Lever type local extrusion mechanism of die-casting die

Abstract

The utility model discloses a lever type local extrusion mechanism of a die-casting die, which comprises a base, a cushion block is mounted on the base, a lower die is mounted above the cushion block, the lower die, the cushion block and the base are fixed through bolts, and a die core is mounted on the lower die. A fixing block is fixed to the lower end face of the lower die through a bolt and connected with the connecting rod, a hydraulic oil cylinder is fixed to the right side of the lower die through a bolt, a movable block is arranged in the lower die, and an in-die extrusion pin is vertically fixed to the movable block. According to the lever type local extrusion mechanism for the die-casting die, a connecting rod driving mechanism is adopted, the influence of die storage can be eliminated, a driving device is additionally arranged on the outer side of the die, so that position adjustment of the in-die extrusion pin is achieved, local pressurization can be conducted on a product through the effect of the in-die extrusion pin, and it is guaranteed that no shrinkage cavity exists in the die-casting aluminum alloy product; therefore, the production quality of products is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of die casting moulds, in particular to a lever-type local extrusion mechanism of a die casting mould. Background Art

[0002] Die casting is a metal casting process, which is characterized by using the inner cavity of the mold to apply high pressure to the molten metal to facilitate the rapid molding of the product. It is widely used in the production process of aluminum alloy products. However, in the actual process of existing die-casting molds for aluminum alloy products, when the aluminum alloy product has a small hollow cylindrical structure, it is impossible to design a direct extrusion mechanism inside the narrow mold due to the limitation of the mold size, which leads to shrinkage holes after the product is produced, thereby affecting the production quality of the product. Therefore, in view of the above problems, a lever-type local extrusion mechanism of a die-casting mold is designed to better meet the actual use needs. Utility Model Content

[0003] The utility model aims to provide a lever-type local extrusion mechanism for a die-casting mold, so as to solve the problem in the above-mentioned background technology that products are prone to shrinkage cavities and thus affect product quality.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a lever-type local extrusion mechanism of a die-casting mold, comprising a base, a cushion block is installed on the base, a lower mold is installed above the cushion block, the lower mold, the cushion block and the base are fixed by bolts, and a mold core is installed on the lower mold; a fixed block is fixed to the lower end surface of the lower mold by bolts, the fixed block is connected to a connecting rod, a hydraulic cylinder is fixed to the right side of the lower mold by bolts, a movable block is arranged in the lower mold, and an in-mold extrusion pin is vertically fixed on the movable block.

[0005] Preferably, four positioning columns are vertically fixed on the base, and the positioning columns and the lower mold are nested and connected. Through the nested positioning effect of the positioning columns and the lower mold, the relative position between the base and the lower mold can be limited to ensure the stability of the device assembly.

[0006] Preferably, a sleeve is fixed on the lower die, and four sleeves are provided. Through the action of the sleeve, the lower die and the upper die can be conveniently matched and positioned.

[0007] Preferably, a mounting block is fixed to the output end of the hydraulic cylinder, and a fixed shaft is connected to the bearing on the mounting block, and the fixed shaft and the connecting rod are slidably connected. Through the sliding action between the fixed shaft and the connecting rod and the telescopic action of the hydraulic cylinder, a basic force can be provided for the rotation of the connecting rod.

[0008] Preferably, the connecting rod and the fixed block are rotatably connected, and a sliding groove is provided on the connecting rod, and the normal operation of the device can be ensured through the rotation of the connecting rod and the fixed block.

[0009] Preferably, the movable block is slidably connected to the lower die, and the thickness of the movable block is smaller than the height of the cushion block. The sliding action between the movable block and the lower die can ensure the stability of the movement of the movable block.

[0010] Preferably, the movable block is also provided with a bearing connecting shaft, and the connecting shaft cooperates with a sliding groove on the connecting rod to slide. Through the above structure, a basic force can be provided for the movement of the movable block.

[0011] Preferably, the in-mold extrusion pins are slidably connected to the mold core, and three in-mold extrusion pins are provided. Through the action of the in-mold extrusion pins, the extrusion shaping of the product can be achieved, thereby effectively avoiding the shrinkage cavity phenomenon of the product and ensuring the product quality.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the lever-type local extrusion mechanism of the die-casting mold adopts a connecting rod driving mechanism, which can eliminate the influence of mold storage, and realize the position adjustment of the extrusion pin in the mold by adding a driving device on the outside of the mold. Through the action of the extrusion pin in the mold, the product can be locally pressurized to ensure that there are no shrinkage holes inside the die-cast aluminum alloy product, thereby effectively improving the production quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the device of the utility model;

[0014] Figure 2 This is a schematic diagram of the overall three-dimensional structure of the device of the utility model from top view;

[0015] Figure 3 This is a bottom-up three-dimensional structural diagram of the lower mold of the utility model;

[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the fixing block of the utility model;

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting rod of the utility model.

