Core pulling mechanism of casting machine capable of firstly ejecting and then pulling

Abstract

The utility model discloses a core-pulling mechanism of a casting machine capable of firstly ejecting and then pulling, which comprises a mold, wherein a mold mounting plate is fixed at the bottom of the mold; an iron core is arranged in the middle of the mold in a sliding mode, the bottom of the iron core is attached to the top of a core-pulling oil cylinder, the middle of the core-pulling oil cylinder penetrates through the middle of a limiting plate, the bottom of the core-pulling oil cylinder is fixed to the middle of a mounting plate through a screw, and ejector rods are fixed to the top end of the limiting plate at equal intervals. The top of the ejector rod extends into the mold to form a sliding mechanism, an ejector core oil cylinder is fixed to the side edge of the lower end of the limiting plate, and the bottom of the ejector core oil cylinder is fixed to the mounting plate through a screw. And a sealing structure is formed between the top of the ejector rod and an opening in the mold. According to the core-pulling mechanism capable of achieving ejection and then pulling of the casting machine, the ejection rod is installed, the ejection rod is driven by the ejection core oil cylinder to move, then the ejection rod ejects a workpiece in a mold conveniently, the workpiece is separated from an iron core, and therefore the situation that the workpiece is damaged due to difficult demolding is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of casting machines, in particular to a core pulling mechanism of a casting machine which first pushes up and then pulls out. Background Art

[0002] The core pulling of the pouring machine is a part of the manufacturing process of the pouring machine, especially in the production scenario where the core structure or material inside the mold needs to be removed. The core pulling mechanism is an important part of the pouring machine. It is responsible for smoothly removing the core structure or material inside the mold after the pouring is completed;

[0003] Reference publication number CN113579204A is a sub-die casting machine for a hollow aluminum cylinder of a motorcycle front shock absorber. It can fully ensure the internal and external quality requirements of the aluminum cylinder by applying appropriate thrust and speed to the aluminum liquid through bottom pouring, and has less aluminum material loss, less environmental pollution, and simple subsequent processing. It adopts PLC program to control semi-automatic production, and one person can operate 3 to 4 machines. The productivity is nearly 1 times higher than the current industry level, which greatly reduces the casting production cost; the mold adopts a ductile iron mold frame inlaid with an H13 mold core, and the outer dimensions of the mold core take into account the cavity occupation needs of aluminum cylinder blanks of different lengths and shapes. When casting aluminum cylinder blanks of different models, it only needs to dismantle and replace the mold core. The production adjustment is convenient and fast, and it is fully capable of organizing large-scale production, which can completely change the backward and passive situation of the original aluminum cylinder metal mold gravity casting, and make the front shock absorber manufacturing of my country's motorcycle industry step onto a new level. However, there are still the following problems:

[0004] In the actual use of the above device, although the purpose of demoulding can be achieved by core pulling, after the mold is opened, the core pulling cylinder pulls out the iron core to separate the casting from the iron core. The surface area of ​​the iron core of some molds is large, and the clamping force between the core and the casting is large, which makes demoulding difficult and easily damages the surface of the casting.

[0005] Therefore, we proposed a core-pulling mechanism for the pouring machine that pushes first and then pulls out, which can solve the above problems well. Utility Model Content

[0006] The utility model aims to provide a core-pulling mechanism for a pouring machine which first pushes and then pulls out, so as to solve the problem that in the current market, after the mold is opened, the core-pulling cylinder pulls out the iron core to separate the casting from the iron core. The surface area of ​​the iron core of some molds is large, and the clamping force between the core and the casting is large, which makes demoulding difficult and easily damages the surface of the casting.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a core-pulling mechanism of a pouring machine that first pushes up and then pulls out comprises a mold, and a mounting plate is fixed at the bottom of the mold;

[0008] Also includes:

[0009] An iron core is slidably arranged in the middle of the mold, and the bottom of the iron core is fitted with the top of the core-pulling cylinder, and the middle of the core-pulling cylinder passes through the middle of the limiting plate, the bottom of the core-pulling cylinder is fixed to the middle of the mounting plate by screws, and push rods are fixed at equal intervals on the top of the limiting plate, and the top of the push rods extends into the interior of the mold to form a sliding mechanism, a core-pull cylinder is fixed to the lower side of the limiting plate, and the bottom of the core-pull cylinder is fixed to the mounting plate by screws.

