Powder metallurgy lock core precision assembly integrated forming die

Abstract

The utility model relates to the field of powder metallurgy discloses a kind of powder metallurgy lock cylinder precision assembly integrated forming die, including movable template, the upper surface axial center of movable template is equipped with powder inlet, the upper surface of movable template is fixedly installed with top die bin around, the lower surface of movable template is detachably connected with movable mould, the lower surface of movable mould is detachably connected with fixed mould, the lower surface of fixed mould is provided with cooling assembly, the left and right sides of cooling assembly are both provided with auxiliary assembly, cooling assembly includes cooling bin, the front surface of cooling bin is fixedly installed with cold strip. In the utility model, through the cooperation of cooling bin, heat absorption column, cold strip and other parts in equipment, realize "heat absorption-heat dissipation" two-stage path, the temperature of fixed mould temperature demoulding interval is rapidly cooled, and the finished product time is greatly shortened, and the stability of the size accuracy of forming piece is improved.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy, and in particular to an integrated molding die for a precision component of a powder metallurgy lock core. Background Technology

[0002] Powder metallurgy lock cores have become the mainstream manufacturing method for mid-to-high-end locks due to their complex shapes, high dimensional accuracy, and large batch production. Existing technologies generally adopt a "split mold + external cooling" solution: the upper and lower molds are positioned by guide pillars, the powder is filled into the cavity through the central injection port, and then compacted by a press; after forming, the mold as a whole is moved to an external water-cooling or air-cooling station for cooling, and then manually demolded.

[0003] The above-mentioned device has the following defects: the mold is separated from the cooling medium, the heat needs to be conducted through multiple stages of the mold body and mold base, the cooling time is as long as 40 to 60 seconds, the single-piece cycle is long, the production capacity is limited, and the external cooling causes a significant temperature difference gradient between the upper and lower parts of the mold, resulting in uneven radial and axial shrinkage of the lock core and an assembly clearance deviation rate as high as 3% to 5%. To solve the above problems, a powder metallurgy lock core precision component integrated molding mold is proposed. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides an integrated molding die for a precision component of a powder metallurgy lock core, which aims to improve the problems of low cooling efficiency and large dimensional drift in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a precision mold for powder metallurgy lock core components, comprising a movable template, a powder inlet at the center of the upper surface of the movable template, a top mold chamber fixedly installed around the upper surface of the movable template, a movable mold detachably connected to the lower surface of the movable template, a fixed mold detachably connected to the lower surface of the movable mold, a cooling assembly provided on the lower surface of the fixed mold, auxiliary components provided on both the left and right sides of the cooling assembly, the cooling assembly comprising a cooling chamber, a cooling strip fixedly installed on the front surface of the cooling chamber, a button fixedly installed on the left end of the outer surface of the cooling strip, multiple sets of heat-absorbing columns fixedly installed at the center of the interior of the cooling chamber, the multiple sets of heat-absorbing columns being connected by condensation channel pipes, and multiple sets of heat dissipation fins fixedly installed on the front and rear surfaces of the inner wall of the cooling chamber.

[0006] As a further description of the above technical solution: the auxiliary component includes an auxiliary plate, a plurality of motors are fixedly mounted on the left surface of the auxiliary plate, a fan is fixedly mounted on the output shaft of the motor, an auxiliary air duct is opened on the upper surface of the auxiliary plate, and a plurality of through slots are opened on the left surface of the auxiliary plate near the front side of the motor.

[0007] As a further description of the above technical solution: the outer surface of the cooling chamber has multiple sets of evenly distributed ventilation holes.

[0008] As a further description of the above technical solution: the top of the heat-absorbing column is in contact with the lower surface of the fixed mold.

[0009] As a further description of the above technical solution: the interior of the cooling chamber is configured as a hollow structure, and the top corner of the outer surface of the cooling chamber is configured as a rounded corner structure.

[0010] As a further description of the above technical solution: the powder inlet is located at the center of the upper surface of the moving mold.

[0011] As a further description of the above technical solution: the cooling chamber is fixedly installed on the lower surface of the fixed mold.

[0012] As a further description of the above technical solution: the auxiliary plate is fixedly installed on the left and right ends of the cooling chamber.

