Single-oil-cylinder multi-extrusion-point die structure

Abstract

The utility model relates to a single-oil-cylinder multi-extrusion-point die structure which comprises an oil cylinder, a guide module and a fixed die core, a plurality of extrusion lining assemblies are fixedly arranged in the fixed die core, a plurality of guide columns are arranged on the outer side of the fixed die core, the guide module is located on the outer side of the fixed die core, and a plurality of extrusion pins are arranged on one side of the guide module. The extrusion pins are matched with the extrusion lining assemblies one by one, and the other side of the guide module is connected with the output end of the oil cylinder through a connecting piece; and the guide module is in sliding fit with the guide column, and is driven by the oil cylinder to linearly move relative to the fixed mold core, so that the plurality of extrusion pins penetrate through the corresponding extrusion bushing components to synchronously extrude to-be-extruded points of the inner cavity of the fixed mold core. Multi-point extrusion is realized through a single oil cylinder, so that the problem that a die casting has shrinkage cavity defects in multiple positions is solved. And the accuracy and the service life of the extrusion pin movement stroke are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of die casting moulds, in particular to a single oil cylinder multi-extrusion point mould structure. Background Art

[0002] The housing of new energy electric control machine has a complex design structure and needs to be installed with a circuit system inside. In order to cool the circuit system, the housing design needs to keep the assembly surface of the housing and the circuit board fully fitted, which will result in the inability to reduce the weight of the local thick area of ​​the product. The wall thickness of the local area can reach 20mm, far exceeding the average wall thickness of the product of 6mm. This leads to serious shrinkage holes inside the product after die-casting, causing air leakage in the entire cavity of the product, which cannot meet the product functional requirements.

[0003] To solve the problem of uneven wall thickness of such die castings, local extrusion is usually performed in the thick area. Local extrusion usually involves directly installing a cylinder in the mold to directly pressurize the area where shrinkage cavities are generated to suppress shrinkage cavities and obtain high-quality die casting products. Since there are usually multiple thick areas, the existing extrusion structure is a single cylinder driving a separate extrusion pin for local pressurization. If multiple cylinder structures are arranged, due to the close proximity of the positions, there will be installation interference between the cylinders, and the cylinders cannot be arranged, so the problem of shrinkage cavities in multiple locations cannot be completely solved. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a single-cylinder multi-extrusion point die structure, the purpose of which is to achieve multi-point extrusion through a single cylinder to solve the problem of shrinkage defects in multiple positions of die-castings.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A single-cylinder multi-extrusion point die structure, comprising a cylinder, a guide module and a fixed die core, wherein a plurality of extrusion bushing assemblies are fixedly arranged in the fixed die core, a plurality of guide columns are arranged on the outside of the fixed die core, the guide module is located on the outside of the fixed die core, a plurality of extrusion pins are arranged on one side of the guide module, the plurality of extrusion pins are matched with the plurality of extrusion bushing assemblies one by one, and the other side of the guide module is connected to the output end of the cylinder through a connecting piece;

[0007] The guide module is slidably matched with the guide column, and moves linearly relative to the fixed mold core under the drive of the oil cylinder, so that a plurality of extrusion pins pass through the corresponding extrusion bushing assemblies and synchronously extrude the to-be-extruded points in the inner cavity of the fixed mold core.

[0008] Further technical solutions are:

[0009] The structure of the guide module is as follows: it includes an upper connecting plate and a lower connecting plate, the upper connecting plate and the lower connecting plate are fixedly connected to form a mounting seat, a mounting groove for fixing the extrusion pin is formed in the mounting seat, and a guide sleeve for cooperating with the guide column is provided on the mounting seat.

[0010] The connecting piece is a holding ring, one end of which is connected to the output end of the oil cylinder through a slot, and the other end of the holding ring is fixed in the central hole of the lower connecting plate.

[0011] One end of the guide column is connected to the mounting seat, and the other end is provided with a limiting end, and the limiting end is used to prevent the guide column from escaping from the guide sleeve.

[0012] The extrusion pin has a three-section structure, including a first section, a second section and a third section whose diameters increase successively along the axial direction;

[0013] The structure of the extrusion bushing assembly includes a front bushing and a rear bushing, wherein the front bushing is used to be clearance-matched with the first section of the extrusion pin with a first clearance, and the first clearance is 0.04-0.06 mm;

[0014] The rear section bushing is used to cooperate with the second section of the extrusion pin with a second gap, and the second gap is larger than the first gap.

[0015] The rear end of the rear bushing is connected to the fixed mold core through a fixing block, and the front end of the rear bushing is tightly pressed together with the rear end of the front bushing along the axial direction.

[0016] The oil cylinder is fixed in the fixed mold frame.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model can perform local extrusion on multiple positions at the same time through one oil cylinder, thereby solving the problem of limited installation space of multiple oil cylinders, saving the number of oil cylinders and reducing mold costs.

[0019] The utility model improves the accuracy of the path of the extrusion pin during the movement process through the guide module, thereby avoiding the problems of extrusion deviation and movement jamming during the movement process.

