CN113212846A - Portable sealing machine and sealing method thereof - Google Patents
Portable sealing machine and sealing method thereof Download PDFInfo
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- CN113212846A CN113212846A CN202110578812.4A CN202110578812A CN113212846A CN 113212846 A CN113212846 A CN 113212846A CN 202110578812 A CN202110578812 A CN 202110578812A CN 113212846 A CN113212846 A CN 113212846A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
- B65B31/06—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzle being arranged for insertion into, and withdrawal from, the mouth of a filled container and operating in conjunction with means for sealing the container mouth
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
- B65B51/10—Applying or generating heat or pressure or combinations thereof
- B65B2051/105—Heat seal temperature control
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Abstract
The invention provides a portable sealing machine and a sealing method thereof, wherein the sealing method comprises the following steps: s1, monitoring whether a heating instruction is received or not after starting up; s2, after receiving a heating instruction, heating the heating unit according to a preset heating time length; s3, continuously monitoring whether a heating instruction is received; s4, after the heating instruction is received again, selecting a heating control curve corresponding to the heating instruction according to the accumulated times of heating; s5, obtaining target heating duration according to the time difference between two adjacent times of heating and the selected heating control curve; s6, the heating unit is heated according to the target heating time length and then the S3 is returned. The target heating duration is obtained through the preset heating control curve and the time difference between two adjacent times of heating, and the introduction of the measurement deviation of the temperature sensor is avoided, so that the heating precision of temperature control is improved, the heat-sealing quality is improved, the control process is simple, the calculation amount is small, the improvement of the corresponding control speed is facilitated, and the hardware requirement is reduced.
Description
Technical Field
The invention relates to a sealing machine, in particular to a portable sealing machine.
Background
Because food is easy to decay in an aerobic environment, the food is reduced to be in contact with oxygen in the air in a vacuumizing mode, so that the effect of preservation can be achieved, and the sealing machine can be operated at the same time. Early sealers were large industrial machines, and later small portable sealers were developed. The mode of capper for treating the plastic bag exhaust of sealing is manual or electronic evacuation usually, and during the evacuation, the sealing ring of the upper and lower lid of capper makes the plastic bag after exhausting seal the sack circle like wherein with present portable capper in step mainly through the mode of hot melt, and the heat time short leads to sealing the incompleteness and gas leakage easily, and the heat time overlength leads to the sack easily to be fused, also the condition of gas leakage appears easily. Since the heating unit generally includes a heating wire and a heat conductor, the heating wire is located inside the heat conductor, and the outer side surface of the heat conductor directly faces the plastic bag to be heat-sealed as the working surface. The heat emitted from the heating wire is transferred from the inner side of the heat conductor to the outer side of the heat conductor, and there is a certain degree of heat loss and delay. Due to the limitations of construction space and cost, the temperature sensor of the portable capper is disposed inside the heat conductor, which results in the temperature sensor not being able to accurately measure the actual operating temperature of the working surface of the heat conductor, and this measurement deviation causes a control deviation, resulting in poor heat sealing.
Description of the invention
A first object of the present invention is to provide a heat sealing method that avoids measurement variations of a temperature sensor.
In order to achieve the above object, the sealing method of the portable sealing machine of the present invention comprises the steps of:
s1, monitoring whether a heating instruction is received or not after starting up;
s2, after receiving a heating instruction, heating the heating unit according to a preset heating time length;
s3, continuously monitoring whether a heating instruction is received;
s4, after the heating instruction is received again, selecting a heating control curve corresponding to the heating instruction according to the accumulated times of heating;
s5, obtaining target heating duration according to the time difference between two adjacent times of heating and the selected heating control curve;
s6, the heating unit is heated according to the target heating time length and then the S3 is returned.
The target heating duration is obtained through the preset heating control curve and the time difference between two adjacent times of heating, and the introduction of the measurement deviation of the temperature sensor is avoided, so that the heating precision of temperature control is improved, the heat-sealing quality is improved, the control process is simple, the calculation amount is small, the improvement of the corresponding control speed is facilitated, and the hardware requirement is reduced. The preset heating control curve is manufactured by testing and measuring through repeated experiments, and the optimal sealing effect is used as a judgment standard for selecting the target heating time length.
