CN113370433B - Method for producing cast nylon bar - Google Patents
Method for producing cast nylon bar Download PDFInfo
- Publication number
- CN113370433B CN113370433B CN202010157875.8A CN202010157875A CN113370433B CN 113370433 B CN113370433 B CN 113370433B CN 202010157875 A CN202010157875 A CN 202010157875A CN 113370433 B CN113370433 B CN 113370433B
- Authority
- CN
- China
- Prior art keywords
- material liquid
- cast nylon
- producing
- raw material
- group
- 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.)
- Active
Links
- 239000004677 Nylon Substances 0.000 title claims abstract description 67
- 229920001778 nylon Polymers 0.000 title claims abstract description 67
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 67
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 25
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 238000003756 stirring Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 12
- WQDUMFSSJAZKTM-UHFFFAOYSA-N Sodium methoxide Chemical compound [Na+].[O-]C WQDUMFSSJAZKTM-UHFFFAOYSA-N 0.000 claims description 10
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 9
- 230000003213 activating effect Effects 0.000 claims description 9
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 8
- DVKJHBMWWAPEIU-UHFFFAOYSA-N toluene 2,4-diisocyanate Chemical compound CC1=CC=C(N=C=O)C=C1N=C=O DVKJHBMWWAPEIU-UHFFFAOYSA-N 0.000 claims description 8
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 7
- 230000018044 dehydration Effects 0.000 claims description 6
- 238000006297 dehydration reaction Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- QISSLHPKTCLLDL-UHFFFAOYSA-N N-Acetylcaprolactam Chemical compound CC(=O)N1CCCCCC1=O QISSLHPKTCLLDL-UHFFFAOYSA-N 0.000 claims description 5
- 229920001228 polyisocyanate Polymers 0.000 claims description 5
- 239000005056 polyisocyanate Substances 0.000 claims description 5
- -1 polymethylene Polymers 0.000 claims description 5
- 229920006389 polyphenyl polymer Polymers 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 229910052708 sodium Inorganic materials 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000005266 casting Methods 0.000 description 6
- 239000012190 activator Substances 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 3
- 239000003426 co-catalyst Substances 0.000 description 3
- 229920006351 engineering plastic Polymers 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
-
- 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
- B29C39/22—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyamides (AREA)
Abstract
The invention discloses a method for producing a cast nylon bar, which comprises the following steps: pouring: injecting material liquid for producing the cast nylon bar into a bar mold preheated to 150-180 ℃; pressurizing: applying a pressure of 7-20MPa to the material liquid, wherein the total pressure maintaining time is 6-120min; and (3) forming and demolding: naturally cooling to room temperature, and opening the die to obtain the cast nylon bar. The invention has the beneficial effects that: the length of the produced cast nylon bar can reach 1 meter, and air holes can be prevented from being generated in the produced cast nylon bar, the top of the produced cast nylon bar is sunken, and other internal defects are avoided.
Description
Technical Field
The invention relates to the technical field of engineering plastics, in particular to a method for producing a cast nylon bar.
Background
The cast Nylon, monomer Casting Nylon, also called MC Nylon, MC Nylon product is one of engineering plastics, has various properties of light weight, high strength, self-lubricating property, wear resistance, corrosion resistance, insulation and the like, and is widely applied engineering plastics. The nylon rod material made of cast nylon can replace the wear-resistant part of mechanical equipment and replace copper and alloy to be used as the wear-resistant part of the equipment. The high-strength wear-resistant steel has the characteristics of good toughness, strong wear resistance, oil resistance, shock resistance, good tensile and bending strength, small water absorption, good dimensional stability and the like, so that the high-strength wear-resistant steel is used for processing various wear-resistant high-strength parts.
The current common production process for casting nylon bars is casting molding demoulding, wherein the molten raw material caprolactam monomer (C) is produced under normal pressure 6 H 11 NO) using alkaline substance as activator, making monomer to be polymerized together with cocatalyst, directly injecting into a mould preheated to a certain temperature, making the material undergo the process of quick polymerization reaction in the mould, coagulating into tough solid blank, then making treatment by using related process so as to obtain the invented nylon bar material product.
