CN202685273U - Cross-linked polyolefin foam material extrusion die - Google Patents
Cross-linked polyolefin foam material extrusion die Download PDFInfo
- Publication number
- CN202685273U CN202685273U CN2012203675255U CN201220367525U CN202685273U CN 202685273 U CN202685273 U CN 202685273U CN 2012203675255 U CN2012203675255 U CN 2012203675255U CN 201220367525 U CN201220367525 U CN 201220367525U CN 202685273 U CN202685273 U CN 202685273U
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- die
- prestressing force
- cavity
- melt
- cope match
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- 229920000098 polyolefin Polymers 0.000 title claims abstract description 26
- 238000001125 extrusion Methods 0.000 title claims abstract description 20
- 239000006261 foam material Substances 0.000 title abstract 4
- 230000001105 regulatory effect Effects 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 14
- 239000006260 foam Substances 0.000 claims description 12
- 230000000694 effects Effects 0.000 claims description 6
- 239000007769 metal material Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 abstract description 7
- 230000001276 controlling effect Effects 0.000 abstract 1
- 229920003023 plastic Polymers 0.000 description 5
- 239000004033 plastic Substances 0.000 description 5
- 208000002925 dental caries Diseases 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000005187 foaming Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model discloses a cross-linked polyolefin foam material extrusion die. The cross-linked polyolefin foam material extrusion die comprises an upper die plate, a lower die plate, a fixed plate, a fixing bolt, a prestressed strip, a prestressed regulating bolt and a die lip gap regulating bolt, wherein clothes hanger type concave cavities are respectively arranged on the combination surfaces of the upper die plate and the lower die plate, and the two concave cavities are correspondingly combined together for forming a clothes hanger type die cavity; the prestressed strip is arranged at the middle part of the concave cavity on the upper die plate, and the two ends of the prestressed strip are fixed in the concave cavity of the upper die plate; the prestressed strip can regulate the height exposed outside the concave cavity of the upper die plate under the action of the prestressed regulating bolt; feed openings which are corresponding respectively are arranged at the back ends of the upper die plate and the lower die plate for enabling a raw material melt to enter into the die; and the die lip gap regulating bolt is arranged in the position of a die lip for controlling a die lip gap. After the polyolefin melt passes through the prestressed strip, because the different heights of the prestressed strip have different actions against the flow resistance of the melt, the pressure on the melt along the width direction of the melt is consistent basically, the die outlet expansion ratio of the melt after being extruded through the die lip is also consistent, the internal stress of a polyolefin master slice is reduced, and the quality of a polyolefin foam material is also improved.
Description
Technical field
The utility model relates to a kind of extrusion die, refers in particular to a kind of cross-linked foam polyolefin material extrusion die.
Background technology
The TPO foamed plastics is widely used, and also is one of foamed plastics that successfully makes the earliest.As far back as nineteen forty-one, du pont company just utilizes the nitrogen method successfully to prepare the LDPE foamed plastics.Through the development of decades, foamed polyolefine plastic is full-fledged, has realized variation in kind and application facet.Along with deepening continuously and the progress of foaming technique of theoretical research, foamed plastics is having significant progress aspect output and the quality.
Polyolefin foam is most to be the serialization extrusion molding.In process of production, extruder die head can affect thickness, width of the polyolefin master slice of extruding etc.Particularly gauge is inhomogeneous, quality for the polyolefin master slice has a great impact, because macromolecular material is the non-conductor of heat, it is longer that the position internal material that gauge is larger arrives the blowing temperature required time, and that the less position internal material of gauge arrives the blowing temperature required time is shorter, the uniformity coefficient of impact foaming.The general method of regulating the die lip gap that adopts reaches unanimity thickness at present, but because the extrusion pressure of extruder die head central area is large, less near die head two side areas extrusion pressure, the depanning expansion ratio is larger in the middle of causing, both sides are less, after the calendering typing that stretches, in the inner internal stress that forms of polyolefin master slice, make product that serious fold occur, become waste product.
For addressing the above problem, the utility model has carried out having improved product quality to the extrusion die of cross-linked foam polyolefin material.
Summary of the invention
The utility model provides a kind of simple in structure, easy to operate cross-linked foam polyolefin material extrusion die in order to remedy the deficiencies in the prior art.
The utility model is achieved by the following technical solution:
A kind of cross-linked foam polyolefin material extrusion die is characterized in that: comprise cope match-plate pattern, lower bolster, fixed head, set bolt, prestressing force bar, prestressing force adjusting bolt and die lip gap adjustment bolt; On the faying face of cope match-plate pattern and lower bolster, the rack-style cavity is arranged respectively, two cavity correspondences form the rack-style die cavity together; Cavity middle part on the cope match-plate pattern has prestressing force bar, the two ends of prestressing force bar to be fixed in the cope match-plate pattern cavity; The prestressing force bar can under the effect of prestressing force adjusting bolt, be regulated the height that exposes the cope match-plate pattern cavity; In the rear end of cope match-plate pattern and lower bolster corresponding respectively charging hole is arranged all, enter mould for the raw material melt; Die lip gap adjustment bolt is arranged at the die lip place, be used for control die lip gap.
Described prestressing force bar is to be made by the good metal material of elasticity; Described charging hole, it is shaped as semicircle, half elliptic or partly square.
The beneficial effects of the utility model are: polyolefin melt is through behind the extrusion die prestressing force bar of the present utility model, because the differing heights of prestressing force bar is different to the flow resistance effect of melt, so that basically identical along the melt pressure of die width direction, depanning expansion ratio after melt is extruded by die lip is also consistent, reduce the internal stress of polyolefin master slice, improved the foam polyolefin material quality.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further described.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the generalized section of A-A direction among Fig. 1.