Further, when the time difference between two adjacent heating times is within the predetermined interval, the heating control curve is a non-decreasing function with respect to the time difference and the target heating time period. Thus being beneficial to fully utilizing the waste heat of the previous heating and preventing the sealing from being scalded by overheating.
Further, when the time difference between two adjacent heating times exceeds the upper limit of the preset interval, the preset heating time is used as the target heating time. The method is beneficial to simplifying the heating control function, simplifying the control process and reducing the performance requirement of the storage unit.
Furthermore, when the time difference between two adjacent heating times is constant, the cumulative times of heating and the target heating time growth are in a non-increasing functional relationship. Thus being beneficial to further fully utilizing the waste heat of the previous heating and preventing the sealing from being scalded by overheating.
Furthermore, the preset interval is divided into preset sub-intervals, interval division density of time difference between two adjacent heating times and time length of the time difference form a non-increasing function relationship, and the target heating time length corresponding to each sub-interval is a preset constant. Thus, the control precision of heating is improved, the heat sealing quality is improved, the failure rate is reduced, and the hardware performance requirement is reduced.
Further, the portable sealing machine is a vacuum-pumping heat sealing machine, the preset heating time is divided into a first preset heating time and a second preset heating time, the first preset heating time is shorter than the second preset heating time, when in heat sealing, if the vacuum degree reaches a preset value, the heating unit is heated according to the first preset heating time, otherwise, the heating unit is heated according to the second preset heating time. The sealing closing pressure is increased during vacuum pumping, the heat energy loss is reduced, and relatively short heating time can be used; when heat sealing is performed without vacuum pumping, the heating time of the heat seal is relatively increased. This is advantageous for saving heat energy and improving heat sealing quality.
Further, if the vacuum pumping is started before the heat sealing, the vacuum pumping is stopped after the heat sealing is completed. This is advantageous in that the closing pressure of the heat seal can be continuously increased, the reliability of the heat seal can be improved, and heat energy can be saved.
Another object of the present invention is to provide a portable capper having a storage unit, an instruction input unit, a control unit, an execution unit, and a heat generating unit. The storage unit stores a heating control curve corresponding to the accumulated heating times, the instruction input unit is used for receiving a heating instruction and sending the heating instruction to the control unit, and the control unit receives the heating instruction and sends the target heating time length serving as a heating instruction to the execution unit. After starting up, if a heating instruction is received for the first time, the control unit takes the preset heating time as a target heating time; after the machine is started, if a heating instruction is not received for the first time, the control unit obtains a heating control curve corresponding to the accumulated heating times from the storage unit, and obtains a target heating duration according to the time difference between two adjacent times of heating and the selected heating control curve. The execution unit receives the heating instruction and outputs current to the heating unit according to the heating instruction.
The target heating duration is obtained through the preset heating control curve and the time difference between two adjacent times of heating, and the introduction of the measurement deviation of the temperature sensor is avoided, so that the heating precision of temperature control is improved, the heat-sealing quality is improved, the control process is simple, the calculation amount is small, the improvement of the corresponding control speed is facilitated, and the hardware requirement is reduced.
Further, when the time difference is within the preset interval, the heating control curve is a non-decreasing function of the time difference of two adjacent heating times and the target heating time, and when the time difference exceeds the upper limit of the preset interval, the preset heating time is taken as the target heating time. Thus being beneficial to fully utilizing the waste heat of the previous heating and preventing the sealing from being scalded by overheating.
Furthermore, the portable sealing machine comprises a base body and a cover body hinged on the base body. The execution unit is arranged on the base body and is electrically connected with the control unit. The heating unit is arranged on the base body and is electrically connected with the execution unit. The vacuumizing unit is arranged on the base body and is electrically connected with the control unit. The concave cavity is arranged on one side, facing the cover body, of the base body, and when the cover body is buckled with the base body, the concave cavity and the cover body jointly form a negative pressure cavity. An air exhaust hole is arranged in the concave cavity, and the vacuumizing unit is communicated with the concave cavity through a pipeline and the air exhaust hole. A heat insulation piece is arranged between the heating unit and the shell of the seat body, and a heat-resistant layer is arranged on one side of the heating unit facing the cover body. Main parts are arranged on the base body, and no electric appliance element is arranged on the cover body, so that the circuit component is simplified, and the reliability of an electric appliance is improved.
