Adaptive device for thermal deformation of die casting / injection molding system

Abstract

An adaptive device for thermal deformation of a die casting / injection molding system. The system comprises a first plate, a second plate and a third plate, a mold being provided between the first plate and the second plate, a fixed mold being provided on the first plate, and a movable mold being provided on the second plate. The second plate is mounted on a movable guide rail and slides on a fixed guide rail, so as to drive the movable mold and the fixed mold to achieve molding closing and mold opening. A spherical swing mechanism and a mold locking mechanism are connected in series between the second plate and the third plate. Series connection of the mold locking mechanism and the spherical swing mechanism between the second plate and the third plate in the present invention enables the mold locking mechanism to adapt to parallelism errors between the second plate and the third plate caused by thermal deformation; and a movable-mold mounting portion of the second plate is configured to be a floating second plate, such that the mold locking mechanism can adapt to parallelism errors of the mold caused by thermal deformation and parallelism errors between the first plate and the second plate caused by thermal deformation. Thus, during mold closing, contact surfaces of the fixed mold and the movable mold are closely attached, thereby reducing flashing and improving quality of products.

Description

An adaptable device for thermal deformation of die casting and injection molding systems Technical Field

[0001] The invention relates to the technical field of die casting and injection molding, and in particular to a device for adapting to thermal deformation of a die casting and injection molding system. Background Art

[0002] The die-casting system and injection molding system include die-casting molds and die-casting machines, injection molds and injection molding machines. Their structural characteristics are that the fixed and movable molds are respectively installed on the head plate and the second plate, and the mold mounting surfaces of the two plates are parallel to the two mold mounting planes. Its working process is mold closing - mold preheating - material heating - injection into mold - mold cooling - mold opening - workpiece ejection. This process is repeated, and the mold and the head plate and the second plate of the mold installation of the die-casting injection molding machine are repeatedly heated and cooled. In this process, due to uneven temperature, the parallelism between the third plate and the second plate in the three-plate machine will change, and the parallelism between the two mounting surfaces of the mold and the mold mounting surfaces of the head plate and the second plate will also change, resulting in lax mold closing and flash and thickness deviation of the pressed parts. Severe problems will be caused by water splashing. For example, "2017208826589" A die-casting mold that prevents water splashing introduces a die-casting mold that prevents water splashing, but this method can only solve the problem of preventing damage, and cannot solve the problems of part quality caused by water splashing, such as flash, size, thickness changes, etc.

[0003] Summary of the Invention

[0004] In order to solve the above problems, the present invention provides a device for adapting to thermal deformation of a die-casting and injection molding system, which can effectively solve the deficiencies in the prior art.

[0005] The present invention is achieved through the following technical solutions: an adaptive device for thermal deformation of a die-casting injection molding system, the system comprises a head plate, a second plate and a third plate, a mold is installed between the head plate and the second plate, a fixed mold is installed on the head plate, a movable mold is installed on the second plate, the second plate is installed on the movable guide rail and slides along the fixed guide rail to drive the movable mold and the fixed mold to close the mold, and can also drive the movable mold to leave the fixed mold, a locking mechanism is provided between the second plate and the third plate, the direction of the locking force is perpendicular to the plane of the head plate, the second plate and the third plate, a spherical swing mechanism and a locking mechanism are connected in series between the second plate and the third plate, the spherical swing mechanism is composed of a concave spherical panel and a convex spherical panel, the concave spherical surface and the convex spherical surface cooperate with each other, the back of the convex spherical surface of the concave panel is a plane, and the back of the convex spherical surface of the convex spherical panel is a plane, and the two planes can be parallel and can swing in all directions.

[0006] As a preferred technical solution, the clamping mechanism is a toggle clamping mechanism.

[0007] As a preferred technical solution, the clamping mechanism is a wedge clamping mechanism.

[0008] As a preferred technical solution, the clamping mechanism is a hydraulic clamping mechanism.

[0009] As a preferred technical solution, the combination of the clamping mechanism and the spherical swing mechanism can be moved to the side of the machine in a direction perpendicular to the clamping direction.

