Auxiliary core-pulling structure for preventing casting from being adhered to fixed mold

Abstract

The utility model discloses an auxiliary core-pulling structure for preventing a casting from being adhered to a fixed die, which relates to the technical field of die casting and comprises a support, an oil cylinder component is arranged outside the support, the telescopic end of the oil cylinder component penetrates through the support and is provided with a connecting piece, the other end of the connecting piece is connected with a sliding block, and the other end of the sliding block is provided with a core-pulling die core. The inner side of the top end of the core-pulling mold core is provided with an upper end pressure extension edge, and the inner side of the bottom of the core-pulling mold core is provided with a tail protrusion. According to the utility model, through the upper end pressing extension edge and the tail bulge which are arranged on the inner wall of the core-pulling mold core, a formed part is pressed by the upper end pressing extension edge during mold opening, so that the formed part cannot be adhered to the fixed mold core to move, and meanwhile, the core-pulling mold core is locked by the tail bulge, so that the front end of the core-pulling mold core is prevented from being subjected to upward force during mold opening; the core-pulling mold core-pulling structure has the advantages that the structure is simple and practical, the processing and manufacturing are convenient, the production cost is greatly reduced, the universality is high, and the popularization is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of die casting, in particular to an auxiliary core pulling structure for preventing castings from sticking to a fixed mold. Background Art

[0002] Molds are various molds and tools used in industrial production to obtain the required products by methods such as injection molding, blow molding, extrusion, die-casting or forging, smelting, and stamping. Molds are generally composed of male molds, female molds, core pulls, ejectors and other components. Factors affecting mold sticking include: die-casting process description, mold design, mold temperature, mold surface quality, filling temperature, chemical composition and quality of mold release agents, spraying process, etc., all of which have an important influence on mold sticking. When the die-casting operation process is normal, a new mold will stick. Although debugging the die-casting process and spraying can remedy the situation, if it is unstable, it means that the main reason is the casting structure design, mold design or manufacturing problems.

[0003] In the design process of existing molds, sometimes due to the influence of the casting structure, there is no position for setting the ejector on the side of the casting with greater clamping force, or the ejector is not allowed to be set due to the requirements of the function and appearance of the casting. When it is necessary to set the side of the casting with greater clamping force on the fixed mold side, the casting is easily brought to the fixed mold side without the action of external force, which causes the die casting to fail and affects the production quality of the casting. Utility Model Content

[0004] The utility model aims to solve the disadvantages of the existing mold in that, in the design process, sometimes due to the influence of the casting structure, there is no position for setting the ejector on the side with large clamping force of the casting, or the ejector is not allowed to be set due to the requirements of the function and appearance of the casting. When it is necessary to set the side with large clamping force of the casting on the fixed mold side, the casting is easily brought to the fixed mold side without the action of external force, which makes the die casting fail and affects the production quality of the casting. An auxiliary core pulling structure is proposed to avoid the casting from sticking to the fixed mold.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An auxiliary core pulling structure for preventing castings from sticking to a fixed mold comprises a support, a cylinder assembly is arranged on the outside of the support, a connecting piece is installed on the telescopic end of the cylinder assembly passing through the support, a slider is connected to the other end of the connecting piece, a core pulling mold core is installed on the other end of the slider, an upper end rolled edge is arranged on the inner side of the top end of the core pulling mold core, a tail protrusion is arranged on the inner side of the bottom of the core pulling mold core, a movable mold core is arranged below the core pulling mold core, and a clamping groove is arranged on the top of the movable mold core.

[0007] Preferably, a fixed mold core is arranged above the core-pulling mold core, a fixed mold base is installed at the bottom of the fixed mold core, and a pouring nozzle connected to an external device passes through the middle of the fixed mold core and the fixed mold base.

[0008] Preferably, the fixed mold base, fixed mold core, core-pulling mold core, movable mold core and movable mold base are assembled in sequence to form a product space, molded parts are cast inside the product space, and a mounting hole connected to the outside is opened on the outside of the fixed mold core.

[0009] Preferably, the cylinder assembly comprises a mounting bracket, a hydraulic cylinder and a core pulling rod, and the cylinder assembly is distributed in two groups.

[0010] Preferably, an ejector pin is provided through the middle of the movable mold base and the movable mold core, and an ejection mechanism is provided at the bottom of the ejector pin.

[0011] Preferably, the ejection mechanism comprises a lower panel, a through slot, a limiting rod and a pushing plate, and a sliding slot is provided in the middle of the lower panel.

[0012] Preferably, the push plate is vertically connected to the ejector pins, and the ejector pins are provided in multiple groups.

