Melt-blowing die head with heating and heat preservation functions
By setting up an oil heating and insulation layer inside the meltblown die head, combined with a temperature sensor and a controller, the problem of temperature instability of the traditional die head is solved, efficient heating and insulation is achieved, and product quality and production efficiency are improved.
Patent Information
- Application Number
- CN202420868563.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-25
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-04-25
AI Technical Summary
Due to the large temperature difference between the surface temperature and the surrounding environment of the traditional meltblown die head, the temperature of the die head changes rapidly, affecting product quality and production efficiency. The heating method of electric heating wire or electric heating sheet is high and the temperature control accuracy is difficult to ensure.
The die head design adopts oil heating and insulation layer. By setting thermal oil and heating elements inside the mold, the thermal conductivity of the oil can be used to achieve uniform heating and insulation of the mold, and precise temperature control is carried out in combination with a temperature sensor and a controller.
The stable control of die temperature is achieved, the quality and production efficiency of meltblown products are improved, energy consumption is reduced, and the temperature in different areas of the die is able to be accurately controlled.
Smart Images
Figure CN222613555U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a melt-blowing die head with heating and heat-insulating functions, in particular to a die head adopting oil heating and heat-insulating, which is suitable for a melt-blowing production process requiring segmented and precise temperature control. Background Art
[0002] The meltblown die is one of the key equipment in the production process of meltblown cloth. Meltblown cloth is a nonwoven fabric that is widely used in medical and health care, protective clothing, filter materials and other fields. The main function of the meltblown die is to spin the molten polymer into fibers to form meltblown cloth.
[0003] In the production process of meltblown cloth, it is very important to maintain different temperatures and temperature stability in each area of the meltblown die. If the temperature of the die is too high or too low, it will affect the formation of meltblown fibers and the quality of the cloth. Therefore, a meltblown die with heating and heat preservation function can ensure that the die maintains a stable temperature during operation, thereby improving the production efficiency and product quality of the meltblown cloth.
[0004] The traditional meltblown die head has a large temperature difference between the surface temperature and the surrounding environment, which easily causes the temperature of the die head to change rapidly, affecting the quality and production efficiency of the product. In order to maintain a constant temperature of the die head, the traditional method usually uses heating elements such as electric heating wires or electric heating plates for heating, but this method has high energy consumption and the temperature control accuracy is difficult to guarantee. Therefore, it is particularly important to develop a die head technology with efficient heating and heat preservation performance and easy temperature control.
[0005] The utility model aims to solve the above-mentioned deficiencies and provide a meltblown die head with heating and heat preservation functions. By arranging an oil heating and heat preservation layer inside the mold and utilizing the thermal conductivity of the oil, uniform heating and heat preservation of the mold are achieved, thereby improving the quality and production efficiency of the meltblown products. Utility Model Content
[0006] A meltblown die head with heating and heat preservation function is realized by adopting the following technical scheme:
[0007] A meltblown die with heating and heat preservation function comprises a die body, a die insulation oil container, a die heat-conducting oil, a die heating element, a die temperature sensor, an air channel 1, an air channel 2, a hot air pipe 1, a hot air pipe 1 insulation oil container, a hot air pipe 1 heat-conducting oil, a hot air pipe 1 heating element, a hot air pipe 1 temperature sensor, a hot air pipe 2, a hot air pipe 2 insulation oil container, a hot air pipe 2 heat-conducting oil, a hot air pipe 2 heating element, a hot air pipe 2 temperature sensor and a controller.
[0008] Hot air duct one and hot air duct two are respectively installed on both sides of the meltblowing die body, air duct one is arranged between the die body and the hot air duct one, and air duct two is arranged between the die body and the hot air duct two. The hot air in the hot air duct one and the hot air duct two passes through the air duct one and the air duct two respectively, and then is ejected from the bottom of the die body.
