Inserting gun winding seat injection molding part and preparation method thereof
By using a reasonable ratio of PC and ABS and compounding of additives, combined with an optimized injection molding process, injection molded gun winding seats with high strength, high temperature resistance and good formability are prepared. This solves the problems of insufficient high temperature resistance and formability in the existing technology, and improves product performance and production efficiency.
Patent Information
- Application Number
- CN202511877746.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-03-06
AI Technical Summary
Existing injection molded gun winding sockets have deficiencies in high temperature resistance, rigidity, and moldability, resulting in short product lifespan and low pass rate.
Using polycarbonate (PC) and acrylonitrile-butadiene-styrene copolymer (ABS) as the main raw materials, along with compatibilizers, toughening agents, antioxidants, and lubricants, and by optimizing the proportions and injection molding process parameters, injection molded gun winding seats with high strength, high temperature resistance, and good formability are prepared.
It achieves high impact resistance, dimensional stability and aging resistance in injection-molded parts for insert gun winding seats, improves product qualification rate and production efficiency, reduces production costs, and is suitable for large-scale industrial production.
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Abstract
Description
Technical Field
[0001] This application relates to the technical field of polymer materials, specifically to an injection molded part for inserting a wire winding seat and its preparation method. Background Technology
[0002] The plug cable winder is a key component in charging equipment, electrical tools and other products. It is mainly used to store and fix the plug cable. It needs to have sufficient strength to withstand the tension when the cable is wound, good impact resistance to cope with collisions during use, and excellent dimensional stability and aging resistance to ensure that no deformation or cracking occurs during long-term use.
[0003] Currently, most insert gun winding bases are injection molded from a single plastic material. For example, pure ABS material has good moldability and excellent impact resistance, but insufficient high-temperature resistance and rigidity, making it prone to deformation after long-term use. Pure PC material has high strength and high-temperature resistance, but it is difficult to mold, has poor toughness, and is more expensive. In addition, problems such as unreasonable raw material ratios and improper injection molding parameter settings in existing manufacturing processes further affect the overall performance of injection molded parts, resulting in low product qualification rates and short service life.
[0004] Therefore, developing a reasonably formulated and high-performance injection-molded gun winding seat and its efficient preparation method has significant practical application value. Summary of the Invention
[0005] To address the aforementioned technical problems, this application provides an injection molded part for inserting a wire winding seat and its preparation method.
[0006] This application provides an injection molded part for inserting a wire winding seat, specifically comprising the following components in parts by weight: 100 parts of main material, 3-7 parts of compatibilizer, 5-9 parts of toughening agent, 0.5-2 parts of antioxidant, and 0.3-1 parts of lubricant; The main material is composed of polycarbonate and acrylonitrile-butadiene-styrene copolymer in a weight ratio of 7-9:1-3; The compatibilizer is selected from maleic anhydride-grafted ABS or maleic anhydride-grafted POE. The toughening agent is composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 6-10:1-5.
[0007] The injection molded parts provided in this application are made primarily from PC (polycarbonate) and ABS (acrylonitrile-butadiene-styrene copolymer), supplemented with compatibilizers, toughening agents, antioxidants, and lubricants. By optimizing the ratio of PC to ABS and selecting appropriate additives, combined with specific injection molding process parameters, this application enables the prepared insert gun winding seat injection molded parts to possess both the high strength and high-temperature resistance of PC and the good moldability and impact resistance of ABS. Simultaneously, it exhibits excellent dimensional stability and aging resistance, meeting the requirements for load-bearing, wear resistance, and repeated bending during insert gun winding. The manufacturing method is simple, has high molding efficiency, and controllable production costs, making it suitable for large-scale industrial production.
