CN209110119U - Sand core component - Google Patents

Abstract

A kind of sand core component, for casting auto parts and components, which is characterized in that the sand core component includes: the sand core made of molding sand, and the inside of the sand core has inner cavity, and the shape of the sand core is consistent with the shape of auto parts and components to be cast；It engages in the outside of the sand core with the sand core to provide the sand core bracket of support and transfer for the sand core；And the arbor being bonded in the inner cavity of the sand core internal and with the entire inner wall of the sand core inner cavity, the shape of the arbor are consistent with the shape of the inner wall of the sand core.By increasing in sand core internal and sand core not only increases sand core strength with the arbor of type, but also sand core weight is alleviated, so that casting deformation amount is stablized within 1mm, reduce casting cost.

Description

Sand core component

Technical field

This application involves casting technology field, in particular to the sand core and core of a kind of manufacture for automobile support class casting Bone component.

Background technique

With the development of national economy and the continuous improvement of people's purchasing power, become to the demand of automobile in what is quicklyd increase Gesture, also higher and higher to the quality requirement of auto parts and components at the same time, many of auto parts and components are all cast member, bracket As an important spare part of automobile, critical support effect is played in the car, therefore it is required that part has high-intensitive, low shape The mechanical performance of change.Support parts are because of structure problem, often in casting process due tos pouring temperature, poring rate etc. Casting is caused to be cooled and shaped process contraction distortion, so that final casting dimension is undesirable, product qualified rate is low, finally Lead to that the production cost increases.If the ratio of defects of casting is too high, competitiveness can be lost in automotive field.Thus, it is desirable that Support parts castability is stablized, while also to meet unlike material requirement, this just proposes higher want to Foundry Production It asks, especially there is very high requirement to sand core used in casting, since sand core strength is low in the casting process of support parts, Often there is the deflection of 1.0-2.0mm, this deflection needs reduce or eliminate, it is therefore desirable to during traditional coremaking Increase a kind of intensity for increasing sand core with brod, guarantees sand core minimal deformation, finally ensure casting without deformation.

Utility model content

The application's is designed to provide a kind of deformation that can be reduced or eliminate automobile support components in casting process The sand core component of defect.

In order to solve the above technical problems, the application provides a kind of sand core component, it is used to cast auto parts and components, the sand Core assembly includes: the sand core made of molding sand, and the inside of the sand core has an inner cavity, and the shape of the sand core and to be cast The shape of auto parts and components is consistent；The outside of the sand core engage with the sand core with for the sand core provide support and The sand core bracket of transfer；And the core being bonded in the inner cavity of the sand core internal and with the entire inner wall of the sand core inner cavity Bone, the shape of the arbor are consistent with the shape of the inner wall of the sand core.

Optionally, the arbor is manufactured with molding process using lower core method by mold.

Optionally, the sand core is made by covering sand on the arbor.

Optionally, sand layer of the sand core on arbor with a thickness of about 7mm.

Optionally, the arbor is the thin-wall construction with cavity, and wall thickness is about 5mm.

Optionally, the arbor is made of metal material resistant to high temperature.

Optionally, the sand core bracket is detachably connected with the sand core and arbor.

Optionally, the sand core is inverted funnel shaped, has recess portion, the sand on the opposite side wall of a pair of sand core There is pin with the recesses fit, the cooperation of the recess portion and the pin is by the sand core bracket and sand core and core in core support Bone is combined.

Optionally, the height of the arbor is less than or equal to the height of the sand core inner cavity, covers sand in sand core and is molded into core After on bone, the arbor is completely covered in the sand core.

Optionally, the arbor is reusable arbor.

The beneficial effects of the present application are as follows: arbor is manufactured by the shape of sand core completely, i.e. arbor design meets core box The structure of size and sand core is placed in back-up sand coremaking in core box during coremaking, and arbor is all buried in sand core internal not Expose, it is therefore prevented that glue iron when casting, achieved the purpose that increasing intensity prevents broken core, design is rationally fine.

Arbor is uniformly implanted into sand core by coremaking process, forms sand core skeleton, increases sand core strength.Increase in casting Add iron-resistant hydraulic impact, the casting deformation amount of sand core small, product size is stablized, and arbor one-step casting is reusable, drops significantly Low production cost.

