Secondary ejection forced demolding mechanism

Abstract

The utility model discloses a secondary ejection forced demolding mechanism which comprises a fixed mold bottom plate, a runner plate arranged at the lower end of the fixed mold bottom plate, a fixed mold plate arranged at the lower end of the runner plate and a movable mold plate arranged below the fixed mold plate, and a fixed mold core is arranged in the fixed mold plate. A secondary ejection assembly is composed of a secondary ejection rod plate and a secondary ejection rod bottom plate, a primary ejection assembly is composed of a primary ejection rod plate and a primary ejection rod bottom plate, a secondary ejection rod and a sliding block are installed in the secondary ejection assembly, and a primary ejection rod and a hook pin are installed in the primary ejection assembly. The primary ejection assembly and the secondary ejection assembly are locked along with inserting connection of the sliding block and the hook pin, the ejection rod drives the secondary ejection assembly to move, the secondary ejection assembly drives the primary ejection assembly to move at the same time till the sliding block is separated from the hook pin after the wedge-shaped block and the sliding block are connected in an inserted mode, and at the moment, the primary ejection assembly is separated from a product. And the secondary ejection assembly continues to eject, so that secondary separation of the product with the inverted buckle is realized, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding production, in particular to a secondary ejection strong release mechanism. Background Art

[0002] An injection mold is a tool for producing plastic products. The heated and melted plastic is injected into the mold cavity under high pressure by the injection molding machine. After cooling and solidification, a molded product can be obtained. When using injection molds for injection molding of products, sometimes products with more special structures are encountered. For example, a type of product has a full circle of undercuts inside. The traditional ejector mechanism cannot demould the product and the ejector pin, which affects production efficiency. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a secondary ejection strong release mechanism to solve the problems existing in the above-mentioned background technology.

[0004] A secondary ejection forced release mechanism comprises a fixed mold bottom plate, a flow channel plate installed at the lower end thereof, a fixed mold plate installed at the lower end of the flow channel plate and a movable mold plate arranged below the fixed mold plate, a fixed mold core is installed inside the fixed mold plate, a movable mold core is installed inside the movable mold plate, square irons are fixed on both the front and rear sides of the lower end of the movable mold plate, a movable mold bottom plate is fixed between the lower ends of the square irons, a push rod is installed through the center of the movable mold bottom plate, a primary push rod bottom plate is arranged above the movable mold bottom plate, the push rod and the primary push rod bottom plate are arranged through, a primary push rod plate is fixed to the upper end of the primary push rod bottom plate, the primary push rod plate and the push rod are arranged through, a secondary push rod bottom plate is arranged above the primary push rod plate, and the upper end of the push rod is fixed to the secondary push rod bottom plate by screws, A secondary ejector plate is fixed above the secondary ejector bottom plate, a primary ejector is fixed through the right part of the primary ejector plate, the upper part of the primary ejector passes through the secondary ejector bottom plate and the secondary ejector plate in sequence, the bottom of the primary ejector is abutted against the primary ejector bottom plate, a secondary ejector is fixed through the left part of the secondary ejector plate, the bottom of the secondary ejector is abutted against the secondary ejector bottom plate, the primary ejector and the top of the secondary ejector both pass through the dynamic model core, a hook pin is fixed on the left side of the upper end of the primary ejector bottom plate, the top of the hook pin passes through the primary ejector plate, the secondary ejector bottom plate and the secondary ejector plate in sequence, a slider is elastically connected to the left side of the upper end of the secondary ejector plate, the slider is plug-in matched with the hook pin, and a wedge block plug-in arranged with the slider is fixed on the left side of the lower end of the dynamic template.

[0005] Preferably, the primary ejector plate and the primary ejector bottom plate are fixed by screws.

[0006] Preferably, the secondary ejector plate and the secondary ejector bottom plate are fixed by screws.

