Forming die for gearbox shell

Abstract

The utility model relates to a die pouring technology, and aims to solve the problems of lower manual bonding efficiency, high rejection rate, higher labor cost and time cost and the like of the conventional die structure. The forming mold for the gearbox shell comprises a mold A and a mold B, the mold A comprises a mold cavity A, four automatic core-pulling side molds A and a mold core A, the mold core A is arranged in the mold cavity A, and the driving ends of the four automatic core-pulling side molds A abut against the four side faces of the mold core A respectively; the B-piece mold comprises a B-piece mold cavity, four B-piece automatic core-pulling side molds and a B-piece mold core, the B-piece mold core is arranged in the B-piece mold cavity, and the driving ends of the four B-piece automatic core-pulling side molds abut against the four side faces of the B-piece mold core correspondingly; corresponding connecting surfaces on the parting surfaces of the mold core A and the mold core B are planes which are matched with each other; and the outer surfaces of the mold core A and the mold core B are respectively provided with a random cavity pouring gate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a forming die, concretely relates to a kind of for gearbox housing's forming die. BACKGROUND

[0002] The process of lost foam casting is divided into multiple procedures, and the specific process flow is as follows: (1) pre-expanding of beads; (2) forming of mold sample; (3) bonding of mold assembly and gating system; (4) coating of coating layer and drying; (5) molding and pouring. For the gearbox housing product structure, since the structure is relatively complex, the gearbox housing is usually formed into A piece and B piece, and then the mold assembly and bonding are performed.

[0003] As shown in Figure 1 The parting surface of the existing gearbox housing is a plurality of flat surfaces connected to form a plurality of stepped surfaces; during the mold assembly process, glue needs to be applied on the parting surface, and then the two pieces of mold are firmly bonded. If the glue application surface is uneven, the bonding operation difficulty of the two pieces of mold will be increased. The parting surface of the existing gearbox housing has the following disadvantages: ① The mold parting surface is not reasonably arranged. The current mold assembly process is manually performed, the bonding efficiency is low, the bonding area at the stepped part of the parting surface is small, the glue line is prone to cracking, the technical level of the mold assembly operator is high, and the work efficiency is low. Generally, professional operators are required to complete the operation, and the work efficiency is low. ② The bonding seam at the stepped surface is prone to cracking, which causes foreign matters such as coating materials to enter the crack during the coating process, and casting defects such as casting cracks, pores, and the like are easily generated during pouring, which causes air leakage and the like, and the scrap rate is high. ③ After the mold assembly, the inner gate, cross gate, and straight gate with different directions and variable cross sections need to be manually cut and bonded according to the process size of the existing gating system. The consumption of the benzene board auxiliary material generates a large amount of edge scraps, causing serious waste of resources. Manual cutting consumes a lot of time, increases the labor and time costs, the bonding area is large, the consumption of auxiliary materials such as hot melt adhesive is large, the gas generation amount of the hot melt adhesive is large, the risk of generating pore defects in the casting is increased, and the yield is low.

[0004] A Chinese patent with publication number CN107876704B and title of a low-cost large mold assembly casting method is disclosed. By designing a suitable model, one mold assembly is used to cast multiple parts of the casting. Although the manufacturing and processing time can be reduced, the method is not suitable for mold processing of the gearbox housing, and cannot reduce the labor cost, time cost, and production cost of the existing gearbox housing processing technology. SUMMARY

[0005] The utility model aims at solving the problems of unreasonable design of the mold structure of the existing gearbox housing, easy cracking of the glue line, low efficiency of manual bonding, high scrap rate after bonding, high consumption of production resources during mold assembly, high labor cost and time cost, and low yield, and proposes a forming die for gearbox housing.

