A cast forming mold for an oil collection housing and method of use

Abstract

The application discloses a casting forming die for an oil collecting shell and belongs to the technical field of thin-wall part casting devices. The die comprises a rear seat and a front seat which are connected with each other. An inner cavity die with an outer contour consistent with the shape of an inner cavity of a shell to be formed is arranged in the middle of the rear seat. A sprue, a front section riser, a middle section riser and a rear section riser are formed on the front seat. One end of each of the risers extends to the upper end face of the front seat, and the other end is connected with a corresponding discharge groove of a shell die seat. The inner cavity shape of the shell die seat is consistent with the outer contour of the shell to be formed. A chill assembly is further arranged on the shell die seat, and a forming rib vent groove is further formed on the top of the shell die seat. The application effectively solves the problems of local non-forming of parts and internal organization shrinkage and porosity in the current casting production of the oil collecting shell.

Description

Technical Field

[0001] This invention relates to the field of thin-walled casting device technology, specifically to a casting mold for an oil collecting shell and its usage method. Background Technology

[0002] Thin-walled, complex shell structures are common and difficult-to-machine devices encountered in the casting industry, such as in casting production. Figure 1 and Figure 2 When designing the oil collection housing shown, the product requires sealing performance, the parts need to be welded to other components, and it also needs certain processing properties. Sand casting would not be feasible for large-scale production, and the resulting molding would result in poor surface and internal quality. Pressure casting produces parts with subcutaneous porosity and cannot be welded. Therefore, designing a casting mold to prevent localized incomplete forming, shrinkage cavities, and porosity in the internal structure during the casting process is a current challenge. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a casting mold for an oil collecting shell, so as to solve the problems of partial incomplete forming of parts and shrinkage cavities and porosity in the current casting production of oil collecting shells.

[0004] To address the above problems, the present invention provides the following technical solution:

[0005] A casting mold for an oil collecting shell; it includes a rear seat and a front seat that are connected to each other;

[0006] A first strip-shaped through hole is opened in the middle of the rear seat; a positioning block is installed in the first strip-shaped through hole, and an inner cavity mold is provided on the side of the positioning block facing the front seat; the outer contour of the inner cavity mold is consistent with the inner cavity shape of the shell to be formed.

[0007] A second strip-shaped through hole is opened in the middle of the front seat; a sprue, a front riser, a middle riser, and a rear riser are also opened on the end face of the front seat opposite the rear seat; one side of the sprue, the front riser, the middle riser, and the rear riser extends to the upper end face of the front seat, and the other end connects to the second strip-shaped through hole; a shell mold seat is installed at the second strip-shaped through hole; the inner cavity shape of the shell mold seat is consistent with the outer contour of the shell to be formed; a discharge groove communicating with the sprue, the front riser, the middle riser, and the rear riser is also opened on the side wall of the shell mold seat; a chill assembly is also provided on the shell mold seat, and a forming rib venting groove is also opened on the top of the shell mold seat.

[0008] Preferably, there are connecting holes at diagonal positions on the rear seat and the front seat; the rear seat and the front seat are connected by functional rods provided at the connecting holes.

[0009] Preferably, through holes are provided on the inner cavity mold and the positioning block, and the through holes are arranged along the height direction; the positioning block and the inner cavity mold are connected by a vent plug; and the end of the vent plug on one side of the inner cavity mold forms a smooth and continuous curved surface with the corresponding position on the surface of the inner cavity mold.

[0010] Preferably, a pre-rise is also provided on the front seat between the runner and the front riser. The pre-rise communicates with the second strip-shaped through hole only on the middle inlet side; the front riser, the middle riser, and the rear riser are all funnel-shaped channels that connect to the second strip-shaped through hole, with one side smaller and the other side larger.

[0011] Preferably, the outer shell mold base includes a front mold base, a middle mold base, and a rear mold base connected to each other; the front mold base, the middle mold base, and the rear mold base have rectangular block structures with cavities at their bottoms; discharge grooves corresponding to the front riser, the middle riser, and the rear riser are respectively provided on the side end faces of the front mold base, the middle mold base, and the rear mold base; and the front mold base is also provided with a discharge groove corresponding to the sprue.

[0012] Preferably, there are three chill assemblies: a front chill on the front mold base, a middle chill on the middle mold base, and a rear chill on the rear mold base; positioning slots are provided at the ends of the front mold base and the middle mold base on the side opposite to the front riser and the middle riser; the front chill and the middle chill are located at the positioning slots, and the rear chill is located at the tail end of the inner cavity of the rear mold base.

[0013] Preferably, a positioning slot is also provided on the front seat at the position corresponding to the front chill and the middle chill, and the positioning slot on the front seat and the front chill and the middle chill are provided with assembly holes; the front mold seat and the middle mold seat are detachably mounted on the front seat through the assembly holes on the front chill and the middle chill and the corresponding connecting parts.

[0014] Preferably, the forming rib ventilation groove is located on the outer shell mold base at the position corresponding to the upper rib plate of the shell to be formed; the forming rib ventilation groove is a strip-shaped groove structure that is wider at the top and narrower at the bottom, and the width of the groove connected to the inner cavity of the outer shell mold base does not exceed 0.2mm.

[0015] This invention also discloses a method for using a casting mold for an oil collecting shell, which includes the following steps:

[0016] S1. The inner cavity mold and the positioning block are connected and fixed by the vent plug, and the assembled components are installed on the first strip-shaped through hole of the rear seat;

[0017] S2. Install the front chill and the middle chill on the positioning slots of the front mold base and the middle mold base, then install the rear chill into the rear mold base. After that, place the front mold base and the middle mold base on the second through hole of the front base, and connect the front chill and the middle chill to the front base through the hole-shaft fit. After that, snap the rear mold base into the remaining mounting device of the second through hole.

[0018] S3. Connect the front seat and the rear seat through the functional rod, so that the riser faces upward;

[0019] S4. After the connection is completed, feed material from the inlet of the gating system to cast the shell.

[0020] S5. Once the shell is fully formed, proceed with the demolding process.

[0021] Beneficial effects of this invention:

[0022] This invention designs a casting mold for an oil collecting shell. Based on the metal gravity casting method, it incorporates front and rear seats, as well as corresponding inner and outer shell mold structures. It employs forming ribs with through-grooves on the mold to ensure the formation of cooling ribs. The riser's design position is optimized for feeding, ensuring no shrinkage cavities occur internally and no external shrinkage occurs. Furthermore, chills are placed at the bottom of the part where the wall thickness is relatively large to accelerate cooling and prevent shrinkage cavities and external shrinkage in these areas. Vent plugs on the mold cavity prevent gas from escaping from areas prone to gas accumulation, thus preventing internal porosity and surface defects. The overall casting mold structure is also optimized based on the above design. Attached Figure Description

[0023] Figure 1 This is the shell structure to be processed and formed in this embodiment;

[0024] Figure 2 yes Figure 1 A schematic diagram of the device from another perspective;

[0025] Figure 3 This is a schematic diagram of the assembly structure of the inventive device in this embodiment;

[0026] Figure 4 yes Figure 3 A schematic diagram of the structure after the front seats have been removed.

