CN207105569U - The continuous foamed shaped device of fine-celled foam granular materials - Google Patents

Abstract

It the utility model is related to expanded material manufacture technology field, there is provided a kind of compact-sized, while effective improving production efficiency, the continuous foamed shaped device of fine-celled foam granular materials of effective lifting foaming quality, including extruder, extruder includes axially export pipeline, axial screw and screw drive motor, axially sizing material entrance is offered on export pipeline, axially heater is furnished with the lateral wall of export pipeline, axially export pipeline is provided with extrusion, extrusion is axially extending to be provided with connecting tube, streamwise is sequentially provided with filter house in connecting tube, gear pump and static mixer, the lateral wall of connecting tube is provided with heat conduction oil lagging；Static mixer is provided with air intake and auxiliary agent entrance, and the output end of static mixer is provided with shunting extrusion die, and shunting extrusion die is provided with the extrusion duct of multiple laid out in parallel；Also include doctor blade device, the doctor blade device is used for the discharging pelletizing for extruding duct.

Description

Microcellular foam granular material continuous foam molding device

technical field

The utility model relates to the technical field of foam material production, in particular to a continuous foam molding device for microporous foam particle materials.

Background technique

Microcellular foam particle material is a new type of foaming material with a cell diameter of micron. Its biggest feature is that the cells are small and dense, and the distribution is uniform. The cell diameter is 0.1-10 μm, and the cell density is 109-1015/cm ³ . Microporous plastics improve the toughness of products while reducing the amount of plastic used, and are considered to be "new materials in the 21st century". Compared with traditional foam plastics with cell size in millimeters, microcellular foam materials have more excellent mechanical properties, dimensional stability, thermal stability, dielectric properties, etc., and have special applications in the fields of automobiles, aircraft and various transportation equipment. In addition, it can also be used in food packaging, biomedicine, building materials, home appliances, information engineering and sports equipment.

Continuous extrusion of microcellular foams is very different from conventional foam processing. The commonly used continuous microcellular foam processing process is: the polymer is added to the extruder, after melting and homogenization, the gas is injected into the polymer solution through the injection port of the barrel, and the mixing field is sheared in the barrel A homogeneous polymer-gas system is formed under the action of the gas, and then transported to the foaming head for foaming, molding, and setting to obtain a microporous structure product. However, this molding method has the disadvantages of unstable pressure, uneven mixing of supercritical fluid, low quality of foam molding, unstable magnification, slow cooling speed for shaping, and low output.

Contents of the invention

Therefore, in view of the above problems, the utility model proposes a compact structure, which can effectively improve the production efficiency and effectively improve the foaming quality of the microcellular foam particle material continuous foaming molding device.

In order to realize the above-mentioned technical problems, the solution adopted by the utility model is: a continuous foaming molding device for microporous foam granular materials, including a frame and a control switchboard, the frame is provided with an extruder, and the extruder includes The axial lead-out pipe, the axial screw threaded through the axial lead-out pipe, and the screw drive motor for driving the axial screw to rotate, the said axial lead-out pipe is provided with a rubber inlet, and the outer wall of said axial lead-out pipe The heating device is evenly distributed, and the axial outlet pipeline is located at the free end of the axial screw rod, and an extrusion port is provided; the extrusion port is axially extended and provided with a connecting pipe, and the connecting pipe is sequentially provided with a filter part along the flow direction , a gear pump and a static mixer, the outer wall of the connecting pipe is provided with a heat transfer oil jacket; the static mixer is provided with an air inlet and an auxiliary agent inlet, and the output end of the static mixer is provided with a split The extrusion die head is provided with a plurality of extrusion channels arranged side by side on the split flow extrusion die head; it also includes a scraper device, and the scraper device is used for discharging and pelletizing the extrusion channels; on the connecting pipe There are pressure sensors at the output end of the filter part, the output end of the gear pump and the output end of the static mixer, and the pressure sensors are electrically connected with the control master, and the screw drive motor, gear pump and scraper device are all controlled by the control master .

Further, the aspect ratio of the axial screw is 20:1-25:1.

Further, the heating device is a heating coil, and the heating coil surrounds the outer wall of the axially leading pipe.

Further, the filter unit includes a filter screen and a screen changer, and the filter screen is placed in the screen changer.

Further, the gas inlet and the auxiliary agent inlet are respectively connected with a gas quantitative constant pressure continuous delivery pump and an auxiliary agent quantitative constant pressure continuous delivery pump, and the gas quantitative constant pressure continuous delivery pump and the auxiliary agent quantitative constant pressure continuous delivery pump All are controlled by the control switchboard.

Further, the diameter of the extrusion channel is 1-3 mm; the length of the extrusion channel is 1-10 cm.

Further, the length of the static mixer is 1-3m.

Further, the pelletizing cooling method is water ring cutting or underwater cutting.

By adopting the aforementioned technical scheme, the beneficial effects of the utility model are: the continuous foaming molding device for the microporous foam granular material designed as above adopts the axial transmission of the screw and the heating device to melt the rubber material, and the extrusion port is equipped with a filter The part can filter the molten rubber to remove impurities in the rubber and avoid the impact of impurities on the formation of cells in the subsequent foaming process; the molten rubber is mixed with supercritical CO2 or N2 and other gases and additives in a static mixer. Blending and fusion, a static mixer of a certain length enhances the mixing of supercritical fluid, additives and polymer materials; the outer wall of the connecting pipe is equipped with a heat transfer oil jacket, that is, the connecting pipe has a constant temperature effect, and the material is blended and fused Finally, in the extrusion channel of the split extrusion die, the foaming nucleation and growth are completed in an instant, and the pellets are cut by a scraper device, and the shape is completed in water. The cooling method can be water ring cutting or underwater cutting; At the same time, during the working process, the pressure sensor can be used to monitor the flow pressure state of the continuous foaming molding device for the microporous foam granular material at all times, so as to adjust the working state of the screw drive motor, gear pump, etc., and perform foaming regulation; Therefore, the continuous foam molding device for the microcellular foam granular material has a compact structure, simple operation, effectively integrates multiple production processes, can effectively improve production efficiency, and can also effectively control and improve the quality of foam molding. powerful.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Detailed ways

The utility model is further described now in conjunction with accompanying drawing and specific embodiment.

