CN108145945B - Non-woven fabric extrusion die head and extrusion method thereof - Google Patents
Non-woven fabric extrusion die head and extrusion method thereof Download PDFInfo
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- CN108145945B CN108145945B CN201711479719.8A CN201711479719A CN108145945B CN 108145945 B CN108145945 B CN 108145945B CN 201711479719 A CN201711479719 A CN 201711479719A CN 108145945 B CN108145945 B CN 108145945B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/355—Conveyors for extruded articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a non-woven fabric extrusion die head and an extrusion method thereof, aiming at providing a non-woven fabric extrusion die head which has simple structure, high production quality, long cleaning interval time, uniform thickness of finished products and uniform temperature.
Description
Technical Field
The invention relates to the technical field of non-woven fabric production, in particular to a non-woven fabric extrusion die head and an extrusion method thereof.
Background
The extrusion die head of the non-woven fabric is used for preparing main production equipment of the non-woven fabric.
Currently, nonwoven fabric extrusion dies on the market include an upper die and a lower die. The structure of the runner arrangement adopted by the traditional non-woven fabric extrusion die head can improve the yield and reduce the quality of a finished product, and the traditional runner design can lead to uneven thickness of the finished product due to uneven pressure on an extrusion port, the cleaning time interval is shorter, the practicability is affected, and the upper die and the lower die are heated by adopting a heating plate, but in such a heating mode, the heating is uneven, and the quality of the finished product is easy to be poor; and the traditional extrusion process has complex steps, poor controllability and poor quality of finished products, which are problems at present.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the non-woven fabric extrusion die head which has the advantages of simple structure, high production quality, long cleaning interval time, uniform thickness of finished products and uniform temperature.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a non-woven fabrics extrusion die head, includes mould and lower mould, go up mould and lower mould and connect and be formed with the runner that the cross-section is the water droplet form, all be equipped with a plurality of pipelines that are used for carrying the conduction oil on going up, the lower mould, the runner includes convex part and trapezoidal part, and the ratio between the area of convex part and the area of trapezoidal part is between 1.40-1.45, the runner still includes the extrusion mouth of isosceles trapezoid shape, and the extrusion mouth includes both sides water conservancy diversion wall, and the water conservancy diversion wall is arc form and is evagination structure setting.
The invention is further provided with: the ratio between the depth of the circular arc-shaped part and the depth of the trapezoid part is between 0.90 and 0.95, and the ratio between the depth of the trapezoid part and the depth of the extrusion opening is between 2.8 and 3.0.
The invention is further provided with: the extrusion port comprises an input end and an output end which are communicated with the quadrilateral part, and the ratio between the port width of the input end and the port width of the output end is 5-5.2.
The invention is further provided with: the distance between two adjacent pipelines is the same, and the outer walls of the pipelines are provided with corrugated contact walls.
By adopting the technical scheme, the beneficial effects are that: (1) The flow channel of the extrusion die head is arranged to comprise a circular arc part and a trapezoid part, the ratio between the area of the circular arc part and the area of the trapezoid part is 1.40-1.45, the extrusion outlet pressure of the flow channel is ensured to be consistent by adopting a specific structure, and the production quality of the non-woven fabric is ensured while the yield is improved;
(2) The extrusion port of the runner comprises guide walls at two sides, the guide walls are arc-shaped and are arranged in a convex structure, the convex structure is adopted, the contact area between the extrusion port and the formed non-woven fabric is reduced, the residual raw materials are further ensured, and the cleaning interval duration is prolonged;
(3) The upper die and the lower die are respectively provided with a plurality of pipelines for conveying heat conduction oil, and the structure is simple, so that the heating uniformity is improved, and the production quality and the production efficiency are ensured;
(4) The ratio between the depth of the circular arc-shaped part and the depth of the trapezoid part is 0.90-0.95, and the ratio between the depth of the trapezoid part and the depth of the extrusion opening is 2.8-3.0, so that the consistency of the extrusion opening pressure of the convection opening is further ensured, and the production quality of the non-woven fabric is ensured while the yield is improved;
(5) The extrusion port comprises an input end and an output end which are communicated with the quadrilateral part, the ratio of the port width of the input end to the port width of the output end is 5-5.2, the balance of the extrusion port pressure of the convection port is further ensured, and the production quality of the non-woven fabric is ensured while the yield is improved;
(6) The interval between two adjacent pipelines is the same, and be equipped with the ripple form contact wall on the outer wall of pipeline, adopt above-mentioned structure to set up, improve and be the even degree of heating to and guaranteed the abundant heating of upper and lower mould, improve production quality and production efficiency.