[0018] In the figure: 1. base; 101. positioning column; 2. cushion block; 3. lower mold; 301. sleeve; 4. mold core; 5. fixed block; 6. hydraulic cylinder; 601. mounting block; 602. fixed shaft; 7. connecting rod; 8. movable block; 801. connecting shaft; 9. in-mold extrusion pin. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-Figure 5 The utility model provides a technical solution: a lever-type local extrusion mechanism of a die-casting mold, including a base 1, a cushion block 2 is installed on the base 1, a lower mold 3 is installed above the cushion block 2, the lower mold 3, the cushion block 2 and the base 1 are fixed by bolts, and a mold core 4 is installed on the lower mold 3; a fixed block 5 is fixed to the lower end surface of the lower mold 3 by bolts, the fixed block 5 is connected to a connecting rod 7, a hydraulic cylinder 6 is fixed to the right side of the lower mold 3 by bolts, a movable block 8 is arranged in the lower mold 3, and an in-mold extrusion pin 9 is vertically fixed on the movable block 8.

[0021] Four positioning columns 101 are vertically fixed on the base 1, and the positioning columns 101 are nested with the lower mold 3; a sleeve 301 is also fixed on the lower mold 3, and four sleeves 301 are provided;

[0022] When using the die-casting die lever type partial extrusion mechanism, Figure 1 As shown, the whole device is first assembled. The relative position between the lower mold 3 and the base 1 can be ensured by nesting the positioning column 101 and the lower mold 3. With the function of the sleeve 301, it is convenient for the upper mold guide column and the sleeve 301 to cooperate for guidance, thereby ensuring the normal progress of the die casting.

[0023] The output end of the hydraulic cylinder 6 is fixed with a mounting block 601, and the mounting block 601 is bearing-connected with a fixed shaft 602, and the fixed shaft 602 is slidingly connected to the connecting rod 7; the connecting rod 7 is rotatably connected to the fixed block 5, and a slide groove is provided on the connecting rod 7; the movable block 8 is slidingly connected to the lower mold 3, and the thickness of the movable block 8 is less than the height of the cushion block 2; the movable block 8 is also bearing-connected with a connecting shaft 801, and the connecting shaft 801 can slide in cooperation with the slide groove on the connecting rod 7; the in-mold extrusion pin 9 is slidingly connected to the mold core 4, and three in-mold extrusion pins 9 are provided;

[0024] When performing aluminum alloy die casting, Figure 1-Figure 5As shown, first, the upper mold and the lower mold 3 are merged, and the metal liquid enters the mold core 4 for plasticization, and then the hydraulic cylinder 6 is started. The mounting block 601 and the fixed shaft 602 are driven downward by the hydraulic cylinder 6, and the sliding action between the fixed shaft 602 and the connecting rod 7 can make the connecting rod 7 rotate under force. When the connecting rod 7 rotates, the movable block 8 can slide upward under force through the sliding action between the slide groove on the connecting rod 7 and the connecting shaft 801, so that the in-mold extrusion pin 9 moves upward. At this time, the in-mold extrusion pin 9 is inserted into the aluminum alloy product on the mold core 4, and then the aluminum alloy product is locally pressurized, which effectively avoids the shrinkage cavity phenomenon of the aluminum alloy product, and then ensures the production quality of the product. This is the working principle of the lever-type local extrusion mechanism of the die-casting mold.

[0025] 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 die-casting mold lever-type local extrusion mechanism, comprising a base (1), a cushion block (2) mounted on the base (1), a lower mold (3) mounted above the cushion block (2), the lower mold (3), the cushion block (2) and the base (1) being fixed by bolts, and a mold core (4) mounted on the lower mold (3); characterized in that: A fixed block (5) is fixed to the lower end surface of the lower die (3) by bolts, and the fixed block (5) is connected to a connecting rod (7). A hydraulic cylinder (6) is fixed to the right side of the lower die (3) by bolts. A movable block (8) is arranged inside the lower die (3), and an in-die extrusion pin (9) is vertically fixed on the movable block (8).

2. The die-casting mold lever-type local extrusion mechanism according to claim 1, characterized in that: Four positioning columns (101) are also vertically fixed on the base (1), and the positioning columns (101) and the lower mold (3) are nested and connected.

3. The die-casting mold lever-type local extrusion mechanism according to claim 1, characterized in that: A sleeve (301) is also fixed on the lower mold (3), and four sleeves (301) are provided.

4. The die-casting mold lever-type local extrusion mechanism according to claim 1, characterized in that: A mounting block (601) is fixed to the output end of the hydraulic cylinder (6), and a fixed shaft (602) is connected to a bearing on the mounting block (601), and the fixed shaft (602) is slidably connected to the connecting rod (7).

5. The die-casting mold lever-type local extrusion mechanism according to claim 1, characterized in that: The connecting rod (7) and the fixed block (5) are rotatably connected, and a sliding groove is provided on the connecting rod (7).

6. The die-casting mold lever-type local extrusion mechanism according to claim 1, characterized in that: The movable block (8) is slidably connected to the lower mold (3), and the thickness of the movable block (8) is smaller than the height of the cushion block (2).

7. The die-casting mold lever-type partial extrusion mechanism according to claim 6, characterized in that: The movable block (8) also has a bearing connecting shaft (801), and the connecting shaft (801) cooperates with a sliding groove on the connecting rod (7) to slide.

8. The die-casting mold lever-type local extrusion mechanism according to claim 1, characterized in that: The in-mold extrusion pin (9) is slidably connected to the mold core (4), and three in-mold extrusion pins (9) are provided.

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