CN108527817A - A kind of differential method crystallization enhancing PP material cortex intensity methods - Google Patents
A kind of differential method crystallization enhancing PP material cortex intensity methods Download PDFInfo
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- CN108527817A CN108527817A CN201810329633.5A CN201810329633A CN108527817A CN 108527817 A CN108527817 A CN 108527817A CN 201810329633 A CN201810329633 A CN 201810329633A CN 108527817 A CN108527817 A CN 108527817A
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- 238000000034 method Methods 0.000 title claims abstract description 75
- 239000000463 material Substances 0.000 title claims abstract description 61
- 238000002425 crystallisation Methods 0.000 title claims abstract description 50
- 230000008025 crystallization Effects 0.000 title claims abstract description 50
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 49
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 53
- 238000007493 shaping process Methods 0.000 claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 239000000155 melt Substances 0.000 claims abstract description 8
- 238000009825 accumulation Methods 0.000 claims abstract description 6
- 238000001125 extrusion Methods 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 25
- 238000004458 analytical method Methods 0.000 claims description 13
- 230000000694 effects Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 238000010792 warming Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007385 chemical modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
- B29C48/9185—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling in the direction of the stream of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Peptides Or Proteins (AREA)
- Saccharide Compounds (AREA)
Abstract
The present invention relates to a kind of differential methods to crystallize enhancing PP material cortex intensity methods, and the method specifically includes following steps：Install intensifier additional between shaping platform and mold, high-temperature fusant enters intensifier from die orifice, enhancing is since the 1st grade, logical cold water makes the section be less than PP material crystalline temperature with melt contacts face temperature, make PP material melt surface crystallization skinning, calculate design the resistance that every 1 grade of enhancing area generates be necessarily less than PP materials under the melt intensity and extrusion pressure to the sum of melt thrust, it has been entirely capable of entering shaping platform after meeting the requirements to the intensity of 10 grades of the enhanced cortex of accumulation again from 1 grade of enhancing, the present invention enhances PP material cortex intensity methods and continuously squeezes out melt, the multistage differential face that carries out of setting is crystallized, the leakage of crystallization process bubble-free generates, PP plate faces after crystallization are smooth, cooling does not uniformly generate temperature stress, do not generate warped portion, timber intensity is high after crystallization, controlling of production process is good.
Description
Technical field
The present invention relates to the new field shaping techniques of high molecular material, and in particular to a kind of differential method crystallization enhancing PP material skins
Layer intensity method.
Background technology
Polymer material molding mode depends on the characteristic of material.PP since the low , Jie Convicting temperature ranges of melt Strong degree are small, because
And three rollers can only be used to shape in continuous extrusion PP planks, and cannot be shaped with shaping platform.
And it is PP material melts intensity and primary crystallization skinning under current state of arts that cannot use shaping platform production technology
Intensity fails to reach requirement.It is to reduce shaping platform technological requirement that one must be thus studied in terms of two, second is that enhancing PP materials are molten
Body intensity.Numerous studies are carried out both at home and abroad.Presently mainly from by chemical modification to material melt intensity enhancing, but cost
Substantially increase, also fails to that requirement is fully achieved.
And this technology is based on for the weak only relatively current processing technology of PP material melt intensity, after PP material crystallines
Intensity high energy meet technological requirement this point carry out reversal technique exploitation, solve PP materials from melt to crystallize this during energy
Enough meet the brand new technical of forming requirements technical conditions.Will from melt to crystallization needed for condition carry out differential, the item finally accumulated
Part can meet the requirement of common shaping platform technique.This is this technology developmental achievement.
Invention content
To solve the above problems, the present invention is intended to provide it is a kind of it is can continuously squeezing out, plate face is smooth, plank cooling is equal
Enhancing PP material cortex intensity methods that are even, being not easy warpage and generation bubble leakage.