An extrusion method of a non-woven fabric extrusion die head is characterized by comprising the following steps: (1) preparation: raw materials for preparing non-woven fabrics, an extrusion die head and heat conducting oil;
(2) Preheating: the upper die head and the lower die head are communicated with the heat conducting oil pipeline, so that the upper die head and the lower die head are ensured to be preheated, the flow speed and the temperature of the heat conducting oil are controlled, and the upper die head and the lower die head are fully heated;
(3) Preparation: raw materials are led into a die cavity and extruded through an extrusion port of a runner, the flow rate of the raw materials is controlled to be uniform when the raw materials are led into the die cavity, the pressure drop of the flow rate to the extrusion port is ensured to be uniform, and the thickness of the extruded non-woven fabric is ensured to be uniform;
(4) And (3) cooling: after extrusion, controlling the traction speed of the formed non-woven fabric, so that the formed non-woven fabric can be naturally cooled at normal temperature, and the traction speed can be controlled according to different environmental temperatures;
(5) And (3) coiled materials: the non-woven fabric is wound by the traction roller, the rotation speed of the traction roller is controlled, and the residual temperature of the formed non-woven fabric is ensured to ensure that the non-woven fabric has good retractility;
(6) And (3) collecting: cutting edges and rewinding.
The invention is further provided with: the heat conduction oil adopts alkylbenzene type heat conduction oil, alkyl naphthalene type heat conduction oil, alkyl biphenyl type heat conduction oil, biphenyl and biphenyl ether low-melting mixture type heat conduction oil or xylyl ether type heat conduction oil, the preheating temperature is controlled between 60 ℃ and 120 ℃, the temperature of the heat conduction oil is controlled between 160 ℃ and 200 ℃, and the flow rate of the heat conduction oil is 0.6m/s-6m/s.
The invention is further provided with: when the production time is in summer, the traction speed is controlled to be 8-10 m/min, and when the production time is in winter, the traction speed is controlled to be 4-6 m/min.
The invention is further provided with: the rotation speed of the traction roller is controlled between 10 and 15 revolutions per minute, and the traction roller is preheated at a preheating temperature of between 40 and 60 ℃.
By adopting the technical scheme, the beneficial effects are that: the processing steps are simple, the production and processing degree is convenient, the production efficiency is high, the production quality is high, the uniform degree of preheating and heating is ensured from the heat conduction oil selected during preheating, the production quality is improved, the flow rate of raw materials is controlled when the raw materials are led into the die cavity, the uniform degree of the thickness of the product is ensured, and the convenience degree is also ensured during the collection of the final product.
Drawings
Fig. 1 is a schematic cross-sectional view of an embodiment of a nonwoven fabric extrusion die of the present invention.
FIG. 2 is a schematic view showing a cross-sectional structure of a flow channel of an embodiment of a nonwoven fabric extrusion die of the invention.
Fig. 3 is a process flow diagram of an embodiment of an extrusion method of a nonwoven fabric extrusion die of the present invention.
FIG. 4 is a table showing the detection of each item of the finished product of an embodiment of the extrusion method of the nonwoven fabric extrusion die of the present invention.
In the figure, reference numerals are 1-upper die, 2-lower die, 3-runner, 30-circular arc part, 31-trapezoid part, 32-extrusion port and 320-guide wall.
Detailed Description
An embodiment of a nonwoven fabric extrusion die and an extrusion method according to the present invention will be further described with reference to fig. 1 to 4.
The utility model provides a non-woven fabrics extrusion die head, including last mould 1 and lower mould 2, go up mould 1 and lower mould 2 and connect and form the runner 3 that the cross-section is the water droplet form, all be equipped with a plurality of pipelines 4 that are used for carrying the conduction oil on going up, the interval between two adjacent pipelines 4 is the same, and be equipped with the ripple form contact wall on the outer wall of pipeline 4, if adopt bellows etc., runner 3 includes convex portion 30 and trapezoidal portion 31, the ratio between the area of convex portion 30 and the area of trapezoidal portion 31 is between 1.40-1.45, runner 3 still includes the extrusion mouth 32 of isosceles trapezoid, because raw and other materials fluid is the uniform velocity flow, the pressure to extrusion mouth 32 then has become the ratio of runner convex portion and trapezoidal portion volume, consequently, can calculate the pressure to the extrusion mouth through the ratio between the area of convex portion and the cross-section area of trapezoidal portion, and set up to including both sides water conservancy diversion wall 320, water conservancy diversion wall 320 is arc form and is the evagination structure setting, the contact area between the extrusion mouth and the shaped non-woven fabrics has been reduced, and the raw and other materials that have been guaranteed to remain between the equal ratio between the depth of 0.0-0 of the depth of surface between the equal to the depth of area of trapezoidal portion of area, the depth between the equal to the 3, and the depth between the equal range of the depth of the extrusion mouth is kept in order to be kept between the depth between the equal to be 0.0.