[0010] Preferably, a sealing structure is formed between the top of the ejector pin and the opening inside the mold, and the top end of the ejector pin is arranged parallel to the top end of the opening inside the mold.

[0011] Preferably, a sliding block is fixed to the bottom of the iron core, and the outer end of the sliding block extends into the interior of the sliding groove to form a locking mechanism, and the sliding groove is opened inside the core-pulling cylinder.

[0012] Preferably, a protrusion is slidably provided inside the sliding block, and the outer end of the protrusion is arranged in a semicircular shape.

[0013] Preferably, the outer end of the protrusion extends into the interior of the groove to form a locking mechanism, and the groove is opened inside the core-pulling cylinder.

[0014] Preferably, the inner end of the protrusion is connected to a spring, and the inner end of the spring is connected to the inside of the slider.

[0015] Preferably, the side of the slide groove is provided with an opening, and the diameter of the slide groove opening is larger than the diameter of the slider, and the openings of the slide groove are symmetrically arranged.

[0016] Compared with the prior art, the beneficial effects of the utility model are: the core-pulling mechanism of the pouring machine that first pushes and then pulls can avoid damage to the workpiece and facilitate replacement. By moving the ejector rod, it is easy to demould, thereby avoiding damage to the workpiece, and by rotating the slider, the iron core can be conveniently replaced. The specific contents are as follows:

[0017] (1) A push rod is provided, and the push rod is driven to move by the push core cylinder, so that the push rod can push the workpiece inside the mold, so that the workpiece can be separated from the iron core, thereby avoiding damage to the workpiece due to demolding difficulties;

[0018] (2) A slider is provided, and the slider can be driven to rotate by rotating the iron core, thereby causing the slider to disengage from the slide slot, so that the iron core can be replaced separately and conveniently;

[0019] (3) A convex block is provided, and the outer end of the convex block extends into the interior of the groove to form a locking mechanism, and the groove is opened inside the core-pulling cylinder, so that after the convex block and the groove are locked, the stability of the locking between the slider and the slide groove can be improved;

[0020] (4) A spring is provided, and the inner end of the protrusion is connected to the spring, and the inner end of the spring is connected to the inside of the slider, so that the spring can limit the protrusion, thereby improving the stability of the protrusion;

[0021] (5) A protrusion is provided, and the protrusion slides through the inside of the slider, and the outer end of the protrusion is provided in a semicircular shape, so that the protrusion can slide automatically after being squeezed by force. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the front section structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the front cross-section structure of the top rod of the utility model;

[0024] Figure 3 This is a schematic diagram of the three-dimensional structure of the mold of the utility model;

[0025] Figure 4 For this utility model Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the iron core of the utility model;

[0027] Figure 6 This is a schematic diagram of the top-sectional structure of the slider of the utility model;

[0028] Figure 7 It is a schematic diagram of the structure of the utility model after the iron core rotates.

[0029] In the figure: 1. mold; 2. mounting plate; 3. iron core; 4. core-pulling cylinder; 5. mounting plate; 6. core-pull cylinder; 7. limit plate; 8. ejector rod; 9. slider; 10. slide groove; 11. bump; 12. groove; 13. spring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] Embodiment 1:

[0032] The utility model solves the problem that after the existing mold 1 is opened, the core-pulling cylinder 4 pulls out the iron core 3 to separate the casting from the iron core 3. The surface area of ​​the iron core 3 of some molds 1 is large, and the clamping force between the iron core 3 and the casting is large, which makes demoulding difficult and easily damages the surface of the casting. The demoulding can be facilitated by moving the ejector rod 8.

