CN104802377B - A kind of manufacturing method of 3D curved surface lens - Google Patents
A kind of manufacturing method of 3D curved surface lens Download PDFInfo
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- 238000002347 injection Methods 0.000 claims description 6
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- 229920003023 plastic Polymers 0.000 claims description 6
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
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- 239000000463 material Substances 0.000 claims description 3
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- 239000000047 product Substances 0.000 abstract description 27
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Classifications
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- 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
- B29C45/1703—Introducing an auxiliary fluid into the mould
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- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/57—Exerting after-pressure on the 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
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- 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
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- 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
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- 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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/1704—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles
- B29C2045/1729—Introducing an auxiliary fluid into the mould the fluid being introduced into the interior of the injected material which is still in a molten state, e.g. for producing hollow articles fluid venting means
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- 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
- B29C2945/76551—Time
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- 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
- B29C2945/76585—Dimensions, e.g. thickness
- B29C2945/76591—Dimensions, e.g. thickness volume
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- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
技术领域technical field
本发明涉及压缩注塑成型工艺，特别是涉及一种3D曲面镜片的制造方法。The invention relates to a compression injection molding process, in particular to a manufacturing method of a 3D curved lens.
背景技术Background technique
目前3D曲面玻璃制作都是采用3D成型玻璃技术加工的，3D成型玻璃技术是将玻璃放在弧形模具之间，加热到800℃接近熔化的边缘，再压进弧形模具里让玻璃弯曲后，通过CNC精雕机加工和抛光处理，再热转印装饰图纹进行视觉效果处理。3D成型玻璃的加工良率偏低，总体良率低于50％，生产无法达到量产，3D成型玻璃加工，CNC精雕机的机台数量需求很大，投资成本高，且CNC磨抛一片3D成型玻璃的时间在40分钟以上，加工效率不到普通盖板玻璃的五分之一。由于3D成型玻璃加工十分困难，目前3D成型的前盖板玻璃市场价格是普通玻璃8到10倍，3D成型的后盖板的玻璃也是普通玻璃4到5倍。透明塑料正在逐步取代3D曲面玻璃的主导地位，产品具有轻薄、透明洁净、抗指纹、防眩光、坚硬、耐刮伤等优点，但目前还没有成型3D曲面塑胶镜片的工艺。At present, the production of 3D curved glass is processed by 3D forming glass technology. The 3D forming glass technology is to place the glass between the curved molds, heat it to 800°C to the edge of melting, and then press it into the curved mold to bend the glass. , through CNC engraving machining and polishing treatment, and then heat transfer decorative patterns for visual effect processing. The processing yield rate of 3D shaped glass is low, the overall yield rate is lower than 50%, and the production cannot reach mass production. For 3D shaped glass processing, the number of CNC engraving machines is in great demand, and the investment cost is high. The time for 3D forming glass is more than 40 minutes, and the processing efficiency is less than one-fifth of that of ordinary cover glass. Because the processing of 3D shaped glass is very difficult, the current market price of 3D shaped front cover glass is 8 to 10 times that of ordinary glass, and the glass of 3D shaped rear cover is 4 to 5 times that of ordinary glass. Transparent plastic is gradually replacing the dominant position of 3D curved glass. The product has the advantages of light and thin, transparent and clean, anti-fingerprint, anti-glare, hard, and scratch-resistant. However, there is no process for molding 3D curved plastic lenses.
发明内容Contents of the invention
为了弥补上述现有技术的不足，本发明提出一种3D曲面镜片的制造方法。In order to make up for the shortcomings of the above-mentioned prior art, the present invention proposes a method for manufacturing a 3D curved lens.
本发明的技术问题通过以下的技术方案予以解决：Technical problem of the present invention is solved by following technical scheme:
一种3D曲面镜片的制造方法，包括如下步骤：A method for manufacturing a 3D curved lens, comprising the steps of:
注塑步骤：熔料从模腔的一侧射入，当所述熔料填充所述模腔体积的10％～40％时，往所述模腔中射入辅助气体；Injection molding step: the molten material is injected from one side of the mold cavity, and when the molten material fills 10% to 40% of the volume of the mold cavity, an auxiliary gas is injected into the mold cavity;
压缩步骤：当所述熔料填充所述模腔体积的45％～90％时，排出所述辅助气体，所述模腔内部开始进行压缩，得到所述3D曲面镜片。Compression step: when the molten material fills 45% to 90% of the volume of the mold cavity, the auxiliary gas is discharged, and the inside of the mold cavity starts to be compressed to obtain the 3D curved lens.