[0009] The die head insulation oil container is located at the upper part of the die head body, the hot air pipe one insulation oil container is wrapped around the outside of the hot air pipe one, and the hot air pipe two insulation oil container is wrapped around the outside of the hot air pipe two. The die head heat-conducting oil, the hot air pipe one heat-conducting oil, and the hot air pipe two heat-conducting oil are respectively filled in the die head insulation oil container, the hot air pipe one insulation oil container, and the hot air pipe two insulation oil containers. The die head heating element, the hot air pipe one heating element, and the hot air pipe two heating elements are respectively arranged in the die head insulation oil container, the hot air pipe one insulation oil container, and the hot air pipe two insulation oil containers, and are respectively used to heat the die head heat-conducting oil, the hot air pipe one heat-conducting oil, and the hot air pipe two heat-conducting oil.
[0010] The die head temperature sensor, the hot air pipe 1 temperature sensor and the hot air pipe 2 temperature sensor are installed inside the die head body and the hot air pipe 1 and the hot air pipe 2 respectively.
[0011] During the working process, the die head heating element, the hot air pipe one heating element and the hot air pipe two heating element heat the die head heat conducting oil, the hot air pipe one heat conducting oil and the hot air pipe two heat conducting oil respectively, and the die head heat conducting oil, the hot air pipe one heat conducting oil and the hot air pipe two heat conducting oil respectively transfer the heat to the die head body and the hot air pipe one and the hot air pipe two through heat conduction, thereby achieving uniform heating and heat preservation of the die head body and the hot air pipe one and the hot air pipe two.
[0012] The upper part of the die body is provided with a plurality of die insulation oil containers, each of which is independent of each other, and each of which has an independent heating element, a temperature sensor, and heat transfer oil. Two air passages are provided inside the die body, and the two air passages are respectively connected to the hot air pipe 1 and the hot air pipe 2. After the hot air in the hot air pipe passes through the two air passages, it is ejected from the bottom of the die body.
[0013] The number of die head insulation oil containers is set according to the needs of the melt-blowing process, and the number is between 3 and 9. The heating temperature of the heating element in each die head insulation oil container is between 150 and 270° C. During heating, the heating temperature in each die head insulation oil container can be independently adjusted according to the requirements of the melt-blowing process.
[0014] Both ends of the hot air duct 1 and the hot air duct 2 installed on both sides of the die body are hot air inlets, and there are air ducts 1 and 2 that are interconnected between the hot air duct and the die body. After the hot air enters the hot air duct 1 and the hot air duct 2, it passes through the air ducts and is ejected from the bottom of the die body.
[0015] The hot air pipeline one heat preservation oil container is arranged outside the hot air pipeline one, and the hot air pipeline one heat preservation oil container is arranged with a hot air pipeline one heat transfer oil, a hot air pipeline one heating element, and a hot air pipeline one temperature sensor. The temperature heated by the hot air pipeline one heating element is between 150-170°C.
[0016] The second heat preservation oil container of the hot air pipeline is arranged outside the second hot air pipeline, and the second heat preservation oil container of the hot air pipeline is provided with the second heat conduction oil of the hot air pipeline, the second heating element of the hot air pipeline, and the second temperature sensor of the hot air pipeline. The temperature heated by the second heating element of the hot air pipeline is between 150-170°C.
[0017] The die temperature sensors are evenly distributed and installed inside the die body to detect the temperature of various parts of the die in real time.
[0018] The hot air pipe temperature sensor 1 and the hot air pipe temperature sensor 2 are respectively installed in the hot air pipe insulation oil container 1 and the hot air pipe insulation oil container 1, and are used to detect the temperature in the hot air pipe insulation oil container 1 and the hot air pipe insulation oil container 2 in real time.
[0019] The controller is programmed and controlled by a PLC programmable controller. The core lies in its precise temperature monitoring and heating element control functions. The system monitors the actual temperature of the die in real time and compares it with the preset temperature value. If the actual temperature deviates from the preset value, the controller will automatically adjust the output power of the heating element to ensure that the die temperature quickly returns to the preset value. The controller has built-in multiple safety protection functions, including overheat protection, overcurrent protection, short circuit protection, etc. Once an abnormal situation is detected, the system will immediately cut off the power supply and send an alarm signal to ensure the safety of personnel and equipment.