[0013] This utility model has the following beneficial effects: 1. In this utility model, by utilizing the interconnections of components such as the cooling chamber, heat absorption column, and cooling strip in the equipment, a two-stage "heat absorption-heat dissipation" path is achieved, which rapidly cools the temperature in the demolding range of the fixed mold temperature, significantly shortens the finished product time, and improves the stability of the dimensional accuracy of the molded parts.

[0014] 2. In this utility model, the auxiliary plate, air duct, ventilation hole and other components in the equipment cooperate with each other through the connection relationship. The air is blown in a direction through the auxiliary air duct to the ventilation hole, and the forced air circulation removes the residual heat on the surface of the cooling chamber and heat dissipation fins, reduces the local temperature gradient, prevents thermal deformation, and the through slot supports maintenance without stopping the machine and ensures continuous production. Attached Figure Description

[0015] Figure 1 This is a front view of the main body of the integrated molding die for a precision powder metallurgy lock core component proposed in this utility model. Figure 2 This is a side view of the main body of a powder metallurgy lock core precision component integrated molding die proposed in this utility model. Figure 3 This is a schematic diagram of the internal area of ​​the cooling chamber of a precision mold for a powder metallurgy lock core component. Figure 4 This is a partial schematic diagram of the auxiliary plate of the integrated molding die for a precision powder metallurgy lock core component proposed in this utility model.

[0016] Legend: 1. Moving mold plate; 2. Powder inlet; 3. Top mold chamber; 4. Moving mold; 5. Fixed mold; 6. Cooling assembly; 61. Cooling chamber; 62. Cooling strip; 63. Button; 64. Heat dissipation fins; 65. Heat absorption column; 66. Condensation channel; 7. Auxiliary assembly; 71. Auxiliary plate; 72. Auxiliary air duct; 73. Motor; 74. Fan; 75. Ventilation hole; 76. Through slot. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Reference Figure 1 - Figure 3 This utility model provides an embodiment of a precision mold for a powder metallurgy lock core, comprising a movable template 1. The movable template 1 serves as the top force-bearing reference plate of the entire mold, bearing and transmitting the closing force of the press; it also serves as the installation reference for the top mold chamber 3 and the movable mold 4, ensuring the coaxiality and parallelism of each part. A powder inlet 2 is provided at the axial center of the upper surface of the movable template 1. The setting of the powder inlet 2 ensures that the powder fills the cavity evenly under the action of gravity and vibration, avoiding segregation. The powder inlet 2 is located at the axial center of the upper surface of the movable mold 4. A top mold chamber 3 is fixedly installed around the upper surface of the movable template 1, forming a closed space with the movable template 1, accommodating the demolding mechanism (not shown) and guide components; providing vertical support for the finished product during the demolding stage. The ejection stroke of the moving mold prevents jamming. The lower surface of the moving mold plate 1 is detachably connected to the moving mold 4. The moving mold 4 and the fixed mold 5 are paired to form the upper part of the precision cavity of the lock core. The detachable structure facilitates the replacement of worn parts and quick cleaning of residual powder. The lower surface of the moving mold 4 is detachably connected to the fixed mold 5. The fixed mold 5 and the moving mold 4 are paired to form the lower part of the precision cavity of the lock core. The lower surface is directly attached to the cooling component 6 to achieve rapid cooling and shaping after molding. The lower surface of the fixed mold 5 is provided with the cooling component 6. The cooling component 6 is set as an integral water-air mixed cooling unit. It quickly removes the heat of the fixed mold 5 through a three-stage path of heat absorption, heat dissipation and heat exhaust, shortening the single-piece cycle and improving dimensional stability. Auxiliary components 7 are provided on both the left and right sides of the cooling component 6.

