Transformer rectifier mutual inductor injection mold

Abstract

The utility model belongs to the technical field of injection molds, and particularly relates to a transformer rectifier mutual inductor injection mold which comprises an upper mold base, a lower mold base and a top plate which are sequentially arranged from top to bottom, a female mold is arranged on the upper mold base, male molds are respectively arranged on the lower mold base, and an injection molding opening communicated with a mold cavity is formed in the upper mold base. The male die is provided with a flow dividing channel communicating with the discharging end of the injection molding opening, the two ends of the flow dividing channel communicate with die cavities in the two sides of the male die correspondingly, the upper die base presses a top plate downwards, the top plate has the freedom degree of rising in the vertical direction through an ejection driving unit, an ejection block is arranged on the lower die base, and the top plate is connected with the ejection block through a connecting rod. Transverse moving sliding blocks symmetrically arranged on the two sides of the male die are further arranged on the lower die base, the transverse moving sliding blocks have the freedom degree of moving towards the male die by means of a translation driving unit, an annular die cavity is jointly defined by the ejector block, the female die, the male die and the transverse moving sliding blocks, and the die can smoothly demold the mutual inductor shell and improve the product quality of the mutual inductor shell.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molds, and particularly relates to an injection mold for a transformer rectifier mutual inductor. Background Art

[0002] Injection molding is a method in which, at a certain temperature, a plastic material that is completely melted by a screw stirrer is filled into the cavity of an injection mold under high pressure, and after cooling and solidification, a molded product is obtained. This method is suitable for mass production of parts with complex shapes. Currently, there is a housing for a transformer rectifier mutual inductor. The front view of the mutual inductor housing is a cylindrical shape with an I-shaped structure. The traditional injection method is to set the feeding position on the upper end face of the mutual inductor housing. However, the quality requirements for the upper and lower end faces of the mutual inductor housing are relatively high, and burrs are likely to be generated during use after the waste on the upper end face is cut off. Therefore, how to use a mold to produce the mutual inductor housing and smoothly demold it to improve the product quality is an urgent problem for those skilled in the art. Summary of the Utility Model

[0003] In order to solve the problems existing in the above-mentioned prior art, the utility model provides an injection mold for a transformer rectifier mutual inductor, which can smoothly demold the mutual inductor housing and improve the product quality of the mutual inductor housing.

[0004] The specific technical solution adopted by the utility model is as follows:

[0005] An injection mold for a transformer rectifier mutual inductor includes an upper mold base, a lower mold base, and a top plate arranged in sequence from top to bottom. A female mold is arranged on the upper mold base, and a male mold is arranged on the lower mold base. An injection port communicating with the cavity is arranged on the upper mold base. The upper mold base presses down on the top plate, and the top plate has the freedom to rise in the vertical direction by means of an ejection driving unit. The key lies in that a top block is arranged on the lower mold base, the top plate is connected to the top block by means of a connecting rod, and transverse moving sliders symmetrically arranged on both sides of the male mold are also arranged on the lower mold base. The transverse moving sliders have the freedom to move towards the male mold by means of a translation driving unit. The top block, the female mold, the male mold, and the transverse moving sliders jointly enclose an annular cavity.

[0006] The translation driving unit includes a driving block and an inclined guide rod arranged on the upper mold base. The transverse moving slider is provided with an inclined guide hole matching the inclined guide rod, and the driving block and the transverse moving slider form an inclined wedge mechanism.

[0007] A limiting hole is arranged at the lower end of the transverse moving slider, and a spring-loaded pin matching the limiting hole is arranged on the lower mold base.

[0008] A guide chute matching the transverse moving slider is arranged on the top block, and the transverse moving slider is arranged on the top block by means of the guide chute.

[0009] A shunt channel communicating with the discharge end of the injection port is provided on the punch, and both ends of the shunt channel communicate with the mold cavities on both sides of the punch.

[0010] A ejector rod passing through the punch and arranged in a matching manner with the shunt channel is further provided on the top plate.

[0011] The ejection driving unit includes a return spring sleeved on the connecting rod and connected to the lower mold base and the top plate at both ends respectively.

[0012] A positioning protrusion and a positioning groove are arranged in a matching manner on the transverse sliding block, and both the positioning protrusion and the positioning groove are located on both sides of the mutual inductor housing.

