Single-point pre-ejection mechanism of large die-casting die sliding block deep-cavity column table

Abstract

The single-point pre-ejection mechanism comprises a sliding block structure, a spring pre-ejection mechanism and an oil cylinder, the sliding block structure comprises a sliding block head and a sliding block seat, the spring pre-ejection mechanism comprises a spring, an ejection rod and a pre-ejection guide block, the spring pre-ejection mechanism is arranged in the sliding block structure through the ejection rod, and the pre-ejection guide block is arranged in the sliding block structure. The sliding block structure is arranged in the movable mold frame; the oil cylinder is used for driving the sliding block head; a wedging block is arranged on one side of the sliding block base, a pre-jacking pressing plate is arranged on one side of the pre-jacking guide block, and the wedging block and the pre-jacking pressing plate are fixed to the fixed mold frame. The spring pre-ejection mechanism is additionally arranged between the sliding block and the fixed mold frame, extra ejection force is provided for the position of a column table with large local wrapping force when the mold is opened, and the quality defects such as strain and deformation of a product are reduced.

Description

Technical Field

[0001] The invention relates to an ejection mechanism, in particular to a single-point pre-ejection mechanism for a deep-cavity column platform of a slide block of a large-scale die-casting mold. Background Art

[0002] Die casting is a method of obtaining castings by loading metal into the mold cavity at high speed under high pressure, and forming and solidifying under pressure. During the die casting process, an interaction force, namely clamping force, will be generated between the casting and the inner wall of the mold. The formation of the clamping force is mainly due to the shrinkage of the casting during the cooling and solidification process, as well as the friction and adhesion between the casting and the inner wall of the mold. When the clamping force is too large, the product will be stretched, buckled, deformed, and even difficult to demold, and it may also cause damage to the mold.

[0003] At present, the structures of the three-electric series products of new energy vehicles and the shells and cylinders of oil vehicles are becoming more and more complex, with more and more deep-cavity shapes, and the clamping force in the production process is also greater. The deep-cavity shapes in the direction of the dynamic and fixed molds can also be demoulded at fixed points using traditional ejector ejection methods and supplemented by ejectors, surface coatings, etc., while the slider side can only rely on the oil cylinder and reverse wedge tightening to pull out the whole. This leads to the slider side of the product often having quality problems such as excessive clamping force on the local shape, strain and deformation, and increased scrap rate.

[0004] Therefore, it is necessary to provide a new ejection solution for the deep cavity column of the die casting mold slider to solve the above problems. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a single-point pre-ejection mechanism for a deep-cavity column of a large die-casting mold slider, which can prevent the slider of the large die-casting mold from being stretched and deformed due to excessive tightening force at the deep-cavity molding position, optimize the mold structure, and improve product quality.

[0006] The present invention provides the following technical solutions:

[0007] A single-point pre-ejection mechanism for a deep-cavity column platform of a large die-casting mold slider comprises a slider structure, a spring pre-ejection mechanism and an oil cylinder. The slider structure comprises a slider head and a slider seat. The spring pre-ejection mechanism comprises a spring, a push rod and a pre-ejection guide block. The spring pre-ejection mechanism is installed in the slider structure through the push rod. The slider structure is installed in a movable mold frame. The oil cylinder is used to drive the slider head. A wedge block is arranged on one side of the slider seat. A pre-ejection pressure plate is arranged on one side of the pre-ejection guide block. The wedge block and the pre-ejection pressure plate are fixed on the fixed mold frame.

[0008] The dynamic and fixed molds are closed. The oil cylinder pushes the wedge block at the front end of the slider seat to gradually press the slider seat. At the same time, the rear pre-pushing plate applies a backward force to the pre-pushing guide block. The pre-pushing guide block retreats to drive the ejector rod to reset and compress the spring until the mold is completely closed.

[0009] The movable fixed mold opens, the pre-elevating pressure plate separates from the pre-elevating guide block, and the oil cylinder starts to reversely increase pressure to pull out the slider head. The positive ejection force given by the compressed spring to the pre-elevating guide block will simultaneously drive the ejector rod to eject, so that the local deep cavity column of the product will be ejected.

[0010] Furthermore, the oil cylinder is connected to one end of the slider seat, and the other end of the slider seat is fixed to the slider head.

[0011] Furthermore, one end of the ejector rod is inserted into the slot of the pre-elevation guide block, the pre-elevation guide block is installed on the slider seat, and the other end of the ejector rod is inserted into the slider seat and the slider head.

