Die-casting die for upper column casing of steering gear

Abstract

The utility model discloses a die-casting die for an upper column casing of a steering gear. The die-casting die comprises an upper die base, a lower die base, an upper die core, a lower die core, a main insertion shaft die assembly, a secondary insertion shaft die assembly, a main side die assembly, a secondary side die assembly, a label changing assembly, a pouring assembly and a deslagging assembly. According to the utility model, die-casting batch label replacement can be realized more quickly, the production efficiency is improved, pouring and deslagging are combined with conventional and die assembly components, the design difficulty of pouring and deslagging is reduced, the overall complexity of the die is reduced, and the size of the die core is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the mould production and manufacturing field, concretely relates to the die casting die of the steering gear upper column cylinder. BACKGROUND

[0002] The steering gear upper column cylinder is an important component of the automobile steering system, the production mode of die casting can guarantee the structural strength, and the more complex structure can reduce the production cost. In the die casting die of the steering gear upper column cylinder at present, the batch number needs to be marked on each batch of die-cast steering gear upper column cylinder, therefore, the insert block that can be replaced needs to be arranged in the die, and the conventional insert block type replacement batch needs to disassemble the die, take out the insert block and then install the new insert block, so the disassembly is troublesome and affects the production.

[0003] Meanwhile, the current steering gear upper column cylinder die casting die independently sets the pouring of the aluminum liquid and the slag discharge, the die design difficulty is also larger, and meanwhile, the structure of the die is more complex, and the die volume inevitably increases. UTILITY MODEL CONTENTS

[0004] In view of the above defects of the prior art, the purpose of the utility model is to provide the die casting die of the steering gear upper column cylinder, and the die casting batch number replacement is more quickly realized, the production efficiency is improved, the pouring and the slag discharge are combined with the conventional and combined die assembly, the design difficulty of the pouring and the slag discharge is reduced, and meanwhile, the complexity of the die as a whole is reduced and the volume of the die core is reduced.

[0005] The purpose of the utility model is realized through the technical scheme:

[0006] The die casting die of the steering gear upper column cylinder comprises an upper die seat, a lower die seat, an upper die core, a lower die core, a main insert shaft combined die assembly, a secondary insert shaft combined die assembly, a main side combined die assembly, a secondary side combined die assembly, a replacement assembly, a pouring assembly and a slag discharge assembly.

[0007] The upper die core is arranged on the lower surface of the upper die seat, and the lower die core is arranged on the upper surface of the lower die core; after the upper die seat and the lower die seat are combined, a die cavity is formed in the upper die core and the lower die core;

[0008] The lower die seat is provided with mounting grooves in four directions for accommodating the main insert shaft combined die assembly, the secondary insert shaft combined die assembly, the main side combined die assembly and the secondary side combined die assembly; the combined die faces of the main insert shaft combined die assembly, the secondary insert shaft combined die assembly, the main side combined die assembly and the secondary side combined die assembly extend into the die cavity surrounded by the upper die core and the lower die core;

[0009] The upper die seat is provided with a through hole through which the replacement assembly passes; the upper die core is provided with a through hole penetrating the position opposite to the through hole; the head of the replacement assembly is fixed in the upper die core, and the printing surface of the head is exposed in the die cavity;

[0010] The sprue assembly is mounted on the main mold closing assembly, and the sprue is located on the inner wall of the mold cavity; the slag removal assembly is mounted on the secondary mold closing assembly, and the slag removal channel is located on the inner wall of the mold cavity.

[0011] Furthermore, the main insert shaft mold closing assembly has a main insert shaft at its closing end, and the end of the main insert shaft is provided with a positioning groove; the secondary insert shaft mold closing assembly has a secondary insert shaft at its closing end, and the end of the secondary insert shaft is provided with a positioning protrusion that matches the positioning groove; after the main insert shaft mold closing assembly and the secondary insert shaft mold closing assembly are closed, the positioning protrusion is inserted into the positioning groove, and the end face of the main insert shaft abuts against the end face of the secondary insert shaft.

[0012] Furthermore, the gating assembly includes:

[0013] The sprue base is mounted on the slider of the main side mold clamping assembly;

[0014] The enclosure is fitted over the pouring base, with a gap between the inner wall of the enclosure and the side of the pouring base; the lower end of the enclosure has a notch.

[0015] The sprue is located inside the mold cavity, with its head end connected to the notch and its tail end located on the outer surface of the main insert shaft at the mold closing end of the main insert shaft mold closing assembly.