[0007] Preferably, the secondary mandrel plate, the secondary mandrel bottom plate, the primary mandrel plate and the primary mandrel bottom plate are all located between the square irons and are slidably connected to the square irons.

[0008] Preferably, the hook pin is fixedly connected to the primary ejector plate, and the hook pin is movably connected to the secondary ejector bottom plate and the secondary ejector plate respectively.

[0009] Preferably, a groove is opened on the left side of the upper end of the secondary ejector plate, the slider is slidably connected inside the groove, and a spring is connected between the left part of the slider and the inner wall of the groove.

[0010] Preferably, the top of the hook pin is located in the groove, and an end of the top of the hook pin close to the sliding block is provided with a hook groove, and the sliding block is plugged into the hook groove.

[0011] Preferably, a center hole is provided in the middle of the slider, the wedge block is plugged into the center hole, the left side of the lower end of the wedge block is an inclined surface, the left end surface above the inner wall of the center hole is an inclined surface, and the inclined surface of the wedge block matches the inclined surface of the center hole.

[0012] Preferably, the inclined surface of the wedge block is provided with an upper rolling groove, an upper ball is rollingly connected inside the upper rolling groove, the inclined surface of the center hole is provided with a lower rolling groove, a lower ball is rollingly connected inside the lower rolling groove, and the lower ball is in contact with the upper ball.

[0013] Preferably, an undercut is provided above the primary ejector rod.

[0014] Beneficial effect: the secondary ejection forced disengagement mechanism comprises a secondary ejector plate and a secondary ejector bottom plate forming a secondary ejector assembly, a primary ejector plate and a primary ejector bottom plate forming a primary ejector assembly, a secondary ejector and a slider are installed in the secondary ejector assembly, a primary ejector and a hook pin are installed in the primary ejector assembly, the primary ejector assembly and the secondary ejector assembly are locked as the slider and the hook pin are plugged in, the ejector bar drives the secondary ejector assembly to move and utilizes the secondary ejector assembly to drive the primary ejector assembly to move at the same time, until the wedge block and the slider are plugged in, so that the slider and the hook pin are separated, at which time the primary ejector assembly is detached from the product, while the secondary ejector assembly continues to eject, so as to realize the secondary detachment of the product with undercut, thereby improving the production efficiency, and in addition, by arranging the lower ball and the upper ball, direct contact between the inclined surfaces can be avoided when the wedge block and the slider are plugged in, so as to reduce the wear of the inclined surfaces and improve the service life of the wedge block and the slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 For this utility model Figure 1 A partial schematic diagram of;

[0017] Figure 3 For this utility model Figure 1 Partial schematic diagram of B.

[0018] In the figure: 1-fixed mold bottom plate, 2-flow channel plate, 3-fixed mold plate, 4-movable mold plate, 5-square iron, 6-secondary ejector plate, 7-secondary ejector bottom plate, 8-primary ejector plate, 9-primary ejector bottom plate, 10-movable mold bottom plate, 11-fixed mold core, 12-movable mold core, 13-primary ejector, 14-secondary ejector, 15-wedge block, 16-slider, 17-hook pin, 18-elevator bar, 19-spring, 20-lower rolling groove, 21-lower ball, 22-upper rolling groove, 23-upper ball. DETAILED DESCRIPTION