However, the conventional production process can only produce bars with short length, when the length of the bar is large (such as about 1 m), pores or other internal defects are easily formed in the bar by the liquid nylon raw material in the polymerization process, so that the strength of the cast nylon bar is reduced, the top of the obtained cast nylon bar is seriously sunken due to the difference of the radial polymerization speeds of the polymerization monomers, the subsequent processing process needs to be cut off, and the utilization rate of the raw material is reduced. And the defects are more serious when the traditional production process is adopted to prepare the casting nylon Long Bangcai with the diameter of less than 80 mm.
Therefore, how to improve the method for producing the cast nylon rod so as to produce a long length (for example, up to 1000mm long) and avoid the generation of air holes inside, depressions at the top and other internal defects in the produced cast nylon rod is an important technical problem to be solved by those skilled in the art.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for producing a cast nylon bar, which comprises the following steps:
pouring: injecting material liquid for producing the casting nylon bar into a bar mold preheated to 150-180 ℃;
pressurizing: applying 7-20MPa pressure to the material liquid, wherein the total pressure maintaining time is 6-120min;
and (3) forming and demolding: naturally cooling to room temperature, and opening the mould to obtain the cast nylon bar.
Optionally, before the pressurizing step, the method further comprises:
stirring: and stirring the material liquid for 0.5-5min by using a stirring rod, wherein the stirring rod moves upwards from the bottom of the bar mold in the stirring process.
Optionally, before the pouring step, a step of preparing a material liquid is further included.
Optionally, the preparation liquor step further comprises:
melting: putting raw material caprolactam for producing the cast nylon bar into a vacuum reaction kettle, heating to 135-140 ℃, and removing water in the vacuum reaction kettle in vacuum for 10-30min to obtain raw material liquid;
material distribution: and (3) dehydrating the raw material liquid according to the mass ratio of 1: the I is divided into A group raw material liquid and B group raw material liquid;
grouping and batching: adding an activating agent into the group A raw material liquid, and uniformly mixing to obtain a group A raw material liquid; and simultaneously adding a cocatalyst into the group B raw material liquid and uniformly mixing to obtain a group B raw material liquid;
vacuum dehydration: simultaneously respectively placing the material liquid of group A and the material liquid of group B which are subjected to batching in a vacuum reaction kettle, heating to 135-140 ℃, and carrying out vacuum dehydration in the vacuum reaction kettle for 10-20min;
mixing materials: and uniformly mixing the dehydrated feed liquid of the group A and the dehydrated feed liquid of the group B to obtain the feed liquid for producing the cast nylon bar.
Optionally, in the pressurizing step, as the material shrinks, the material liquid is applied with a pressure of 7-17MPa at intervals of 1-120 s.
Optionally, in the step of pouring,
the preheating temperature of the bar die is as follows: 170-180 ℃.
Optionally, the activator is at least one of metallic sodium, sodium hydroxide, potassium hydroxide, and sodium methoxide.
Optionally, the mass of the activating agent accounts for 0.51-8% of the total mass of the raw material liquid.
Optionally, the cocatalyst is at least one of polymethylene polyphenyl polyisocyanate, diphenylmethane diisocyanate, toluene diisocyanate, and N-acetyl caprolactam.
Optionally, the mass of the cocatalyst accounts for 1.6-10% of the total mass of the raw material liquid.
Compared with the background art, the method for producing the cast nylon bar has the following beneficial effects: cast nylon rods having a long length (e.g., greater than 700mm, etc.) and/or a small diameter (e.g., less than 30mm, etc.) can be produced while avoiding the production of voids within, depressions in the top, and other internal defects in the produced cast nylon rods.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a process flow diagram of a method for producing a cast nylon rod according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The core of the invention is to provide a method for producing a cast nylon bar, which can produce a cast nylon bar with the length of more than 700mm and/or the diameter of less than 30mm, and simultaneously can avoid the production of air holes inside the produced cast nylon bar, the production of depressions at the top and other internal defects.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a process flow diagram of a method for producing a cast nylon rod according to an embodiment of the present invention.
