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Floating bed crosslinking furnace for peroxide crosslinking polyethylene pipe preparing

A technology of cross-linked polyethylene and peroxide, applied in the field of plastic machinery, can solve problems such as fire hazards, easy aging of tube billets, and complex structure of large-diameter pipes, and achieve the effect of simple structure

Pending Publication Date: 2019-02-19
ZHEJIANG MENRED COMFORT SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is that in the existing crosslinking furnace, the tube blank is easy to age during the crosslinking process of the tube blank, causing fire hazards and complex structures when preparing large-diameter pipes.

Method used

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  • Floating bed crosslinking furnace for peroxide crosslinking polyethylene pipe preparing
  • Floating bed crosslinking furnace for peroxide crosslinking polyethylene pipe preparing

Examples

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Effect test

Embodiment 1

[0049] This embodiment provides a floating bed crosslinking furnace for the preparation of peroxide crosslinked polyethylene pipes, such as figure 1 and figure 2 As shown, it includes a floating bed body 1 , an air supply mechanism and an air flow regulating valve 4 .

[0050] Among them, the floating bed body 1 has a first inner cavity 11 for the pipe blank 15 to pass through and extends along the axis of the extruder tube head, and several air injection ports 2 and one air outlet 3 communicated with the first inner cavity 11 . A gas supply mechanism is connected with all gas injection ports 2, and the gas supply mechanism delivers inert hot gas to the first inner cavity 11, and the air flow regulating valve 4 is arranged on the gas supply mechanism, which is used to adjust the flow of the gas supply mechanism to the first inner cavity 11. The flow rate or flow rate of the inert hot gas is delivered inside, so that the hot inert gas in the first inner cavity 11 surrounds a...

Embodiment 2

[0073] This embodiment provides a preparation system for plastic pipes, including the floating bed crosslinking furnace for the preparation of peroxide crosslinked polyethylene pipes described in any one of Embodiment 1; The outlet is set in communication with the inlet of the first inner cavity 11 of the floating bed body 1; the sizing mechanism is set in communication with the outlet of the first inner cavity 11 of the floating bed body 1, and is used for the cross-linked tube blank 15 diameter sizing.

[0074] The annular outlet of the pipe head is connected to the first inner cavity, and the tube blank enters the first inner cavity directly after being extruded from the tube head, which can ensure continuous production; the tube blank enters after cross-linking in the first inner cavity The sizing mechanism then performs sizing to avoid the problem that the existing stretching sizing will generate a large internal stress parallel to the pipe axis in the pipe wall, reduce t...

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Abstract

The invention provides a floating bed crosslinking furnace for peroxide crosslinking polyethylene pipe preparing. A floating bed body provided with a first inner cavity, a plurality of gas spraying ports and at least one gas outlet, at least one gas supply mechanism for conveying inert hot gas into the first inner cavity, and an adjusting component are included, wherein the adjusting component isused for adjusting the flow speed or flow of the inert hot gas conveyed into the first inner cavity through the gas supply mechanism, and accordingly the hot inert gas in the first inner cavity surrounds and supports a pipe blank to suspend in the first inner cavity, and the axis of the pipe blank and the axis of a pipe machine head of an extruder are located on the same straight line. The pipe blank suspends in the inert gas, crosslinking is finished, resistance is small, and meanwhile the pipe blank thermo-oxidative aging possibility and the fire disaster risk are reduced. The pipe blank isflat and can adapt to manufacturing of peroxide crosslinking polyethylene pipes different in caliber. The crosslinking path is changed by changing the length of the floating bed body and the temperature of the inert gas, the crosslinking time is controlled, and the floating bed structure is simple.

Description

technical field [0001] The invention relates to the technical field of plastic machinery, in particular to a floating bed crosslinking furnace for preparing peroxide crosslinked polyethylene pipes. Background technique [0002] In the prior art, peroxide-crosslinked polyethylene requires a crosslinking reaction to prepare polymer pipes, and its industrial production methods mainly include simultaneous crosslinking and post-crosslinking. Among them, the synchronous cross-linking method is the process of completing the cross-linking process at the same time during the melting, plasticizing and molding process of the material; the post-cross-linking method is that the material is first melted, plasticized and formed, and then the cross-linking process is completed, that is, the material is extruded In the machine, it is firstly extruded into a tube blank, and then the tube blank is cross-linked. [0003] For example, Chinese patent document CN102139538A discloses a method for ...

Claims

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Application Information

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IPC IPC(8): B29C48/09B29C48/14B29C48/91B29C48/90B29C48/885
Inventor 于东明徐俊正段凯歌胡明远程志倪佳
Owner ZHEJIANG MENRED COMFORT SYST
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