[0019] See also Figure 1-Figure 3 A secondary ejection forced release mechanism comprises a fixed mold bottom plate 1, a flow channel plate 2 installed at the lower end thereof, a fixed mold plate 3 installed at the lower end of the flow channel plate 2, and a movable mold plate 4 arranged below the fixed mold plate 3, wherein a fixed mold core 11 is installed inside the fixed mold plate 3, and a movable mold core 12 is installed inside the movable mold plate 4, square irons 5 are fixed on both sides of the lower end of the movable mold plate 4, and a movable mold bottom plate 10 is fixed between the lower ends of the square irons 5, and a push rod 18 is installed through the center of the movable mold bottom plate 10, and a primary push rod bottom plate 9 is arranged above the movable mold bottom plate 10, and the push rod 18 and the primary push rod bottom plate 9 are arranged through, and a primary push rod plate 8 is fixed to the upper end of the primary push rod bottom plate 9, and the primary push rod plate 8 and the primary push rod bottom plate 9 are screwed together. The primary push rod plate 8 and the push rod 18 are intersectingly arranged, a secondary push rod bottom plate 7 is arranged above the primary push rod plate 8, the upper end of the push rod 18 is fixed to the secondary push rod bottom plate 7 by screws, a secondary push rod plate 6 is fixed above the secondary push rod bottom plate 7, and the secondary push rod plate 6 and the secondary push rod bottom plate 7 are fixed by screws, and the secondary push rod plate 6, the secondary push rod bottom plate 7, the primary push rod plate 8 and the primary push rod bottom plate 9 are all located between the square irons 5 and are slidably connected to the square irons 5, when the secondary push rod bottom plate 7, the secondary push rod plate 6, the primary push rod plate 8 and the primary push rod bottom plate 9 move, the secondary push rod bottom plate 7, the secondary push rod plate 6, the primary push rod plate 8 and the primary push rod bottom plate 9 will move in the space between the square irons 5;

[0020] A primary ejector rod 13 is fixedly passed through the right part of the primary ejector rod plate 8, and the upper part of the primary ejector rod 13 passes through the secondary ejector rod bottom plate 7 and the secondary ejector rod plate 6 in sequence, and the bottom of the primary ejector rod 13 abuts against the primary ejector rod bottom plate 9, and a secondary ejector rod 14 is passed through the left part of the secondary ejector rod plate 6, and the bottom of the secondary ejector rod 14 abuts against the secondary ejector rod bottom plate 7, and the tops of the primary ejector rod 13 and the secondary ejector rod 14 both pass through the dynamic model core 12, and a hook pin 17 is fixedly provided on the left side of the upper end of the primary ejector rod bottom plate 9, and the top of the hook pin 17 passes through the primary ejector rod plate 8, the secondary ejector rod bottom plate 7, and the secondary ejector rod plate 6 in sequence, and the hook pin 17 is fixedly connected to the primary ejector rod plate 8, and the hook pin 17 is respectively connected to the secondary ejector rod bottom plate 7. The rod bottom plate 7 and the secondary ejector plate 6 are movably connected, and a slider 16 is elastically connected to the left side of the upper end of the secondary ejector plate 6. A groove is opened on the left side of the upper end of the secondary ejector plate 6, and the slider 16 is slidably connected inside the groove. A spring 19 is connected between the left part of the slider 16 and the inner wall of the groove. The slider 16 is plugged into a hook pin 17. The top of the hook pin 17 is located in the groove. A hook groove is provided at the end of the top of the hook pin 17 close to the slider 16, and the slider 16 is plugged into the hook groove. A wedge block 15 plugged into the slider 16 is fixed to the left side of the lower end of the movable template 4. A center hole is provided in the middle of the slider 16, and the wedge block 15 is plugged into the center hole. The left side of the lower end of the wedge block 15 is Inclined surface, the left end surface above the inner wall of the center hole is an inclined surface, the inclined surface of the wedge block 15 matches the inclined surface of the center hole, and an undercut is provided above the primary ejector rod 13, and the primary ejector rod 13 is buckled with the product, so that when ejection is required, the secondary ejector rod bottom plate 7 is driven to move by the ejector bar 18, and the slider 16 is plugged and matched with the hook pin 17 at this time, so that the secondary ejector rod bottom plate 7, the secondary ejector rod plate 6, the primary ejector rod plate 8 and the primary ejector rod bottom plate 9 can be moved together, so that the primary ejector rod 13 and the secondary ejector rod 14 are ejected at the same time, and when the secondary ejector rod plate 6 moves to the center hole where the wedge block 15 is inserted into the slider 16, the slider 16 is pushed by the inclined surface of the wedge block 15 and the slider 16. The first ejector plate 8 and the second ejector plate 6 are moved upward, and the second ejector plate 6 is moved upward. The second ejector plate 6 is moved upward, and the second ejector plate 6 is moved upward. The first ejector plate 8 and the second ejector plate 6 are moved upward, and the second ejector plate 6 is moved upward. The first ejector plate 13 is moved downward, and the second ejector plate 14 is moved upward. The first ejector plate 13 is moved downward, and the second ejector plate 14 is moved upward. The first ejector plate 13 is moved downward, and the second ejector plate 14 is moved upward. The first ejector plate 13 is moved downward, and the second ejector plate 14 is moved upward. The first ejector plate 13 is moved downward, and the second ejector plate 14 is moved upward. The first ejector plate 13 is moved downward, and the second ejector plate 14 is moved upward. The first ejector plate 13 is moved downward, and the second ejector plate 14 is moved upward. The product is demolded for the second time, thereby realizing the product with undercut and improving the production efficiency. The stroke control is precise, and the stroke can be adjusted according to the actual mold requirements. The production cost is low and the processing is simple.