如果按照压缩注塑成型的工艺直接成型3D曲面镜片，产品会有大、小头，产品外观不良、尺寸不稳定、翘曲变形、有斜面等现象，根据出现的上述不良调整工艺参数后产品不良问题仍不可控，且不良现象不稳定，为此，本发明在成型的特定的时间内通入辅助气体，将辅助气体直接通入模腔中，然后在压缩步骤时排出辅助气体，通入的辅助气体可以消除产品的内应力，改善产品的上述不良，并保证产品的尺寸精度。If the 3D curved lens is directly molded according to the compression injection molding process, the product will have large and small heads, poor product appearance, unstable size, warping deformation, and slopes, etc., and the product will be defective after adjusting the process parameters according to the above defects. It is still uncontrollable, and the bad phenomenon is unstable. For this reason, the present invention feeds the auxiliary gas during the specific time of molding, directly passes the auxiliary gas into the mold cavity, and then discharges the auxiliary gas during the compression step. The gas can eliminate the internal stress of the product, improve the above-mentioned defects of the product, and ensure the dimensional accuracy of the product.
优选地，所述往所述模腔中射入辅助气体是所述辅助气体在所述模腔的所述熔料射入的一侧以及与该侧相对的一侧同时射入。Preferably, the injection of the auxiliary gas into the mold cavity is that the auxiliary gas is simultaneously injected on the side of the mold cavity where the molten material is injected and the side opposite to this side.
辅助气体从模腔的相对的两侧射入，这样熔料射入模腔的量在模腔的两端为均衡的。The auxiliary gas is injected from opposite sides of the cavity, so that the amount of molten material injected into the cavity is balanced at both ends of the cavity.
优选地，在所述压缩步骤中，当所述熔料填充所述模腔体积的45％～90％的同时，射入的所述辅助气体的体积达到所述模腔体积的10％～30％。Preferably, in the compression step, when the molten material fills 45% to 90% of the cavity volume, the volume of the auxiliary gas injected reaches 10% to 30% of the cavity volume. %.
在以上技术方案中，控制熔料和辅助气体的射入量，使得两者同时在模腔中达到所需的量，然后开始进行压缩，这样成型的产品更均匀，良品率更高。In the above technical solution, the injection amount of molten material and auxiliary gas is controlled so that both of them reach the required amount in the mold cavity at the same time, and then start to compress, so that the molded product is more uniform and the yield rate is higher.
优选地，所述制造方法的主要工艺参数为：模具温度60℃～200℃，成型压力30～200MPa，熔体温度200℃～320℃，熔料注射时间1s～30s，延迟压缩时间1s～10s，压缩速度2mm/s～50mm/s，压缩力1t～10t，压缩时间5s～420s。Preferably, the main process parameters of the manufacturing method are: mold temperature 60°C-200°C, molding pressure 30-200MPa, melt temperature 200°C-320°C, melt injection time 1s-30s, delayed compression time 1s-10s , compression speed 2mm/s ~ 50mm/s, compression force 1t ~ 10t, compression time 5s ~ 420s.
压缩的时间为5s～420s，如果压缩时间太短，会出现产品固化不完全的现象，而如果固化时间长，成型周期长。The compression time ranges from 5s to 420s. If the compression time is too short, the product will not be fully cured, and if the curing time is long, the molding cycle will be long.
优选地，所述3D曲面镜片是透明的塑胶镜片。Preferably, the 3D curved lens is a transparent plastic lens.
优选地，所述熔料是PC或PMMA。Preferably, the melt is PC or PMMA.
优选地，所述3D曲面镜片中的所述3D曲面是弧面。Preferably, the 3D curved surface in the 3D curved lens is a curved surface.
优选地，所述3D曲面镜片的形状为矩形弧面、圆形弧面、椭圆形弧面和多边形弧面中的一种。Preferably, the shape of the 3D curved lens is one of a rectangular arc, a circular arc, an elliptical arc and a polygon arc.
优选地，所述熔料从所述模腔的一侧呈扇形射入。Preferably, the molten material is fan-injected from one side of the mold cavity.
优选地，所述辅助气体为氮气、氩气和氦气中的至少一种。Preferably, the auxiliary gas is at least one of nitrogen, argon and helium.
本发明还具有如下优点：The present invention also has the following advantages:
1、与玻璃成型工艺相比较，本发明工艺简单、工序简洁、成本低、加工周期短，生产效率高、产品良率高。1. Compared with the glass forming process, the present invention has simple process, simple process, low cost, short processing cycle, high production efficiency and high product yield.
2、本发明中采用塑胶原料压缩注塑成型，塑胶原料优先选择PMMA、PC，具有极大的设计自由度且易于塑形，具有轻薄、透明洁净、抗指纹、防眩光、坚硬、耐刮伤等优点。2. In the present invention, plastic raw materials are used for compression injection molding. The plastic raw materials are preferably PMMA and PC, which have great design freedom and are easy to shape. They are light and thin, transparent and clean, anti-fingerprint, anti-glare, hard, and scratch-resistant advantage.