[0006] To achieve the above object, the technical solution of the utility model is provided as follows:

[0007] A kind of forming die for gearbox housing, including A sheet mould and B sheet mould, the A sheet mould and B sheet mould are adapted to gearbox housing structure after being set module, it is special in that:

[0008] The A sheet mould includes A sheet mould cavity, 4 A sheet automatic core-pulling side mould and A sheet mould core, the A sheet mould core is arranged in A sheet mould cavity, the drive cylinder of the 4 A sheet automatic core-pulling side mould is fixed on the side wall of A sheet mould cavity, and the side mould on the drive end is respectively abutted with the four side surfaces of A sheet mould core;

[0009] The B sheet mould includes B sheet mould cavity, 4 B sheet automatic core-pulling side mould and B sheet mould core, the B sheet mould core is arranged in B sheet mould cavity, the drive cylinder of the 4 B sheet automatic core-pulling side mould is respectively fixed on the four side walls of B sheet mould cavity, and the side mould on the drive end is respectively abutted with the four side surfaces of B sheet mould core;

[0010] The parting surface of the A sheet mould core and B sheet mould core is mutually adapted plane between each corresponding connecting surface;

[0011] The outer surface of the A sheet mould core and B sheet mould core is provided with cavity gate along shape, for glue to flow along cavity gate along shape.

[0012] Further, the cavity gate along shape of the A sheet mould core and B sheet mould core is provided with reinforcing rib inside, for preventing formwork collapse during pouring.

[0013] Further, when the A sheet mould core and B sheet mould core are set module, the connecting surface between each corresponding connecting surface on the parting surface of the A sheet mould core and B sheet mould core is bonded by lost foam set module glue.

[0014] Further, the gate inlet of cavity gate along shape on the A sheet mould core is L-shaped gate inlet along shape symmetrically arranged on the two sides of A sheet mould core, and the gate outlet corresponds to the position of the gate inlet of cavity gate along shape on B sheet mould core.

[0015] Further, the L-shaped gate inlet along shape on the two sides of A sheet mould core is provided with gate cover plate adapted thereto, for sealing cavity gate along shape on the inner surface of A sheet mould core and B sheet mould core.

[0016] Further, the gate cover plate is bonded on the L-shaped gate inlet along shape on the two sides of A sheet mould core by lost foam set module glue.

[0017] The utility model has the advantages of:

[0018] The utility model discloses a forming die for gearbox shell structure is simple, through the design adjustment of the parting surface of A piece mould core and B piece mould core, makes each corresponding connecting surface be the plane of mutual adaptation, effectively reduced the difficulty of the assembly die bonding process, reduced the bonding area and the amount of glue, improved the bonding efficiency of mould, reduced the reject rate of mould, effectively saved the time cost, manpower cost and production cost.

[0019] The utility model discloses a forming die for gearbox shell structure is simple, through the design adjustment of the parting surface of A piece mould core and B piece mould core, makes each corresponding connecting surface be the plane of mutual adaptation, effectively reduced the difficulty of the assembly die bonding process, reduced the bonding area and the amount of glue, improved the bonding efficiency of mould, reduced the reject rate of mould, effectively saved the time cost, manpower cost and production cost.

[0020] The utility model discloses a forming die for gearbox shell structure is simple, through the design adjustment of the parting surface of A piece mould core and B piece mould core, makes each corresponding connecting surface be the plane of mutual adaptation, effectively reduced the difficulty of the assembly die bonding process, reduced the bonding area and the amount of glue, improved the bonding efficiency of mould, reduced the reject rate of mould, effectively saved the time cost, manpower cost and production cost.

[0021] The utility model discloses a forming die for gearbox shell structure is simple, through the design adjustment of the parting surface of A piece mould core and B piece mould core, makes each corresponding connecting surface be the plane of mutual adaptation, effectively reduced the difficulty of the assembly die bonding process, reduced the bonding area and the amount of glue, improved the bonding efficiency of mould, reduced the reject rate of mould, effectively saved the time cost, manpower cost and production cost.

