WO2021237376A1 - Lft-d in-mold film coating process for building formwork - Google Patents

Lft-d in-mold film coating process for building formwork Download PDF

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Publication number
WO2021237376A1
WO2021237376A1 PCT/CN2020/091943 CN2020091943W WO2021237376A1 WO 2021237376 A1 WO2021237376 A1 WO 2021237376A1 CN 2020091943 W CN2020091943 W CN 2020091943W WO 2021237376 A1 WO2021237376 A1 WO 2021237376A1
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WO
WIPO (PCT)
Prior art keywords
mold
lft
coating process
mixed material
mirror
Prior art date
Application number
PCT/CN2020/091943
Other languages
French (fr)
Chinese (zh)
Inventor
陈丁垚
石志伟
Original Assignee
江苏莘翔机电股份有限公司
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Priority to PCT/CN2020/091943 priority Critical patent/WO2021237376A1/en
Publication of WO2021237376A1 publication Critical patent/WO2021237376A1/en

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Classifications

    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/04—Layered products comprising a layer of synthetic resin as impregnant, bonding, or embedding substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes

Definitions

  • the invention relates to the technical field of building template manufacturing, in particular to an LFT-D in-mold coating process for building templates.
  • LFT is the abbreviation of Long-Fiber Reinforce Thermoplastic in English, and the Chinese translation is long fiber reinforced thermoplastic or it is customarily called long fiber reinforced thermoplastic composite.
  • the LFT-D process mainly solves the current problem of composite material template glass fiber length and semi-finished product manufacturing. While enhancing the mechanical properties of composite material template, it greatly reduces production costs.
  • the LFT-D process is often used to make building templates, but the secondary molding process is used for the surface coating of the building template, that is, the building template is made and then coated. This process will cause poor molding and coating. Film bonding is not in place or there is a phenomenon of bubbles between the two, so we need to design a one-time molding process to make the building template and the film one-time molding.
  • the purpose of the present invention is to provide a LFT-D in-mold coating process for building templates, so that the surface of the composite building template is covered with mirror material and integrally formed, which improves work efficiency and improves the wear resistance and service life of the building template .
  • the present invention provides a LFT-D in-mold coating process for building templates, the steps are as follows:
  • the frame type press drives the mold to close and perform compression molding.
  • the temperature in the extrusion equipment in the S1 is 160°-240°.
  • the proportion of glass fiber in the S1 is 25%-30%.
  • the oven in the S2 is a tunnel oven, and the heating temperature of the mirror sheet is 85°-90°.
  • frame type presses in S3 and S4 are frame type hydraulic presses.
  • the temperature of the mold in the S4 is 40°-50°.
  • the pressure is maintained for 30-40S after compression molding.
  • the beneficial effects of the present invention are: the film coating process steps of the present invention are simple, the molding effect is good, polypropylene and glass fiber are used as raw materials, the mixed material is extruded by the LFT-D process, and the mirror material is dried and then enters together with the mixed material.
  • the press forms a mirror-covered building template through compression molding.
  • the mirror-covered building template has the advantages of wear resistance, prolonged service life and easy demoulding, which improves construction efficiency and reduces construction costs.
  • a LFT-D in-mold coating process for building templates is specifically disclosed, and the steps are as follows:
  • the frame hydraulic press drives the mold to close and perform compression molding.
  • the temperature of the mold is 45°, and the pressure is maintained for 35S after compression molding.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention relates to the technical field of building formwork manufacturing, and specifically discloses an LFT-D in-mold film coating process for a building formwork. The process comprises: using polypropylene and glass fibers as raw materials, and adding same to an extrusion device so as to extrude a mixed material; introducing a mirror sheet into an oven for heating and softening; installing a mold in a frame-type pressing machine, feeding the mixed material in a mold cavity, and then covering the softened mirror sheet above the mixed material in the mold cavity; and driving the mold to be closed by means of the frame-type pressing machine, and performing compression molding. The present invention has simple steps of film coating process and good molding effects. A mirror-covered building framework is formed by using polypropylene and glass fibers as raw materials, extruding the mixed material by means of an LFT-D process, and then the mirror material, after softened, entering the pressing machine together with the mixed material, and performing compression molding. The mirror-coated building framework has the advantages of being wear-resistant, prolonging the service life and being easy to demold, improves the construction efficiency, and reduces the construction cost.

