Demoulding auxiliary device for motor rotor cast aluminum mould

Abstract

The utility model provides a demolding auxiliary device for a motor rotor cast aluminum mold, and solves the technical problem that the product and the mold are damaged due to the fact that the product is adhered to the mold during demolding in the prior art. The die assembly comprises an upper die assembly and a lower die assembly, the upper die assembly is fixedly connected with the clamping assembly, and the upper die assembly and the lower die assembly are correspondingly arranged up and down; the clamping assembly comprises a locking annular plate and a middle cylinder, the bottom of the locking annular plate is connected with the middle cylinder through a plurality of fasteners, elastic pieces are arranged on the left side and the right side of each fastener, and the elastic pieces are connected between the locking annular plate and the middle cylinder in an abutting mode. The bottom of the locking annular plate is provided with placing grooves used for placing elastic pieces and installation holes used for installing fasteners, the fastening pieces are evenly distributed along the circumference, each fastener is provided with a head portion, a guide portion and a threaded portion inserted into the middle cylinder, and a guide hole with the height smaller than that of the guide portion is formed in each installation hole. The mold unloading device can be widely applied to the technical field of mold unloading.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of mold stripping, and more particularly to a motor rotor cast aluminum mold stripping auxiliary device. BACKGROUND

[0002] In the die casting industry, molds are the key tools for manufacturing high-quality metal parts. However, during the stripping process, the phenomenon of product sticking to the mold often occurs, which causes the product to be unable to strip normally, which not only affects the production efficiency, but also leads to a decline in product quality.

[0003] The existing Chinese utility model patent with the publication number CN212310808U discloses a motor rotor vertical cast aluminum mold. In order to facilitate stripping, the fan blade forming groove feed flow channel and the balance column forming groove feed flow channel are each provided with a conical slope for auxiliary stripping, and the large end of the conical slope is connected with the fan blade forming groove and the balance column forming groove. The fan blade forming groove feed cavity and the balance column forming groove feed cavity are each provided with a conical slope for auxiliary stripping, and the large end of the conical slope is connected with the die casting melting cup. Although stripping can be achieved, only the removal of the mold is considered during stripping, and the situation of product sticking to the mold during stripping is not considered, which leads to the phenomenon of damage to the product and the mold during stripping. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a motor rotor cast aluminum mold stripping auxiliary device to solve the technical problem of product sticking to the mold during stripping in the prior art, which leads to damage to the product and the mold.

[0005] To achieve the above-mentioned purpose, the embodiments of the present application provide a motor rotor cast aluminum mold stripping auxiliary device, which comprises an upper mold assembly and a lower mold assembly, the upper mold assembly is fixedly connected with a clamping assembly, and the upper mold assembly and the lower mold assembly are arranged in a one-to-one correspondence.

[0006] The clamping assembly comprises a locking ring plate and a middle cylinder, the bottom of the locking ring plate is connected with the middle cylinder through a plurality of fasteners, each fastener is provided with elastic members on the left and right sides, the elastic members abut between the locking ring plate and the middle cylinder, the bottom of the locking ring plate is provided with placement grooves for placing the elastic members and mounting holes for mounting the fasteners, which are uniformly distributed along the circumference, the fastener is provided with a head portion, a guide portion and a threaded portion inserted into the middle cylinder, and the mounting hole is provided with a guide hole with a height less than the guide portion.

[0007] Preferably, the mounting hole is provided with a guide cavity with a height greater than the head portion and located at the top of the guide hole.

[0008] Preferably, the top of the clamping assembly is connected with a moving mechanism.

[0009] Preferably, the moving mechanism comprises a first movable plate, a cushion block, a pressing plate and a fixed ring-shaped plate, the upper side edge of the fixed ring-shaped plate extends outward to form a ring-shaped platform, the ring-shaped platform and the cushion block are clamped by the first movable plate and the pressing plate from top to bottom and are connected and fixed by a first connecting piece.

[0010] Preferably, the height of the cushion block is consistent with the height of the ring-shaped platform.

[0011] Preferably, the upper die assembly comprises an upper die seat, and the bottom of the upper die seat is provided with an upper die.

[0012] Preferably, the lower die assembly comprises a lower die, and the top center of the lower die is provided with a groove, and the groove penetrates the lower die through a sprue.