[0010] The present invention provides an adaptive device for thermal deformation of a die-casting injection molding system. The system comprises a head plate, a second plate and a third plate. A mold is installed between the head plate and the second plate. A fixed mold is installed on the head plate and a movable mold is installed on the second plate. The second plate is installed on a movable guide rail and slides along the fixed guide rail to drive the movable mold and the fixed mold to close the mold, and can also drive the movable mold to leave the fixed mold. A locking mechanism is provided between the second plate and the third plate. The direction of the locking force is perpendicular to the planes of the head plate, the second plate and the third plate. The second plate and the movable guide rail can be floatingly connected. The second plate can float arbitrarily in a plane perpendicular to the direction of the locking force and can swing non-parallel to the plane. The floating range is greater than the dislocation caused by thermal deformation of the fixed and movable molds, and the swing range is greater than the inclination angle of the fitting surface of the fixed and movable molds caused by thermal deformation.

[0011] As a preferred technical solution, when the Corinthian column is used as the fixed guide rail for the movement of the two plates, it is composed of an outer frame and two floating plates, which are connected by an elastic member.

[0012] As an optimal technical solution, when the moving guide rail surface of the two plates is flat, the two plates are divided into a flat guide rail two-plate outer frame and a floating two-plate. The outer frame is fixed on the moving guide rail, and the floating two-plate is connected by an elastic part in the middle of the outer frame.

[0013] As a preferred technical solution, when the moving guide rail surface of the two plates is a plane, an elastic member is provided between the bottom of the two plates and the moving guide rail for floating connection.

[0014] As a preferred technical solution, the lower part of the movable mold is supported by a mold adjustment auxiliary spring and has an adjustable height component to adjust the height of the movable mold.

[0015] As a preferred technical solution, an adjustable height component is provided at the bottom of the elastic member to adjust the height of the movable mold 3 .

[0016] As an optimal technical solution, there is a gap between the floating two plates and the outer frame, and a number of floating springs are installed in the gap in a plane perpendicular to the direction of the clamping force. There are some stops in both directions between the floating two plates and the outer frame in the direction of the clamping force and there is a stop gap, and a swinging floating spring is installed in the stop gap.

[0017] The beneficial effects of the present invention are as follows: the present invention connects a spherical swing mechanism in series with the clamping mechanism between the second plate and the third plate of the die-casting and injection molding machine, so that the clamping mechanism can adapt to the parallelism error between the second plate and the third plate caused by thermal deformation, and the movable mold assembly part on the second plate is set as a floating second plate, so that the clamping mechanism can adapt to the mold parallelism error and the parallelism error between the first and second plates caused by thermal deformation. The effect achieved is to lock the mold based on the contact surface fit of the fixed and movable molds and the positioning pins between the fixed and movable molds, thereby eliminating water flying, reducing flash, and improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] FIG1 is a schematic diagram of mold clamping of the present invention;

[0020] FIG2 is a schematic diagram of a loose mold clamping caused by uneven mold thermal deformation of the present invention;

[0021] FIG3 is a schematic diagram showing the relative positions of the first and second plates of the mold with uneven thermal deformation according to the present invention when the mold is evenly closed;

[0022] FIG4 is a schematic diagram of a spherical swing mechanism of the present invention;

[0023] FIG5 is a schematic diagram of a spherical swing mechanism plus an inclined wedge locking mechanism according to the present invention;

[0024] FIG6 is a schematic diagram of a spherical swing mechanism plus an independent wedge locking mechanism according to the present invention;

[0025] FIG7 is a schematic diagram of the clamping mechanism of the swing assembly of the three-plate machine of the present invention;

[0026] FIG8 is a plan view of the second plate and the movable guide rail of the movable mold of the present invention;

[0027] FIG9 is a diagram showing the relationship between the swing assembly and the wedge locking mechanism assembly of the present invention and the machine;

[0028] FIG10 is a schematic diagram of the present invention showing the swing assembly and the wedge locking mechanism of the present invention being moved out of the machine from the side, with the two plates and the mold in the retracted position;