Among the figure: 1 fixed head, 2 cope match-plate patterns, 3 set bolts, 4 prestressing force adjusting bolts, 5 die lip gap adjustment bolts, 6 lower bolsters, 7 charging holes, 8 prestressing force bars, 9 rack-style die cavitys.
The specific embodiment
Below in conjunction with accompanying drawing and the specific embodiment, the utility model is described further.Accompanying drawing is a kind of specific embodiment of the present utility model.This embodiment is a kind of cross-linked foam polyolefin material extrusion die, it is characterized in that: comprise cope match-plate pattern 2, lower bolster 6, fixed head 1, set bolt 3, prestressing force bar 8, prestressing force adjusting bolt 4 and die lip gap adjustment bolt 5; On the faying face of cope match-plate pattern 2 and lower bolster 6, the rack-style cavity is arranged respectively, two cavity correspondences form rack-style die cavity 9 together; Cavity middle part on the cope match-plate pattern 2 has prestressing force bar 8, the two ends of prestressing force bar 8 to be fixed in cope match-plate pattern 2 cavitys; Prestressing force bar 8 can under the effect of prestressing force adjusting bolt 4, be regulated the height that exposes cope match-plate pattern 2 cavitys; In the rear end of cope match-plate pattern 2 and lower bolster 6 corresponding respectively charging hole 7 is arranged all, enter mould for the raw material melt; Die lip gap adjustment bolt 5 is arranged at the die lip place, be used for control die lip gap.Described prestressing force bar 8 is to be made by the good metal material of elasticity; Described charging hole 7, it is shaped as semicircle, half elliptic or partly square.
A kind of cross-linked foam polyolefin material extrusion die as shown in Figure 1 and Figure 2 has the fixed head 1 at cope match-plate pattern 2, lower bolster 6 and two ends.The hole of rack-style cavity and rear end is arranged on the inner surface of cope match-plate pattern 2 and lower bolster 6, and bolster is combined, and forms rack-style die cavity 9 and charging hole 7.There is prestressing force bar 8 at cavity middle part on cope match-plate pattern 2, and prestressing force bar 8 two ends are fixed in the cope match-plate pattern cavity.Prestressing force bar 8 can under the effect of prestressing force adjusting bolt 4, be regulated the height that exposes the cope match-plate pattern cavity.The polyolefin raw material become melt through the plasticizing of extruder, enter extrusion die by charging hole 7 after, the each several part of regulating prestressing force bars 8 by prestressing force adjusting bolt 4 this moment exposes the height of cope match-plate pattern 2 cavitys.Mould central authorities then can also heighten the height of prestressing force bar 8 because extrusion pressure is larger, and are just larger to the flow resistance of melt.Near the mould both sides, extrusion pressure is less, then the height of prestressing force bar 8 is also turned down, and is just less to the flow resistance of melt.Behind the melt process prestressing force bar 8, because the differing heights of prestressing force bar 8 is different to the flow resistance effect of melt, so that basically identical along the melt pressure of die width direction, depanning expansion ratio after melt is extruded by die lip is also consistent, thereby reduced the internal stress of polyolefin master slice, improved the foam polyolefin material quality.
Claims (2)
1. a cross-linked foam polyolefin material extrusion die is characterized in that: comprise cope match-plate pattern (2), lower bolster (6), fixed head (1), set bolt (3), prestressing force bar (8), prestressing force adjusting bolt (4) and die lip gap adjustment bolt (5); On the faying face of cope match-plate pattern (2) and lower bolster (6), the rack-style cavity is arranged respectively, two cavity correspondences form rack-style die cavity (9) together; Cavity middle part on the cope match-plate pattern (2) has prestressing force bar (8), the two ends of prestressing force bar (8) to be fixed in cope match-plate pattern (2) cavity; Prestressing force bar (8) can under the effect of prestressing force adjusting bolt (4), be regulated the height that exposes cope match-plate pattern (2) cavity; In the rear end of cope match-plate pattern (2) and lower bolster (6) corresponding respectively charging hole (7) is arranged all, enter mould for the raw material melt; Die lip gap adjustment bolt (5) is arranged at the die lip place, be used for control die lip gap.
2. cross-linked foam polyolefin material extrusion die according to claim 1, it is characterized in that: described prestressing force bar (8) is to be made by the good metal material of elasticity; Described charging hole (7), it is shaped as semicircle, half elliptic or partly square.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203675255U CN202685273U (en) | 2012-07-27 | 2012-07-27 | Cross-linked polyolefin foam material extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012203675255U CN202685273U (en) | 2012-07-27 | 2012-07-27 | Cross-linked polyolefin foam material extrusion die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202685273U true CN202685273U (en) | 2013-01-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012203675255U Expired - Fee Related CN202685273U (en) | 2012-07-27 | 2012-07-27 | Cross-linked polyolefin foam material extrusion die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202685273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524834A (en) * | 2019-09-30 | 2019-12-03 | 湖北安信塑料模具有限公司 | A kind of crack resistence wood moulding extrusion die |
| CN118700488A (en) * | 2024-07-16 | 2024-09-27 | 苏州棠裕塑胶机械有限公司 | A GPPS sheet extrusion die |
-
2012
- 2012-07-27 CN CN2012203675255U patent/CN202685273U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524834A (en) * | 2019-09-30 | 2019-12-03 | 湖北安信塑料模具有限公司 | A kind of crack resistence wood moulding extrusion die |
| CN118700488A (en) * | 2024-07-16 | 2024-09-27 | 苏州棠裕塑胶机械有限公司 | A GPPS sheet extrusion die |
| CN118700488B (en) * | 2024-07-16 | 2024-12-27 | 苏州棠裕塑胶机械有限公司 | A GPPS sheet extrusion die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20200727 |