Method for controlling geometric dimension of rubber product of nuclear power plant through temperature gradient

A technology for rubber products and geometric dimensions is applied in the field of using temperature gradient to control the geometric dimensions of rubber products in nuclear power plants.

Active Publication Date: 2014-03-05
陕西特种橡胶制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The rubber cups currently used are imported products, and the outer diameter is made by secondary grinding. After grinding, the section (working surface) is rough, which is not conducive to sealing

Method used

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  • Method for controlling geometric dimension of rubber product of nuclear power plant through temperature gradient

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Step 1. Put 100kg of No. 1 smoked sheet glue, 5kg of zinc oxide, 1kg of stearic acid, 1kg of antiaging agent RD, 1kg of antiaging agent MB, 2kg of nano cerium oxide, 2kg of microcrystalline wax B10, 5kg of boron carbide, and 20kg of anthracene oil charcoal Black, 5kg dibutyl sebacate, 0.5kg accelerator TMTD, 1kg accelerator DM and 1.5kg vulcanizing agent DCP (dicumyl peroxide) are placed in the rubber mixer and mixed evenly;

[0024] Step 2. Follow the shape of the rubber cup (see figure 1 ) and size (outer diameter 837mm) to select a mold, preheat the mold at 105°C, and then fill the preheated mold with the uniformly mixed raw materials in step 1;

[0025] Step 3, place the mold filled with raw materials in step 2 in a flat vulcanizer, and carry out vulcanization treatment under the condition of a pressure of 11MPa, and obtain a nuclear power plant nuclear reactor steam generator blocking plate rubber cup after demoulding; the vulcanization treatment The temperature c...

Embodiment 2

[0028] Step 1. Put 100kg No.1 smoked sheet glue, 3kg zinc oxide, 2kg stearic acid, 0.5kg antiaging agent RD, 0.5kg antiaging agent MB, 3kg nano cerium dioxide, 1kg microcrystalline wax B10, 6kg boron carbide, 18kg anthracene oil Carbon black, 4kg dibutyl sebacate, 0.5kg accelerator TMTD, 0.5kg accelerator DM and 1kg vulcanizing agent DCP (dicumyl peroxide) were placed in the rubber mixer and mixed evenly;

[0029] Step 2. Follow the shape of the rubber cup (see figure 1 ) and size (outer diameter 837mm) to select a mold, preheat the mold at 110°C, and then fill the preheated mold with the raw materials mixed uniformly in step 1;

[0030] Step 3, place the mold filled with raw materials in step 2 in a flat vulcanizer, and carry out vulcanization treatment under the condition of a pressure of 12MPa, and obtain the rubber cup of the nuclear reactor steam generator blocking plate of the nuclear power plant after demoulding; the vulcanization treatment The temperature control proc...

Embodiment 3

[0033]Step 1. Put 100kg No. 1 smoked sheet glue, 5kg zinc oxide, 2kg stearic acid, 2kg antiaging agent RD, 1kg antiaging agent MB, 1kg nano cerium oxide, 3kg microcrystalline wax B10, 4kg boron carbide, 22kg anthracene oil charcoal Black, 6kg dibutyl sebacate, 1kg accelerator TMTD, 1kg accelerator DM and 2kg vulcanizing agent DCP (dicumyl peroxide) are placed in the rubber mixer and mixed evenly;

[0034] Step 2. Follow the shape of the rubber cup (see figure 1 ) and size (outer diameter 837mm) to select a mold, preheat the mold at 100°C, and then fill the preheated mold with the raw materials mixed uniformly in step 1;

[0035] Step 3, place the mold filled with raw materials in step 2 in a flat vulcanizer, and carry out vulcanization treatment under the condition of a pressure of 10MPa, and obtain the rubber cup of the nuclear power plant nuclear reactor steam generator blocking plate rubber cup after demoulding; the vulcanization treatment The temperature control process i...

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Abstract

The invention discloses a method for controlling the geometric dimension of a rubber product of a nuclear power plant through temperature gradient. The method comprises the following steps: (1) uniformly mixing raw materials in a rubber mixing mill; (2) preheating a selected mold at the temperature of 100 to 110 DEG C, and filling the uniformly-mixed raw materials into the preheated mold; (3) placing the mold filled with the raw materials in a flat vulcanizing machine, vulcanizing under the pressure of 10 to 12MPa, and performing de-molding to obtain the rubber product. According to the method, vulcanizing is carried out through the temperature gradient, so that a vulcanizing agent and an accelerant in the rubber product are fully decomposed in different temperature sections, the efficacy of aids in respective temperature sections is achieved, the phenomena of partial chain scission and instable shrinkage caused by vulcanizing of natural rubber macromolecules in a single high-temperature section are avoided, the tolerance of the prepared rubber product is stabilized to be smaller than 0.12 percent, and the dimensional accuracy is obviously higher than the national standard.

Description

technical field [0001] The invention belongs to the technical field of preparation of rubber products in nuclear power plants, and in particular relates to a method for controlling the geometric dimensions of rubber products in nuclear power plants by using temperature gradients. Background technique [0002] The vulcanization production process of rubber products can be generally understood as: "the process of changing a chain structure of high molecular polymer from a chain structure with no use value to a network structure with use value". This process is called "vulcanization". The vulcanization process involves three elements of "temperature, pressure, and time". [0003] The chain-to-network process requires vulcanization, and the vulcanization rate produced by pressure, temperature, and time during the vulcanization process is closely related to the vulcanizing agent and accelerator (catalyst) in the rubber formula. The vulcanization and promotion (catalysis) additi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C35/02B29B7/00C08L7/00C08K13/02C08K3/22C08K5/09C08K3/38C08K3/04C08K5/12
Inventor 苏有学黄潜张福海刘永生严巍峰任苹
Owner 陕西特种橡胶制品有限公司
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