CN102490372B - Method for forming carbon fiber pipe and die thereof - Google Patents
Method for forming carbon fiber pipe and die thereof Download PDFInfo
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- CN102490372B CN102490372B CN201110412397.1A CN201110412397A CN102490372B CN 102490372 B CN102490372 B CN 102490372B CN 201110412397 A CN201110412397 A CN 201110412397A CN 102490372 B CN102490372 B CN 102490372B
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- 229920000049 Carbon (fiber) Polymers 0.000 title claims abstract description 93
- 239000004917 carbon fiber Substances 0.000 title claims abstract description 93
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 38
- 229920001971 elastomer Polymers 0.000 claims abstract description 32
- 229910052751 metal Inorganic materials 0.000 claims abstract description 31
- 239000002184 metal Substances 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 238000007711 solidification Methods 0.000 claims abstract description 7
- 230000008023 solidification Effects 0.000 claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims description 16
- 239000000853 adhesive Substances 0.000 claims description 8
- 230000001070 adhesive effect Effects 0.000 claims description 8
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 239000004945 silicone rubber Substances 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 17
- 239000002131 composite material Substances 0.000 abstract description 6
- 230000032798 delamination Effects 0.000 description 7
- 238000013461 design Methods 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910021383 artificial graphite Inorganic materials 0.000 description 1
- 238000010000 carbonizing Methods 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000000805 composite resin Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 235000011194 food seasoning agent Nutrition 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
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- Moulding By Coating Moulds (AREA)
Abstract
本发明涉及公开了一种碳纤维复合材料技术领域，公开了一种碳纤维管材的成型方法，包括以下步骤，芯模制备：制作用于包覆碳纤维单向预浸带的芯模，芯模包括金属芯棒和包覆金属芯棒的橡胶材料。铺覆碳纤维单向预浸带：芯模表面涂覆脱模剂后，将碳纤维单向预浸带按不同角度多层铺覆。合模：将已铺覆碳纤维预浸带的芯模定位放入阴模内，并合模、紧固。固化、冷却、脱模：将已合模的模具放入烘箱内，待固化后随炉冷却，然后脱模形成所需制件。本发明的碳纤维管材的成型方法具有工艺简单、生产效率高、制造成本低、产品壁厚均匀、质量稳定性好等优点。
The invention relates to the technical field of carbon fiber composite materials, and discloses a method for forming a carbon fiber pipe, which includes the following steps: core mold preparation: making a core mold for coating carbon fiber unidirectional prepreg tape, the core mold includes metal Mandrel and rubber material covering the metal mandrel. Laying carbon fiber unidirectional prepreg tape: After coating the release agent on the surface of the mandrel, lay carbon fiber unidirectional prepreg tape in multiple layers at different angles. Mold closing: Position the core mold covered with carbon fiber prepreg tape into the female mold, and close and fasten the mold. Solidification, cooling, demoulding: put the clamped mold into the oven, cool with the furnace after solidification, and then demould to form the required parts. The carbon fiber pipe forming method of the present invention has the advantages of simple process, high production efficiency, low production cost, uniform product wall thickness, good quality stability and the like.
Description
技术领域 technical field
本发明涉及碳纤维复合材料技术领域，尤其涉及一种碳纤维管材的成型方法及其模具。The invention relates to the technical field of carbon fiber composite materials, in particular to a method for forming a carbon fiber pipe and a mold thereof.
背景技术 Background technique
碳纤维是由有机纤维经碳化及石墨化处理而得到的微晶石墨材料。碳纤维的微观结构类似人造石墨，是乱层石墨结构。碳纤维是一种力学性能优异的新材料，碳纤维树脂复合材料抗拉强度一般都在3500Mpa以上，是钢的7～9倍，抗拉弹性模量为230-430Gpa。因此材料的强度与其密度之比可达到2000Mpa以上。Carbon fiber is a microcrystalline graphite material obtained by carbonizing and graphitizing organic fibers. The microstructure of carbon fiber is similar to artificial graphite, which is a turbostratic graphite structure. Carbon fiber is a new material with excellent mechanical properties. The tensile strength of carbon fiber resin composite materials is generally above 3500Mpa, which is 7 to 9 times that of steel, and the tensile elastic modulus is 230-430Gpa. Therefore, the ratio of the strength of the material to its density can reach more than 2000Mpa.
