CN205732916U - A kind of low pressure casting indirect water-cooling mould of improvement - Google Patents

Abstract

The utility model discloses the low pressure casting indirect water-cooling mould of a kind of improvement, including bed die (1), cooling water block (3), copper backing (5) and heat dam (6), arrange between copper backing (5) and bed die (1) with type heat dam (6), at bed die (1), heat dam (6) deep for 2mm is set on the contact surface of cooling water block (3).Heat dam distribution on bed die is determined by window width, and its width is unified with window width.Depending on heat dam quantity is by wheel number of windows.This utility model scheme simple possible, can make the strong water cooling region of annular be controlled, it is to avoid the region transitions cooling the coldest to need not water-cooled, reduces casting shrink defects and surface defect, improves qualified casting.

Description

A kind of low pressure casting indirect water-cooling mould of improvement

Technical field

This utility model relates to low pressure casting water cooling mould for aluminum wheels field.

Background technology

Low pressure casting water cooling mould generally uses water annulus to cool down mould.Water-cooling structure typically has two kinds, one be Water channel is processed, water flowing cooling mould after stifled weldering enclosed flume in mould；Another kind is to use separate water block, makes water channel thereon After, utilize strong heat-conducting medium separate water block is bolted to connection with bed die together with water cooling mold structure.Due to cold But the difference of mode, the former is direct water-cooling, and the latter is then indirect water-cooling.

All there is a common problem in two kinds of water-cooling patterns.When in casting process open water annulus cooling after, can to Cool in the mould annular region of water channel contact.The root thermal center of bcad seats and spoke connecting portion and cover tire ring support in addition The window's position for example, after opening for the annular water-cooled solved at spoke root thermal center, simultaneously can external bcad seats The window's position be also carried out cooling.Owing to water cooling mold bulk temperature is relatively low, produce the temperature of China and foreign countries' bcad seats the window's position continuously Degree itself is relatively low, and the most excessive cooling can break the thermal balance of mould, causes feeding a casting difficulty to produce casting flaw.Separately Outward, the window's position has been at again under relatively low mold temperature in filling and solidification processess, it is easy to produce at cast(ing) surface The raw defect such as misrun, cold shut reduces qualified casting further.

Summary of the invention

This utility model is for the weak point of indirect water-cooling mould, it is provided that the low pressure casting indirect water-cooling mould of a kind of improvement Tool, this mould can be prevented effectively from casting flaw and casting surface defect improves qualified casting.

This technical scheme is: the low pressure casting indirect water-cooling mould of a kind of improvement, including bed die, cooling water block, copper backing And heat dam.Arrange between copper backing and bed die with type heat dam, reach to control the purpose of cooled region, it is to avoid cooling water block The window's position by copper backing cooling bcad seats.At bed die, the deep heat dam of 2mm is set on cooling water block contact surface.Heat insulation Groove distribution on bed die is determined by window width, and its width is unified with window width.Heat dam quantity is by wheel Depending on number of windows.

This utility model scheme simple possible, can make the strong water cooling region of annular be controlled, it is to avoid to need not water The coldest cold region transitions cooling, reduces casting shrink defects and surface defect, improves qualified casting.

Accompanying drawing explanation

Fig. 1 is the assembly drawing of die of background technology.

Fig. 2 is assembly drawing of die of the present utility model.

Fig. 3 is schematic top plan view of the present utility model.

1. bed die in figure, 2. bolt, 3. cooling water block, 4. water annulus, 5. copper backing, 6. heat dam.

Detailed description of the invention

The utility model is described in further detail below in conjunction with the accompanying drawings:

As shown in Figure 2, the low pressure casting indirect water-cooling mould of a kind of improvement, including bed die 1, cooling water block 3, copper backing 5 and heat dam 6.For realizing controlling the purpose of cooled region, it is to avoid cooling water block 3 passes through copper backing 5 and cools down the window of bcad seats Position, is arranged with type heat dam 6 between copper backing 5 and bed die 1.It is implemented on the contact surface of bed die 1 and cooling water block 3, milling Process heat dam 6 deep for 2mm.

As shown in Figure 3, the heat dam 6 distribution on bed die is determined by window width, its width and window width Unified.Depending on heat dam 6 quantity is by wheel number of windows, this case heat dam 6 quantity is 9.When water annulus 4 starts During cooling, the cooling water block 3 that spoke root thermal center heat is contacted with copper backing 5 by bed die 1 is taken away.Due to depositing of heat dam 6 , this cooling procedure can be avoided external bcad seats the window's position cool down, thus reduce casting shrink defects and surface defect, Improve qualified casting.

Claims (1)

1. the low pressure casting indirect water-cooling mould improved, including bed die (1), cooling water block (3), copper backing (5) and heat insulation Groove (6), it is characterised in that: arrange with type heat dam (6) between copper backing (5) and bed die (1), at bed die (1) and cooling water Heat dam (6) deep for 2mm is set on the contact surface of block (3).