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RTM forming process for hollow composite material products and forming mold used in RTM forming process

A composite material and molding process technology, applied in the field of RTM product molding, can solve the problems of difficult extraction, difficult extraction of the mandrel, and difficulty in controlling the expansion of the silicone mandrel, and achieve the effect of reducing production costs and operational difficulties

Inactive Publication Date: 2015-12-16
TEN TECH COMPOSITE TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, steel or silicone mandrels cannot be used to make too complicated pipe fittings, otherwise it is difficult to extract the mandrel, and the product fiber volume content is low; waxy mandrels can be used to make complex pipe fittings, but it is difficult to improve composite materials. The volum

Method used

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  • RTM forming process for hollow composite material products and forming mold used in RTM forming process
  • RTM forming process for hollow composite material products and forming mold used in RTM forming process
  • RTM forming process for hollow composite material products and forming mold used in RTM forming process

Examples

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Example Embodiment

[0032] Example one:

[0033] This embodiment provides an RTM molding process of a hollow composite product and a molding die used in the process. Such as figure 1 As shown, the forming mold includes an upper mold 1 and a lower mold 2, and also includes an elastic hollow cavity 3 provided between the upper mold 1 and the lower mold 2, and the hollow cavity 3 is provided with a pressure fluid inflow and Outlet fluid port. In this embodiment, one fluid port may be provided through which pressurized fluid flows into and out of the inner cavity of the hollow cavity, or at least two fluid ports may be provided, and the pressurized fluid flows into and out of the hollow cavity through different fluid ports. . It is easy to understand that the mold of this embodiment is provided with a resin injection port and a resin discharge port. In addition, when preparing tubular products, preferably, both ends of the hollow cavity 3 protrude from the upper mold 1 and the lower mold 2.

[0034] T...

Example Embodiment

[0047] Embodiment two:

[0048] This embodiment provides an RTM molding process of a hollow composite product and a molding die used in the process. The structure of the forming mold is the same as that in the first embodiment, including an upper mold 1 and a lower mold 2, and a hollow cavity 3 arranged between the upper mold 1 and the lower mold 2. The hollow cavity 3 is provided with a pressure supply The fluid port where fluid flows in and out.

[0049] The RTM molding process of the hollow composite product in this embodiment is basically the same as that in the first embodiment, including steps A to G. The difference lies in: image 3 As shown, in step G of the RTM molding process of the hollow composite product in this embodiment, the pressure of the hollow cavity is continuously increased to a third preset pressure to cure the resin, and the third preset pressure is greater than the second preset pressure. In the curing stage, further increasing the pressure in the hollow...

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Abstract

The invention discloses a RTM forming process for hollow composite material products and a forming mold used in the RTM forming process, which belong to the technical field of RTM product forming and are designed for solving the problem that pipe-shaped products which are complex in structure and high in content of fibers are difficult to produce by adopting the existing RTM forming process. According to the RTM forming process for the hollow composite material products, an elastic hollow cavity is used for supporting a space occupied by the hollow composite material products in the mold; the hollow cavity is filled with a pressure fluid and then can swell along with inner shapes of an upper mold and a lower mold, so that the hollow products which are complex in structure can be formed; meanwhile, the hollow cavity can be taken out easily, so that the production cost and the operation difficulty are reduced; more importantly, as gradual stage pressure is adopted in the hollow cavity, the hollow composite material products which are complex in structure and high in content of the fibers are produced. The invention also provides the forming mold used in the TM forming process for the hollow composite material products.

Description

technical field [0001] The invention relates to the technical field of RTM product molding, in particular to an RTM molding process and a molding die for hollow composite material products. Background technique [0002] At present, when resin transfer molding (RTM) is used to form fiber-reinforced plastic hollow products, such as tubular products, a certain force is required to prop up a preset space. The common methods used in production now are: adopt steel mandrel to support space, adopt silicon rubber mandrel to support space, adopt wax mandrel to support space. [0003] However, steel or silicone mandrels cannot be used to make too complicated pipe fittings, otherwise it is difficult to extract the mandrel, and the product fiber volume content is low; waxy mandrels can be used to make complex pipe fittings, but it is difficult to improve composite materials. The volume content of medium fiber requires waxy mandrel to have good shape and hardness retention at molding te...

Claims

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Application Information

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IPC IPC(8): B29C70/48B29C70/54B29C33/40
CPCB29C70/48B29C33/405B29C70/54
Inventor 陈锦松
Owner TEN TECH COMPOSITE TECH CORP
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