Detailed description of the invention

The aforementioned and other aspects of the application will more completely be managed and that is done with reference to the accompanying drawings is discussed in detail Solution and understanding, in the accompanying drawings:

Fig. 1 is sand core-arbor combination schematic perspective view according to the application；

Fig. 2 is the schematic cross sectional views combined according to sand core-arbor of the application along X-X axis；

Fig. 3 is to combine portion's view that the line A-A in Fig. 1 and Fig. 2 is intercepted according to sand core-arbor of the application；

Fig. 4 is the schematic cross sectional views according to the sand core component of the application；

Fig. 5 is the cross-sectional view intercepted according to the sand core component of the application along Fig. 4 middle line B-B.

Specific embodiment

It is with reference to the accompanying drawings and embodiments, right in order to which the objects, technical solutions and advantages of the application are more clearly understood The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, and It is not used in restriction the application.

Fig. 1 schematically shows the sand core according to the application-arbor combination, detailed section view such as Fig. 2 with perspective view Shown in 3.Sand core-arbor combination structure and manufacturing process are described below with reference to Fig. 1-3.

The shape of sand core 1 can determine according to the shape for the components to be manufactured, specifically, the shape of sand core 1 with The shape of components is consistent, can be the shape of various complexity, shape involved in detailed description below only as Example can carry out various modifications according to actual needs not to the limitation of the application.

For example, according to an embodiment of the present application, sand core 1 is inverted funnel-form, has open bottom surface 11 And closed top surface 12 and four sides 13,14,15,16 between bottom surface 11 and top surface 12, and the area of bottom surface 11 Less than top surface 12, so that sand core 1 has the cross of general rectangular perpendicular to its longitudinal centre line X-X around the inner cavity 17 for going out sand core 1 The wall thickness in section, sand core 1 can be needed according to practical casting and be set, for example, being in this application about 7mm.

Connection in order to facilitate the demoulding of sand core 1, between four sides 13,14,15,16 of sand core 1 and top surface 12 Place is provided with knuckle, and side 14 and 16 is made of two inclined planar sections respectively.

On two opposite sides 13 and 15 of sand core 1, it is provided with recess portion 18, medially with the bracket with sand core component Pin on (showing in figures 4 and 5) matches, for maintaining sand core 1.The recess portion 18 is preferably circular, but may be it His shape, such as triangle, rectangular, polygon etc..

Sand core 1 is usually bonded by molding sand, and is thin wall shape structure, is easy to collapse in the casting process for components It falls into, especially hollow sand core, for this purpose, arbor 2 is provided in inner cavity 17 in sand core 1, as shown in Figure 1-3, sand core 1 is complete Arbor 2 is enveloped entirely, and arbor 2 is also thin-walled hollow structure inverted funnel-shaped, the outer shape of arbor 2 and the inner cavity of sand core 1 17 shape is completely the same, so that the entire inner wall with sand core 1 is bonded, to provide the support in structure for sand core 1.

Arbor 2 is by resistance to casting high temperature and there is high-intensitive material to be made, and is preferably made by casting of metal, arbor 2 The fusing point of material is preferably higher than casting temperature.Arbor 2 can be moulded using mold by lower core method, and the wall thickness of arbor 2 can be with It is set according to the wall thickness of sand core 1 and institute environment to be used, is preferably set to 5mm in this application.

Fig. 2 is the cross-sectional view along the longitudinal centre line X-X sand core 1 intercepted, it can be seen that its longitudinal cross-section has trapezoidal Shape, the reinforcement lug 19 for the flat pattern that there is the top surface 12 perpendicular to sand core 1 to extend.The longitudinal cross-section of arbor 2 also has Trapezoidal shape is bonded completely with the inner cavity 17 of sand core 1, and arbor 2 is set as hollow structure, has hollow inner cavity 20, to mitigate Weight.

Fig. 3 is the sand core-arbor combination cut along the line A-A at 18 center of circular recess is passed through perpendicular to center line X-X Cross-sectional view.