[0016] Furthermore, the gating system includes:

[0017] The main road connects to the gap at its beginning;

[0018] Two branch channels are connected at their head ends to the tail end of the main channel. The tail ends are located on the outer surface of the main insert shaft at the mold closing end of the main insert shaft mold closing assembly. The tail ends of the two branch channels are symmetrically arranged around the axis of the main insert shaft at the mold closing end of the main insert shaft mold closing assembly. The two branch channels are respectively arranged on the inner surfaces of the upper mold core and the lower mold core.

[0019] Furthermore, the end of the branch channel is flat-nozzle shaped and wraps around the cylindrical surface of the main insert shaft at the mold closing end of the main insert shaft mold closing assembly; the end of the branch channel is directly opposite the head end face of the upper column of the die-cast steering gear.

[0020] Furthermore, the slag discharge assembly includes:

[0021] The slag discharge seat is located on the side of the slider of the secondary mold clamping assembly and is fixedly connected to the slider of the secondary mold clamping assembly.

[0022] The main slag discharge channel is located inside the mold cavity, with its head facing the tail end of the upper cylinder of the die-cast steering gear, and its tail end is connected to the slag discharge seat.

[0023] The secondary slag discharge channel is located inside the mold cavity, with its head facing the end face of the mounting plate of the upper column of the die-cast steering gear, and its tail end connected to the slag discharge seat.

[0024] Furthermore, the main slag discharge channel includes four main slag cavities, which are uniformly arranged in a circular array around the axis of the upper cylinder of the die-cast steering gear; the head end of each main slag cavity is flat-mouth shaped and communicates with the tail end face of the upper cylinder of the die-cast steering gear; the tail ends of the three main slag cavities located on the same side as the slag discharge seat are connected to the slag discharge seat through the main discharge channel.

[0025] Furthermore, the secondary slag discharge channel includes four secondary slag chambers, which are divided into two groups and set on the end faces of the two mounting plates of the upper cylinder of the die-cast steering gear. The head end of the secondary slag chamber is flat-nosed and communicates with the two mounting plates of the upper cylinder of the die-cast steering gear, and the tail end communicates with the slag discharge seat through the secondary discharge channel.

[0026] Furthermore, the through holes and perforations form a stepped hole shape; the diameter of the perforations is larger than that of the through holes;

[0027] The relabeling component includes:

[0028] The head end of the marker passes through the through hole and is located inside the upper mold core, while the tail end is located on the outer surface of the upper mold base.

[0029] The label head is connected to the head end of the label rod, and the labeling surface of the label head is exposed inside the mold cavity; the label head is interference-fitted with the perforation.

[0030] The pusher mechanism is set on the upper mold base; when the pusher mechanism is working, it squeezes the tail end of the marker rod, forcing the marker rod to squeeze the marker head along the through hole, forcing the marker head to separate from the through hole.

[0031] Furthermore, the upper mold base is provided with a sliding groove, one end of which is exposed and the other end is directly opposite the tail end of the marker.

[0032] The bidding organization includes:

[0033] A push rod is set in a groove, with an inclined surface at its head end, the normal of which points to the marker rod; the tail end of the marker rod is rounded, and its height does not exceed the highest point of the inclined surface on the push rod.

[0034] A stop block is provided on the upper mold base to cover the exposed end of the slide groove; the stop block has a through hole in the middle facing the slide groove;

[0035] The reset rod has a T-shaped outer contour, and its tail end passes through a through hole and connects to the push rod.

[0036] The return spring is sleeved on the return rod, with its two ends abutting against the head end of the return rod and the stop block, respectively.

[0037] Due to the adoption of the above technical solution, this utility model has the following advantages:

[0038] 1. The batch label blocks are inserted into the mold cavity through the upper mold base and the upper mold core using an insert method. Compared with the conventional insert label block method, this method has the advantage of faster label block replacement, reduces the workload of label block replacement, and improves mold utilization efficiency.

[0039] 2. By integrating the gating and slag removal design with the mold closing assembly, the slag removal material and the gating head can be automatically separated from the mold when the mold closing assembly retracts. At the same time, there is no need to design separate gating and slag removal structures, which can greatly reduce the space used in the mold and make the mold volume significantly smaller.

[0040] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[0041] The accompanying drawings of this utility model are described below:

[0042] Figure 1 This is a three-dimensional structural diagram of the die-casting mold for the upper column of the steering gear in this embodiment.

[0043] Figure 2 This is a three-dimensional structural diagram of the main insertion shaft mold closing assembly, the secondary insertion shaft mold closing assembly, the main side mold closing assembly, and the secondary side mold closing assembly in this embodiment.