[0027] Figure 5 This is a schematic diagram of the rear seat structure in this embodiment;

[0028] Figure 6 yes Figure 3 A schematic diagram of the structure after removing the rear seat;

[0029] Figure 7This is a schematic diagram of the front seat in this embodiment;

[0030] Figure 8 This is a schematic diagram of the assembly structure of the positioning block, the inner cavity mold, and the outer shell mold in this embodiment;

[0031] Figure 9 This is a schematic diagram of the assembly of the positioning block and the inner cavity mold in this embodiment;

[0032] Figure 10 This is a schematic diagram of the outer shell mold in this embodiment;

[0033] Figure 11 yes Figure 10 A schematic diagram of the device from another perspective;

[0034] Figure 12 yes Figure 10 A schematic diagram of the device from another perspective;

[0035] Figure 13 This is a partially enlarged cross-sectional view of the location of the ventilation groove of the forming rib in this embodiment;

[0036] Figure 14 This is a schematic diagram of the expected formed blank after casting using the device in this embodiment;

[0037] Figure 15 yes Figure 14 A schematic diagram from another perspective of the blank;

[0038] Explanation of reference numerals in the attached drawings: 1. Rear seat; 1A. First strip-shaped through hole; 2. Front working; 2A. Second strip-shaped through hole; 2B. Sprue; 2C. Front riser; 2D. Middle riser; 2E. Rear riser; 2F. Pre-riser; 3. Positioning block; 4. Inner cavity mold; 5. Outer shell mold base; 5A. Front mold base; 5B. Middle mold base; 5C. Rear mold base; 5D. Vent groove; 6. Functional rod; 7. Vent plug; 8. Front chill; 9. Middle chill; 10. Rear chill. Detailed Implementation

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0040] Example:

[0041] Reference Figure 1 This embodiment provides a casting mold for an oil collecting shell; it includes a rear seat 1 and a front seat 2 that are connected to each other;

[0042] A first strip-shaped through hole 1A is opened in the middle of the rear seat 1; a positioning block 3 is installed in the first strip-shaped through hole 1A, and an inner cavity mold 4 is provided on the side of the positioning block 3 facing the front seat 2; the outer contour of the inner cavity mold 4 is consistent with the inner cavity shape of the shell to be formed.

[0043] A second strip-shaped through hole 2A is opened in the middle of the front seat 2; a sprue 2B, a front riser 2C, a middle riser 2D, and a rear riser 2E are also opened on the end face of the front seat 2 facing the rear seat 1; one side of the sprue 2B, the front riser 2C, the middle riser 2D, and the rear riser 2E extends to the upper end face of the front seat 2, and the other end is connected to the second strip-shaped through hole 2A; a shell mold base 5 is installed at the second strip-shaped through hole 2A; the inner cavity shape of the shell mold base 5 is consistent with the outer contour of the shell to be formed; a discharge groove communicating with the sprue 2B, the front riser 2C, the middle riser 2D, and the rear riser 2E is also opened on the side wall of the shell mold base 5; a chill assembly is also provided on the shell mold base 5, and a forming rib venting groove 5D is also opened on the top of the shell mold base 5.

[0044] There are connecting holes at diagonal positions on the rear seat 1 and the front seat 2; the rear seat 1 and the front seat 2 are connected by a functional rod 6 set at the connecting hole.

[0045] Through holes are opened on the inner cavity mold 4 and the positioning block 3, and the through holes are arranged along the height direction; the positioning block 3 and the inner cavity mold 4 are connected by a vent plug 7; and the end of the vent plug 7 on one side of the inner cavity mold 4 forms a smooth and continuous curved surface with the corresponding position on the surface of the inner cavity mold 4.

[0046] A pre-rise 2F is also provided on the front seat 2 between the runner 2B and the front riser 2C. The pre-rise 2F communicates with the second strip-shaped through hole 2A only on the middle inlet side; the front riser 2C, the middle riser 2D and the rear riser 2E are all funnel-shaped channels that are connected to the second strip-shaped through hole 2A, with one side smaller and the other side larger.

[0047] The outer mold base 5 includes a front mold base 5A, a middle mold base 5B, and a rear mold base 5C connected to each other; rectangular block structures with cavities at the bottom of the front mold base 5A, the middle mold base 5B, and the rear mold base 5C; discharge grooves corresponding to the front riser 2C, the middle riser 2D, and the rear riser 2E are respectively provided on the side end faces of the front mold base 5A, the middle mold base 5B, and the rear mold base 5C; and a discharge groove corresponding to the sprue 2B is also provided on the front mold base 5A.

