A mold demoulding structure

Abstract

The present invention relates to a mold demoulding structure, including a fixed mold mounting plate, a movable mold mounting plate, an ejector bottom plate and an ejector plate, the fixed mold mounting plate is provided with a fixed mold core, the movable mold mounting plate is provided with a movable mold insert, the ejector plate is provided with a push rod passing through the movable mold insert, and a push block is provided on the push rod; the movable mold mounting plate is also provided with a slider, a first inclined ejector block, a second inclined ejector block passing through the inside of the slider and a fixed guide block limiting the movement direction of the second inclined ejector block, the first inclined ejector block is connected to the ejector plate through the inclined ejector rod, the first inclined ejector block, the second inclined ejector block, the movable mold insert and the fixed mold core form a product molding cavity; the slider is connected to a driving device. Compared with the use of a contraction structure, the inclined ejector is pulled inward by an external driving device, and two different buckle positions are separated into two inclined ejector demouldings, so that the core pulling distance is very short, the mold structure is also simpler, and it is easier to repair and maintain the stability of the structure.

Description

Technical Field

[0001] The invention relates to the field of mold demoulding structures, and more specifically, to a mold demoulding structure. Background Art

[0002] The drawer handles are usually large sliders, rotating cores and large inclined top mechanisms, such as Figure 1 As shown, the core pulling position is provided with two buckles at different positions and angles. The existing practice is to use a shrinking structure, which refers to the use of a movable inward-retracting insert at the core buckle position. Then, a plate must be added to the movable mold mounting plate for installing the movable insert, and in order to ensure the mold opening sequence, an external hook structure must be added to remove the movable insert. This structure results in a large core pulling distance for mold opening. Since the movement of the insert will cause wear, frequent mold opening through the shrinking structure will affect the mold life, and there are also problems such as difficulty in maintenance and high cost. Summary of the invention

[0003] In order to overcome the problem of large mold opening and core pulling distance in the above-mentioned prior art, the present invention provides a demolding scheme for inner pulling of the inclined top inside the slider. With the assistance of the core pulling by an external driving device, the inclined top moves in the direction of the guide block fixed on the movable mold mounting plate, thereby reducing the core pulling distance.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mold demolding structure, including a fixed mold mounting plate, a movable mold mounting plate, an ejector base plate and an ejector plate, the fixed mold mounting plate is provided with a fixed mold core, the movable mold mounting plate is provided with a movable mold insert, the ejector plate is provided with a push rod passing through the movable mold insert, and a push block is provided on the push rod; the movable mold mounting plate is also provided with a slider, a first inclined ejector block, a second inclined ejector block passing through the slider and a fixed guide block limiting the movement direction of the second inclined ejector block; the first inclined ejector block and the second inclined ejector block are located within the range of the fixed mold core and contact each other, and the first inclined ejector block is connected to the ejector plate through an inclined ejector rod; the first inclined ejector block, the second inclined ejector block, the movable mold insert and the fixed mold core surround a product molding cavity; the slider is connected to a driving device.

[0005] After the product molding cavity is formed, the mold is opened. The driving device pulls the slider outward, and the second inclined ejector block passing through the inside of the slider moves downward toward the mold core under the action of the fixed guide block. The first inclined ejector block also moves toward the mold core, and the push rod pushes the product upward. After the two inclined ejectors move a certain distance, the core pulling is completed.

[0006] Preferably, the driving device is a hydraulic cylinder. The pulling force of the hydraulic drive is sufficient and stable, ensuring that the slide block can stably drive the first inclined top block to move.

[0007] Preferably, a heat insulation board is provided on the end surface of the panel of the fixed mold mounting plate away from the fixed mold mounting plate to prevent high temperature from being dissipated into the air during injection molding, resulting in an increase in the ambient temperature.

[0008] Preferably, a slanted wedge is provided on the fixed mold mounting plate on the side away from the mold core relative to the slider, and when the mold is closed, the slanted wedge presses the slider to prevent the slider from sliding back during injection molding, causing the position of the second inclined ejector block to change, and finally deforming the molded product.

[0009] Preferably, a metal insert is installed in the movable mold mounting plate at the position where the inclined ejector rod is mounted, and the metal insert is preferably made of copper. When the inclined ejector rod moves in the movable mold mounting plate, a certain amount of friction will be generated. After long-term use, the movable mold mounting plate will be worn and unable to fit tightly against the inclined ejector rod, which will easily cause the inclined ejector rod to shake, which is not conducive to the stability of mold closing and demolding. Practical metal inserts are convenient for maintenance and replacement after wear occurs.

[0010] Preferably, the inclination of the inclined surface of the first inclined lift block is greater than the inclination of the guide rod of the second inclined lift block. The first inclined lift block and the second inclined lift block both move in the same direction, and setting different inclinations can avoid interference during demoulding movement.

