Fender mold adopting two-time ejection demolding

Abstract

The utility model discloses a fender mould adopting secondary ejection demoulding, which relates to the technical field of fender moulds and comprises a lower mould and a forming mould cavity arranged at the top of the lower mould, a lower mould bottom plate is arranged below the lower mould, a central mould core and a surrounding mould core are arranged in the forming mould cavity, and the surrounding mould core is sleeved on the outer side of the central mould core in a sliding mode. Two supporting bases are fixedly arranged between the center mold core and the bottom of the inner wall of the forming mold cavity, vertical rods are fixedly arranged at the two ends of the bottom of the surrounding mold core, the two vertical rods penetrate out of the lower mold and are jointly and fixedly provided with an annular plate, a plurality of push-out holes are formed in the center mold core, and push rods are slidably arranged in the push-out holes in a penetrating mode. The lower ends of the two push rods penetrate out of the lower die and are fixedly provided with transverse plates, and a separation ejection mechanism is arranged between the annular plate and the transverse plates. According to the lower mold provided by the utility model, the surrounding mold core, the central mold core, the push rod, the vertical rod, the annular plate, the transverse plate and the separated ejection mechanism can finish quick demolding of the fender through secondary ejection after the fender is formed, so that the demolding effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fender moulds, in particular to a fender mould adopting secondary ejection demoulding. Background Art

[0002] The fender is part of the car body structure, mainly located between the engine hood and the front bumper, covering and protecting the engine and front suspension system. It plays an important role in absorbing the impact force during a collision, protecting the engine and front structure, and reducing wind resistance. In the production process of the fender, it is necessary to use corresponding casting or injection molds for molding.

[0003] However, during the use of the current injection mold for fenders, part of the fenders are inverted in the cavity, so that when demolding, the multiple ejector pins inside the mold cannot effectively push the fenders out. The operator still needs to intervene to complete the demolding and removal work, which reduces the use effect of the mold.

[0004] Therefore, we proposed a fender mold with secondary ejection demoulding to solve the above problems. Utility Model Content

[0005] In view of the above problems existing in the existing fender mold using secondary ejection demoulding, the present utility model is proposed.

[0006] Therefore, the utility model aims to provide a fender mold with secondary ejection demoulding, which solves the problem that the fender cannot be demoulded and taken out in one time after molding.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A fender mold with secondary ejection demolding comprises a lower mold and a molding cavity opened at the top of the lower mold, a lower mold bottom plate is provided below the lower mold, a central mold core and a surrounding mold core slidably sleeved on the outside of the central mold core are provided in the molding cavity, two support seats are fixedly provided between the central mold core and the bottom of the inner wall of the molding cavity, vertical rods are fixedly provided at both ends of the bottom of the surrounding mold core, two of the vertical rods pass through the lower mold and are jointly fixed with an annular plate, a plurality of ejection holes are opened inside the central mold core, push rods are slidably passed through the ejection holes, the lower ends of the two push rods pass through the lower mold and are fixed with a cross plate, and a separate ejection mechanism is provided between the annular plate and the cross plate.

[0009] Preferably, the separate ejection mechanism includes two symmetrically arranged first screws, the two first screws are rotatably arranged inside the lower mold bottom plate, the bottom of the lower mold bottom plate is connected to a bottom cover, the top of the inner wall of the bottom cover is fixedly provided with a motor, the output end of the motor passes through the bottom cover and the lower mold bottom plate and is fixedly connected to the first screw, the two first screws are threadedly arranged in the annular plate, the top of the lower mold bottom plate is rotatably provided with a second screw, the second screw is rotatably arranged in the cross plate, a cavity is opened inside the lower mold bottom plate, the lower ends of the two first screws are fixedly sleeved with a first synchronous wheel, the outer sides of the two first synchronous wheels are commonly sleeved with a first synchronous belt, and the first synchronous belt is arranged in the cavity.

[0010] Preferably, the lower ends of the rod walls of the first screw rod and the second screw rod are fixedly sleeved with second synchronous wheels, and a second synchronous belt is provided for transmission between the two second synchronous wheels.

[0011] Preferably, the inner wall surrounding the mold core is provided with two symmetrically arranged slide grooves, a slider is slidably arranged in the slide groove, the slider is fixedly connected to the outer wall of the central mold core, and a spring is fixedly arranged between the slider and the inner wall of the slide groove.

[0012] Furthermore, a cover plate is provided at the bottom of the bottom cover, and mounting bolts are threadedly provided between the cover plate and the bottom cover.

[0013] Preferably, the pitch of the second screw rod wall is greater than the pitch of the first screw rod wall.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. The utility model, through the lower mold, surrounding mold core, central mold core, push rod, vertical rod, annular plate, horizontal plate and separate ejection mechanism, can complete the rapid demoulding of the fender through secondary ejection after the fender is formed, thereby improving the demoulding effect.

