WO2023109152A1 - Pièce moulée et procédé sans tissu de démoulage pour sa fabrication - Google Patents

Pièce moulée et procédé sans tissu de démoulage pour sa fabrication Download PDF

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Publication number
WO2023109152A1
WO2023109152A1 PCT/CN2022/110493 CN2022110493W WO2023109152A1 WO 2023109152 A1 WO2023109152 A1 WO 2023109152A1 CN 2022110493 W CN2022110493 W CN 2022110493W WO 2023109152 A1 WO2023109152 A1 WO 2023109152A1
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WO
WIPO (PCT)
Prior art keywords
release
mold
molded part
base material
yarns
Prior art date
Application number
PCT/CN2022/110493
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English (en)
Chinese (zh)
Inventor
张健侃
王运明
刘召军
李雪建
姜栋
权利军
章靓
周胜林
张俊雄
Original Assignee
振石集团华智研究院(浙江)有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202123172274.3U external-priority patent/CN216544805U/zh
Priority claimed from CN202111643254.1A external-priority patent/CN114347513B/zh
Application filed by 振石集团华智研究院(浙江)有限公司 filed Critical 振石集团华智研究院(浙江)有限公司
Publication of WO2023109152A1 publication Critical patent/WO2023109152A1/fr

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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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/36—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and impregnating by casting, e.g. vacuum casting