铝合金是工业应用较广泛的一类有色金属结构材料，其塑形高、抗腐蚀性能好，可制成各种管材、型材和板材。但是铝合金管材由于重量大、避震性差，应用在自行车架、摄影器材等对重量和抗震性能要求较高的场合中，容易对自行车性能、摄影效果等造成影响。随着碳纤维复合材料技术的不断开发与演进，碳纤维复合材料的管材由于具有重量轻、强度高、韧性佳、抗震性强等优点，而逐渐取代了铝合金管材且被市场接受。Aluminum alloy is a kind of non-ferrous metal structural material widely used in industry. It has high shaping and good corrosion resistance, and can be made into various pipes, profiles and plates. However, due to its heavy weight and poor shock absorption, aluminum alloy pipes are used in bicycle frames, photographic equipment and other occasions that require high weight and shock resistance, which will easily affect bicycle performance and photographic effects. With the continuous development and evolution of carbon fiber composite technology, carbon fiber composite pipes have gradually replaced aluminum alloy pipes and are accepted by the market due to their advantages such as light weight, high strength, good toughness, and strong shock resistance.
目前，市场上所使用的碳纤维管材在成型方法上，大多均采用金属芯棒上直接缠绕碳纤维单向预浸带，然后，将两半模靠压机或紧固螺栓合模加压、加热成型。该方法能够满足规则形状如圆形管材的制造。但是当所需制造的管材为不规则的管材时，如带凹槽，该方法存在的如下缺点：(1)合模困难，生产效率低；(2)成型压力受限，产品复合材料层易存在分层、气泡等缺陷致使产品质量不稳定，废品率高。At present, most of the carbon fiber pipes used in the market are formed by directly winding the carbon fiber unidirectional prepreg tape on the metal mandrel, and then the two halves of the mold are pressurized and heated by a press or fastening bolts. . The method can satisfy the manufacture of regular shapes such as circular pipes. But when the pipe to be manufactured is an irregular pipe, such as with grooves, this method has the following disadvantages: (1) Difficulty in mold clamping and low production efficiency; (2) The molding pressure is limited, and the composite material layer of the product is easy Defects such as delamination and air bubbles lead to unstable product quality and high scrap rate.
因此，本领域迫切需要研发一种合模简单、厚度均匀、质量稳定性好的碳纤维管材的成型方法。Therefore, there is an urgent need in this field to develop a method for forming carbon fiber pipes with simple mold clamping, uniform thickness, and good quality stability.
发明内容 Contents of the invention
本发明目的在于提供一种碳纤维管材的成型方法及其模具。本发明的碳纤维管材的成型方法，是由金属芯棒与受热膨胀橡胶材料制成的芯模包覆碳纤维预浸带后装模、合模、加热而成。该方法尤其适用于不规则管材的制造，具有工艺简单、生产效率高、制造成本低、产品壁厚均匀、质量稳定性好等优点，具有广泛的市场应用前景。The object of the present invention is to provide a method for forming a carbon fiber pipe and a mold thereof. The forming method of the carbon fiber pipe of the present invention is formed by covering the carbon fiber prepreg tape with a mandrel made of a metal mandrel and a heat-expandable rubber material, and then installing, clamping and heating the mold. The method is especially suitable for the manufacture of irregular pipes, and has the advantages of simple process, high production efficiency, low manufacturing cost, uniform product wall thickness, good quality stability, etc., and has broad market application prospects.
本发明的第一方面提供了一种碳纤维管材的成型方法，包括以下步骤：A first aspect of the present invention provides a method for forming a carbon fiber pipe, comprising the following steps:
芯模制备：制作用于包覆碳纤维单向预浸带的芯模，所述芯模包括金属芯棒和包覆金属芯棒的橡胶材料；Mandrel preparation: making a mandrel for wrapping the carbon fiber unidirectional prepreg tape, the mandrel includes a metal mandrel and a rubber material covering the metal mandrel;
铺覆碳纤维单向预浸带：芯模表面涂覆脱模剂后，将碳纤维单向预浸带按不同角度多层铺覆；Laying carbon fiber unidirectional prepreg tape: After coating the release agent on the surface of the mandrel, lay carbon fiber unidirectional prepreg tape in multiple layers at different angles;
合模：将已铺覆碳纤维预浸带的芯模定位放入阴模内，并合模、紧固；Mold closing: Position the core mold covered with carbon fiber prepreg tape into the female mold, and close and fasten the mold;
固化、冷却、脱模：将已合模的模具放入烘箱内，待固化后随炉冷却，然后脱模形成所需制件。Solidification, cooling, demoulding: put the clamped mold into the oven, cool with the furnace after solidification, and then demould to form the required parts.