[0044] Figure 3 This is a bottom view of the main insert shaft mold closing assembly, the secondary insert shaft mold closing assembly, the main side mold closing assembly, and the secondary side mold closing assembly in this embodiment.

[0045] Figure 4 for Figure 3 Schematic diagram of the AA section structure.

[0046] Figure 5 for Figure 4 Enlarged structural diagram at point B.

[0047] Figure 6 This is a schematic diagram of the first three-dimensional structure of the upper mold core in this embodiment.

[0048] Figure 7 This is a schematic diagram of the second three-dimensional structure of the upper mold core in this embodiment.

[0049] Figure 8 This is a bottom view of the upper mold core in this embodiment.

[0050] Figure 9 This is a schematic diagram of the first three-dimensional structure of the lower mold core in this embodiment.

[0051] Figure 10 This is a schematic diagram of the second three-dimensional structure of the lower mold core in this embodiment.

[0052] Figure 11 This is a front view schematic diagram of the lower mold core in this embodiment.

[0053] Figure 12 This is a three-dimensional structural diagram of the pouring assembly, slag discharge assembly, and upper cylinder of the steering gear in this embodiment.

[0054] Figure 13 This is a top view of the pouring assembly, slag discharge assembly, and upper column of the steering gear in this embodiment.

[0055] Figure 14 for Figure 13 Schematic diagram of the C-section structure.

[0056] Figure 15 This is a three-dimensional structural diagram of the upper mold base, upper mold core, and label changing component in this embodiment.

[0057] Figure 16 This is a top view of the upper mold base, upper mold core, and label changing assembly in this embodiment.

[0058] Figure 17 for Figure 16 Schematic diagram of the cross-sectional structure of DD.

[0059] Figure 18 for Figure 17 Enlarged structural diagram at point E in the middle.

[0060] Figure 19 for Figure 17 Enlarged structural diagram at point F.

[0061] Figure 20 for Figure 17 Enlarged structural diagram at point G in the middle.

[0062] In the diagram: 1. Upper mold base; 11. Through hole; 12. Slide groove; 2. Lower mold base; 3. Upper mold core; 31. Through hole; 4. Lower mold core; 5. Main insert shaft mold closing assembly; 51. Main insert shaft; 511. Positioning groove; 6. Secondary insert shaft mold closing assembly; 61. Secondary insert shaft; 611. Positioning protrusion; 7. Main side mold closing assembly; 8. Secondary side mold closing assembly; 91. Marker; 92. Marker head; 921. Marking surface; 931. Push rod; 9311. Inclined surface; 932. Stop block; 9321. Through hole; 933. Reset rod; 934. Reset spring; 101. Inlet base; 102. Enclosure; 1021. Notch; 1031. Main channel; 1032. Branch channel; 201. Slag discharge seat; 2021. Main slag cavity; 2022. Main discharge channel; 2031. Secondary slag cavity; 2032. Secondary discharge channel; 300. Mold cavity; 400. Upper column of the steering gear; 401. Mounting plate; 402. Marking. Detailed Implementation

[0063] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0064] Example:

[0065] like Figures 1 to 20 As shown, the die-casting mold for the upper column cylinder 400 of the steering gear includes an upper mold base 1, a lower mold base 2, an upper mold core 3, a lower mold core 4, a main insert shaft mold assembly 5, a secondary insert shaft mold assembly 6, a main side mold assembly 7, a secondary side mold assembly 8, a label changing assembly, a gating assembly, and a slag removal assembly;

[0066] The upper mold core 3 is disposed on the lower surface of the upper mold base 1, and the lower mold core 4 is disposed on the upper surface of the lower mold core 4; after the upper mold base 1 and the lower mold base 2 are closed, a mold cavity 300 is formed in the upper mold core 3 and the lower mold core 4.

[0067] The lower mold base 2 is provided with mounting slots in four directions to accommodate the main insert shaft mold assembly 5, the secondary insert shaft mold assembly 6, the main side mold assembly 7, and the secondary side mold assembly 8; the mold closing surfaces of the main insert shaft mold assembly 5, the secondary insert shaft mold assembly 6, the main side mold assembly 7, and the secondary side mold assembly 8 extend into the mold cavity 300 surrounded by the upper mold core 3 and the lower mold core 4;

[0068] The upper mold base 1 is provided with a through hole 11 for the label changing assembly to pass through; the upper mold core 3 is provided with a through hole 31 opposite to the through hole 11; the label head 92 of the label changing assembly is fixed inside the upper mold core 3, and the label printing surface 921 of the label head 92 is exposed inside the mold cavity 300.