[0016] 2. The utility model, through the surrounding mold core, central mold core, slide groove, slider and spring, can make the surrounding mold core and the central mold core rebound quickly and move to the original state after being misaligned, so as to ensure the stability of the fender during the molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the first screw and the second screw of the utility model;

[0020] Figure 3 For the utility model Figure 1 A magnified schematic diagram of part A.

[0021] Description of reference numerals:

[0022] 1. Lower mold; 2. Lower mold bottom plate; 3. Center mold core; 4. Surrounding mold core; 5. Support seat; 6. Vertical rod; 7. Ring plate; 8. Push rod; 9. Cross plate; 10. First screw; 11. Bottom cover; 12. Motor; 13. Second screw; 14. First synchronous wheel; 15. First synchronous belt; 16. Second synchronous wheel; 17. Second synchronous belt; 18. Slider; 19. Spring; 20. Cover plate; 21. Mounting bolts. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The utility model embodiment discloses a fender mold adopting secondary ejection demoulding.

[0025] The utility model provides Figure 1-3 A fender mold with secondary ejection demolding shown includes a lower mold 1 and a molding cavity opened at the top of the lower mold 1, a lower mold bottom plate 2 is provided below the lower mold 1, a central mold core 3 and a surrounding mold core 4 slidably sleeved on the outside of the central mold core 3 are provided in the molding cavity, two support seats 5 are fixedly provided between the central mold core 3 and the bottom of the inner wall of the molding cavity, vertical rods 6 are fixedly provided at both ends of the bottom of the surrounding mold core 4, the two vertical rods 6 both pass through the lower mold 1 and are jointly fixed with an annular plate 7, a plurality of ejection holes are provided inside the central mold core 3, a push rod 8 is slidably passed through the ejection holes, the lower ends of the two push rods 8 both pass through the lower mold 1 and are fixed with a cross plate 9, the inner wall of the surrounding mold core 4 is provided with two symmetrically arranged slide grooves, a slider 18 is slidably provided in the slide groove, the slider 18 is fixedly connected to the outer wall of the central mold core 3, and a spring 19 is fixedly provided between the slider 18 and the inner wall of the slide groove.

[0026] Before the fender is prepared, the mold is placed in the injection molding machine. At this time, the upper mold of the mold is connected to the lower mold 1. Then, during the introduction of the molten material, the fender can be formed by the cooperation of the molding cavity, the central mold core 3 and the surrounding mold core 4. After molding, the injection molding machine is opened to separate the upper mold and the lower mold 1. At this time, the annular plate 7 pushes the surrounding mold core 4 through two connecting rods 6, so that the surrounding mold core 4 pushes the workpiece out. Then the cross plate 9 follows the movement and performs a secondary push on the inside of the central mold core 3 through the push rod 8, so as to complete the rapid ejection and demolding of the fender after molding. In this process, the movement speed of the central mold core 3 is faster than that of the surrounding mold core 4, which is convenient for multiple demolding to be carried out stably. At the same time, when the central mold core 3 moves, the slider 18 moves in the slide groove and squeezes the spring 19, so that under the elastic recovery of the spring 19, the surrounding mold core 4 and the central mold core 3 can be stably moved back to their original positions.

[0027] In order to enable the surrounding mold core 4 and the central mold core 3 to move stably and perform the front and rear ejection work, as Figure 1-2 As shown, a separate ejection mechanism is provided between the annular plate 7 and the transverse plate 9, and the separate ejection mechanism includes two symmetrically arranged first screws 10, and the two first screws 10 are both rotatably arranged inside the lower mold bottom plate 2, and the bottom of the lower mold bottom plate 2 is connected with a bottom cover 11, and the bottom cover 11 is provided with a cover plate 20, and a mounting bolt 21 is threadedly passed through the cover plate 20 and the bottom cover 11, and a motor 12 is fixedly provided on the top of the inner wall of the bottom cover 11, and the output end of the motor 12 passes through the bottom cover 11 and the lower mold bottom plate 2 and is fixedly connected to the first screw 10, and the two first screws 10 are threadedly arranged in the annular plate 7, and the lower mold bottom plate 2 is provided with a cover plate 20, and the bottom cover 11 is provided with a cover plate 20, and the cover plate 20 and the bottom cover 11 are provided with a mounting bolt 21, and the top of the inner wall of the bottom cover 11 is fixedly provided with a motor 12, and the output end of the motor 12 passes through the bottom cover 11 and the lower mold bottom plate 2 and is fixedly connected to the first screw 10, and the two first screws 10 are threadedly arranged in the annular plate 7, A second screw 13 is rotatably provided at the top of the mold base plate 2, and the second screw 13 is rotatably provided in the horizontal plate 9. The pitch of the rod wall of the second screw 13 is greater than the pitch of the rod wall of the first screw 10. A cavity is opened inside the lower mold base plate 2, and the lower ends of the two first screws 10 are fixedly sleeved with first synchronous wheels 14, and the outer sides of the two first synchronous wheels 14 are commonly sleeved with a first synchronous belt 15, and the first synchronous belt 15 is provided in the cavity. The lower ends of the rod walls of the first screw 10 and the second screw 13 are fixedly sleeved with second synchronous wheels 16, and a second synchronous belt 17 is transmitted between the two second synchronous wheels 16.

