Preparation process of ABS (acrylonitrile butadiene styrene) valve body profile

Abstract

The invention provides an ABS (Acrylonitrile Butadiene Styrene) valve body profile preparation process, which relates to the technical field of automobile part manufacturing, and comprises the following steps: preparing an aluminum ingot and an intermediate alloy, in the casting process, controlling the smelting temperature to be 720-740 DEG C, adding a covering agent, braising, slagging off, standing, refining, maintaining related parts of a crystallizer, and carrying out casting cleaning operation; in the extrusion forming process, parameters of all the processes are set; in the casting operation, parameters are controlled, drossing, cleaning and ingot casting slag inclusion prevention are carried out, parameters of all processes are regulated and controlled in extrusion forming, quality control over the appearance, the size and the performance is carried out, a production data curve is made, the stability of profile production is guaranteed, in the aspect of a mold, the area and depth of an inlet of a welding chamber are controlled, a working tape is lengthened, and the production efficiency is improved. By additionally arranging the blocking angle, the surface quality of the profile is improved while the low-power performance of the product is guaranteed, in conclusion, the quality parameter of the profile is improved, and the profile is more durable.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive component manufacturing, and particularly to a preparation process for an ABS valve body profile. Background Art

[0002] As a special functional component in an automobile, the ABS valve body has extremely high requirements for various technical indicators, which poses certain challenges to the mass and stable production of enterprises. When the automobile is running, the sensors of the ABS system continuously monitor the wheel speed. During braking, once the sensors detect that the wheels have a tendency to lock, the ABS valve body will respond quickly and precisely adjust the pressure and flow rate of the brake fluid through the solenoid valve to keep the wheels rotating, prevent the wheels from locking, and enable the vehicle to maintain a certain steering ability and stability during braking;

[0003] The ABS valve body generally uses aluminum alloy profiles. Compared with some high-strength steel materials, the strength of aluminum alloy profiles is relatively low. In special cases where extremely high pressure or impact force is applied, problems such as deformation may occur, and the high-temperature resistance is limited. In a high-temperature environment, its mechanical properties may decline. When exposed to certain corrosive environments for a long time, the aluminum alloy will corrode, affecting its performance and service life. Therefore, the present invention proposes a preparation process for an ABS valve body profile to solve the problems existing in the prior art. Summary of the Invention

[0004] In view of the above problems, the present invention proposes a preparation process for an ABS valve body profile, which optimizes the casting, extrusion, and die aspects, is conducive to improving the quality parameters of the profile, and is more durable.

[0005] To achieve the object of the present invention, the present invention is realized through the following technical solutions: A preparation process for an ABS valve body profile, comprising the following steps:

[0006] S1: Prepare aluminum ingots and master alloys. In the casting process, control the melting temperature at 720 - 740 °C, add a covering agent, simmer, skim the slag, statically refine, maintain the relevant components of the crystallizer, and perform casting cleaning operations;

[0007] S2: In the extrusion molding process, set the extrusion cylinder temperature at 380 - 420 °C, the die upper machine temperature at 450 - 480 °C, the ingot upper machine temperature at 510 ± 10 °C, control the extrusion speed at 4 - 8 mm / s, the product outlet temperature ≥ 500 °C, and the bar temperature gradient at 0 °C;

[0008] S3: In the die treatment, adopt a die structure with a welding chamber inlet area ratio of 1:1.2 - 1.5, a working belt length of 8 - 12 mm, and an obstruction angle of 3 - 5 °, and perform subsequent maintenance.

[0009] A further improvement lies in that: in the said S1, the slag skimming operation includes two directional slag skimmings. The first skimming is to skim the slag to the furnace door, and the second skimming is to push the slag out of the furnace.

[0010] A further improvement lies in that: in the said S1, maintaining the components related to the mold includes the following steps:

[0011] Check whether the adapter plate is damaged or cracked. When the adapter plate is severely damaged or cracked, replace it;

[0012] Use 0# steel wool to polish the dirt on the graphite ring lining and the adapter plate, evenly spray WD-40 rust remover around the graphite ring, and then wipe the graphite ring clean with toilet paper or a cleaning cloth;

[0013] Clean the mold, and tightly plug and level the gap of the adapter sleeve exceeding 5 mm with aluminosilicate felt;

[0014] Use a small brush to dip boron nitride coating to paint the adapter plate of each mold, and then carefully paint the joints inside the mold, and paint 2 - 3 times;

[0015] After completion, use toilet paper or a cleaning cloth to clean the graphite ring stained with the coating again.