[0048] There are three chill assemblies: a front chill 8 on the front mold base 5A, a middle chill 9 on the middle mold base 5B, and a rear chill 10 on the rear mold base 5C. Positioning slots are provided on the front mold base 5A and the middle mold base 5B at the ends opposite to the front riser 2C and the middle riser 2D. The front chill 8 and the middle chill 9 are located in the positioning slots, and the rear chill 10 is located at the tail end of the inner cavity of the rear mold base 5C.

[0049] Positioning slots are also provided on the front seat 2 at positions corresponding to the front chill 8 and the middle chill 9, and assembly holes are opened on the positioning slots of the front seat 2 and the front chill 8 and the middle chill 9; the front mold base 5A and the middle mold base 5B are detachably installed on the front seat 2 through the assembly holes on the front chill 8 and the middle chill 9 and the corresponding connecting parts.

[0050] The forming rib ventilation groove 5D is set on the outer shell mold base 5 at the position corresponding to the upper rib plate of the shell to be formed; the forming rib ventilation groove 5D is a strip-shaped groove structure that is wider at the top and narrower at the bottom, and the width of the groove connected to the inner cavity of the outer shell mold base 5 does not exceed 0.2mm.

[0051] When using the casting mold for the oil collecting shell in this embodiment, the following steps can be followed:

[0052] S1. The inner cavity mold 4 and the positioning block 3 are connected and fixed by the vent plug 7, and the assembled component is installed on the first strip-shaped through hole 1A of the rear seat 1.

[0053] S2. Install the front chill 8 and the middle chill 9 into the positioning slots of the front mold base 5A and the middle mold base 5B, and then install the rear chill 10 into the rear mold base 5C. After that, place the front mold base 5A and the middle mold base 5B on the second through hole 2A of the front base 2, and connect the front chill 8 and the middle chill 9 to the front base 2 through the hole-shaft fit. After that, insert the rear mold base 5C into the remaining mounting position of the second through hole 2A.

[0054] S3. Connect the front seat 2 and the rear seat 1 through the functional rod 6, so that the riser faces upward;

[0055] S4. After the connection is completed, feed material from the inlet position of the gating 2B to cast the shell.

[0056] S5. Once the shell is fully formed, proceed with the demolding process.

