CN212666527U

CN212666527U - Die head of extrusion molding equipment for foaming materials

Info

Publication number: CN212666527U
Application number: CN202020764069.2U
Authority: CN
Inventors: 林一安
Original assignee: Luhong Co ltd
Current assignee: Luhong Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-03-09
Anticipated expiration: 2030-05-11

Abstract

The utility model discloses a die head of extrusion molding equipment for foaming materials, which leads in total material flow through a rectifying element, pressurizes the material flow in the rectifying element and then enters a pressure adjusting element, the pressure adjusting element is provided with a plurality of groups of pressure adjusting channels to divide the total material flow into a plurality of branch material flows, each group of pressure adjusting channels is provided with at least one turning part, the cross section of each branch material flow can be adjusted in size independently and differently on the advancing path, so that the branch material flows generate respective pressure adjusting effects when passing through the channels with different cross sections, and finally the pressure adjusting channels are gathered to a single space, so that the branch material flows are gathered into a collective material flow, and the volume and pressure limitations of the foaming material are completely removed, and can fully foam and shape into finished products, then the utility model can avoid the phenomenon of foam body rupture caused by insufficient tension of material melt in place by one-time foaming when the finished products with larger expansion volume are obtained.

Description

Die head of extrusion molding equipment for foaming materials

Technical Field

The utility model relates to an extrusion molding equipment especially indicates a die head that is used for extruded molding equipment of expanded material.

Background

In the extrusion molding of the polymer foam material in the prior art, a chemical or physical foaming agent and a molten polymer are mixed and then extruded into a preset die head in a continuous or intermittent extrusion manner, then pressure relief is started after the mixture is extruded out of the preset die head, the foaming agent releases gas to expand and open the polymer, so that the polymer is fully foamed and expanded, and finally, a finished product is formed. However, when the blowing agent releases a large amount of gas or the amount of gas injected is large in the process of expanding the high molecular weight polymer by the gas, the high molecular weight polymer is likely to be broken by the bubble due to insufficient melt tension, and the overall structural strength is affected. Furthermore, different high molecular polymers have different melt tensions, but the prior art die cannot change on the flow channel due to the different melt tensions.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model discloses research is carried out to the die head of giving as security out former to can compromise the volume expansion degree of polymer expanded material and the structural strength after its shaping in hope.

In order to achieve the above object, the present invention provides a die head of an extruding and forming apparatus for foaming material, which comprises:

the rectifying element is provided with an inner space, a feeding hole and a discharging hole, the inner space is respectively communicated with the feeding hole and the discharging hole, and the cross section of the inner space is gradually reduced from the feeding hole to the discharging hole;

a pressure adjustment component, it is connected with the discharge gate of this rectifier component, and this pressure adjustment component includes multiunit pressure adjustment passageway, and each group pressure adjustment passageway has an at least turning department, and the both ends of each group pressure adjustment passageway are a pan feeding hole and a discharge opening respectively, the pan feeding hole of multiunit pressure adjustment passageway is to be adjacent to arrange the setting, and arranges to be a pan feeding region, the discharge opening of multiunit pressure adjustment passageway is the dispersed arrangement setting, and arranges to be a discharge area, and the distribution area of this discharge area is greater than the distribution area of this pan feeding region, and this pan feeding region is connected with this rectifier component's discharge gate, and this discharge area connects in a single space for the discharge gate of each group pressure adjustment passageway is connected with this single space.

Each group of pressure adjusting channels further comprises a feeding channel and an intermediary channel, the feeding channel is communicated with the feeding hole, coaxial and aligned, and has the same cross section shape, two ends of the intermediary channel are respectively connected with the feeding channel and the discharging hole, the intermediary channel is not coaxial with the feeding channel and the discharging hole, the intermediary channel is inclined outwards relative to the feeding channel, and the joint of the intermediary channel and the feeding channel is the turning part.

Each group of pressure adjusting channels further comprises a discharging channel, the discharging channels are communicated with the discharging holes, are coaxial and aligned, and have the same cross section shape, two ends of the medium channel are respectively connected with the feeding channel and the discharging channel, the medium channel and the discharging channel are not coaxial, and the joint of the medium channel and the discharging channel is the turning part.

Each group of pressure adjusting channels further comprises an intermediate channel and a discharging channel, wherein the discharging channel is communicated with, coaxial and aligned with the discharging hole and has the same cross section shape, two ends of the intermediate channel are respectively connected with the feeding hole and the discharging channel, the intermediate channel is not coaxial with the feeding hole and the discharging channel, and the joint of the intermediate channel and the discharging channel is the turning part.

The sectional area of the feeding hole is smaller than that of the discharging hole, and the sectional areas of the feeding channel and the discharging channel are gradually increased from the feeding end to the discharging end.

The sectional area of the feeding hole is larger than that of the discharging hole, and the sectional areas of the feeding channel and the discharging channel are gradually reduced from the feeding end to the discharging end.

The cross section shapes of the feeding hole and the discharging hole comprise a hexagon and a hexagonal part, or comprise a circle, or comprise a quadrangle.

The two side parts of the discharge hole of the rectifying element have wider sections than the middle part of the discharge hole, and the inner space of the rectifying element is matched with the shape of the discharge hole and gradually changed into the section shape with the middle concave part and two sides expanding at the position close to the discharge hole.

The pressure adjusting element is connected with the discharge hole of the rectifying element through a flow guiding element, the flow guiding element comprises an inner space, a feed inlet and a discharge hole, the inner space of the flow guiding element is communicated with the feed inlet and the discharge hole of the flow guiding element, the feed inlet of the flow guiding element is in butt joint with and communicated with the discharge hole of the rectifying element, the cross section shape of the feed inlet of the flow guiding element corresponds to the cross section shape of the discharge hole of the rectifying element, and the discharge hole of the flow guiding element is in butt joint with and communicated with the feeding area of the pressure adjusting element.

Wherein, the terminal surface of this fairing component is concave to be formed with a ring recess for the periphery of this discharge gate, and the terminal surface of this drainage component sets up suddenly for the periphery of this feed inlet to be formed with a ring flange, and the ring flange butt joint of this drainage component is in this fairing component's ring recess.

Wherein, the periphery that the terminal surface of this drainage component was compared with the discharge gate of this drainage component is indent to be formed with a ring groove, and the one end butt joint of this pressure adjustment component is in this drainage component's ring groove.

The pressure adjusting element is arranged in the forming element, the forming element comprises an inner space, a feeding hole and a discharging hole, the inner space of the forming element forms the single space and is communicated with the feeding hole and the discharging hole of the forming element, and the feeding hole of the forming element is butted with the discharging area of the pressure adjusting element and is communicated with each discharging hole of the discharging area.

Wherein, the periphery of the feeding hole of the forming element is concavely provided with an annular groove, and one end of the pressure adjusting element is butted in the annular groove of the forming element.

Wherein, it further comprises a heat insulation plate which is arranged around the periphery of the feeding hole of the forming element and around the periphery of the discharging area of the pressure adjusting element.

The pressure adjusting element comprises a plurality of sub-pressure adjusting elements, a plurality of groups of pressure adjusting channels of the pressure adjusting elements are arranged in each sub-pressure adjusting element, each sub-pressure adjusting element is in axial butt joint and comprises a front terminal pressure adjusting element closest to the rectifying element and a tail terminal pressure adjusting element connected with the single space, a feeding area of the front terminal pressure adjusting element is connected with a discharging hole of the rectifying element, a discharging area of the rear terminal pressure adjusting element is connected with the single space, and the adjacent sub-pressure adjusting elements are connected with the feeding area of the front sub-pressure adjusting element and the feeding area of the rear sub-pressure adjusting element.

The pressure adjusting element comprises a plurality of sub-pressure adjusting elements, a plurality of groups of pressure adjusting channels of the pressure adjusting elements are arranged in each sub-pressure adjusting element, and the sub-pressure adjusting elements are arranged in a matrix manner and stacked, or sleeved in a concentric circle manner, or arranged in a special shape manner.

The feeding area of each sub-pressure adjusting element is arranged along with the stacking of each sub-pressure adjusting element to form a total feeding area, the discharging area of each sub-pressure adjusting element is arranged along with the stacking of the sub-pressure adjusting elements to form a total discharging area, the total feeding area is connected with the discharging hole of the rectifying element, and the total discharging area is connected with the single space.

The material inlet area of each sub-pressure adjusting element is connected to the material outlet of one rectifying element, the material outlet areas of the sub-pressure adjusting elements are arranged along with the stacking of the sub-pressure adjusting elements to form a total material outlet area, and the total material outlet area is connected with the single space.

The utility model relates to a die head for extrusion molding equipment of foaming material, which is characterized in that a total material flow is guided in by a rectifying element, the total material flow is pressurized in the rectifying element and then enters a pressure adjusting element, a plurality of groups of pressure adjusting channels are arranged in the pressure adjusting element to divide the total material flow into a plurality of branch material flows, each group of pressure adjusting channels is provided with at least one turning part, the cross section of each branch material flow can be adjusted in different sizes independently on the advancing path, so that the branch material flows generate respective pressure adjusting effects when passing through channels with different cross sections, finally, each pressure adjusting channel is gathered to a single space, each branch material flow is gathered to be a set material flow, the volume and pressure limit of the foaming material are completely removed, and the foaming molding can be fully performed to be a finished product, then, by means of the segmentation and independent branch material flow foaming mode, when a finished product with larger expansion volume is obtained, the sectional pressure adjustment can ensure that the foaming material is subjected to progressive foaming molding, so that the phenomenon of foam body rupture caused by insufficient tension of material melt when the foaming material is in place at one time is avoided, and different pressure configurations and different foaming structure differences are caused by changing the sectional areas in the advancing paths through the branch material flows.

