CN106313390A - Casting technology for automobile leaf spring baffle - Google Patents
Casting technology for automobile leaf spring baffle Download PDFInfo
- Publication number
- CN106313390A CN106313390A CN201610774341.3A CN201610774341A CN106313390A CN 106313390 A CN106313390 A CN 106313390A CN 201610774341 A CN201610774341 A CN 201610774341A CN 106313390 A CN106313390 A CN 106313390A
- Authority
- CN
- China
- Prior art keywords
- caprolactam
- constant temperature
- minutes
- baffle plate
- casting process
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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 a casting technology for an automobile leaf spring baffle. The technology comprises the steps that caprolactam molten liquid is converted into a water removing furnace, ethylene-propylene copolymer A-C540A accounting for 2%-5% of the weight of the caprolactam molten liquid and sodium hydroxide accounting for 0.15%-0.3% of the weight of the caprolactam molten liquid are added, the constant temperature is set to be 140+/-10 DEG C, time is controlled to be 10+/-2 min, and water removing is conducted; HDI monomer 1,6-hexyl diisocyanate accounting for 0.4%-0.8% of the weight of the caprolactam molten liquid is added to be shaken uniformly; and the obtained liquid is poured in a die to be polymerized, the constant temperature is set to range from 180 DEG C to 190 DEG C, heat preservation is conducted for 4 min, and a product is obtained through placing and cooling after die discharging. According to the casting technology, auxiliary material adding is improved, a certain number of toughening agents are added, the HDI monomer is used for replacing methylbenzene to serve as a curing agent, and the produced leaf spring baffle has more superior performance.
Description
Technical field
The present invention relates to Manufacturing Technology for Automotive Parts field, be specifically related to leaf springs of car baffle plate casting process.
Background technology
Leaf spring baffle plate is a series products in auto parts machinery, uses caprolactam melting liquid cast polymerization to form, to product at present
The performance that product self possess has certain standard-required.The control of cast polymerization process and the interpolation of adjuvant are to product lastness
Can there is considerable impact.In existing production, the most first by caprolactam crystal melt, in order to prevent wherein moisture content to one-tenth
Product produce pore, add sodium hydroxide and carry out processed, after being subsequently adding toluene, cast polymerization after thawing, toughness of products with
Strength character fails to reach 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 plate casting process, improves adjuvant and adds, adds
Enter a certain amount of toughener, change firming agent kind, produce leaf spring baffle plate and there is more superior performance.
The present invention is achieved through the following technical solutions:
Leaf springs of car baffle plate casting process, comprises the following steps:
(1) take caprolactam crystal to melt under 150 ± 10 DEG C of constant temperature；
(2) caprolactam melting liquid is gone in dehydration furnace, add the 2-5% of its weight ethylene-propylene copolymer A-C540A,
The sodium hydroxide of 0.15-0.3%, constant temperature sets 140 ± 10 DEG C, and time control carries out processed in 10 ± 2 minutes, is subsequently adding
The HDI monomer 1,6-hexyl diisocyanate of the 0.4-0.8% of caprolactam melting liquid weight shakes up；
(3) being poured into by step (2) gained liquid in mould and be polymerized, constant temperature sets 180-190 DEG C, is incubated 4 minutes, places after depanning
Cool down to obtain goods.
The further improvement project of the present invention is, step (1) caprolactam crystal carries out secondary after melting and claims again.Second weighing
Reduce error.
The present invention further improvement project is, in step (2), dehydration furnace first preheats, and preheats temperature 140 ± 10 DEG C,
Constant temperature time 2 minutes.Preheating dehydration furnace, it is ensured that dehydration furnace reaches design temperature, it is achieved constant temperature is dehydrated, advantageously ensures that product is
Whole performance.
The present invention further improvement project is, preheating in mould is first placed horizontally at baking oven in step (3), preheats temperature
180-190 DEG C, it is incubated 4 ± 1 minutes.Preheated mold, it is ensured that polymerization temperature is constant, is conducive to improving product final performance.
The present invention compared with prior art, has a following obvious advantage:
The present invention adds ethylene-propylene copolymer A-C540A toughener in process of production, improves toughness of products intensity, adds
Enter the 2-5% that amount is caprolactam melting liquid weight, as inadequate less than 2% toughness, otherwise as higher than 5% hardness step-down, not being inconsistent
Close requirement；Change former technique simultaneously and add toluene solidification, add Bayer Bitterfeld GmbH HDI monomer 1,6-hexyl diisocyanate, carry
Rising leaf spring baffle plate product final performance, Bayer Bitterfeld GmbH HDI monomer addition is the 0.4-0.8% of caprolactam melting liquid weight, as
Less than 0.4% intensity difference, the most up to standard, as higher than 0.8%, strength character is remarkably reinforced effect, therefore adjuvant mixed ratio
The most critically important.