Description

一种建筑模板的LFT-D模内覆膜工艺A LFT-D In-mold Laminating Process for Building Templates 技术领域Technical field
本发明涉及建筑模板制造技术领域，特别是涉及一种建筑模板的LFT-D模内覆膜工艺。The invention relates to the technical field of building template manufacturing, in particular to an LFT-D in-mold coating process for building templates.
背景技术Background technique
LFT是英文Long-Fiber ReinforceThermoplastic的简称，中文译为长纤维增强热塑性塑料或习惯称之为长纤维增强热塑性复合材料。LFT-D工艺主要解决目前复合材料模板玻纤长度问题及半成品制造问题，增强复合材料模板力学性能的同时，大大降低生产成本。现有技术中，常采用LFT-D工艺制作建筑模板，但是建筑模板表面覆膜的均采用二次成型工艺，就是将建筑模板制成后再进行覆膜，这种工艺会出现成型不良，覆膜粘合不到位或者两者中间存在气泡的现象，所以我们需要设计一种一次成型工艺，使建筑模板和覆膜一次成型。LFT is the abbreviation of Long-Fiber Reinforce Thermoplastic in English, and the Chinese translation is long fiber reinforced thermoplastic or it is customarily called long fiber reinforced thermoplastic composite. The LFT-D process mainly solves the current problem of composite material template glass fiber length and semi-finished product manufacturing. While enhancing the mechanical properties of composite material template, it greatly reduces production costs. In the prior art, the LFT-D process is often used to make building templates, but the secondary molding process is used for the surface coating of the building template, that is, the building template is made and then coated. This process will cause poor molding and coating. Film bonding is not in place or there is a phenomenon of bubbles between the two, so we need to design a one-time molding process to make the building template and the film one-time molding.
发明内容Summary of the invention
本发明目的是提供一种建筑模板的LFT-D模内覆膜工艺，使复合材料建筑模板的表面覆镜面材料，且一体成型，提高了工作效率，提高了建筑模板的耐磨性和使用寿命。The purpose of the present invention is to provide a LFT-D in-mold coating process for building templates, so that the surface of the composite building template is covered with mirror material and integrally formed, which improves work efficiency and improves the wear resistance and service life of the building template .
为解决上述技术问题，本发明提供了一种建筑模板的LFT-D模内覆膜工艺，步骤如下：In order to solve the above technical problems, the present invention provides a LFT-D in-mold coating process for building templates, the steps are as follows:
S1、将聚丙烯和玻璃纤维作为原材料加入到挤出设备中挤出混合材料；S1. Add polypropylene and glass fiber as raw materials to the extrusion equipment to extrude the mixed material;
S2、将镜面片材进入烘箱加热烘软；S2. Put the mirror sheet into the oven for heating and softening;
S3、将模具安装到框架式压机中，将混合材料放入模具型腔内，然后将烘软的镜面片材覆在模具型腔内混合材料的上方；S3. Install the mold in the frame type press, put the mixed material into the mold cavity, and then cover the softened mirror sheet on top of the mixed material in the mold cavity;
S4、框架式压机带动模具合模后进行模压成型。S4. The frame type press drives the mold to close and perform compression molding.
进一步地，所述S1中挤出设备中的温度为160°～240°。Further, the temperature in the extrusion equipment in the S1 is 160°-240°.
进一步地，所述S1中玻璃纤维的投放比例25％～30％。Further, the proportion of glass fiber in the S1 is 25%-30%.
进一步地，所述S2中烘箱为隧道式烘箱，镜面片材的加热温度为85°～90°。Further, the oven in the S2 is a tunnel oven, and the heating temperature of the mirror sheet is 85°-90°.
进一步地，所述S3和S4中框架式压机为框式液压机。Further, the frame type presses in S3 and S4 are frame type hydraulic presses.
进一步地，所述S4中模具的温度为40°～50°。Further, the temperature of the mold in the S4 is 40°-50°.
进一步地，所述S4中模压成型后保压30～40S。Further, in the S4, the pressure is maintained for 30-40S after compression molding.
本发明的有益效果是：本发明覆膜工艺步骤简单，成型效果好，以聚丙烯和玻纤为原料，利用LFT-D工艺挤出混合材料，再将镜面材料烘软后与混合材料一起进入压机通过模压成型出覆镜面的建筑模板，表面覆镜面的建筑模板具有耐磨、延长使用寿命和容易脱模等优点，提高了施工效率、降低了建筑成本。The beneficial effects of the present invention are: the film coating process steps of the present invention are simple, the molding effect is good, polypropylene and glass fiber are used as raw materials, the mixed material is extruded by the LFT-D process, and the mirror material is dried and then enters together with the mixed material. The press forms a mirror-covered building template through compression molding. The mirror-covered building template has the advantages of wear resistance, prolonged service life and easy demoulding, which improves construction efficiency and reduces construction costs.
具体实施方式Detailed ways
下面将结合本发明的说明书附图，对本发明实施例中的技术方案进行清楚、完整地描述。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the specification of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.
在本发明的具体实施例中，具体公开了一种建筑模板的LFT-D模内覆膜工艺，步骤如下：In the specific embodiment of the present invention, a LFT-D in-mold coating process for building templates is specifically disclosed, and the steps are as follows:
S1、将聚丙烯和玻璃纤维作为原材料加入到挤出设备中挤出混合材料，其中玻璃纤维的投放比例为25％，聚丙烯的投放比例为75％，挤出设备的温度为220°；S1. Add polypropylene and glass fiber as raw materials to the extrusion equipment to extrude the mixed material, where the glass fiber is added in a proportion of 25%, the polypropylene is in a proportion of 75%, and the temperature of the extrusion equipment is 220°;
S2、将镜面片材进入隧道式烘箱加热到90°将镜面片材烘软；S2. Put the mirror sheet into a tunnel oven and heat it to 90° to soften the mirror sheet;
S3、将模具安装到框式液压机中，将混合材料放入模具型腔内，然后将烘软的镜面片材覆在模具型腔内混合材料的上方；S3. Install the mold in the frame hydraulic press, put the mixed material into the mold cavity, and then cover the softened mirror sheet on the mixed material in the mold cavity;
S4、框式液压机带动模具合模后进行模压成型，模具的温度为45°，模压成型后保压35S。S4. The frame hydraulic press drives the mold to close and perform compression molding. The temperature of the mold is 45°, and the pressure is maintained for 35S after compression molding.
以上所揭露的仅为本发明的一种较佳实施例而已，当然不能以此来限定本发明之权利范围，因此依本发明权利要求所作的等同变化，仍属本发明所涵盖的范围。What is disclosed above is only a preferred embodiment of the present invention, which of course cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims (7)