[0016] A further improvement lies in that: in the said S1, the casting cleaning operation includes the following steps:

[0017] Remove the casting residues of the previous furnace;

[0018] Clean the foreign matters after grinding;

[0019] Repair the joints and cracks;

[0020] Paint talcum powder;

[0021] Clean and install the filter plate;

[0022] Bake the flow plate and the runner, and clean them after baking.

[0023] A further improvement lies in that: in the said S2, after setting the parameters, perform water mist quenching until the product temperature ≤ 80°C, the elongation rate is 0.8 ± 0.2%, the aging treatment is 180 - 200°C × 4 - 6 h, immediately perform pre-stretching after quenching, keep the stretching temperature ≤ 50°C, and the aging treatment adopts stepwise heating, 175 ± 5°C × 7 h.

[0024] A further improvement lies in that: in the said S2, it further includes:

[0025] The cooling adopts a gradient water cooling system, with the water volume at the head being 20 - 30 L / min and the water volume at the tail being 50 - 70 L / min;

[0026] Record the amount of water at any time during the cooling process, and collect data for analysis at all times;

[0027] The thickness of the press residue is controlled to be 10-15% of the ingot diameter.

[0028] A further improvement lies in that: in the step S2, quality control is carried out simultaneously, including the following steps:

[0029] Appearance inspection, regularly check the surface of the profile;

[0030] Dimension measurement, use measuring tools such as calipers and micrometers to measure the key dimensions of the profile;

[0031] Performance detection, conduct physical performance detection on the extruded ABS valve body profile.

[0032] A further improvement lies in that: in the step S3, the mold treatment further includes:

[0033] Control the surface roughness Ra of the working belt ≤ 0.4 μm;

[0034] Control the depth of the welding chamber to be 1.2-1.5 times the maximum dimension of the profile cross-section.

[0035] A further improvement lies in that: in the step S3, the maintenance includes the following steps:

[0036] After each use, clean the debris and residual materials on the mold surface, wipe the mold with a clean cloth, and apply an anti-rust agent;

[0037] According to the specified maintenance cycle, conduct a comprehensive maintenance on the mold, disassemble each component of the mold, conduct a thorough cleaning, remove impurities, check the mating clearance of the mold, and repair or replace the severely worn parts.

[0038] A further improvement lies in that: when the mold is stored for a long time, conduct a comprehensive cleaning and anti-rust treatment. After applying anti-rust oil on the mold surface, wrap it with plastic film or oil paper, store it in a dry and ventilated environment, and regularly check the storage situation.

[0039] The beneficial effects of the present invention are:

[0040] 1. In the casting operation of the present invention, by controlling parameters, skimming slag, and cleaning, the inclusion in the ingot is prevented. In the extrusion molding process, the parameters of each process are regulated, and quality control of appearance, dimensions, and performance is carried out. The production data curve is made to ensure the stability of the profile production. In terms of the mold, the inlet area and depth of the welding chamber are controlled, the working belt is lengthened, and the blocking angle is added to ensure the low magnification performance of the product while improving the surface quality of the profile. In summary, the quality parameters of the profile are improved and it is more durable. Description of the Drawings

[0041] Figure 1 is the flow chart of the present invention;

[0042] Figure 2 is the schematic diagram of the chemical composition of the profile of the present invention;

[0043] Figure 3 is the schematic diagram of the mechanical properties of the profile of the present invention. Specific embodiments

[0044] To deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0045] Embodiment 1

[0046] According to Figure 1 、 2 、as shown in FIG. 3, this embodiment proposes a preparation process for an ABS valve body profile, including the following steps:

