Split type upper die for casting hub

Abstract

The utility model provides a split type upper die for casting a hub. The split type upper die comprises an upper die mechanism and a lower die mechanism, the upper die mechanism comprises a first upper die and a second upper die; a cavity is formed in the first upper die, and the first upper die is provided with a forming area; the second upper die is of a hollow annular structure, and the first upper die is detachably connected with the second upper die. According to the split type upper die, a traditional integrated upper die is changed into a split type upper die, that is, the upper die mechanism is composed of the first upper die and the second upper die, and the problems that due to the structural problem of an existing integrated upper die, fine lettering grooves and lettering cannot be machined in the back face, working efficiency is affected, and market requirements cannot be met can be effectively solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of wheel hub casting mould, especially relates to a split upper mould for casting wheel hub. BACKGROUND

[0002] Wheel hub is an important part of automobile, is used for supporting tire and connecting to the suspension system of vehicle, it not only influences the appearance of car, also has important influence to the performance of car. Along with the improvement of people's living standards, the individualized demand of car is also higher and higher, therefore wheel hub becomes more and more important.

[0003] With the intensification of market competition and the diversification of consumer demand, more and more customers tend to design inscriptions in the position of wheel hub. This design not only can improve the uniqueness and recognition of product, but also can meet the individualized demand of customers. However, the existing wheel hub casting mould includes upper mould and lower mould, and the upper mould is often integrally formed, due to the structural limitation, it is often difficult to process fine inscription groove and inscription on the back, which increases the processing difficulty and affects the work efficiency, so as to not meet the market demand.

[0004] The patent with publication number [CN108160971A] discloses a wheel hub casting mould. In the prior art, the wheel hub casting mould usually adopts the design of integrally formed upper mould. However, this design has the following problems: due to the structural limitation of integrally formed upper mould, the inscription processing on the back of wheel hub is difficult. This is because the integrally formed upper mould needs to bear a large pressure and temperature during the casting process, and its structure is relatively complex, so it is difficult to carry out fine processing and inscription operation. Therefore, an improved wheel hub casting mould design is needed to solve the problem of difficult inscription processing on the back caused by integrally formed upper mould. UTILITY MODEL CONTENTS

[0005] Therefore, it is necessary to provide a split upper mould for casting wheel hub aiming at the above technical problems.

[0006] A split upper mould for casting wheel hub, comprising: an upper mould mechanism;

[0007] The upper mould mechanism comprises a first upper mould and a second upper mould;

[0008] A cavity is formed in the first upper mould, and the first upper mould is provided with a forming area;

[0009] The second upper mould is a hollow ring structure, and the first upper mould and the second upper mould are detachably connected.

[0010] In one embodiment, the detachable connection structure of the first upper mould and the second upper mould is provided as follows:

[0011] The lower end of the first upper die is provided with a first annular groove, and the upper end of the second upper die is provided with a first annular protrusion which is detachably inserted into the first annular groove.

[0012] Or

[0013] The lower end of the first upper die is provided with a second annular protrusion, the upper end of the second upper die is provided with a second annular groove, and the second annular protrusion is detachably inserted into the second annular groove.

[0014] In one embodiment, the inner side of the upper end of the second upper die is provided with a plurality of cooling grooves.

[0015] In one embodiment, the horizontal cross section of the cooling groove is a rectangular with rounded corners.

[0016] In one embodiment, the lower end of the first upper die is provided with a plurality of extensions inside the cavity, and each of the extensions is provided with a first positioning hole.

[0017] In one embodiment, the cooling groove is provided with a second positioning hole between the adjacent cooling groove.

[0018] In one embodiment, a positioning pin is further included, which is inserted into the first positioning hole and the second positioning hole.

[0019] In one embodiment, the top of the first upper die is provided with a plurality of exhaust holes which are arranged in a ring shape.

[0020] In one embodiment, the upper end of the second upper die is provided with a plurality of lettering grooves.

[0021] In one embodiment, the horizontal cross section of the lettering groove is a rectangular with rounded corners.

[0022] The split upper die changes the traditional upper die from an integrated type to a split type, i.e. the upper die assembly is composed of a first upper die and a second upper die, which can effectively avoid the problem that the existing integrated upper die cannot process fine lettering grooves and letters on the back due to structural problems, thereby affecting the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 2 is a structure diagram of the first upper die and the second upper die combined in one embodiment of the split upper die;

[0024] Figure 2 Fig. 3 is another structure diagram of the first upper die and the second upper die combined in one embodiment of the split upper die;

[0025] Figure 3 A structural schematic diagram of a first upper die of a split upper die in an embodiment;

[0026] Figure 4 Another structural schematic diagram of the first upper die of the split upper die in an embodiment;

[0027] Figure 5 A structural schematic diagram of a second upper die of a split upper die in an embodiment;

[0028] Figure 6 Another structural schematic diagram of the second upper die of the split upper die in an embodiment;

[0029] In the drawings, 10, an upper die mechanism; 30, a forming area; 110, a first upper die; 120, a second upper die; 210, a cavity; 310, a first annular protrusion; 410, a first annular groove; 610, an exhaust hole; 810, a cooling groove; 811, an extension; 812, a first positioning hole; 813, a second positioning hole; 910, an engraved groove. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application. EMBODIMENT

[0031] In the present embodiment, as shown in Figures 1 to 2 , a split upper die for casting a wheel hub is provided, comprising: an upper die mechanism;

[0032] As shown in Figure 1 , the upper die mechanism comprises a first upper die and a second upper die, the first upper die is provided with a cavity, and the first upper die is provided with a forming area; the second upper die is a hollow annular structure, and the first upper die and the second upper die are detachably connected.

[0033] Specifically, the upper die of a general wheel hub casting die is integrally formed, and due to the limitation of the structure of the upper die, it is not possible to process fine engraved grooves and characters on the back. Therefore, the upper die is changed from the original integral forming to a split type, and the upper die mechanism comprises a first upper die and a second upper die. The lower end of the first upper die is detachably connected to the upper end of the second upper die, that is, the first upper die and the second upper die can be combined into an upper die mechanism. Since the upper die mechanism is changed from the original integral forming to a split structure, fine engraved grooves and characters can be processed on the back of the second upper die. At the same time, after casting is completed, the second upper die can be easily detached from the upper die mechanism for subsequent processing or cleaning.

[0034] The split upper die of the hub mold in the above embodiment changes the traditional upper die from a unitary type to a split type, i.e., the upper die mechanism is composed of a first upper die and a second upper die, and the first upper die and the second upper die can be detachably connected, thereby effectively avoiding the problem that the fine lettering groove and lettering on the back cannot be processed due to the structure of the existing unitary upper die, and affecting the work efficiency.

[0035] In one embodiment, as shown in Figures 3 to 6 the detachable connection structure of the first upper die and the second upper die is arranged as follows: the lower end of the first upper die is provided with a first annular groove, and the upper end of the second upper die is provided with a first annular protrusion, and the first annular protrusion is detachably inserted into the first annular groove.

[0036] In the above embodiment, in order to realize the detachable connection of the first upper die and the second upper die, the lower end of the first upper die is provided with a first annular groove, and the upper end of the second upper die is provided with a first annular protrusion. The first annular protrusion is detachably inserted into the first annular groove, and the insertion structure of the first annular protrusion and the first annular groove makes the connection of the first upper die and the second upper die more stable.

[0037] In one embodiment, the detachable connection structure of the first upper die and the second upper die is arranged as follows: the lower end of the first upper die is provided with a second annular protrusion, the upper end of the second upper die is provided with a second annular groove, and the second annular protrusion is detachably inserted into the second annular groove.

[0038] In the above embodiment, in order to realize the detachable connection of the first upper die and the second upper die, the lower end of the first upper die is provided with a second annular protrusion, and the upper end of the second upper die is provided with a second annular groove. The second annular protrusion is detachably inserted into the second annular groove, and the insertion structure of the second annular protrusion and the second annular groove makes the connection of the first upper die and the second upper die more stable.

[0039] In order to improve the cooling effect in the casting process, shorten the cooling time, and improve the production efficiency and the quality of the castings. In one embodiment, as shown in Figures 5 to 6 the inner side of the upper end of the second upper die is provided with a plurality of cooling grooves. In this embodiment, the cooling grooves are arranged to improve the cooling effect in the casting process, shorten the cooling time, and improve the production efficiency and the quality of the castings.

[0040] In one embodiment, the horizontal cross section of the cooling groove is a rectangular with rounded corners.

[0041] In one embodiment, as shown in Figures 3 to 4 the lower end of the first upper die is provided with a plurality of extension portions along the cavity, and each of the extension portions is provided with a first positioning hole.

[0042] In the above embodiment, in order to realize seamless and accurate combined connection of the first upper die and the second upper die, a plurality of extension parts are arranged at the lower end of the first upper die along the cavity, and a first positioning hole is arranged on the extension part.

[0043] In one embodiment, as shown in the figure, a second positioning hole is arranged between the cooling groove and the adjacent another cooling groove. Figures 5 to 6

[0044] In the above embodiment, in order to realize seamless and accurate combined connection of the first upper die and the second upper die, a second positioning hole is arranged between the cooling groove and the adjacent another cooling groove.

[0045] In one embodiment, the upper die mechanism further comprises a positioning pin (not shown in the figure), which is inserted into the first positioning hole and the second positioning hole.

[0046] In the above embodiment, in order to realize seamless and accurate combined connection of the first upper die and the second upper die, the upper die mechanism further comprises a positioning pin, which is inserted into the first positioning hole and the second positioning hole. In this embodiment, the positioning pin is usually a cylindrical steel element with accurate diameter and straightness, and the positioning hole is a hole matched with the positioning pin. By inserting the positioning pin into the first positioning hole and the second positioning hole, the positioning of the first upper die and the second upper die is accurate and convenient when they are assembled.

[0047] In the casting process, a large amount of gas will be generated when the molten metal fills the cavity. If these gases are not timely discharged, pores will be formed in the casting, affecting the product quality. In one embodiment, as shown in the figure, a plurality of exhaust holes are arranged at the top of the first upper die, and the exhaust holes are arranged in a ring shape. In this embodiment, a plurality of exhaust holes are arranged at the top of the first upper die. The existence of the exhaust holes is to timely discharge these gases and ensure that there are no pores in the casting. In addition to discharging air, the exhaust holes can also prevent the accumulation of gases in the molten metal during the cooling process, causing shrinkage holes in the casting. Figure 3

[0048] In one embodiment, as shown in the figure, in order to further carry out fine processing and lettering operation, a plurality of lettering grooves are symmetrically arranged at the upper end of the second upper die. In this embodiment, a plurality of lettering grooves are symmetrically arranged at the upper end of the second upper die. Since the first upper die and the second upper die are detachably connected, the lettering grooves arranged on the second upper die facilitate the later processing, ensure the consistency and aesthetics of lettering, and also facilitate the manufacture and use of the mold. Figure 5

[0049] ​​​In one embodiment, the horizontal cross section of the character groove is a rectangle with rounded corners. In this embodiment, the horizontal cross section of the character groove is a rectangle with rounded corners, which can make the characters look softer and more design-oriented, and can reduce stress concentration during casting and prevent cracks from occurring. At the same time, the rounded corner design is more conducive to the molten metal being more easily released from the mold after cooling and solidification, reducing the problem of adhesion caused by sharp corners.

[0050] The technical features of the above embodiments can be combined in any manner. In order to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not contradict, they should be considered as falling within the scope of the present disclosure.

[0051] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A split upper mold for casting a wheel hub, characterized by, The utility model relates to a mould mechanism for injection moulding, comprising: An upper mould mechanism; The upper mould mechanism comprises a first upper mould and a second upper mould; A cavity is formed in the first upper mould, and the first upper mould is provided with a forming area; The second upper mould is a hollow ring structure, and the first upper mould and the second upper mould are detachably connected.

2. The split upper mold for casting a wheel hub according to claim 1, wherein The detachable connection structure of the first upper mould and the second upper mould is provided as follows: A first annular groove is arranged at the lower end of the first upper mould, and a first annular protrusion matched with the first annular groove is arranged at the upper end of the second upper mould, and the first annular protrusion is detachably inserted into the first annular groove; or a second annular protrusion is arranged at the lower end of the first upper mould, and a second annular groove matched with the second annular protrusion is arranged at the upper end of the second upper mould, and the second annular protrusion is detachably inserted into the second annular groove.

3. The split upper mold for casting a wheel hub according to claim 1, wherein A plurality of cooling grooves are arranged at the inner side of the upper end of the second upper mould.

4. The split upper mold for casting a wheel hub according to claim 3, wherein The horizontal cross section of the cooling groove is a rectangular with rounded corners.

5. The split upper mold for casting a wheel hub of claim 3, wherein, A plurality of extension parts are arranged at the lower end of the first upper mould along the cavity, and a first positioning hole is arranged on each extension part.

6. The split upper mold for casting a wheel hub of claim 5, wherein, A second positioning hole is arranged between the cooling groove and the adjacent cooling groove.

7. The split upper mold for casting a wheel hub of claim 6, wherein, A positioning pin is further arranged, which is inserted into the first positioning hole and the second positioning hole.

8. The split upper mold for casting a wheel hub of claim 1, wherein, A plurality of exhaust holes are symmetrically arranged at the top of the first upper mould, and the exhaust holes are arranged in a ring shape.

9. The split upper mold for casting a wheel hub of claim 1, wherein, A plurality of lettering grooves are symmetrically arranged at the upper end of the second upper mould.

10. The split upper mold for casting a wheel hub of claim 9, wherein, The horizontal cross section of the lettering groove is a rectangular with rounded corners.

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