[0029] FIG11 is a top view of the swing assembly and the wedge clamping mechanism of the present invention, with the two plates and the mold in the retracted position, with the crime side moved out of the machine;

[0030] FIG12 is a diagram showing a state in which the second plate of the assembly of the present invention is moved to drive the mold to close;

[0031] FIG13 is a diagram of a floating connection of two plates when the two movable guide rails of the present invention are flat;

[0032] FIG14 is a schematic diagram of the floating connection of the two plates when the two plate movable guide rails and the fixed guide rails are Corinthian columns of the present invention;

[0033] FIG15 is a front view of the floating connection of the two plates when the two movable guide rails of the present invention are fixed guide rails as Corinthian columns;

[0034] FIG16 is a position diagram of the Corinthian column guide rail frame and the floating second plate elastic member of the present invention;

[0035] FIG17 is a diagram showing the positions of the flat guide rail second plate outer frame and the floating second plate elastic member of the present invention;

[0036] FIG18 is a schematic diagram of the swing assembly of the present invention with wedge locking and two floating plates;

[0037] FIG19 is a schematic diagram of the auxiliary spring support for adjusting the integral floating two-plate mold of the present invention;

[0038] FIG20 is a schematic diagram of the auxiliary spring support for the mold adjustment of the Golin column fixed guide rail movable guide rail frame of the present invention;

[0039] FIG21 is a schematic diagram of an adjustable height spring base according to the present invention;

[0040] Description of the drawings: 1. Plate 1; 2. Fixed mold; 3. Moving mold; 4. Plate 2; 41. Moving guide rail frame for fixed guide rail of Golin column; 42. Floating plate 3 for moving guide rail of Golin column; 43. Integral floating plate 3; 44. Outer frame for flat guide rail 3; 45. Floating plate 3 for flat guide rail; 5. Convex spherical swing plate; 6. Concave spherical swing plate; 7. Active slant wedge; 71. Passive slant wedge; 72. Passive slant wedge support plate; 8. Clamping mechanism; 9. Plate 3; 10. Crossbeam; 11. Moving guide rail of plate 2; 12. Fixed guide rail of plate 2; 13. Support for swing locking mechanism; 14. Moving oil cylinder for slant wedge; 15. Moving guide rail for swing locking assembly; 16 , swing locking assembly moving cylinder; 17, elastic element; 171, translation floating spring; 172, swing floating spring; 18, Corinthian column; 19, Corinthian column fixed guide rail, movable guide rail frame, mold adjustment auxiliary spring support seat; 20, mold adjustment auxiliary spring; 21, adjustable mold adjustment auxiliary spring assembly; 211, adjustable height horizontal wedge; 212, adjustable height wedge; 213, height adjustment nut; 214, height adjustment screw; 215, adjustable mold adjustment auxiliary spring base; DETAILED DESCRIPTION

[0041] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

[0042] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or similar features. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0043] Example 1

[0044] As shown in Figures 9, 10, 11 and 12, a square frame is composed of one plate 1, three plates 9 and a crossbeam 10, the fixed mold is installed on one plate, the movable mold 3 is installed on the second plate, and the lower mold wedge 10 has a two-plate movable guide rail composed of two-plate fixed guide rails 12 and two-plate movable guide rails 11. There is a swing locking assembly between the second plate 4 and the third plate 9. The spherical swinging part is composed of a concave spherical swinging plate 6 and a convex spherical swinging plate 5. The locking part is composed of an active bevel 7 and a passive bevel 71, which are placed on the component bracket swing locking mechanism bracket 13. A bevel moving cylinder 14 is installed above the swing locking mechanism bracket 13 to push the active bevel 7 up and down to achieve the purpose of locking or unlocking the mold, and the swing locking mechanism bracket 13 plays the role of the passive bevel support plate 72. Figure 12 shows a swing assembly, a swing locking assembly guide rail 15, and a swing locking assembly moving cylinder 16. The swing locking assembly is mounted on the swing locking assembly guide rail 15. The swing locking assembly moving cylinder 16 can move the clamping mechanism 8 between the second and third plates 4, 9, for clamping. It can also pull the clamping mechanism 8 out of the space between the second and third plates 4, 9, allowing the second plate 4 and movable mold 3 to retreat along the fixed guide rail 12, driven by the movable guide rail 11, to separate the movable mold 3 from the fixed mold 2, creating a space for part demolding. Figure 10 shows the second plate 4 and movable mold 3 separating from the fixed mold 2, creating a space for part demolding. Figure 11 is a top view of Figure 10, and Figure 12 is a top view of Figure 10 after part demolding and reclosing, before the swing locking assembly enters the space between the second and third plates 4, 9. This embodiment can accommodate situations where parallelism errors between the third and second plates are caused by thermal deformation. When the wedge moving cylinder presses the active wedge 7 downward, it is in the mold locking state, and when it is pulled upward, it is in the mold releasing state. The height adjustment screw 214 can adjust the height of the movable mold 3 so that the tapered pins and holes on the movable mold 3 and the fixed mold 2 are aligned in height.