[0022] The utility model discloses a forming die for gearbox shell structure is simple, through the design adjustment of the parting surface of A piece mould core and B piece mould core, makes each corresponding connecting surface be the plane of mutual adaptation, effectively reduced the difficulty of the assembly die bonding process, reduced the bonding area and the amount of glue, improved the bonding efficiency of mould, reduced the reject rate of mould, effectively saved the time cost, manpower cost and production cost. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is the structure schematic drawing of the parting surface in the embodiment of the utility model for gearbox shell forming die;

[0024] Figure 2 It is the structure schematic drawing of the parting surface in the embodiment of the utility model for gearbox shell forming die;

[0025] Figure 3 It is the structure schematic drawing of the parting surface in the embodiment of the utility model for gearbox shell forming die;

[0026] (a) is the perspective drawing of A piece mould;

[0027] (b) is the partial bottom view of figure (a);

[0028] (c) is the section view of figure (b);

[0029] Figure 4 It is the structure schematic drawing of the parting surface in the embodiment of the utility model for gearbox shell forming die;

[0030] (a) is a 3D view of mold B;

[0031] (b) is the top view of Figure (a);

[0032] (c) is a sectional view of Figure (b);

[0033] Figure 5 This is a schematic diagram of the conformal cavity gating system in an embodiment of this utility model;

[0034] Figure 6 This is a schematic diagram of the connection structure between the sprue cover plate and the L-shaped conformal cavity sprue inlet in an embodiment of this utility model;

[0035] Figure label:

[0036] 1-A piece mold, 2-B piece mold, 3-A piece mold cavity, 4-A piece automatic core-pulling side mold, 5-A piece mold core, 6-B piece mold cavity, 7-B piece automatic core-pulling side mold, 8-B piece mold core, 9-Irregular cavity sprue, 10-L-type irregular sprue inlet, 11-Sprue cover plate. Detailed Implementation

[0037] like Figure 2 As shown, a molding die for a gearbox housing includes a mold A 1 and a mold B 2. After assembly, the mold A 1 and mold B 2 are adapted to the structure of the gearbox housing. Figure 3 As shown in (a)-(c), the A-piece mold 1 includes an A-piece mold cavity 3, four A-piece automatic core-pulling side molds 4, and an A-piece mold core 5. The A-piece mold core 5 is disposed inside the A-piece mold cavity 3. The drive cylinders of the four A-piece automatic core-pulling side molds 4 are respectively disposed on the four side walls of the A-piece mold cavity 3, and the side molds on their drive ends abut against the four sides of the A-piece mold core 5. The A-piece mold cavity 3 includes an A-piece upper mold and an A-piece lower mold, and the drive cylinders of the four A-piece automatic core-pulling side molds 4 are respectively disposed on the four side walls of the A-piece upper mold.

[0038] like Figure 4 As shown in (a)-(c), the B-piece mold 2 includes a B-piece mold cavity 6, four B-piece automatic core-pulling side molds 7, and a B-piece mold core 8. The B-piece mold core 8 is disposed inside the B-piece mold cavity 6. The drive cylinders of the four B-piece automatic core-pulling side molds 7 are respectively disposed on the four side walls of the B-piece mold cavity 6, and the side molds on their drive ends abut against the four sides of the B-piece mold core 8. The B-piece mold cavity 6 includes an upper B-piece mold and a lower B-piece mold, and the drive cylinders of the four B-piece automatic core-pulling side molds 7 are respectively disposed on the four side walls of the upper B-piece mold.

[0039] The corresponding connecting surfaces on the parting surfaces of mold core A 5 and mold core B 8 are all mutually compatible planes; such as Figure 5As shown, the outer surfaces of the A-piece mold core 5 and the B-piece mold core 8 are provided with a cavity-following runner 9 for the glue to flow along the cavity-following runner 9, and the cavity-following runner 9 of the A-piece mold core 5 and the B-piece mold core 8 is provided with a reinforcing rib for preventing the mold from collapsing during pouring and ensuring the stability and reliability of the structure of the molding mold; when the A-piece mold core and the B-piece mold core are assembled, the corresponding connecting surfaces on the parting surfaces of the two are bonded by the glue used for the lost foam assembly.