Drawings
FIG. 1 is a system block diagram of a portable capper;
FIG. 2 is a perspective view of the portable sealer when the cover is engaged;
FIG. 3 is a perspective view of the portable sealer with the cover open;
FIG. 4 is a flowchart of the operation of a first embodiment of a sealing method of a portable sealing machine;
FIG. 5 is a flowchart of the operation of a second embodiment of a sealing method of the portable sealing machine;
FIG. 6 is an embodiment of a temperature control curve for a prior evacuated and then heat sealed condition;
fig. 7 is a specific embodiment of a temperature control curve without vacuum direct heat sealing.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Embodiment of a Portable capper
As shown in fig. 1, the portable capper 100 includes a storage unit 111, an instruction input unit 112, a control unit 113, an execution unit 114, and a heat generation unit 115. The control unit 113 is electrically connected to the storage unit 111, the instruction input unit 112, and the execution unit 114 is electrically connected to the heat generation unit 115. The storage unit 111 stores a heating control curve corresponding to the accumulated number of times of heating, the instruction input unit 112 is configured to receive a heating instruction and send the heating instruction to the control unit 113, and the control unit 113 receives the heating instruction and sends a target heating time period as a heating instruction to the execution unit 114. After the computer is started, if a heating instruction is received for the first time, the control unit 113 takes the preset heating time as a target heating time; after the computer is started, if a heating instruction is not received for the first time, the control unit 113 obtains a heating control curve corresponding to the cumulative number of times of heating from the storage unit 111, and obtains a target heating duration according to the time difference between two adjacent times of heating and the selected heating control curve. Execution unit 114 receives the firing instructions and outputs current to firing unit 115 according to the firing instructions.
As a modification, the portable capper 100 further comprises an evacuation unit 116, and the evacuation unit 116 is electrically connected to the control unit 113.
As an improvement, when the time difference is within a predetermined interval, the heating control curve is a non-decreasing function of the time difference between two adjacent heats and the target heating time length, and when the time difference exceeds the upper limit of the predetermined interval, the predetermined heating time length is taken as the target heating time length.
As shown in fig. 2 and 3, the portable sealing machine 100 includes a base 10 and a cover 20 hinged to the base 10. An actuator unit (not shown) is provided on the housing 10. The heat generating unit 115 is disposed on the housing 10. A vacuum pumping unit (not shown) is provided on the housing 10. The concave cavity 117 is disposed on one side of the seat body 10 facing the cover body 20, and when the cover body 20 is fastened to the seat body 10, the concave cavity 117 and the cover body 20 together form a negative pressure cavity. A suction hole 118 is provided in the cavity 117, and the vacuum unit communicates with the cavity 117 through a pipe (not shown) and the suction hole 118. A heat insulation member (not shown) is disposed between the heat generating unit 115 and the housing of the base 10, and a heat resistant layer 119 is disposed on a side of the heat generating unit facing the cover 20. The main components of the portable sealing machine 100 are all disposed on the base 10, and no electrical components are disposed on the cover 20, which is beneficial to simplifying circuit components and improving reliability of electrical appliances.
The base 10 is provided with a vacuumizing button 11 for inputting instructions, a sealing button 12, a dry-wet mode switching button 13 and an automatic sealing button 14.
The vacuumizing button 11 is used for inputting a vacuumizing instruction and canceling the vacuumizing instruction. When the portable sealing machine 100 is in an idle state, a vacuumizing instruction can be input by pressing the vacuumizing button 11; when the portable sealing machine 100 is in the vacuum state, pressing the vacuum button 11 can input a command to stop vacuum.
The sealing button 12 is used for inputting a heating instruction and canceling the heating instruction. When the portable sealing machine 100 is in an idle state, the sealing key 12 is pressed to input a heating instruction; pressing the sealing key 12 when the portable sealing machine 100 is in the heating state can input a cancel heating instruction.
