the negative pressure equipment is stopped; the PLC controller starts the electric heating sealing device 30 through the relay B, and the electric heating sealing device 30 completes the sealing of the vacuum insulation bag, and then closes the electric heating sealing device 30.

[0077] The PLC controller stops the negative pressure equipment through relay C, opens the pressure relief port 121 through solenoid valve A, and releases the pressure in the negative pressure chamber; closes the electric heating sealing device 30 through relay B, and allows the lifting device 50 to open the negative pressure container 10 through solenoid valve C.

[0078] Furthermore, the lifting device 50 is a linear drive device, specifically a hydraulic cylinder or a pneumatic cylinder.

[0079] Furthermore, the upper sealing seat 32 is fixedly connected to the negative pressure chamber lower seat 12 via a servo lifting device 33 , and the servo lifting device 33 can lift the lower sealing seat 31 .

[0080] The servo lifting device 33 is electrically connected to the PLC controller, and the PLC controller controls the lifting action of the servo lifting device 33 .

[0081] When the pressure sensor detects that the pressure in the negative pressure container 10 reaches the set pressure, the negative pressure equipment is stopped; the PLC controller starts the electric heating sealing device 30 through relay B, controls the servo lifting device 33 to clamp the upper sealing seat 32 and the lower sealing seat 31 and complete the sealing of the vacuum insulation bag, and then turns off the electric heating sealing device 30.

[0082] See also Figure 6 A punch counterweight 241 is provided on the upper side of the punch 24. The punch counterweight 241 is a vibrator. The PLC controller controls the start and stop of the vibrator through a relay D to better level the particles in the vacuum bag.

[0083] The above description is only a preferred embodiment of the present utility model patent and is not intended to limit the present utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model patent shall be included in the protection scope of the present utility model patent.

Claims

1. Automatic shaping and packaging equipment for preparing vacuum insulation boards, characterized in that: include: A negative pressure container, comprising a negative pressure chamber upper seat and a negative pressure chamber lower seat; wherein, after the negative pressure chamber upper seat and the negative pressure chamber lower seat are assembled, the two together enclose a closed negative pressure chamber; the negative pressure chamber lower seat is provided with a pressure relief port and a negative pressure port, the pressure relief port and the negative pressure port are connected with the negative pressure chamber; valves are installed on the outer sides of the pressure relief port and the negative pressure port, and the valves are used to open / close the pressure relief port and the negative pressure port; A negative pressure device, which is used to generate negative pressure, wherein the negative pressure generating port of the negative pressure device is connected to the negative pressure chamber via a valve at the negative pressure port; A molding die, which is located in the negative pressure chamber, and includes an elastic module, a male die, and a female die; the elastic module is located in the negative pressure chamber and is fixedly connected to the upper seat of the negative pressure chamber, the male die is connected to the elastic module, and the female die is located in the negative pressure chamber and is fixedly connected to the lower seat of the negative pressure chamber; Among them, after the upper seat of the negative pressure chamber and the lower seat of the negative pressure chamber are assembled, the valve and the negative pressure device at the negative pressure port are opened. During the process of evacuating the vacuum insulation bag in the die, the elastic force of the elastic module always maintains the punch and the die to flatten the opposite sides of the vacuum insulation bag.

2. The automatic shaping and packaging equipment for preparing the vacuum insulation board according to claim 1, characterized in that: A rubber layer is installed on the splicing contact surface of the negative pressure chamber lower seat with the negative pressure chamber upper seat, and the rubber layer is used to improve the sealing performance between the splicing contact surface of the negative pressure chamber lower seat and the negative pressure chamber upper seat.

3. The automatic shaping and packaging equipment for preparing the vacuum insulation board according to claim 2, characterized in that: The elastic module includes an upper die seat, a guide rod, and a buffer spring; the upper die seat is located in the negative pressure chamber and is fixedly connected to the upper seat of the negative pressure chamber, and a plurality of guide rods are fixedly arranged below the upper die seat, the lower ends of the plurality of guide rods slide through the punch, and a limiting portion is arranged at the lower end of the guide rod, which prevents the punch from sliding off the guide rod; the buffer spring is sleeved on the outside of the guide rod, and the buffer spring is located between the upper die seat and the punch.

4. The automatic shaping and packaging equipment for preparing the vacuum insulation board according to claim 3, characterized in that: It also includes an electric heat sealer, the direct sealing components of which are a lower sealing seat and an upper sealing seat, wherein the lower sealing seat and the upper sealing seat clamp the sealing portion of the bag and then heat and seal it, the lower sealing seat of the electric heat sealer is fixedly connected to the lower seat of the negative pressure chamber, and the upper sealing seat of the electric heat sealer is fixedly connected to the upper seat of the pressure chamber; When the upper sealing seat follows the negative pressure chamber upper seat and descends to a set position, the lower sealing seat and the upper sealing seat are clamped and close the opening of one end of the vacuum insulation bag.

5. The automatic shaping and packaging equipment for preparing the vacuum insulation board according to claim 4, characterized in that: Two electric heating sealing devices are provided, one of which is used as a standby device; the lower sealing seat and the upper sealing seat of the two electric heating sealing devices are arranged at the opposite ends of the vacuum insulation bag in the concave mold.

6. The automatic shaping and packaging equipment for preparing the vacuum insulation board according to claim 2, characterized in that: It also includes a rack and a lifting device; The frame is fixedly provided with a negative pressure chamber lower seat, the negative pressure chamber upper seat is located above the negative pressure chamber lower seat, and the negative pressure chamber upper seat is connected to the frame in an up-and-down sliding manner; The lifting device is installed on the frame, and the lifting device is used to drive the negative pressure chamber upper seat so that the negative pressure chamber upper seat and the negative pressure chamber lower seat are spliced ​​or opened.

7. The automatic shaping and packaging equipment for preparing the vacuum insulation board according to claim 2, characterized in that: The PLC controller controls the lifting device to move upward and downward through the solenoid valve C; The PLC controller controls the electric heating sealing device to start / stop heating through relay B; The PLC controller controls the start and stop of the negative pressure equipment through relay C; The valves of the pressure relief port and the negative pressure port are solenoid valve A and solenoid valve B; the PLC controller controls the on / off of the pressure relief port and the negative pressure port respectively through the solenoid valve A and the solenoid valve B; The detection end of the pressure sensor is located in the negative pressure container, and is used to detect the pressure of the negative pressure chamber.

8. The automatic shaping and packaging equipment for preparing the vacuum insulation board according to claim 2, characterized in that: A punch counterweight is provided on the upper side of the punch. The punch counterweight is a vibrator. The PLC controller controls the start and stop of the vibrator through a relay D to better level the particles in the vacuum bag.

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