[0047] S1: Prepare aluminum ingots and master alloys. In the casting process, control the melting temperature at 720 - 740 °C, add a covering agent, simmer, then skim the slag, statically refine, maintain the relevant components of the mold, and perform casting cleaning operations; the slag skimming operation includes two directional slag skimmings. The first skimming is to the furnace door, and the second skimming is to push the slag out of the furnace; before casting, blow the runner plate three times with compressed air (first horizontally and then vertically, with a pressure of 0.4 - 0.6 MPa); use hot air to bake the runner plate at two workstations synchronously, with a baking temperature of 350 - 400 °C for 45 - 60 min. Casting stage: The covering agent is a Na 2 SiF 6 +KCl composite agent (mass ratio 1:3), with an addition amount of 0.3 - 0.5 wt.%; for refining, rotate and spray argon gas (purity ≥ 99.99%), with a flow rate of 8 - 12 L / min for 15 - 20 min. Maintaining the relevant components of the mold includes the following steps: Check whether the adapter plate is damaged or cracked. When the adapter plate is severely damaged or cracked, replace it; use 0# steel wool to polish the dirt on the inner lining of the graphite ring and the adapter plate, evenly spray WD - 40 rust remover around the graphite ring, and then wipe the graphite ring clean with toilet paper or a cleaning cloth; clean the mold, and tightly and evenly plug the gap of the adapter sleeve exceeding 5 mm with aluminosilicate felt; use a small brush to apply boron nitride coating to the adapter plate of each mold, and then carefully apply the coating to the joints inside the mold, applying 2 - 3 times; after completion, use toilet paper or a cleaning cloth to clean the graphite ring stained with the coating again; the casting cleaning operation includes the following steps: Remove the casting residues from the previous furnace; clean the foreign objects after grinding; repair the joints and cracks; apply talcum powder; clean and install the filter plate; bake the runner plate and runner, and perform cleaning after baking.

[0048] S2: During extrusion molding, set the temperature of the extrusion cylinder at 380 - 420 °C, the temperature of the die on the machine at 450 - 480 °C, the temperature of the ingot on the machine at 510 ± 10 °C, control the extrusion speed at 4 - 8 mm / s, the product outlet temperature ≥ 500 °C, and the rod temperature gradient 0 °C; after setting the parameters, conduct water spray quenching until the product temperature ≤ 80 °C, the elongation rate 0.8 ± 0.2%, and aging treatment at 180 - 200 °C × 4 - 6 h. Immediately conduct pre-stretching after quenching, keep the stretching temperature ≤ 50 °C, and use stage heating for aging treatment, 175 ± 5 °C × 7 h; adopt a gradient water cooling system for cooling, with the water volume at the head 20 - 30 L / min and the water volume at the tail 50 - 70 L / min; record the water volume size at any time during the cooling process, and collect data at all times for analysis; control the butt thickness at 10 - 15% of the ingot diameter; conduct quality control simultaneously, including the following steps: appearance inspection, regularly check the surface of the profile; dimension measurement, use measuring tools such as calipers and micrometers to measure the key dimensions of the profile; performance testing, conduct physical performance testing on the extruded ABS valve body profile. Detect the surface roughness (Ra ≤ 1.6 μm) and wall thickness tolerance (±0.05 mm) of the profile every 30 minutes; conduct tensile strength testing (≥ 380 MPa) and impact strength testing (≥ 25 kJ / m 2 ) for each batch of samples. When the product outlet temperature > 550 °C, automatically trigger a 20% reduction in the extrusion speed and start auxiliary water cooling; when cracks are detected on the surface of the profile, immediately adjust the die temperature to the lower limit value and apply a boron nitride coating.

[0049] S3: In die treatment, adopt a die structure with a ratio of the entrance area of the welding chamber of 1:1.2 - 1.5, a working belt length of 8 - 12 mm, and an obstruction angle of 3 - 5°, and conduct subsequent maintenance. Die treatment also includes: controlling the surface roughness Ra of the working belt ≤ 0.4 μm; controlling the depth of the welding chamber at 1.2 - 1.5 times the maximum dimension of the profile cross-section. Maintenance includes the following steps: After each use, clean the debris and residual materials on the die surface, wipe the die with a clean cloth, and apply an anti-rust agent; conduct comprehensive maintenance on the die according to the specified maintenance cycle, disassemble each component of the die, conduct thorough cleaning, remove impurities, check the mating clearance of the die, and repair or replace severely worn parts. When the die is stored for a long time, conduct comprehensive cleaning and anti-rust treatment. After applying anti-rust oil to the die surface, wrap it with plastic film or oil paper and store it in a dry and ventilated environment, and regularly check the storage situation. Die maintenance includes: Spraying a nano-ceramic anti-sticking coating (thickness 50 - 80 μm) after each use; Repairing the working belt by electric discharge machining (discharge energy 3 - 5 J / mm 2 ) after every 50 extrusions.

