CN203495139U - Pre-tightening molding device for sand casting of automobile brake drum - Google Patents
Pre-tightening molding device for sand casting of automobile brake drum Download PDFInfo
- Publication number
- CN203495139U CN203495139U CN201320695900.3U CN201320695900U CN203495139U CN 203495139 U CN203495139 U CN 203495139U CN 201320695900 U CN201320695900 U CN 201320695900U CN 203495139 U CN203495139 U CN 203495139U
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- Prior art keywords
- pretension
- limiting plate
- tightening
- brake drum
- post
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- Expired - Fee Related
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Abstract
The utility model provides a pre-tightening molding device for the sand casting of an automobile brake drum. The pre-tightening molding device comprises a pre-tightening pillar (1) and a limiting screw rod (2), wherein the upper end of the pre-tightening pillar (1) is connected with the limiting screw rod (2); the lower end face of the pre-tightening pillar (1) is provided with a ring-shaped limiting plate (3); the outer diameter of the limiting plate (3) is more than that of the pre-tightening pillar (1); the axis of the pre-tightening pillar (1) and the axis of the limiting plate (3) are arranged on the same straight line; compared with the prior art, the pre-tightening molding device provided by the utility model has the characteristics that sand is hard to fall off in the molding process, the sand mold molding rate can be increased, and the sand mold production efficiency can be greatly improved.
Description
Technical field
The utility model belongs to sand casting technical field, particularly relates to a kind of pretension for automobile brake drum sand casting and plays type device.
Background technology
At present, heavy truck brake drum is cast iron quality, conventionally adopts sand casting mode to produce blank, the mould of production use is sand mold casting mold, is respectively cope match plate apperance, mo(u)ld bottom half template die sample, but the reason due to product structure characteristic, cause mold bottom die cavity to cross serious offense dark, make mo(u)ld bottom half template die sample when filling moulding, bottom is difficult for compressing compacting, the bottom close-over drop that easily comes off when this just causes close-over to play type, cause sand mold to lose efficacy, thus exist sand mold ratio of briquetting lower, the problem that production efficiency is lower
Utility model content
When the utility model provides a kind of type for above problem, difficult drop-off drop, can increase sand mold ratio of briquetting, and the pretension for automobile brake drum sand casting that can significantly improve sand mold production efficiency plays type device.
The utility model overcomes the above problems technical scheme used: provide a kind of pretension for automobile brake drum sand casting to play type device, it comprises pretension post and Limit screw, the upper end of described pretension post is connected with Limit screw, described pretension post lower surface is provided with annular limiting plate, the external diameter of described limiting plate is greater than the external diameter of pretension post, and the axis of pretension post and the axis of limiting plate are on same straight line.
Adopt after above method and apparatus, compared with prior art, when the utility model is used, be placed on down and touch on sample, make down to touch the axis of sample and the axis of pretension post on same straight line, for ease of placing, lower Mo Yangshang center is provided with the counterbore identical with limiting plate size and shape,, after filling moulding, under the effect of pretension post, limiting plate and Limit screw, limiting plate plays a spacing effect to close-over bottom, while making close-over play type, bottom difficult drop-off or drop, and then increase sand mold ratio of briquetting, enhance productivity; And rise after type at close-over, pretension post, limiting plate and Limit screw can be taken out from close-over, first Limit screw is backed out, from limiting plate side, extract pretension post subsequently, and the passage staying in close-over does not affect cast product shape, exhaust while being conducive on the contrary sand mold cast product, the yield rate of raising product.While therefore the utlity model has type, difficult drop-off drop, can increase sand mold ratio of briquetting, and can significantly improve the feature of sand mold production efficiency.
As improvement, described Limit screw is provided with suspension ring away from one end of pretension post, after suspension ring arrange, can be by the lifting rope of lifting sandbox simultaneously also through suspension ring, while having made type, pretension post and limiting plate all have a pulling force making progress, and this has just been more conducive to type, and the bottom of close-over is more difficult drop-off or drop also, the efficiency of type is further improved, further enhanced productivity.
As further improvement, the cross section of described pretension post is for falling " U " font structure, and the pretension post own wt of this structure is less, has been beneficial to type; And the material using during preparation is also less, and then reduce preparation cost and the use cost of equipment.
As further improving again, the upper surface of described limiting plate is provided with annular groove, the bottom surface of described groove is arcwall face, after the groove of annular arranges, make limiting plate have horizontal position-limiting action to the bottom of close-over, and then can effectively prevent that close-over bottom from coming off or the situation of drop, made type rate higher; Simultaneously in casting, being called the groove of banking up a fire, is in order to prevent that molten iron from running into the part of finding time in close-over when the cast product.