[0013] Preferably, the fastener is a hexagonal socket head shoulder screw.

[0014] The beneficial effects of the present application are that the present application uses fasteners to connect the locking ring-shaped plate and the middle cylinder, wherein the left and right sides of each fastener are provided with elastic members, the elastic members are used to abut against the locking ring-shaped plate and the middle cylinder, and the elastic members can exert a downward force on the middle cylinder during the ejection process. The bottom of the locking ring-shaped plate is provided with placement grooves for placing the elastic members and mounting holes for mounting the fasteners, the fastener is provided with a head, a guide portion and a threaded portion inserted into the middle cylinder, and the mounting hole is provided with a guide hole with a height less than the guide portion. The present application uses the synergistic effect of the elastic members and the fasteners to perform ejection.

[0015] During ejection, the elastic members provide a downward force on the middle cylinder, and the fasteners move downward under the action of the downward force. Since the height of the guide hole in the mounting hole is less than the height of the guide portion of the fastener, when the fastener moves downward, the part higher than the guide portion will be exposed, the bottom of the locking ring-shaped plate will be separated from the top of the middle cylinder, the inner diameter of the middle cylinder will also increase, and thus the clamping force will decrease, ensuring that the product is not clamped in the upper die during ejection, and that there is no adhesion between the product and the middle cylinder, ensuring smooth ejection of the product, ensuring the quality of the product, and reducing the damage to the mold caused by the adhesion of the product to the mold, prolonging the service life of the mold. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0017] Figure 1 A structure sectional view of a mold closing auxiliary device for a motor rotor cast aluminum mold is provided for an embodiment of the present application.

[0018] Figure 2 A top sectional view of a mold stripping auxiliary device for a motor rotor aluminum casting mold according to an embodiment of the present application;

[0019] Figure 3 A bottom sectional view of a mold stripping auxiliary device for a motor rotor aluminum casting mold according to an embodiment of the present application;

[0020] Figure 4 A distribution diagram of elastic members and fasteners at the bottom of the locking ring-shaped plate in a mold stripping auxiliary device for a motor rotor aluminum casting mold according to an embodiment of the present application;

[0021] Figure 5 An enlarged view of A according to an embodiment of the present application;

[0022] Figure 6 A partial schematic view of A without fasteners according to an embodiment of the present application.

[0023] In the figure: 1. first movable plate; 2. cushion block; 3. pressing plate; 4. first connecting member; 5. second connecting member; 6. elastic member; 7. upper mold base; 8. fixed ring-shaped plate; 9. locking ring-shaped plate; 10. fastener; 11. middle cylinder; 12. upper mold; 13. dummy shaft; 14. rotor lamination; 15. lower mold; 16. lower mold base; 17. sprue; 18. second movable plate; 19. aluminum liquid; 20. placing groove; 21. mounting hole; 22. head; 23. guide portion; 24. threaded portion; 25. guide cavity; 26. guide hole. DETAILED DESCRIPTION

[0024] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction 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.

[0025] Please refer to Figures 1-6 A mold stripping auxiliary device for a motor rotor aluminum casting mold according to an embodiment of the present application comprises an upper mold assembly, a clamping assembly and a lower mold assembly, the clamping assembly is fixedly connected with the upper mold assembly, and the upper mold assembly and the lower mold assembly are arranged in a top-to-bottom correspondence.

[0026] The clamping assembly comprises a locking ring plate 9 and a middle cylinder 11, the bottom of the locking ring plate 9 is connected with the middle cylinder 11 through fasteners 10, both sides of each fastener 10 is provided with an elastic element 6, the elastic element 6 is located between the locking ring plate 9 and the middle cylinder 11, the bottom of the locking ring plate 9 is provided with placement grooves 20 for placing the elastic element 6 and mounting holes 21 for placing the fasteners 10, the fastener 10 is provided with a head 22, a guide part 23 and a threaded part 24 inserted into the middle cylinder 11, the mounting hole 21 is provided with a guide hole 26 with a height less than that of the guide part 23. The elastic element 6 is used to provide force to the middle cylinder 11 when the mold is removed, so that the middle cylinder 11 is separated from the locking ring plate 9, the inner diameter D2 clamped by the middle cylinder 11 is increased, and the mold removal is completed.

