CN112776245A - Injection molding process for forming draw bar body of draw bar box - Google Patents
Injection molding process for forming draw bar body of draw bar box Download PDFInfo
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- CN112776245A CN112776245A CN202011623839.2A CN202011623839A CN112776245A CN 112776245 A CN112776245 A CN 112776245A CN 202011623839 A CN202011623839 A CN 202011623839A CN 112776245 A CN112776245 A CN 112776245A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 47
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims abstract description 39
- 239000000314 lubricant Substances 0.000 claims abstract description 27
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 24
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 23
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 18
- 239000000945 filler Substances 0.000 claims abstract description 17
- 239000002250 absorbent Substances 0.000 claims abstract description 14
- 230000002745 absorbent Effects 0.000 claims abstract description 14
- 238000000465 moulding Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 37
- 238000002156 mixing Methods 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 20
- 239000006097 ultraviolet radiation absorber Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 claims description 11
- 239000007924 injection Substances 0.000 claims description 11
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 11
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 11
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 10
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- PWWSSIYVTQUJQQ-UHFFFAOYSA-N distearyl thiodipropionate Chemical group CCCCCCCCCCCCCCCCCCOC(=O)CCSCCC(=O)OCCCCCCCCCCCCCCCCCC PWWSSIYVTQUJQQ-UHFFFAOYSA-N 0.000 claims description 7
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 230000007547 defect Effects 0.000 abstract description 7
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract description 5
- 239000004332 silver Substances 0.000 abstract description 5
- 229910052709 silver Inorganic materials 0.000 abstract description 5
- 239000012768 molten material Substances 0.000 abstract description 4
- 230000006750 UV protection Effects 0.000 abstract description 2
- 210000003462 vein Anatomy 0.000 abstract description 2
- 230000001050 lubricating effect Effects 0.000 description 7
- 229920000642 polymer Polymers 0.000 description 6
- 238000010521 absorption reaction Methods 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 3
- 239000012964 benzotriazole Substances 0.000 description 3
- 231100000053 low toxicity Toxicity 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 239000000243 solution 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/0001—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor characterised by the choice of material
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/77—Measuring, controlling or regulating of velocity or pressure of moulding 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
- B29C45/78—Measuring, controlling or regulating of temperature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L55/00—Compositions of homopolymers or copolymers, obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in groups C08L23/00 - C08L53/00
- C08L55/02—ABS [Acrylonitrile-Butadiene-Styrene] polymers
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76498—Pressure
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76531—Temperature
-
- 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
- B29C2945/00—Indexing scheme relating to injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould
- B29C2945/76—Measuring, controlling or regulating
- B29C2945/76494—Controlled parameter
- B29C2945/76595—Velocity
- B29C2945/76605—Velocity rotational movement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/06—Rods, e.g. connecting rods, rails, stakes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a draw-bar body molding and injection molding process of a draw-bar box, which comprises the following raw materials in parts by weight: 90-120 parts of ABS resin, 30-40 parts of filler, 10-16 parts of ultraviolet absorbent, 9-13 parts of antioxidant, 9-13 parts of lubricant and 12-16 parts of wear-resisting agent, compared with other treatment processes, the process is mature, the defects of silver veins, bubbles and the like on the surface of a pull rod product caused by overhigh water content are avoided through high-temperature drying treatment, certain ultraviolet absorbent, antioxidant, lubricant and wear-resisting agent are added into the raw materials, the ultraviolet resistance of the pull rod is improved, the brightness and the glossiness of the product are improved, the wear-resisting agent and the lubricant are matched mutually, good lubricity can be achieved, the wear resistance of the surface of the pull rod is improved, the wear is reduced, and the bonding of molten materials in a fixed die can be avoided by distinguishing the temperatures of the fixed die and a movable die, the cooling time is shortened, and the production.
Description
Technical Field
The invention relates to a production process of a draw-bar box accessory, in particular to a draw-bar box draw-bar body molding and injection molding process.