在另一优选例中，所述制件为摄影三脚架。In another preferred example, the article is a photography tripod.
较优地，所述制件为具有防旋转凹槽的摄影三脚架。Preferably, the article is a photography tripod with an anti-rotation groove.
在另一优选例中，所述金属芯棒与所述橡胶之间采用胶粘剂粘贴牢固。In another preferred example, the metal mandrel and the rubber are fixed firmly with an adhesive.
较优地，所述胶粘剂为胶粘剂型号HX-P88-8或7011胶。Preferably, the adhesive is adhesive model HX-P88-8 or 7011 glue.
在另一优选例中，所述橡胶材料其硬度(A)为30～40，抗撕裂强度＞6KN/m-1，线型膨胀系数＞2400K-1×10-6，体积膨胀系数＞7500K-1×10-6。In another preferred example, the rubber material has a hardness (A) of 30-40, a tear resistance > 6KN/m -1 , a linear expansion coefficient > 2400K-1×10 -6 , and a volume expansion coefficient > 7500K -1×10 -6 .
较优地，所述橡胶材料为硅橡胶材料Preferably, the rubber material is a silicone rubber material
在另一优选例中，碳纤维单向预浸带的铺覆角度为-90度至90度。In another preferred example, the laying angle of the carbon fiber unidirectional prepreg tape is -90° to 90°.
较优地，所述碳纤维单向预浸带型号为T700SC-12K。Preferably, the model of the carbon fiber unidirectional prepreg tape is T700SC-12K.
在另一优选例中，碳纤维单向预浸带的铺覆层数为6～8层。In another preferred example, the number of laying layers of the carbon fiber unidirectional prepreg tape is 6-8 layers.
在另一优选例中，将多件已合模的模具放入烘箱内，同时进行固化。In another preferred embodiment, multiple closed molds are put into an oven to be cured at the same time.
在另一优选例中，随炉冷却温度小于等于60℃。In another preferred example, the furnace cooling temperature is less than or equal to 60°C.
在另一优选例中，所述芯模的轴向具有凹槽。In another preferred example, the core mold has a groove in the axial direction.
在另一优选例中，所述阴模为具有上模和下模的两半式，并设有所述芯模的轴向和周向定位装置。In another preferred example, the female mold is a two-half type with an upper mold and a lower mold, and is provided with axial and circumferential positioning devices for the core mold.
本发明的第二方面提供了一种碳纤维管材的成型模具，包括芯模和阴模，所述芯模由金属芯棒和橡胶材料制成；所述阴模为具有上模和下模的两半式，并设有所述芯模的轴向和周向定位装置。The second aspect of the present invention provides a molding die for carbon fiber pipes, including a core mold and a female mold, the core mold is made of a metal mandrel and a rubber material; the female mold is a two-piece mold with an upper mold and a lower mold Half type, and equipped with axial and circumferential positioning devices for the mandrel.
在另一优选例中，所述芯模的轴向具有凹槽。In another preferred example, the core mold has a groove in the axial direction.
