Die capable of improving surface performance of motor shell

Abstract

The utility model discloses a mold capable of improving the surface performance of a motor shell, and belongs to the technical field of motor shell molds. The exhaust assembly is arranged on the mold body, residual gas in the closed cavity can be quickly exhausted in the injection molding process through the exhaust assembly, the influence on the surface quality of the motor shell is avoided, the insert is arranged and can slide up and down through the electromagnet, and when the insert moves out of the first communicating hole, the surface quality of the motor shell is improved. Gas in the die body can pass through the first communicating hole, the second communicating hole and the sliding hole and is finally exhausted from the exhaust hole, exhaust is achieved, when the insert is moved into the first communicating hole, the surface of the insert is flush with the die body, the surface of the motor shell can be prevented from being affected and damaged, and therefore the surface quality of the motor shell is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to motor casing mould technical field, concretely relates to a mould that can promote motor casing surface performance. BACKGROUND

[0002] Injection molding is a method of producing industrial products. Products are usually made of rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting. Injection molding machine (referred to as injection machine or injection molding machine) is the main molding equipment for making various shapes of plastic products by using plastic molding mold, and injection molding is realized by injection molding machine and mold.

[0003] In the production of motor casing, the casing with certain shape and volume is formed by injection molding into the mold and then cooling and forming. Because the length of the motor casing is large, the depth of the inner cavity of the mold is also large. During injection molding, the front mold cover plate, the middle mold cavity and the rear mold cover plate are in contact in turn and form a closed chamber. When the liquid is injected from the rear mold to the closed chamber, a certain amount of gas will be left around the front mold cover plate. The existence of gas will affect the surface quality of the injection molded product. In order to reduce the negative impact of the air left in the cavity on the surface quality of the product, a gap of about 0.03mm is ground at the glue sealing position of the front mold cover plate for storing the gas left in the cavity. This exhaust method, because there is no supporting surface on the product near the ground gap, and the gas has large fluidity, it is easy to produce burrs on the product, which makes the injection molded product have burrs. When the product has burrs, it is not easy to demold, and it is easy to pull the product when demolding, and the spraying frequency of the demolding machine is increased. SUMMARY

[0004] The utility model mainly solves the technical problems existing in the prior art, and provides a mould that can promote the surface performance of the motor casing.

[0005] The utility model discloses a kind of moulds of lifting motor shell surface performance, including mould and exhaust component, the mould is equipped with mounting hole and first communication hole, the mounting hole and first communication hole coaxial line arrangement, the exhaust component is equipped in mounting hole, the exhaust component includes mounting seat, the mounting seat is equipped in mounting hole, and is fixedly connected with mould, one sliding hole is equipped in the mounting seat, the center position of the bottom of sliding hole is equipped with second communication hole, the second communication hole and sliding hole are coaxial line arrangement with mounting seat, multiple exhaust holes are obliquely provided on the mounting seat, the exhaust hole is communicated with sliding hole inner wall and mounting seat upper surface, the top of sliding hole is equipped with electromagnet, a sintered filter element is equipped in sliding hole, the sintered filter element is slidably connected in sliding hole, spring is connected between electromagnet and sintered filter element, the upper end of spring is connected on the shell of electromagnet, the lower end of spring is connected in sintered filter element, the top of sintered filter element is equipped with contact rod, the bottom of sintered filter element is connected with a connecting rod, the connecting rod extends to first communication hole through second communication hole, and the bottom of connecting rod is equipped with inlay.

[0006] As preferred, the diameter of the inlay is consistent with the diameter of the first communication hole, and the bottom surface of the inlay is flush with the bottom surface of the mould.

[0007] As preferred, the sintered filter element is made of brass.

[0008] The utility model has the beneficial effect that: by setting the exhaust component on the mould, the exhaust component can quickly discharge the residual gas in the closed chamber during the injection molding process, avoiding affecting the quality of the motor shell surface. By setting the inlay, the inlay can slide up and down using the electromagnet. When the inlay moves out of the first communication hole, the gas in the mould can be discharged through the first communication hole, the second communication hole and the sliding hole, and finally through the exhaust hole, achieving exhaust. When the inlay moves into the first communication hole, the surface of the inlay is flush with the mould, avoiding affecting and damaging the surface of the motor shell, thereby improving the surface quality of the motor shell. BRIEF DESCRIPTION OF DRAWINGS

[0009] Fig. 1 is a structural schematic diagram of the utility model;

[0010] Fig. 2 is a top view structural schematic diagram of the utility model.