Background
The draw-bar box refers to a luggage case with a draw bar and rollers, and is widely used due to the convenient use, meanwhile, the draw-bar box is also provided with a draw bar due to the case, the draw bar is divided into a single-tube draw bar and a double-tube draw bar, the tube of the draw bar is divided into a square tube and a round tube, so that the luggage case is convenient to walk and greatly lightens the burden, the draw-bar box can be carried and dragged, the draw bar of the draw-bar box is one of important component parts of the draw-bar box, the draw-bar box is used for conveniently pulling the draw-bar box, and the luggage case is usually produced by adopting.
The existing draw-bar box draw-bar body molding injection molding process has the following defects that 1, when the traditional draw-bar box is subjected to injection molding production, raw materials generally only comprise ABS resin and filler, the raw materials are single, butadiene in the ABS contains double bonds, so that the thermal stability is poor, the weather resistance is poor, particularly ultraviolet rays are irradiated for a long time, the color of the materials is easily changed, the attractiveness of the draw-bar is influenced, the ABS is polar macromolecules, the moisture absorption tendency is caused, if the moisture content is too high, the defects of silver lines, bubbles and the like are easily caused on the surface of a product, the quality of the draw-bar is influenced, the draw-bar of the draw-bar box is continuously contacted and rubbed with the outside in the long-term use process, and the friction is also generated between the draw-bars in the stretching process of the draw-bar, so that the draw-bar is required to have certain wear resistance, and.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a draw-bar body molding and injection molding process for a draw-bar box, which has a mature process, wherein a drying device is adopted to carry out high-temperature drying treatment on ABS resin before production to ensure that the water content is reduced to below 0.2 percent, so that the defects of silver lines, bubbles and the like on the surface of a draw-bar product caused by overhigh water content are avoided, a certain amount of ultraviolet absorbent, antioxidant, lubricant and wear-resistant agent are added into raw materials, the material of the ultraviolet absorbent is UV327, is one of the main varieties of benzotriazole ultraviolet absorbents, has the characteristics of low toxicity, strong ultraviolet absorption capability and the like, can strongly absorb ultraviolet rays with the wavelength of 270-doped 380 nanometers, has stable chemical properties, extremely small volatility and good performance, can improve the ultraviolet prevention capability of the draw-bar, the material of the antioxidant is antioxidant DSTP, can delay the compatibility or inhibit the polymer oxidation process, thereby preventing the aging of the polymer, prolonging the service life of the polymer, improving the weather resistance and the service life of the pull rod, wherein the lubricant is made of PE wax, a lubricating thin layer can be formed on the surface of a plastic melt, improving the brightness and the glossiness of a product, the wear-resisting agent is made of polytetrafluoroethylene and has an extremely low friction coefficient, PTFE molecules ground out in the friction process can form a lubricating thin film on the surface of the pull rod, the thin film is matched with the lubricant to play a good role in lubricating, improving the wear resistance of the surface of the pull rod and reducing the wear, the adhesion of a molten material on a fixed die can be avoided through the temperature of the fixed die and the temperature of a movable die which are set differently, the high temperature of the fixed die enables ABS to have good fluidity in the pouring process, the molding is facilitated, the temperature of the movable die is low, the cooling time is facilitated to be shortened, the production efficiency is improved, the temperature of, the quality of the pull rod product is improved.
In order to achieve the purpose, the invention provides the following technical scheme: a draw-bar box draw-bar body molding injection molding process comprises the following raw materials in parts by weight: 90-120 parts of ABS resin, 30-40 parts of filler, 10-16 parts of ultraviolet absorbent, 9-13 parts of antioxidant, 9-13 parts of lubricant and 12-16 parts of wear-resistant agent, and comprises the following steps:
s1, drying the base material: 105 parts of ABS resin is selected and placed in a dryer for drying treatment, and the ABS resin is dried for 2 to 4 hours at a high temperature of between 80 and 90 ℃ to ensure that the water content in the ABS resin is lower than 0.2 percent;
s2, mixing materials: adding 105 parts of dried ABS resin and 35 parts of filler into a stirrer for stirring and mixing, and adding 13 parts of ultraviolet absorber, 11 parts of antioxidant, 11 parts of lubricant and 14 parts of wear-resisting agent during stirring for stirring and mixing together;
s3, machine presetting: selecting a proper injection mold to be connected with an injection molding machine body, switching on a power supply to start the machine body, checking the working conditions of all functions of the machine body, and heating and preheating the machine body after checking;
s4, injection molding: and pouring the mixed material into a charging barrel at the top of the injection molding machine, starting the injection molding machine, melting the material by the injection molding machine, extruding the melted material into a mold, and filling, maintaining pressure, cooling and demolding to obtain the formed pull rod body.
Preferably, the filler is heavy calcium carbonate, the ultraviolet absorber is UV327, the antioxidant is DSTP, the lubricant is PE wax, and the wear-resisting agent is polytetrafluoroethylene.
Preferably, the stirring speed is 800-.
Preferably, the temperature of the fixed die is adjusted to 70-80 ℃ and the temperature of the movable die is adjusted to 60-70 ℃ in the preset process of the machine.
Preferably, the cylinder temperature in the injection molding process is 200-.
The invention has the technical effects and advantages that:
the invention has mature process, adopts drying equipment to carry out high-temperature drying treatment on ABS resin before production, ensures that the water content is reduced to be below 0.2 percent, avoids the defects of silver veins, bubbles and the like on the surface of a pull rod product caused by overhigh water content, adds certain ultraviolet absorbent, antioxidant, lubricant and wear-resisting agent into the raw materials, adopts UV327 as the ultraviolet absorbent material, is one of the main varieties of benzotriazole ultraviolet absorbent, has the characteristics of low toxicity, strong ultraviolet absorption capability and the like, can strongly absorb ultraviolet with the wavelength of 270-, the material of the lubricant is PE wax, a lubricating thin layer can be formed on the surface of a plastic melt, the brightness and the glossiness of a product are improved, the wear-resisting agent is polytetrafluoroethylene and has an extremely low friction coefficient, a lubricating thin film can be formed on the surface of the pull rod by PTFE molecules ground out in the friction process, the wear-resisting agent is matched with the lubricant, the good lubricity can be achieved, the wear resistance of the surface of the pull rod is improved, the wear is reduced, the molten material can be prevented from being adhered to the fixed die by distinguishing the temperatures of the fixed die and the movable die, the fixed die is high in temperature, so that the flowability of ABS in the pouring process is good, the ABS can be favorably shaped, the temperature of the movable die is low, the cooling time is favorably shortened, the production efficiency is improved, the temperature of a charging barrel is higher, the smoothness of material injection.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A draw-bar box draw-bar body molding injection molding process comprises the following raw materials in parts by weight: 105 parts of ABS resin, 35 parts of filler, 13 parts of ultraviolet absorber, 11 parts of antioxidant, 11 parts of lubricant and 14 parts of wear-resisting agent, and the method comprises the following steps:
SS1, drying of base materials: 105 parts of ABS resin is selected and placed in a dryer for drying treatment, and the ABS resin is dried for 3 hours at a high temperature of 85 ℃ to ensure that the water content in the ABS resin is lower than 0.2%;
s2, mixing materials: adding 105 parts of dried ABS resin and 35 parts of filler into a stirrer for stirring and mixing, and adding 13 parts of ultraviolet absorber, 11 parts of antioxidant, 11 parts of lubricant and 14 parts of wear-resisting agent during stirring for stirring and mixing together;
s3, machine presetting: selecting a proper injection mold to be connected with an injection molding machine body, switching on a power supply to start the machine body, checking the working conditions of all functions of the machine body, and heating and preheating the machine body after checking;
s4, injection molding: and pouring the mixed material into a charging barrel at the top of the injection molding machine, starting the injection molding machine, melting the material by the injection molding machine, extruding the melted material into a mold, and filling, maintaining pressure, cooling and demolding to obtain the formed pull rod body.
Preferably, the filler is heavy calcium carbonate, the ultraviolet absorber is UV327, the antioxidant is DSTP, the lubricant is PE wax, and the wear-resisting agent is polytetrafluoroethylene.
Preferably, the stirring speed is 1000r/min and the mixing time is 5h when the materials are mixed.
Preferably, the temperature of the fixed die is adjusted to be 75 ℃ and the temperature of the movable die is adjusted to be 65 ℃ in the preset process of the machine.