[0013] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0014] 1. In the utility model, the upper end rolled edge and the tail protrusion arranged on the inner wall of the core-pulling mold core can press the molded parts through the upper end rolled edge when the mold is opened, so that the molded parts will not stick to the fixed mold core and move. At the same time, the core-pulling mold core is locked by the tail protrusion to avoid the core-pulling mold core being subjected to an upward force at the front end when the mold is opened, causing the core-pulling mold core to tilt toward the fixed mold direction, affecting the production quality of the molded parts. The structure is simple and practical, convenient for processing and manufacturing, greatly reduces the production cost, has strong universality, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional diagram of the support and the core-pulling mold core of the utility model;

[0016] Figure 2 It is a schematic diagram of the composition structure of the core-pulling mold core, the movable mold core and the fixed mold core in the utility model;

[0017] Figure 3 It is a schematic diagram of the enlarged structure of point A in the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the core-pulling mold core and the formed parts in the utility model.

[0019] Legend:

[0020] 1. Support; 2. Cylinder assembly; 3. Connector; 4. Slider; 5. Core-pulling mold core; 6. Molding part; 7. Fixed mold base; 8. Fixed mold core; 9. Moving mold core; 10. Moving mold base; 11. Ejector pin; 12. Tail protrusion; 13. Upper end rolled edge; 14. Snap-in groove; 15. Ejector mechanism; 1501. Lower panel; 1502. Through groove; 1503. Push plate; 1504. Limit rod; 16. Product space. DETAILED DESCRIPTION

[0021] 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 of 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.

[0022] In the description of the present invention, it should be noted that the terms "above", "below", "inner wall", "outer wall", "inside", "outside", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1-Figure 4 An auxiliary core-pulling structure for preventing castings from sticking to a fixed mold comprises a support 1, a cylinder assembly 2 is arranged outside the support 1, a connecting piece 3 is installed on the telescopic end of the cylinder assembly 2 passing through the support 1, a slider 4 is connected to the other end of the connecting piece 3, a core-pulling mold core 5 is installed on the other end of the slider 4, an upper end rolling edge 13 is arranged on the inner side of the top of the core-pulling mold core 5, a tail protrusion 12 is arranged on the inner side of the bottom of the core-pulling mold core 5, a movable mold core 9 is arranged below the core-pulling mold core 5, and a clamping groove 14 is arranged on the top of the movable mold core 9.

[0025] By adopting the above technical scheme, when the mold is opened, the upper end of the molded part 6 is subjected to the force of the upper end rolled edge 13 provided on the upper end of the core-pulling mold core 5, and the core-pulling mold core 5 is locked by cooperating with the clamping groove 14 on the movable mold core 9 through the tail protrusion 12 of the core-pulling mold core 5. This prevents the core-pulling mold core 5 from tilting toward the fixed mold when the front end of the core-pulling mold core 5 is subjected to the upward force, thereby affecting the size of the molded part 6. This structure can force the molded part 6 to stay in the product space 16 when the mold is opened, thereby solving the problem that the molded part 6 is easily brought to the fixed mold side when the clamping force on the fixed mold side is large.

[0026] Furthermore, a fixed mold core 8 is arranged above the core-pulling mold core 5, and a fixed mold base 7 is installed at the bottom of the fixed mold core 8. A pouring nozzle of an external device is connected to the middle of the fixed mold core 8 and the fixed mold base 7. The external device can be an extruder or an injection molding machine (the extruder or the injection molding machine is the existing technology, and its principle will not be described in detail), so that after the components are molded, the pouring nozzle extrude the molten material to fill the product space 16, and the product is obtained after cooling.

[0027] Furthermore, the fixed mold base 7, the fixed mold core 8, the core-pulling mold core 5, the movable mold core 9 and the movable mold base 10 are assembled in sequence to form a product space 16, and a molding part 6 is cast inside the product space 16. The fixed mold core 8 is provided with a mounting hole connected to the outside. Through the mounting hole on the fixed mold core 8, it is convenient to install the structure on the hydraulic parts of the external equipment, so as to facilitate the opening or closing operations of the fixed mold base 7, the fixed mold core 8 or the movable mold core 9 and the movable mold base 10.

[0028] Furthermore, the cylinder assembly 2 includes a mounting bracket, a hydraulic cylinder and a core pulling rod. The cylinder assembly 2 is distributed in two groups. Through the setting of the cylinder assembly 2, it is convenient to drive the core pulling mold 5 to open or close the mold.

[0029] Furthermore, an ejector pin 11 is provided through the middle of the movable mold base 10 and the movable mold core 9 , and an ejector mechanism 15 is provided at the bottom of the ejector pin 11 .

[0030] Furthermore, the ejection mechanism 15 includes a lower panel 1501, a through groove 1502, a limit rod 1504 and a push plate 1503. A sliding groove is provided in the middle of the lower panel 1501, and a through hole is provided below the sliding groove, so that the hydraulic parts of the external device pass through the through hole and are connected to the push plate 1503, which is convenient for driving the push plate 1503 to move in the sliding groove, thereby realizing the pushing work of the ejector 11.