[0020] Working principle of a meltblown die head with heating and heat preservation function:
[0021] When a meltblown die with heating and heat preservation function is working, the die heating element in the die heat preservation oil container heats the die heat conduction oil, and the die temperature sensor detects the temperature of the die body in real time and feeds back the temperature data to the controller. The controller controls the start and stop of the die heating element according to the comparison between the temperature data and the set value, which is used to heat the heat conduction oil. The heat conduction oil transfers the heat to the die body through heat conduction to achieve uniform heating and heat preservation of the mold, thereby maintaining the temperature state of different areas of the die body within the set range. The working principle of the oil heating and heat preservation layer on the hot air duct 1 and the hot air duct 2 is the same as that of the die oil heating and heat preservation layer.
[0022] A meltblown die head with heating and heat preservation function has a reasonable design, compact structure and easy use. A meltblown die head with heating and heat preservation function adopts the method of oil heating and heat preservation, and utilizes the thermal conductivity of oil, has higher thermal efficiency, and reduces energy consumption and environmental pollution. It realizes uniform heating and heat preservation of the die body, and can accurately control the temperature of different areas of the die head at the same time, realize efficient heating and heat preservation of the die head, which can help maintain the fluidity and consistency of the polypropylene fluid in the molten state in the die head, ensure the stability and continuity of the meltblowing process, and obtain high-quality meltblown products. The die head with heat preservation function can ensure that the gram weight, resistance and texture of the meltblown cloth are uniform and consistent. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the technical solution of the utility model, the following briefly introduces the drawings required for use in the utility model. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 It is a schematic diagram of the structure of a meltblown die head with heating and heat preservation functions;
[0025] Figure 2 yes Figure 1 A CC cross-sectional view of a meltblowing die head structure with heating and heat preservation functions;
[0026] Figure 3 It is a three-dimensional schematic diagram of the external structure of a meltblown die head with heating and heat preservation functions;
[0027] Figure 4 It is a three-dimensional schematic diagram of the internal structure of a meltblown die head with heating and heat preservation functions.
[0028] In the figure: 1, hot air pipe 1, 2, die body, 21, air channel 1, 22 air channel 2, 3, hot air pipe 2, 4, die head insulation oil container, 41, die head heating element, 42, die head temperature sensor, 43, die head heat transfer oil, 5, hot air pipe 1 insulation oil container, 51, hot air pipe 1 heat transfer oil, 52, hot air pipe 1 heating element, 53, hot air pipe 1 temperature sensor, 6, hot air pipe 2 insulation oil container, 61, hot air pipe 2 heat transfer oil, 62, hot air pipe 2 heating element, 63, hot air pipe 2 temperature sensor. 7, controller. DETAILED DESCRIPTION
[0029] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0030] See attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 , Attachment Figure 4 A meltblown die with heating and heat preservation function includes a hot air pipe 1, a die body 2, an air channel 21, an air channel 22, a hot air pipe 23, a die insulation oil container 4, a die heating element 41, a die temperature sensor 42, a die heat transfer oil 43, a hot air pipe 1 insulation oil container 5, a hot air pipe 1 heat transfer oil 51, a hot air pipe 1 heating element 52, a hot air pipe 1 temperature sensor 53, a hot air pipe 2 insulation oil container 6, a hot air pipe 2 heat transfer oil 61, a hot air pipe 2 heating element 62, a hot air pipe 2 temperature sensor 63, and a controller 7.
[0031] The melt-blown die body 2 with heating and heat preservation function is provided with hot air duct 1 and hot air duct 2 3 on both sides, an air duct 1 21 is provided between the die body 2 and the hot air duct 1, and an air duct 2 22 is provided between the die body 2 and the hot air duct 2 3. The hot air in the hot air duct 1 and the hot air duct 2 3 passes through the air duct 1 21 and the air duct 2 22 respectively, and then is ejected from the bottom of the die body 2. The die body 2, the hot air duct 1, and the hot air duct 2 3 are all provided with oil heating and heat preservation layers.