The dry and wet mode switching button 13 is used for inputting a dry and wet mode switching instruction. The dry mode is used when the article to be sealed is a dry article, and the wet mode is used when the article to be sealed is a wet article. The two modes differ in that the evacuation takes longer in the wet mode than in the dry mode.
The automatic sealing button 14 is used for inputting a vacuumizing and heating instruction and a termination instruction. When the portable sealing machine 100 is in an idle state, the automatic sealing button 14 is pressed to input a vacuumizing instruction and a heating instruction; when the portable capper 100 is in any operating state, pressing the auto-seal button 14 may input a termination command to return the portable capper 100 to the idle state. Any operating condition described herein includes a single vacuum pumping operating condition, a single heating operating condition, and a vacuum pumping and simultaneous heating operating condition.
The sealing key 12 and the automatic sealing key 14 can be used as an instruction input unit 112 for inputting a heating instruction.
The portable sealing machine 100 is in an idle state after being powered on, waits for instruction input, and enters a shutdown state after being powered off. The portable sealing machine 100 can be powered on and off through a special power switch key; or the power socket can be plugged in by the plug for electrifying without using a special switch key, and the plug can be pulled out from the power socket for powering off.
The cover 20 is also preferably provided with a cavity 121, a negative pressure cavity, and sealing rings 122 respectively disposed on the seat body 10 and the cover 20. The sealing ring 122 is typically made of an elastomeric material to increase sealing performance.
Sealing method of portable sealing machine
The sealing method of the portable sealing machine comprises the following steps:
s1, monitoring whether a heating instruction is received or not after starting up;
s2, after receiving a heating instruction, heating the heating unit according to a preset heating time length;
s3, continuously monitoring whether a heating instruction is received;
s4, after the heating instruction is received again, selecting a heating control curve corresponding to the heating instruction according to the accumulated times of heating;
s5, obtaining target heating duration according to the time difference between two adjacent times of heating and the selected heating control curve;
s6, the heating unit is heated according to the target heating time length and then the S3 is returned.
The target heating duration is obtained through the preset heating control curve and the time difference between two adjacent times of heating, and the introduction of the measurement deviation of the temperature sensor is avoided, so that the heating precision of temperature control is improved, the heat-sealing quality is improved, the control process is simple, the calculation amount is small, the improvement of the corresponding control speed is facilitated, and the hardware requirement is reduced.
The preset heating control curve is manufactured by testing and measuring through repeated experiments, and the optimal sealing effect is used as a judgment standard for selecting the target heating time length. For example, a cold start-up is repeated, and heat seal tests of 1.5 seconds, 2 seconds, … … seconds and 18 seconds are performed in a non-vacuumized state, and 16 seconds with the best sealing effect are used as the predetermined heating time period. For another example, when the time difference between two adjacent heat seals is 10 seconds, the second heat seal is performed, and the heat seal tests of 5 seconds, 5.5 seconds, 6 seconds, … … seconds and 14 seconds are respectively performed, and 10 seconds with the best sealing effect is taken as the target heating time length. And repeatedly and iteratively testing the accumulated times of the heat seal and the time difference between two adjacent heat seals to determine each heating control curve corresponding to the accumulated times of heating.
As an improvement, when the time difference between two adjacent heats is within a predetermined interval, the heating control curve is a non-decreasing function with respect to the time difference and the target heating time period.
As an improvement, when the time difference between two adjacent heating exceeds the upper limit of the preset interval, the preset heating time period is used as the target heating time period.
As an improvement, when the time difference between two adjacent heating times is constant, the accumulated times of heating and the target heating time growth are in a non-increasing function relationship.
As an improvement, the preset interval is divided into preset sub-intervals, the interval division density of the time difference between two adjacent times of heating and the time length of the time difference form a non-increasing function relationship, and the target heating time length corresponding to each sub-interval is a preset constant.
Sealing method of portable sealing machine
The difference between the present embodiment and the first embodiment of the sealing method of the portable sealing machine is that the heating time length can be finely controlled according to whether vacuum is pumped or not.