The utility model has the advantages of, borrow by the way of doing all can of segmentation adjustment pressure for foam material carries out pressure control through the pressure adjustment passageway that has an at least turn department after branching earlier, gather the step-down in single space afterwards again, and carry out complete inflation shaping, the mode of segmentation pressure adjustment makes foam material's inflation segmentation, then the material can not once expand to the finished product size of wanting, and can avoid foam material to have the cracked phenomenon of bubble body because of the not enough too quick inflation of material fuse-element tension at the in-process of inflation. The physical properties of different densities, different bubble sizes, different bubble wall thicknesses and the like can exist in the same cross section at the same time by changing the cross section size of each independent pressure adjusting channel.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

FIG. 1 is a perspective view of the die head of the extrusion molding apparatus of the present invention;

FIG. 2 is an exploded view of the components of the die head of the extrusion molding apparatus of the present invention;

fig. 3 is an exploded view of another view element of the die head of the extrusion molding apparatus of the present invention;

FIG. 4 is a side sectional view of the die head of the extrusion molding apparatus of the present invention;

FIG. 5 is a top sectional view of the die head of the extrusion molding apparatus of the present invention;

FIG. 6 is a cross-sectional view of the die head of the extrusion molding apparatus of the present invention;

FIG. 7 is an end view of a first embodiment of a pressure adjustment member of a die of an extrusion molding apparatus of the present invention;

FIG. 8 is another end view of a first embodiment of a pressure adjustment member of a die head of an extrusion molding apparatus of the present invention;

FIG. 9 is a top view of a first embodiment of a pressure adjustment member of a die of an extrusion molding apparatus of the present invention;

FIG. 10 is an end view of a second embodiment of a pressure adjustment member of a die of an extrusion molding apparatus of the present invention;

FIG. 11 is another end view of a second embodiment of a pressure adjustment member of a die of an extrusion molding apparatus of the present invention;

FIG. 12 is an end view of a third embodiment of a pressure adjustment member of a die of an extrusion molding apparatus of the present invention;

FIG. 13 is another end view of a third embodiment of a pressure adjustment member of a die of an extrusion molding apparatus of the present invention;

fig. 14 is a schematic view of the expansion forming of the branched material flow of the present invention after entering the forming element;

fig. 15 is an exploded perspective view of a fourth embodiment of the die head of the extrusion molding apparatus of the present invention;

fig. 16 is an exploded perspective view of a fourth embodiment of the die head of the extrusion molding apparatus of the present invention;

fig. 17 is a perspective view of a fifth embodiment of a pressure adjustment element of a die head of an extrusion molding apparatus of the present invention;

fig. 18 is a perspective view from another perspective of a fifth embodiment of a pressure adjustment element of a die head of an extrusion molding apparatus of the present invention;

fig. 19 is a perspective view of a sixth embodiment of a pressure adjustment element of a die head of an extrusion molding apparatus of the present invention;

fig. 20 is a perspective view of a sixth embodiment of a pressure adjustment element of a die of an extrusion molding apparatus of the present invention.

Wherein, the reference numbers:

10 rectifying element

11 inner space

12: feed inlet

13, a discharge hole

131 two side parts

132 middle part

14 annular groove

20. 20C drainage element

21 inner space

22: feed inlet

23. 23C, discharge hole

24: ring flange

25 annular groove

30 pressure adjusting element

300 pressure regulating channel

301 feeding area

302 discharge area

31. 31A, 31B feed holes

32: a feeding channel

33 intermediate channel

34 discharge passage

35. 35A, 35B discharge holes

40. 40C forming element

41 inner space

42. 42C, a feed inlet

43 discharge hole

44 ring groove

50: heat insulation board

60 front terminal pressure adjusting element

61: feeding zone

611, a feeding hole

62 discharge area

621 discharge hole

70 terminal pressure adjusting element

71 material feeding area

711 feeding hole

72 discharge area

721 discharge hole

80 sub-pressure adjusting element

81: feeding area

Total feed area 810

82 discharge area

820 Total discharge area

90 sub-pressure adjusting element

91 feeding area

910 Total feed area

92 discharge area

920 Total discharge area

Detailed Description

The technical solutions adopted by the present invention to achieve the objects of the present invention will be further described below in conjunction with the drawings and the embodiments of the present invention, wherein the drawings have been simplified for illustrative purposes only, and the structures or methods of the present invention will be described by describing the elements and the relationships between the elements, so that the elements shown in the drawings are not represented in actual numbers, actual shapes, actual sizes, and actual proportions, and the dimensions or size proportions have been enlarged or simplified, thereby providing better illustrations, and the actual numbers, actual shapes, or actual size proportions have been selectively designed and arranged, and the detailed layout of the elements may be more complicated.

Referring to fig. 1 to 2, the die head of the extrusion molding apparatus for foaming material of the present invention includes a rectifying element 10, a flow guiding element 20, a pressure adjusting element 30 and a molding element 40. The aforementioned components may be integrally formed as a single component, or may be separately formed as independent components, and when forming the independent components, the fixing manner between the components is by means of bolts, rivets or other connecting members, which will not be described herein.