[0008] In this application, PC serves as the base material, providing high strength, high temperature resistance, and excellent mechanical properties, while ABS improves the material's moldability and impact resistance. The synergistic effect of both provides a solid performance foundation for the injection-molded parts. The addition of a compatibilizer is key to resolving the compatibility issue between PC and ABS. Using maleic anhydride-grafted ABS or maleic anhydride-grafted POE effectively reduces the interfacial tension between PC and ABS, promotes uniform dispersion of the two phases, and improves the material's mechanical properties and stability. The toughening agent selected is core-derived EPDM, which significantly improves the impact resistance of the injection-molded parts without significantly reducing material rigidity, meeting the collision requirements during use. Preferably, the injection molded part of the insert gun winding seat specifically includes the following components in parts by weight: 100 parts of main material, 4-6 parts of compatibilizer, 6-8 parts of toughening agent, 1-1.5 parts of antioxidant, and 0.5-0.7 parts of lubricant.
[0009] Preferably, in the main material, the polycarbonate is selected from any one or two of Covestro 2407 and Covestro 6485; the acrylonitrile-butadiene-styrene copolymer is selected from any one or two of Taiwan Chi Mei PA-777D and Zhenjiang Chi Mei PA-757K.
[0010] Preferably, the main material is composed of polycarbonate and acrylonitrile-butadiene-styrene copolymer in a weight ratio of 7.5-8.5:1.5-2.5.
[0011] Preferably, the toughening agent is composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 7-9:2-4.
[0012] Preferably, the antioxidant is composed of hindered phenolic antioxidants and phosphite antioxidants in a weight ratio of 1:2-4.
[0013] Preferably, the lubricant is one or more of calcium stearate, zinc stearate, and vinyl bis-stearamide.
[0014] The antioxidant uses a combination of hindered phenols and phosphites, which can synergistically exert a thermo-oxidative stabilizing effect, delay the aging and degradation of materials during processing and use, and extend the service life of products; the lubricant can improve the processing fluidity of materials, reduce the friction between the melt and equipment and molds, improve the surface finish of injection molded parts, and avoid demolding difficulties.
[0015] This application also provides a method for preparing the injection molded drawer panel, comprising the following steps: weighing the corresponding weights of each raw material component, mixing them evenly to obtain a mixture; and then performing melt blending and injection molding to obtain the final product.
[0016] Preferably, the melt blending is carried out in a twin-screw extruder with a length-to-diameter ratio of 35-45:1 and a rotation speed of 100-200 rpm. The extruder has six heating zones, and the temperatures of each zone from the feed port to the die head are as follows: Zone 1: 280-290℃; Zone 2: 270-280℃; Zone 3: 260-270℃; Zone 4: 255-265℃; Zone 5: 250-260℃; Zone 6: 235-245℃.
[0017] Preferably, the injection molding process parameters are as follows: barrel temperature 220-240℃, injection pressure 110-150MPa, injection speed 30-50mm / s; holding pressure zones: zone 1 pressure 55-65MPa, time 1-2h, zone 2 pressure 40-50MPa, time 4-8h, zone 3 pressure 15-25MPa, time 0.5-1.5h, mold temperature 50-60℃, cooling time 20-40s.
[0018] This application provides a method for preparing the above-mentioned injection molded part of the insert gun winding seat, including raw material pretreatment, mixing and batching, melt blending and granulation, injection molding and post-treatment steps; in the mixing and batching stage, high-speed mixing ensures uniform dispersion of each raw material; during melt blending and granulation, by optimizing the temperature, speed and other parameters of the twin-screw extruder, the material is fully melted and sheared, improving the uniformity and stability of the modified plastic; in the injection molding stage, the barrel temperature, mold temperature, injection pressure, holding pressure and other parameters are reasonably set to ensure complete mold filling and stable molding, which can eliminate internal stress of the injection molded part and further improve dimensional stability.
[0019] In summary, the technical solution of this application has the following effects: The injection-molded plug-in cable winding seat of this application uses polycarbonate and acrylonitrile-butadiene-styrene copolymer as the main raw materials. Through reasonable proportioning and compounding of additives, it solves the problems of performance defects of single raw materials and poor compatibility of traditional PC / ABS alloys. It has comprehensive properties such as high impact resistance and dimensional stability, and can withstand the cable winding tension and collision during use. It is not easy to deform or crack after long-term use. The injection molding method for the insert gun winding seat of this application is simple. By pre-treating the raw materials and optimizing the mixing and injection parameters, it ensures uniform material dispersion and stable molding, which improves the product qualification rate and production efficiency, reduces production costs, and is suitable for large-scale industrial production. The raw materials selected in this application are all conventional chemical materials, which are widely available and have controllable costs, and have good economic and social benefits. Detailed Implementation
[0020] The present application will be further described in detail below with reference to embodiments, comparative examples and performance test results. These embodiments should not be construed as limiting the scope of protection claimed in this application.