[0045] Example 2

[0046] By replacing the active cam 7 and the passive cam 71 in embodiment 1 with hydraulic cylinders, the swing and hydraulic components can be formed into a swing and clamping assembly.

[0047] Example 3

[0048] As shown in Figures 13, 18, 19, and 21, unlike Examples 1 and 2, several elastic elements 17 are installed between the integral floating second plate 43 and the movable guide rail 11, allowing the second plate 4 and movable mold 3 to swing or float within a plane perpendicular to the clamping force. The mold is positioned based on the mating surfaces of the fixed mold 2 and 3, and the guide taper pins between the fixed mold 2 and movable mold 3 are used to position the mold within a plane perpendicular to the clamping force. This embodiment can accommodate mold thermal deformation and parallelism errors between the first and second plates. In Figure 19, the lower portion of the movable mold 3 is equipped with several mold adjustment auxiliary springs 20 and an adjustable mold adjustment auxiliary spring assembly 21. A height adjustment screw 214 adjusts the height of the movable mold 3 to ensure that the taper pins and holes on the movable mold 3 and fixed mold 2 are aligned.

[0049] Example 4

[0050] As shown in Figures 14 and 15, what is different from Example 3 is that in the machine using the Corinthian column 18 as a guide for the movement of the two plates 4, the two plates are divided into an outer frame 41 and a floating two-plate composition, and an elastic element support 17 is provided between the two so that the floating two-plate can float in a plane perpendicular to the clamping direction and can swing to adapt to the clamping surfaces of the fixed mold 2 and the movable mold 3, and the change in parallelism caused by thermal deformation. The Corinthian column fixed guide rail moving guide rail frame 41 of Figure 20 has a Corinthian column fixed guide rail moving guide rail frame mold adjustment auxiliary spring support seat 19, and an elastic element 17 is provided between the Corinthian column moving guide rail floating second plate 42 and the Corinthian column fixed guide rail moving guide rail frame 41. The Corinthian column fixed guide rail moving guide rail frame 41 has a movable mold 3, and there are several mold adjustment auxiliary springs 20 and an adjustable mold adjustment auxiliary spring assembly 21 on the fixed mold 3 and the Corinthian column fixed guide rail moving guide rail frame mold adjustment auxiliary spring support seat 19. The height adjustment screw 214 can make the adjustable height horizontal wedge 211 move horizontally, so that the adjustable height wedge 212 can be raised and lowered to adjust the height and inclination of the movable mold 3 so that the tapered pins and holes on the movable mold 3 and the fixed mold 2 are height-aligned.

[0051] Example 5

[0052] As shown in Figures 16 and 17, different from Example 3, the overall floating second plate 43 and the elastic element 17 in Figure 13 are replaced by the flat guide rail second plate outer frame 44, the flat guide rail floating second plate 45 and the translation floating spring 171, and the swing floating spring 172 in Figure 7. The flat guide rail second plate outer frame 44 is fixed on the two-plate moving guide rail 11. There is a gap around the flat guide rail floating second plate 45 and the inner cavity of the flat guide rail second plate outer frame 44. There are several translation floating springs 171 in the gap. The flat guide rail second plate outer frame 44 and the guide rail floating second plate 45 have stoppers in both directions in the direction of the clamping force and a stop gap. There are several swing floating springs 172 in the stop gaps on both sides, which can make the guide rail floating second plate 45 swing and float.