本发明实施方式与现有技术相比，主要区别及其效果在于：本碳纤维管材的成型方法是由金属芯棒与受热膨胀橡胶材料制成的芯模铺覆碳纤维预浸带后合模、加热而成。产品成型时的压力由该种橡胶材料受热膨胀而提供，在成型过程中的压力大小可根据橡胶厚度而设计。金属芯棒包覆一层橡胶材料制成芯模，使产品合模更简单。制作出的制件表面光滑、无气泡，内部无疏松、分层现象，尺寸完全满足设计要求。该碳纤维管材的成型方法具有工艺简单、生产效率高、制造成本低、产品壁厚均匀、质量稳定性好等优点。Compared with the prior art, the embodiment of the present invention has the main difference and its effect in that: the forming method of the carbon fiber pipe is that a mandrel made of a metal mandrel and a heated expansion rubber material is covered with a carbon fiber prepreg tape, and then the mold is closed and heated. made. The pressure during product molding is provided by the thermal expansion of the rubber material, and the pressure during the molding process can be designed according to the thickness of the rubber. The metal mandrel is covered with a layer of rubber material to make the core mold, which makes the mold clamping easier. The surface of the produced parts is smooth, free of air bubbles, free of looseness and delamination inside, and the size fully meets the design requirements. The forming method of the carbon fiber pipe has the advantages of simple process, high production efficiency, low production cost, uniform product wall thickness, good quality stability and the like.
应理解，在本发明范围内中，本发明的上述各技术特征和在下文(如实施例)中具体描述的各技术特征之间都可以互相组合，从而构成新的或优选的技术方案。限于篇幅，在此不再一一累述。It should be understood that within the scope of the present invention, the above-mentioned technical features of the present invention and the technical features specifically described in the following (such as embodiments) can be combined with each other to form new or preferred technical solutions. Due to space limitations, we will not repeat them here.
附图说明 Description of drawings
图1是本发明第一实施方式的碳纤维管材的成型方法的流程示意图；Fig. 1 is a schematic flow chart of a forming method of a carbon fiber pipe according to a first embodiment of the present invention;
图2是本发明第二实施方式的碳纤维管材的成型模具的结构示意图。Fig. 2 is a schematic structural view of a molding die for a carbon fiber pipe according to a second embodiment of the present invention.
具体实施方式 Detailed ways
本发明人通过广泛而深入的研究，意外地发现，将金属芯棒与受热膨胀橡胶材料制成的芯模，铺覆碳纤维预浸带后合模、加热而制成碳纤维管材。在成型过程中的压力大小可根据橡胶厚度而设计，在降低了合模难度的同时又能够制备出表面光滑、无气泡，内部无疏松、无分层现象，尺寸完全满足设计要求的碳纤维管材。该方法解决了现有成型方法存在的合模困难、生产效率低、成型压力受限、质量不稳定、废品率高的问题。具有工艺简单、生产效率高、制造成本低、产品壁厚均匀、质量稳定性好等优点。在此基础上，发明人完成了本发明。Through extensive and in-depth research, the inventor unexpectedly found that a mandrel made of a metal mandrel and a heat-expandable rubber material is covered with a carbon fiber prepreg tape and then molded and heated to form a carbon fiber pipe. The pressure during the molding process can be designed according to the thickness of the rubber. While reducing the difficulty of mold clamping, it is possible to prepare carbon fiber pipes with smooth surface, no bubbles, no looseness and no delamination inside, and the size fully meets the design requirements. The method solves the problems of difficult mold clamping, low production efficiency, limited molding pressure, unstable quality and high reject rate existing in the existing molding method. It has the advantages of simple process, high production efficiency, low manufacturing cost, uniform product wall thickness, and good quality stability. On this basis, the inventors have completed the present invention.
术语the term
碳纤维单向预浸带Carbon fiber unidirectional prepreg tape
碳纤维单向预浸带是将碳纤维与环氧树脂通过热熔、热压工艺制成的复合物，是制造碳纤维制品的先驱材料。碳纤维复合材料具有高模量、高强度、耐高温、耐腐蚀、抗蠕变、导电、导热、热膨胀系数小等一系列优异性能，用其制造的构件或产品具有结构强度高、刚性好、重量轻等特点。Carbon fiber unidirectional prepreg tape is a compound made of carbon fiber and epoxy resin through hot-melt and hot-pressing processes. It is a pioneer material for manufacturing carbon fiber products. Carbon fiber composite materials have a series of excellent properties such as high modulus, high strength, high temperature resistance, corrosion resistance, creep resistance, electrical conductivity, thermal conductivity, and small thermal expansion coefficient. light features.
在以下的叙述中，为了使读者更好地理解本申请而提出了许多技术细节。但是，本领域的普通技术人员可以理解，即使没有这些技术细节和基于以下各实施方式的种种变化和修改，也可以实现本申请各权利要求所要求保护的技术方案。In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明的实施方式作进一步地详细描述。In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.