  1. 一种建筑模板的LFT-D模内覆膜工艺，其特征在于，步骤如下：A LFT-D in-mold coating process for building templates, which is characterized in that the steps are as follows:
    S1、将聚丙烯和玻璃纤维作为原材料加入到挤出设备中挤出混合材料；S1. Add polypropylene and glass fiber as raw materials to the extrusion equipment to extrude the mixed material;
    S2、将镜面片材进入烘箱加热烘软；S2. Put the mirror sheet into the oven for heating and softening;
    S3、将模具安装到框架式压机中，将混合材料放入模具型腔内，然后将烘软的镜面片材覆在模具型腔内混合材料的上方；S3. Install the mold in the frame type press, put the mixed material into the mold cavity, and then cover the softened mirror sheet on top of the mixed material in the mold cavity;
    S4、框架式压机带动模具合模后进行模压成型。S4. The frame type press drives the mold to close and perform compression molding.
  2. 根据权利要求1所述的一种建筑模板的LFT-D模内覆膜工艺，其特征在于，所述S1中挤出设备中的温度为160°～240°。The LFT-D in-mold film coating process of a building template according to claim 1, wherein the temperature in the extrusion equipment in the S1 is 160°-240°.
  3. 根据权利要求1所述的一种建筑模板的LFT-D模内覆膜工艺，其特征在于，所述S1中玻璃纤维的投放比例25％～30％。The LFT-D in-mold coating process for building templates according to claim 1, wherein the proportion of glass fiber in the S1 is 25%-30%.
  4. 根据权利要求1所述的一种建筑模板的LFT-D模内覆膜工艺，其特征在于，所述S2中烘箱为隧道式烘箱，镜面片材的加热温度为85°～90°。The LFT-D in-mold coating process for building templates according to claim 1, wherein the oven in S2 is a tunnel oven, and the heating temperature of the mirror sheet is 85°-90°.
  5. 根据权利要求1所述的一种建筑模板的LFT-D模内覆膜工艺，其特征在于，所述S3和S4中框架式压机为框式液压机。The LFT-D in-mold coating process for building formwork according to claim 1, wherein the S3 and S4 middle frame type presses are frame type hydraulic presses.
  6. 根据权利要求1所述的一种建筑模板的LFT-D模内覆膜工艺，其特征在于，所述S4中模具的温度为40°～50°。The LFT-D in-mold coating process of a building template according to claim 1, wherein the temperature of the mold in the S4 is 40°-50°.
  7. 根据权利要求1所述的一种建筑模板的LFT-D模内覆膜工艺，其特征在于，所述S4中模压成型后保压30～40S。The LFT-D in-mold coating process of a building template according to claim 1, wherein the pressure is maintained for 30-40S after compression molding in the S4.
PCT/CN2020/091943 2020-05-23 2020-05-23 Lft-d in-mold film coating process for building formwork WO2021237376A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013117743A1 (en) * 2012-02-08 2013-08-15 Quadrant Plastic Composites Ag Sheetlike composite material
CN111038032A (en) * 2019-12-20 2020-04-21 江苏莘翔机电有限公司 LFT-D in-mold film coating process of building template
CN211729885U (en) * 2019-11-22 2020-10-23 上海伽材新材料科技有限公司 Forming die for foam core expansion forming interlayer composite material

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013117743A1 (en) * 2012-02-08 2013-08-15 Quadrant Plastic Composites Ag Sheetlike composite material
CN211729885U (en) * 2019-11-22 2020-10-23 上海伽材新材料科技有限公司 Forming die for foam core expansion forming interlayer composite material
CN111038032A (en) * 2019-12-20 2020-04-21 江苏莘翔机电有限公司 LFT-D in-mold film coating process of building template

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