CN106313390B - Leaf springs of car baffle casting process - Google Patents
Leaf springs of car baffle casting process Download PDFInfo
- Publication number
- CN106313390B CN106313390B CN201610774341.3A CN201610774341A CN106313390B CN 106313390 B CN106313390 B CN 106313390B CN 201610774341 A CN201610774341 A CN 201610774341A CN 106313390 B CN106313390 B CN 106313390B
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- China
- Prior art keywords
- minutes
- added
- constant temperature
- caprolactam
- temperature
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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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/003—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor characterised by the choice of material
- B29C39/006—Monomers or prepolymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
- C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
- C08G69/14—Lactams
- C08G69/16—Preparatory processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- 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
- B29K2023/16—EPM, i.e. ethylene-propylene copolymers; EPDM, i.e. ethylene-propylene-diene copolymers; EPT, i.e. ethylene-propylene terpolymers
Abstract
The invention discloses leaf springs of car baffle casting process, including caprolactam melting liquid is gone in dehydration furnace, the sodium hydroxide of ethylene-propylene copolymer A-C540A, 0.15-0.3% of the 2-5% of its weight is added, constant temperature sets 140 ± 10 DEG C, time controls 10 ± 2 minutes and is carried out dehydrating, then the HDI monomer 1 of the 0.4-0.8% of caprolactam melting liquid weight is added, 6- hexyl diisocyanate is shaken up；Gained liquid is poured into mold again and is polymerize, constant temperature sets 180-190 DEG C, keeps the temperature 4 minutes, and cooling product is placed after depanning.The present invention improves auxiliary material addition, and a certain amount of toughener is added, and curing agent substitutes toluene by HDI monomer, produces leaf spring baffle with more superior performance.
Description
Technical field
The present invention relates to automotive parts manufacturing technologies, and in particular to leaf springs of car baffle casting process.
Background technique
Leaf spring baffle is a kind of product in automobile parts, is formed at present using caprolactam melting liquid cast polymerization, to production
The performance that product itself have has certain standard requirements.The control of cast polymerization process and the addition of auxiliary material are to product lastness
There can be considerable influence.In existing production, generally first caprolactam crystal is melted, in order to prevent wherein moisture content at
Product generate stomata, after thawing be added sodium hydroxide be carried out dehydrating, then be added toluene after, cast polymerization, toughness of products with
Strength character fails up to ideal indicator.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of leaf springs of car baffle casting process, improve auxiliary material addition, add
Enter a certain amount of toughener, change curing agent type, produces leaf spring baffle with more superior performance.
The invention is realized by the following technical scheme：
Leaf springs of car baffle casting process, includes the following steps：
（1）Caprolactam crystal is taken to melt under 150 ± 10 DEG C of constant temperature；
（2）Caprolactam melting liquid is gone in dehydration furnace, the ethylene-propylene copolymer A- of the 2-5% of its weight is added
The sodium hydroxide of C540A, 0.15-0.3%, constant temperature set 140 ± 10 DEG C, and the time controls 10 ± 2 minutes and is carried out dehydrating, so
The HDI monomer 1,6- hexyl diisocyanate that the 0.4-0.8% of caprolactam melting liquid weight is added afterwards is shaken up；
（3）By step（2）Gained liquid, which pours into mold, to be polymerize, and constant temperature sets 180-190 DEG C, 4 minutes is kept the temperature, after depanning
Place cooling product.
It is step that the present invention, which is further improved scheme,（1）Caprolactam crystal carries out secondary multiple title after melting.Second weighing
Reduce error.
The further improvement project of the present invention is step（2）Middle dehydration furnace is first preheated, and 140 ± 10 DEG C of preheating temperature,
Constant temperature time 2 minutes.Dehydration furnace is preheated, guarantees that dehydration furnace reaches set temperature, constant temperature dehydration is realized, advantageously ensures that product most
Whole performance.
The further improvement project of the present invention is step（3）Middle mold is first placed horizontally at preheating, preheating temperature in baking oven
180-190 DEG C, keep the temperature 4 ± 1 minutes.Preheated mold guarantees that polymerization temperature is constant, is conducive to improve product final performance.
Compared with prior art, the present invention having following obvious advantage：
Ethylene-propylene copolymer A-C540A toughener is added in the present invention in process of production, and it is strong to improve toughness of products
Degree, additional amount are the 2-5% of caprolactam melting liquid weight, and toughness is inadequate if lower than 2%, if being higher than 5% otherwise hardness becomes
It is low, it is undesirable；It changes simultaneously original process and toluene solidification is added, add Bayer Bitterfeld GmbH HDI monomer 1, two isocyanide of 6- hexyl
Acid esters, promotes leaf spring baffle product final performance, and Bayer Bitterfeld GmbH HDI monomer additional amount is the 0.4- of caprolactam melting liquid weight
0.8%, the intensity difference if lower than 0.4% is not up to standard, is such as higher than 0.8%, effect is not remarkably reinforced for strength character, therefore auxiliary material is mixed
It is critically important in right amount to enter ratio.
