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Domestic gas hose, processing process thereof and special-purposed production device thereof

A technology for gas hoses and production equipment, applied in the directions of hoses, mechanical equipment, pipes, etc., can solve the problems of insufficient material supply and normal production, and achieve the effect of ensuring smooth material supply

Inactive Publication Date: 2016-01-27
SUZHOU XINDISI GAS SEALING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is pre-crosslinked (semi-vulcanized) NBR in the mixture, which improves the temperature resistance of the mixture. At 120°C, the mixture is still in the form of loose powder. If it is added to the extruder at this time, it is easy to feed in the extruder. The mouth forms a "bridge" phenomenon, the supply of materials is insufficient, and normal production cannot be performed

Method used

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  • Domestic gas hose, processing process thereof and special-purposed production device thereof

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Experimental program
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Effect test

Embodiment 1

[0044] The invention provides a household gas hose, which consists of the following components in parts by weight:

[0045] NBR: 40;

[0046] PVC: 60;

[0047] Cross-linking agent: 0.6;

[0048] Stabilizer: 6;

[0049] Plasticizer: 30;

[0050] Reinforcing Filler: 40;

[0051] And it is mixed and extruded by the above-mentioned components. Under the distribution ratio of the components, the use performance and processing performance of the household gas hose are optimized.

Embodiment 2

[0053] A processing technology of the household gas hose of embodiment 1, comprising the steps of:

[0054] NBR preprocessing step A:

[0055] First, add a quantitative ratio of stabilizers, plasticizers and reinforcing fillers to NBR for mixing.

[0056] Add a crosslinking agent to the NBR after mixing for pre-crosslinking (semi-vulcanization),

[0057] Grinding the pre-crosslinked NBR into uniform small particles;

[0058] PVC pretreatment step B:

[0059] Add stabilizers, plasticizers, and reinforcing fillers in quantitative proportions to PVC, and knead and plasticize them in a high-speed mixer. At this time, the PVC mixture is in the form of loose powder;

[0060] The NBR particles pretreated in step A and the PVC plastic compound pretreated in step B are added to a high-speed mixer at a weight ratio of NBR:PVC of 40:60, mixed, preheated, and then extruded.

Embodiment 3

[0062] refer to figure 1, a special production equipment for household gas hoses based on Embodiment 2, including an extrusion cylinder 10, a hopper 11 arranged at the inlet end of the extrusion cylinder 10, a propeller 13 and a driving propeller 13 arranged in the hopper 11 The feeding motor 12, the extrusion screw 15 that is axially arranged in the extrusion cylinder 10, the extrusion motor 14 that is arranged at one end of the extrusion cylinder 10 and drives the extrusion screw 15, and the extrusion motor 14 that is arranged at the exit of the extrusion cylinder 10 Extrusion port 19 at the end.

[0063] Wherein, the outlet end of the extrusion barrel 10 is provided with a T-shaped head 18 with a trapezoidal extrusion channel, and the extrusion port 19 is located at the outlet end of the T-shaped head 18 at the end of the extrusion channel with a smaller radius.

[0064] Wherein, a heating tube 16 is arranged between the T-shaped head 18 and the extrusion barrel 10, the he...

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Abstract

The invention discloses a domestic gas hose composed of the following components, by weight: 35-45 parts of NBR, 50-65 parts of PVC, 0.3-0.8 parts of a crosslinking agent, 3-8 parts of a stabilizer, 20-40 parts of a plasticizer, and 30-50 parts of a reinforcing filler. According to the invention, NBR is subjected to mixing, pre-crosslinking and pulverizing, and is mixed with kneaded and plasticized PVC; and the mixture is preheated and is subjected to extrusion molding. The hose has the characteristics of good strength, good oil resistance, good elasticity and good low-temperature resistance of NBR, as well as the characteristics of good ozone resistance, good weather resistance, good flame retarding property and good tear resistance of PVC. The product has higher density, better performances such as strength and air tightness, and excellent comprehensive performances. The hose is especially suitable to be used in oil-resistant product exposed to air.

Description

technical field [0001] The invention relates to a household gas hose, its processing technology and special production equipment. Background technique [0002] Nitrile rubber (NBR) has excellent oil resistance and resilience, so oil-resistant and gas-resistant rubber products generally use nitrile rubber, but its ozone resistance and weather resistance are average. By modifying NBR with polyvinyl chloride (PVC), the ozone aging resistance and weather resistance of NBR materials can be greatly improved. Therefore, domestic gas hoses mainly use NBR, and NBR is modified by PVC. This method can greatly improve the ozone aging resistance and weather resistance of the product, thereby prolonging the service life of the product. [0003] When using PVC to modify NBR, generally the amount of NBR and PVC is not more than 30 / 70 when the ratio of NBR / PVC is not more than 30 / 70. However, due to the small amount of NBR and no cross-linking, it mainly reflects the performance of PVC. , ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L9/02F16L11/04B29C47/38B29C47/12B29C48/30B29C48/395
Inventor 王增华何斌邱林法
Owner SUZHOU XINDISI GAS SEALING MATERIAL
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