本发明第一实施方式涉及一种碳纤维管材的成型方法。图1是该碳纤维管材的成型方法的流程示意图，包括以下步骤：The first embodiment of the present invention relates to a method for forming a carbon fiber pipe. Fig. 1 is the schematic flow sheet of the molding method of this carbon fiber pipe, comprises the following steps:
芯模制备步骤101Mandrel Preparation Step 101
制作用于包覆碳纤维单向预浸带的芯模，所述芯模包括金属芯棒和包覆金属芯棒的橡胶材料。A mandrel for wrapping the carbon fiber unidirectional prepreg tape is manufactured, the mandrel includes a metal mandrel and a rubber material covering the metal mandrel.
优选地，所述金属芯棒与所述橡胶之间采用胶粘剂粘贴牢固。Preferably, an adhesive is used to stick firmly between the metal mandrel and the rubber.
所述胶粘剂可以选用：以硅橡胶材料为基体的专用胶粘剂。The adhesive can be selected: a special adhesive based on a silicone rubber material.
优选地，所述橡胶材料其硬度(A)为30～40，抗撕裂强度＞6KN/m-1，线型膨胀系数＞2400K-1×10-6，体积膨胀系数＞7500K-1×10-6。Preferably, the rubber material has a hardness (A) of 30 to 40, a tear resistance >6KN/m -1 , a linear expansion coefficient >2400K -1 ×10 -6 , and a volume expansion coefficient >7500K -1 ×10 -6 .
所述橡胶调料可以选用：硅橡胶材料COCA31-11。The rubber seasoning can be selected from: silicone rubber material COCA31-11.
优选地，所述芯模的轴向具有凹槽。Preferably, the core mold has grooves in the axial direction.
所述金属芯棒可以选用：不锈钢、45#钢棒。The metal mandrel can be selected from: stainless steel, 45# steel rod.
铺覆碳纤维单向预浸带步骤102Laying carbon fiber unidirectional prepreg tape step 102
芯模表面涂覆脱模剂后，将碳纤维单向预浸带按不同角度多层铺覆。After the mold release agent is coated on the surface of the mandrel, the carbon fiber unidirectional prepreg tape is laid in multiple layers at different angles.
优选地，碳纤维单向预浸带的铺覆层数为6-8层。Preferably, the number of laying layers of the carbon fiber unidirectional prepreg tape is 6-8 layers.
优选地，碳纤维单向预浸带各层可按-90度至90度铺覆。Preferably, each layer of the carbon fiber unidirectional prepreg tape can be laid at -90° to 90°.
合模步骤103Clamping step 103
将已铺覆碳纤维预浸带的芯模定位放入阴模内，并合模、紧固。Position the core mold covered with carbon fiber prepreg tape into the female mold, close the mold and fasten it.
优选地，阴模是一个两半式闭合模具，由上模和下模组成，并设有所述芯模的轴向和周向定位装置。Preferably, the female mold is a two-half closed mold consisting of an upper mold and a lower mold, and is provided with axial and circumferential positioning devices for the core mold.
本实施方式中，在上模和下模的工作表面涂覆脱模剂，并晾置；将已铺覆碳纤维单向预浸带的芯模对准阴模定位结构放入下模内，通过上下模定位销合模，并采用紧固件合模到位。In this embodiment, the release agent is coated on the working surfaces of the upper mold and the lower mold, and left to air; the core mold covered with carbon fiber unidirectional prepreg tape is aligned with the positioning structure of the female mold and put into the lower mold. The positioning pins of the upper and lower molds are clamped, and the fasteners are used to clamp the molds in place.
固化、冷却、脱模步骤104Solidification, cooling, demoulding step 104
将已合模的模具放入烘箱内，待固化后随炉冷却，然后脱模形成所需制件。Put the clamped mold into the oven, cool with the oven after curing, and then demould to form the required parts.
优选地，烘箱内可按需放入件模具同时进行固化，以提高效率，降低成本。Preferably, molds can be placed in the oven as needed and cured simultaneously to improve efficiency and reduce costs.
优选地，随炉冷却至60℃或60℃以下。Preferably, it is furnace cooled to 60°C or below.