In a specific embodiment, the present invention provides a method of producing a cast nylon rod comprising the steps of:
melting: and (3) putting caprolactam which is a raw material for producing the cast nylon bar into a vacuum reaction kettle, heating to 135-140 ℃, and removing water in the vacuum reaction kettle in vacuum for 10-30min to obtain a raw material solution. Preferably, water may be removed in the vacuum reaction kettle under vacuum for 12-20min.
Material distribution: and (3) dehydrating the raw material liquid according to the mass ratio of 1: the raw material liquid of group A and the raw material liquid of group B are divided into l.
Grouping and batching: adding an activating agent into the group A raw material liquid, and uniformly mixing to obtain a group A raw material liquid; and simultaneously adding the cocatalyst into the group B raw material liquid and uniformly mixing to obtain the group B raw material liquid.
Vacuum dehydration: and simultaneously respectively placing the material liquid of the group A and the material liquid of the group B which are subjected to burdening into a vacuum reaction kettle, heating to 135-140 ℃, and carrying out vacuum dehydration in the vacuum reaction kettle for 10-20min.
Mixing materials: and uniformly mixing the dehydrated feed liquid of the group A and the dehydrated feed liquid of the group B to obtain feed liquid for producing the cast nylon bar.
Pouring: injecting the material liquid for producing the casting nylon bar into a bar mold preheated to 150-180 ℃, wherein in the step, the preheating temperature of the bar mold is more preferably 170-180 ℃.
Stirring: and stirring the material liquid for 0.5-5min by using a stirring rod, wherein the stirring rod moves upwards from the bottom of the bar mold in the stirring process, preferably, the stirring rod is a metal stirring rod, and the material liquid is stirred by using the stirring rod for 0.5-2min.
Pressurizing: applying pressure of 7-20MPa to the feed liquid every 1-120s, and maintaining the total pressure for 6-120min. The total dwell time of 6-120min means that: the total time from the first application of pressure to the material liquid to the last application of pressure is 6-120min. More specifically, in the concrete implementation, the pressurization can be carried out through a hydraulic cylinder, a cylindrical metal pressure head matched with the size of the inner wall of the bar mold is installed at the end part of the cylinder rod of the hydraulic cylinder, and the purpose of adjusting the pressurization frequency is achieved by controlling the expansion and contraction frequency of the cylinder rod of the hydraulic cylinder. The feed liquid will gradually shrink and become less bulky throughout the pressurization step, thus eliminating the need to withdraw the metal head. Preferably, in the pressurizing step, a pressure of 7-17MPa can be applied to the material liquid, and the total dwell time is 10-60min.
And (3) forming and demolding: naturally cooling to room temperature, and opening the mould to obtain the cast nylon bar.
Mold cleaning: cleaning the bar die for the next use.
In a specific embodiment, the present invention provides a method for producing a cast nylon rod, wherein the activating agent is at least one of sodium metal (Na), sodium hydroxide (NaOH), potassium hydroxide (KOH), and sodium methoxide (CH 3 ONa); that is, the activator may be any one of sodium metal (Na), sodium hydroxide (NaOH), potassium hydroxide (KOH), and sodium methoxide (CH 3 ONa), or the activator may be any two or three of sodium metal (Na), sodium hydroxide (NaOH), potassium hydroxide (KOH), and sodium methoxide (CH 3 ONa). The mass of the activating agent accounts for 0.51-8 per mill of the total mass of the raw material liquid. Optionally, the mass of the activating agent accounts for 0.51-2% of the total mass of the raw material liquid.