Purpose to realize the present invention, the technical solution adopted is that：A kind of differential method crystallization enhancing PP material cortexes intensity side
Method, the front end connecting mold for enhancing intensifier used in PP material cortex intensity methods, rear end connects shaping platform, institute
The contact position for stating intensifier and mold is set as die orifice, and the intensifier is internally provided with 10 grades or 10 grades or more of cold water
It manages, is provided with heat insulation slot between the cold water pipe, runner of the melt inside intensifier is flowed, and the runner exists
The wall surface of intensifier interior section is set as pipes' analysis, and the enhancing PP material cortex intensity methods specifically include following step
Suddenly：
1) skinning：Install intensifier additional between shaping platform and mold, high-temperature fusant enters intensifier from die orifice, increases
By force since the 1st grade, it is low that the differential face temperature that cold water makes the runner of this section be formed under heat insulation slot effect is led to inside cold water pipe
In 165 DEG C of PP material crystallines temperature, make PP material melt surface crystallization skinning；
2) is calculated：It calculates the total differential in differential crystallization skinning face all inside intensifier and crystallizes skinning area, design
And the resistance that each differential enhancing area for calculating every 1 grade of cold water pipe, heat insulation slot and runner generates so that the resistance is from increase
1 grade again to 10 grades or 10 grades or more of the sum of the resistance of accumulation be necessarily less than PP materials under the melt intensity and extrusion pressure to molten
The sum of thrust body；
Differential crystallization skinning mask body by two adjacent heat insulation slots and between cold water pipe have what pipes' analysis was formed
The area less than PP crystallization temperatures of limit forms；
3) increases grade：Cold water pipe, heat insulation slot and runner inside intensifier is enhanced successively from the 1st grade to 10 grades or 10
Grade or more, from increasing by 1 grade satisfaction has been entirely capable of to the intensity of 10 grades or 10 grades or more of the enhanced cortex of accumulation commonly again
Shaping platform requirement.
Preferably, the cold water temperature in the enhancing PP material cortex intensity method steps 1 in cold water pipe be set as 10~
80℃。
Preferably, the initial temperature of intensifier is set as 180 DEG C in the enhancing PP material cortex intensity method steps 1
~300 DEG C.
Preferably, 3~15mm of distance between described two adjacent heat insulation slots, wherein the width of heat insulation slot is 2~15mm,
Length is set as 10~3000mm.
Preferably, every 1 grade of cold water pipe inside the intensifier is set as mutual indepedent and can control the cold of flow
Water pipe.
Preferably, every 1 grade of cold water pipe is identical to the distance between runner, wherein the outer surface of runner and thermal insulation
The distance between slot is set as 3~15mm.
Preferably, it is described enhancing PP material cortex intensity methods used in intensifier booting when with production when enhancing
Mode is different；
The enhancement method when booting is to crystallize skinning by the differential crystallization skinning face on the 10th grade of pipes' analysis, is followed
Ring enhances to the 1st grade, completes start process, anhydrous in cold water pipe when booting, and the 1st grade is reached by the 10th grade of successive；
The enhancement method when production is to crystallize skinning by the differential crystallization skinning face on the 1st grade of pipes' analysis, is followed
Ring enhancing has water when production to the 10th grade in cold water pipe.
Beneficial effects of the present invention are：The present invention enhances PP material cortex intensity methods and continuously squeezes out melt, and setting is more
Grade carries out differential face and carries out crystallization skinning so that crystallization process gas-tight generates, and the PP plate faces after crystallization are smooth, cooling equal
It is even, warped portion is not generated, timber intensity height, crystallization temperature are easy to control after crystallization, reduce cost, meet production requirement.
Description of the drawings
Fig. 1 is the intensifier structural schematic diagram of differential method crystallization enhancing PP material cortex intensity methods of the present invention.
Fig. 2 is the differential crystallization skinning structural schematic diagram of differential method crystallization enhancing PP material cortex intensity methods of the present invention.