[0020] The extrusion pin of the utility model is designed as a three-section structure. The third section has the largest diameter, which increases the strength of the force-bearing point of the extrusion pin and avoids deformation and breakage of the extrusion pin when subjected to force. The second section and the rear section bushing have a clearance to avoid air, reducing the wear of the extrusion pin in the longer fitting range. The first section and the front section bushing are precisely matched, and the fitting clearance is 0.04-0.06mm, ensuring that aluminum skin does not enter the extrusion bushing during repeated extrusion, thereby extending the service life.

[0021] Other features and advantages of the present invention will be described in the following description or will be understood by implementing the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of the utility model.

[0023] Figure 2 It is a main cross-sectional view of an embodiment of the utility model.

[0024] Figure 3 for Figure 1 The schematic diagram of the remaining structure after removing the fixed mold core is hidden in the middle.

[0025] Figure 4 It is a cross-sectional view of the matching structure of the extrusion bushing assembly and the extrusion pin according to an embodiment of the utility model.

[0026] In the figure: 1. fixed mold core; 2. holding ring; 3. oil cylinder; 4. extrusion pin; 5. guide module; 6. rear bushing; 7. front bushing; 8. guide sleeve; 9. guide column; 10. fixing block; 51. upper connecting plate; 52. lower connecting plate. DETAILED DESCRIPTION

[0027] The specific implementation of the present utility model is described below with reference to the accompanying drawings.

[0028] See also Figures 1 to 3 The single-cylinder multi-extrusion point mold structure of this embodiment includes a cylinder 3, a guide module 5 and a fixed mold core 1. A plurality of extrusion bushing assemblies are fixedly arranged in the fixed mold core 1. A plurality of guide columns 9 are arranged on the outside of the fixed mold core 1. The guide module 5 is located on the outside of the fixed mold core 1. A plurality of extrusion pins 4 are arranged on one side of the guide module 5. The plurality of extrusion pins 4 are matched with a plurality of extrusion bushing assemblies one by one. The other side of the guide module 5 is connected to the output end of the cylinder 3 through a connector.

[0029] The guide module 5 is slidably matched with the guide column 9, and moves linearly relative to the fixed mold core 1 under the drive of the cylinder 3, so that a plurality of extrusion pins 4 pass through the corresponding extrusion bushing assemblies and synchronously extrude the points to be extruded in the inner cavity of the fixed mold core 1.

[0030] The structure of the guide module 5 is as follows: it includes an upper connecting plate 51 and a lower connecting plate 52, which are fixedly connected to form a mounting seat, in which a mounting groove for fixing the extrusion pin 4 is formed, and the mounting seat is provided with a guide sleeve 8 for cooperating with the guide column 9.

[0031] In this embodiment, a plurality of extrusion pins are arranged through the guide module, and the extrusion pins cooperate with the extrusion bushing assembly at the same time. The guide module can perform linear motion under the drive of the oil cylinder and the guidance of the guide column, so that the plurality of extrusion pins are synchronously extruded toward a plurality of extrusion points under the guidance of the extrusion bushing assembly to complete the pressurizing action.

[0032] By setting up the plate guide module, the extrusion pin can be more precise in its movement, thus avoiding problems such as extrusion deviation and movement jamming during the movement.

[0033] As a specific implementation, the connecting member is a holding ring 2, one end of the holding ring 2 is connected to the output end of the oil cylinder 3 through a slot, and the other end of the holding ring 2 is fixed in the center hole of the lower connecting plate 52.

[0034] As a specific implementation, one end of the guide column 9 is connected to the mounting seat, and the other end is provided with a limiting end, and the limiting end is used to prevent the guide column 9 from escaping from the guide sleeve 8 during movement.

[0035] The guide column 9 can specifically be a connecting bolt.

[0036] See also Figure 4 The extrusion pin 4 is a three-section structure, including a first section, a second section and a third section whose diameters increase successively along the axial direction, and is connected to the guide module 5 through the tail end of the third section.

[0037] The structure of the extrusion bushing assembly includes a front bushing 7 and a rear bushing 6. The front bushing 7 is used to cooperate with the first section of the extrusion pin 4 with a first gap, and the first gap is 0.04-0.06mm; the rear bushing 6 is used to cooperate with the second section of the extrusion pin 4 with a second gap, and the second gap is larger than the first gap.

[0038] The rear end of the rear bushing 6 is connected to the fixed mold core 1 through a fixing block 10 , and the front end of the rear bushing 6 is tightly pressed with the rear end of the front bushing 7 along the axial direction.

[0039] The extrusion pin of this embodiment is designed as a three-section structure. The third section has the largest diameter, which increases the strength of the force-bearing point of the extrusion pin and avoids deformation and breakage of the extrusion pin when subjected to force. The second section and the rear section bushing have a clearance to avoid air, reducing the wear of the extrusion pin in the longer fitting range. The first section and the front section bushing are precisely matched with a clearance of 0.04-0.06mm to ensure that aluminum skin does not enter the extrusion bushing during repeated extrusion, thereby extending the service life.

