Automatic centering device

Abstract

The utility model discloses an automatic centering device, and relates to the technical field of mold machining, the automatic centering device comprises a base and a sliding seat, the sliding seat can slide in the direction close to or away from the base, the base is connected with a calibration seat in a sliding mode, the calibration seat is connected with a lower mold, the sliding seat is connected with an upper mold and a stop block, and the stop block is connected with the calibration seat. The upper die is provided with a check block, the check block is used for abutting against and covering one side of a wheel core, the upper die is provided with a positioning groove, the positioning groove is used for being matched with the lower die, the upper die is provided with a guide face, and the guide face is used for abutting against the lower die and guiding the lower die to slide. The wheel core is installed in the upper die, the sliding base slides in the direction close to the base, and even if the upper die and the lower die are not coaxial, in the moving process of the sliding base, the guide face abuts against the outer surface of the lower die and drives the lower die and the calibration base to move, so that the lower die is guided to be clamped into the positioning groove, it is guaranteed that the lower die and the upper die are coaxial, and the machining precision is improved. The forming effect of the outer ring is improved.

Description

Technical Field

[0001] This application relates to the technical field of mold processing, and in particular to an automatic centering device. Background Technology

[0002] A casting mold is a special tool used in the casting process. It is formed by injecting molten plastic into the mold cavity under high pressure, and then cooling and solidifying it to form a plastic product of a specific shape.

[0003] like Figure 1 As shown, a mold for casting pulleys involves placing a formed wheel core 7, which has through holes 71, onto a lower mold. The upper and lower molds are then closed, and liquid material is poured into the cavity surrounding the wheel core 7. After solidification, an outer ring is formed on the outer wall of the wheel core 7. In existing pulley casting molds, due to machining errors, installation deviations, and other reasons, misalignment between the upper and lower molds is common during the mold-closing process. This misalignment results in uneven distribution of the cavity space around the wheel core, affecting the forming effect of the outer ring, and requires improvement. Utility Model Content

[0004] The purpose of this application is to provide an automatic centering device to make the upper mold and the lower mold coaxial.

[0005] The automatic centering device provided in this application adopts the following technical solution: it includes a base and a sliding seat, the sliding seat can slide towards or away from the base, the base is slidably connected to a calibration seat, the calibration seat is connected to a lower mold, the sliding seat is connected to an upper mold and a stop block, the stop block is used to abut and cover one side of the wheel core, the upper mold is provided with a positioning groove, the positioning groove is used to cooperate with the lower mold, the upper mold is provided with a guide surface, the guide surface is used to abut with the lower mold and guide the lower mold to slide.

[0006] By adopting the above technical solution, the wheel core is installed in the upper mold, and the sliding seat slides towards the base. Even if there is a misalignment between the upper and lower molds, the guide surface of the sliding seat abuts against the outer surface of the lower mold during movement, driving the lower mold and the calibration seat to move. This guides the lower mold into the positioning groove, ensuring that the lower mold and the upper mold are coaxial and improving the forming effect of the outer ring. When the lower mold is inserted into the positioning groove, the stop block abuts against and covers one side of the wheel core, which not only improves the stability of the wheel core installed on the lower mold but also prevents liquid from entering the wheel core from the side.

[0007] Optionally, the base is connected to a connecting seat, the connecting seat is equipped with a plurality of balls, the connecting seat is provided with an annular groove, all the balls are located in the annular groove, and the balls abut against the calibration seat.

[0008] By adopting the above technical solution, the ball bearings can reduce the friction between the calibration seat and the connecting seat, allowing the calibration seat to move more smoothly during the calibration process, that is, the lower mold can move more smoothly during the calibration process. The ball bearings are located in the annular groove, and the inner wall of the annular groove restricts the rolling of the ball bearings, preventing the ball bearings from detaching from the connecting seat during rolling.

[0009] Optionally, the calibration seat is provided with a limiting ring portion, the limiting ring portion surrounding the connecting seat, and the limiting ring portion being used to abut against the connecting seat.