[0050] In the present invention, the core process framework integrates the entire process of casting - extrusion - die, refines the key parameters of casting and extrusion, and emphasizes cleanliness control and temperature gradient management; the improvement of the die structure is defined, covering quality monitoring, die maintenance, and abnormal handling systems, forming a complete technical closed - loop; the numerical range has been experimentally verified to balance mechanical properties (tensile strength increased by 15%) and surface quality (roughness reduced by 40%).

[0051] Example Two

[0052] According to Figure 1 、 2 As shown in Figure 3, this embodiment proposes a preparation process for an ABS valve body profile, including the following steps:

[0053] Casting operation

[0054] The surfaces of aluminum ingots and master alloys are clean and dry, and the waste materials are clean without foreign objects such as packing straps.

[0055] When the temperature of the melting furnace is 720 - 740 °C, sprinkle the covering agent, and after stewing for 3 minutes, gently stir the surface of the melt with a forklift (note that the stirring should not be too strong to prevent dross from entering the melt). After the dross and the solvent fully react, remove the dross on the surface of the aluminum liquid (note the dross removal operation. The first rake is raked to the furnace door, and the second rake drives the aluminum dross raked by the first rake out of the furnace).

[0056] After refining in the holding furnace, remove all the surface dross. Before the runner plate is flipped, the caster confirms that the casting tools and other items on the runner plate are cleaned;

[0057] The caster stands on the lifting platform to check whether the adapter plate is damaged or cracked. If the adapter plate is severely damaged or cracked, the caster notifies the die repairer to replace it; the caster uses 0# steel wool to polish the dirt on the inner lining of the graphite ring and the adapter plate, then evenly sprays WD - 40 rust remover around the graphite ring, and then wipes the graphite ring clean with toilet paper or a cleaning cloth; after the mold is cleaned, the caster tightly plugs and levels the gaps of the adapter sleeve exceeding 5 mm with aluminosilicate felt, then uses a small brush dipped in boron nitride coating to coat the adapter plate of each mold, and carefully coats the joints inside the mold; the joints are coated 2 - 3 times; after the caster finishes coating, the graphite ring stained with the coating is cleaned again with toilet paper or a cleaning cloth.

[0058] Casting cleaning operation

[0059] Remove the casting residues from the previous batch: ① Clean from the outlet of the degasser to the end of the runner plate; ② Grind the whole from the degasser to the end of the runner plate; ③ Clean the residual repair material and the fallen dust and slag; ④ Clean the upper edge and corners of the outlet of the filter box.

[0060] Foreign objects after cleaning and grinding: ① Clean the foreign objects from the outlet of the degasser to the end of the flow tray. ② Raise the flap and blow it clean from top to bottom with compressed air. ③ Use compressed air to blow the filter box. ④ After blowing, confirm again that there are no foreign objects in the filter box and the chute.

[0061] Repair joints and cracks: ① Ensure that the operator's gloves or hands are clean. ② Wrap the repair material with a plastic bag. ③ Do not allow the repair material to be placed randomly. ④ Knead the repair material soft, and do not allow it to be repeatedly knocked on the flow tray.

[0062] Apply talcum powder: ① Soak the talcum powder in hot water. ② Ensure that there are no foreign objects or lumps in the storage bucket. ③ Cover the lid after use.

[0063] Clean and install the filter plate: ① Hold both sides of the filter plate at the refractory cotton and take it out of the box. If the surface of the filter plate is dirty, it is not allowed to be used, and do not touch the surface of the filter plate. ② Blow the packaging carton clean, stand one side of the filter plate on the carton, and do not allow it to be directly placed on the ground. ③ Use compressed air to blow horizontally from top to bottom, open the pressure valve 30 - 45 degrees, and keep a distance of 20 - 30 cm from the filter plate. ④ Install the filter plate by holding both sides with both hands. If the filter plate is broken, it is not allowed to be used. Do not knock on the filter plate, ensure there is no gap in the installation, and confirm that there are no foreign objects after installation. ⑤ Gently lower the upper cover of the filter box. If any foreign objects fall, clean them immediately.

[0064] Bake the flow tray and runner: ① The baking equipment is in normal use without any flame spouting. If the flame spouting degree is inconsistent, it needs to be repaired before use. ② The length of the baking burner corresponds to the flow tray. ③ Two baking equipment are started simultaneously with the same baking time, and the baking time meets the process requirements.

[0065] Clean the flow tray and runner after baking: ① Clean up the peeling and falling dust and slag after baking.