[0040] The runner inlet of the cavity-following runner 9 on the A-piece mold core 5 is an L-shaped cavity-following runner inlet 10 symmetrically arranged on both sides of the A-piece mold core 5, and the runner outlet corresponds to the position of the runner inlet of the cavity-following runner 9 on the B-piece mold core 8, effectively reducing the difficulty of assembly bonding, reducing the bonding area and the amount of glue, improving the bonding efficiency of the mold, reducing the waste rate of the mold, effectively saving the time cost, labor cost and production cost; as Figure 6 As shown, the L-shaped cavity-following runner inlets 10 on both sides of the A-piece mold core 5 are provided with a runner cover plate 11 matched therewith for sealing the cavity-following runner 9 on the inner surfaces of the A-piece mold core 5 and the B-piece mold core 8.

Claims

1. A forming die for a gearbox housing, comprising an A-plate die (1) and a B-plate die (2), which are matched with the structure of the gearbox housing after being assembled, characterized in that: the A-plate die (1) comprises an A-plate die cavity (3), four A-plate automatic core-pulling side molds (4) and an A-plate die core (5), the A-plate die core (5) is arranged in the A-plate die cavity (3), and the driving cylinders of the four A-plate automatic core-pulling side molds (4) are fixed on the side walls of the A-plate die cavity (3), and the side molds on the driving ends thereof abut against four side faces of the A-plate die core (5) respectively; the B-plate die (2) comprises a B-plate die cavity (6), four B-plate automatic core-pulling side molds (7) and a B-plate die core (8), the B-plate die core (8) is arranged in the B-plate die cavity (6), and the driving cylinders of the four B-plate automatic core-pulling side molds (7) are fixed on four side walls of the B-plate die cavity (6) respectively, and the side molds on the driving ends thereof abut against four side faces of the B-plate die core (8) respectively; the connecting faces between each corresponding connecting face on the parting faces of the A-plate die core (5) and the B-plate die core (8) are mutually matched planes; and the outer surfaces of the A-plate die core (5) and the B-plate die core (8) are both provided with a cavity gating system (9) for flowing of the glue along the cavity gating system (9).

2. The forming die for a gearbox housing according to claim 1, characterized in that: the cavity gating system (9) of the A-plate die core (5) and the B-plate die core (8) is both provided with a reinforcing rib for preventing the die cavity from collapsing during pouring.

3. The forming die for a gearbox housing according to claim 2, characterized in that: when the A-plate die core (5) and the B-plate die core (8) are assembled, the connecting faces between each corresponding connecting face on the parting faces of the A-plate die core (5) and the B-plate die core (8) are bonded by lost foam assembly glue.

4. The forming die for a gearbox housing according to claim 3, characterized in that: the gating inlet of the cavity gating system (9) on the A-plate die core (5) is an L-shaped gating inlet (10) symmetrically arranged on both sides of the A-plate die core (5), and the gating outlet thereof corresponds to the position of the gating inlet of the cavity gating system (9) on the B-plate die core (8).

5. The forming die for a gearbox housing according to claim 4, characterized in that: the L-shaped gating inlet (10) on both sides of the A-plate die core (5) is provided with a gating cover plate (11) matched therewith for sealing the cavity gating system (9) on the inner surfaces of the A-plate die core (5) and the B-plate die core (8).

6. The forming die for a gearbox housing according to claim 5, characterized in that: the gating cover plate (11) is bonded on the L-shaped gating inlet (10) on both sides of the A-plate die core (5) by lost foam assembly glue. ​ ​ ​ ​ ​ ​ ​ ​ ​

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