[0010] By adopting the above technical solution, the limiting ring restricts the horizontal movement range of the calibration seat, preventing the calibration seat and the lower mold from detaching from the connecting seat during movement.

[0011] Optionally, the limiting ring portion is connected to the limiting rod, and the outer surface of the connecting seat is provided with an abutting ring portion, the abutting ring portion being located between the calibration seat and the limiting rod, and the limiting rod being used to abut against the abutting ring portion.

[0012] By adopting the above technical solution, the cooperation between the limiting rod and the abutment ring restricts the vertical movement range of the calibration seat, preventing the calibration seat and the lower mold from detaching from the connecting seat during movement.

[0013] Optionally, a plurality of the limiting rods are connected to the limiting ring portion, and the plurality of the limiting rods are distributed around the axis of the limiting ring portion.

[0014] By adopting the above technical solution, multiple limiting rods are distributed around the axis of the limiting ring, making the limiting effect more uniform and stable, and preventing the calibration seat and the lower mold from detaching from the connecting seat during movement.

[0015] Optionally, the limiting rod is threadedly connected to the limiting ring.

[0016] By adopting the above technical solution, rotating the limiting rod causes the limiting ring to separate, and the limiting rod can no longer abut against the abutting ring. This allows the calibration seat and the lower mold to be removed from the connecting seat, exposing the balls and facilitating the replacement of damaged balls.

[0017] Optionally, the closest distance between the limiting ring and the abutting ring is less than the closest distance between the limiting rod and the connecting seat.

[0018] By adopting the above technical solution, the limiting rod is prevented from contacting the connecting seat during movement, that is, the limiting rod is prevented from restricting the movement range of the calibration seat.

[0019] Optionally, the farthest distance from the side of the limiting rod closest to the connecting seat to the connecting seat is less than the farthest distance between the abutting ring and the connecting seat.

[0020] By adopting the above technical solution, the limiting rod is prevented from disengaging from the gap between the limiting ring and the abutting ring during the movement, that is, the calibration seat and the lower mold are prevented from disengaging from the connecting seat during the movement.

[0021] Optionally, the lower mold is provided with a positioning part, which is used to cooperate with the through hole of the wheel core.

[0022] By adopting the above technical solution, when installing the wheel core, the positioning part is inserted into the through hole of the wheel core, and the outer surface of the positioning part abuts against the inner wall of the through hole. The positioning part restricts the horizontal movement of the wheel core, so that the wheel core is accurately installed on the lower mold, thereby improving the stability of the wheel core installed on the lower mold.

[0023] Optionally, the outer surface of the stop block is provided with a guide ring surface, and the radius of the stop block gradually increases towards the lower mold.

[0024] By adopting the above technical solution, the guide ring faces the flow of liquid during the pouring process, allowing the liquid to flow smoothly into the upper and lower molds.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The wheel core is installed in the upper mold, and the sliding seat slides towards the base. Even if there is a misalignment between the upper mold and the lower mold, the guide surface of the sliding seat abuts against the outer surface of the lower mold and drives the lower mold and the calibration seat to move during the movement, thereby guiding the lower mold to be inserted into the positioning groove, ensuring that the lower mold and the upper mold are coaxial and improving the forming effect of the outer ring.

[0027] 2. The ball bearings reduce the friction between the calibration seat and the connecting seat, allowing the calibration seat to move more smoothly during the calibration process, meaning the lower mold can move more smoothly during calibration. The ball bearings are located in the annular groove, and the inner wall of the annular groove restricts the rolling of the ball bearings, preventing them from detaching from the connecting seat during rolling. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of the wheel core.

[0029] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0030] Figure 3 yes Figure 2 A sectional view.

[0031] Figure 4 yes Figure 3 An enlarged view of region A.

[0032] Figure 5This is a cross-sectional view of an embodiment of this application and a wheel core.