With reference to Fig. 1, what the utility model embodiment discloses is that the microporous foam granular material continuous foam molding device comprises a frame and a control switchboard, the frame is provided with an extruder, and the extruder includes an axial The export pipe 1, the axial screw 2 pierced through the axial export pipe, and the screw drive motor 3 that drives the axial screw to rotate, the axial export pipe 1 is provided with a rubber inlet 11, and the axial export pipe 1 Heating devices 12 are evenly distributed on the outer wall of the shaft, and the axial outlet pipe 1 is provided with an extrusion port 13 at the free end of the axial screw; the axial extension of the extrusion port 13 is provided with a connecting pipe, and A filter part 14, a gear pump 15 and a static mixer 16 are sequentially arranged along the flow direction, and a heat transfer oil jacket is arranged on the outer wall of the connecting pipe 13; the filter part 14 includes a filter screen and a screen changer, and the The filter screen is placed in the screen changer; the static mixer 16 is provided with an air inlet 161 and an auxiliary agent inlet 162, and the air inlet 161 and the auxiliary agent inlet 162 are respectively connected with a gas quantitative constant pressure continuous delivery pump and an auxiliary agent Quantitative and constant pressure continuous delivery pump; the output end of the static mixer 16 is provided with a split extrusion die head 163, and the split flow extrusion die head 163 is provided with a plurality of extrusion channels 164 arranged side by side; also includes The scraper device 4, the scraper device 4 is used for the discharge pelletizing of the extrusion channel, the pelletizing cooling method is water ring cutting or underwater cutting (not shown in the figure); the connecting pipe 13 is located at the output end of the filter part , the output end of the gear pump and the output end of the static mixer are all equipped with a pressure sensor 5, the pressure sensor 5 is connected with the control master electromechanical, the screw drive motor 3, the gear pump 15, the scraper device 4, the gas quantitative constant pressure continuous Both the delivery pump and the quantitative and constant pressure continuous delivery pump for additives are controlled by the control switchboard.

In summary, the continuous foaming molding device for microcellular foam granular materials designed above has compact structure, simple operation, good foam molding quality, effectively improves the production efficiency of microcellular foam granular materials, and has high practicability.

The above records are only examples of using the technical content of this creation. Any modifications and changes made by those who are familiar with this technology using this creation belong to the scope of patents claimed by this creation, and are not limited to those disclosed in the examples.

Claims (8)

1. the continuous foamed shaped device of fine-celled foam granular materials, it is characterised in that：Including frame and control exchange, the machine Frame is provided with extruder, and the extruder includes axially exporting pipeline, is arranged in the axially axial screw of export pipeline and driving The screw drive motor that axial screw rotates, described axially export offer sizing material entrance on pipeline, the axially export pipeline Lateral wall on be evenly equipped with heater, the position for the free end that the axially export pipeline be located at axial screw, which is provided with, extrudes Mouthful；The extrusion is axially extending to be provided with connecting tube, in the connecting tube streamwise be sequentially provided with filter house, gear pump and Static mixer, the lateral wall of the connecting tube are provided with heat conduction oil lagging；The static mixer is provided with air intake and helped Agent entrance, the output end of the static mixer are provided with shunting extrusion die, the shunting extrusion die be provided with it is multiple simultaneously Arrange the extrusion duct of arrangement；Also include doctor blade device, the doctor blade device is used for the discharging pelletizing for extruding duct；The connecting tube The upper position positioned at filter house output end, gear pump output terminal and static mixer output end is equipped with pressure sensor, described With controlling total mechatronics, the screw drive motor, gear pump, doctor blade device are controlled by controlling exchange pressure sensor.

2. the continuous foamed shaped device of fine-celled foam granular materials according to claim 1, it is characterised in that：The axial direction The draw ratio of screw rod is 20:1-25:1.

3. the continuous foamed shaped device of fine-celled foam granular materials according to claim 1, it is characterised in that：The heating Device is heating coil, and the heating coil is surrounded on axially on the lateral wall of export pipeline.

4. the continuous foamed shaped device of fine-celled foam granular materials according to claim 1, it is characterised in that：The mistake Filter portion includes screen pack and net-changing device, and the screen pack is placed in net-changing device.

5. the continuous foamed shaped device of fine-celled foam granular materials according to claim 1, it is characterised in that：It is described enter gas Mouth and auxiliary agent entrance are connected to gasometry level pressure continuous transfer pump and the quantitative level pressure continuous transfer pump of auxiliary agent, the gas The quantitative quantitative level pressure continuous transfer pump of level pressure continuous transfer pump and auxiliary agent is controlled by controlling exchange.

6. the continuous foamed shaped device of fine-celled foam granular materials according to claim 1, it is characterised in that：The extrusion The aperture in duct is 1-3mm；The a length of 1-10cm in hole in the extrusion duct.

7. the continuous foamed shaped device of fine-celled foam granular materials according to claim 1, it is characterised in that：The static state Mixer length is 1-3m.

8. the continuous foamed shaped device of fine-celled foam granular materials according to claim 1, it is characterised in that：Pelletizing cools down Mode is that water ring is cut or cut under water.