Referring to fig. 2 to 5, the rectifying device 10 includes an inner space 11, a feeding port 12 and a discharging port 13, the inner space 11 is respectively connected to the feeding port 12 and the discharging port 13, the discharging port 13 is connected to the cross-sectional shape of the end product, the feeding port 12 is connected to the cross-sectional shape of the material flow supply source, and the inner space 11 provides a cross-sectional transition buffer space from the feeding port 12 to the discharging port 13. For example, the inlet 12 is circular, and the cross section of the end product is a rectangle with a long transverse direction, so that the inner space 11 has a gradually decreasing cross section from the inlet 12 to the outlet 13. In one embodiment, the longitudinal height H1 of the inner space 11 is gradually narrowed from the outlet 13 at the inlet 12, and the transverse width W1 of the inner space 11 is gradually widened from the outlet 13 at the inlet 12, but the variation degree of the longitudinal height H1 is larger than that of the transverse width W1. In an embodiment, the two side portions 131 of the discharge opening 13 have a wider cross section than the middle portion 132 of the discharge opening 13, taking fig. 2 as an example, the discharge opening 13 has a cross section with a concave middle portion 132 and two expanded side portions 131, and the shape of the inner space 11 and the discharge opening 13 gradually changes to the cross section with a concave middle portion and two expanded side portions near the discharge opening 13. In one embodiment, the end surface of the rectifying element 10 is recessed relative to the periphery of the discharge hole 13 to form a ring groove 14.

The flow of the foamed material enters the inner space 11 of the rectifying element 10 from the inlet opening 12 of the rectifying element 10, and the internal pressure in the flow gradually increases due to the gradually reduced cross-sectional area of the inner space 11. Further, generally, when the fluid flows, the flow velocity is faster at the center than at the two sides, so that the two side portions 131 of the discharge port 13 have wider cross sections than the middle portion 132 of the discharge port 13, and the flow velocities at the center and the two sides can be adjusted to be consistent by the difference of the cross sections.

Referring to fig. 2 to 6, the flow guiding element 20 is connected to the discharge hole 13 of the rectifying element 10, the flow guiding element 20 includes an inner space 21, a feed opening 22 and a discharge hole 23, the inner space 21 of the flow guiding element 20 is communicated with the feed opening 22 and the discharge hole 23 of the flow guiding element 20, the feed opening 22 of the flow guiding element 20 is connected to and communicated with the discharge hole 13 of the rectifying element 10, a transverse width W2 of the inner space 21 of the flow guiding element 20 is gradually wider from the feed opening 22 to the discharge hole 23, but a longitudinal height H2 of the inner space 21 of the flow guiding element 20 at two sides (as shown in the sectional view of fig. 6) is gradually narrower from the feed opening 22 to the discharge hole 23. In one embodiment, the cross-sectional shape of the inlet opening 22 of the flow-guiding element 20 is the same as the cross-sectional shape of the outlet opening 13 of the flow-straightening element 10. In an embodiment, an annular flange 24 is formed on the end surface of the flow-guiding element 20 protruding from the periphery of the inlet 22, and the annular flange 24 of the flow-guiding element 20 is abutted in the annular groove 14 of the rectifying element 10, so that the inlet 22 of the flow-guiding element 20 and the outlet 13 of the rectifying element 10 can be quickly aligned and abutted. In one embodiment, the end surface of the flow-guiding element 20 is recessed with respect to the periphery of the discharge opening 23 to form an annular groove 25.

When the flow of foamed material passes through the flow-directing element 20, the cross-sectional shape of the flow is finished by the change in shape of the interior space 21 of the flow-directing element 20.