[0031] Furthermore, the push plate 1503 is vertically connected to the ejector pin 11, and the ejector pin 11 is provided with multiple groups. Through the ejection mechanism 15, after the mold is opened, the push plate 1503 is driven by the external hydraulic parts to move in the sliding groove, and the ejector pin 11 is pushed into the product space 16 to eject the molded part 6 from the movable mold core 9 to realize the production cycle.

[0032] Working principle: When in use, firstly, the hydraulic parts of the external equipment on the cylinder assembly 2, the fixed mold base 7 and the ejection mechanism 15 are driven to successively close the core-pulling mold core 5, the fixed mold core 8, the fixed mold base 7 and the movable mold core 9, the movable mold base 10 to form a product space 16, and then, the molten material is extruded by the pouring nozzle installed on the fixed mold base 7 to fill the product space 16 to form a molded part 6 (the molded part 6 is also called a casting). When the filling is completed, the top edge of the molded part 6 is pressed by the upper end rolling edge 13 of the core-pulling mold core 5, so that when the hydraulic parts of the external equipment lift the fixed mold base 7 and the fixed mold core 8, the molded part 6 will remain on the movable mold side under the forced compression of the core-pulling mold core 5, and, through the setting of the tail protrusion 12 of the core-pulling mold core 5 and the clamping groove 14 on the movable mold core 9, When the mold is opened, the core-pulling mold core 5 is limited to the side of the movable mold and will not tilt toward the fixed mold core 8, which will not affect the size of the molded part 6, and is conducive to assisting the molded part 6 to quickly detach from the fixed mold side to avoid the molded part 6 sticking to the fixed mold. Finally, the hydraulic parts of the ejection mechanism 15 and the external equipment drive the push plate 1503 to move the ejector pin 11 toward the product space 16 to eject the molded part 6 from the movable mold side to achieve a normal production cycle. The above technical solution ensures the stability of the core pulling, the qualified size of the molded part 6 and the stability of the mold production (it should be noted that the specific model specifications of the electrical parts involved in this solution need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail).

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An auxiliary core-pulling structure for preventing a casting from sticking to a fixed mold, comprising a support (1), characterized in that: The support (1) is provided with a cylinder assembly (2) on the outside, the telescopic end of the cylinder assembly (2) passes through the support (1) and is installed with a connecting piece (3), the other end of the connecting piece (3) is connected to a slider (4), the other end of the slider (4) is installed with a core-pulling mold core (5), the inner side of the top end of the core-pulling mold core (5) is provided with an upper end rolling edge (13), the inner side of the bottom of the core-pulling mold core (5) is provided with a tail protrusion (12), a movable mold core (9) is provided below the core-pulling mold core (5), and a clamping groove (14) is provided on the top of the movable mold core (9).

2. The auxiliary core-pulling structure for preventing the casting from sticking to the fixed mold according to claim 1, characterized in that: A fixed mold core (8) is arranged above the core-pulling mold core (5), a fixed mold base (7) is installed at the bottom of the fixed mold core (8), and a pouring nozzle connected to an external device is penetrated through the middle of the fixed mold core (8) and the fixed mold base (7).

3. The auxiliary core-pulling structure for preventing the casting from sticking to the fixed mold according to claim 2, characterized in that: The fixed mold base (7), the fixed mold core (8), the core-pulling mold core (5), the movable mold core (9) and the movable mold base (10) are assembled in sequence to form a product space (16), a molded part (6) is cast inside the product space (16), and a mounting hole connected to the outside is opened on the outside of the fixed mold core (8).

4. The auxiliary core-pulling structure for preventing a casting from sticking to a fixed mold according to claim 1, characterized in that: The oil cylinder assembly (2) comprises a mounting bracket, a hydraulic oil cylinder and a core pulling rod, and the oil cylinder assembly (2) is distributed in two groups.

5. The auxiliary core-pulling structure for preventing the casting from sticking to the fixed mold according to claim 3, characterized in that: An ejector pin (11) is provided through the middle of the movable mold base (10) and the movable mold core (9), and an ejector mechanism (15) is provided at the bottom of the ejector pin (11).

6. The auxiliary core-pulling structure for preventing the casting from sticking to the fixed mold according to claim 5, characterized in that: The ejection mechanism (15) comprises a lower panel (1501), a through slot (1502), a limiting rod (1504) and a pushing plate (1503), and a sliding slot is arranged in the middle of the lower panel (1501).

7. The auxiliary core-pulling structure for preventing the casting from sticking to the fixed mold according to claim 6, characterized in that: The push plate (1503) is vertically connected to the ejector pins (11), and the ejector pins (11) are provided in multiple groups.

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