本发明的第二实施方式涉及一种碳纤维管材的成型模具。图2是该碳纤维管材的成型模具的结构示意图。The second embodiment of the present invention relates to a molding die for a carbon fiber pipe. Fig. 2 is a structural schematic diagram of the molding die of the carbon fiber pipe.
该碳纤维管材的成型模具包括芯模和阴模，所述芯模由金属芯棒5和橡胶材料6制成；所述阴模为具有上模1和下模3的两半式，并设有所述芯模的轴向和周向定位装置。The molding die of this carbon fiber pipe comprises a mandrel and a female mold, and the mandrel is made of a metal mandrel 5 and a rubber material 6; Axial and circumferential positioning means for the mandrel.
芯模由金属芯棒5和橡胶材料6制成，芯模的轴向具有凹槽。阴模采用两半式闭合模具，由上模1和下模3组成。将碳纤维单向预浸带包覆在芯模表面，对准阴模定位装置放入下模3内，通过定位销2将上模合模与下模上，然后采用紧固件7紧固。经过固化、冷却后，对制件4进行脱模，完成所需制件4。The mandrel is made of metal mandrel 5 and rubber material 6, and the axial direction of mandrel has groove. The female mold adopts a two-half closed mold, which is composed of an upper mold 1 and a lower mold 3. Wrap the carbon fiber unidirectional prepreg tape on the surface of the mandrel, align the female mold positioning device and put it into the lower mold 3, use the positioning pin 2 to clamp the upper mold and the lower mold, and then fasten it with the fastener 7. After solidification and cooling, the workpiece 4 is demoulded to complete the required workpiece 4 .
本发明的优点：Advantages of the present invention:
(1)产品成型时的压力由橡胶材料受热膨胀而提供，在成型过程中的压力大小可根据橡胶厚度而设计。(1) The pressure when the product is formed is provided by the thermal expansion of the rubber material, and the pressure during the forming process can be designed according to the thickness of the rubber.
(2)金属芯棒包覆一层橡胶材料制成芯模，产品合模更简单。(2) The metal mandrel is covered with a layer of rubber material to make the mandrel, which makes the mold clamping easier.
(3)制作出的制件表面光滑、无气泡，内部无疏松、分层现象，尺寸完全满足设计要求。(3) The surface of the produced parts is smooth, free of air bubbles, free of looseness and delamination inside, and the size fully meets the design requirements.
(4)工艺简单、生产效率高、制造成本低、产品壁厚均匀、质量稳定性好。(4) The process is simple, the production efficiency is high, the manufacturing cost is low, the product wall thickness is uniform, and the quality stability is good.
实施例1Example 1
采用上述碳纤维管材成型方法制造外径为φ28mm，壁厚为1.5mm，长为280mm的带凹槽的摄影三脚架碳纤维脚管。制作金属芯棒直径为φ11，橡胶材料厚度为7mm的芯模。金属芯棒与橡胶采用以硅橡胶材料为基体的专用胶粘剂粘接牢固。裁剪T7000SC-12K碳纤维单向预浸带8层，从第1层至第8层各纤维角度分别为0°、45°、-45°、0°、15°、-15°、5°、-5°，将上述裁剪好的碳纤维单向预浸带各层按角度手工包覆于芯模上。将芯模对准阴模定位，并用螺栓紧固。将模具放入烘箱内，将碳纤维单向预浸带固化后，随炉冷却至60℃以下，脱模形成所需的摄影三脚架碳纤维脚管。Adopting the above-mentioned carbon fiber pipe forming method to manufacture an outer diameter of φ28mm, a wall thickness of 1.5mm, and a length of 280mm is a grooved carbon fiber foot tube of a photographic tripod. Make a mandrel with a metal mandrel diameter of φ11 and a rubber material thickness of 7mm. The metal mandrel and the rubber are firmly bonded with a special adhesive based on silicone rubber material. Cut 8 layers of T7000SC-12K carbon fiber unidirectional prepreg tape, and the fiber angles from the first layer to the eighth layer are 0°, 45°, -45°, 0°, 15°, -15°, 5°, - 5°, each layer of the cut carbon fiber unidirectional prepreg tape is manually wrapped on the mandrel according to the angle. Align the core mold with the female mold and fasten it with bolts. Put the mold into the oven, after the carbon fiber unidirectional prepreg tape is cured, it is cooled to below 60°C with the furnace, and the mold is demoulded to form the required carbon fiber legs of the photography tripod.