[0040] As a specific implementation, the oil cylinder 3 is fixed in a fixed mold frame (not shown in the figure).

[0041] As a specific implementation, the assembly process of the single-cylinder multi-extrusion point mold structure of this embodiment includes the following process:

[0042] (1) Install the extrusion bushing assembly. First install the front bushing 7 and limit the front end by the step structure in the fixed mold core 1; then press the rear bushing 6 onto the bushing 7, and finally use the fixing block 10 to lock and fix the rear bushing 6;

[0043] (2) Install the guide sleeves 8 with four guide columns 9 in the center and the three extrusion pins 4 in the corresponding mounting holes of the upper connecting plate 51, install the holding ring 2 in the center hole of the lower connecting plate 52, then combine the upper and lower connecting plates and tighten them with four screws;

[0044] (3) Insert the extrusion pin 4 into the extrusion bushing, and at the same time connect the four guide pillars 9 to the fixed mold core 1 and lock them;

[0045] (4) Connect the oil cylinder 3 and the holding ring 2 through the slot, and install the oil cylinder 3 in the connection hole of the fixed mold frame with screws;

[0046] (5) The oil circuit and signal of the oil cylinder are connected. The oil cylinder 3 moves forward under the oil pressure, and drives the guide module 5 to move along the direction of the guide column 9 through the holding ring 2, so that the extrusion pin 4 pressurizes the thick area of ​​the fixed mold core 1 in the extrusion bushing, and the pressurization action of the three positions is completed at the same time.

[0047] See also Figure 1 During the solidification process of the casting, when the molten metal is in a semi-solid state in the cavity of the fixed mold core 1, pressure is applied to the thick part of the cavity through the extrusion pin 4 to force shrinkage compensation to reduce or eliminate the shrinkage cavity defect at that position and solve the leakage problem in the cavity.

[0048] Those skilled in the art can understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single-cylinder multi-extrusion point die structure, characterized in that: The invention comprises an oil cylinder (3), a guide module (5) and a fixed mold core (1), wherein a plurality of extrusion bushing assemblies are fixedly arranged in the fixed mold core (1), a plurality of guide columns (9) are arranged on the outer side of the fixed mold core (1), the guide module (5) is located on the outer side of the fixed mold core (1), a plurality of extrusion pins (4) are arranged on one side of the guide module (5), the plurality of extrusion pins (4) are matched with the plurality of extrusion bushing assemblies one by one, and the other side of the guide module (5) is connected to the output end of the oil cylinder (3) through a connecting piece; The guide module (5) is slidably matched with the guide column (9) and, driven by the oil cylinder (3), moves linearly relative to the fixed mold core (1), so that a plurality of extrusion pins (4) pass through corresponding extrusion bushing assemblies and synchronously extrude toward the to-be-extruded point in the inner cavity of the fixed mold core (1).

2. The single-cylinder multi-extrusion point die structure according to claim 1 is characterized in that: The structure of the guide module (5) is as follows: it comprises an upper connecting plate (51) and a lower connecting plate (52), wherein the upper connecting plate (51) and the lower connecting plate (52) are fixedly connected to form a mounting seat, wherein a mounting groove for fixing the extrusion pin (4) is formed in the mounting seat, and a guide sleeve (8) for cooperating with the guide column (9) is provided on the mounting seat.

3. The single-cylinder multi-extrusion point die structure according to claim 2 is characterized in that: The connecting piece is a holding ring (2), one end of the holding ring (2) is connected to the output end of the oil cylinder (3) via a slot, and the other end of the holding ring (2) is fixed in the center hole of the lower connecting plate (52).

4. The single-cylinder multi-extrusion point die structure according to claim 2 is characterized in that: One end of the guide column (9) is connected to the mounting seat, and the other end is provided with a limiting end, wherein the limiting end is used to prevent the guide column (9) from falling out of the guide sleeve (8).

5. The single-cylinder multi-extrusion point die structure according to claim 1 is characterized in that: The extrusion pin (4) has a three-section structure, comprising a first section, a second section and a third section, the diameters of which increase in sequence along the axial direction; The structure of the extrusion bushing assembly comprises a front bushing (7) and a rear bushing (6), wherein the front bushing (7) is used to be clearance-matched with the first section of the extrusion pin (4) with a first clearance, and the first clearance is 0.04-0.06 mm; The rear section bushing (6) is used to cooperate with the second section of the extrusion pin (4) with a second gap, and the second gap is larger than the first gap.

6. The single-cylinder multi-extrusion point die structure according to claim 5 is characterized in that: The rear end of the rear bushing (6) is connected to the fixed mold core (1) via a fixed block (10), and the front end of the rear bushing (6) is tightly pressed together with the rear end of the front bushing (7) along the axial direction.

7. The single-cylinder multi-extrusion point die structure according to claim 1 is characterized in that: The oil cylinder (3) is fixedly arranged in the fixed mold frame.

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