[0021] Example
[0022] Example 1
[0023] Example 1 provides an injection molded part for inserting a wire winding seat and its preparation method.
[0024] The specific preparation method of the injection molded part of the insert gun winding seat in Example 1 is as follows.
[0025] Raw material pretreatment: Weigh the corresponding weights of each raw material component separately, and dry the polycarbonate and acrylonitrile-butadiene-styrene copolymer separately in an oven at 100℃ for 3 hours to remove moisture; take 100g of the main material (composed of polycarbonate Covestro 6485 and acrylonitrile-butadiene-styrene copolymer Zhenjiang Qimei PA-757K in a weight ratio of 8:2), and then place it in a high-speed mixer at 1000rpm, add 5g of compatibilizer maleic anhydride grafted POE (Dow Chemical, brand name N216), 7g of toughening agent (composed of EPDM K8550C and EPDM K2470C in a weight ratio of 8:3), 1.2g of antioxidant (composed of hindered phenolic antioxidant 1010 and phosphite antioxidant 168 in a weight ratio of 1:3), and 0.6g of lubricant calcium stearate, and stir again for 3 minutes to obtain the mixture. Among them, the high Mooney low ethylene EDMK8550C and low Mooney high ethylene EDMK2470C are sourced from Arlanx Newco High Performance Elastomers (Changzhou) Co., Ltd.
[0026] Melt blending: The mixture is fed into a twin-screw extruder for melt blending and granulation. The process parameters are set as follows: length-to-diameter ratio of 40:1, rotation speed of 150 rpm, and six heating zones with the following temperatures: Zone 1: 285℃, Zone 2: 275℃, Zone 3: 265℃, Zone 4: 260℃, Zone 5: 255℃, and Zone 6: 240℃. After the extruded material is cooled by a cooling water tank, it is dried using a hot air dryer and then processed into pellets using a pelletizer.
[0027] Injection Molding: The granules are fed into the injection molding machine through a vacuum feeder for injection molding. The process parameters are set as follows: the granules are melted and plasticized at a barrel temperature of 230℃, and then injected into a mold at a temperature of 55℃ under an injection pressure of 120MPa and an injection speed of 40mm / s. The holding pressure parameters are set as follows: Zone 1 pressure 60MPa, time 1.5h; Zone 2 pressure 45MPa, time 6h; Zone 3 pressure 20MPa, time 1h; after filling the mold, the granules are cooled for 33s to solidify; after inspection and packaging, the injection-molded part for insert gun winding seat is obtained.
[0028] Examples 2-6 Examples 2-6 respectively provide an injection molded part for insert gun winding seat and its preparation method.
[0029] The difference between the above embodiments and Embodiment 1 is that the composition of the main ingredients is different, as shown below.
[0030] In Example 2: The main material is composed of polycarbonate Covestro 6485 and acrylonitrile-butadiene-styrene copolymer Zhenjiang Chimei PA-757K in a weight ratio of 7.5:2.5.
[0031] In Example 3: The main material is composed of polycarbonate Covestro 6485 and acrylonitrile-butadiene-styrene copolymer Zhenjiang Chimei PA-757K in a weight ratio of 8.5:1.5.
[0032] In Example 4: The main material is composed of polycarbonate Covestro 6485 and acrylonitrile-butadiene-styrene copolymer Zhenjiang Chimei PA-757K in a weight ratio of 7:3.
[0033] In Example 5: The main material is composed of polycarbonate Covestro 6485 and acrylonitrile-butadiene-styrene copolymer Zhenjiang Chimei PA-757K in a weight ratio of 9:1.