[0019] Reference Figure 2 - Figure 4The cooling assembly 6 includes a cooling chamber 61, which is fixedly installed on the lower surface of the fixed mold 5. The cooling chamber 61 is a hollow, thin-walled shell that serves as a storage and guiding cavity for the cooling medium. Rounded corners reduce stress concentration and prevent cracking due to long-term temperature fluctuations. The interior of the cooling chamber 61 is hollow, and the outer surface corners are rounded. A cooling exchange strip 62 is fixedly installed on the front surface of the cooling chamber 61. The cooling exchange strip 62 allows for continuous cooling medium replacement via a quick-connect coupling, ensuring continuous production. A button 63 is fixedly installed on the left end of the outer surface of the cooling exchange strip 62. The button 63 is the on / off switch for the cooling exchange strip 62, providing one-button control of the coolant flow and facilitating safe medium replacement by the operator while the mold is hot. Multiple sets of heat-absorbing columns 65 are fixedly installed at the core of the cooling chamber 61. The heat-absorbing columns 65 are arrays of high thermal conductivity copper alloy columns, with their tops close to the lower surface of the fixed mold 5, directly absorbing and transferring heat from the mold downwards. The tops of the heat-absorbing columns 65 are in contact with the lower surface of the fixed mold 5. The multiple sets of heat-absorbing columns 65 are connected by condensation channels 66. The condensation channels 66 connect the serpentine pipes of each heat-absorbing column 65, and the internal circulation of coolant forms a continuous closed heat exchange path to achieve uniform cooling. Multiple sets of heat dissipation fins 64 are fixedly installed on the front and rear surfaces of the inner wall of the cooling chamber 61. The heat dissipation fins 64 are used to increase the contact area between the inner wall of the cooling chamber 61 and the air, improving the efficiency of natural convection heat dissipation; at the same time, they serve as auxiliary heat dissipation fins for the heat-absorbing columns 65.

[0020] Reference Figure 2 - Figure 4 The auxiliary component 7 includes an auxiliary plate 71. The auxiliary component 7 works in conjunction with the cooling component 6, using high-speed airflow to remove heat from the surface of the heat dissipation fins 64 and the cooling chamber 61. The auxiliary plate 71 supports the motor 73 and the fan 74 and is fixedly connected to the cooling chamber 61, ensuring accurate positioning of the fan 74 and the ventilation vent 75. The auxiliary plate 71 is fixedly installed on both the left and right ends of the cooling chamber 61. Multiple sets of motors 73 are fixedly installed on the left surface of the auxiliary plate 71. The motors 73 provide power to the fans 74, possessing wide voltage and low temperature rise characteristics, suitable for long-term continuous operation. The output shaft of the motors 73 is fixedly mounted with the fans 74, which are axial flow blades, generating 2-3 m / s. The laminar airflow quickly removes hot air from the surface of the cooling chamber 61, reducing the local temperature gradient. An auxiliary air duct 72 is provided on the upper surface of the auxiliary plate 71. The auxiliary air duct 72 is located in the guide groove on the upper surface of the auxiliary plate 71, which directs the high-speed airflow generated by the fan 74 into the ventilation hole 75 to avoid turbulence loss. Multiple sets of evenly distributed ventilation holes 75 are provided on the outer surface of the cooling chamber 61. The ventilation holes 75 form an inlet-outlet air circulation channel, allowing external cold air to continuously enter and internal hot air to be discharged in time. Multiple sets of through slots 76 are provided on the left surface of the auxiliary plate 71 near the front of the motor 73. The through slots 76 are used for quick plugging and unplugging of the power cord and control cord of the motor 73, and also serve as maintenance windows for easy cleaning of accumulated dust.

[0021] Working principle: The moving mold plate 1 descends under the drive of the press slide, utilizing the rigidity of its top force-bearing reference plate to evenly transmit the mold-closing force to the moving mold 4 and the fixed mold 5. The top mold chamber 3 is fixedly connected to the moving mold plate 1, providing a closed guiding space for the internal demolding mechanism, ensuring the coaxiality and parallelism of the mold closing. Powder raw material is injected from the powder inlet 2, which is located at the axis of the moving mold 4, allowing the powder to evenly fill the lock core precision cavity formed by the moving mold 4 and the fixed mold 5 under the action of gravity and vibration, avoiding component segregation. The press continues to apply pressure, and the cavity of the moving mold 4 and the fixed mold 5 closes, completing high-density molding. At this time, the cooling component 6 has not yet been activated, but the cooling chamber 61 is in close contact with the lower surface of the fixed mold 5 through the top of the heat-absorbing column 65, forming an initial heat conduction channel, reserving a path for subsequent rapid cooling.