[0033] A mold 1, a mounting plate 2 is fixed at the bottom of the mold 1; it also includes: an iron core 3 is slidably arranged in the middle of the mold 1, and the bottom of the iron core 3 is fitted with the top of the core-pulling cylinder 4, and the middle of the core-pulling cylinder 4 passes through the middle of the limit plate 7, the bottom of the core-pulling cylinder 4 is fixed to the middle of the mounting plate 5 by screws, and the top of the limit plate 7 is evenly fixed with a push rod 8, and the top of the push rod 8 extends into the interior of the mold 1 to form a sliding mechanism, a core-pushing cylinder 6 is fixed to the side of the lower end of the limit plate 7, and the bottom of the core-pull cylinder 6 is fixed to the mounting plate 5 by screws, a sealing structure is formed between the top of the push rod 8 and the opening inside the mold 1, and the top of the push rod 8 is arranged parallel to the top of the opening in the mold 1;

[0034] refer to Figures 1 to 3 , the limit plate 7 can be driven to move by the core-pushing cylinder 6, and then the limit plate 7 can be moved to drive the push rod 8 to move, and then the push rod 8 can be moved upward in the mold 1, and the workpiece in the mold 1 can be pushed by the movement of the push rod 8, and then the workpiece in the mold 1 can be moved upward inside the mold 1, and by contracting the core-pulling cylinder 4, the core-pulling cylinder 4 is contracted to drive the iron core 3 to contract, so that the iron core 3 can move downward inside the mold 1, and then the iron core 3 can be separated from the inside of the workpiece, so as to achieve the purpose of facilitating demoulding;

[0035] Embodiment 2:

[0036] The utility model solves the problem that the injection molding precision decreases due to the wear of the existing iron core 3. The iron core 3 can be easily replaced by rotating the slider 9. The utility model discloses:

[0037] A slider 9 is fixed to the bottom of the iron core 3, and the outer end of the slider 9 extends into the interior of the slide slot 10 to form a clamping mechanism, and the slide slot 10 is opened inside the core-pulling cylinder 4, and an opening is provided on the side of the slide slot 10, and the opening diameter of the slide slot 10 is larger than the diameter of the slider 9, and the openings of the slide slot 10 are symmetrically arranged;

[0038] refer to Figure 1 , Figures 4 to 7After the iron core 3 is worn, the iron core 3 is rotated to drive the slider 9 to rotate, and then the slider 9 is rotated to slide inside the slide groove 10, and then the iron core 3 is rotated to a suitable position, and then the slider 9 is disengaged from the slide groove 10, and then the iron core 3 is pulled, so that the iron core 3 moves and drives the slider 9 to move, and then the slider 9 is disengaged from the slide groove 10, and then the iron core 3 can be disengaged from the core-pulling cylinder 4, so that the iron core 3 can be disassembled, and the above operation is reversed, so that the iron core 3 can be quickly installed;

[0039] Embodiment three:

[0040] The utility model solves the problem that the engagement between the slider 9 and the slide groove 10 in the second embodiment is not stable enough. The engagement between the protrusion 11 and the groove 12 can improve the stability between the slider 9 and the slide groove 10. The utility model discloses:

[0041] A protrusion 11 slides inside the slider 9, and the outer end of the protrusion 11 is set in a semicircular shape. The outer end of the protrusion 11 extends into the inside of the groove 12 to form a clamping mechanism, and the groove 12 is opened inside the core-pulling cylinder 4. The inner end of the protrusion 11 is connected to a spring 13, and the inner end of the spring 13 is connected to the inside of the slider 9;

[0042] refer to Figure 1 , Figures 4 to 7 By rotating the slider 9, the slider 9 drives the protrusion 11 to rotate, and then the rotation of the protrusion 11 will be squeezed with the groove 12, so that the protrusion 11 is squeezed to slide into the inside of the slider 9, and the movement of the protrusion 11 will squeeze the spring 13, so that the spring 13 is compressed, and the movement of the protrusion 11 will be disengaged from the engagement with the groove 12, so that the slider 9 is disengaged from the engagement of the slide groove 10. The force of the spring 13 can push the protrusion 11 into the inside of the groove 12 to form an engagement, thereby improving the stability of the engagement between the slider 9 and the slide groove 10.