[0013] The beneficial effects of the present utility model are:

[0014] In the present utility model, a technical solution of arranging a top block for forming a mold cavity on the lower mold base and connecting the top block to the top plate is adopted. The demolding of the mutual inductor housing is realized by the large-area pushing mode of the top block. Compared with the ejection mode of the ejector pin, the contact area between the ejection mechanism and the lower surface of the mutual inductor housing is effectively increased, and the finished product quality of the mutual inductor housing can be effectively improved. Description of the Drawings

[0015] Figure 1 is a structural schematic diagram of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the mutual inductor housing;

[0017] Figure 3 is a top view of the present utility model;

[0018] Figure 4 is Figure 3 a sectional view taken along A-A in

[0019] Figure 5 is Figure 3 a sectional view taken along B-B in

[0020] Figure 6 is Figure 5 an enlarged view of the partial C in

[0021] Figure 7 is a schematic diagram of the mold opening state of the present utility model;

[0022] In the attached drawings, 1 is the upper die base, 2 is the lower die base, 3 is the top plate, 4 is the female die, 5 is the male die, 6 is the mold cavity, 7 is the injection port, 8 is the connecting rod, 9 is the ejector block, 10 is the transverse moving slider, 11 is the transformer rectifier mutual inductor housing, 12 is the driving block, 13 is the inclined guide rod, 14 is the inclined guide hole, 15 is the limit hole, 16 is the spring ejector pin, 17 is the guide chute, 18 is the shunt channel, 19 is the ejector rod, 20 is the pressing block, 21 is the return spring, 22 is the positioning protrusion, and 23 is the positioning groove. Detailed implementation mode

[0023] The present utility model will be further described below in conjunction with the attached drawings and specific embodiments:

[0024] Specific embodiments are as Figure 1-7 shown. An injection mold for a transformer rectifier mutual inductor includes an upper die base 1, a lower die base 2, and a top plate 3 arranged in sequence from top to bottom. A female die 4 is arranged on the upper die base 1, and male dies 5 are respectively arranged on the lower die base 2. An injection port 7 communicating with the mold cavity 6 is arranged on the upper die base 1. The upper die base 1 presses down on the top plate 3, and the top plate 3 has the freedom to rise in the vertical direction by means of an ejection driving unit. The key is that an ejector block 9 is arranged on the lower die base 2, and the top plate 3 is connected to the ejector block 9 by a connecting rod 8. The connecting rod 8 passes through the lower die base 2 from the top plate 3 and then is connected to the ejector block 9. Transverse moving sliders 10 symmetrically arranged on both sides of the male die 5 are also arranged on the lower die base 2. The transverse moving sliders 10 have the freedom to move towards the male die 5 by means of a translation driving unit. The ejector block 9, the female die 4, the male die 5, and the transverse moving sliders 10 jointly enclose an annular mold cavity 6. The ejector block 9 is sleeved on the male die 5, and the male die 5 and the female die 4 jointly form the cavity of the transformer rectifier mutual inductor housing 11. When the mold is closed, the upper die base 1 drives the female die 4 to descend relative to the lower die base 2, and the translation driving unit drives the transverse moving sliders 10 to translate and approach the male die 5 until the mold is closed to form the mold cavity 6. Subsequently, molten plastic is filled into the mold cavity 6 through the injection port 7. After the plastic cools and solidifies, the upper die base 1 drives the female die 4 to rise relative to the lower die base 2, and the transverse moving sliders 10 retract and separate from the transformer rectifier mutual inductor housing 11. Subsequently, the top plate 3 and the ejector block 9 rise to eject the formed transformer rectifier mutual inductor housing 11 from the male die 5 to complete demolding. The upper surface of the ejector block 9 covers the lower surface of the transformer rectifier mutual inductor housing 11, and the demolding of the transformer rectifier mutual inductor housing 11 is realized in a large-area pushing manner. Compared with the ejector rod ejection method, the contact area between the ejection mechanism and the lower surface of the transformer rectifier mutual inductor housing 11 is effectively increased, and the finished product quality of the transformer rectifier mutual inductor housing 11 can be effectively improved.