[0027] Specifically, the mounting hole 21 is provided with a guide cavity 25 with a height greater than that of the head 22 of the fastener 10 and located at the top of the guide hole 26. When the mold is removed, the guide cavity 25 cooperates with the guide hole 26 to move the guide part 23 of the fastener 10 downward along the direction of the guide hole 26, so that the middle cylinder 11 is separated from the locking ring plate 9. The bottom of the locking ring plate 9 is also provided with a recessed cavity embedded with the top of the middle cylinder 11. The fastener 10 is a hexagonal cylindrical head shoulder screw.

[0028] Further, the top and bottom outer surfaces of the middle cylinder 11 are inwardly collected to form inclined surfaces. The middle cylinder 11 is a split structure, which is a cylindrical structure composed of multiple middle cylinder segments. In this embodiment, the middle cylinder 11 is composed of three middle cylinder segments, and the top of each middle cylinder segment is connected with at least one fastener 10 and abuts against two elastic elements 6. When the mold is removed, the elastic element 6 provides downward force to the top of the middle cylinder 11, and the locking ring plate 9 and the middle cylinder 11 move downward along the guide hole 26 of the guide part 23 of the fastener 10 under the downward force provided by the elastic element 6. Since the height of the guide hole 26 is less than that of the guide part 23, the part higher than the guide part 23 will be exposed during the downward movement, so that the bottom of the locking ring plate is separated from the top of the middle cylinder, and the separation gap is D1, which can be set according to actual conditions. In this embodiment, the separation gap D1 is 2 mm. When the middle cylinder 11 is separated, the inner diameter D2 clamped by the middle cylinder 11 will also increase, so that the rotor core 13 will not be clamped and adhered to the upper mold assembly by the middle cylinder 11, and the product will not be adhered to the middle cylinder, ensuring that the product is smoothly removed from the mold, ensuring the quality of the product, and reducing the damage to the mold caused by the adhesion of the product to the mold, thereby prolonging the service life of the mold.

[0029] Further, the top of the clamping assembly is provided with a moving mechanism, which comprises a first movable plate 1, a cushion block 2, a pressing plate 3 and a fixed ring plate 8 in the die casting machine, the upper side edge of the fixed ring plate 8 extends outward to form a ring table, the ring table and the cushion block 2 are clamped by the first movable plate 1 and the pressing plate 3 from top to bottom and are fixed by the first connecting piece 4. The height of the cushion block 2 is consistent with the height of the ring table, the first movable plate 1 and the pressing plate 3 are balanced by the cushion block 2, and then the ring table is clamped, and the first movable plate 1 and the pressing plate 3 after clamping the ring table are fixed by the first connecting piece 4, which can not only make the moving mechanism more firm, but also ensure the smooth movement of the moving mechanism and improve the moving effect.

[0030] Further, the fixed ring plate 8 is connected with the locking ring plate 9 through the second connecting piece 5, so as to ensure that the fixed ring plate 8 moves with the first movable plate 1 when the die casting machine drives the first movable plate 1 to move up and down, and drives the locking ring plate 9 to move up and down at the same time, so as to realize the up and down movement of the clamping assembly, and then the upper die assembly clamped by the clamping assembly also moves up and down, so as to ensure the smooth movement of the whole upper die assembly.

[0031] The upper die assembly comprises an upper die seat 7, and the bottom of the upper die seat 7 is provided with an upper die 12. The bottom of the upper die 12 is provided with a recess which can be embedded with the top of the rotor punching sheet 14, and the inside of the upper die assembly is provided with a channel which cooperates with the dummy shaft 13, which is a conventional setting and will not be described in detail.

[0032] The lower die assembly comprises a lower die 15 and a lower die seat 16, and the top center of the lower die 15 is provided with a recess which can be embedded with the bottom of the rotor punching sheet 14 and the dummy shaft 13. The bottom of the recess is provided with a sprue 17 which penetrates the lower die 15 and the recess, the outer side of the recess is embedded with the bottom of the middle cylinder 11, and the lower die 15 is surrounded by the lower die seat 16. When the mold is closed, the rotor punching sheet 14 and the middle cylinder 11 are placed in the recess of the lower die 15, and the recess is filled with the bottom of the rotor punching sheet 14 and the middle cylinder 11.