[0043] Working principle: When using the core pulling mechanism of the pouring machine, first refer to Figures 1 to 3 , the limit plate 7 can be driven to move by the core-pushing cylinder 6, and then the limit plate 7 moves to drive the push rod 8 to move, and then the workpiece in the mold 1 can move upward inside the mold 1, and by contracting the core-pulling cylinder 4, the core-pulling cylinder 4 contracts to drive the iron core 3 to contract, and then the iron core 3 can be separated from the inside of the workpiece, thereby achieving the purpose of facilitating demoulding;

[0044] refer to Figure 1 , Figures 4 to 7After the iron core 3 is worn, the iron core 3 is rotated to drive the slider 9 to rotate, and then the iron core 3 is rotated to a suitable position, and then the slider 9 is disengaged from the slide groove 10, and then the iron core 3 is pulled to move the iron core 3 and drive the slider 9 to move, and then the iron core 3 can be separated from the core-pulling cylinder 4, so that the iron core 3 can be disassembled, and the above operation is reversed, so that the iron core 3 can be quickly installed;

[0045] refer to Figure 1 , Figures 4 to 7 By rotating the slider 9, the slider 9 drives the protrusion 11 to rotate, and the movement of the protrusion 11 will squeeze the spring 13, so that the spring 13 is compressed, and the movement of the protrusion 11 will disengage from the engagement with the groove 12, so that the slider 9 can disengage from the engagement with the slide slot 10. The force of the spring 13 can push the protrusion 11 into the interior of the groove 12 to form an engagement, thereby improving the stability of the engagement between the slider 9 and the slide slot 10.

[0046] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0047] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A core pulling mechanism of a pouring machine that first pushes up and then pulls out, comprising a mold (1), wherein a mounting plate (2) is fixed at the bottom of the mold (1); It is characterized in that Also includes: An iron core (3) is slidably mounted in the middle of the mold (1), and the bottom of the iron core (3) is fitted with the top of the core-pulling cylinder (4), and the middle of the core-pulling cylinder (4) passes through the middle of the limit plate (7). The bottom of the core-pulling cylinder (4) is fixed to the middle of the mounting plate (5) by screws, and push rods (8) are fixed to the top of the limit plate (7) at equal intervals, and the top of the push rods (8) extends into the interior of the mold (1) to form a sliding mechanism. A core-pulling cylinder (6) is fixed to the lower side of the limit plate (7), and the bottom of the core-pulling cylinder (6) is fixed to the mounting plate (5) by screws.

2. The core-pulling mechanism of the pouring machine according to claim 1, characterized in that: A sealing structure is formed between the top of the push rod (8) and the opening inside the mold (1), and the top end of the push rod (8) is arranged parallel to the top end of the opening inside the mold (1).

3. The core-pulling mechanism of the pouring machine according to claim 1, characterized in that: A slider (9) is fixed to the bottom of the iron core (3), and the outer end of the slider (9) extends into the interior of a slide groove (10) to form a locking mechanism, and the slide groove (10) is arranged inside the core-pulling cylinder (4).

4. The core-pulling mechanism of the pouring machine according to claim 3, characterized in that: A convex block (11) is slidably disposed inside the sliding block (9), and the outer end of the convex block (11) is arranged in a semicircular shape.

5. The core-pulling mechanism of the pouring machine according to claim 4, characterized in that: The outer end of the protrusion (11) extends into the interior of the groove (12) to form a locking mechanism, and the groove (12) is provided inside the core-pulling cylinder (4).

6. The core-pulling mechanism of the pouring machine according to claim 5, characterized in that: The inner end of the protrusion (11) is connected to a spring (13), and the inner end of the spring (13) is connected to the inside of the slider (9).

7. The core-pulling mechanism of the pouring machine according to claim 3, characterized in that: The side of the slide groove (10) is provided with an opening, and the diameter of the opening of the slide groove (10) is larger than the diameter of the slider (9), and the openings of the slide groove (10) are symmetrically arranged.

Images