Definitions

  • the present disclosure relates to, but is not limited to, a molded part and a method for producing it without release cloth.
  • Pultruded board products of composite materials have been widely used in the production of wind energy blades because of their advantages such as strong mechanical properties and light weight.
  • Pultruded sheets are usually manufactured by laminating and laminating fiber materials and vacuum infusing resins, but it is not easy to demould the pultruded sheets after the resin is cured and formed.
  • the disclosure provides a molded part and a production method thereof without release cloth.
  • a first aspect of the present disclosure provides a molded product including a body including a base material and a plurality of mold release parts dispersed in the base material so that the surface of the body A substrate region and a plurality of release regions surrounded by the substrate region are formed, wherein the substrate region is formed by the surface of the substrate, and the release region is formed by the surface of the release portion.
  • the material of the base material includes a resin material
  • the release part is formed by reacting a release agent material with the resin material in the base material.
  • the plurality of demoulding areas are distributed on the surface of the body in a point shape or in a network shape.
  • the plurality of release areas occupy less than 30% of the surface of the body.
  • the mold forming part further includes a plurality of yarns threaded in the body.
  • the molded part is a composite pultruded sheet.
  • the second aspect of the present disclosure provides a method for producing molded parts without release cloth, characterized in that the production method comprises:
  • the structural parts in the mold are demolded to obtain the molded part.
  • At least placing the mixed material in a mold for molding includes:
  • the composite material and the plurality of yarns are placed in a mold for shaping.
  • the molding of the mixed material and the plurality of yarns in a mold includes:
  • the release agent material accounts for 1%-2% of the whole material.
  • the molded parts provided by the embodiments of the present disclosure use the base material and the demoulding part to jointly form the molded part body, and the demoulding part is scattered on the surface of the base material to ensure the interlayer bonding force between the molded parts body. While it can be demoulded normally, it will not affect the normal use of the molded parts. In the actual production process, the processing steps are reduced, the risk of use is reduced, and the quality of the molded parts is guaranteed. The pollution problem after the release cloth is removed is solved, and the manufacturing cost is greatly reduced.
  • Fig. 1 is a schematic structural view of a molded part shown according to an exemplary embodiment
  • Fig. 2 is a top view of a molded part shown according to an exemplary embodiment
  • Fig. 3 is a schematic cross-sectional view of a molded part shown according to an exemplary embodiment
  • Fig. 4 is a schematic structural view of a molded part shown according to an exemplary embodiment
  • Fig. 5 is a schematic structural view of a molded part shown according to an exemplary embodiment
  • Fig. 6 is a flow chart of a method for producing molded parts without release cloth according to an exemplary embodiment.
  • Pultruded sheet products have been widely used in the production of wind energy blades because of their advantages such as strong mechanical properties and light weight. Pultruded sheets are usually manufactured by laminating and laminating fiber materials and vacuum infusing resins, but it is not easy to demould the pultruded sheets after the resin is cured and formed. Therefore, in order to facilitate demoulding after the pultruded sheet is manufactured, a demoulding structure is usually covered on the surface of the pultruded sheet. Common release products include release cloth and release agent, and the release products are covered on the surface of the pultruded sheet to facilitate the rapid release of the formed pultruded sheet.
  • the present disclosure provides a molded part and its production method without a demoulding part.
  • the molded part adopts the combination of the base material and the demoulding part, which solves the problem that traditional demoulding products affect the yield of pultruded sheets , while ensuring the smoothness of the substrate surface, reducing the waste of resources and simplifying the processing steps.
  • the mold molding includes a body 1, the body 1 includes a base material 11 and a plurality of demoulding parts 12 dispersedly arranged in the base material 11, that is, a plurality of demoulding parts 12
  • the mold part 12 is doped in the base material 11, so, in the surface of the body 1 formed by the base material 11 and the mold release part 12, there are both the surface of the base material 11 and the surface of the mold release part 12, as shown in Figure 2
  • the surface of the body 1 forms a substrate region 111 and a plurality of release regions 112 surrounded by the substrate region 111, wherein the substrate region 111 is formed by the surface of the substrate 11, and the release region 112 is formed by the release portion 12 surface formations.
  • the release part 12 is scattered in the base material 11 and surrounded by the base material 11, so that the surface of the body 1 includes both the surface of the base material 11 and the surface of the release part 12. On the one hand, it is dispersed on the surface of the body 1
  • the surface of the demoulding part 12 can ensure the surface smoothness of the molded parts, thereby facilitating the demoulding of the molded parts. On the other hand, it also ensures the yield of the molded parts and saves resources. Because the amount of the added release agent is small, it does not have other harmful reactions with other materials in the molded part, thus ensuring the yield of the molded part.
  • the processing process is simplified, and it is not necessary to add a release cloth during the processing, and to remove the release cloth from the finished product later.
  • the molded part mentioned in the present disclosure refers to a structural part that is processed by a mold and needs to be demoulded after the processing is completed.
  • the material of the base material 11 includes a resin material
  • the release part 12 is formed by reacting the release agent material with the resin material in the base material 11 .
  • the mold release parts 12 are usually distributed in an irregular state in the base material 11 , and their distribution areas are relatively scattered, and there will be no large-area aggregation. Its shape can be spherical, ellipsoidal, dot-like, flake-like, block-like, etc., and is not specifically limited here.
  • the release agent material is combined with the resin material, and part of the release part 12 will migrate to the surface of the molded part as shown in FIG. 2 during the use of the molded part.
  • the outer contour shape of the mold release part 12 on the surface of the substrate 11 includes a circle, an ellipse, a triangle, a quadrangle and/or a star.
  • the mold release part 12 is evenly arranged on the surface of the substrate in a star shape, and in more applications, the mold release part 12 can also be fixed on the substrate in the above-mentioned various forms, such as circular, Ellipse, triangle, quadrangle, etc. are not specifically limited here.
  • the cross-sectional shape of the mold release part 12 includes triangular, square, and/or arcuate.
  • the cross-sectional shape of the demoulding part 12 may be square, and in practical applications, the cross-section of the demoulding part 12 may also often present a triangular or arcuate shape.
  • the release part 12 is mainly composed of a release agent. Referring to FIG. 3 , the release agent material reacts with the resin material to form a release portion 12 on the surface of the substrate.
  • connecting branches are formed between the mold release part 12 and the base material 11.
  • these connecting branches can be formed by the reaction of a release agent material and a resin material. distribution, so that the base material 11 can fix the entire periphery of the demoulding part 12 through a plurality of connecting branches, that is, the demoulding part 12 has a plurality of fastening points in the circumferential direction, and the connecting branches have a certain degree of stability, thus to a certain extent
  • the migration of the demoulding part 12 is limited above, and the problem of a large amount of migration of the demoulding part 12 will not occur during the use of the molded part, thereby ensuring the product quality of the molded part.
  • a plurality of demoulding areas 112 are distributed on the surface of the main body 1 in a dot shape or in a network shape.
  • the plurality of mold release regions 112 can be arranged in an array on the surface of the substrate 11 , or, the distance between at least some of the mold release regions 112 in the plurality of mold release regions 112 is not equal.
  • a plurality of demoulding areas 112 are arranged in a certain array on the surface of the substrate, the array can be a regular array as shown in Figure 1, or a plurality of demoulding areas 112 in a cluster Shapes and blocks are arranged in an array on the surface of the substrate 11, and the spacing between the multiple release areas 112 in the formed regular array is equal.
  • the plurality of release areas or at least part of the release areas are not equally spaced and not arranged in a regular array.
  • the release area 112 is distributed on the surface of the main body 1 in the form of dots or nets. The distribution of the release area 112 under this structure is relatively wide, which greatly reduces the influence on the surface smoothness of the substrate 11 .
  • the body 1 further includes a connecting portion 13 connecting adjacent demoulding portions 12 .
  • the connection part 13 connects each adjacent mold release part 12 and is jointly arranged on the surface of the base material 11 .
  • each connecting portion 13 and a plurality of demoulding portions 12 form a network structure.
  • the connecting part 13 connects the adjacent demoulding parts 12 to form a network structure, and is arranged on the surface of the base material 11, which can expand the setting range of the base material 11 and further optimize the demoulding process.
  • the plurality of release regions 112 occupy less than 30% of the surface of the body.
  • the surface roughness of the substrate 11 is less than or equal to 2 ⁇ m.
  • the mold release area 112 is disposed on the surface of the substrate 11 in the illustrated structure, resulting in a probability of the mold release area 112 being disposed on the surface area of the substrate 11 less than 30%. Due to this arrangement of the demoulding area 112, rapid demoulding can be achieved without affecting the quality of the molded part.