Accompanying drawing explanation
Fig. 1 is that the utility model plays the structural representation of type device for the pretension of automobile brake drum sand casting.
Fig. 2 is the structural representation after Fig. 1 back-up sand.
Fig. 3 has been that after type, the utility model plays the structural representation of type device and close-over for the pretension of automobile brake drum sand casting.
Fig. 4 is the structural representation of close-over.
As shown in the figure: 1, pretension post, 2, Limit screw, 3, limiting plate, 4, suspension ring, 5, groove, 6, under touch sample.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described further.
A kind of pretension for automobile brake drum sand casting as depicted in figs. 1 and 2 plays type device, it comprises pretension post 1 and Limit screw 2, the upper end of described pretension post 1 is connected with Limit screw 2 that (this example is provided with through hole for the upper end of pretension post, and Limit screw screws with nut after crossing through hole, certainly also can directly in the upper surface of pretension post, screwed hole be set, and Limit screw is direct and screwed hole screws), described pretension post 1 lower surface is provided with annular limiting plate 3, the external diameter of described limiting plate 3 is greater than the external diameter of pretension post 1, and the axis of the axis of pretension post 1 and limiting plate 3 is on same straight line, general pretension post 1 is to be welded by steel pipe and ring flange with the structure of limiting plate 3, under touch sample 6 bottom portion of groove in have in the heart and the equal identical counterbore of limiting plate 3 size and shapes, this facilitates the placement of limiting plate 3, and after integral body is placed on down and touches on sample 6, the upper end of Limit screw 2 will exceed the upper surface of sandbox, facilitate so follow-up from close-over by Limit screw 2, pretension post 1 and Limit screw 2 are taken out.
Described Limit screw 2 is provided with suspension ring 4 away from one end of pretension post 1.
The cross section of described pretension post 1 is for falling " U " font structure, also can be regarded as the end face that pretension post 1 is connected with limiting plate 3 and be provided with counterbore, and the thickness bottom counterbore equals the thickness of the hole wall of counterbore.
The upper surface of described limiting plate 3 is provided with annular groove 5, and the bottom surface of described groove 5 is arcwall face.
During use, first Limit screw 2 is connected on pretension post 1, subsequently integral body is placed on lower template under touch in sample, require suspension ring 4 to exceed the upper surface of sandbox, then toward back-up sand in sandbox, in the process of compacting, can upwards draw by suspension ring 4, the bottom that makes close-over is consolidation more, after whole compacting, by suspender by the utility model integral body along with sandbox and close-over hang out, hang out rear structure and see Fig. 3, screw off subsequently Limit screw 2 and extract, then extracting pretension post 1 from limiting plate 3, last close-over is shown in Fig. 4.
Above embodiment is only preferred embodiment of the present utility model, and the utility model is not limited only to above embodiment and has also allowed other structural change, allly in the utility model rights to independence claimed range, changes, and all belongs to the utility model protection domain.
Claims (4)
1. the pretension for automobile brake drum sand casting plays type device, it is characterized in that: it comprises pretension post (1) and Limit screw (2), the upper end of described pretension post (1) is connected with Limit screw (2), described pretension post (1) lower surface is provided with annular limiting plate (3), the external diameter of described limiting plate (3) is greater than the external diameter of pretension post (1), and the axis of the axis of pretension post (1) and limiting plate (3) is on same straight line.
2. the pretension for automobile brake drum sand casting according to claim 1 plays type device, it is characterized in that: described Limit screw (2) is provided with suspension ring (4) away from one end of pretension post (1).
3. the pretension for automobile brake drum sand casting according to claim 1 plays type device, it is characterized in that: the cross section of described pretension post (1) is for falling " U " font structure.
4. the pretension for automobile brake drum sand casting according to claim 1 plays type device, it is characterized in that: the upper surface of described limiting plate (3) is provided with annular groove (5), and the bottom surface of described groove (5) is arcwall face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320695900.3U CN203495139U (en) | 2013-11-06 | 2013-11-06 | Pre-tightening molding device for sand casting of automobile brake drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320695900.3U CN203495139U (en) | 2013-11-06 | 2013-11-06 | Pre-tightening molding device for sand casting of automobile brake drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203495139U true CN203495139U (en) | 2014-03-26 |
Family
ID=50326146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320695900.3U Expired - Fee Related CN203495139U (en) | 2013-11-06 | 2013-11-06 | Pre-tightening molding device for sand casting of automobile brake drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203495139U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113732253A (en) * | 2021-08-26 | 2021-12-03 | 共享装备股份有限公司 | Forming device |
-
2013
- 2013-11-06 CN CN201320695900.3U patent/CN203495139U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113732253A (en) * | 2021-08-26 | 2021-12-03 | 共享装备股份有限公司 | Forming device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140326 Termination date: 20191106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |