Hub die-casting mould

Abstract

A hub die-casting mold comprises a lower mold, a side mold, and an upper mold that are combined to form a hub casting cavity, where the lower mold is disposed on a lower mold plate, and the side mold is formed by abutting four sections of arc portions which are slidably connected to the lower mold plate, where the four sections of arc portions are divided into two groups that are respectively located at the left and right sides of the lower mold, and included angles from 3 to 10 are set between sliding tracks of two sections of arc portions in each group and a left-right diameter of the lower mold.

Claims

1. A hub die-casting mold, comprising a lower mold (2), a side mold, and an upper mold (4) that are combined to form a hub casting cavity, wherein the lower mold (2) is disposed on a lower mold plate (1), and the side mold is formed by abutting four sections of arc portions (3) which are slidably connected to the lower mold plate (1), wherein the four sections of arc portions (3) are divided into two groups that are respectively located at the left and right sides of the lower mold (2), included angles from 3 to 10 are set between sliding tracks of two sections of arc portions (3) in each group and a left-right diameter of the lower mold (2); and further comprising two connecting blocks (8) that are respectively disposed on outer sides of the two groups of arc portions, wherein the connecting blocks (8) are provided with connecting holes (9), hooks (7) are respectively disposed on exterior walls of the two sections of arc portions (3) in each group, and the hooks (7) are slidably connected to the connecting holes (9).

2. The hub die-casting mold according to claim 1, wherein the lower mold plate (1) is respectively provided with sliding slots (10) at two sides of the left-right diameter of the lower mold (2); and a sliding block (11) fitting with the sliding slot (10) is disposed at a bottom portion of each section of arc portion (3).

3. The hub die-casting mold according to claim 1, wherein each connecting block (8) is provided with two connecting holes (9); and the hooks (7) at the exterior walls of the two sections of arc portions (3) in each group are slidably connected to the two connecting holes (9), respectively.

4. The hub die-casting mold according to claim 3, wherein the hook (7) is formed by a connecting plate which is connected to an exterior wall of an abutting end of two arc portions (3) and a vertical column that is fixed on an upper surface of the connecting plate; and the vertical column runs through the connecting hole (9).

5. The hub die-casting mold according to claim 1, wherein the exterior wall of the side mold is a truncated cone of which one end is large and the other end is small; the exterior wall of the side mold is connected to an annular mold locking sleeve (6); an inner diameter of the mold locking sleeve (6) is between an outer diameter of the large end and an outer diameter of the small end of the exterior wall of the side mold; and an inner wall of the mold locking sleeve (6) has a conical degree same as that of the exterior wall of the side mold.

6. The hub die-casting mold according to claim 5, wherein the conical degree of the exterior wall of the side mold is from 8 to 12.

7. The hub die-casting mold according to claim 5, wherein an axial length of the mold locking sleeve (6) is to of a height of the side mold.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic diagram of a mold opening state according to the present invention;

(2) FIG. 2 is a schematic diagram of a mold clamping state according to the present invention; and

(3) FIG. 3 is a schematic diagram of a connection structure between arc portions and a lower mold plate.

DETAILED DESCRIPTION

(4) A hub die-casting mold shown in FIG. 1, FIG. 2, and FIG. 3 includes a lower mold 2, a side mold, and an upper mold 4 that are combined to form a hub casting cavity. An upper end of the upper mold 4 is connected to an ejection rod plate 5. The lower mold 2 is disposed on a lower mold plate 1. An exterior wall of the side mold is a truncated cone that has a conical degree from 8 to 12 and of which one end is large and the other end is small. The exterior wall of the side mold is connected to an annular mold locking sleeve 6 whose an axial length is to of a height of the side mold. An inner diameter of the mold locking sleeve 6 is between an outer diameter of the large end and an outer diameter of the small end of the exterior wall of the side mold; and an inner wall of the side mold has a conical degree same as that of the exterior wall of the side mold.

(5) The side mold is formed by abutting four sections of arc portions 3 which are slidably connected to the lower mold plate 1. The four sections of arc portions 3 are divided into two groups that are respectively located at the left and right sides of the lower mold 2. The lower mold plate 1 is symmetrically provided with sliding slots 10 at two sides of a left-right diameter of the lower mold 2, where included angles between the sliding slots and the left-right diameter are from 3 to 10. A sliding block 11 fitting with the sliding slot 10 is disposed at a bottom portion of each section of arc portion 3. The hub die-casting mold further includes two connecting blocks 8 that are respectively disposed on outer sides of the two groups of arc portions. The connecting blocks 8 are provided with two slotted connecting holes 9. Hooks 7 are respectively disposed on exterior walls of two sections of arc portions 3 in each group. The hooks 7 are formed by a connecting plate which is connected to an exterior wall of an abutting end of two arc portions 3 and a vertical column that is fixed at an upper surface of the connecting plate. The vertical column runs through the connecting hole 9.

(6) Horizontal oil cylinders which drive the connecting blocks 8 push the arc portions 3 to move along inclined sliding slots to abut with each other. Vertical oil cylinders drive the mold locking sleeve 6 lower, to be sleeved at the exterior wall of the side mold, so as to achieve locking. Then, the upper mold 4 moves downward to implement mold clamping. A part of acting force exerted by the cavity on the side mold is used to overcome a friction force between the mold locking sleeve 6 and the side mold, and the other part is directly exerted on the mold locking sleeve 6. Therefore, specifications of the horizontal oil cylinders and the vertical oil cylinders are both significantly decreased. When demolding is performed, the upper mold 4 and the mold locking sleeve 6 are first lifted sequentially, and then the side mold is opened.