The portable sealing machine is a vacuum-pumping heat sealing machine, the preset heating time is divided into a first preset heating time and a second preset heating time, the first preset heating time is shorter than the second preset heating time, during heat sealing, if the vacuum degree reaches a preset value, the heating unit is heated according to the first preset heating time, otherwise, the heating unit is heated according to the second preset heating time.
As a modification, if the evacuation is started before the heat-sealing, the evacuation is stopped after the heat-sealing is completed.
Fig. 6 illustrates an embodiment of a temperature control curve in the case of a vacuum first and then a heat seal. In this embodiment, when the automatic sealing button 14 inputs a vacuum-pumping heating instruction, the portable sealing machine starts vacuum-pumping first, the heating unit starts to operate when the vacuum degree reaches a predetermined value, and the vacuum-pumping is stopped after the heating unit finishes heating.
12 seconds as the first predetermined heating period. When the time difference between two adjacent heating times is within a predetermined interval of 0 to 100 seconds, the heating control curve is a non-decreasing function of the time difference and the target heating time period. When the time difference between two adjacent heating exceeds the preset interval upper limit of 100 seconds, 12 seconds are taken as the target heating time length.
When the number of times of heating is a natural number of 5 or more, the heating times are all regarded as the Nth time, and the target heating time length corresponding to the time difference between the Nth time and the two adjacent times of heating is executed during heating.
When the time difference between two adjacent heating times is constant, the cumulative times of heating and the target heating time growth are in a non-increasing functional relationship.
The preset interval of 0 to 100 seconds is divided into 5 preset subintervals, and the interval division density of the time difference of two adjacent heating times and the time growth of the time difference are in a non-increasing function relationship. For example, the time difference first interval span "0 <. DELTA.T.ltoreq.10" is 10 seconds, the time difference second interval span "10 <. DELTA.T.ltoreq.20" is 10 seconds, the time difference third interval span "20 <. DELTA.T.ltoreq.40" is 20 seconds, the time difference fourth interval span "40 <. DELTA.T.ltoreq.60" is 20 seconds, and the time difference fourth interval span "60 <. DELTA.T.ltoreq.100" is 40 seconds. As the time difference between two adjacent heating times is increased, the interval span of the time difference is only increased and not decreased, namely, the interval division density of the time difference is only decreased and not increased. The target heating time corresponding to the heating times and the time difference between two adjacent times of heating is a preset constant.
Fig. 7 illustrates a specific embodiment of a temperature control curve without vacuum direct heat sealing. In this embodiment, when the heating command is input through the sealing button 14, the portable sealing machine directly executes the heating command for sealing without vacuuming.
16 seconds as the second predetermined heating period. When the time difference between two adjacent heating times is within a predetermined interval of 0 to 100 seconds, the heating control curve is a non-decreasing function of the time difference and the target heating time period. When the time difference between two adjacent heating times is greater than 100 seconds, 16 seconds are taken as the target heating time length.
When the number of times of heating is a natural number of 5 or more, all the times are regarded as the Nth time, and the heating time length corresponding to the time difference between the Nth time and the two adjacent times of heating is executed during heating.
When the time difference between two adjacent heating times is constant, the cumulative times of heating and the target heating time growth are in a non-increasing functional relationship.
The preset interval of 0 to 100 seconds is divided into 5 preset subintervals, and the interval division density of the time difference of two adjacent heating times and the time growth of the time difference are in a non-increasing function relationship. The target heating time corresponding to the heating times and the time difference between two adjacent times of heating is a preset constant.
Obviously, the second predetermined heating period is greater than the first predetermined heating period.
The present invention has been described in detail with reference to specific embodiments, and it should not be construed that the embodiments of the present invention are limited to the description. For those skilled in the art to which the invention pertains, several equivalent substitutions or obvious modifications, which are equivalent in performance or use, without departing from the inventive concept, should be considered as falling within the scope of the present invention as defined by the appended claims.
