Sand casting mold tool for motor end cover

Abstract

The utility model belongs to the technical field of automobile accessory manufacturing, and particularly relates to a motor end cover sand mold casting mold tool which comprises a first mold plate and a second mold plate, the first mold plate is provided with two non-transmission end cover lower molds and two transmission end cover lower molds, and the second mold plate is provided with two transmission end cover lower molds. The same first cross gate is arranged between the two non-transmission end cover lower dies and the two transmission end cover lower dies, first feeding heads are fixedly arranged at the two ends of the first cross gate, separating devices are arranged on the two first feeding heads, a ceramic filter screen is arranged at the bottom of the first cross gate, and a second cross gate is arranged at the bottom of the ceramic filter screen. By arranging the exhaust sheet and the exhaust rod, the integral exhaust of the mold can be fast and smooth, the probability that air holes appear in materials is reduced, and by arranging the lower chill part, hot spots at local positions of castings can be eliminated, a temperature field can be balanced, the shrinkage porosity defect of the castings can be eliminated, the surface machining quality of the model can be improved, the rejection rate can be reduced, and the manufacturing cost can be reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile accessory manufacturing, especially to motor end cover sand casting mould tooling. BACKGROUND

[0002] For the automobile generator, the motor end cover plays a vital role, and is designed into two parts, usually installed at both ends of the motor, which can protect the internal components of the motor from the external environment, such as dust, moisture, corrosion and physical damage, so as to prolong the service life of the motor. The motor end cover also provides support and fixation for the rotor and bearing of the motor, so that the stator and rotor maintain a certain gap and can operate stably. The motor end cover also helps the heat dissipation of the motor, maintains the temperature of the motor, prevents overheating, and plays a key role in protecting the motor, maintaining its normal operation and prolonging its service life. The motor end cover is formed by die casting.

[0003] However, the existing casting mold has the problems of surface shrinkage and internal shrinkage and porosity after production, and the end cover has a high scrap rate. Therefore, the motor end cover sand casting mold tooling is proposed. SUMMARY

[0004] The utility model discloses a motor end cover sand casting mold tooling which is proposed to solve the problems in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: the motor end cover sand casting mold tooling comprises a first mold plate and a second mold plate, the first mold plate is provided with two non-drive end cover lower molds and two drive end cover lower molds, a first cross runner is arranged between the two non-drive end cover lower molds and the two drive end cover lower molds, first feeding risers are fixedly arranged at both ends of the first cross runner, separation devices are arranged on the two first feeding risers, a ceramic filter screen is arranged at the bottom of the first cross runner, the second mold plate is provided with two non-drive end cover upper molds and a drive end cover upper mold, an exhaust fin is arranged between the two groups of non-drive end cover upper molds and drive end cover upper molds, exhaust rods are arranged at the top of the two exhaust fins, a second cross runner is arranged between the two non-drive end cover upper molds and the drive end cover upper mold, a sprue cup is fixedly arranged on the second cross runner, lap runners are arranged at both ends of the second cross runner, and second feeding risers are arranged at the top of the two lap runners.

[0006] Further description of the above technical scheme:

[0007] The top of each of the two drive end cover lower molds and the two non-drive end cover lower molds is provided with a lower chill part.

[0008] As a further description of the above technical solutions:

[0009] The non-drive end cover lower die, the drive end cover lower die, the first cross runner and the first mold plate are movably connected, and the non-drive end cover upper die, the drive end cover upper die, the second cross runner and the second mold plate are movably connected.

[0010] As a further description of the above technical solutions:

[0011] A plurality of fixing pins for fixing are arranged between the non-drive end cover lower die and the first mold plate, and a plurality of fixing pins for fixing are arranged between the non-drive end cover upper die and the second mold plate.

[0012] As a further description of the above technical solutions:

[0013] The two non-drive end cover lower dies and the two non-drive end cover upper dies are matched, and the two drive end cover lower dies and the two drive end cover upper dies are matched.