[0032] The oil heating insulation layer is composed of insulation oil container 4 / 5 / 6, heat transfer oil 43 / 51 / 61, heating element 41 / 52 / 62, and temperature sensor 42 / 53 / 63. The die insulation oil container 4 is located at the upper part of the die body 2, the hot air pipe insulation oil container 5 is wrapped around the outside of the hot air pipe 1, and the hot air pipe 2 insulation oil container 6 is wrapped around the outside of the hot air pipe 2 3. The heat transfer oil 43 / 51 / 61 is filled in the insulation oil container 4 / 5 / 6 respectively, and the heating element 41 / 52 / 62 is respectively arranged inside the insulation oil container 4 / 5 / 6 for heating the heat transfer oil 43 / 51 / 61. The temperature sensor 42 / 53 / 63 is installed inside the die body 2 and the hot air pipe 1 and the hot air pipe 2 3 respectively. During operation, the heating elements 41 / 52 / 62 heat the heat transfer oil 43 / 51 / 61 respectively, and the heat transfer oil 43 / 51 / 61 transfers heat to the die body 2 and the hot air pipe 1 and the hot air pipe 2 3 through heat conduction, thereby achieving uniform heating and heat preservation of the die body 2 and the hot air pipe 1 and the hot air pipe 2 3.
[0033] The die body 2 is provided with a plurality of die insulation oil containers 4 on the upper part, each die insulation oil container 4 is independent of each other, and each die insulation oil container 4 has an independent die heating element 41, a die temperature sensor 42, and a die heat transfer oil 43. The die body 2 is provided with an air channel 1 21 and an air channel 2 22, the air channel 1 21 is connected to the hot air pipe 1 1, and the air channel 2 22 is connected to the hot air pipe 2 3. The hot air in the hot air pipe passes through the two air channels and is ejected from the bottom of the die body 2 respectively.
[0034] The number of the die insulation oil containers 4 is set according to the requirements of the melt-blowing process, and the number is between 3 and 9. The temperature of the die heating element 41 in each die insulation oil container 4 is between 150 and 270° C. During heating, the heating temperature in each die insulation oil container 4 can be independently adjusted according to the requirements of the melt-blowing process.
[0035] Both ends of the hot air pipe 1 and the hot air pipe 2 3 installed on both sides of the die body 2 are hot air inlets, and there are air channels 1 21 and air channels 2 22 that are interconnected between the hot air pipe 1 and the hot air pipe 2 3 and the die body 2. After the hot air enters the hot air pipe 1 and the hot air pipe 2 3, it passes through the air channels 1 21 and the air channels 2 22 respectively and is ejected from the bottom of the die body 2.
[0036] The hot air pipeline-insulating oil container 5 is arranged outside the hot air pipeline-1, and the hot air pipeline-insulating oil container 5 is provided with a hot air pipeline-heating oil 51, a hot air pipeline-heating element 52, and a hot air pipeline-temperature sensor 53. The temperature heated by the hot air pipeline-heating element 52 is between 150-170°C.
[0037] The hot air pipe 2 heat preservation oil container 6 is arranged outside the hot air pipe 2 3, and the hot air pipe 2 heat preservation oil container 6 is provided with hot air pipe 2 heat transfer oil 61, hot air pipe 2 heating element 62, and hot air pipe 2 temperature sensor 63. The temperature heated by the hot air pipe 2 heating element 62 is between 150-170°C.
[0038] The die temperature sensors 42 are provided in plurality and are evenly distributed and installed inside the die body 2 to detect the temperature of various parts of the die body 2 in real time.
[0039] The hot air pipe one temperature sensor 53 and the hot air pipe two temperature sensor 63 are respectively installed in the hot air pipe one insulation oil container 5 and the hot air pipe one insulation oil container 6, and are used to detect the temperature of the hot air pipe one insulation oil container 5 and the hot air pipe two insulation oil container 6 in real time.
[0040] The controller is programmed and controlled by a PLC programmable controller. The core lies in its precise temperature monitoring and heating element control functions. The system monitors the actual temperature of the die in real time and compares it with the preset temperature value. If the actual temperature deviates from the preset value, the controller will automatically adjust the output power of the heating element to ensure that the die temperature quickly returns to the preset value. The controller has built-in multiple safety protection functions, including overheat protection, overcurrent protection, short circuit protection, etc. Once an abnormal situation is detected, the system will immediately cut off the power supply and send an alarm signal to ensure the safety of personnel and equipment.