In figure：11, intensifier；12, mold；13, shaping platform；14, cold water pipe；15, heat insulation slot；16, runner；17, mould
Mouthful；18, pipes' analysis.
Specific implementation mode
Below in conjunction with the embodiment of the present invention, technical scheme of the present invention is clearly and completely described, it is clear that
Described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the implementation in the present invention
Example, every other embodiment obtained by those of ordinary skill in the art without making creative efforts belong to
The scope of protection of the invention.
Embodiment 1
It please refers to shown in Fig. 1, the technical solution adopted by the present invention is：A kind of differential method crystallization enhancing PP material cortex intensity
Method, the front end connecting mold 12 for enhancing intensifier 11 used in PP material cortex intensity methods, rear end connection are fixed
Type platform 13, the intensifier 11 and the contact position of mold 12 are set as die orifice 17, and the intensifier 11 is internally provided with 10
Grade or 10 grades or more of cold water pipe 14 are provided with heat insulation slot 15 between the cold water pipe 14, and the melt is in intensifier 11
The runner 16 in portion is flowed, and the runner 16 is set as pipes' analysis 18, the increasing in the wall surface of 11 interior section of intensifier
Strong PP material cortex intensity methods specifically include following steps：
1) skinning：Install intensifier 11 additional between shaping platform 13 and mold 12, high-temperature fusant enters from die orifice 17 to be enhanced
Device 11 enhances since the 1st grade, and cold water is led to inside cold water pipe 14 makes the runner 16 of this section be formed under the effect of heat insulation slot 15
Differential face temperature be less than 165 DEG C of PP material crystallines temperature, make PP material melt surface crystallization skinning；
2) is calculated：It calculates the total differential in all differential crystallization skinning faces in 11 inside of intensifier and crystallizes skinning area, if
Count and calculate the resistance that each differential enhancing area of every 1 grade of cold water pipe 14, heat insulation slot 15 and runner 16 generates so that the resistance
Power is necessarily less than PP materials intensity and extrusion under the melt for 1 grade to 10 grades or 10 grades or more of the sum of the resistance of accumulation again from increase
Pressure is to the sum of melt thrust；
Differential crystallization skinning mask body by two adjacent heat insulation slots 15 and between cold water pipe 14 in 18 shape of pipes' analysis
At the limited area less than PP crystallization temperatures form；
3) increases grade：Cold water pipe 14, heat insulation slot 15 and runner 16 inside intensifier 11 is enhanced from the 1st grade successively to
It 10 grades or 10 grades or more, has been entirely capable of again to the intensity of 10 grades or 10 grades or more of the enhanced cortex of accumulation from increasing by 1 grade
Meet the requirement of common shaping platform 13.
Further, the cold water temperature in the enhancing PP material cortex intensity method steps 1 in cold water pipe 14 is set as
10~80 DEG C.
Further, the initial temperature of intensifier 11 is set as in the enhancing PP material cortex intensity method steps 1
180 DEG C~300 DEG C.
Further, 3~15mm of distance between described two adjacent heat insulation slots 15, wherein the width of heat insulation slot 15 be 2~
15mm, length are set as 10~3000mm.
Further, the intensifier 11 is warming up to 200~300 DEG C by heating apparatus die heater.
Further, every 1 grade of cold water pipe 14 inside the intensifier 11 is set as mutual indepedent and can control stream
The cold water pipe of amount.
Further, every 1 grade of cold water pipe 14 is identical to the distance between runner 16, wherein the appearance of runner 16
The distance between face and heat insulation slot 15 are set as 3~15mm.
When further, intensifier 11 used in the enhancing PP material cortex intensity methods is switched on and when production
Enhancement method is different；
The enhancement method when booting is to crystallize skinning by the differential crystallization skinning face on the 10th grade of pipes' analysis 18,
Cycle enhancing completes start process to the 1st grade, anhydrous in cold water pipe 14 when booting, and the 1st grade is reached by the 10th grade of successive；
The enhancement method when production is to crystallize skinning by the differential crystallization skinning face on the 1st grade of pipes' analysis 18,
Cycle enhancing has water when production to the 10th grade in cold water pipe 14.
