A thread uncutting die

Abstract

The application discloses a thread stripping mold, which comprises a big slider, a small slider and a main shaft core, is used for forming a product with a threaded structure, the main shaft core is hollow inside and is embedded inside the big slider, and the small slider is embedded inside the main shaft core; a first longitudinal threaded part is arranged on the left end inner wall of the main shaft core, a transverse threaded part and a second longitudinal threaded part are sequentially arranged on the right end outer wall of the main shaft core; a big gear is engagedly connected to the transverse threaded part, the big gear drives the main shaft core to rotate through a driving mechanism; a sleeve is threadedly connected to the second longitudinal threaded part, and the sleeve is fixedly connected with the big slider and the small slider through a fixing block. The thread stripping mold can strip the thread structure of a liquid injection port and simultaneously strip the reverse buckling and the ear structure inside the liquid injection port, has a clever structure design, simplifies the mold structure, improves the demolding speed and work efficiency.

Description

A type of unscrewing mold Technical Field

[0001] This invention relates to the field of injection mold technology, and more specifically to a thread-removing mold. Background Technology

[0002] Traditionally, the filling port of an automotive coolant reservoir is located at the top of the product. The threads are first removed using a descrewing mechanism, and then the mold is opened to release the internal undercut of the filling port. However, the existing filling port is located on the side of the product, with a hanging lug structure above it, as shown in Figure 1. This makes it impossible to release the filling port smoothly during mold opening. Therefore, there is an urgent need to design a mold that can simultaneously release both the internal undercut and the hanging lug structure of the filling port. Summary of the Invention

[0003] In view of the problems existing in the prior art, the present invention proposes a thread-removing mold, which is reasonably designed, overcomes the shortcomings of the prior art, and has good effect.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A descrewing mold includes a large slider, a small slider, and a main shaft core for molding products with threaded structures. The main shaft core is hollow and embedded inside the large slider, and the small slider is embedded inside the main shaft core. The inner wall of the left end of the main shaft core has a first threaded portion, and the outer wall of the right end has external teeth and a second threaded portion in sequence. The external teeth are meshed with a large gear, which drives the main shaft core to rotate through a drive mechanism. A sleeve is threadedly connected to the second threaded portion, and the sleeve is fixedly connected to the large slider and the small slider through a fixing block.

[0006] Furthermore, the fixing block includes a first fixing block and a second fixing block, the first fixing block being fixedly connected to the sleeve and having a through hole inside.

[0007] Furthermore, the right end of the small slider passes through the through hole of the first fixing block and is fixedly connected to the second fixing block, and the main shaft core can move to the right into the through hole of the first fixing block under the drive of the large gear.

[0008] Furthermore, the thread pitch of the first threaded portion and the second threaded portion of the spindle core is the same.

[0009] Furthermore, the driving mechanism includes a pinion, a rack, and a first hydraulic cylinder. The pinion is meshed with a large gear and a rack. The rack is fixedly connected to the first hydraulic cylinder. The first hydraulic cylinder is used to drive the rack to move, the rack drives the pinion to rotate, and the pinion drives the large gear to rotate.

[0010] Furthermore, the large slider is fixedly connected to a second hydraulic cylinder, which is used to drive the large slider to move to the right.

[0011] The beneficial technical effects of this invention are as follows:

[0012] The present invention proposes a thread-removing mold that, after removing the threaded structure of the injection port, can simultaneously detach from the undercut and lug structures inside the injection port. The ingenious structural design simplifies the mold structure, improves demolding speed, and increases work efficiency. Attached Figure Description

[0013] Figure 1 is a schematic diagram of the product structure in this invention;

[0014] Figure 2 is a schematic diagram of a thread-removing mold according to the present invention;

[0015] Figure 3 is a schematic diagram of the structure of the large slider, the small slider, and the main shaft core in this invention;

[0016] Figure 4 is a schematic diagram of the main shaft core in this invention;

[0017] Figure 5 is a schematic diagram of the structure of the main spindle core, sleeve and fixing block in this invention;

[0018] Figure 6 is a cross-sectional view of Figure 5;

[0019] Figure 7 is a schematic diagram of the sleeve in this invention;

[0020] Figure 8 is a schematic diagram of the structure of the first fixing block in this invention;

[0021] Figure 9 is a schematic diagram of the driving structure in this invention;

[0022] Among them, 1-product; 2-threaded structure; 3-backed structure; 4-large slider; 5-small slider; 6-main spindle core; 601-first threaded part; 602-external tooth; 603-second threaded part; 7-large gear; 8-sleeve; 9-first fixing block; 10-second fixing block; 11-through hole; 12-small gear; 13-rack; 14-first hydraulic cylinder; 15-guide sleeve; Detailed Implementation

[0023] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and specific examples:

[0024] A thread-removing mold, as shown in Figures 2 and 3, includes a large slider 4, a small slider 5, and a main shaft core 6, used to form product 1, namely an automotive coolant. The main shaft core 6 is cylindrical and hollow inside. The small slider 5 is cylindrical and embedded inside the main shaft core 6. The inner wall of the left end of the main shaft core 6 is provided with a first threaded part 601. The main shaft core 6 and the small slider 5 cooperate to form the liquid injection port structure of the coolant, namely the threaded structure 2. The main shaft core 6 is horizontally embedded in the large slider 4. The large slider 4 is used to form the hanging ear structure (i.e., the undercut structure 3) around the liquid injection port and above the liquid injection port. The small slider 5 is fixedly connected to the large slider 4 through a fixing block.