[0034] In Example 6: The main material is composed of polycarbonate Covestro 2407 and acrylonitrile-butadiene-styrene copolymer Taiwan Chi Mei PA-777D in a weight ratio of 8:5.
[0035] All other process parameters in the above embodiments are the same as those in Embodiment 1.
[0036] Examples 7-10 Examples 7-10 respectively provide an injection molded part for insert gun winding seat and its preparation method.
[0037] The difference between the above embodiments and Embodiment 1 is that the toughening agent has a different composition, as shown below.
[0038] In Example 7: The toughening agent is composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 7:4.
[0039] In Example 8: The toughening agent is composed of EPDM K8550C and EPDM K2470C mixed in a weight ratio of 9:2.
[0040] In Example 9: The toughening agent is composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 6:5.
[0041] In Example 10: The toughening agent is composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 10:1.
[0042] All other process parameters in the above embodiments are the same as those in Embodiment 1.
[0043] Examples 11-12 Examples 11-12 respectively provide an injection molded part for insert gun winding seat and its preparation method.
[0044] The difference between the above embodiments and Embodiment 1 is that the toughening agent has a different composition, as shown below.
[0045] In Example 11, the pressure holding zone parameters were set as follows: Zone 1 pressure 50MPa, time 1.5h; Zone 2 pressure 35MPa, time 6h; Zone 3 pressure 10MPa, time 1h.
[0046] In Example 12: The pressure holding zone parameters are set as follows: Zone 1 pressure 60MPa, time 6h; Zone 2 pressure 45MPa, time 2h; Zone 3 pressure 20MPa, time 2h.
[0047] All other process parameters in the above embodiments are the same as those in Embodiment 1.
[0048] Comparative Example Comparative Examples 1-4 Comparative Examples 1-4 each provide an injection molded part for inserting a wire winding seat and its preparation method.
[0049] The difference between the above comparative example and Example 1 is as follows:
[0050] In Comparative Example 1: the main material is composed of polycarbonate Covestro 6485 and acrylonitrile-butadiene-styrene copolymer Zhenjiang Chimei PA-757K in a weight ratio of 2:8.
[0051] In Comparative Example 2, the main material was composed of polycarbonate Covestro 6485 and POE (Dow Chemical, grade 8480) in a weight ratio of 8:2.
[0052] In Comparative Example 3, the toughening agent was composed of a mixture of EPDM K8550C and EPDM S501A in a weight ratio of 8:3. The low Mooney ethylene EPDM S501A was sourced from Ningbo SK Synthetic Rubber Co., Ltd.
[0053] In Comparative Example 4, the toughening agent was composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 3:8.
[0054] All other process parameters in the above comparative examples are the same as those in Example 1.
[0055] Performance testing Impact resistance: The notched impact strength of the sample shall be tested according to the method specified in GB / T 1843.
[0056] Dimensional shrinkage rate: The dimensional shrinkage rate of the sample shall be tested in accordance with the method specified in GB / T 15585.
[0057] Aging resistance: The samples were placed under aging conditions of 120℃ for 100h, and the impact strength retention rate and dimensional shrinkage rate of the samples were tested.
[0058] Test results are shown in Table 1.
[0059] Table 1 Performance test results of injection molded parts with insert gun winding seats in the examples and comparative examples
[0060] As can be seen from the test results in Table 1 above, the injection molded insert gun winding seat prepared using the technical solution provided in this application has excellent impact resistance, and the material has excellent dimensional stability and aging resistance.
[0061] Comparing the test results of Examples 1-6 and Comparative Examples 1-2, it can be seen that the type of main material has a significant impact on the performance of the injection molded part material. In Comparative Example 1, the main material was composed of a mixture of polycarbonate Covestro 6485 and acrylonitrile-butadiene-styrene copolymer Zhenjiang Qimei PA-757K in a weight ratio of 2:8. In Comparative Example 2, the main material was composed of a mixture of polycarbonate Covestro 6485 and POE (Dow Chemical, grade 8480) in a weight ratio of 8:2. The material prepared by these two examples had poor performance. In contrast, the injection molded part material prepared by this application using a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer in a weight ratio of 7-9:1-3 exhibits excellent performance.