  • the surface roughness of the molded part is less than or equal to 2 microns, and the surface of the substrate 11 is provided with a release area 112 , because the roughness is less than or equal to 2 microns, so the molded part has extremely high smoothness.
  • the mold forming part further includes a plurality of yarns passing through the body 1 .
  • the multiple yarns include carbon fiber, glass fiber, and under certain circumstances, the multiple yarns also include basalt fiber.
  • a single yarn can be selected for the yarn, and yarns of various materials can also be mixed, which is not specifically limited here.
  • an indefinite number of carbon fiber yarns are selected for arranging the molded part, and the indefinite number of carbon fiber yarns are arranged in parallel at fixed intervals, or arranged in other ways, such as crossing.
  • the molded parts are mixed with carbon fiber yarns and glass fiber yarns and arranged in parallel at fixed intervals, or arranged in a crossing manner.
  • the molded parts are mixed with basalt fiber yarn and glass fiber yarn and arranged in parallel at fixed intervals, or arranged in a cross manner.
  • the specific yarn selection is determined according to the actual situation. After arranging multiple yarns, they are mixed with the base material, and the molded parts mixed with yarns have stronger structural connectivity and stronger force resistance. Therefore, in this example, the fiber yarns of the above-mentioned materials are selected for line arrangement to ensure the structural strength of the molded part.
  • the molded part is a composite pultruded board.
  • the composite pultruded board in this embodiment is jointly made of multiple yarns, resin and release agent.
  • a variable number of carbon fibers, glass fibers and basalt fibers are arranged in a preset way, and the arranged yarns are mixed with resin and release agent to form a composite pultruded board in the mold.
  • the preset method refers to single use of any one of carbon fiber, glass fiber and basalt fiber for arrangement, or a combination of carbon fiber, glass fiber and basalt fiber for arrangement.
  • the base material 11 may also be strip-shaped or block-shaped in practical applications.
  • the base material 11 includes a thermosetting resin plate and a plurality of yarns threaded in the resin plate.
  • the multiple yarns include carbon fiber, glass fiber, and under certain circumstances, the multiple yarns also include basalt fiber.
  • the base material 11 can be made of thermosetting resin to form the base material 11 into a resin board.
  • the yarns passing through the resin board can be made of carbon fiber, glass fiber, basalt fiber, etc.
  • the yarns in the resin board can be selected from a single type of yarn, and yarns of various materials can also be mixed, which is not specifically limited here.
  • the mold release parts 12 among the plurality of mold release parts 12, at least some of the mold release parts 12 have different thicknesses.
  • the thickness of the mold release part 12 is the vertical distance from the highest point on the top surface of the mold release part 12 to the connection point with the base material 11 .
  • the mold release part 12 fixedly connected to the base material 11 can be provided on the surface of the base material 11 with different thicknesses.
  • a method for producing a molded part without a release cloth is also provided.
  • the normal demoulding of the structural part can be realized without using a release cloth.
  • Fig. 4 shows the flow chart of the production method without release cloth of this mold molding, and as shown in Fig. 6, this production method comprises the steps:
  • the base material and the release agent material are mixed to obtain a mixed material.
  • the substrate material can be a thermosetting resin
  • the release agent material can be a silane release agent
  • the above thermosetting resin and the silane release agent are mixed to form a mixed material, which is a subsequent operation step Prepare materials.
  • S200 At least placing the mixed material in a mold for molding.
  • the mixed material is placed in the mold, and the mold is heated or cooled to make the liquid mixed material solidified in the mold. Since the mixed material is made of thermosetting resin and silane release agent Mixing according to the preset ratio, the surface roughness of the thermosetting resin after curing is less than or equal to 2 microns, so the surface smoothness of the molded part is the highest, preparing for the subsequent rapid demoulding.
  • the structural parts in the mold are demoulded to obtain molded parts. Due to the characteristics of the mixed material, the surface roughness of the mold after curing is less than or equal to 2 microns, showing a smooth surface, so that the mold after curing can be quickly demoulded to form molded parts.
  • the step of rapid demoulding can be completed without a demoulding part, and it is not necessary to add a demoulding cloth during the production process. Therefore, the release cloth is not needed in the production process of the molded part provided by the present disclosure, and the substrate material and the release agent material are mixed and then placed in the mold for curing and molding operations.
  • the molded parts made by this method do not use the release cloth, which solves the problem that the pultruded sheet will form a rough surface after the release cloth is removed, and the pultruded sheet with a rough surface needs to be improved according to the actual application.
  • the problem of smoothness treatment reduces processing steps and saves resources.
  • the mold release part 12 is made of a release agent material
  • the base material 11 is made of a base material
  • a structure as shown in FIG. 3 is formed when the molded part is cured, wherein the release agent material is mixed in the base material.
  • the release agent material will gradually migrate to the surface of the substrate 11 to form a structure as shown in FIG. 2 , that is, the release agent material can be regularly or irregularly arranged on the surface of the substrate 11 .
  • this migration process does not affect the quality of the molded part, nor does it affect other structures, fibers, etc.
  • step S200 at least the mixed material is placed in a mold for molding.
  • the mixed material is mixed with a plurality of yarns and placed in a mold, and solidified and formed in the mold to form a solid shaped moldings.
  • the molded part is a structure in which a plurality of yarns are mixed with a mixed material and then cured. Multiple yarns can be arranged with carbon fiber, glass fiber and basalt fiber according to a single type or a mixture of multiple types of yarns.
  • the resin can be thermosetting resin, etc., and mixed with the release agent material, and the mixed resin and release agent are poured into the mold together with the arranged yarns to be cured and shaped together. The cured molded parts can be demolded quickly to form finished products.
  • At least placing the mixed material in a mold for molding includes: placing the mixed material and a plurality of yarns in a mold for molding.
  • the mixed material includes resin and release agent.
  • the release agent can be a silane release agent. This type of release agent can be poured into the mold after being mixed with a thermosetting resin, and together with multiple yarns in the mold Curing and forming. Referring to Figure 3, the release agent is mixed with a thermosetting resin to form a mixed material, and then mixed with a plurality of yarns and placed in a mold for curing and molding.
  • the release agent is mixed with the thermosetting resin, the surface of the molded part is smooth and complete, and the release agent will not adhere to the surface of the molded part in a large area, which saves the processing work of the molded part in the later stage and does not need to be used again Release cloth, saving resources.
  • placing the mixed material and a plurality of yarns in a mold for molding includes: dipping a plurality of yarns into the mixed material, so that the mixed material wraps each yarn; Multiple yarns of mixed material are placed in a mold for shaping. The mixed material completely wraps the multiple yarns, so that the mixed material can evenly and completely cover the multiple yarns, and then it is placed in the mold for curing and setting, which enhances the structural strength of the molded part.
  • multiple yarns are first drawn, and after the multiple yarns pass through multiple yarn drawing devices, the tension of the yarns is increased, and the tension of the multiple yarns is increased.
  • the yarn can better maintain the distance between the yarns, realize a more uniform combination with the mixed material, and prevent the surface of the mixture from protruding or sinking, so that the texture of the molded part after post-processing is more uniform.
  • multiple yarns enter the mold and then mix with the mixed material.
  • the mixed material is evenly and completely covered with each yarn, and then The mixture mixed with the mixed material is introduced into the heating and curing device.
  • the cured molded parts are uniform in texture and smooth in surface and can be quickly demolded. After demoulding, the molded parts can be cut or other operations according to actual use requirements. Therefore, the molded part formed based on the method is solid, stable in structure, light in weight, and suitable for various applications.
  • the proportion of the release agent material to the whole material is 1%-2%.
  • the molded parts made of this ratio, the base material and the release agent material are mixed as shown in Figure 3, which greatly reduces the use ratio of the release agent, reduces the cost, and ensures that the quality of the molded parts is not affected.
  • the effect of release agent It can also ensure a high yield rate of molded parts, high demoulding efficiency, high quality of the finished product itself, and high safety during use.
  • the molded part of the present disclosure greatly reduces the manufacturing cost due to the removal of the release cloth material and avoiding the addition of excessive release agent material. Moreover, when the use of the above materials is reduced, the problem of environmental pollution caused by the waste materials generated during the processing can be solved. Finally, while solving the above-mentioned problems, the molded part of the present disclosure also ensures the interlayer bonding force between the molded parts, and ensures its quality and use effect.
  • the molded parts provided by the embodiments of the present disclosure use the base material and the demoulding part to jointly form the molded part body, and the demoulding parts are scattered on the surface of the base material to ensure the interlayer bonding force between the molded parts body. While it can be demoulded normally, it will not affect the normal use of the molded parts. In the actual production process, the processing steps are reduced, the risk of use is reduced, and the quality of the molded parts is guaranteed. The pollution problem after the release cloth is removed is solved, and the manufacturing cost is greatly reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