[0025] A guide chute 17 matching the transverse moving sliders 10 is arranged on the ejector block 9. The transverse moving sliders 10 are installed on the ejector block 9 by means of the guide chute 17. When the mold is opened, the ejector block 9 drives the transverse moving sliders 10 to rise synchronously. The ejector block 9 lifts the transformer rectifier mutual inductor housing 11 along the male die 5 from the lower end surface of the transformer rectifier mutual inductor housing 11. The ejector block 9 has high strength and is convenient for the demolding of the transformer rectifier mutual inductor housing 11.

[0026] Further, the translation driving unit includes a driving block 12 and an inclined guide rod 13 provided on the upper die base 1. An inclined guide hole 14 matching the inclined guide rod 13 is provided on the transverse sliding block 10. The driving block 12 and the transverse sliding block 10 cooperate to form a wedge mechanism. When the upper die base 1 descends, the driving block 12 generates a force on the transverse sliding block 10 to translate towards the punch 5. When the upper die base 1 ascends, the transverse sliding block 10 retreats to the initial position by means of the cooperation between the inclined guide hole 14 and the inclined guide rod 13 and disengages from the transformer housing 11.

[0027] Wherein, a positioning projection 22 and a positioning groove 23 are provided on the transverse sliding block 10 in a matching manner. The positioning projection 22 and the positioning groove 23 are both located on both sides of the transformer housing 11. Specifically, a positioning projection 22 located on both sides of the transformer housing 11 is provided on one of the transverse sliding blocks 10, and a positioning groove 23 located on both sides of the transformer housing 11 is provided on the other transverse sliding block 10. During the mold closing process, the positioning projection 22 enters the positioning concave die 23 and mates with the positioning concave die 23. With the cooperation of the positioning projection 22 and the positioning groove 23, the two transverse sliding blocks 10 can be accurately buckled. In this embodiment, the positioning projection 22 is a trapezoidal block with inclined surfaces on all four sides. The area of the end of the positioning projection 22 close to the positioning groove 23 is smaller than the area of the end far from the positioning groove 23. The small end of the positioning projection 22 enters the positioning groove 23 first, ensuring that the positioning projection 22 can smoothly enter the positioning groove 23 and cooperate with the positioning groove 23 to form the positioning of the two transverse sliding blocks 10.

[0028] Two limiting holes 15 are provided at the lower end of the transverse sliding block 10 at intervals along the translation direction of the transverse sliding block 10. A spring ejector pin 16 matching the limiting holes 15 is provided on the lower die base 2. Specifically, the spring ejector pin 16 is provided on the top block 9 on the lower die base 2. When the transverse sliding block 10 reaches the working position, one of the limiting holes 15 is aligned with the spring ejector pin 16, and the end of the spring ejector pin 16 pops up and enters the limiting hole 15. When the transverse sliding block 10 retreats under force, the end of the spring ejector pin 16 contracts under the pressure of the transverse sliding block 10 until the transverse sliding block 10 retreats to the initial position. The other limiting hole 15 is aligned with the spring ejector pin 16, and the end of the spring ejector pin 16 pops up and enters this limiting hole 15 to fix the position of the transverse sliding block 10, preventing the transverse sliding block 10 from falling off the top block 9 and ensuring that the driving block 12 and the inclined guide rod 13 on the upper die base 1 can accurately cooperate with the transverse sliding block 10 during the next mold closing process.

[0029] A shunt channel 18 is provided on the punch 5 and is communicated with the discharge end of the injection port 7. The two ends of the shunt channel 18 are respectively penetrated through the mold cavities 6 on both sides of the punch 5. The injection port 7 is coaxially arranged with the punch 5. After the molten plastic enters the shunt channel 18 through the injection port 7, it is evenly poured into the mold cavities 6 on both sides of the punch 5, effectively preventing the transformer housing 11 from deforming during the solidification process and improving the product quality. On the other hand, the plastic residue in the shunt channel 18 is located in the cavity of the transformer housing 11, which is convenient for cutting and prevents burrs from appearing on the outer surface of the transformer housing 11, and the injection position is more reasonable.

[0030] A ejector rod 19 which passes through the punch 5 and is arranged in a matching manner with the shunt channel 18 is further provided on the top plate 3. The ejector rod 19 is coaxially arranged with the punch 5. During demolding, the top plate 3 rises, and the ejector rod 19 pushes the plastic residue at the central position of the shunt channel 18, improving the uniformity of the ejecting material and preventing the plastic residue from being stuck on the punch 5 and affecting the smooth demolding.