经检测，使用该碳纤维管材成型方法制备的摄影三脚架碳纤维脚管表面光滑、无气泡，内部无酥松、分层现象；尺寸完全满足设计要求。After testing, the carbon fiber leg tube of the photographic tripod prepared by the carbon fiber tube forming method has a smooth surface, no air bubbles, and no looseness or delamination inside; the size fully meets the design requirements.
实施例2Example 2
采用上述碳纤维管材成型方法制造摄影三脚架碳纤维脚管。与上述实施例1的主要区别在于，金属芯棒直径增加为φ11.5，橡胶材料厚度仍为7mm；碳纤维单向预浸带采用6层结构铺覆，从第1层至第6层各纤维铺覆角度分别为0°、45°、-45°、0°、5°、-5°，其它材料、工艺及参数不变，制成了摄影三脚架碳纤维脚管。经检测，该制件表面及内部质量与实施例1相同，即表面光滑、无气泡，内部无酥松、分层现象；同时，制件的纵向强度基本相等，但横向强度略有降低。The above-mentioned carbon fiber pipe forming method is used to manufacture the carbon fiber foot pipe of the photography tripod. The main difference from the above-mentioned Example 1 is that the diameter of the metal mandrel is increased to φ11.5, and the thickness of the rubber material is still 7mm; the carbon fiber unidirectional prepreg tape is paved with a 6-layer structure, and each fiber from the first layer to the sixth layer The cladding angles are 0°, 45°, -45°, 0°, 5°, -5°, and other materials, processes and parameters remain unchanged, and the carbon fiber legs of the photography tripod are made. After testing, the surface and internal quality of the workpiece are the same as in Example 1, that is, the surface is smooth, free of air bubbles, and there is no crispness or delamination inside; meanwhile, the longitudinal strength of the workpiece is basically equal, but the transverse strength is slightly reduced.
对比例comparative example
采用带凹槽的金属芯棒上直接缠绕碳纤维单向预浸带的方法制备上述带凹槽的摄影三脚架碳纤维脚管。裁剪T7000SC-12K碳纤维单向预浸带8层，从第1层至第8层各纤维角度分别为0°、45°、-45°、0°、15°、-15°、5°、-5°(与上述实施例1的铺覆角度相同)，将裁剪好的碳纤维单向预浸带各层按角度手工包覆于芯模上。将带有与该凹槽匹配的两半模靠压机或紧固螺栓合模加压、加热成型。The above-mentioned carbon fiber foot tube of a photographic tripod with grooves is prepared by directly winding a carbon fiber unidirectional prepreg tape on a metal mandrel with grooves. Cut 8 layers of T7000SC-12K carbon fiber unidirectional prepreg tape, and the fiber angles from the first layer to the eighth layer are 0°, 45°, -45°, 0°, 15°, -15°, 5°, - 5 ° (the same as the laying angle of the above-mentioned embodiment 1), each layer of the cut carbon fiber unidirectional prepreg tape is manually wrapped on the mandrel according to the angle. The two half molds with matching grooves are pressurized and heat-formed against a press or fastening bolts.
经检测，采用金属芯棒上直接缠绕碳纤维单向预浸带的方法制备的摄影三脚架碳纤维脚管材料层具有分层，碳纤维脚管表面具有气泡，产品质量不稳定，废品率为30％左右。After testing, the material layer of the carbon fiber leg tube of the photography tripod prepared by directly winding the carbon fiber unidirectional prepreg tape on the metal mandrel has delamination, the surface of the carbon fiber leg tube has air bubbles, the product quality is unstable, and the reject rate is about 30%.
在本发明提及的所有文献都在本申请中引用作为参考，就如同每一篇文献被单独引用作为参考那样。此外应理解，在阅读了本发明的上述讲授内容之后，本领域技术人员可以对本发明作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。All documents mentioned in this application are incorporated by reference in this application as if each were individually incorporated by reference. In addition, it should be understood that after reading the above teaching content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.
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