[0021] The inclined surface of the wedge block 15 is provided with an upper rolling groove 22, and an upper ball 23 is rollingly connected inside the upper rolling groove 22. The inclined surface of the center hole is provided with a lower rolling groove 20, and a lower ball 21 is rollingly connected inside the lower rolling groove 20. The lower ball 21 is in contact with the upper ball 23. By arranging the lower ball 21 on the inclined surface of the center hole and the upper ball 23 on the inclined surface of the wedge block 15, when the wedge block 15 and the center hole of the slider 16 are plugged in, the upper ball 23 and the lower ball 21 can roll, and direct contact between the inclined surfaces can be avoided, thereby reducing the wear of the inclined surfaces and increasing the service life of the wedge block 15 and the slider 16.

[0022] Working principle: After the fixed mold plate 3 and the movable mold plate 4 are molded together, molten material is poured into the fixed mold core 11 and the movable mold core 12. After the material is cooled, a product is formed. When the product needs to be ejected from the mold cavity, because the slider 16 and the hook pin 17 are plugged and matched at this time, when the ejector bar 18 moves, the secondary ejector bottom plate 7, the secondary ejector plate 6, the primary ejector plate 8 and the primary ejector bottom plate 9 can be moved together, so that the primary ejector 13 and the secondary ejector 14 are ejected at the same time. When the secondary ejector plate 6 moves to the center hole of the wedge block 15 inserted into the slider 16, the wedge block 1 5 cooperates with the inclined surface of the slider 16, and pushes the slider 16 to move right. At this time, the slider 16 pushes the extrusion spring 19, and the slider 16 and the hook pin 17 are no longer plugged in. At this time, the primary ejector plate 8 and the primary ejector bottom plate 9 will stop, so that the primary ejector 13 stops ejecting. However, as the ejector bar 18 continues to move upward, it drives the secondary ejector bottom plate 7 and the secondary ejector plate 6, and the secondary ejector 14 continues to eject. In this way, a downward force is applied by the primary ejector 13, and an upward force is applied by the secondary ejector 14 to demould the primary ejector 13 from the product, thereby completing the forced ejection of the product.