3、本发明的工艺具有较低的注塑压力、均匀的锁模压力作用和较低的部件内应力。3. The process of the present invention has lower injection molding pressure, uniform mold clamping pressure and lower component internal stress.
4、压缩注塑成型后的3D曲面镜片的厚度可以达到0.60mm～3.00mm。4. The thickness of the 3D curved lens after compression injection molding can reach 0.60mm-3.00mm.
5、压缩注塑成型后的3D曲面镜片可以具有多种形状外观，又可增加弧形边缘触控，符合人体学。5. The 3D curved lens after compression injection molding can have a variety of shapes and appearances, and can increase the touch of the curved edge, which is ergonomic.
6、3D曲面镜片的空间大，能解决天线布置空间不足及增强收讯功能，使产品更美观出色，产品设计差异化使消费者更能青睐。6. The 3D curved lens has a large space, which can solve the insufficient space for antenna layout and enhance the reception function, making the product more beautiful and excellent, and the differentiated product design makes consumers more favored.
7、本发明适用于批量生产。7. The present invention is suitable for mass production.
8、突破了只有直接注塑玻璃3D曲面的技术瓶颈，使3D曲面技术多一项新的技术与选择。8. It breaks through the technical bottleneck of direct injection molding of glass 3D curved surface, making 3D curved surface technology an additional new technology and option.
9、与普通注塑成型相比，压缩注塑成型后的产品密度更大，产品硬度高，产品更均匀。9. Compared with ordinary injection molding, the product density after compression injection molding is higher, the product hardness is higher, and the product is more uniform.
10、通过压缩注塑成型的产品收缩均匀、尺寸精度高、稳定性好、变形小，可应用于高端智能手机和平板电脑、可穿戴式设备、仪表板及工业用电脑等领域。10. Products molded by compression injection molding have uniform shrinkage, high dimensional accuracy, good stability, and small deformation. They can be used in high-end smartphones and tablet computers, wearable devices, instrument panels, and industrial computers.
附图说明Description of drawings
图1是本发明的优选实施例中成型3D曲面镜片所需要的模具的简化示意图；Fig. 1 is a simplified schematic diagram of a mold required for forming a 3D curved lens in a preferred embodiment of the present invention;
图2是本发明的优选实施例中成型的3D曲面镜片的结构示意图。Fig. 2 is a schematic structural view of the molded 3D curved lens in the preferred embodiment of the present invention.
具体实施方式detailed description
下面对照附图并结合优选的实施方式对本发明作进一步说明。The present invention will be further described below with reference to the accompanying drawings and in combination with preferred embodiments.
在一些实施例中，3D曲面镜片的制造方法，包括如下步骤：In some embodiments, the method for manufacturing a 3D curved lens includes the following steps:
(1)注塑步骤：熔料从模腔的一侧射入，当所述熔料填充所述模腔体积的10％～40％时，往所述模腔中射入辅助气体；(1) Injection molding step: the molten material is injected from one side of the mold cavity, and when the molten material fills 10% to 40% of the volume of the mold cavity, an auxiliary gas is injected into the mold cavity;
(2)压缩步骤：当所述熔料填充所述模腔体积的45％～90％时，排出所述辅助气体，所述模腔内部开始进行压缩，得到所述3D曲面镜片。(2) Compression step: when the molten material fills 45% to 90% of the volume of the mold cavity, the auxiliary gas is discharged, and the inside of the mold cavity starts to be compressed to obtain the 3D curved lens.
在一个优选的实施例中，包括：In a preferred embodiment, including:
如图2所示，成型的3D曲面镜片的形状为矩形弧面，采用的熔料为PC，最终成型的3D曲面镜片是透明的，厚度可以达到0.60mm～3.00mm。As shown in Figure 2, the shape of the molded 3D curved lens is a rectangular arc surface, and the melting material used is PC. The final molded 3D curved lens is transparent, and the thickness can reach 0.60mm-3.00mm.