L'invention concerne une pièce moulée et un procédé sans tissu de démoulage pour la production de cette dernière. La pièce moulée comprend un corps (1), le corps (1) comprenant un matériau de base (11), et une pluralité de parties de démoulage (12), qui sont dispersées dans le matériau de base (11), de telle sorte qu'une région de matériau de base (111), et une pluralité de régions de démoulage (112), qui sont entourées par la région de matériau de base (111), sont formées au niveau d'une surface du corps (1). La région de matériau de base (111) est formée par une surface du matériau de base (11), et les régions de démoulage (112) sont formées par des surfaces des parties de démoulage (12). La pièce moulée est produite sans tissu de démoulage, de telle sorte que la force de liaison intercouche de la pièce moulée peut être assurée tout en obtenant un démoulage pratique et rapide, répondant ainsi aux exigences d'utilisation réelles.
PCT/CN2022/110493 2021-12-15 2022-08-05 Pièce moulée et procédé sans tissu de démoulage pour sa fabrication WO2023109152A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202123172274.3U CN216544805U (zh) 2021-12-15 2021-12-15 一种模具成型件
CN202123172274.3 2021-12-15
CN202111643254.1A CN114347513B (zh) 2021-12-29 2021-12-29 一种模具成型件及其无脱模布生产方法
CN202111643254.1 2021-12-29