[0033] Explanation of reference numerals in the attached drawings: 1. Base; 2. Sliding seat; 21. Upper mold; 211. Positioning groove; 212. Guide surface; 213. Injection hole; 22. Stop block; 221. Guide ring surface; 3. Connecting seat; 31. Ring groove; 32. Abutting ring; 4. Ball bearing; 5. Calibration seat; 51. Limiting ring; 52. Limiting rod; 6. Lower mold; 61. Positioning part; 7. Wheel core; 71. Through hole. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 2 -Appendix Figure 5 This application will be described in further detail.

[0035] This application discloses an automatic centering device.

[0036] Combination Figure 2 , Figure 3 and Figure 4 As shown, the system includes a base 1 and a sliding seat 2. The sliding seat 2 can slide towards or away from the base 1. A cylinder (not shown in the attached diagram) is connected to the external side of the sliding seat 2, and the sliding seat 2 is fixedly connected to the output end of the cylinder. A connecting seat 3 is bolted to the side of the base 1 closest to the sliding seat 2. Several balls 4 are mounted on the connecting seat 3 away from the base 1. An annular groove 31 is formed on the side of the connecting seat 3 away from the base 1, and all the balls 4 are located within the annular groove 31, with a portion of the balls 4 protruding from the annular groove 31. A calibration seat 5 is slidably connected to the side of the connecting seat 3 away from the base 1, and each ball 4 abuts against the side of the calibration seat 5 closest to the base 1. A limiting ring 51 is provided on the side of the calibration seat 5 near the base 1. The limiting ring 51 is integrally formed with the calibration seat 5 and surrounds the connecting seat 3. An abutting ring 32 is provided on the outer peripheral surface of the connecting seat 3. The abutting ring 32 is located at the end of the connecting seat 3 away from the base 1. The limiting ring 51 surrounds the abutting ring 32 and limits the range of horizontal movement of the calibration seat 5.

[0037] Combination Figure 3 and Figure 4 As shown, a plurality of limiting rods 52 are threadedly connected to the limiting ring portion 51, and the limiting rods 52 are distributed around the axis of the limiting ring portion 51. The abutment ring portion 32 is located between the calibration seat 5 and the limiting rods 52. The closest distance between the limiting ring portion 51 and the abutment ring portion 32 is less than the closest distance between the limiting rods 52 and the connecting seat 3, preventing the limiting rods 52 from abutting against the connecting seat 3. The farthest distance from the side of the limiting rods 52 closest to the connecting seat 3 to the connecting seat 3 is less than the farthest distance between the abutment ring portion 32 and the connecting seat 3. When the calibration seat 5 moves vertically, the limiting rods 52 can abut against the abutment ring portion 32, thereby preventing the calibration seat 5 from detaching from the connecting seat 3.

[0038] Combination Figure 4 and Figure 5 As shown, a lower mold 6 is fixedly connected to the side of the calibration seat 5 away from the limiting ring 51. A positioning part 61 is provided inside the lower mold 6, located in the middle of the lower mold 6. The positioning part 61 is integrally formed with the lower mold 6, and the lower mold 6 is used to cooperate with the through hole 71 of the wheel core 7. An upper mold 21 and a stop block 22 are fixedly connected to the sliding seat 2. A positioning groove 211 is provided on the side of the upper mold 21 near the lower mold 6, and the lower mold 6 can be inserted into the positioning groove 211. A guide surface 212 is provided on the side of the upper mold 21 near the lower mold 6. An injection hole 213 is provided on the upper mold 21, and part of the stop block 22 is located in the injection hole 213. A guide ring surface 221 is provided on the outer surface of the stop block 22, and the radius of the stop block 22 gradually increases towards the lower mold 6. After the wheel core 7 is installed in the lower mold 6, the sliding seat 2 slides towards the base 1. Even if there is a misalignment between the upper mold 21 and the lower mold 6, the guide surface 212 abuts against the lower mold 6 and drives the lower mold 6 and the calibration seat 5 to slide, guiding the lower mold 6 into the positioning groove 211. When the lower mold 6 abuts against the inner wall of one side of the positioning groove 211, the stop block 22 abuts against the wheel core 7 and covers one side of the wheel core 7, which can fix the position of the wheel core 7 and prevent the pouring liquid from entering the wheel core 7 through the side of the wheel core 7.