[0012] Furthermore, a positioning block is arranged at the rear side of the pre-top guide block, the positioning block is fixed on the slider seat, and a spring is installed between the positioning block and the pre-top guide block.

[0013] Furthermore, the spring is installed in the grooves of the positioning block and the pre-top guide block, and there is a column platform in the groove, and the spring is passed through the column platform.

[0014] Furthermore, the wedge block is aligned with the slider seat, and the pre-top pressure plate is aligned with the pre-top guide block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the key point of the present invention is to add a spring pre-ejection mechanism between the slider and the fixed mold frame, to provide additional ejection force to the column position with a larger local clamping force when the mold is opened, that is, the pre-ejection pressure plate is separated from the pre-ejection guide block, and the cylinder starts to reversely increase the pressure to pull out the slider head. The positive ejection force given by the compressed spring to the pre-ejection guide block will simultaneously drive the ejector rod to eject, thereby helping the local deep cavity column of the product to be ejected, and reducing quality defects such as product strain and deformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the relationship between the slider structure and the movable mold frame of the present invention.

[0017] Figure 2 It is a schematic diagram of the relationship of the spring pre-ejection mechanism of the present invention.

[0018] Figure 3 It is a schematic diagram of the positions of the wedge block and the pre-pressing plate of the present invention.

[0019] Figure 4 It is an overall schematic diagram of the movable and fixed mold frame of the present invention.

[0020] In the figure: 1. Slider head; 2. Slider seat; 3. Moving mold frame; 4. Fixed mold frame; 5. Clamping block; 6. Pre-elevating pressure plate; 7. Pre-elevating guide block; 8. Positioning block; 9. Ejector rod; 10. Spring; 11. Cylinder; 12. Column. Implementation

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-3 The present invention provides a single-point pre-ejection mechanism for a deep-cavity column base of a large die-casting mold slider, comprising a slider structure, a spring pre-ejection mechanism and an oil cylinder 11. The slider structure comprises a slider head 1 and a slider seat 2. The spring pre-ejection mechanism comprises a spring 10, a push rod 9 and a pre-ejection guide block 7. The spring pre-ejection mechanism is installed in the slider structure through the push rod 9. The slider structure is installed in a movable mold frame 3. The oil cylinder 11 is used to drive the slider head 1. A wedge block 5 is provided on one side of the slider seat 2, and a pre-ejection pressure plate 6 is provided on one side of the pre-ejection guide block 7. The wedge block 5 and the pre-ejection pressure plate 6 are fixed on the fixed mold frame 4.

[0024] The movable and fixed molds are closed, the oil cylinder 11 pushes the wedge block 5 at the front end of the slider seat 2 to gradually press the slider seat 2, while the rear pre-pushing plate 6 exerts a backward force on the pre-pushing guide block 7, and the pre-pushing guide block 7 retreats to drive the ejector rod 9 to reset and compress the spring 10 until the mold is completely closed;

[0025] The movable and fixed molds are opened, the pre-elevating pressure plate 6 is separated from the pre-elevating guide block 7, and the oil cylinder 11 starts to reversely increase pressure to pull out the slider head 1. The positive ejection force given by the compressed spring 10 to the pre-elevating guide block 7 will simultaneously drive the ejector rod 9 to be ejected, so that the local deep cavity column of the product will be ejected.

[0026] The oil cylinder 11 is connected to one end of the slider seat 2, the other end of the slider seat 2 is fixed to the slider head 1, one end of the push rod 9 is installed in the slot of the pre-top guide block 7, the pre-top guide block 7 is installed on the slider seat 2, and the other end of the push rod 9 is installed in the slider seat 2 and the slider head 1.

[0027] A positioning block 8 is arranged at the rear side of the pre-top guide block 7, the positioning block 8 is fixed on the slider seat 2, a spring 10 is installed between the positioning block 8 and the pre-top guide block 7, and the whole slider structure (slider seat 2 and slider head 1) is installed into the movable mold frame 3.

[0028] A wedge block 5 and a pre-pushing plate 6 are fixed on the fixed mold frame 4 . The wedge block 5 is aligned with the slider seat 2 , and the pre-pushing plate 6 is aligned with the pre-pushing guide block 7 .

[0029] according to Figure 4As shown, when the movable and fixed molds are closed, the pre-top pressure plate 6 moves down, giving the pre-top guide block 7 a rightward force to compress the spring 10. The positioning block 8 plays a limiting role, and the positioning block 8 and the pre-top guide block are not fixed. The spring 10 is installed in the groove of the positioning block 8 and the pre-top guide block 7. There is a column 12 in the groove, and the spring 10 is worn on the column 12.