Preferably, the cylinder temperature in the injection molding process is 230 ℃, the injection pressure is 128Mpa, and the screw rotating speed is 35 r/min.
Example 2
A draw-bar box draw-bar body molding injection molding process comprises the following raw materials in parts by weight: 90 parts of ABS resin, 30 parts of filler, 10 parts of ultraviolet absorber, 9 parts of antioxidant, 9 parts of lubricant and 12 parts of wear-resisting agent, and the method comprises the following steps:
SS1, drying of base materials: 105 parts of ABS resin is selected and placed in a dryer for drying treatment, and the ABS resin is dried for 2 hours at a high temperature of 80 ℃ to ensure that the water content in the ABS resin is lower than 0.2%;
s2, mixing materials: adding 90 parts of dried ABS resin and 30 parts of filler into a stirrer for stirring and mixing, and adding 10 parts of ultraviolet absorber, 9 parts of antioxidant, 9 parts of lubricant and 12 parts of wear-resisting agent during stirring for stirring and mixing together;
s3, machine presetting: selecting a proper injection mold to be connected with an injection molding machine body, switching on a power supply to start the machine body, checking the working conditions of all functions of the machine body, and heating and preheating the machine body after checking;
s4, injection molding: and pouring the mixed material into a charging barrel at the top of the injection molding machine, starting the injection molding machine, melting the material by the injection molding machine, extruding the melted material into a mold, and filling, maintaining pressure, cooling and demolding to obtain the formed pull rod body.
Preferably, the filler is heavy calcium carbonate, the ultraviolet absorber is UV327, the antioxidant is DSTP, the lubricant is PE wax, and the wear-resisting agent is polytetrafluoroethylene.
Preferably, the stirring speed is 800r/min and the mixing time is 4h when the materials are mixed.
Preferably, the temperature of the fixed die is adjusted to 70 ℃ and the temperature of the movable die is adjusted to 60 ℃ in the preset process of the machine.
Preferably, the cylinder temperature in the injection molding process is 200 ℃, the injection pressure is 128Mpa, and the screw rotating speed is 30 r/min.
Example 3
A draw-bar box draw-bar body molding injection molding process comprises the following raw materials in parts by weight: 120 parts of ABS resin, 40 parts of filler, 16 parts of ultraviolet absorber, 13 parts of antioxidant, 13 parts of lubricant and 16 parts of wear-resisting agent, and the method comprises the following steps:
SS1, drying of base materials: selecting 120 parts of ABS resin, placing the ABS resin in a dryer for drying treatment, and drying the ABS resin for 4 hours at a high temperature of 90 ℃ to ensure that the water content in the ABS resin is lower than 0.2%;
s2, mixing materials: adding 120 parts of dried ABS resin and 40 parts of filler into a stirrer for stirring and mixing, and adding 16 parts of ultraviolet absorber, 13 parts of antioxidant, 13 parts of lubricant and 16 parts of wear-resisting agent during stirring for stirring and mixing together;
s3, machine presetting: selecting a proper injection mold to be connected with an injection molding machine body, switching on a power supply to start the machine body, checking the working conditions of all functions of the machine body, and heating and preheating the machine body after checking;
s4, injection molding: and pouring the mixed material into a charging barrel at the top of the injection molding machine, starting the injection molding machine, melting the material by the injection molding machine, extruding the melted material into a mold, and filling, maintaining pressure, cooling and demolding to obtain the formed pull rod body.
Preferably, the filler is heavy calcium carbonate, the ultraviolet absorber is UV327, the antioxidant is DSTP, the lubricant is PE wax, and the wear-resisting agent is polytetrafluoroethylene.
Preferably, the stirring speed is 1200r/min and the mixing time is 6h when the materials are mixed.
Preferably, the temperature of the fixed die is adjusted to 80 ℃ and the temperature of the movable die is adjusted to 70 ℃ in the machine presetting process.
Preferably, the cylinder temperature in the injection molding process is 260 ℃, the injection pressure is 128Mpa, and the screw rotation speed is 40 r/min.