[0053] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection defined in the claims.

Claims

1. An adaptable device for heat deformation of a die-casting injection molding system, the system comprises a head plate, a second plate and a third plate, a mold is arranged between the head plate and the second plate, a fixed mold is arranged on the head plate, a movable mold is arranged on the second plate, the second plate is arranged on the movable guide rail and slides along the fixed guide rail to drive the movable mold and the fixed mold to close the mold, and also to drive the movable mold to leave the fixed mold, a clamping mechanism is arranged between the second plate and the third plate, and the direction of the clamping force is perpendicular to the planes of the head plate, the second plate and the third plate, and the characteristics are as follows: A spherical swing mechanism and a clamping mechanism are connected in series between the second plate and the third plate. The spherical swing mechanism consists of a concave spherical panel and a convex spherical panel. The concave spherical surface and the convex spherical surface cooperate with each other. The back of the convex spherical surface of the concave panel is a plane, and the back of the convex spherical surface of the convex spherical panel is a plane. The two planes can be parallel and can swing in all directions.

2. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 1, characterized in that: The clamping mechanism is a toggle clamping mechanism.

3. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 1, characterized in that: The clamping mechanism is an inclined wedge clamping mechanism.

4. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 1, characterized in that: The clamping mechanism is a hydraulic clamping mechanism.

5. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 1, 3 or 4, characterized in that: The clamping mechanism and the spherical swing mechanism combination can be moved to the side of the machine in a direction perpendicular to the clamping direction.

6. An adaptable device for heat deformation of a die-casting injection molding system, the system comprises a head plate, a second plate and a third plate, a mold is arranged between the head plate and the second plate, a fixed mold is arranged on the head plate, a movable mold is arranged on the second plate, the second plate is arranged on the movable guide rail and slides along the fixed guide rail to drive the movable mold and the fixed mold to close the mold, and also to drive the movable mold to leave the fixed mold, a clamping mechanism is arranged between the second plate and the third plate, and the direction of the clamping force is perpendicular to the planes of the head plate, the second plate and the third plate, and the characteristics are: The two plates are connected in a floating manner to the movable guide rail. The two plates can float arbitrarily in a plane perpendicular to the clamping force direction and can swing non-parallel to the plane. The floating range is greater than the dislocation caused by thermal deformation of the fixed and movable molds, and the swing range is greater than the inclination angle of the fitting surface of the fixed and movable molds caused by thermal deformation.

7. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 6, characterized in that: When the Corinthian column is used as a fixed guide rail for the movement of the two plates, it is composed of an outer frame and two floating plates, and an elastic member is connected between the two plates.

8. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 6, characterized in that: When the moving guide surface of the two plates is a plane, the two plates are divided into a flat guide plate outer frame and a floating two plates. The outer frame is fixed on the moving guide rail, and the floating two plates are connected by an elastic member in the middle of the outer frame.

9. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 6, characterized in that: When the moving guide rail surface of the second plate is a plane, an elastic member is provided between the bottom of the second plate and the moving guide rail for floating connection.

10. The device for adapting to thermal deformation of a die casting and injection molding system according to claim 6, 7 or 8, characterized in that: The lower part of the movable mold is supported by a mold adjustment auxiliary spring and has an adjustable height component to adjust the height of the movable mold.

11. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 9, characterized in that: An adjustable height component is provided at the bottom of the elastic member to adjust the height of the movable mold.

12. The device for adapting to thermal deformation of a die-casting injection molding system according to claim 7 or 8, characterized in that: There is a gap around the floating second plate and the outer frame, and a plurality of floating springs are installed in the gap in a plane perpendicular to the clamping force direction. There are stoppers and stopper gaps in both directions between the floating second plate and the outer frame in the clamping force direction, and a swing floating spring is installed in the stopper gap.

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