In a specific embodiment, the co-catalyst is at least one of polymethylene polyphenyl polyisocyanate (PAPI), diphenylmethane diisocyanate (MDI), toluene Diisocyanate (TDI) and N-acetylcaprolactam (C8H 13NO 2), i.e. the co-catalyst is at least one of polymethylene polyphenyl polyisocyanate (PAPI), diphenylmethane diisocyanate (MDI), toluene Diisocyanate (TDI) and N-acetylcaprolactam (C8H 13NO 2), or the co-catalyst may be any two or more of polymethylene polyphenyl polyisocyanate (PAPI), diphenylmethane diisocyanate (MDI), toluene Diisocyanate (TDI) and N-acetylcaprolactam (C8H 13NO 2). The mass of the cocatalyst accounts for 1.6-10 per mill of the total mass of the raw material liquid. Optionally, the mass of the cocatalyst accounts for 1.6-5.5% of the total mass of the raw material liquid.
In particular embodiments, the method of producing a cast nylon rod provided by the present invention can produce a cast nylon rod having a long length (e.g., greater than 700mm, etc.) and/or a small diameter (e.g., less than 30mm, etc.) while avoiding the occurrence of voids within, depressions at the top, and other internal defects in the produced cast nylon rod, and the outer surface of the cast nylon rod produced by the method of producing a cast nylon rod provided by the present invention is also smoother than the cast nylon rods produced by the methods of the prior art.
In a particular embodiment, the method of producing cast nylon rods provided by the present invention may be used to produce cast nylon rods having a diameter of 5 to 500mm and a length of 30 to 2000 mm. Preferably, the method of producing a cast nylon rod may produce a cast nylon rod having a length of 1000mm and/or produce a cast nylon rod having a diameter of 30 mm.
Thus far, various embodiments of the present invention have been described in detail. Some details well known in the art have not been described in order to avoid obscuring the concepts of the present invention. It will be fully apparent to those skilled in the art from the foregoing description how to practice the presently disclosed embodiments.
The method for producing the cast nylon rod provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (9)
1. A method for producing a cast nylon rod, characterized by: it includes:
pouring: injecting material liquid for producing the cast nylon bar into a bar mold preheated to 150-180 ℃;
pressurizing: applying a pressure of 7-20MPa to the material liquid, wherein the total pressure maintaining time is 6-120min; in the pressurizing step, along with the shrinkage of the material, the pressure of 7-17MPa is applied to the material liquid at intervals of 1-120 s;
and (3) forming and demolding: naturally cooling to room temperature, and opening the mould to obtain the cast nylon bar.
2. The method of producing a cast nylon rod of claim 1, wherein: before the pressurizing step, the method further comprises:
stirring: stirring the material liquid for 0.5-5min by using a stirring rod.
3. The method of producing a cast nylon rod of claim 1, wherein: before the pouring step, the method also comprises a step of preparing the material liquid.
4. The method of producing a cast nylon rod of claim 3, wherein: the preparation feed liquid step further comprises:
melting: putting raw material caprolactam for producing the cast nylon bar into a vacuum reaction kettle, heating to 135-140 ℃, and removing water in the vacuum reaction kettle in vacuum for 10-30min to obtain raw material liquid;
material distribution: and (3) dehydrating the raw material liquid according to the mass ratio of 1: the I is divided into A group raw material liquid and B group raw material liquid;
grouping and batching: adding an activating agent into the group A raw material liquid, and uniformly mixing to obtain a group A raw material liquid; and simultaneously adding a cocatalyst into the group B raw material liquid and uniformly mixing to obtain a group B raw material liquid;
vacuum dehydration: simultaneously respectively placing the material liquid of group A and the material liquid of group B which are subjected to burdening into a vacuum reaction kettle, heating to 135-140 ℃, and carrying out vacuum dehydration in the vacuum reaction kettle for 10-20min;
mixing materials: and uniformly mixing the dehydrated feed liquid of the group A and the dehydrated feed liquid of the group B to obtain the feed liquid for producing the cast nylon bar.
