Integrated mould pressing die for glass fibre reinforced plastic centrifugal blower blade wheel and its method
A centrifugal fan and fiberglass technology, applied in the field of molding molds, can solve the problems of tangential damage to the fan, impeller rupture, danger, etc., and achieve the effect of improving production efficiency and overall strength
Inactive Publication Date: 2004-12-15
王维东
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Problems solved by technology
Since this kind of fan needs to rotate at high speed during use, if the connection between the front disc 1, blade 3 and rear disc 2 is not firm, not only will the impeller break during the rotation, which will cause danger, and the dynamic balance cannot be guaranteed. , so there are often accidents of damage to the fan caused by vibration such as shaft cutting
In recent years, some fan manufacturers also stick a thin layer of blades 3 on the back plate 2 first, then install a manual mold and then thicken and press molding, and finally glue the front plate 1 to the reserved glass cloth on the blades 3. Then the fan is produced by fastening and pressing with bolts. Although the blades 3 and the front disc 1 can be bonded together, the overall strength of the impeller cannot be guaranteed.
And do not see any integral molding die and method thereof of this fiberglass centrifugal fan impeller at present
Method used
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[0021] Such as Figure 4 As shown, the overall molding mold of the FRP centrifugal fan impeller provided by the present invention comprises common upper and lower molds and 10 mandrels between the blades, and the mandrel is a lower movable block 10 whose bottom surface is in contact with the chassis 2; The upper left side of the movable block 10 and the bottom surface is connected with the upper left end surface of the lower movable block 10 and the upper left movable block 11 whose side is connected with the outer arc surface of the blade 3; The upper right end face of the blade 3 joins and forms with the upper right movable block 12 that the side surface that does not contact with the upper left movable block 11 directly faces another blade 3 inner side. The joints of the bottom surfaces of the upper left movable block 11 and the upper right movable block 12 respectively protrude downward along the radial direction of the chassis 2 to form a flange 13 and 14 with a positioni...
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The mold includes upper mold, lower mold and ten core molds, each of which consists of lower block with bottom contacting with the underplate, top left block with bottom connected to the lower block and one side connected to the outer arced surface of one blade and top right block with bottom connected to the lower block and one side connected to the inner straight surface of one other blade. The mold for integrated molding of centrifugal blower GRP blade wheel has blade core mold separated into three connected blocks for easy demolding, and this results in high blade wheel strength, high production efficiency, and long blower life.
Description
technical field [0001] The invention relates to a molding die for a fiberglass centrifugal fan impeller and a method thereof, in particular to an integral molding mold for a fiberglass centrifugal fan impeller and a method thereof. Background technique [0002] The currently commonly used FB-4-72-11 FRP centrifugal fan is made by changing the steel plate material to FRP on the basis of the 4-72-11 centrifugal fan. This fan is characterized by corrosion resistance, light weight, low power consumption and long service life. figure 1 It is a schematic diagram of the side structure of the impeller of the fiberglass centrifugal fan in the prior art. figure 2 for figure 1 Middle A-A sectional view. image 3 for figure 1 The three-dimensional structure diagram of the blade in . Such as Figure 1 to Figure 3 As shown, this prior art fiberglass centrifugal fan impeller mainly includes a front disk 1, a rear disk 2 and 10 airfoil-shaped blades 3. The 10 airfoil-shaped blades 3 ...
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IPC IPC(8): B29C43/04B29C43/42
Inventor 王维东
Owner 王维东