Referring to fig. 2 to 4, the pressure adjusting element 30 is connected to the discharge hole 23 of the drainage element 20, and in one embodiment, one end of the pressure adjusting element 30 is abutted in the annular groove 25 of the drainage element 20. The pressure adjustment element 30 includes a plurality of pressure adjustment channels 300, each pressure adjustment channel 300 having at least one turn to control the material flow in the same cross-sectional shape at the inlet or outlet section, wherein the central pressure adjustment channel 300 may not have a turn. Referring to fig. 7 to 8, in the present embodiment, each set of pressure adjustment channels 300 includes a feeding hole 31, a feeding channel 32, an intermediate channel 33, a discharging channel 34, and a discharging hole 35, which are sequentially connected, and the cross-sectional shape of the feeding hole 31 is the same as the cross-sectional shape of the discharging hole 35. The material inlet channel 32 and the material inlet hole 31 are coaxial and aligned and have the same cross-sectional shape, the material outlet channel 34 and the material outlet hole 35 are coaxial and aligned and have the same cross-sectional shape, two ends of the intermediate channel 33 are respectively connected with the material inlet channel 32 and the material outlet channel 34, the intermediate channel 33 is not coaxial with the material inlet channel 32 and the material outlet channel 34, so that the material inlet channel 32 and the material outlet channel 34 of each set of pressure adjusting channels 300 are not aligned, the intermediate channel 33 inclines outwards compared with the material inlet channel 32, specifically, the intermediate channel 33 and the material inlet channel 32 form an included angle theta 1 smaller than 180 degrees, and the intermediate channel 33 and the material outlet channel 34 form an included angle theta 2 larger than 180 degrees. The material inlet holes 31 of the pressure adjusting channels 300 are communicated with the material outlet 23 of the flow guiding element 20, the material inlet holes 31 of the pressure adjusting channels 300 are adjacently arranged and arranged as a material inlet area 301, and in an embodiment, the wall thickness between the adjacent material inlet holes 31 is set to be the thinnest as possible within the allowable range of materials. The feeding area 301 is connected and communicated with the discharge port 23 of the flow guiding element 20, the shape of the feeding area 301 corresponds to the shape of the discharge port 23 of the flow guiding element 20, the discharge holes 35 of the pressure adjusting channels 300 are arranged in a dispersed manner and are arranged as a discharge area 302, and the distribution area of the discharge area 302 is larger than that of the feeding area 301. That is, the intermediate channel 33 is inclined outward and is not coaxial with the material inlet channel 32 and the material outlet channel 34, so as to pull the distance between the material outlet holes 35, and the material outlet holes 35 can be arranged in the material outlet area 302 with a larger area. In an embodiment, the flow guiding element 20 may not be provided, and the pressure adjusting element 30 is directly connected to the rectifying element 10 in a butt joint manner, the shape of the discharge port 13 of the rectifying element 10 corresponds to the shape of the feeding region 301, and the discharge port 13 of the rectifying element 10 is connected to and communicated with the feeding region 301 of the pressure adjusting element 30 in a butt joint manner.

For each set of pressure-regulating channels 300, since the covering area of the discharging area 302 needs to be expanded by the obliquely disposed intermediate channel 33, but the obliquely disposed intermediate channel 33 tends to deform in cross-sectional shape, the cross-sectional shape of the material flow of the foaming material can be controlled by the same cross-sectional shape of the feeding hole 31 and the feeding channel 32 and the same cross-sectional shape of the discharging hole 35 and the discharging channel 34, so as to achieve the effect of rectification. In one embodiment, there may be only an inlet channel 32 or only an outlet channel 34.

Further, when the material flow of the foaming material enters the feeding region 301 of the pressure adjusting element 30 from the discharge port 23 of the flow guiding element 20, the material flow is divided into a plurality of branch material flows by the arrangement of the plurality of feeding holes 31, and then the branch material flows are subjected to the design of the sectional areas of the feeding holes 31 and the feeding channels 32, and the discharging channels 34 and the discharging holes 35 changing during the process of passing through the pressure adjusting channel 300, so that the pressures of the branch material flows can be adjusted for different melt tensions of the foaming material. In an embodiment, the sectional area of the material inlet 31 is smaller than the sectional area of the material outlet 35, the ratio of the sectional area of the material outlet 35 to the sectional area of the material inlet 31 is 1.5 to 3, and the sectional areas of the material inlet channel 32 and the material outlet channel 34 are gradually increased, so as to be suitable for a foaming material with a smaller melt tension, so that the foaming material is subjected to step-down pressure in a process of passing through the pressure adjusting channel 300, but the sectional area of the intermediate channel 33 is not limited, and can be kept consistent, or gradually increased, or gradually decreased. In another embodiment, the sectional area of the inlet hole 31 is larger than the sectional area of the outlet hole 35, the ratio of the sectional area of the inlet hole 31 to the sectional area of the outlet hole 35 is 1.5 to 3, and the sectional areas of the inlet channel 32 and the outlet channel 34 are gradually reduced to be suitable for the foaming material with larger melt tension, so that the foaming material is gradually pressurized while riding through the pressure adjusting channel 300, but the sectional area of the intermediate channel 33 is not limited and can be kept consistent, or gradually increased, or gradually reduced.

The material inlet 31 and the material outlet 35 of the pressure adjusting channel 300 of the pressure adjusting member 30 can be designed with various cross-sectional shapes, as shown in fig. 7 and 8, the cross-sectional shapes of the material inlet 31 and the material outlet 35 are regular hexagons or regular hexagons; as shown in fig. 10 and 11, the cross-sectional shapes of the feeding hole 31A and the discharging hole 35A are circular; as shown in fig. 12 and 13, the cross-sectional shapes of the material inlet 31B and the material outlet 35B are quadrilateral, but the present invention is not limited thereto.

Referring to fig. 2 to 5, the forming element 40 is connected to the discharging area 302 of the pressure adjusting element 30, the forming element 40 includes an inner space 41, a feeding opening 42 and a discharging opening 43, the inner space 41 of the forming element 40 is connected to the feeding opening 42 and the discharging opening 43 of the forming element 40, and the feeding opening 42 of the forming element 40 is connected to the discharging area 302 of the pressure adjusting element 30 and is connected to the discharging holes 35 of the discharging area 302. In one embodiment, the feed port 42 of the forming member 40 is recessed with an annular groove 44, and one end of the pressure adjusting member 30 abuts against the annular groove 44 of the forming member 40. In one embodiment, a heat shield 50 surrounds the periphery of the inlet 42 of the forming member 40 and the periphery of the outlet area 302 of the pressure adjustment member 30 to isolate heat transfer between the forming member 40 and the pressure adjustment member 30.