5. The method of producing a cast nylon rod of claim 1, wherein: in the step of pouring,
the preheating temperature of the bar die is as follows: 170-180 ℃.
6. The method of producing a cast nylon rod of claim 4, wherein: the activating agent is at least one of metal sodium, sodium hydroxide, potassium hydroxide and sodium methoxide.
7. The method of producing a cast nylon rod of claim 4 or 6, wherein: the mass of the activating agent accounts for 0.51-8 per mill of the total mass of the raw material liquid.
8. The method of producing a cast nylon rod of claim 4, wherein:
the cocatalyst is at least one of polymethylene polyphenyl polyisocyanate, diphenylmethane diisocyanate, toluene diisocyanate and N-acetyl caprolactam.
9. The method of producing a cast nylon rod of claim 4 or 8, wherein: the mass of the cocatalyst accounts for 1.6-10 per mill of the total mass of the raw material liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157875.8A CN113370433B (en) | 2020-03-09 | 2020-03-09 | Method for producing cast nylon bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010157875.8A CN113370433B (en) | 2020-03-09 | 2020-03-09 | Method for producing cast nylon bar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113370433A CN113370433A (en) | 2021-09-10 |
| CN113370433B true CN113370433B (en) | 2023-04-18 |
Family
ID=77568482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010157875.8A Active CN113370433B (en) | 2020-03-09 | 2020-03-09 | Method for producing cast nylon bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113370433B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916079A (en) * | 2006-09-04 | 2007-02-21 | 余伟 | Pulp of aramid fiber enhanced molten nylon piece, and producing technique |
| CN101415748A (en) * | 2006-03-30 | 2009-04-22 | 东丽株式会社 | Dendritic polyester, method for producing the same, and thermoplastic resin composition |
| CN101439567A (en) * | 2008-12-25 | 2009-05-27 | 麦克奥迪（厦门）电气有限公司 | Vacuum pressure pouring process for epoxy resins insulation pouring piece of high voltage electric appliance |
| CN102153743A (en) * | 2011-01-18 | 2011-08-17 | 武汉工程大学 | Preparation method of self-lubricating and high-strength pouring nylon |
| CN104960124A (en) * | 2015-06-17 | 2015-10-07 | 河北辛集腾跃实业有限公司 | Die-cast forming technology for nylon blank of core disc wear disc |
| CN106243346A (en) * | 2016-08-19 | 2016-12-21 | 邢台中车环保科技有限公司 | Fiber reinforcement MC nylon composite materials and forming method thereof |
| CN106366645A (en) * | 2016-08-31 | 2017-02-01 | 西安尼龙制品厂 | Red casting nylon material and preparing method thereof |
| CN107452439A (en) * | 2017-07-12 | 2017-12-08 | 西安理工大学 | A kind of compound insulation sleeve high voltage bus and its manufacture method |
| CN107571527A (en) * | 2017-08-29 | 2018-01-12 | 老河口市万顺汽车配件有限公司 | A kind of production technology of automobile rare earth oil-containing modified MC nylon casting bushing and its application |
| CN208730139U (en) * | 2018-08-28 | 2019-04-12 | 深圳市鸿冠钇科技有限公司 | A kind of semiconductor high temperature resistant precision die |
-
2020
- 2020-03-09 CN CN202010157875.8A patent/CN113370433B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101415748A (en) * | 2006-03-30 | 2009-04-22 | 东丽株式会社 | Dendritic polyester, method for producing the same, and thermoplastic resin composition |
| CN1916079A (en) * | 2006-09-04 | 2007-02-21 | 余伟 | Pulp of aramid fiber enhanced molten nylon piece, and producing technique |
| CN101439567A (en) * | 2008-12-25 | 2009-05-27 | 麦克奥迪（厦门）电气有限公司 | Vacuum pressure pouring process for epoxy resins insulation pouring piece of high voltage electric appliance |
| CN102153743A (en) * | 2011-01-18 | 2011-08-17 | 武汉工程大学 | Preparation method of self-lubricating and high-strength pouring nylon |
| CN104960124A (en) * | 2015-06-17 | 2015-10-07 | 河北辛集腾跃实业有限公司 | Die-cast forming technology for nylon blank of core disc wear disc |