[0031] Furthermore, the ejection driving unit includes a return spring 21 sleeved on the connecting rod 8 and connected to the lower die base 2 and the top plate 3 at both ends respectively. The lower die base 2 is installed on the workbench, and a pushing rod for the top plate is also provided on the workbench. When the mold is opened, the pushing rod pushes the top plate 3 to rise, so that the ejector block 9 and the ejector rod 19 push up the transformer housing 11 and the plastic residue in the shunt channel 18 for demolding; the top plate 3 is located between the lower die base 2 and the workbench, and a limiting block is arranged at the lower end of the top plate 3. When the top plate 3 is reset, the limiting block contacts the workbench to limit the top plate 3. Subsequently, the upper die base 1 descends, driving the transverse moving slider 10 to approach the punch 5 to the working position.

[0032] A cover plate located at the upper end of the guide chute 17 is provided on the ejector block 9, and the lower end of the cover plate is attached to the upper end surface of the transverse moving slider 10 to prevent the transverse moving slider 10 from falling off from the guide chute 17; a limiting protrusion 20 is installed on the upper die base 1. When the upper die base 1 completes the mold closing, the limiting protrusion 20 contacts the surface of the cover plate on the ejector block 9 to limit the upper die base 1.

Claims

1. A transformer rectifier mutual inductor injection mold, comprising an upper mold base (1), a lower mold base (2) and a top plate (3) which are arranged in sequence from top to bottom. A female mold (4) is arranged on the upper mold base (1), a male mold (5) is arranged on the lower mold base (2), an injection port (7) communicating with the mold cavity (6) is arranged on the upper mold base (1), the upper mold base (1) presses down on the top plate (3), and the top plate (3) has a degree of freedom to rise in the vertical direction by means of an ejection driving unit. It is characterized in that: A top block (9) is arranged on the lower die base (2). The top plate (3) is connected to the top block (9) by means of a connecting rod (8). Transverse moving sliders (10) symmetrically arranged on both sides of the punch (5) are also arranged on the lower die base (2). The transverse moving sliders (10) have the freedom to move towards the punch (5) by means of a translation driving unit. The top block (9), the female die (4), the punch (5) and the transverse moving sliders (10) together enclose an annular die cavity (6).

2. The injection mold for a transformer rectifier and mutual inductor according to claim 1, characterized in that: The translation driving unit includes a driving block (12) and an inclined guide rod (13) arranged on the upper die base (1). An inclined guide hole (14) matching the inclined guide rod (13) is arranged on the transverse moving slider (10). The driving block (12) and the transverse moving slider (10) are matched to form a wedge mechanism.

3. A transformer rectifier mutual inductor injection mold according to claim 2, characterized in that: A limiting hole (15) is arranged at the lower end of the transverse moving slider (10). A spring ejector pin (16) matching the limiting hole (15) is arranged on the lower die base (2).

4. A transformer rectifier and mutual inductor injection mold according to claim 1, characterized in that: A guide chute (17) matching the transverse moving slider (10) is arranged on the top block (9). The transverse moving slider (10) is arranged on the top block (9) by means of the guide chute (17).

5. A transformer rectifier and mutual inductor injection mold according to claim 1, characterized in that: A flow splitting channel (18) communicating with the discharging end of the injection port (7) is opened on the punch (5). Both ends of the flow splitting channel (18) are communicated with the die cavities (6) on both sides of the punch (5).

6. A transformer rectifier mutual inductor injection mold according to claim 5, characterized in that: A ejector rod (19) passing through the punch (5) and matching the flow splitting channel (18) is also arranged on the top plate (3).

7. A transformer rectifier and mutual inductor injection mold according to claim 1, characterized in that: The ejecting driving unit includes a return spring (21) sleeved on the connecting rod (8) and connected to the lower die base (2) and the top plate (3) at both ends respectively.

8. A transformer rectifier mutual inductor injection mold according to claim 1, characterized in that: A positioning protrusion (22) and a positioning groove (23) are arranged on the transverse moving slider (10) in a matching manner. The positioning protrusion (22) and the positioning groove (23) are both located on both sides of the die cavity (6).

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