Embodiment 2
The present embodiment difference from example 1 is that：
Cold water temperature in the enhancing PP material cortex intensity method steps 1 in cold water pipe 14 is set as 10 DEG C；
The initial temperature of intensifier 11 is set as 180 DEG C in the enhancing PP material cortex intensity method steps 1.
Embodiment 3
The present embodiment difference from example 1 is that：
Cold water temperature in the enhancing PP material cortex intensity method steps 1 in cold water pipe 14 is set as 30 DEG C；
The initial temperature of intensifier is set as 190 DEG C in the enhancing PP material cortex intensity method steps 1.
Embodiment 4
The present embodiment difference from example 1 is that：
Cold water temperature in the enhancing PP material cortex intensity method steps 1 in cold water pipe 14 is set as 40 DEG C；
The initial temperature of intensifier 11 is set as 185 DEG C in the enhancing PP material cortex intensity method steps 1.
In the present invention, the present invention enhances PP material cortex intensity methods and continuously squeezes out melt, and it is micro- that multistage progress is arranged
Facet carries out crystallization skinning so that crystallization process is generated without leakage bubble, and the PP plate faces after crystallization are smooth, and cooling does not generate uniformly
Temperature stress does not generate warped portion, and timber intensity height, crystallization range are big after crystallization, reduce cost, meet production
It is required that.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding without departing from the principles and spirit of the present invention can carry out these embodiments a variety of variations, modification, replace
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of differential method crystallization enhancing PP material cortex intensity methods, it is characterised in that：The enhancing PP material cortex intensity
The front end connecting mold (12) of intensifier used in method (11), rear end connect shaping platform (13), the intensifier
(11) it is set as die orifice (17) with the contact position of mold (12), the intensifier (11) is internally provided with 10 grades or 10 grades or more
Cold water pipe (14), be provided with heat insulation slot (15) between the cold water pipe (14), the melt is internal in intensifier (11)
Runner (16) is flowed, and the runner (16) is set as pipes' analysis (18), institute in the wall surface of intensifier (11) interior section
It states enhancing PP material cortex intensity methods and specifically includes following steps：
1) skinning：Install intensifier (11) additional between shaping platform (13) and mold (12), high-temperature fusant enters from die orifice (17)
Intensifier (11) enhances since the 1st grade, and logical cold water makes the runner (16) of this section in heat insulation slot inside cold water pipe (14)
(15) the lower differential face temperature formed of effect is less than 165 DEG C of PP material crystallines temperature, makes PP material melt surface crystallization skinning；
2) is calculated：It calculates the total differential in the internal all differential crystallization skinning faces of intensifier (11) and crystallizes skinning area, design
And the resistance that each differential enhancing area for calculating every 1 grade of cold water pipe (14), heat insulation slot (15) and runner (16) generates so that
The resistance from increase by 1 grade again to 10 grades or 10 grades or more of the sum of the resistance of accumulation be necessarily less than PP materials under the melt intensity with
Extrusion pressure is to the sum of melt thrust；
Differential crystallization skinning mask body by two adjacent heat insulation slots (15) and between cold water pipe (14) in pipes' analysis (18)
The limited area less than PP crystallization temperatures formed forms；
3) increases grade：Intensifier (11) internal cold water pipe (14), heat insulation slot (15) and runner (16) are increased successively from the 1st grade
It is complete from 1 grade of intensity for accumulating enhanced cortex again to 10 grades or 10 grades or more is increased by force to 10 grades or 10 grades or more
The requirement of common shaping platform (13) all can be met.
