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Manufacturing method and device of transformer molding insulating components

A technology for forming molds and products, applied in textiles and papermaking, etc., can solve the problems of low production efficiency and high price, and achieve the effects of reduced production cost, high electrical strength and high density

Inactive Publication Date: 2014-01-29
郎旗
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the special-shaped parts need to be manually formed by the forming technician on the wet paper blank on the tire shape, the production efficiency is extremely low, and the product quality depends on the experience and skills of the forming technician, so its price is very expensive

Method used

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  • Manufacturing method and device of transformer molding insulating components
  • Manufacturing method and device of transformer molding insulating components
  • Manufacturing method and device of transformer molding insulating components

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: Make the lead angle ring for transformer, the initial pulp concentration is about 0.35%, see figure 1 , the upper mold of the forming mold is a rigid mold 1, and the lower mold is a flexible mold 2; the forming surface of the entire flexible mold 2 is completely covered by a flexible bladder 21 made of elastic material with a thickness of 3 to 5 mm, and the flexible bladder 21 is rigid below. The mold core 22, the two are installed on the flexible mold base 23, and the initial flexible bag 21 is close to the rigid mold core 22; the inner surface of the surrounding frame 3 is cylindrical, and the diameter is based on the enclosed area ≥ product weight / (upper and lower molds are relatively motion maximum stroke × initial pulp concentration) is selected; the drainage groove 14 on the forming surface of rigid mold 1 leads to the drainage channel top on the surrounding frame 3 and the drainage channel (not shown on the figure) on the rigid mold body, and the for...

Embodiment 2

[0026] Embodiment 2: Make the larger transformer body angle ring with inner diameter, see figure 2 , and the difference from Example 1 is that the flexible mold 2 (composed of the flexible bag 21, the mold core 22 and the flexible mold base 23) is a corresponding annular structure, and the dynamic sealing is always set in a diameter smaller than the inner diameter of the insulating angle ring. , a solid or hollow circular cylinder 4, the circular cylinder 4 and the surrounding frame 3 are fixedly connected under the flexible mold, when the rigid mold 1 and the surrounding frame 3 are fastened, the upper end surface of the circular cylinder 4 is just in line with the The rigid mold 1 is in contact.

Embodiment 3

[0027] Embodiment 3: make the lead angle ring with non-orthogonal structure, rigid mold 1 can be made into two lobe molds, see image 3 As shown, the movable mold half 12 is connected with the fixed mold half 11 through the translation device 13; initially, the translation device 13 pushes (pulls) the movable mold half 12 to the fixed mold half 11 and firmly combines with the fixed mold half 11 to form a rigid mold cavity ; After the rigid mold 1 and the flexible mold 2 are relatively moved to squeeze water and the flexible mold 2 is filled with pressure fluid to squeeze water, when the rigid mold 1 is separated from the surrounding frame 3, the wet blank of the product is separated from the rigid mold 1 by introducing compressed air At the same time, use the translation device 13 to quickly separate the movable mold half 12 from the fixed mold half 11, so that the Figure 4 The wet blank of the non-orthogonal shaped part 5 shown can be demolded smoothly. The parting surface ...

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Abstract

The invention provides a manufacturing method and device of transformer molding insulating components. According to the manufacturing method and device, a paper-pulp high-pressure molding method is applied, and paper pulp with the concentration being 0.3-3% is compressed into a thin-shell structure product with the thickness ranging from 1 millimeter to 6 millimeters and the density ranging from 0.6 gram / cubic centimeter to 1.3 grams / cubic centimeter in a mould. The mould comprises a rigid mould body 1, a flexible mould body 2 and an enclosing frame 3, wherein the rigid mould body 1 is composed of a drainage groove 14, a screen mesh 15, a mesh pressing plate 16 and the like, and the flexible mould body 2 is composed of a flexible bag 21, a mould core 22 and a flexible mould base 23; after relative movement of the rigid mould body 1 and the flexible mould body 2 is finished, the flexible bag 21 is filled with pressure fluid, and the flexible bag 21 expands and applies pressure to a surrounding paper fiber laminated layer with the high moisture content until the surrounding paper fiber laminated layer reaches the required water content and the required thickness. Cost of the transformer molding insulating components manufactured in the manufacturing method and through the manufacturing device is reduced greatly, and the transformer molding insulating components are high in density and accurate in size. The manufacturing method and device can also be used for manufacturing pallets and other thin-shell structure products formed by the paper pulp under high pressure.

Description

technical field [0001] The invention relates to a thin-shell structural product made of pulp, such as a transformer-molded insulator and the like, in particular to a manufacturing method and a device used for a transformer-molded insulator formed by high-pressure pulp molding. Background technique [0002] All kinds of shaped insulating parts made of insulating pulp in transformers need to be made out of thick flat wet paper blanks on the paper machine, and then made of wet paper blanks into structural parts, molded parts and special-shaped parts. Among them, the special-shaped parts need to be manually molded on the tire shape by a forming technician, so the production efficiency is extremely low, and the product quality depends on the experience and skills of the forming technician, so its price is very expensive. Contents of the invention [0003] In view of the current situation that the efficiency of the forming process of special-shaped parts and molded parts in the ...

Claims

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Application Information

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IPC IPC(8): D21J3/00
Inventor 郎旗
Owner 郎旗
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