[0062] By comparing the test results of Examples 1, 7-10, and Comparative Examples 3-4, it can be seen that the type of toughening agent has a significant impact on the performance of the product. In Comparative Example 3, the toughening agent was a mixture of EPDM K8550C and EPDM S501A in a weight ratio of 8:3. In Comparative Example 4, the toughening agent was a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 3:8, and the resulting material had poor performance. In contrast, this application utilizes a toughening agent composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 6-10:1-5, resulting in injection molded parts with excellent performance.
[0063] By comparing the test results of Examples 1 and 11-12, it can be seen that the holding pressure zone in the injection molding process has a significant impact on the performance of the product. This application further improves the performance of the injection molded part material by controlling the process parameters of the holding pressure zone as follows: Zone 1 pressure 55-65MPa, time 1-2h; Zone 2 pressure 40-50MPa, time 4-8h; Zone 3 pressure 15-25MPa, time 0.5-1.5h.
[0064] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.
Claims
1. An injection molded part of a cord grip, characterized in that, Specifically comprising the following components by weight: 100 parts of main material, 3-7 parts of compatibilizer, 5-9 parts of toughening agent, 0.5-2 parts of antioxidant, 0.3-1 part of lubricant; The main material is composed of a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer in a weight ratio of 7-9:1-3; The compatibilizer is selected from maleic anhydride grafted ABS or maleic anhydride grafted POE; The toughening agent is composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 6-10:1-5.
2. The plug-in gun wrap-around cord holder injection molded piece of claim 1, wherein, Specifically comprising the following components by weight: 100 parts of main material, 4-6 parts of compatibilizer, 6-8 parts of toughening agent, 1-1.5 parts of antioxidant, 0.5-0.7 parts of lubricant.
3. The plug-in gun wrap-around cord holder injection molded piece of claim 1, wherein, In the main material, the polycarbonate is selected from any one or both of Covestro 2407 and Covestro 6485; the acrylonitrile-butadiene-styrene copolymer is selected from any one or both of Taiwan Chi Mei PA-777D and Zhenjiang Chi Mei PA-757K.
4. The plug-in gun wrap-around cord holder injection molded piece of claim 1, wherein, The main material is composed of a mixture of polycarbonate and acrylonitrile-butadiene-styrene copolymer in a weight ratio of 7.5-8.5:1.5-2.
5.
5. The plug-in gun wrap-around cord holder injection molded piece of claim 1 wherein, The toughening agent is composed of a mixture of EPDM K8550C and EPDM K2470C in a weight ratio of 7-9:2-4.
6. The plug-in gun wrap-around cord holder injection molded piece of claim 1, wherein, The antioxidant is composed of a hindered phenolic antioxidant and a phosphite antioxidant in a weight ratio of 1:2-4.
7. The plug-in gun wrap-around cord holder injection molded piece of claim 1 wherein, The lubricant is one or more of calcium stearate, zinc stearate, and vinyl bis stearamide.
8. The method of claim 1-7, wherein, The method comprises the following steps: Respectively weigh the corresponding weight of each raw material component, mix uniformly to obtain a mixture; melt blend, injection molding, and the like.
9. The method of claim 8, wherein the injection-molded drawer panel component is prepared by, The melt blending is carried out in a twin-screw extruder with a length-diameter ratio of 35-45:1 and a rotation speed of 100-200 rpm, and has six heating zones with temperatures from the feeding port to the die head as follows: zone one temperature 280-290℃, zone two temperature 270-280℃, zone three temperature 260-270℃, zone four temperature 255-265℃, zone five temperature 250-260℃, and zone six temperature 235-245℃.
10. The method of claim 8, wherein the injection molding of the drawer panel is performed by a process comprising: The process parameters of the injection molding are as follows: barrel temperature 220-240℃, injection pressure 110-150MPa, injection speed 30-50mm / s; holding pressure zone: zone one pressure 55-65MPa, time 1-2h, zone two pressure 40-50MPa, time 4-8h, zone three pressure 15-25MPa, time 0.5-1.5h, mold temperature 50-60℃, and cooling time 20-40s.