[0014] The utility model has the advantages of the following beneficial effects:

[0015] 1. Compared with the prior art, the motor end cover sand casting mold tooling can make the overall exhaust of the mold quick and smooth, reduce the probability of pores in the material, eliminate the hot spot of the local position of the casting, balance the temperature field, eliminate the casting shrinkage defect, improve the model surface processing quality, reduce the scrap rate, and reduce the production cost.

[0016] 2. Compared with the prior art, the motor end cover sand casting mold tooling can make the overall exhaust of the mold quick and smooth, reduce the probability of pores in the material, eliminate the hot spot of the local position of the casting, balance the temperature field, eliminate the casting shrinkage defect, improve the model surface processing quality, reduce the scrap rate, and reduce the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 The utility model discloses a lower mold plane structure schematic diagram of motor end cover sand casting mold tooling is provided for the utility model.

[0018] Fig. 2 The utility model discloses a lower mold plane structure schematic diagram of motor end cover sand casting mold tooling is provided for the utility model.

[0019] Fig. 3 The utility model discloses a lower mold plane structure schematic diagram of motor end cover sand casting mold tooling is provided for the utility model.

[0020] Fig. 4The utility model provides a motor end cover sand mould casting die frock's upper die solid structure schematic diagram.

[0021] Legend:

[0022] 1, first pattern plate; 2, second pattern plate; 3, non-drive end cover lower mould; 4, drive end cover lower mould; 5, first cross gate; 6, first feeding head; 7, separating device; 8, lower chill part; 9, ceramic filter screen; 10, non-drive end cover upper mould; 11, drive end cover upper mould; 12, second cross gate; 13, exhaust fin; 14, exhaust rod; 15, sprue cup; 16, lap gate; 17, second feeding head. DETAILED DESCRIPTION

[0023] The technical scheme in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the utility model.

[0024] Reference Figs. 1 to 4 The motor end cover sand mould casting die frock provided by the utility model includes a first pattern plate 1 and a second pattern plate 2, two non-drive end cover lower moulds 3 and two drive end cover lower moulds 4 are arranged on the first pattern plate 1, a plurality of fixing pins for fixing are arranged between the non-drive end cover lower mould 3 and the drive end cover lower mould 4 and the first pattern plate 1, a same first cross gate 5 is arranged between the two non-drive end cover lower moulds 3 and the two drive end cover lower moulds 4, the non-drive end cover lower mould 3, the drive end cover lower mould 4, the first cross gate 5 and the first pattern plate 1 are movably connected, the two ends of the first cross gate 5 are fixedly provided with first feeding heads 6, the two first feeding heads 6 are provided with separating devices 7, the bottom of the first cross gate 5 is provided with a ceramic filter screen 9, two non-drive end cover upper moulds 10 and drive end cover upper moulds 11 are arranged on the second pattern plate 2, the two non-drive end cover lower moulds 3 and the two non-drive end cover upper moulds 10 are matched, the two drive end cover lower moulds 4 and the two drive end cover upper moulds 11 are matched, a plurality of fixing pins for fixing are arranged between the non-drive end cover upper mould 10 and the drive end cover upper mould 11 and the second pattern plate 2, a same second cross gate 12 is arranged between the two non-drive end cover upper moulds 10 and the two drive end cover upper moulds 11, the non-drive end cover upper mould 10, the drive end cover upper mould 11, the second cross gate 12 and the second pattern plate 2 are movably connected, the second cross gate 12 is fixedly provided with a sprue cup 15 at the top, the two ends of the second cross gate 12 are provided with lap gates 16, and the top of the two lap gates 16 is provided with second feeding heads 17.