After the branch material flows enter the inner space 41 of the forming element 40, the restriction is lost, the pressure is completely reduced, the foaming expansion forming is started, each branch material flow and the adjacent branch material flow are subjected to foaming expansion forming to form butt joint, and finally, a complete foaming formed finished product is formed, so that the cross-sectional shapes of the feeding hole and the discharging hole influence the outward expanding shape of each branch material flow during the final foaming expansion forming and the joint surface of the butt joint with the adjacent branch material flow, and further influence the bonding strength of each branch material flow after forming. Taking the cross-sectional shape of the regular hexagon or the regular hexagon as an example, please refer to fig. 14, each branch material flow MF at the final discharging position is in the cross-sectional shape of the hexagon or the hexagonal portion according to the cross-sectional shape of the discharging hole 35A, and starts to expand and expand outward from each side, when the branch material flows MF adjacent to each direction are expanded to be in butt joint, the butt joint surfaces of the branch material flows MF adjacent to each direction are distributed in different angular directions by butt joint of the surfaces, based on the non-perpendicular relation of the included angle of each side of the hexagon, that is, compared with each surface of the final structure, the butt joint surfaces of each branch material flow MF are distributed in different angular directions, whether perpendicular to each surface, parallel to each surface, or neither perpendicular to or parallel to each surface, and when the final structure is subjected to an external force from any direction, the internal structure is based on the butt joint surfaces of each different angle, can bear the external force action in all directions, and the phenomenon that the structure is particularly fragile in a specific direction is avoided. Furthermore, by arranging the intermediate channel 33, the feeding channel 32 and the discharging channel 34 in a non-coaxial manner, and arranging the feeding hole 31 and the feeding channel 32 coaxially, and arranging the discharging hole 35 and the discharging channel 34 coaxially, the cross-sectional shape of the discharged branch material flow can be free from the influence of the cross-sectional shape deformed by the inclination of the intermediate channel 33, and the cross-sectional shape of the desired branch material flow MF can still be limited by the cross-sectional shapes of the discharging hole 35 and the discharging channel 34 on the premise of expanding the area of the discharging area 302.

Further, the die head of the extrusion molding apparatus of the present invention may include a plurality of front-end pressure adjustment subassemblies to form the aforementioned pressure adjustment element, and a plurality of implementation modes are provided below, but the present invention is not limited thereto.

Referring to fig. 15 and 16, the pressure adjustment element 30C includes a plurality of axially butted sub-pressure adjustment elements (in the present embodiment, two sub-pressure adjustment elements are taken as an example, but not limited thereto), and the detailed structure of each sub-pressure adjustment element is as that of the pressure adjustment element 30 shown in fig. 2 to 9, which is not described again. The sub-pressure adjusting elements include a front terminal pressure adjusting element 60 closest to the flow-guiding element 20C and a rear terminal pressure adjusting element 70 closest to the forming element 40C, the material inlet region 61 of the front terminal pressure adjusting element 60 is in butt joint with and communicated with the material outlet 23C of the flow-guiding element 20C, the material outlet region 72 of the rear terminal pressure adjusting element 70 is in butt joint with and communicated with the material inlet 42C of the forming element 40C, and the material outlet region 62 of the front terminal pressure adjusting element 60 is in butt joint with, communicated with and shaped to the material inlet region 71 of the adjacent second component 70. The ratio of the cross-sectional area of each discharging hole 621 of the discharging area 62 of the front terminal pressure adjusting element 60 to the cross-sectional area of each feeding hole 611 of the feeding area 61 thereof is 1.5 to 3, the ratio of the cross-sectional area of each discharging hole 721 of the discharging area 72 of the rear terminal pressure adjusting element 70 to the cross-sectional area of each feeding hole 711 of the feeding area 71 thereof is 1.5 to 3, and the ratio of the cross-sectional area of each discharging hole 621 of the discharging area 62 of the front terminal pressure adjusting element 60 to the cross-sectional area of each feeding hole 711 of the feeding area 71 of the rear terminal pressure adjusting element 70 is 1 to 1.2. That is, the cross-sectional area of the branch material flow flowing through each pressure adjusting channel is assumed to be a at first, from the feeding region 61 of the front terminal pressure adjusting element 60 to the discharging region 62 of the front terminal pressure adjusting element 60, the cross-sectional area of each branch material flow becomes larger to 1.5A to 3A, then to the feeding region 71 of the terminal pressure adjusting element 70, the cross-sectional area of each branch material flow remains unchanged to 1.5A to 3A, or slightly decreases to 1.23A to 2.5A, and finally to the discharging region 72 of the terminal pressure adjusting element 70, the cross-sectional area of each branch material flow becomes larger to 2.25A to 9A, or 1.845A to 7.5A. In this embodiment, the branched stream generates a first stage of depressurization based on the change in cross-sectional area when entering the leading terminal pressure adjusting element 60, and a second stage of depressurization based on the change in cross-sectional area when entering the trailing terminal pressure adjusting element 70.