2. a kind of differential method crystallization enhancing PP material cortex intensity methods according to claim 1, it is characterised in that：It is described
Cold water temperature in enhancing PP material cortex intensity method steps 1 in cold water pipe (14) is set as 10~80 DEG C.
3. a kind of differential method crystallization enhancing PP material cortex intensity methods according to claim 1, it is characterised in that：It is described
The initial temperature of intensifier (11) is set as 180 DEG C~300 DEG C in enhancing PP material cortex intensity method steps 1.
4. a kind of differential method crystallization enhancing PP material cortex intensity methods according to claim 1, it is characterised in that：It is described
3~15mm of distance between two adjacent heat insulation slots (15), wherein the width of heat insulation slot (15) is 2~15mm, and length is set as 10
~3000mm.
5. a kind of differential method crystallization enhancing PP material cortex intensity methods according to claim 1, it is characterised in that：It is described
Intensifier (11) is warming up to 200~300 DEG C by heating apparatus die heater.
6. a kind of differential method crystallization enhancing PP material cortex intensity methods according to claim 1, it is characterised in that：It is described
Internal every 1 grade of the cold water pipe (14) of intensifier (11) is set as cold water pipe that is mutual indepedent and can controlling flow.
7. a kind of differential method crystallization enhancing PP material cortex intensity methods according to claim 6, it is characterised in that：It is described
Every 1 grade of cold water pipe (14) is identical to the distance between runner (16), wherein between the surface and heat insulation slot (15) of runner (16)
Distance be set as 3~15mm.
8. a kind of differential method crystallization enhancing PP material cortex intensity methods according to claim 1, it is characterised in that：It is described
Enhance different from the enhancement method when production when intensifier (11) booting used in PP material cortex intensity methods；
The enhancement method when booting is to crystallize skinning by the differential crystallization skinning face on the 10th grade of pipes' analysis (18), is followed
Ring enhances to the 1st grade, completes start process, anhydrous in cold water pipe (14) when booting, and the 1st grade is reached by the 10th grade of successive；
The enhancement method when production is to crystallize skinning by the differential crystallization skinning face on the 1st grade of pipes' analysis (18), is followed
Ring enhancing has water when production to the 10th grade in cold water pipe (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810329633.5A CN108527817B (en) | 2018-04-13 | 2018-04-13 | Method for enhancing strength of PP material cortex through differential crystallization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810329633.5A CN108527817B (en) | 2018-04-13 | 2018-04-13 | Method for enhancing strength of PP material cortex through differential crystallization |
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| Publication Number | Publication Date |
|---|---|
| CN108527817A true CN108527817A (en) | 2018-09-14 |
| CN108527817B CN108527817B (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810329633.5A Active CN108527817B (en) | 2018-04-13 | 2018-04-13 | Method for enhancing strength of PP material cortex through differential crystallization |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483851A (en) * | 2018-12-28 | 2019-03-19 | 苏州聚复高分子材料有限公司 | A kind of technique controlling polymer crystallization degree in extrusion process |
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| CN204840999U (en) * | 2015-06-11 | 2015-12-09 | 江阴市江中设备制造有限公司 | Horizontal multi stage mold |
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2018
- 2018-04-13 CN CN201810329633.5A patent/CN108527817B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1317353A (en) * | 2001-02-28 | 2001-10-17 | 黄晸 | Differential crystallization method able to control gradient field and its equipment and application |
| US20080018011A1 (en) * | 2006-07-21 | 2008-01-24 | Gregg Joseph V | Production of UHMWPE sheet materials |
| CN101844215A (en) * | 2009-03-27 | 2010-09-29 | 宝山钢铁股份有限公司 | Dynamic secondary cooling control method for slab continuous casting based on double-cooling mode |
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| CN109483851A (en) * | 2018-12-28 | 2019-03-19 | 苏州聚复高分子材料有限公司 | A kind of technique controlling polymer crystallization degree in extrusion process |
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| CN108527817B (en) | 2021-01-15 |
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