Specific embodiment
Embodiment 1
（1）Caprolactam melting furnace set temperature is 150 ± 10 DEG C, and indicator light is in temperature constant state, takes caprolactam brilliant
Wherein constant temperature melts body investment, claims again after thawing, secondary weighing；
（2）Dehydration electromagnetic oven is first preheated, and 140 ± 10 DEG C of preheating temperature, constant temperature time 2 minutes, caprolactam is melted
Change liquid to go in dehydration electromagnetic oven, the ethylene-propylene copolymer A-C540A of the 2% of its weight, 0.15% sodium hydroxide be added,
Constant temperature sets 140 ± 10 DEG C, and the time controls 10 ± 2 minutes and is carried out dehydrating, and caprolactam melting liquid weight is then added
0.4% Bayer Bitterfeld GmbH HDI monomer 1,6- hexyl diisocyanate is shaken up；
（3）Mold is first placed horizontally at preheating in baking oven, 180-190 DEG C of preheating temperature, keeps the temperature 4 ± 1 minutes；By step
（2）Gained liquid, which pours into mold, to be polymerize, and constant temperature sets 180-190 DEG C, keeps the temperature 4 minutes, and cooling is horizontally arranged after depanning, must be made
Product.
Embodiment 2
Ethylene-propylene copolymer A-C540A additional amount is the 3% of caprolactam melting liquid weight, and addition amount of sodium hydroxide is
The 0.25% of caprolactam melting liquid weight, Bayer Bitterfeld GmbH HDI monomer 1,6- hexyl diisocyanate additional amount are caprolactam
The 0.6% of melting liquid weight, remaining is such as embodiment 1.
Embodiment 3
Ethylene-propylene copolymer A-C540A additional amount is the 5% of caprolactam melting liquid weight, and addition amount of sodium hydroxide is
The 0.3% of caprolactam melting liquid weight, Bayer Bitterfeld GmbH HDI monomer 1,6- hexyl diisocyanate additional amount are melted for caprolactam
Change the 0.8% of liquid weight, remaining is such as embodiment 1.The present embodiment product send mechanical industry auto parts and components product quality supervision to detect
As a result other documentary evidences are shown in Spot detection identification.
Comparative example
It is not added with ethylene-propylene copolymer A-C540A, the auxiliary material for playing solidification is toluene, replaces Bayer Bitterfeld GmbH HDI mono-
Body, remaining is such as embodiment 1.Properties of product detection is carried out to embodiment 1,2,3 and comparison array 1, performance indicator is as shown in the table：
It is obviously superior to can be seen that the leaf spring baffle performance that production technology of the present invention is produced from upper table detection data.
Claims (2)
1. leaf springs of car baffle casting process, it is characterised in that comprise the steps of：
（1）Caprolactam crystal is taken to melt under 150 ± 10 DEG C of constant temperature；
（2）Dehydration furnace is first preheated, and 140 ± 10 DEG C of preheating temperature, constant temperature time 2 minutes, caprolactam melting liquid is gone to
In dehydration furnace, the sodium hydroxide of ethylene-propylene copolymer A-C540A, 0.15-0.3% of the 2-5% of its weight is added, constant temperature is set
140 ± 10 DEG C fixed, the time controls 10 ± 2 minutes and is carried out dehydrating, and the 0.4- of caprolactam melting liquid weight is then added
0.8% HDI monomer 1,6- hexyl diisocyanate is shaken up；
（3）Mold is first placed horizontally at preheating in baking oven, 180-190 DEG C of preheating temperature, keeps the temperature 4 ± 1 minutes, then by step（2）
Gained liquid, which pours into mold, to be polymerize, and constant temperature sets 180-190 DEG C, keeps the temperature 4 minutes, and cooling product is placed after depanning.
2. leaf springs of car baffle casting process according to claim 1, it is characterised in that：Step（1）Caprolactam crystal
Secondary multiple title is carried out after thawing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774341.3A CN106313390B (en) | 2016-08-31 | 2016-08-31 | Leaf springs of car baffle casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610774341.3A CN106313390B (en) | 2016-08-31 | 2016-08-31 | Leaf springs of car baffle casting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106313390A CN106313390A (en) | 2017-01-11 |
| CN106313390B true CN106313390B (en) | 2018-11-27 |
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ID=57789337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610774341.3A Active CN106313390B (en) | 2016-08-31 | 2016-08-31 | Leaf springs of car baffle casting process |
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| Country | Link |
|---|---|
| CN (1) | CN106313390B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112080139A (en) * | 2020-09-15 | 2020-12-15 | 江苏新华东尼龙有限公司 | Blank of automobile plate spring cushion block or pressing block and preparation method of finished product of blank |
| CN112029265A (en) * | 2020-09-15 | 2020-12-04 | 江苏新华东尼龙有限公司 | Blank of automobile plate spring baffle or bracket and preparation method of finished product of blank |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773953A (en) * | 2012-07-20 | 2012-11-14 | 江苏亚电新材料有限公司 | Preparation method for high-strength MC (monomer casting) nylon wheel |
| CN104829831A (en) * | 2015-02-11 | 2015-08-12 | 杭州师范大学 | Halogen-free flame-retarding nylon-6 preparation method |
| CN105153686A (en) * | 2015-09-18 | 2015-12-16 | 苏州新区佳合塑胶有限公司 | Impact-resistant composite material |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63218760A (en) * | 1987-03-05 | 1988-09-12 | Mitsubishi Monsanto Chem Co | Resin for amide resin molded article |
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2016
- 2016-08-31 CN CN201610774341.3A patent/CN106313390B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102773953A (en) * | 2012-07-20 | 2012-11-14 | 江苏亚电新材料有限公司 | Preparation method for high-strength MC (monomer casting) nylon wheel |
| CN104829831A (en) * | 2015-02-11 | 2015-08-12 | 杭州师范大学 | Halogen-free flame-retarding nylon-6 preparation method |
| CN105153686A (en) * | 2015-09-18 | 2015-12-16 | 苏州新区佳合塑胶有限公司 | Impact-resistant composite material |
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| Publication number | Publication date |
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| CN106313390A (en) | 2017-01-11 |
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