[0030] The working principle of this mechanism is as follows: before the movable and fixed molds are closed, the oil cylinder 11 pushes the slider head 1 forward to the maximum stroke position. After the mold closing begins, the clamping block 5 at the front end of the slider seat 2 gradually presses the slider seat 2 while the rear pre-pushing plate 6 applies a backward force to the pre-pushing guide block 7. The pre-pushing guide block 7 retreats to drive the ejector rod 9 to reset and compress the spring 10 until the mold is completely closed (the pre-pushing guide block 7 is limited by the positioning block 8 at the rear side of the slider seat 2).

[0031] After the injection is completed and the casting pressure is maintained, the movable and fixed molds are opened, and the pre-elevating pressure plate 6 is separated from the pre-elevating guide block 7. At this time, the oil cylinder 11 starts to reversely increase the pressure to pull out the slider head 1. The positive ejection force given by the compressed spring 10 to the pre-elevating guide block 7 will simultaneously drive the ejector rod 9 to eject, thereby helping the local deep cavity column platform of the product to be ejected.

[0032] The key point of the present invention is to add a spring pre-ejection mechanism between the slider and the fixed mold frame, to provide additional ejection force to the column position with a large local clamping force when the mold is opened, and to reduce quality defects such as product strain and deformation.

[0033] Prevent the slider of large die-casting mold from being stretched and deformed due to excessive clamping force in deep cavity molding, optimize the mold structure and improve product quality.

[0034] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A single-point pre-ejection mechanism for a deep-cavity column of a large die-casting mold slider, characterized in that: The invention comprises a slider structure, a spring pre-ejection mechanism and an oil cylinder (11), wherein the slider structure comprises a slider head (1) and a slider seat (2), the spring pre-ejection mechanism comprises a spring (10), a push rod (9) and a pre-ejection guide block (7), the spring pre-ejection mechanism is installed in the slider structure through the push rod (9), the slider structure is installed in a movable mold frame (3), and the oil cylinder (11) is used to drive the slider head (1); a wedge block (5) is arranged on one side of the slider seat (2), a pre-ejection pressure plate (6) is arranged on one side of the pre-ejection guide block (7), and the wedge block (5) and the pre-ejection pressure plate (6) are fixed on a fixed mold frame (4); The movable and fixed molds are closed, the oil cylinder (11) pushes the wedge block (5) at the front end of the slider seat (2) to gradually press the slider seat (2), while the rear pre-pushing plate (6) applies a backward force to the pre-pushing guide block (7), the pre-pushing guide block (7) retreats, drives the ejector rod (9) to reset and compresses the spring (10), until the mold is completely closed; The movable and fixed molds are opened, the pre-pushing plate (6) is separated from the pre-pushing guide block (7), and the oil cylinder (11) starts to increase pressure in the reverse direction to pull out the slider head (1). The positive ejection force given by the compressed spring (10) to the pre-pushing guide block (7) will simultaneously drive the ejector rod (9) to eject, so that the local deep cavity column platform of the product is ejected.

2. According to claim 1, a single-point pre-ejection mechanism for a deep cavity column of a large die-casting mold slider is characterized in that: The oil cylinder (11) is connected to one end of the slider seat (2), and the other end of the slider seat (2) is fixed to the slider head (1).

3. The single-point pre-ejection mechanism of a deep cavity column platform of a large die-casting mold slider according to claim 1, characterized in that: One end of the push rod (9) is inserted into the slot of the pre-pushing guide block (7), the pre-pushing guide block (7) is mounted on the slider seat (2), and the other end of the push rod (9) is inserted into the slider seat (2) and the slider head (1).

4. The single-point pre-ejection mechanism of a deep cavity column of a large die-casting mold slider according to claim 1, characterized in that: A positioning block (8) is arranged at the rear side of the pre-top guide block (7), the positioning block (8) is fixed on the slider seat (2), and a spring (10) is installed between the positioning block (8) and the pre-top guide block (7).

5. The single-point pre-ejection mechanism of a deep cavity column platform of a large die-casting mold slider according to claim 4, characterized in that: The spring (10) is installed in the grooves of the positioning block (8) and the pre-top guide block (7), and a column base (12) is arranged in the groove, and the spring (10) is passed through the column base (12).

6. The single-point pre-ejection mechanism of a deep cavity column platform of a large die-casting mold slider according to claim 1, characterized in that: The wedge block (5) is aligned with the slider seat (2), and the pre-pushing plate (6) is aligned with the pre-pushing guide block (7).

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