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WO2023109152A1 true WO2023109152A1 (fr) 2023-06-22

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108908968A (zh) * 2018-07-06 2018-11-30 江苏海川新材料科技有限公司 一种采用乙烯基酯树脂制备的碳纤维复合材料制造工艺
CN110126309A (zh) * 2019-06-21 2019-08-16 南京聚发新材料有限公司 一种纤维增强复合材料拉挤成型装置及其拉挤成型工艺
WO2019188020A1 (fr) * 2018-03-27 2019-10-03 東レ株式会社 Agent de démoulage interne pour matériau composite renforcé par des fibres, matériau composite renforcé par des fibres, procédé de moulage associé et procédé d'assemblage pour produit moulé en résine renforcé par des fibres
CN111655766A (zh) * 2018-01-31 2020-09-11 东丽株式会社 纤维增强成型品及其制造方法
CN114347513A (zh) * 2021-12-29 2022-04-15 振石集团华智研究院(浙江)有限公司 一种模具成型件及其无脱模布生产方法
CN216544805U (zh) * 2021-12-15 2022-05-17 振石集团华智研究院(浙江)有限公司 一种模具成型件

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111655766A (zh) * 2018-01-31 2020-09-11 东丽株式会社 纤维增强成型品及其制造方法
WO2019188020A1 (fr) * 2018-03-27 2019-10-03 東レ株式会社 Agent de démoulage interne pour matériau composite renforcé par des fibres, matériau composite renforcé par des fibres, procédé de moulage associé et procédé d'assemblage pour produit moulé en résine renforcé par des fibres
CN108908968A (zh) * 2018-07-06 2018-11-30 江苏海川新材料科技有限公司 一种采用乙烯基酯树脂制备的碳纤维复合材料制造工艺
CN110126309A (zh) * 2019-06-21 2019-08-16 南京聚发新材料有限公司 一种纤维增强复合材料拉挤成型装置及其拉挤成型工艺
CN216544805U (zh) * 2021-12-15 2022-05-17 振石集团华智研究院(浙江)有限公司 一种模具成型件
CN114347513A (zh) * 2021-12-29 2022-04-15 振石集团华智研究院(浙江)有限公司 一种模具成型件及其无脱模布生产方法

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