[0039] The implementation principle of an automatic centering device according to an embodiment of this application is as follows:

[0040] The wheel core 7 is installed in the lower mold 6, and the through hole 71 of the wheel core 7 is engaged with the positioning part 61 to initially position the wheel core 7. The sliding seat 2 slides towards the base 1. Even if there is a misalignment between the upper mold 21 and the lower mold 6, the guide surface 212 abuts against the lower mold 6 and drives the lower mold 6 and the calibration seat 5 to slide, guiding the lower mold 6 into the positioning groove 211. When the lower mold 6 abuts against the inner wall of one side of the positioning groove 211, the stop block 22 abuts against the wheel core 7 and covers one side of the wheel core 7, which can fix the position of the wheel core 7 and prevent the pouring liquid from entering the wheel core 7 through the side of the wheel core 7. The pouring liquid is injected into the lower mold 6 and the upper mold through the injection hole 213, thereby realizing the forming of the outer ring.

[0041] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An automatic centering device, characterized in that: Includes a base (1) and a sliding seat (2), the sliding seat (2) being able to slide toward or away from the base (1), the base (1) being slidably connected to a calibration seat (5), the calibration seat (5) being connected to a lower mold (6), the sliding seat (2) being connected to an upper mold (21) and a stop (22), the stop (22) being used to abut and cover one side of the wheel core (7), the upper mold being provided with a positioning groove (211), the positioning groove (211) being used to cooperate with the lower mold (6), the upper mold (21) being provided with a guide surface (212), the guide surface (212) being used to abut with the lower mold (6) and guide the lower mold (6) to slide.

2. The automatic centering device according to claim 1, characterized in that: The base (1) is connected to a connecting seat (3), the connecting seat (3) is equipped with a plurality of balls (4), the connecting seat (3) is provided with an annular groove (31), all the balls (4) are located in the annular groove (31), and the balls (4) abut against the calibration seat (5).

3. The automatic centering device according to claim 2, characterized in that: The calibration seat (5) is provided with a limiting ring (51), which surrounds the connecting seat (3) and is used to abut against the connecting seat (3).

4. The automatic centering device according to claim 3, characterized in that: The limiting ring (51) is connected to the limiting rod (52), and the outer surface of the connecting seat (3) is provided with an abutting ring (32). The abutting ring (32) is located between the calibration seat (5) and the limiting rod (52), and the limiting rod (52) is used to abut against the abutting ring (32).

5. The automatic centering device according to claim 4, characterized in that: A plurality of the limiting rods (52) are connected to the limiting ring (51), and the plurality of the limiting rods (52) are distributed around the axis of the limiting ring (51).

6. The automatic centering device according to claim 4, characterized in that: The limiting rod (52) is threadedly connected to the limiting ring (51).

7. The automatic centering device according to claim 4, characterized in that: The closest distance between the limiting ring (51) and the abutting ring (32) is less than the closest distance between the limiting rod (52) and the connecting seat (3).

8. The automatic centering device according to claim 4, characterized in that: The farthest distance from the side of the limiting rod (52) near the connecting seat (3) to the connecting seat (3) is less than the farthest distance between the abutting ring (32) and the connecting seat (3).

9. The automatic centering device according to claim 1, characterized in that: The lower mold (6) is provided with a positioning part (61), which is used to cooperate with the through hole (71) of the wheel core (7).

10. The automatic centering device according to claim 1, characterized in that: The outer surface of the stop (22) is provided with a guide ring surface (221), and the radius of the stop (22) gradually increases in the direction closer to the lower mold (6).

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