[0025] As shown in Figure 4, the outer wall of the right end of the main shaft core 6 is provided with external teeth 602 and a second threaded part 603 from left to right. The thread direction of the second threaded part 603 and the first threaded part 601 are opposite and the adjacent thread spacing is the same. A guide sleeve 15 is provided in the large slider 4, and the main shaft core 6 passes through the guide sleeve 15 for easy installation and positioning. The bottom end of the large slider 4 is provided with a notch, and the external teeth 602 are meshed with the large gear 7 through the notch. The large gear 7 drives the main shaft core 6 to rotate through the drive mechanism, as shown in Figures 5 and 6. A sleeve 8 is threadedly connected to the second threaded part 603. The inner wall of the sleeve 8 is provided with an internal thread, as shown in Figure 7. The outer wall of the sleeve 8 is provided with an external thread, which is used to mesh with the fixed seat. The fixed seat is fixed on the fixed block, so the sleeve will not rotate. The fixed block includes a first fixed block 9 and a second fixed block 10. The sleeve 8 is fixedly connected to the first fixed block 9, and the right end of the first fixed block 9 is fixedly connected to the second fixed block 10.

[0026] As shown in Figure 8, the first fixing block 9 has a stepped through hole 11 with a diameter that decreases from large to small. The right end of the small slider 5 passes through the through hole 11 and is fixedly connected to the second fixing block 10. The large gear 7 drives the spindle core 6 to rotate, and the spindle core 6 moves to the right into the through hole 11.

[0027] As shown in Figure 9, the driving mechanism includes a pinion 12, a rack 13, and a first hydraulic cylinder 14. The large gear 7 is coaxially connected to the pinion 12. The bottom of the pinion 12 meshes with the rack 13. The rack 13 is fixedly connected to the telescopic rod of the first hydraulic cylinder 14. The first hydraulic cylinder 14 is used to drive the rack 13 to move, thereby the rack 13 drives the pinion 12 to rotate, and the pinion 12 drives the large gear 7 to rotate.

[0028] The large slider 4 is fixedly connected to a second hydraulic cylinder, which is used to drive the large slider 4 to move to the right.

[0029] The specific working process of the mold is as follows: The first hydraulic cylinder 14 starts working, first driving the rack 13 to move, thereby driving the pinion 12 to rotate. The pinion 12 drives the large gear 7 to rotate. The large gear 7 drives the main shaft core 6 to rotate. The main shaft core 6 moves to the right into the through hole 11 of the first fixed block 9 until its left end is completely disengaged from the injection port structure (threaded structure). The first hydraulic cylinder 14 stops working. The second hydraulic cylinder starts working, driving the large slider 4 to move to the right. The large slider 4 drives the main shaft core 6 through the second fixed block 10 and the sleeve 8, and drives the small slider 5 through the first fixed block 9 to move to the right together until it is separated from the product 1. The second hydraulic cylinder stops working.

[0030] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A thread-removing mold, characterized in that, The device includes a large slider, a small slider, and a spindle core, used to form products with threaded structures. The spindle core and the small slider work together to form the filling port structure of the cooling vessel, while the large slider forms the surrounding area and the lug structure above the filling port. The spindle core is hollow and embedded inside the large slider, and the small slider is embedded inside the spindle core. The left inner wall of the spindle core has a first threaded portion, and the right outer wall has external teeth and a second threaded portion. The external teeth mesh with a large gear, which drives the spindle core to rotate via a drive mechanism. A sleeve is threaded onto the threaded portion, and the sleeve is fixedly connected to the large slider and the small slider via a fixing block. The fixing block includes a first fixing block and a second fixing block. The first fixing block is fixedly connected to the sleeve and has a through hole inside. The right end of the first fixing block is fixedly connected to the second fixing block. The right end of the small slider passes through the through hole of the first fixing block and is fixedly connected to the second fixing block. The spindle core can move to the right into the through hole of the first fixing block under the drive of the large gear. The threads of the first threaded portion and the second threaded portion of the spindle core have opposite directions and the adjacent threads have the same spacing.

2. The unscrewing die according to claim 1, characterized in that, The driving mechanism includes a pinion, a rack, and a first hydraulic cylinder. The pinion is meshed with a large gear and a rack. The rack is fixedly connected to the first hydraulic cylinder. The first hydraulic cylinder is used to drive the rack to move, the rack drives the pinion to rotate, and the pinion drives the large gear to rotate.

3. The unscrewing mold according to claim 1, characterized in that, The large slider is fixedly connected to a second hydraulic cylinder, which is used to drive the large slider to move to the right.

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