[0028] At the beginning of the demolding work, the motor 12 is started, so that the two first screws 10 rotate simultaneously under the transmission of the first synchronous wheel 14 and the first synchronous belt 15 and drive the annular plate 7 to move, so that the annular plate 7 drives the surrounding mold core 4 to move through the vertical rod 6, and at the same time, under the transmission of the second synchronous wheel 16 and the second synchronous belt 17, the second screw 13 rotates following the first screw 10, and the cross plate 9 drives the push rod 8 to move. Since the pitch of the second screw 13 is larger, the movement speed of the cross plate 9 is greater than that of the annular plate 7 at the same speed. At this time, after the surrounding mold core 4 performs preliminary ejection of the fender, the push rod 8 moves quickly and performs secondary ejection of the fender, thereby completing the stable demolding of the fender and improving the demolding and removal efficiency.

[0029] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A fender mold using secondary ejection demoulding, comprising a lower mold (1) and a molding cavity opened at the top of the lower mold (1), characterized in that: A lower mold bottom plate (2) is provided below the lower mold (1), a central mold core (3) and a surrounding mold core (4) slidably mounted on the outer side of the central mold core (3) are provided in the molding cavity, two support seats (5) are fixedly provided between the central mold core (3) and the bottom of the inner wall of the molding cavity, vertical rods (6) are fixedly provided at both ends of the bottom of the surrounding mold core (4), the two vertical rods (6) both pass through the lower mold (1) and are jointly fixed with an annular plate (7), a plurality of ejection holes are opened inside the central mold core (3), push rods (8) are slidably penetrated in the ejection holes, the lower ends of the two push rods (8) both pass through the lower mold (1) and are fixed with a horizontal plate (9), and a separate ejection mechanism is provided between the annular plate (7) and the horizontal plate (9).

2. The fender mold with secondary ejection demoulding according to claim 1, characterized in that: The separate ejection mechanism comprises two symmetrically arranged first screw rods (10), the two first screw rods (10) are both rotatably arranged inside the lower mold base plate (2), the bottom of the lower mold base plate (2) is connected to a bottom cover (11), the top of the inner wall of the bottom cover (11) is fixedly provided with a motor (12), the output end of the motor (12) passes through the bottom cover (11) and the lower mold base plate (2) and is fixedly connected to the first screw rod (10), the two first screw rods (10) are both threadedly arranged in the annular plate (7), the top of the lower mold base plate (2) is rotatably provided with a second screw rod (13), the second screw rod (13) is rotatably arranged in the transverse plate (9), a cavity is opened inside the lower mold base plate (2), the lower ends of the two first screw rods (10) are both fixedly sleeved with a first synchronous wheel (14), the outer sides of the two first synchronous wheels (14) are commonly sleeved with a first synchronous belt (15), and the first synchronous belt (15) is arranged in the cavity.

3. The fender mold with secondary ejection demoulding according to claim 2, characterized in that: A second synchronous wheel (16) is fixedly sleeved on the lower ends of the rod walls of the first screw rod (10) and the second screw rod (13), and a second synchronous belt (17) is provided for transmission between the two second synchronous wheels (16).

4. The fender mold with secondary ejection demoulding according to claim 1, characterized in that: The inner wall of the surrounding mold core (4) is provided with two symmetrically arranged sliding grooves, a slider (18) is slidably arranged in the sliding groove, the slider (18) is fixedly connected to the outer wall of the central mold core (3), and a spring (19) is fixedly arranged between the slider (18) and the inner wall of the sliding groove.

5. The fender mold with secondary ejection demoulding according to claim 2, characterized in that: The bottom cover of the bottom cover (11) is provided with a cover plate (20), and a mounting bolt (21) is threadedly penetrated between the cover plate (20) and the bottom cover (11).

6. The fender mold with secondary ejection demoulding according to claim 2, characterized in that: The pitch of the wall of the second screw (13) is greater than the pitch of the wall of the first screw (10).

Images