Method for the manufacture of a reinforced plastic product
A plastic product and reinforced technology, which is applied to the distribution method of liquid plastic on the reinforcement bag and in the reinforcement bag during the manufacturing process, and the vacuum-assisted resin injection molding process in the field of manufacturing products, which can solve the problem of taking a lot of time and so on.
Inactive Publication Date: 2006-08-23
轻型构造公司
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Problems solved by technology
Furthermore, applying the airtight cover (which is usually a flexible sheet) in the traditional way takes a lot of time in the manufacture of such larger articles, and the material of the cover can only be used once, which leads to more waste
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[0021] Figure 1a -d shows a part of the forming wall 1 of an outer or inner mold in which the corresponding product is produced. A reinforcement package 2 , for example a glass or carbon fiber mesh, has been placed against the profiled wall 1 . The reinforcement pack is then covered by an airtight cover 3 which should be airtight or airtight to the extent that the reinforcement pack 2 can be pumped by means of a pump system 11 connected to the opening 4 And the space between the airtight cover 3 and the profiled wall 1 is evacuated to a relatively low pressure d1 respectively. Inject liquid plastic 6 through a feed opening 5, for example a mixture of polyester resin and hardener, also referred to as synthetic resin below; due to the sufficient pressure d1 in the space between the molded wall 1 and the airtight cover 3 Low enough that the pressure d0 (eg normal external pressure or higher) can force the liquid plastic 6 into the space between the airtight cover 3 and the prof...
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A method for the manufacture of a plastic product, wherein a reinforcement package (2) is placed against a molding wall (1), an air extraction and a supply (5) for liquid plastic material (6) are installed, and the reinforcement package is covered by an air-tight covering (3), on which, non-detachably, channel parts (7) are fixed. The pressure in the reinforcement package is adjusted to a value d1, lower than the ambient pressure, after which the pressure within the channel parts is adjusted to a value d2, lower than d1, so that runner channels are formed on the reinforcement package. After the liquid plastic material has soaked the reinforcement package to a sufficient extent, the pressure in the channel parts is adjusted to a value d3, greater than d1, so that the runner channels are pushed away. After curing of the plastic material, the air-tight covering - if desired reusable and premodeled - and the channel parts connected therewith are released.
Description
technical field [0001] The invention relates to a method for manufacturing reinforced plastic products. In particular, the invention relates to the manner in which liquid plastic is dispensed on and within the reinforcement pack during the manufacturing process. More specifically, the present invention relates to the manufacture of articles using a process known as Vacuum Assisted Resin Injection Molding (VARI, abbreviated as Resin Injection Molding). This method includes the following steps: [0002] - placing a reinforcement pack, for example made of glass or carbon fiber mesh, against a forming wall, such as an outer or inner mold; [0003] - installation of feed ports for liquid plastics such as synthetic resins; [0004] - substantially air-tight or air-tight covering of the reinforcement pack, including the feed opening to which it is fitted, e.g. by means of a plastic sheet; [0005] - adjust the pressure in the space between the profiled wall and the airtight cover...
Claims
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IPC IPC(8): B29C70/54B29C70/44
CPCB29C70/443B29C70/548
Inventor 埃德温·科尔内卢斯·费利克斯·卡罗勒斯·范海尔普特
Owner 轻型构造公司