Claims (10)
1. The sealing method of the portable sealing machine is characterized by comprising the following steps:
s1, monitoring whether a heating instruction is received or not after starting up;
s2, after receiving a heating instruction, heating the heating unit according to a preset heating time length;
s3, continuously monitoring whether a heating instruction is received;
s4, after the heating instruction is received again, selecting a heating control curve corresponding to the heating instruction according to the accumulated times of heating;
s5, obtaining target heating duration according to the time difference between two adjacent times of heating and the selected heating control curve;
and S6, heating the heating unit according to the target heating time length, and returning to S3.
2. A sealing method according to claim 1, wherein:
the heating control curve is a non-decreasing function with respect to the time difference and the target heating period when the time difference is within a predetermined interval.
3. A sealing method according to claim 2, wherein:
and when the time difference exceeds the upper limit of the preset interval, taking the preset heating time as the target heating time.
4. A sealing method according to claim 2, wherein:
when the time difference is constant, the accumulated times of heating and the target heating time growth form a non-increasing function relationship.
5. A sealing method according to any one of claims 2 to 4, wherein:
the preset interval is divided into preset sub-intervals, and interval division density of the time difference and time length of the time difference form a non-increasing function relationship;
the target heating time length corresponding to each subinterval is a preset constant.
6. A sealing method according to any one of claims 2 to 4, wherein:
the portable sealing machine is a vacuum-pumping heat sealing machine;
the preset heating time is divided into a first preset heating time and a second preset heating time;
the first predetermined heating period is less than the second predetermined heating period;
and during heat sealing, if the vacuum degree reaches a preset value, heating the heating unit according to the first preset heating time, otherwise, heating the heating unit according to the second preset heating time.
7. A sealing method according to any one of claims 2 to 4, wherein:
and if the vacuumizing is started before the heat sealing, stopping the vacuumizing after the heat sealing is finished.
8. Portable capper has memory cell, instruction input unit, the control unit, the execution unit and generates heat the unit, its characterized in that:
the storage unit stores a heating control curve corresponding to the accumulated heating times;
the instruction input unit is used for receiving a heating instruction and sending the heating instruction to the control unit;
the control unit receives the heating instruction and sends a target heating time length serving as a heating instruction to the execution unit;
after starting up, if a heating instruction is received for the first time, the control unit takes the preset heating time as the target heating time;
after starting up, if a heating instruction is not received for the first time, the control unit acquires the heating control curve corresponding to the accumulated heating times from the storage unit, and obtains the target heating duration according to the time difference between two adjacent times of heating and the selected heating control curve;
and the execution unit receives the heating instruction and outputs current to the heating unit according to the heating instruction.
9. The portable capper of claim 8 wherein: when the time difference is within a predetermined interval, the heating control curve is a non-decreasing function of the time difference and the target heating time length;
and when the time difference exceeds the upper limit of the preset interval, taking the preset heating time as the target heating time.
10. The portable sealing machine of any one of claims 8 to 9, which comprises a base body and a cover body hinged on the base body, and is characterized in that:
the execution unit is arranged on the seat body and is electrically connected with the control unit;
the heating unit is arranged on the seat body and is electrically connected with the execution unit;
the vacuumizing unit is arranged on the seat body and is electrically connected with the control unit;
the concave cavity is arranged on one side, facing the cover body, of the seat body, and when the cover body is buckled with the seat body, the concave cavity and the cover body jointly form a negative pressure cavity;
an air suction hole is formed in the concave cavity, and the vacuumizing unit is communicated with the concave cavity through a pipeline and the air suction hole;
a heat insulation piece is arranged between the heating unit and the shell of the seat body;
and a heat-resistant layer is arranged on one side of the heating unit facing the cover body.
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| CN202110578812.4A CN113212846B (en) | 2021-05-26 | 2021-05-26 | Portable sealing machine and sealing method thereof |
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| CN202110578812.4A CN113212846B (en) | 2021-05-26 | 2021-05-26 | Portable sealing machine and sealing method thereof |
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| CN113212846B CN113212846B (en) | 2022-11-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114309599A (en) * | 2021-12-30 | 2022-04-12 | 江西开源自动化设备有限公司 | Magnetic field press equipment |
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