[0025] In order to realize the purpose of reducing air hole, the same exhaust fin 13 is arranged between the two sets of non driving end cover upper die 10 and driving end cover upper die 11, the top of the two exhaust fins 13 is provided with exhaust rod 14, the exhaust fin 13 and exhaust rod 14 can make the overall exhaust of the mold quick and smooth, reduce the probability of air hole in the material;

[0026] In order to realize the purpose of reducing waste rate, the lower chill part 8 is arranged on the top of the two driving end cover lower die 4 and two non driving end cover lower die 3, which can eliminate the hot spot of the local position of the casting, balance the temperature field, eliminate the casting shrinkage defect, improve the model surface processing quality, reduce the waste rate and the manufacturing cost.

[0027] Working principle: when using, the two mold plates are close to each other, and the driving end cover upper die 11, non driving end cover upper die 10 and driving end cover lower die 4, non driving end cover lower die 3 are clamped, then the molten material is introduced into the pouring cup 15 for casting, the setting of the lower chill part 8 can eliminate the hot spot of the local position of the casting, balance the temperature field, eliminate the casting shrinkage defect, improve the model surface processing quality, reduce the waste rate and the manufacturing cost, the combination of exhaust fin 13 and exhaust rod 14 can make the overall exhaust of the mold quick and smooth, reduce the probability of air hole in the material, at the same time, the ceramic filter screen 9 is arranged below the pouring cup 15, and the separation structure 7 is additionally arranged at the end of the gating system feeding riser of the lower die, the overall cooperation does not occupy too much space, the feeding of the hot spot part of the casting is continuous and effective, the internal matrix organization is stable and free of inclusion, the gating system and the casting are separated, which is labor saving and efficient, the overall process yield is high, and the production cost is low.

[0028] Finally, it should be pointed out that: the above only for the preferred embodiments of the utility model, and does not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. An electric machine end cover sand mold casting mold tooling, comprising a first mold plate (1) and a second mold plate (2), characterized in that: The first mold plate (1) is provided with two non-drive end cover lower molds (3) and two drive end cover lower molds (4), a first cross runner (5) is arranged between the two non-drive end cover lower molds (3) and the two drive end cover lower molds (4), the two ends of the first cross runner (5) are fixedly provided with first feeding risers (6), the two first feeding risers (6) are provided with separation devices (7), the bottom of the first cross runner (5) is provided with a ceramic filter screen (9), the second mold plate (2) is provided with two non-drive end cover upper molds (10) and a drive end cover upper mold (11), an exhaust fin (13) is arranged between the two groups of non-drive end cover upper molds (10) and drive end cover upper molds (11), the top of the two exhaust fins (13) is provided with exhaust rods (14), a second cross runner (12) is arranged between the two non-drive end cover upper molds (10) and the drive end cover upper mold (11), the second cross runner (12) is fixedly provided with a sprue cup (15), the two ends of the second cross runner (12) are provided with lap runners (16), and the top of the two lap runners (16) is provided with second feeding risers (17).

2. The electric machine end cover sand mold casting mold tooling of claim 1, wherein: The top of the two drive end cover lower molds (4) and the two non-drive end cover lower molds (3) is provided with a lower chill part (8).

3. The electric machine end cover sand mold casting mold tooling of claim 1, wherein: The non-drive end cover lower mold (3), the drive end cover lower mold (4), the first cross runner (5) and the first mold plate (1) are movably connected, and the non-drive end cover upper mold (10), the drive end cover upper mold (11), the second cross runner (12) and the second mold plate (2) are movably connected.

4. The electric machine end cover sand-charge casting mold tooling of claim 1, wherein: A plurality of fixing pins for fixing are arranged between the non-drive end cover lower mold (3), the drive end cover lower mold (4) and the first mold plate (1), and a plurality of fixing pins for fixing are arranged between the non-drive end cover upper mold (10), the drive end cover upper mold (11) and the second mold plate (2).

5. The electric machine end cap sand-charge casting mold tooling of claim 1, wherein: The two non-drive end cover lower molds (3) and the two non-drive end cover upper molds (10) are matched, and the two drive end cover lower molds (4) and the two drive end cover upper molds (11) are matched.

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