When manufacture, the arbor 2 of required shape and size can be produced by method of moulding first, then on arbor 2 It covers sand and molds sand core 1, so that the fitting arbor 2 completely of sand core 1, covering sand thickness is preferably 7mm.

In order to, convenient for sand core-arbor combination is moved and operated, be provided with and sand core-arbor group in casting process It closes the bracket 3 matched and shows the application sand core group that sand core 1, arbor 2 and bracket 3 are combined as shown in Figures 4 and 5 The structure of part, Fig. 4 are the longitudinal section view of the sand core component, and Fig. 5 is the line B-B along the center for passing through circular recess 18 in Fig. 4 Cross-sectional view.

As shown in Figures 4 and 5, bracket 3 have clip shape, have with top 31 and two supporting legs 32,32', top 31 is Flat pattern corresponding with lug 19 and there is the hole 33 that matches with the lug 19 of sand core 1, for the insertion of lug 19, two Supporting leg 32,32' extend and extend downwardly along the side of sand core 1 13 and 15, two supporting legs 32 from the bottom end on top 31 to two sides, 32' is respectively provided with the pin 34,35 matched with sand core 1 and two recess portions 18, and the shape of pin 34,35 is opposite with the shape of recess portion 18 It answers, can be round, rectangular, triangle, polygon etc..

The bracket 3 can be made of metal, and can also be made of other high mechanical strengths and material resistant to high temperature, preferably fusing point Higher than casting temperature.

By the construction in the application, arbor 2 is placed in sand core 1 and is bonded with sand core 1, so that the intensity of sand core 1 Great enhancing has been obtained, in addition, arbor is with a thickness of 5mm and is hollow structure, has alleviated sand bone 2 again on the other hand to entire The weight of sand core component.

By sand core internal increase and sand core with the arbor of type rather than the supporting element of simple shape, and by arbor Sand molding sand core is covered, arbor is bonded completely with sand core inner cavity, not only increases sand core strength in this way, but also alleviate sand core weight, make It obtains casting deformation amount to stablize within 1mm, reduces casting cost.Moreover, the applicant is also by it was verified that using arbor Strengthened sand core, after moulding, lower core, deformation of products amount is in 1.0mm hereinafter, considerably increasing product qualification rate.

Although the application is described with regard to preferred embodiment, this is not meant to imply that the limitation to the application, should Understanding, the protection scope of the application is limited by appended claim, under the premise of not departing from the range, this field skill Art personnel can carry out various modifications.

Claims (10)

1. a kind of sand core component, for casting auto parts and components, which is characterized in that the sand core component includes:

The sand core made of molding sand, the inside of the sand core have inner cavity, and the shape of the sand core and automobile zero to be cast The shape of component is consistent；

It engages in the outside of the sand core with the sand core to provide the sand core bracket of support and transfer for the sand core；And

The arbor being bonded in the inner cavity of the sand core internal and with the entire inner wall of the sand core inner cavity, the arbor it is outer Shape is consistent with the shape of the inner wall of the sand core.

2. sand core component according to claim 1, which is characterized in that the arbor is used down by mold with molding process The manufacture of core method.

3. sand core component according to claim 1, which is characterized in that the sand core is by covering sand system on the arbor At.

4. sand core component according to claim 3, which is characterized in that sand layer of the sand core on arbor with a thickness of About 7mm.

5. sand core component according to claim 2, which is characterized in that the arbor is the thin-wall construction with cavity, wall Thickness is about 5mm.

6. sand core component according to claim 5, which is characterized in that the arbor is made of metal material resistant to high temperature.

7. sand core component according to claim 1 to 6, which is characterized in that the sand core bracket and the sand core It is detachably connected with arbor.

8. sand core component according to claim 7, which is characterized in that the sand core is inverted funnel shaped, sand core There is recess portion on a pair of opposite side wall, there is the pin with the recesses fit on the sand core bracket, the recess portion with it is described The cooperation of pin combines the sand core bracket with the sand core and arbor.

9. sand core component according to claim 3, which is characterized in that the height of the arbor is less than or equal to the sand core The height of inner cavity is covered after sand is molded on arbor in sand core, and the arbor is completely covered in the sand core.

10. sand core component according to claim 1 to 6, which is characterized in that the arbor is reusable Arbor.