CN209832670U - Supercritical fluid extrusion blow molding foaming forming device - Google Patents
Supercritical fluid extrusion blow molding foaming forming device Download PDFInfo
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- CN209832670U CN209832670U CN201920164308.8U CN201920164308U CN209832670U CN 209832670 U CN209832670 U CN 209832670U CN 201920164308 U CN201920164308 U CN 201920164308U CN 209832670 U CN209832670 U CN 209832670U
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- screw extruder
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Abstract
The utility model provides a supercritical fluid extrudes blowing foaming forming device, the device include the feed system, double screw extruder, admission valve, pressure air pump, connector I, dynamic mixing roll, connector II, the melt pump, connector III, single screw extruder, right angle aircraft nose and blow mold. The feeding system is arranged at the feeding section of the double-screw extruder, the air inlet valve is connected with the pressure air pump and the melting section of the double-screw extruder through the air conveying pipe, the double-screw extruder and the dynamic mixer are connected through the connector I, the dynamic mixer and the melt pump are connected through the connector II, the melt pump and the single-screw extruder are connected through the connector III, the right-angle machine head is arranged at the discharge end of the single-screw extruder, and the blow molding die is arranged below the right-angle machine head. The device is suitable for thermoplastic polymers, realizes the production of extrusion blow molding foaming products by utilizing supercritical fluid, and has the characteristics of simple structure, cost reduction, environmental protection, convenient operation and control and the like.
Description
Technical Field
The utility model relates to a polymer extrusion blow molding foaming forming device, in particular to a supercritical fluid extrusion blow molding foaming forming device.
Background
Extrusion blow molding is a common polymer molding method and is widely applied to the fields of daily necessities, washing, beverage packaging, industrial storage and transportation and the like. Extrusion blow molding is a molding method in which a thermoplastic polymer is continuously extruded from a head through an extruder to form a polymer parison, and then the parison is blow-molded in a blow mold. Compared with injection molding, the device has the advantages of lower manufacturing cost, stronger adaptability, good formability and capability of forming products with complex undulating curves.
However, the traditional extrusion blow molding has the defects of easy deformation of products, more material consumption, poor impact resistance and the like. Compared with the traditional extrusion blow molding, the extrusion blow molding foaming molding can effectively solve the problems, the product has better mechanical properties such as notch impact strength, toughness and specific strength, in addition, the fatigue resistance life can be greatly improved, and hollow foaming products with different shapes and functions can be produced according to the difference of the extrusion blow molding foaming materials and the product structure.
Extrusion blow molding foam molding can adopt a method of adding chemical foaming master batch into polymer raw materials, but can cause potential problems of residues in materials, environmental pollution in the processing process and the like. Supercritical CO2Or N2As a physical foaming agent, the material has the advantages of low price, safety, no pollution and the like, and is widely applied to the production process of extrusion blow molding or injection blow molding.
Disclosure of Invention
The utility model discloses to current production technologyIn combination with the potential market advantages of extrusion blow molded foamed articles, the use of supercritical CO2Or N2The foaming agent is used as a foaming agent, and integrated production is carried out by integrating the advantages of extrusion blow molding and extrusion foaming molding technologies through reasonable structural design, so that the foaming agent has the advantages of reducing the weight of blow-molded products, improving the impact strength of the blow-molded products and the like.
A supercritical fluid extrusion blow molding foaming forming device, including feed system, double screw extruder, admission valve, pressure air pump, connector I, dynamic mixing roll, connector II, melt pump, connector III, single screw extruder, right angle aircraft nose and blow mold. The feeding system is arranged at the feeding section of the double-screw extruder, the air inlet valve is connected with the pressure air pump and the melting section of the double-screw extruder through the air conveying pipe, the double-screw extruder and the dynamic mixer are connected through the connector I, the dynamic mixer and the melt pump are connected through the connector II, the melt pump and the single-screw extruder are connected through the connector III, the right-angle machine head is arranged at the discharge end of the single-screw extruder, and the blow molding die is arranged below the right-angle machine head.
A supercritical fluid extrusion blow molding foaming forming device, blow mold includes mould cavity, mould main part, cooling system, incision part, exhaust hole groove, guide part, heating system and air compression system.
A supercritical fluid extrusion blow molding foaming forming device, heating system is portable annular infrared heater. The movable annular infrared heater comprises a light emitting tube, a reflecting film, a temperature adjusting system and a guide rail. The accurate temperature control of the parison is realized, the parison is prevented from foaming too fast in the extrusion process, and the quality of a blow molding foaming product is improved.
A supercritical fluid extrusion blow molding foaming forming device, cooling system sets up the cooling water course, cooling water course aperture is 10 ~ 25mm, and the hole interval is 30 ~ 100 mm.
A supercritical fluid extrusion blow molding foaming forming device, the right angle aircraft nose is spiral side direction feeding formula right angle aircraft nose. The core rod of the machine head is designed into a spiral shape at the inlet part of the melt, so that a homogeneous system can be further mixed, and the pressure stabilizing effect is achieved.
A supercritical fluid extrusion blow molding foaming forming device, according to the requirement of goods size and shape and production volume, blow mold adopts reciprocating type two pairs of mould shaping or carousel formula to pay the mould shaping more.
The utility model discloses a supercritical fluid extrusion blow molding foaming forming device, the twin-screw extruder sets up six sections temperature control areas altogether, the temperature control scope is first district 150 ~ ℃, second district 180 ~ ℃, three district 180 ~ 210 ℃, four district 180 ~ ℃, five district 170 ~ ℃, six district 160 ~ ℃. the temperature control scope of connector I150 ~ ℃. the temperature control scope of dynamic mixer is 110 ~ 210 ℃. the temperature control scope of connector II is 110 ~ ℃. the temperature control scope of melt pump is 110 ~ ℃. the temperature control scope of connector III is 110 ~ 220 ℃. the single-screw extruder sets up four sections temperature control areas altogether, the temperature control scope is first district 135 ~ ℃., two district 145 ~ ℃., 150 ~ ℃. four district 150 ~ ℃. the right angle aircraft nose temperature control scope is 130 ~ ℃. the pressure air pump is 5 ~ ml/min.
The utility model has the following positive and beneficial effects
The utility model adopts supercritical fluid CO2Or N2Compared with the traditional chemical foaming agent used by an extrusion blow molding foaming forming device, the physical foaming agent has the advantages of no residue, no combustion, no explosion, no toxicity, no corrosion to equipment, environmental protection, low price and the like.
The utility model discloses a portable annular infrared heater can realize the accurate control to tubular parison temperature, has effectively avoided polymer to foam in advance, the temperature crosses lowly and is difficult to latent problem such as foaming from right angle aircraft nose extrusion process.
The utility model discloses extrude the polymer blow molding and extrude foam molding collection in an organic whole, improved production efficiency. The obtained product has the advantages of light weight, obvious heat preservation effect and excellent impact performance, and can reduce surface quality defects such as deformation, dent, uneven thickness and the like and improve the dimensional stability of the product.
Drawings
Fig. 1 is a schematic structural view of a supercritical fluid extrusion blow molding foaming molding device according to the present invention;
fig. 2 is a schematic view of a right angle machine head according to the present invention;
fig. 3 is a top view of the blow mold according to the present invention;
FIG. 4 is a schematic view of an extrusion blow molded parison according to the present invention;
FIG. 5 is a schematic view of the clamping and mold closing of the extrusion blow molded parison of the present invention;
FIG. 6 is a schematic view of an extrusion blow molded parison and a cooled parison according to the present invention;
FIG. 7 is a schematic view illustrating the mold opening and product removal of the extrusion blow molding foaming molding of the present invention;
the symbols in the drawings indicate that: 1-feeding system, 2-double screw extruder, 3-air inlet valve, 4-pressure air pump, 5-connector I, 6-dynamic mixer, 7-connector II, 8-melt pump, 9-connector III, 10-single screw extruder, 11-right angle head, 12-blow mold, 13-extruder joint, 14-head exterior, 15-core rod, 16-neck mold, 17-adjusting bolt, 18-core mold, 19-mold main body, 20-mold cavity, 21-movable annular infrared heater.
Detailed Description
Example 1
Referring to fig. 1 ~ and fig. 7, the device for extrusion blow molding foaming of supercritical fluid comprises a feeding system 1, a twin-screw extruder 2, an air inlet valve 3, a pressure air pump 4, a connector I5, a dynamic mixer 6, a connector II 7, a melt pump 8, a connector III 9, a single-screw extruder 10, a right-angle head 11 and a blow mold 12, wherein the feeding system 1 is arranged at a feeding section of the twin-screw extruder 2, the air inlet valve 3 is connected with the pressure air pump 4 and a melting section of the twin-screw extruder 2 through an air conveying pipe, the connector I5 is connected with the twin-screw extruder 2 and the dynamic mixer 6, the connector II 7 is connected with the dynamic mixer 6 and the melt pump 8, the connector III 9 is connected with the melt pump 8 and the single-screw extruder 10, the right-angle head 11 is arranged at a discharging end of the single-screw extruder 10, and the blow mold 12 is arranged below the right-.
The blow mold 12 includes a mold cavity 20, a mold body 19, a cooling system, a cutout portion, a vent, a guide portion, a heating system, and an air compression system.
The heating system is a mobile ring infrared heater 21. The movable ring infrared heater 21 includes a light emitting tube, a reflective film, a temperature adjusting system, and a guide rail. The number of the luminous tubes is 5.
The cooling system is provided with cooling water channels, the aperture of each cooling water channel is 20mm, and the hole spacing is 80 mm.
The right-angle machine head is a spiral lateral feeding type right-angle machine head 11.
The blow mold 12 is formed by two reciprocating molds.
The double-screw extruder 2 is provided with six temperature control zones, and the temperature of each zone is set to 160 ℃ in the first zone, 165 ℃ in the second zone, 170 ℃ in the third zone, 180 ℃ in the fourth zone, 185 ℃ in the fifth zone and 180 ℃ in the sixth zone. The temperature of the linker I5 was 160 ℃. The temperature of the dynamic mixer 6 was 170 ℃. The temperature of the linker II 7 was 175 ℃. The temperature of the melt pump 8 was 185 ℃. The temperature of the linker III 9 was 195 ℃. The single screw extruder 10 is provided with four temperature control zones, and the temperature of each zone is set to 170 ℃ in the first zone, 175 ℃ in the second zone, 170 ℃ in the third zone and 160 ℃ in the fourth zone. The crosshead 11 temperature was 160 ℃. The air inlet amount of the pressure air pump 4 is 9 ml/min.
Example 2
The same parts of embodiment 2 as those of embodiment 1 have the same functions and are not repeated for the sake of brevity.
Example 2 differs from example 1 in the apparatus thereof: the blow mold 12 is formed by a rotating disc type multi-pair mold.
Of course, the invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (7)
1. A supercritical fluid extrusion blow molding foaming forming device is characterized in that: including feed system, twin-screw extruder, admission valve, pressure air pump, connector I, dynamic mixing ware, connector II, the melt pump, connector III, single screw extruder, right angle aircraft nose and blow mold, feed system sets up at twin-screw extruder feed section, the admission valve passes through gas conveying pipe and links to each other with pressure air pump and twin-screw extruder melting section, twin-screw extruder and dynamic mixing ware are connected to connector I, dynamic mixing ware and melt pump are connected to connector II, melt pump and single screw extruder are connected to connector III, the right angle aircraft nose sets up at single screw extruder discharge end, blow mold sets up in right angle aircraft nose below.
2. The supercritical fluid extrusion blow molding foam molding apparatus according to claim 1, wherein: the blow mold includes a mold cavity, a mold body, a cooling system, a cutout portion, an exhaust hole, a guide portion, a heating system, and an air compression system.
3. The supercritical fluid extrusion blow molding foam molding apparatus according to claim 2, wherein: the heating system is a movable annular infrared heater which comprises a light emitting tube, a reflecting film, a temperature adjusting system and a guide rail.
4. The apparatus of claim 2, wherein the cooling system comprises cooling water channels with a diameter of 10 ~ 25mm and a distance of 30 ~ 100 mm.
5. The supercritical fluid extrusion blow molding foam molding apparatus according to claim 1, wherein: the right-angle machine head is a spiral lateral feeding type right-angle machine head.
6. The supercritical fluid extrusion blow molding foam molding apparatus according to claim 1, wherein: the blow molding die is formed by adopting two reciprocating dies or a plurality of rotating disc dies.
7. The supercritical fluid extrusion blow molding foaming molding device according to claim 1, wherein the twin-screw extruder is provided with six temperature control zones in total, the temperature control ranges are 150 ~ 180 ℃ in the first zone, 180 ~ 210 ℃ in the second zone, 180 ~ 210 ℃ in the third zone, 180 ~ 210 ℃ in the fourth zone, 170 ~ 190 ℃ in the fifth zone, 160 ~ 185 ℃ in the sixth zone, 150 ~ 220 ℃ in the temperature control range of the connecting body I, 110 ~ 210 ℃ in the temperature control range of the dynamic mixer, 110 ~ 220 ℃ in the temperature control range of the connecting body II, 110 ~ 210 ℃ in the temperature control range of the melt pump, 110 ~ 220 ℃ in the temperature control range of the connecting body III, and four temperature control zones are provided in total in the single-screw extruder, the temperature control ranges are 135 ~ 190 ℃ in the first zone, 145 ~ 200 ℃ in the temperature control range of the single-screw extruder, 150 ~ 200 ℃ in the temperature control range of the four zones, 150 ~ 200 ℃ in the temperature control range of the right angle head, 130 ~ 210 ℃ in the air inlet amount of 5 ~ 30 ml/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920164308.8U CN209832670U (en) | 2019-01-30 | 2019-01-30 | Supercritical fluid extrusion blow molding foaming forming device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920164308.8U CN209832670U (en) | 2019-01-30 | 2019-01-30 | Supercritical fluid extrusion blow molding foaming forming device |
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| CN209832670U true CN209832670U (en) | 2019-12-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109955493A (en) * | 2019-01-30 | 2019-07-02 | 郑州大学 | A kind of supercritical fluid extrusion-blown modling foaming and forming apparatus and technique |
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- 2019-01-30 CN CN201920164308.8U patent/CN209832670U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109955493A (en) * | 2019-01-30 | 2019-07-02 | 郑州大学 | A kind of supercritical fluid extrusion-blown modling foaming and forming apparatus and technique |
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