CN203635862U

CN203635862U - Gear-ring sand mold

Info

Publication number: CN203635862U
Application number: CN201320868724.9U
Authority: CN
Inventors: 王丹兵; 刘斌
Original assignee: QUANZHOU QUANYONG MACHINERY DEVELOPMENT Co Ltd
Current assignee: QUANZHOU QUANYONG MACHINERY DEVELOPMENT Co Ltd
Priority date: 2013-12-26
Filing date: 2013-12-26
Publication date: 2014-06-11
Anticipated expiration: 2023-12-26

Abstract

The utility model discloses a gear-ring sand mold. The gear-ring sand mold is characterized by comprising a molding box with a gear-ring mold cavity, wherein the molding box is formed by adopting molding sand; an inner hole is formed in the gear-ring mold cavity and is internally provided with risers; a runner gate and a direct gate are arranged between the risers; exhausting holes are formed in the edge of the gear-ring mold cavity. The gear-ring sand mold disclosed by the utility model has the advantages that by adoption of the technical scheme, the risers are arranged in the inner hole, and are not in direct contact with the mold cavity of a casting piece, so that the phenomena of shrinkage and tension cracking are unlikely to occur, and the quality of the casting piece is improved; due to redistribution of the whole casting channel, the casting and molding of the casting piece are stable and effective, so that the production efficiency is greatly improved.

Description

Gear ring sand mold

Technical field

The utility model belongs to sand casting field, relates to gear ring sand mold.

Background technology

Sand casting-produce in the sand mold casting method of foundry goods.Steel, iron and most of non-ferrous alloy casting all can obtain with sand mould casting method.Because the Modeling Material that sand casting is used is cheap and easy to get, Casting mold manufacturing is easy, and single-piece production to foundry goods, produce by batch and produce and all can adapt in a large number, for a long time, be the basic technology in Foundry Production always.

The material of manufacturing sand mold is called Modeling Material, practises passing through being called molding sand for the manufacture of the material of sand mold, is called core sand for the manufacture of the Modeling Material of core.Conventionally molding sand is to be mixed by a certain percentage by roughing sand (mountain sand or river sand), clay and water, and its medium clay soil is about 9%, and water is about 6%, and all the other are roughing sand.Sometimes also add on a small quantity if the additives such as coal dust, vegetable oil, wood chip are to improve the performance of molding sand and core sand.The quality of molding sand and core sand directly affects the quality of foundry goods, and the bad meeting of molding sand quality makes foundry goods produce the defects such as pore, sand holes, scab, burning into sand.

The foundry goods of what sand casting was used is the most popular and simple types has adopted several centuries.Sand casting is for manufacturing large component, as casting pig, and spheroidal graphite cast-iron, the sand casting of the operations such as stainless steel and other type steel.Wherein key step comprises drawing, mould, and coremaking, moulding, fusing and cast, clean etc.

Existing gear ring sand mold as shown in Figure 1, comprise the molding box that adopts molding sand to be formed with gear ring die cavity 10, the gear ring inner frieze position of gear ring die cavity 10 is provided with three rising heads 20, between rising head 20, be provided with three road runner gatees 30 and the down gate 40 of being located at three road runner gate 30 intersections, rising head 20 is located at the gear ring inner frieze position of gear ring die cavity 10, after casting, in contraction process, easily produce drawing crack herein, greatly affect the quality of foundry goods.

Utility model content

Main purpose of the present utility model is to provide gear ring sand mold, improves the quality of foundry goods.

The utility model adopts following technical scheme:

Gear ring sand mold, is characterized in that: comprise the molding box that adopts molding sand to be formed with gear ring die cavity, in described gear ring die cavity, be formed with endoporus, in described endoporus, be provided with rising head, be provided with runner gate and down gate between described rising head, the edge of described gear ring die cavity is provided with steam vent.

Preferably, described molding sand is resin sand.

Concrete, described rising head is two, is symmetrically set in described endoporus.

Preferably, described runner gate is V-shape, and described down gate is located at the corner of described runner gate.

Concrete, described rising head and described runner gate adopt wooden model moulding, and described gear ring die cavity and described down gate adopt aluminum dipping form moulding, and described steam vent adopts forming plastic pipe.

From above-mentioned to description of the present utility model, compared with prior art, the utility model is by adopting technique scheme, rising head is located at endoporus, does not directly contact with the die cavity of foundry goods, is difficult for producing shrinkage tear phenomenon, improve the quality of foundry goods, the redistribution of whole pouring channel, makes the casting of foundry goods and moulding more stable and efficient, has improved widely production efficiency.

Accompanying drawing explanation

Fig. 1 is the structural representation of existing gear ring sand mold in background technology.

Fig. 2 is the structural representation of the gear ring sand mold in the specific embodiment.

The specific embodiment

Below by the specific embodiment, the utility model will be further described.

Gear ring sand mold as shown in Figure 2, comprise the molding box that adopts molding sand to be formed with gear ring die cavity 50, molding sand is resin sand, in gear ring die cavity 50, be formed with endoporus 51, in endoporus 51, be provided with rising head 60, rising head 60 is two, be symmetrically set in endoporus 51, between rising head 60, be provided with runner gate 70 and down gate 80, runner gate 70 is V-shape, and down gate 80 is located at the corner of runner gate 70, the edge of gear ring die cavity 50 is provided with steam vent 90, rising head 60 and runner gate 70 adopt wooden model moulding, and gear ring die cavity 50 and down gate 80 adopt aluminum dipping form moulding, and steam vent 90 adopts forming plastic pipe.

Above are only a specific embodiment of the present utility model, but design concept of the present utility model is not limited to this, allly utilizes this design to carry out the change of unsubstantiality to the utility model, all should belong to the behavior of invading the utility model protection domain.

Claims

1. gear ring sand mold, it is characterized in that: comprise the molding box that adopts molding sand to be formed with gear ring die cavity, in described gear ring die cavity, be formed with endoporus, in described endoporus, be provided with rising head, between described rising head, be provided with runner gate and down gate, the edge of described gear ring die cavity is provided with steam vent.

2. gear ring sand mold according to claim 1, described molding sand is resin sand.

3. gear ring sand mold according to claim 1, described rising head is two, is symmetrically set in described endoporus.

4. gear ring sand mold according to claim 1, described runner gate is V-shape, described down gate is located at the corner of described runner gate.

5. gear ring sand mold according to claim 1, described rising head and described runner gate adopt wooden model moulding, and described gear ring die cavity and described down gate adopt aluminum dipping form moulding, and described steam vent adopts forming plastic pipe.