[0066] Casting process: ① Complete slag removal before cutting the head and tail lengths of the cast rod. ② Clean the slag removal tools to ensure they are clean without residual aluminum. ③ Personnel are not allowed to walk during the casting process. ④ The cover plate is clean without residual aluminum to prevent foreign objects from falling. If the cover plate is contaminated, it is not allowed to be used. ⑤ After use, stand the cover plate upright to prevent it from sticking to foreign objects.

[0067] Extrusion operation

[0068] Set process parameters, including the temperature of the extrusion cylinder, the temperature of the die on the machine, the temperature of the ingot on the machine, the appropriate extrusion speed, the product outlet temperature, the rod temperature gradient, the aging system, the cooling method, the quenching end temperature, the elongation rate, the stretching temperature, the head and tail cutting, the thickness of the butt. And record the amount of water at any time during the cooling process. Continuously collect data for analysis. Quality control

[0069] Appearance inspection: Regularly check whether the surface of the profile is smooth, flat, and free of defects such as bubbles, scratches, cracks, and lack of material. If there are problems, adjust the process or clean the die in time.

[0070] Dimensional measurement: Use measuring tools such as calipers and micrometers to measure the key dimensions of the profile, such as outer diameter, inner diameter, wall thickness, etc., to ensure that the dimensional deviation is within the allowable range.

[0071] Performance testing: Conduct physical performance testing on the extruded ABS valve body profile, such as tensile strength, impact strength, etc., to ensure that the performance of the profile meets the product standards and usage requirements.

[0072] Mold operation

[0073] The mold design controls the entrance area and depth of the welding chamber, lengthens the working belt, and adds an obstruction angle to ensure the low magnification performance of the product while improving the surface quality of the profile.

[0074] Based on past mold processing and usage experience, feedback problems that occur in the actual production of the mold to the designers, such as difficult demolding, part forming defects, etc., to provide reference for the design of new molds. - Review the design drawings: From the perspectives of processing technology and actual operation, review the mold design drawings, check whether the dimension markings are clear and accurate, whether the structure is convenient for processing and assembly, etc., and put forward improvement suggestions.

[0075] Mold improvement operation: Analyze the problem: Conduct a comprehensive inspection and analysis of the mold that needs to be improved, and determine the specific improvement parts and objectives in combination with the problem records during the production process. Implement the improvement: According to the improvement plan, use corresponding processing equipment and tools to process the mold, such as using electrical discharge machining, wire cutting and other methods to precisely machine the cavity and core of the mold to change its shape or size. After the improvement is completed, conduct trial mold debugging, observe the working state and forming effect of the mold, and make fine adjustments to the mold according to the trial mold results.

[0076] Mold maintenance: Daily maintenance: After each use, promptly clean the sundries and residual materials on the mold surface, wipe the mold with a clean cloth, and apply an appropriate amount of rust inhibitor. Regular maintenance: Conduct a comprehensive maintenance of the mold according to the specified maintenance cycle. Disassemble each component of the mold, conduct a thorough cleaning, remove impurities such as oil stains and iron filings, check the mating clearance of the mold, and repair or replace severely worn parts. Long-term storage maintenance: When the mold is stored for a long time, conduct a comprehensive cleaning and rust prevention treatment. After applying rust-proof oil to the mold surface, wrap it with plastic film or oil paper and store it in a dry and ventilated environment, and regularly check the storage situation.

[0077] Verification example:

[0078] When using the present invention to prepare the ABS valve body profile, the mechanical properties, purity, surface quality requirements, etc. are more perfect and meet the following requirements:

[0079] The composition is AD61 with a high Si content;

[0080] Mechanical property requirements: 350 MPa, 320 MPa, 10%, 25%;

[0081] The hardness is uniform, far exceeding the requirements of the national standard for 6061 alloy (260 MPa, 240 MPa, 8%);

[0082] High purity requirements, with higher requirements for defects than the existing standard of Class AAA;

[0083] High surface quality requirements;

[0084] The macrostructure requirements are higher than the national standard. For the later oxidation of the product, on the basis of GB / T 3246, the requirement of no tailing marks is added.

[0085] In the casting operation of the ABS valve body profile preparation process, by controlling parameters, skimming slag, and cleaning, the inclusion of the ingot is prevented. In the extrusion molding process, the parameters of each process are regulated, and the quality control of appearance, dimensions, and performance is carried out, and the production data curve is made to ensure the stability of the profile production. In terms of the mold, the entrance area and depth of the welding chamber are controlled, the working belt is lengthened, and the obstruction angle is added to ensure the macrostructure performance of the product while improving the surface quality of the profile. In summary, the quality of the profile is improved and it is more durable.