The invention further provides that the extrusion port comprises an input end and an output end which are communicated with the quadrilateral part, the ratio of the port width of the input end to the port width of the output end is 5-5.2, the balance of the extrusion port pressure of the convection port is further ensured, and the production quality of the non-woven fabric is ensured while the yield is improved.
In the embodiment of the invention, the radius of the arc part is set to 25mm, the upper bottom of the trapezoid part is 10.5mm, the length is shown as L2 in the figure, the lower bottom is 45.5mm, the length is shown as L1 in the figure, the depth of the arc part is 35.5mm, the length is shown as L4 in the figure, the depth of the trapezoid part is 37.4mm, the length is shown as L5 in the figure, the upper bottom of the extrusion opening is 2mm, the length is shown as L3 in the figure, the lower bottom of the extrusion opening is 10.5mm, the length is shown as L2 in the figure, the radius of the convex part is 41mm, the depth of the extrusion opening is 19mm, the length is shown as L6 in the figure, and the pressure of a material flow formed at the extrusion opening can be between 8MPa and 10 MPa.
An extrusion method of a non-woven fabric extrusion die head comprises the following steps: (1) preparation: raw materials for preparing non-woven fabrics, an extrusion die head and heat conducting oil;
(2) Preheating: the upper die head and the lower die head are communicated with the heat conducting oil pipeline, so that the upper die head and the lower die head are ensured to be preheated, the flow speed and the temperature of the heat conducting oil are controlled, and the upper die head and the lower die head are fully heated;
(3) Preparation: raw materials are led into a die cavity and extruded through an extrusion port of a runner, the flow rate of the raw materials is controlled to be uniform when the raw materials are led into the die cavity, the pressure drop of the flow rate to the extrusion port is ensured to be uniform, and the thickness of the extruded non-woven fabric is ensured to be uniform;
(4) And (3) cooling: after extrusion, controlling the traction speed of the formed non-woven fabric, so that the formed non-woven fabric can be naturally cooled at normal temperature, and the traction speed can be controlled according to different environmental temperatures;
(5) And (3) coiled materials: the non-woven fabric is wound by the traction roller, the rotation speed of the traction roller is controlled, and the residual temperature of the formed non-woven fabric is ensured to ensure that the non-woven fabric has good retractility;
(6) And (3) collecting: cutting edges and rewinding.
The invention further provides that the heat conducting oil adopts alkylbenzene type heat conducting oil, alkyl naphthalene type heat conducting oil, alkyl biphenyl type heat conducting oil, biphenyl and biphenyl ether low-melting mixture type heat conducting oil or xylyl ether type heat conducting oil, the heat conducting oil is selected, the temperature control range is improved, the temperature controllability is ensured, the preheating temperature is controlled between 60 ℃ and 120 ℃, the temperature of the heat conducting oil is controlled between 160 ℃ and 200 ℃, the flow rate of the heat conducting oil is controlled between 0.6m/s and 6m/s, the control of the flow rate is converted into the control of the preheating temperature through the flow rate, the heat conducting oil is used as a main heating source, the pump is used as a heat conducting oil power source, the temperature control is realized through the control of the flow rate, the heating mode ensures the temperature controllability, the damage caused by the overhigh local temperature is avoided, the flow rate adopted in the processing is ensured, the temperature of the heat conducting oil can be reduced when the processing is required to be stopped, the temperature is accelerated, the gradual change of the temperature is ensured, and the practical effect is improved.
The invention is further arranged that when the production time is in summer, the traction speed is controlled to be 8-10 m/min, and when the production time is in winter, the traction speed is controlled to be 4-6 m/min, and the traction speed is arranged, so that the convenience of collection is improved, the plasticity of the finished non-woven fabric is ensured, and the collection is convenient.
The invention is further arranged that the rotation speed of the traction roller is controlled between 10 and 15 revolutions per minute, the traction roller is preheated, the preheating temperature is between 40 and 60 ℃, the plasticity of the finished non-woven fabric is ensured, and the collection is convenient.