[0011] More preferably, the inclination of the inclined surface of the first inclined lift block is 2 degrees greater than the inclination of the guide rod of the second inclined lift block, thereby further reducing the core pulling distance of the inclined lift while avoiding motion interference.

[0012] Preferably, the ejector plate is provided with an inclined ejector seat, which can be arranged on a side close to the first ejector block, and the ejector rod is mounted on the inclined ejector seat. The ejector rod is mounted on the inclined ejector seat, which is equivalent to a needle seat, and is convenient for the maintenance and replacement of the ejector rod.

[0013] More preferably, the inclined ejector seat is provided with a slide groove inclined upward toward one side of the first inclined ejector block, the slide groove is slidably connected with an inclined ejector slider, and the inclined ejector rod is installed on the inclined ejector slider. When demoulding, the inclined ejector slider drives the inclined ejector rod to move downward to the inside of the mold to achieve demoulding, which can reduce the moving distance of the ejector plate core pulling.

[0014] Compared with the prior art, the beneficial effects are: the inclined top is pulled inward by an external oil cylinder, and two different buckle positions are separated into two inclined top demouldings, so that the core pulling distance is very short, the mold structure is simpler, and it is easier to maintain and maintain the stability of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the product;

[0016] Figure 2 is a cross-sectional view of the present invention;

[0017] Figure 3 is a cross-sectional view from another angle of the present invention;

[0018] Figure 4 is a cross-sectional view of another embodiment of the present invention;

[0019] Figure 5 yes Figure 4 A partial enlarged view of position A.

[0020] Among them: 1. Heat insulation board; 2. Panel; 3. Fixed mold mounting plate; 4. Fixed mold core; 5. Moving mold mounting plate; 6. Moving mold insert; 7. Push rod; 8. Push block; 9. Hydraulic oil cylinder; 10. Ejector plate; 11. Ejector bottom plate; 12. Bottom plate; 13. Second inclined ejector block; 14. Fixed guide block; 15. Slider; 16. First inclined ejector block; 17. Ejector seat; 18. Ejector slider; 19. Ejector rod; 20. Oblique wedge; 21. Metal insert; 22. Slide; 23. Product. DETAILED DESCRIPTION

[0021] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0022] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0024] Example 1

[0025] like Figures 2 to 3As shown, a mold demoulding structure includes a fixed mold mounting plate 3, a movable mold mounting plate 5, an ejector base plate 11, an ejector plate 10 and a base plate 12, the fixed mold mounting plate 3 is provided with a fixed mold core 4, and the panel 2 on the fixed mold mounting plate 3 is provided with a heat insulation plate at one end away from the fixed mold mounting plate; the movable mold mounting plate 5 is provided with a movable mold insert 6, a slider 15, a first inclined ejector block 16, a second inclined ejector block 13 passing through the inside of the slider 15 and a fixed guide block 14 limiting the movement direction of the second inclined ejector block 13, the first inclined ejector block 13 is connected to the ejector plate 10 through an inclined ejector rod 19, the ejector plate 10 is provided with a push rod 7 passing through the movable mold insert 6, and the push rod 7 is provided with a push block 8; the first inclined ejector block 16 and the second inclined ejector block 13 are located within the range of the fixed mold core 4 and contact each other, the first inclined ejector block 16, the second inclined ejector block 13, the movable mold insert 6 and the fixed mold core 4 surround a product molding cavity; the slider 15 is connected to a hydraulic cylinder 9.

[0026] The fixed guide block 14 is installed on one side of the movable mold mounting plate close to the second inclined ejector block 13 .

[0027] Furthermore, the inclination of the inclined surface of the first inclined lift block 16 is greater than the inclination of the guide rod of the second inclined lift block 13. The first inclined lift block and the second inclined lift block both move in the same direction, and setting different inclinations can avoid interference during demoulding movement.

[0028] Furthermore, the inclination of the inclined surface of the first inclined ejector block 16 is 2 degrees greater than the inclination of the guide rod of the second inclined ejector block 13. While avoiding motion interference, the core pulling distance of the inclined ejector is further reduced.

[0029] Example 2

[0030] like Figure 4-5 As shown, the difference between this embodiment and embodiment 1 is that a bevel 20 is provided on the side of the fixed mold mounting plate 3 that is away from the mold core relative to the slider 15. When the mold is closed, the bevel 20 presses the slider 15. This prevents the slider from slipping back during injection molding, causing the position of the second lift block to change, and the final molded product to be deformed. A metal insert 21 is installed in the position of the movable mold mounting plate 5 that fits with the lift rod 19. The metal material of the metal insert 21 can be copper. When the lift rod moves in the movable mold mounting plate, a certain amount of friction will be generated. After being used for a long time, the movable mold mounting plate will be worn and cannot be close to the lift rod, which will easily cause the lift rod to shake, which is not conducive to the stability of mold closing and demolding. The use of metal inserts facilitates maintenance and replacement after wear. The remaining features are the same as those in embodiment 1.