Claims

1. A casting mold for an oil collecting shell, characterized in that: It includes a rear seat (1) and a front seat (2) that are connected to each other; A first strip-shaped through hole (1A) is opened in the middle of the rear seat (1); a positioning block (3) is installed in the first strip-shaped through hole (1A), and an inner cavity mold (4) is provided on the side of the positioning block (3) facing the front seat (2); the outer contour of the inner cavity mold (4) is consistent with the inner cavity shape of the shell to be formed; A second strip-shaped through hole (2A) is opened in the middle of the front seat (2); a sprue (2B), a front riser (2C), a middle riser (2D), and a rear riser (2E) are also opened on the end face of the front seat (2) facing the rear seat (1); one side of the sprue (2B), the front riser (2C), the middle riser (2D), and the rear riser (2E) extends to the upper end face of the front seat (2), and the other end is connected to the second strip-shaped through hole (2A); a shell mold base (5) is installed at the second strip-shaped through hole (2A); the inner cavity shape of the shell mold base (5) is consistent with the outer contour of the shell to be formed; on the side wall of the shell mold base (5) It also has a discharge channel that communicates with the gating system (2B), the front riser (2C), the middle riser (2D), and the rear riser (2E); a chill assembly is also provided on the outer shell mold base (5), and a forming rib venting groove (5D) is also provided on the top of the outer shell mold base (5); through holes are provided on the inner cavity mold (4) and the positioning block (3), and the through holes are arranged along the height direction; the positioning block (3) and the inner cavity mold (4) are connected by a vent plug (7); and the end of the vent plug (7) on one side of the inner cavity mold (4) forms a smooth and continuous curved surface with the corresponding position on the surface of the inner cavity mold (4); the outer shell mold base (5) includes front and rear sections connected to each other. The mold base consists of a front mold base (5A), a middle mold base (5B), and a rear mold base (5C); the front mold base (5A), the middle mold base (5B), and the rear mold base (5C) have rectangular block structures with cavities at their bottoms; the front mold base (5A), the middle mold base (5B), and the rear mold base (5C) are respectively provided with discharge grooves corresponding to the front riser (2C), the middle riser (2D), and the rear riser (2E) on their side end faces; the front mold base (5A) is also provided with a discharge groove corresponding to the sprue (2B); the number of chill assemblies is three, namely the front chill (8) provided on the front mold base (5A), the middle chill on the middle mold base (5B), and the front chill (8) provided on the middle mold base (5B). (9) and the rear chill (10) on the rear mold base (5C); a positioning slot is opened on the end position of the front mold base (5A) and the middle mold base (5B) opposite to the front riser (2C) and the middle riser (2D); the front chill (8) and the middle chill (9) are set at the positioning slot, and the rear chill (10) is set at the tail of the inner cavity of the rear mold base (5C); the forming rib ventilation groove (5D) is set on the outer shell mold base (5) at the position corresponding to the upper rib plate of the shell to be formed; the forming rib ventilation groove (5D) is a strip-shaped groove structure with a wide upper side and a narrow lower side, and the width of the groove connected to the inner cavity of the outer shell mold base (5) does not exceed 0.2mm.

2. The casting mold for an oil collecting shell according to claim 1, characterized in that: A connecting hole is provided at a diagonal position on the rear seat (1) and the front seat (2); the rear seat (1) and the front seat (2) are connected by a functional rod (6) provided at the connecting hole.

3. The casting mold for an oil collecting shell according to claim 1, characterized in that: A pre-rise (2F) is also provided on the front seat (2) between the gating (2B) and the front riser (2C). The pre-rise (2F) and the second strip-shaped through hole (2A) are connected only on the middle inlet side; the front riser (2C), the middle riser (2D) and the rear riser (2E) are all funnel-shaped channels that are smaller on one side and larger on the other side connected to the second strip-shaped through hole (2A).

4. The casting mold for an oil collecting shell according to claim 1, characterized in that: Positioning slots are also provided on the front seat (2) at positions corresponding to the front chill (8) and the middle chill (9), and assembly holes are opened on the positioning slots of the front seat (2) and the front chill (8) and the middle chill (9); the front mold base (5A) and the middle mold base (5B) are detachably installed on the front seat (2) through the assembly holes on the front chill (8) and the middle chill (9) and the corresponding connecting parts.

5. A method of using a casting mold for an oil collecting shell according to any one of claims 1 to 4, characterized in that: Includes the following steps: S1. The inner cavity mold (4) and the positioning block (3) are connected and fixed by the vent plug (7), and the assembled component is installed on the first strip through hole (1A) of the rear seat (1); S2. Install the front chill (8) and the middle chill (9) on the positioning slots of the front mold base (5A) and the middle mold base (5B), and then install the rear chill (10) into the rear mold base (5C). After that, place the front mold base (5A) and the middle mold base (5B) on the second through hole (2A) of the front base (2), and connect the front chill (8) and the middle chill (9) to the front base (2) through the hole-shaft fit. After that, insert the rear mold base (5C) into the remaining mounting position of the second through hole (2A). S3. Connect the front seat (2) and the rear seat (1) through the functional rod (6) so that the riser faces upward; S4. After the connection is completed, feed material from the inlet of the gating system (2B) to cast the shell. S5. Once the shell is fully formed, proceed with the demolding process.

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