[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.
Claims
1. A meltblowing die head with heating and heat preservation function, characterized in that: It includes a die body, a die insulation oil container, a die heat-conducting oil, a die heating element, a die temperature sensor, an air channel 1, an air channel 2, a hot air pipe 1, a hot air pipe 1 insulation oil container, a hot air pipe 1 heat-conducting oil, a hot air pipe 1 heating element, a hot air pipe 1 temperature sensor, a hot air pipe 2, a hot air pipe 2 insulation oil container, a hot air pipe 2 heat-conducting oil, a hot air pipe 2 heating element, a hot air pipe 2 temperature sensor and a controller; A hot air duct 1 and a hot air duct 2 are respectively installed on both sides of the meltblowing die body, an air duct 1 is arranged between the die body and the hot air duct 1, and an air duct 2 is arranged between the die body and the hot air duct 2. The hot air in the hot air duct 1 and the hot air duct 2 passes through the air duct 1 and the air duct 2 respectively, and then is ejected from the bottom of the die body; The die head insulation oil container is located at the upper part of the die head body, the hot air pipe insulation oil container 1 is wrapped around the outside of the hot air pipe 1, and the hot air pipe 2 insulation oil container is wrapped around the outside of the hot air pipe 2. The die head heat-conducting oil, the hot air pipe 1 heat-conducting oil, and the hot air pipe 2 heat-conducting oil are respectively filled in the die head insulation oil container, the hot air pipe 1 insulation oil container, and the hot air pipe 2 insulation oil container, and the die head heating element, the hot air pipe 1 heating element, and the hot air pipe 2 heating element are respectively arranged in the die head insulation oil container, the hot air pipe 1 insulation oil container, and the hot air pipe 2 insulation oil container, and are used to heat the die head heat-conducting oil, the hot air pipe 1 heat-conducting oil, and the hot air pipe 2 heat-conducting oil, respectively. The die head temperature sensor, the hot air pipe 1 temperature sensor and the hot air pipe 2 temperature sensor are installed inside the die head body and the hot air pipe 1 and the hot air pipe 2 respectively.
2. A meltblowing die head with heating and heat preservation function according to claim 1, characterized in that: A plurality of die head insulation oil containers are arranged on the upper part of the die head body, each of which is independent of each other, and each of which has an independent heating element, a temperature sensor, and heat transfer oil; two air passages are arranged inside the die head body, and the two air passages are respectively connected to the hot air pipe one and the hot air pipe two; the hot air in the hot air pipe passes through the two air passages and is respectively ejected from the bottom of the die head body.
3. The meltblowing die head with heating and heat preservation function according to claim 1, characterized in that: The number of the die head insulation oil containers is set according to the needs of the meltblowing process, and the number is between 3 and 9. The heating temperature of the heating element in each die head insulation oil container is between 150 and 270° C. During heating, the heating temperature in each die head insulation oil container can be independently adjusted according to the requirements of the meltblowing process.
4. The meltblowing die head with heating and heat preservation function according to claim 1, characterized in that: Both ends of the hot air duct 1 and the hot air duct 2 installed on both sides of the die body are hot air inlets, and there are air duct 1 and air duct 2 interconnected with each other between the hot air duct and the die body. After the hot air enters the hot air duct 1 and the hot air duct 2, it passes through the air duct and is ejected from the bottom of the die body.
5. The melt-blowing die head with heating and heat preservation function according to claim 1, characterized in that: The hot air pipe-insulating oil container is arranged outside the hot air pipe, and the hot air pipe-insulating oil container is provided with a hot air pipe-heating oil, a hot air pipe-heating element, and a hot air pipe-temperature sensor. The heating temperature of the hot air pipe-heating element is between 150-170°C.
6. The melt-blowing die head with heating and heat preservation function according to claim 1, characterized in that: The second hot air pipe insulation oil container is arranged outside the second hot air pipe, and the second hot air pipe insulation oil container is provided with the second hot air pipe heat transfer oil, the second hot air pipe heating element, and the second hot air pipe temperature sensor. The temperature heated by the second hot air pipe heating element is between 150-170°C.