Referring to fig. 17 and 18, the pressure adjustment element 30D includes a plurality of sub-pressure adjustment elements 80 stacked in a matrix arrangement (in the present embodiment, six sub-pressure adjustment elements are taken as an example, but not limited thereto), and the detailed structure of each sub-pressure adjustment element 80 is as that of the pressure adjustment element 30 shown in fig. 2 to 9, which is not described again. The feeding regions 81 of the sub-pressure adjusting elements 80 are arranged to form a total feeding region 810 along with the stacking of the sub-pressure adjusting elements 80, and the discharging regions 82 of the sub-pressure adjusting elements 80 are arranged to form a total discharging region 820 along with the stacking of the sub-pressure adjusting elements 80. In one embodiment, the total inlet region 810 formed by the sub-pressure adjustment elements 80 is connected to and communicates with the outlet of the single flow directing element, and the total outlet region 820 formed by the sub-pressure adjustment elements 80 is connected to and communicates with the inlet of the single forming element, so that the material flow can be distributed to a wider area range by the stacked sub-pressure adjustment elements 80. In one embodiment, the feeding regions 81 of the sub-pressure adjusting elements 80 are respectively connected to the outlets of different flow guiding elements, and the total discharging region 820 of the sub-pressure adjusting elements 80 is connected to the inlet of a single forming element, so that different flow guiding elements can guide different material or different color material flows, and the final product can be formed by different material, different color, different density, different bubble size, or different bubble wall thickness at different positions.

Referring to fig. 19 and 20, the pressure adjustment element 30E includes a plurality of sub-pressure adjustment elements 90 (in the present embodiment, two sub-pressure adjustment elements are taken as an example, but not limited thereto) that are concentrically arranged and sleeved, and the detailed structure of each sub-pressure adjustment element 90 is as that of the pressure adjustment element 30 shown in fig. 2 to 9, which is not described again. The feeding regions 91 of the sub-pressure adjusting elements 90 are arranged to form a total feeding region 910 along with the sleeving of the sub-pressure adjusting elements 90, and the discharging regions 92 of the sub-pressure adjusting elements 90 are arranged to form a total discharging region 920 along with the sleeving of the sub-pressure adjusting elements 90. In one embodiment, the total material inlet region 910 formed by the sub-pressure adjusting devices 90 is connected to and communicated with the material outlet of the single flow guiding device, and the total material outlet region 20 formed by the sub-pressure adjusting devices 90 is connected to and communicated with the material inlet of the single forming device, so that the material flow can be distributed to a wider area range by the sleeved sub-pressure adjusting devices 90. In one embodiment, the feeding regions 91 of the sub-pressure adjusting elements 90 are respectively connected to the discharge ports of different flow guiding elements, and the total discharging region 920 of the sub-pressure adjusting elements 90 is connected to the feed port of a single forming element, so that different flow guiding elements can introduce different material or different color material streams, and different positions of the inner and outer rings of the final product formed by discharging are made of different materials or different colors or different densities or different bubble sizes or different bubble wall thicknesses, and the final product made of different materials or structures or made of different colors can be manufactured according to the manufacturing requirements.

Furthermore, the plurality of sub-pressure adjusting elements can also be arranged in a special shape, namely, arranged in a required shape without any specific shape limitation.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention in any way, and the present invention has been disclosed in the above embodiments, but not limited to the above embodiments, and any person who knows commonly in any technical field can make modifications or equivalent changes within the scope of the technical solution of the present invention.

Of course, the present invention can have other embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides a die head of extrusion molding equipment of expanded material which characterized in that, it includes:

2. The die head of claim 1, wherein each set of pressure adjustment channels further comprises a feeding channel and an intermediate channel, the feeding channel is in communication with, coaxial with and aligned with the feeding hole, and has the same cross-sectional shape, two ends of the intermediate channel are respectively connected to the feeding channel and the discharging hole, the intermediate channel is not coaxial with both the feeding channel and the discharging hole, the intermediate channel is inclined outward relative to the feeding channel, and the connection between the intermediate channel and the feeding channel is the turning point.

3. The die head of claim 2, wherein each set of pressure adjustment channels further comprises a discharge channel, the discharge channel is connected to, coaxial with and aligned with the discharge hole, and has the same cross-sectional shape, two ends of the intermediate channel are respectively connected to the feeding channel and the discharge channel, the intermediate channel is not coaxial with the discharge channel, and the connection between the intermediate channel and the discharge channel is the turning point.