[0011] In the figure: 1, mould; 2, mounting hole; 3, first communication hole; 4, mounting seat; 5, sliding hole; 6, second communication hole; 7, exhaust hole; 8, electromagnet; 9, sintered filter element; 10, spring; 11, contact rod; 12, connecting rod; 13, inlay. DETAILED DESCRIPTION

[0012] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0013] Example: A mold that can improve the surface properties of an electric motor housing, such as... Figs. 1-2 As shown, the device includes a mold body 1 and an venting assembly. The mold body 1 has a mounting hole 2 and a first connecting hole 3, which are coaxially arranged. The venting assembly is disposed within the mounting hole 2 and includes a mounting base 4. The mounting base 4 is disposed within the mounting hole 2 and fixedly connected to the mold body 1. The mounting base 4 has a sliding hole 5, and a second connecting hole 6 is located at the center of the bottom of the sliding hole 5. Both the second connecting hole 6 and the sliding hole 5 are coaxially arranged with the mounting base 4. The mounting base 4 has multiple venting holes 7 inclinedly formed, and the venting holes 7 communicate with the inner wall of the sliding hole 5. On the upper surface of the mounting base 4, an electromagnet 8 is provided at the top of the sliding hole 5, and a sintered filter element 9 is provided inside the sliding hole 5. The sintered filter element 9 is slidably connected in the sliding hole 5. A spring 10 is connected between the electromagnet 8 and the sintered filter element 9. The upper end of the spring 10 is connected to the housing of the electromagnet 8, and the lower end of the spring 10 is connected to the sintered filter element 9. A contact rod 11 is provided at the top of the sintered filter element 9, and a connecting rod 12 is connected to the bottom of the sintered filter element 9. The connecting rod 12 extends through the second connecting hole 6 to the first connecting hole 3, and an insert 13 is provided at the bottom of the connecting rod 12.

[0014] The diameter of the insert 13 is the same as the diameter of the first connecting hole 3, and the bottom surface of the insert 13 is flush with the bottom surface of the mold body 1; the sintered filter element 9 is made of brass.

[0015] The principle of this invention is as follows: During the injection molding process, the electromagnet 8 is de-energized and in its original state. At this time, the resistive force is not attracted by the electromagnet 8. Under the action of the spring 10, the sintered filter element 9 is pressed downward by the elastic force of the spring 10, which drives the connecting rod 12 and the insert 13 to move downward, causing the insert 13 to move out of the second connecting hole 6. As the injection plastic gradually flows into the mold cavity, the air remaining in the mold cavity is compressed. At this time, the gas in the mold cavity flows out through the second connecting hole 6, enters the sliding hole 5 through the first connecting hole 3, and passes through the sintered filter element. 9. The mold body 1 is discharged from the vent 7. According to the experiment, the injection volume will be obtained. When the injection volume is gradually reached, the electromagnet 8 is energized to attract the contact rod 11, which drives the connecting rod 12 and the insert 13 to move upward. The insert 13 moves upward to block the second connecting hole 6. At this time, most of the air in the mold cavity is discharged, and only a small amount of air remains. Therefore, it will not affect the molding of the motor housing. The diameter of the insert 13 is the same as the diameter of the first connecting hole 3, and the bottom surface of the insert 13 is flush with the bottom surface of the mold body 1, which can further improve the surface quality of the molding.

[0016] Finally, it should be pointed out that the above embodiments are only more representative examples of the present application. Obviously, the present application is not limited to the above embodiments, but can have many variations. Any simple modification, equivalent change and modification made according to the technical essence of the present application to the above embodiments shall be considered to fall within the protection scope of the present application.

Claims

1. A mold for improving the surface performance of an electrical machine housing, comprising a mold body (1) and a venting assembly, characterized in that: The mold body (1) is provided with a mounting hole (2) and a first communication hole (3), the mounting hole (2) and the first communication hole (3) are coaxial, the exhaust assembly is arranged in the mounting hole (2), the exhaust assembly comprises a mounting seat (4), the mounting seat (4) is arranged in the mounting hole (2) and is fixedly connected with the mold body (1), a sliding hole (5) is arranged in the mounting seat (4), a second communication hole (6) is arranged at the center position of the bottom of the sliding hole (5), the second communication hole (6) and the sliding hole (5) are coaxial with the mounting seat (4), a plurality of exhaust holes (7) are obliquely arranged on the mounting seat (4), the exhaust holes (7) are communicated between the inner wall of the sliding hole (5) and the upper surface of the mounting seat (4), an electromagnet (8) is arranged at the top of the sliding hole (5), a sintered filter core (9) is arranged in the sliding hole (5), the sintered filter core (9) is slidably connected in the sliding hole (5), a spring (10) is connected between the electromagnet (8) and the sintered filter core (9), the upper end of the spring (10) is connected to the shell of the electromagnet (8), the lower end of the spring (10) is connected in the sintered filter core (9), a contact rod (11) is arranged at the top of the sintered filter core (9), a connecting rod (12) is connected to the bottom of the sintered filter core (9), the connecting rod (12) extends through the second communication hole (6) to the first communication hole (3), and the bottom of the connecting rod (12) is provided with an inlay (13).

2. The mold for improving surface properties of an electric motor housing according to claim 1, wherein: The diameter of the inlay (13) is consistent with the diameter of the first communication hole (3), and the bottom surface of the inlay (13) is flush with the bottom surface of the mold body (1).

3. A mold for improving surface properties of an electric motor housing according to claim 2, characterized in that: The sintered filter core (9) is made of brass.

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