By adopting the technical scheme, the beneficial effects are that: the processing steps are simple, the production and processing degree is convenient, the production efficiency is high, the production quality is high, the uniform degree of preheating and heating is ensured from the heat conduction oil selected during preheating, the production quality is improved, the flow rate of raw materials is controlled when the raw materials are led into the die cavity, the uniform degree of the thickness of the product is ensured, and the convenience degree is also ensured during the collection of the final product.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention, but one skilled in the art can make common changes and substitutions within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides a non-woven fabrics extrusion die head, includes mould and lower mould, characterized by: the upper die and the lower die are connected to form a runner with a water drop-shaped cross section, the runner comprises a circular arc-shaped part and a trapezoid-shaped part, the ratio between the area of the circular arc-shaped part and the area of the trapezoid-shaped part is 1.40-1.45, the runner also comprises an isosceles trapezoid-shaped extrusion opening, the extrusion opening comprises two side guide walls, the guide walls are arc-shaped and are arranged in a convex structure, and a plurality of pipelines for conveying heat conducting oil are arranged on the upper die and the lower die;
the ratio between the depth of the circular arc-shaped part and the depth of the trapezoid part is between 0.90 and 0.95, and the ratio between the depth of the trapezoid part and the depth of the extrusion opening is between 2.8 and 3.0;
the extrusion port comprises an input end and an output end which are communicated with the quadrilateral part, and the ratio between the port width of the input end and the port width of the output end is 5-5.2.
2. The nonwoven fabric extrusion die of claim 1, wherein: the distance between two adjacent pipelines is the same, and the outer walls of the pipelines are provided with corrugated contact walls.
3. The extrusion method of a nonwoven fabric extrusion die according to any one of claims 1 to 2, characterized by the steps of:
(1) Preparation: raw materials for preparing non-woven fabrics, an extrusion die head and heat conducting oil;
(2) Preheating: the upper die head and the lower die head are communicated with the heat conducting oil pipeline, so that the upper die head and the lower die head are ensured to be preheated, the flow speed and the temperature of the heat conducting oil are controlled, and the upper die head and the lower die head are fully heated;
(3) Preparation: raw materials are led into a die cavity and extruded through an extrusion port of a runner, the flow rate of the raw materials is controlled to be uniform when the raw materials are led into the die cavity, the pressure drop of the flow rate to the extrusion port is ensured to be uniform, and the thickness of the extruded non-woven fabric is ensured to be uniform;
(4) And (3) cooling: after extrusion, controlling the traction speed of the formed non-woven fabric, so that the formed non-woven fabric can be naturally cooled at normal temperature, and controlling the traction speed according to different environment temperatures;
(5) And (3) coiled materials: the non-woven fabric is wound by the traction roller, the rotation speed of the traction roller is controlled, and the residual temperature of the formed non-woven fabric is ensured to ensure that the non-woven fabric has good retractility;
(6) And (3) collecting: cutting edges and rewinding.
4. The extrusion method of a nonwoven fabric extrusion die according to claim 3, wherein the heat transfer oil is alkylbenzene type heat transfer oil, alkylnaphthalene type heat transfer oil, alkylbiphenyl type heat transfer oil, low melting mixture type heat transfer oil of biphenyl and biphenyl ether or xylyl ether type heat transfer oil, and the preheating temperature is controlled between 60 ℃ and 120 ℃, the temperature of the heat transfer oil is controlled between 160 ℃ and 200 ℃, and the flow rate of the heat transfer oil is 0.6m/s to 6m/s.
5. The extrusion process of a nonwoven fabric extrusion die according to claim 3, wherein the drawing speed is controlled to be 8m/min to 10m/min when the production time is in summer, and the drawing speed is controlled to be 4m/min to 6m/min when the production time is in winter.
6. The extrusion process of a nonwoven fabric extrusion die according to claim 3, wherein the rotation speed of the pulling roll is controlled to be 10-15 rpm, and the pulling roll is preheated at a preheating temperature of 40-60 ℃.
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| CN201711479719.8A CN108145945B (en) | 2017-12-29 | 2017-12-29 | Non-woven fabric extrusion die head and extrusion method thereof |
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| CN201711479719.8A CN108145945B (en) | 2017-12-29 | 2017-12-29 | Non-woven fabric extrusion die head and extrusion method thereof |
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| CN108145945B true CN108145945B (en) | 2023-04-28 |
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| CN207724796U (en) * | 2017-12-29 | 2018-08-14 | 台州市黄岩晶威模具有限公司 | A kind of non-woven fabrics extrusion die |
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| CN1208371A (en) * | 1995-12-29 | 1999-02-17 | C·A·格林尔和索恩有限公司 | Process and device for mixing or thermal homogenisation of at least one fluid |
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|---|---|
| CN108145945A (en) | 2018-06-12 |
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