[0031] Further on the basis of embodiment 2, the ejector plate 10 is provided with an inclined ejector seat 17 near the first inclined ejector block 16, and the inclined ejector rod 19 is installed on the inclined ejector seat 17. The inclined ejector rod 19 is installed on the inclined ejector seat, and the inclined ejector seat 17 is equivalent to a needle seat, which facilitates the maintenance and replacement of the inclined ejector rod 19.

[0032] Furthermore, the inclined ejector seat 17 is provided with a slide groove 22 inclined toward one side of the first inclined ejector block 16, and the slide groove 22 is slidably connected with an inclined ejector slider 18, and an inclined ejector rod 19 is installed on the inclined ejector slider 18. When demoulding, the inclined ejector slider drives the inclined ejector rod to move downward to the inside of the mold to realize demoulding, which can reduce the moving distance of the ejector plate core pulling.

[0033] The working principle or workflow of the present invention is as follows: the mold is closed, and the molten plastic raw material is formed in the product molding cavity surrounded by the first inclined ejector block 16, the second inclined ejector block 13, the movable mold insert 6 and the fixed mold core 4. After the injection molding is completed, the injection molding machine applies an external force to the ejector plate 10 to move it upward, driving the inclined ejector rod 19 and the push rod 7 to move upward. Since the inclined ejector rod 19 is inclined and the push rod 7 is vertical, the upward movement distance of the inclined ejector rod is less than that of the push rod 7. The push block 8 on the push rod 7 pushes the product upward to be demolded. Under the action of the inclined ejector rod 19, the first inclined ejector block 16 moves toward the center of the mold to disengage from the buckle position. At the same time, under the action of the hydraulic cylinder, the slider 15 moves in the direction away from the mold core, and pulls the second inclined ejector block 13 passing through the inside of the slider 15 to move. Since the second inclined ejector block 13 is connected to the fixed guide block 14, the second inclined ejector block 13 moves to the lower part of the inner side of the mold to disengage from another buckle position under the limitation of the fixed guide 14.

[0034] The external oil cylinder is used to pull the core inward, and two different buckle positions are separated into two inclined demoulding, which makes the core pulling distance very short, the mold structure is simpler, and it is easier to maintain and maintain the stability of the structure.

[0035] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A mold demoulding structure, comprising a fixed mold mounting plate (3), a movable mold mounting plate (5), an ejector base plate (11), an ejector plate (10) and a base plate (12), wherein the fixed mold mounting plate (3) is provided with a fixed mold core (4), the movable mold mounting plate (5) is provided with a movable mold insert (6), the ejector plate (10) is provided with a push rod (7) passing through the movable mold insert (6), and the push rod (7) is provided with a push block (8); characterized in that: The movable mold mounting plate (5) is further provided with a slider (15), a first inclined ejector block (16), a second inclined ejector block (13) passing through the slider (15), and a fixed guide block (14) defining the movement direction of the second inclined ejector block (13); the first inclined ejector block (16) and the second inclined ejector block (13) are located within the range of the fixed mold core (4) and contact each other, and the first inclined ejector block (16) is connected to the ejector plate (10) via an inclined ejector rod (19); the first inclined ejector block (16), the second inclined ejector block (13), the movable mold insert (6) and the fixed mold core (4) form a product molding cavity; the slider (15) is connected to a driving device; The inclination of the inclined surface of the first inclined lift block (16) is greater than the inclination of the guide rod of the second inclined lift block (13); The ejector plate (10) is provided with an inclined ejector seat (17), and the inclined ejector rod (19) is mounted on the inclined ejector seat (17); the inclined ejector seat (17) is provided with a slide groove (22) which is inclined upward toward one side of the first inclined ejector block (16), and a inclined ejector slider (18) is slidably connected to the slide groove (22), and the inclined ejector rod (19) is mounted on the inclined ejector slider (18); A slanted wedge (20) is provided on the fixed mold mounting plate (3) at a side of the slider (15) away from the mold core, and when the mold is closed, the slanted wedge (20) presses the slider (15); The inclination of the inclined surface of the first inclined lift block (16) is 2 degrees greater than the inclination of the guide rod of the second inclined lift block (13).

2. A mold demoulding structure according to claim 1, characterized in that: The driving device is a hydraulic cylinder.

3. A mold demoulding structure according to claim 1, characterized in that: A heat insulation plate (1) is provided on the end surface of the panel (2) of the fixed mold mounting plate (3) at a side away from the fixed mold mounting plate (3).

4. A mold demoulding structure according to claim 1, characterized in that: A metal insert (21) is installed in the movable mold mounting plate (5) at a position fitted with the inclined ejector rod (19).

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