| CN106243346A (en) * | 2016-08-19 | 2016-12-21 | 邢台中车环保科技有限公司 | Fiber reinforcement MC nylon composite materials and forming method thereof |
| CN106366645A (en) * | 2016-08-31 | 2017-02-01 | 西安尼龙制品厂 | Red casting nylon material and preparing method thereof |
| CN107452439A (en) * | 2017-07-12 | 2017-12-08 | 西安理工大学 | A kind of compound insulation sleeve high voltage bus and its manufacture method |
| CN107571527A (en) * | 2017-08-29 | 2018-01-12 | 老河口市万顺汽车配件有限公司 | A kind of production technology of automobile rare earth oil-containing modified MC nylon casting bushing and its application |
| CN208730139U (en) * | 2018-08-28 | 2019-04-12 | 深圳市鸿冠钇科技有限公司 | A kind of semiconductor high temperature resistant precision die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113370433A (en) | 2021-09-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106955985A (en) | A kind of secondary Compound Extrusion casting method of aluminium alloy semi-solid | |
| CN109732047B (en) | Progressive solidification forming method for large steel ingot or steel billet | |
| EP3539694B1 (en) | Aluminum wheel squeeze casting process and device | |
| CN104625006B (en) | The pressure casting method of auto parts machinery | |
| CN111676404A (en) | Improved die casting forming method | |
| CN113370433B (en) | Method for producing cast nylon bar | |
| CN104723031B (en) | Radial-forging type strain induction semi-solid state extrusion technology for waveguide tube | |
| CN104292767B (en) | Vacuum casting mold material used for electrical insulation parts, and preparation method of mold | |
| CN207770626U (en) | A kind of water heater bottom plate mold | |
| CN105268940A (en) | Semi-solid rheological forming process for automobile parts | |
| CN117921967A (en) | Method for setting mold parameters | |
| US3166533A (en) | Method for the adiabatic production of castings of polycaprolactam and similar polyamides having any required shape and size | |
| CN102382458A (en) | High-intensity, wear-resistant and self-lubricating oil-bearing modified cast nylon pulley and production method thereof | |
| CN85109612A (en) | Melten-casting method with deformable electroslah for crankshaft at one go | |
| CN101800124A (en) | Preparation method of polyfluortetraethylene medium-pressure casing pipe for current transformer | |
| CN102861903A (en) | Connecting rod liquid-state die forging process | |
| CN212019316U (en) | Large-diameter arc-shaped lining tile composite casting mold | |
| CN108311654B (en) | Production method for preparing thick-wall metal die by centrifugal method | |
| CN105219981A (en) | A kind of controlled volume mark Ti 2alC pthe preparation method of/Al based composites | |
| CN113021959B (en) | Manufacturing method of thin-wall cast nylon plate | |
| CN105419246A (en) | Preparation method of high-wear-resistance plastic mold material for ceramic forming | |
| CN101069923A (en) | Process for producing hard-cold cast iron hydraulic machine piston | |
| CN103567252B (en) | The manufacture craft of heavy wall copper pipe | |
| CN109530654B (en) | Low-pressure casting die of aluminum alloy outer rotor casting and mounting method thereof | |
| CN111390134B (en) | High-performance die casting forming method based on two-plate die casting machine and product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 055150 Middle Section of Guanghua Road, Renze Economic Development Zone, Xingtai City, Hebei Province Patentee after: Hebei Hongrui Environmental Protection Technology Co.,Ltd. Address before: 055150 middle section of Guanghua Road, Renxian Economic Development Zone, Xingtai City, Hebei Province Patentee before: XINGTAI CRRC ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. |
|
| CP03 | Change of name, title or address |