4. The die head of claim 1, wherein each set of pressure adjustment channels further comprises an intermediate channel and a discharge channel, the discharge channel is connected to, coaxial with and aligned with the discharge hole, and has the same cross-sectional shape, both ends of the intermediate channel are respectively connected to the feeding hole and the discharge channel, the intermediate channel is not coaxial with both the feeding hole and the discharge channel, and the connection between the intermediate channel and the discharge channel is the turning point.

5. The die head of claim 3, wherein the cross-sectional area of the inlet is smaller than the cross-sectional area of the outlet, and the cross-sectional areas of the inlet and outlet channels are gradually increased from the inlet end to the outlet end.

6. The die head of claim 3, wherein the cross-sectional area of the inlet is larger than the cross-sectional area of the outlet, and the cross-sectional areas of the inlet channel and the outlet channel are gradually reduced from the inlet end to the outlet end.

7. The die head of the extrusion molding apparatus for foaming material according to claim 1, wherein the cross-sectional shapes of the inlet hole and the outlet hole include hexagonal parts, circular parts, or quadrangular parts.

8. The die head of claim 1, wherein the two side portions of the discharge port of the rectifying element have a wider cross section than the middle portion of the discharge port, and the inner space of the rectifying element is adapted to the shape of the discharge port and gradually changes to a cross section shape that is concave in the middle and expanded at two sides near the discharge port.

9. The die head of the extrusion molding apparatus for foaming material according to any one of claims 1 to 8, wherein the pressure adjusting element is connected to the discharge port of the rectifying element through a flow guiding element, the flow guiding element comprises an inner space, a feed port and a discharge port, the inner space of the flow guiding element is connected to the feed port and the discharge port of the flow guiding element, the feed port of the flow guiding element is connected to and communicated with the discharge port of the rectifying element, the cross-sectional shape of the feed port of the flow guiding element corresponds to the cross-sectional shape of the discharge port of the rectifying element, and the discharge port of the flow guiding element is connected to and communicated with the feeding region of the pressure adjusting element.

10. The die head of claim 9, wherein the end surface of the flow-guiding member is recessed relative to the periphery of the discharge port to form a ring groove, the end surface of the flow-guiding member is protruded relative to the periphery of the feed port to form a ring flange, and the ring flange of the flow-guiding member is abutted against the ring groove of the flow-guiding member.

11. The die head of claim 9, wherein the end surface of the flow guiding element is recessed relative to the periphery of the discharge port of the flow guiding element to form an annular groove, and one end of the pressure adjusting element is abutted in the annular groove of the flow guiding element.

12. The die head of the extruding and forming apparatus of foamed material according to any one of claims 1 to 8, wherein the discharging region of the pressure adjusting member is connected to a forming member, the forming member includes an inner space, a feeding opening and a discharging opening, the inner space of the forming member forms the single space and is connected to the feeding opening and the discharging opening of the forming member, and the feeding opening of the forming member is connected to the discharging region of the pressure adjusting member and is connected to the discharging openings of the discharging region.

13. The die head of claim 12, wherein the periphery of the inlet of the forming member is recessed to form a ring groove, and one end of the pressure adjusting member abuts against the ring groove of the forming member.

14. The die of claim 12, further comprising a heat-insulating plate surrounding the periphery of the inlet of the forming member and the periphery of the outlet of the pressure-adjusting member.

15. The die head of the extrusion molding apparatus for foaming material according to any one of claims 1 to 8, wherein the pressure adjustment member comprises a plurality of sub-pressure adjustment members, the plurality of sets of pressure adjustment channels of the pressure adjustment member are disposed in each sub-pressure adjustment member, each sub-pressure adjustment member is axially butted, and the sub-pressure adjustment members comprise a front terminal pressure adjustment member closest to the rectifying member and a rear terminal pressure adjustment member connected to the single space, the feeding region of the front terminal pressure adjustment member is connected to the discharging port of the rectifying member, the discharging region of the rear terminal pressure adjustment member is connected to the single space, and the adjacent sub-pressure adjustment members are connected to the feeding region of the front sub-pressure adjustment member and the feeding region of the rear sub-pressure adjustment member.

16. The die head of the extruding and forming apparatus for foamed material according to any one of claims 1 to 8, wherein the pressure regulating member comprises a plurality of sub-pressure regulating members, the plurality of pressure regulating channels of the pressure regulating member are disposed in each sub-pressure regulating member, and each sub-pressure regulating member is stacked in a matrix arrangement, or sleeved in a concentric circle, or arranged in a special shape.

17. The die head of claim 16, wherein the feeding regions of the sub-pressure adjustment members are arranged to form a total feeding region, the discharging regions of the sub-pressure adjustment members are arranged to form a total discharging region, the total feeding region is connected to the discharging opening of the rectifying member, and the total discharging region is connected to the single space.

18. The die head of claim 16, wherein the rectifying elements are arranged in a plurality, wherein the inlet region of each sub-pressure adjusting element is connected to the outlet of one of the rectifying elements, and the outlet regions of the sub-pressure adjusting elements are arranged in a stack to form a total outlet region, and the total outlet region is connected to the single space.