Detailed description of the invention
Embodiment 1
(1) Caprolactam melting furnace design temperature is 150 ± 10 DEG C, and display lamp is in temperature constant state, takes caprolactam crystal and throws
Enter wherein constant temperature to melt, multiple title, secondary weighing after thawing；
(2) dehydration electromagnetic oven first preheats, and preheats temperature 140 ± 10 DEG C, and constant temperature time 2 minutes, by caprolactam melting liquid
Go to be dehydrated in electromagnetic oven, add its weight 2% ethylene-propylene copolymer A-C540A, the sodium hydroxide of 0.15%, constant temperature
Setting 140 ± 10 DEG C, time control carries out processed in 10 ± 2 minutes, is subsequently adding the 0.4% of caprolactam melting liquid weight
Bayer Bitterfeld GmbH HDI monomer 1,6-hexyl diisocyanate shake up；
(3) preheating in mould is first placed horizontally at baking oven, preheats temperature 180-190 DEG C, is incubated 4 ± 1 minutes；By step (2) institute
Obtaining liquid and pour polymerization in mould into, constant temperature sets 180-190 DEG C, is incubated 4 minutes, and after depanning, horizontal positioned cooling, obtains goods.
Embodiment 2
Ethylene-propylene copolymer A-C540A addition is the 3% of caprolactam melting liquid weight, in addition amount of sodium hydroxide is oneself
The 0.25% of amide melting liquid weight, Bayer Bitterfeld GmbH HDI monomer 1,6-hexyl diisocyanate addition is that caprolactam melts
The 0.6% of liquid weight, remaining is such as embodiment 1.
Embodiment 3
Ethylene-propylene copolymer A-C540A addition is the 5% of caprolactam melting liquid weight, in addition amount of sodium hydroxide is oneself
The 0.3% of amide melting liquid weight, Bayer Bitterfeld GmbH HDI monomer 1,6-hexyl diisocyanate addition is caprolactam melting liquid
The 0.8% of weight, remaining is such as embodiment 1.The present embodiment product send mechanical industry auto parts and components product quality supervisions inspection center
Detection is assert, result is shown in other documentary evidences.
Comparative example
Being not added with ethylene-propylene copolymer A-C540A, the adjuvant playing solidification is toluene, replaces Bayer Bitterfeld GmbH HDI monomer,
Remaining is such as embodiment 1.Embodiment 1,2,3 and comparison array 1 are carried out properties of product detection, and performance indications are as shown in the table:
From upper table detection data it can be seen that the leaf spring baffle plate performance made of production technology of the present invention is the most superior.
Claims (4)
1. leaf springs of car baffle plate casting process, it is characterised in that comprise the following steps:
(1) take caprolactam crystal to melt under 150 ± 10 DEG C of constant temperature；
(2) caprolactam melting liquid is gone in dehydration furnace, add the 2-5% of its weight ethylene-propylene copolymer A-C540A,
The sodium hydroxide of 0.15-0.3%, constant temperature sets 140 ± 10 DEG C, and time control carries out processed in 10 ± 2 minutes, is subsequently adding
The HDI monomer 1,6-hexyl diisocyanate of the 0.4-0.8% of caprolactam melting liquid weight shakes up；
(3) being poured into by step (2) gained liquid in mould and be polymerized, constant temperature sets 180-190 DEG C, is incubated 4 minutes, places after depanning
Cool down to obtain goods.
Leaf springs of car baffle plate casting process the most according to claim 1, it is characterised in that: step (1) caprolactam crystal
Carry out secondary after thawing to claim again.
Leaf springs of car baffle plate casting process the most according to claim 1, it is characterised in that: in step (2), dehydration furnace is advanced
Row preheating, preheats temperature 140 ± 10 DEG C, constant temperature time 2 minutes.
Leaf springs of car baffle plate casting process the most according to claim 1, it is characterised in that: mould elder generation level in step (3)
It is positioned over preheating in baking oven, preheats temperature 180-190 DEG C, be incubated 4 ± 1 minutes.
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 true CN106313390A (en) | 2017-01-11 |
| CN106313390B CN106313390B (en) | 2018-11-27 |
Family
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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106313390B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Citations (4)
| 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 |
| 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 |
-
2016
- 2016-08-31 CN CN201610774341.3A patent/CN106313390B/en active Active
Patent Citations (4)
| 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 |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| WO2022057128A1 (en) * | 2020-09-15 | 2022-03-24 | 马仁顺 | Preparation method for blank for automotive leaf spring baffle or support and finished product thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106313390B (en) | 2018-11-27 |
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