[0022] After the pressure holding period, the circulating coolant enters the condensation channel 66 through the heat exchange bar 62, flows along the serpentine pipe through each heat absorption column 65, and the high thermal conductivity copper alloy heat absorption column 65 rapidly dissipates the heat from the mold 5, achieving uniform cooling of the cavity. The coolant, after absorbing heat, diffuses within the hollow cavity of the cooling chamber 61, and the heat is naturally released into the air through the significantly expanded surface area of ​​the heat dissipation fins 64. The auxiliary component 7 starts simultaneously: the motor 73 drives the fan 74 to rotate, generating a laminar airflow of 2-3 m / s. The auxiliary air duct 72 directs the airflow into the ventilation hole 75, forming a forced air circulation of "continuous entry of external cold air - immediate exhaust of internal hot air". The auxiliary plate 71 acts as a rigid support to ensure accurate positioning of the fan 74 and the ventilation hole 75, and the through slot 76 provides a window for quick plugging and unplugging of the power cord and cleaning of accumulated dust.

[0023] After cooling, the press returns to its original position, and the moving platen 1 drives the moving mold 4 upward. The top mold chamber 3 ejects the lock core product from the cavity through a vertical ejection stroke, preventing mold jamming. The detachable moving mold 4 and fixed mold 5 facilitate quick replacement of worn parts and cleaning of residual powder. The side button 63 on the cooling strip 62 allows for one-button opening and closing of the coolant channel. When it is necessary to change the cooling medium without stopping the machine, the operator can quickly insert or remove the cooling strip 62 while the mold is hot, ensuring continuous operation of the production line.

[0024] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precision mold for powder metallurgy lock core components, comprising a movable template (1), characterized in that: The upper surface of the moving template (1) is provided with a powder inlet (2) at the center of the axis. The upper surface of the moving template (1) is fixedly installed with a top mold chamber (3) around the perimeter. The lower surface of the moving template (1) is detachably connected with a moving mold (4). The lower surface of the moving mold (4) is detachably connected with a fixed mold (5). The lower surface of the fixed mold (5) is provided with a cooling component (6). The left and right sides of the cooling component (6) are provided with auxiliary components (7). The cooling assembly (6) includes a cooling chamber (61), a cooling strip (62) is fixedly installed on the front surface of the cooling chamber (61), a button (63) is fixedly installed on the left end of the outer surface of the cooling strip (62), a plurality of heat-absorbing columns (65) are fixedly installed at the inner axis of the cooling chamber (61), the plurality of heat-absorbing columns (65) are connected to each other through a condensation channel (66), and a plurality of heat dissipation fins (64) are fixedly installed on both the front and rear surfaces of the inner wall of the cooling chamber (61).

2. The integral molding mold for a precision powder metallurgy lock core component according to claim 1, characterized in that: The auxiliary component (7) includes an auxiliary plate (71). Multiple motors (73) are fixedly installed on the left surface of the auxiliary plate (71). A fan (74) is fixedly installed on the output shaft of the motor (73). An auxiliary air duct (72) is opened on the upper surface of the auxiliary plate (71). Multiple through slots (76) are opened on the left surface of the auxiliary plate (71) near the front side of the motor (73).

3. The integral molding mold for a precision powder metallurgy lock core component according to claim 1, characterized in that: The outer surface of the cooling chamber (61) has multiple sets of evenly distributed ventilation holes (75).

4. The integral molding mold for a precision powder metallurgy lock core component according to claim 1, characterized in that: The top of the heat-absorbing column (65) is in contact with the lower surface of the fixed mold (5).

5. The integral molding mold for a precision powder metallurgy lock core component according to claim 1, characterized in that: The interior of the cooling chamber (61) is configured as a hollow structure, and the top corner of the outer surface of the cooling chamber (61) is configured as a rounded corner structure.

6. The integral molding mold for a precision powder metallurgy lock core component according to claim 1, characterized in that: The powder inlet (2) is located at the center of the upper surface of the moving mold (4).

7. The integral molding mold for a precision powder metallurgy lock core component according to claim 1, characterized in that: The cooling chamber (61) is fixedly installed on the lower surface of the fixed mold (5).

8. The integral molding mold for a precision powder metallurgy lock core component according to claim 2, characterized in that: The auxiliary plate (71) is fixedly installed on the left and right ends of the cooling chamber (61).

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