成型3D曲面镜片所需要的模具主要包括前模仁、后模仁、后模推块、流道以及进浇口，作为一种示意，如图1所示，前模仁和后模仁合模后形成的模腔1的形状与3D曲面镜片的形状相符，进浇口2的位置位于模腔的长度方向的中间位置，进浇口2为扇形，进浇口与模腔靠近的一侧的长度为模腔的长度的1/4～1/3，这样有利于产品成型的充填，尤其对薄、大、透明的产品效果更佳；流道3采用S型流道，在成型时利于产品的外观。在设计模具时，模仁经过镜面抛光处理为宜，模仁的尺寸公差控制在0.005mm～0.01mm为宜。模腔的圆跳动精度要求在±0.03mm为宜，针对大尺寸3D曲面镜片(长60mm～300mm，宽50mm～120mm)，在模具设计产品时，产品的尺寸每边都预留:1mm～3mm，后续压缩注塑成型后再通过CNC加工到要求尺寸；而对于小尺寸的3D曲面镜片(长1mm～60mm(不取60mm)，宽1mm～50mm(不取50mm))可以不需要做尺寸预留，直接压缩注塑成型产品的最终尺寸即可。The molds required to form 3D curved lenses mainly include front mold cores, rear mold cores, rear mold push blocks, runners, and gates. As an illustration, as shown in Figure 1, after the front mold core and rear mold core are closed The shape of the formed mold cavity 1 conforms to the shape of the 3D curved lens. The position of the gate 2 is located in the middle of the length direction of the cavity. The gate 2 is fan-shaped. The length of the side close to the gate and the cavity is It is 1/4~1/3 of the length of the mold cavity, which is beneficial to the filling of the product molding, especially for thin, large and transparent products; the runner 3 adopts an S-shaped runner, which is beneficial to the product’s smoothness during molding. Exterior. When designing the mould, it is advisable for the mold core to be mirror polished, and the size tolerance of the mold core should be controlled within 0.005mm to 0.01mm. The circular runout accuracy of the mold cavity should be ±0.03mm. For large-size 3D curved lenses (length 60mm-300mm, width 50mm-120mm), when designing the product, the size of the product should be reserved on each side: 1mm-3mm , followed by compression injection molding and then processed to the required size by CNC; and for small-sized 3D curved lenses (length 1mm ~ 60mm (not 60mm), width 1mm ~ 50mm (not 50mm)) do not need to make size reservations , directly compress the final size of the injection molded product.
压缩注塑成型以上的3D曲面镜片分为注塑与压缩两个阶段，在注塑熔料之前，模具为合模状态，此时的前模仁、后模仁预留有0.20mm的间隙。熔料由进浇口射入，当熔料填充模腔体积的40％时，从进浇口所在的一侧以及与该侧相对的另一侧同时向模腔中射入氮气，当充入氮气的体积为模腔体积的15％且熔料填充模腔体积的80％时，氮气从排气孔排出，模腔内部开始压缩，此时模腔中的熔料在后模推块的作用下取得产品的实际厚度及尺寸。压缩注塑成型的主要工艺参数：模具温度170℃，成型压力150MPa，熔体温度210℃，注射时间13s，延迟时间1s，压缩速度8mm/s，压缩力5t，压缩时间50s。The 3D curved lens above the compression injection molding is divided into two stages: injection molding and compression. Before the molten material is injected, the mold is in the mold closing state. At this time, a gap of 0.20mm is reserved between the front mold core and the rear mold core. The molten material is injected from the gate. When the molten material fills 40% of the cavity volume, inject nitrogen gas into the cavity from the side where the gate is located and the other side opposite to this side. When the volume of nitrogen is 15% of the cavity volume and the molten material fills 80% of the cavity volume, the nitrogen gas is discharged from the vent hole, and the inside of the cavity begins to compress. Get the actual thickness and size of the product below. The main process parameters of compression injection molding: mold temperature 170°C, molding pressure 150MPa, melt temperature 210°C, injection time 13s, delay time 1s, compression speed 8mm/s, compression force 5t, compression time 50s.
本实施例中成型后的3D曲面镜片通过可以外观增硬技术使产品硬度达到要求，增硬后的产品铅笔硬度可达到5H/1000g，最终所得的产品可以替代玻璃做3C产品的屏幕，后壳等零部件，可应用于高端智能手机和平板电脑、可穿戴式设备、仪表板及工业用电脑等领域。In this embodiment, the molded 3D curved lens can meet the requirements of product hardness through appearance hardening technology, and the pencil hardness of the hardened product can reach 5H/1000g, and the final product can replace glass as the screen and back shell of 3C products It can be used in high-end smartphones and tablet computers, wearable devices, dashboards and industrial computers.
3D曲面镜片除了为矩形弧面外，在其他实施例中还可以是圆形弧面、椭圆形弧面、多边形弧面等。In addition to the rectangular arc surface, the 3D curved lens can also be a circular arc surface, an elliptical arc surface, a polygon arc surface, etc. in other embodiments.
以上内容是结合具体的优选实施方式对本发明所作的进一步详细说明，不能认定本发明的具体实施只局限于这些说明。对于本发明所属技术领域的技术人员来说，在不脱离本发明构思的前提下，还可以做出若干等同替代或明显变型，而且性能或用途相同，都应当视为属于本发明的保护范围。The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art to which the present invention belongs, several equivalent substitutions or obvious modifications can be made without departing from the concept of the present invention, and those with the same performance or use should be deemed to belong to the protection scope of the present invention.
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