In summary, the following steps: compared with other treatment processes, the injection molding process for the draw-bar body of the draw-bar box provided by the invention has the following advantages: the process is mature, drying equipment is adopted to carry out high-temperature drying treatment on the ABS resin before production, the moisture content of the ABS resin is ensured to be reduced to be below 0.2 percent, the defects that silver lines, bubbles and the like are generated on the surface of a pull rod product caused by overhigh moisture content are avoided, certain ultraviolet absorbent, antioxidant, lubricant and wear-resisting agent are added into the raw materials, the ultraviolet absorbent is made of UV327 which is one of main varieties of benzotriazole ultraviolet absorbent, has the characteristics of low toxicity, strong ultraviolet absorption capability and the like, can strongly absorb ultraviolet with the wavelength of 270-380 nm, has stable chemical property, extremely small volatility and good compatibility, can improve the ultraviolet resistance of the pull rod, and the antioxidant is made of DSTP which can delay or inhibit the oxidation process of the polymer, thereby preventing the aging of the polymer, prolonging the service life of the polymer, improving the weather resistance and prolonging the service life of the pull rod, the material of the lubricant is PE wax, a lubricating thin layer can be formed on the surface of a plastic melt, the brightness and the glossiness of a product are improved, the wear-resisting agent is polytetrafluoroethylene and has an extremely low friction coefficient, a lubricating thin film can be formed on the surface of the pull rod by PTFE molecules ground out in the friction process, the wear-resisting agent is matched with the lubricant, the good lubricity can be achieved, the wear resistance of the surface of the pull rod is improved, the wear is reduced, the molten material can be prevented from being adhered to the fixed die by distinguishing the temperatures of the fixed die and the movable die, the fixed die is high in temperature, so that the flowability of ABS in the pouring process is good, the ABS can be favorably shaped, the temperature of the movable die is low, the cooling time is favorably shortened, the production efficiency is improved, the temperature of a charging barrel is higher, the smoothness of material injection.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. The utility model provides a draw-bar box pull rod body molding injection molding process which characterized in that: comprises the following raw materials in parts by weight: 90-120 parts of ABS resin, 30-40 parts of filler, 10-16 parts of ultraviolet absorbent, 9-13 parts of antioxidant, 9-13 parts of lubricant and 12-16 parts of wear-resistant agent, and comprises the following steps:
s1, drying the base material: 105 parts of ABS resin is selected and placed in a dryer for drying treatment, and the ABS resin is dried for 2 to 4 hours at a high temperature of between 80 and 90 ℃ to ensure that the water content in the ABS resin is lower than 0.2 percent;
s2, mixing materials: adding 105 parts of dried ABS resin and 35 parts of filler into a stirrer for stirring and mixing, and adding 13 parts of ultraviolet absorber, 11 parts of antioxidant, 11 parts of lubricant and 14 parts of wear-resisting agent during stirring for stirring and mixing together;
s3, machine presetting: selecting a proper injection mold to be connected with an injection molding machine body, switching on a power supply to start the machine body, checking the working conditions of all functions of the machine body, and heating and preheating the machine body after checking;
s4, injection molding: and pouring the mixed material into a charging barrel at the top of the injection molding machine, starting the injection molding machine, melting the material by the injection molding machine, extruding the melted material into a mold, and filling, maintaining pressure, cooling and demolding to obtain the formed pull rod body.
2. The draw-bar box draw-bar body molding injection molding process according to claim 1, characterized in that: the filler is heavy calcium carbonate, the ultraviolet absorbent is UV327, the antioxidant is DSTP, the lubricant is PE wax, and the wear-resisting agent is polytetrafluoroethylene.
3. The draw-bar box draw-bar body molding injection molding process according to claim 1, characterized in that: the stirring speed is 800-1200r/min during the material mixing, and the mixing time is 4-6 h.
4. The draw-bar box draw-bar body molding injection molding process according to claim 1, characterized in that: the temperature of the fixed die is adjusted to 70-80 ℃ and the temperature of the movable die is adjusted to 60-70 ℃ in the machine presetting process.
5. The draw-bar box draw-bar body molding injection molding process according to claim 1, characterized in that: the temperature of the charging barrel is 200-260 ℃, the injection pressure is 128Mpa, and the rotating speed of the screw is 30-40r/min in the injection molding process.
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