[0033] Working principle: during production, the rotor punching sheet 14 and the dummy shaft 13 are placed on the lower die 15, wherein the rotor punching sheet 14 is sleeved on the dummy shaft 13, then the upper die assembly is driven by the first movable plate 1 in the die casting machine to move downward until the upper die assembly is combined with the lower die assembly. When the mold is closed, the guide part 23 of the fastener 10 installed in the mounting hole 21 of the locking ring plate 9 moves upward along the guide hole 26, and the middle cylinder 11 also moves upward until the top of the middle cylinder 11 is embedded with the recess of the locking ring plate 9, so as to clamp the whole upper die assembly. At the same time, the recess in the lower die 15 is filled with the rotor punching sheet 14 and the middle cylinder 11. Then, the die casting machine pressurizes the molten aluminum 19 placed in the second movable plate 18 through the sprue 17 to be injected into the inside of the rotor punching sheet 14. After pouring, pressure maintaining and cooling forming are carried out, and the mold is removed.

[0034] When the mold is opened, the first movable plate 1 in the die-casting machine drives the upper mold assembly to move upward, at the same time, the middle cylinder 11 and the locking ring plate 9 are separated under the action of the elastic member 6, that is, the guide part 23 of the fastener 10 installed in the mounting hole 21 moves downward along the guide hole 26 to form separation, and the separation size D1 is 2 mm in the embodiment. The top of the middle cylinder 11 moves downward under the action of the movement of the fastener 10, and in the process of movement, the middle cylinder 11 is loosened, the inclined surface of the middle cylinder 11 moves outward along the cavity in the locking ring plate 9 matched with the inclined surface, so that the inner diameter D2 between the middle cylinders 11 increases, the clamping force decreases, the rotor punching sheet 14 is no longer in the clamped state, and the rotor punching sheet 14 is not stuck in the upper mold 12 by the middle cylinder 11, but is smoothly placed in the lower mold 15, and finally the product, that is, the rotor punching sheet after casting aluminum, is taken out, so that the mold opening is completed, and a working cycle is realized.

[0035] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit the same; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalent ones; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. An auxiliary device for demolding aluminum molds for motor rotors, comprising an upper mold assembly and a lower mold assembly, characterized in that: The upper mold assembly is fixedly connected to the clamping assembly, and the upper mold assembly and the lower mold assembly are arranged vertically and vertically in correspondence. The clamping assembly includes a locking annular plate and a middle cylinder. The bottom of the locking annular plate is connected to the middle cylinder by a number of fasteners. Each fastener has elastic elements on its left and right sides. The elastic elements abut against the locking annular plate and the middle cylinder. The bottom of the locking annular plate has placement grooves for placing the elastic elements and mounting holes for installing the fasteners, which are evenly distributed along the circumference. The fastener has a head, a guide portion and a threaded portion for inserting into the middle cylinder. The mounting hole has a guide hole with a height smaller than that of the guide portion.

2. The auxiliary device for demolding aluminum casting molds for motor rotors as described in claim 1, characterized in that, The mounting hole has a guide cavity that is taller than the head and located at the top of the guide hole.

3. The auxiliary device for demolding aluminum casting molds for motor rotors as described in claim 2, characterized in that, A moving mechanism is connected to the top of the locking ring plate.

4. The auxiliary device for demolding aluminum casting molds for motor rotors as described in claim 3, characterized in that, The moving mechanism includes a first movable plate, a pad, a pressure plate, and a fixed annular plate. The upper edge of the fixed annular plate extends outward to form an annular platform. The annular platform and the pad are clamped together by the first movable plate and the pressure plate, and are connected and fixed by a first connecting member.

5. The auxiliary device for demolding aluminum casting molds for motor rotors as described in claim 4, characterized in that, The height of the pad is the same as the height of the annular truncated cone.

6. The auxiliary device for demolding aluminum casting molds for motor rotors as described in claim 2, characterized in that, The upper mold assembly includes an upper mold base, and an upper mold is provided at the bottom of the upper mold base.

7. The auxiliary device for demolding aluminum casting molds for motor rotors as described in claim 2, characterized in that, The lower mold assembly includes a lower mold, and a groove is provided at the center of the top of the lower mold. The groove passes through the lower mold through a gate.

8. A mold release auxiliary device for aluminum casting molds for motor rotors as described in any one of claims 1-7, characterized in that, The fastener is an internal hexagonal head shoulder screw.

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