Claims

1. A secondary ejection forced release mechanism, comprising a fixed mold base plate (1), a flow channel plate (2) mounted at the lower end thereof, a fixed mold plate (3) mounted at the lower end of the flow channel plate (2), and a movable mold plate (4) arranged below the fixed mold plate (3), wherein a fixed mold core (11) is mounted inside the fixed mold plate (3), and a movable mold core (12) is mounted inside the movable mold plate (4), characterized in that: Square irons (5) are fixed to both the front and rear sides of the lower end of the movable mold plate (4), a movable mold bottom plate (10) is fixed between the lower ends of the square irons (5), a push rod (18) is installed through the center of the movable mold bottom plate (10), a primary push rod bottom plate (9) is arranged above the movable mold bottom plate (10), the push rod (18) and the primary push rod bottom plate (9) are arranged through each other, a primary push rod plate (8) is fixed to the upper end of the primary push rod bottom plate (9), the primary push rod plate (8) and the push rod (18) are arranged through each other, a secondary push rod bottom plate (7) is arranged above the primary push rod plate (8), the upper end of the push rod (18) and the secondary push rod bottom plate (7) are fixed by screws, a secondary push rod plate (6) is fixed above the secondary push rod bottom plate (7), a primary push rod (13) is fixed through the right part of the primary push rod plate (8), the upper part of the primary push rod (13) The primary ejector (13) is inserted through the secondary ejector bottom plate (7) and the secondary ejector plate (6) in sequence. The bottom of the primary ejector (13) is against the primary ejector bottom plate (9). The left part of the secondary ejector plate (6) is inserted through and fixed with a secondary ejector (14). The bottom of the secondary ejector (14) is against the secondary ejector bottom plate (7). The tops of the primary ejector (13) and the secondary ejector (14) are inserted through the dynamic model core (12). A hook pin (17) is fixed on the left side of the upper end of the primary ejector bottom plate (9). The top of the hook pin (17) is inserted through the primary ejector plate (8), the secondary ejector bottom plate (7) and the secondary ejector plate (6) in sequence. A slider (16) is elastically connected to the left side of the upper end of the secondary ejector plate (6). The slider (16) is plugged with the hook pin (17). A wedge block (15) plugged with the slider (16) is fixed on the left side of the lower end of the dynamic model (4).

2. A secondary ejection and forced release mechanism according to claim 1, characterized in that: The primary ejector plate (8) and the primary ejector bottom plate (9) are fixed by screws.

3. A secondary ejection and forced release mechanism according to claim 1, characterized in that: The secondary ejector plate (6) and the secondary ejector bottom plate (7) are fixed by screws.

4. A secondary ejection and forced release mechanism according to claim 1, characterized in that: The secondary push rod plate (6), the secondary push rod bottom plate (7), the primary push rod plate (8) and the primary push rod bottom plate (9) are all located between the square irons (5) and are slidably connected to the square irons (5).

5. The secondary ejection forced release mechanism according to claim 1, characterized in that: The hook pin (17) is fixedly connected to the primary ejector plate (8), and the hook pin (17) is movably connected to the secondary ejector bottom plate (7) and the secondary ejector plate (6) respectively.

6. A secondary ejection and forced release mechanism according to claim 1, characterized in that: A groove is formed on the left side of the upper end of the secondary ejector plate (6), the slider (16) is slidably connected inside the groove, and a spring (19) is connected between the left part of the slider (16) and the inner wall of the groove.

7. A secondary ejection forced release mechanism according to claim 6, characterized in that: The top of the hook pin (17) is located in the groove, and one end of the top of the hook pin (17) close to the slider (16) is provided with a hook groove, and the slider (16) is plugged into the hook groove.

8. A secondary ejection and forced release mechanism according to claim 7, characterized in that: A center hole is provided in the middle of the slider (16), and the wedge block (15) is plugged into the center hole. The left side of the lower end of the wedge block (15) is an inclined surface, and the upper left end surface of the inner wall of the center hole is an inclined surface. The inclined surface of the wedge block (15) matches the inclined surface of the center hole.

9. A secondary ejection and forced release mechanism according to claim 8, characterized in that: The inclined surface of the wedge block (15) is provided with an upper rolling groove (22), an upper ball (23) is rollingly connected inside the upper rolling groove (22), the inclined surface of the center hole is provided with a lower rolling groove (20), a lower ball (21) is rollingly connected inside the lower rolling groove (20), and the lower ball (21) is in contact with the upper ball (23).

10. The secondary ejection forced release mechanism according to claim 1, characterized in that: An undercut is provided above the primary ejector rod (13).

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