[0086] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A process for preparing an ABS valve body profile, characterized in that: The following steps are involved: S1: Prepare aluminum ingots and master alloys. In the casting process, control the melting temperature to 720-740℃, add covering agent, simmer, remove slag, stand for refining, maintain the relevant parts of the crystallizer, and perform casting cleaning operations; S2: During extrusion molding, set the extrusion barrel temperature to 380-420℃, the mold upper machine temperature to 450-480℃, the ingot upper machine temperature to 510±10℃, control the extrusion speed to 4-8mm / s, the product outlet temperature to ≥500℃, and the rod temperature gradient to 0℃; S3: In mold processing, a mold structure with a welding chamber inlet area ratio of 1:1.2-1.5, a working belt length of 8-12mm, and an obstruction angle of 3-5° is used, and subsequent maintenance is carried out.

2. The ABS valve body profile preparation process according to claim 1, characterized in that: In S1, the slag removal operation includes two directional slag removals, the first rake removes the slag to the furnace door, and the second rake pushes the slag out of the furnace.

3. The ABS valve body profile preparation process according to claim 2, characterized in that: In S1, maintaining the relevant parts of the crystallizer includes the following steps: Check whether the adapter board is damaged or cracked. If the adapter board is severely damaged or cracked, replace it. Use 0# steel wool to clean the dirt on the graphite ring lining and the adapter plate, spray WD-40 rust remover evenly around the graphite ring, and then wipe the graphite ring clean with toilet paper or cleaning cloth; Clean the crystallizer and plug the gap of the adapter sleeve that exceeds 5mm with aluminum silicate felt; Use a small brush dipped in boron nitride paint to paint the adapter plate of each crystallizer, and then carefully paint the joints inside the crystallizer, and paint 2-3 times; After completion, clean the graphite ring stained with paint again with toilet paper or cleaning cloth.

4. The ABS valve body profile preparation process according to claim 3, characterized in that: In S1, the casting cleaning operation includes the following steps: Remove the casting residues from the previous furnace; Clean up foreign matter after grinding; Repair joints and cracks; Apply talcum powder; Clean and install filter plates; Bake the convection plate and flow channel, and clean them after baking.

5. The ABS valve body profile preparation process according to claim 1, characterized in that: In S2, after setting the parameters, water mist quenching is performed until the product temperature is ≤80°C, the elongation is 0.8±0.2%, and the aging treatment is 180-200°C×4-6h. Pre-stretching is performed immediately after quenching, and the stretching temperature is maintained at ≤50°C. The aging treatment adopts staged heating, 175±5°C×7h.

6. The process for preparing an ABS valve body profile according to claim 5, characterized in that: The S2 further includes: The cooling adopts a gradient water cooling system, with a water volume of 20-30L / min at the head and 50-70L / min at the tail; Record the amount of water at any time during the cooling process and collect data for analysis at all times; The excess thickness is controlled to be 10-15% of the ingot diameter.

7. The process for preparing an ABS valve body profile according to claim 6, characterized in that: In S2, quality control is performed synchronously, including the following steps: Appearance inspection: check the profile surface regularly; Dimension measurement, using calipers, micrometers and other measuring tools to measure the key dimensions of the profile; Performance testing: physical performance testing of extruded ABS valve body profiles.

8. The ABS valve body profile preparation process according to claim 1, characterized in that: In S3, the mold processing further includes: Control the working belt surface roughness Ra≤0.4μm; The depth of the welding chamber is controlled to be 1.2-1.5 times the maximum size of the profile section.

9. The process for preparing an ABS valve body profile according to claim 8, characterized in that: In S3, the maintenance includes the following steps: After each use, clean the debris and residual materials on the mold surface, wipe the mold with a clean cloth, and apply anti-rust agent; According to the prescribed maintenance cycle, the mold is fully maintained, the various components of the mold are disassembled, thoroughly cleaned, impurities are removed, the mold fitting clearance is checked, and the severely worn parts are repaired or replaced.

10. The process for preparing an ABS valve body profile according to claim 9, characterized in that: When the mold is stored for a long time, it should be thoroughly cleaned and rust-proofed. After applying anti-rust oil on the mold surface, it should be wrapped with plastic film or oil paper and stored in a dry and ventilated environment. The storage condition should be checked regularly.

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