CN202910282U

CN202910282U - Novel centrifugation roller core-filling pouring pipe

Info

Publication number: CN202910282U
Application number: CN 201220547532
Authority: CN
Inventors: 刘建朝; 袁乃博
Original assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Current assignee: Sinosteel Xingtai Machinery and Mill Roll Co Ltd
Priority date: 2012-10-24
Filing date: 2012-10-24
Publication date: 2013-05-01
Anticipated expiration: 2022-10-24

Abstract

The utility model discloses a novel centrifugation roller core-filling pouring pipe. The total length of the pouring pipe is smaller than or equal to 450mm, and a though hole which is used for molten iron flowing is formed in the poring pipe. The through hole is a two-stage step straight hole. The diameter of a first step hole is smaller than that of a second step hole. The uneven thickness of an outer-layer blank caused by molten iron scattered flow scouring the outer-layer blank of a roller is avoided, and the qualified rate of the thickness difference is improved from previous less than 70% to more than 85%. Through reducing the length of the poring pipe, under the premise that the normal manufacture requirement is guaranteed to meet, the weight of the pouring pipe is reduced, the production cost is reduced, the preparing time is reduced, an the production efficiency is improved by more than 70%.

Description

The novel centrifugal roll is filled out the core gate spool

Technical field

The utility model relates to the employed process unit in a kind of centrifugal casting technique field, specifically a kind of core employed gate spool of when cast of filling out.

Background technology

In casting technique was produced, roll was a kind of foundry goods that not only need bear larger load but also need surface abrasion resistance.Centrifugal casting is the main production of present roll.Produce in the technique of roll blank in centrifugal casting, widely used is horizontal centrifugal casting machine.Utilize first the outer blank of centrifugal action cast roll in the production process at horizontal centrifugal casting machine, take off casting mold from centrifugal casting machine after the cooling, place the rising head case at casting mold, fill out core gate spool and depositing funnel by being arranged on the separately flange assembly and connection of periphery, molten iron obtains the solid roller strand by placing the depositing funnel cast core of the roll on the rising head case.

It is that a segment length is the hollow tube of 700mm～1200mm that the more general centrifugal roller of present application is filled out the core gate spool, and gate spool one end is connected with depositing funnel, and the other end is introduced in the roll die cavity.The refractory cement layer need to be made in gate spool inside before using.Because gate spool is longer, be difficult to guarantee perpendicularity in the casting process, molten iron falls apart easily in the exit of gate spool and spatters, when the core molten iron enters the roll die cavity by gate spool, cause the core molten iron after entering the roll die cavity, to wash away the outer blank of roll, cause the skin of the roll blank thickness uneven, the mass defects such as slag inclusion, oxidation appear in the binder course of outer blank and core, affect the bond quality of skin of the roll and core, bring potential risks to product quality, even products waste.Because gate spool length surpasses 700mm, weight surpasses 40kg simultaneously, and operating difficulties when manually making, the refractory cement of gate spool inside need the dry time long, generally needs could use after dry 3 days, and inefficiency affects manufacturing schedule.

The utility model content

The utility model technical issues that need to address provide a kind of roll and fill out core employed flow speed stability of when cast, prevent the molten iron diffusing, guarantee the gate spool of constant product quality.

For solving the problems of the technologies described above, the technical solution adopted in the utility model is:

The novel centrifugal roll is filled out the core gate spool, and described gate spool is provided with the through hole that passes through for molten iron, and described through hole is secondary ladder straight hole, and the first shoulder hole diameter is less than the second ladder bore dia.

Further improvement of the utility model is: described gate spool overall length is less than or equal to 450mm.

Because the technological progress of having adopted technique scheme, the utility model to obtain is:

The utility model is provided with first, second grade shoulder hole that molten iron is flowed through successively, the second shoulder hole can alleviate effectively that molten iron is loose to be spattered and diffusing, make molten iron to middle polymerization, flow speed stability, and then guaranteed that the outer field blank of molten iron breaker roll washes away evenly, the skin of the roll blank thickness is even, constant product quality.

The gate spool overall length is less than or equal to 450mm, greatly shortened the length of running gate system, guaranteed the perpendicularity of gate spool, so that the core molten iron can vertically flow into the roll die cavity when flowing out gate spool, avoid molten iron to flow to the generation angular deviation and directly wash away to the skin of the roll blank, cause outer blank thickness uneven.Guaranteeing to satisfy the weight that has alleviated gate spool under the prerequisite of normal Production requirement, reduced production cost.Adopt the assembling of this kind gate spool simple, easy disassembly has reduced time, and production efficiency improves more than 70%, and the thickness difference qualification rate is brought up to more than 85% by former less than 70%.

Description of drawings

Fig. 1 is the cutaway view of the utility model structure;

Wherein: 1, the first shoulder hole, the 2, second shoulder hole, 3, gate spool.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in further details:

The overall length that centrifugal roller is filled out the core gate spool in the utility model is less than or equal to 450mm.Gate spool 3 is provided with when cast through hole of passing through of molten iron, structure as shown in Figure 1, through hole is secondary ladder straight hole, wherein the diameter of the first shoulder hole 1 is less than the diameter of the second shoulder hole 2.

Specific works situation of the present utility model is as follows:

Before gate spool 3 uses, need to make certain thickness refractory cement layer at the through-hole inner surface of gate spool 3 first, after the oven dry of refractory cement layer, in gate spool 3 peripheries ring flange is set, the flangeseal end face is concordant with the first shoulder hole place end face of gate spool 3, the ring flange of the ring flange of gate spool 3 periphery settings and the setting of depositing funnel port of export periphery is bolted, and what form centrifugal roller fills out the core running gate system.In the casting process, molten iron flows into gate spool 3 by depositing funnel, when flowing out the first shoulder hole 1 place of gate spool 3, diffusing appears in molten iron easily, because the diameter of the first shoulder hole 1 is less than the diameter of the second shoulder hole 2, this moment, the molten iron of diffusing can be flushed in the second shoulder hole hole wall, after being stopped by the second shoulder hole hole wall, molten iron continues vertically to flow downward, and flows out gate spool 3 by the second shoulder hole 2.

When the molten iron by gate spool 3 entered the roll die cavity, flow speed stability, molten iron were without the diffusing phenomenon, and the outer field blank of breaker roll washes away evenly, and the skin of the roll blank thickness is even, and the bonding layer quality of outer blank and core is stable.

The utility model is applicable to barrel diameter and is less than or equal to 1100 horizontal centrifugal roller, can further extend to all horizontal centrifugal rollers.

Claims

1. the novel centrifugal roll is filled out the core gate spool, and described gate spool (3) is provided with the through hole that passes through for molten iron, it is characterized in that: described through hole is secondary ladder straight hole, and the first shoulder hole (1) diameter is less than the second shoulder hole (2) diameter.

2. novel centrifugal roll according to claim 1 is filled out the core gate spool, it is characterized in that: described gate spool (3) overall length is less than or equal to 450mm.