[0069] The sprue assembly is mounted on the main side mold closing assembly 7, and the sprue is located on the inner wall of the mold cavity 300; the slag removal assembly is mounted on the secondary side mold closing assembly 8, and the slag removal channel is located on the inner wall of the mold cavity 300.

[0070] The batch marker blocks are inserted into the mold cavity 300 through the upper mold base 1 and upper mold core 3 using an insert method. Compared with the conventional insert marker block method, this method has the advantage of faster marker block replacement, reducing the workload of marker block replacement and improving mold utilization efficiency. By integrating the gating and slag removal design with the mold closing assembly, the slag removal material and gating head can be automatically separated from the mold when the mold closing assembly retracts. At the same time, there is no need to design separate gating and slag removal structures, which can greatly reduce the space required for the mold and significantly reduce the mold volume.

[0071] In this embodiment, the main insert shaft mold clamping assembly 5, the secondary insert shaft mold clamping assembly 6, the main side mold clamping assembly 7, and the secondary side mold clamping assembly 8 adopt the conventional mold clamping assembly structure, namely, the structure of hydraulic cylinder, fixed seat, and slider. The specific structure and contour are adjusted according to actual needs.

[0072] In this embodiment, the main insert shaft mold closing assembly 5 has a main insert shaft 51 at its closing end, and the end of the main insert shaft 51 is provided with a positioning groove 511; the secondary insert shaft mold closing assembly 6 has a secondary insert shaft 61 at its closing end, and the end of the secondary insert shaft 61 is provided with a positioning protrusion 611 that matches the positioning groove 511; after the main insert shaft mold closing assembly 5 and the secondary insert shaft mold closing assembly 6 are closed, the positioning protrusion 611 is inserted into the positioning groove 511, and the end face of the main insert shaft 51 abuts against the end face of the secondary insert shaft 61.

[0073] The main insert shaft 51 and the secondary insert shaft 61 are interlocked (with limiting protrusions and limiting grooves) to form a complete cylindrical cavity. Reducing the length of the insert shaft can reduce the possibility of bending during use and enhance the service life of the mold.

[0074] In this embodiment, the gating assembly includes:

[0075] The injection base 101 is mounted on the slider of the main side mold clamping assembly 7;

[0076] The support 102 is fitted over the pouring base 101, and a gap is left between the inner wall of the support 102 and the side of the pouring base 101; the lower end of the support 102 is provided with a notch 1021.

[0077] The sprue is located inside the mold cavity 300, with its head end connected to the notch 1021 and its tail end located on the outer surface of the main insert shaft 51 at the mold closing end of the main insert shaft mold closing assembly 5.

[0078] The gating system includes:

[0079] Main road 1031, its head end connects to gap 1021;

[0080] Two branch channels 1032 are connected at their head ends to the tail ends of the main channel 1031. The tail ends are located on the outer surface of the main insertion shaft 51 at the mold closing end of the main insertion shaft mold closing assembly 5. The tail ends of the two branch channels 1032 are symmetrically arranged around the axis of the main insertion shaft 51 at the mold closing end of the main insertion shaft mold closing assembly 5. The two branch channels 1032 are respectively arranged on the inner surfaces of the upper mold core 3 and the lower mold core 4.

[0081] The end of the branch channel 1032 is flat and wraps around the cylindrical surface of the main insert shaft 51 at the mold closing end of the main insert shaft mold closing assembly 5; the end of the branch channel 1032 is directly opposite the head end face of the die-cast steering gear upper column cylinder 400.

[0082] By placing the gating base 101 on the main side mold clamping assembly 7, the occupancy of the gating system on the mold core is reduced, allowing for a significant reduction in mold volume. Setting the molten aluminum outlet at the head end face of the die-casting deflector cylinder 400 allows the molten aluminum to quickly fill the entire mold cavity 300, and the flow rate of the molten aluminum within the mold cavity 300 is more uniform, improving die-casting quality.

[0083] In this embodiment, the slag discharge assembly includes:

[0084] The slag discharge seat 201 is disposed on the side of the slider of the secondary mold clamping assembly 8 and is fixedly connected to the slider of the secondary mold clamping assembly 8.

[0085] The main slag discharge channel is located inside the mold cavity 300, with its head facing the tail end face of the upper column cylinder 400 of the die-cast steering gear, and its tail end is connected to the slag discharge seat 201.

[0086] The secondary slag discharge channel is located inside the mold cavity 300, with its head facing the end face of the mounting plate 401 of the upper column cylinder 400 of the die-casting steering gear, and its tail end connected to the slag discharge seat 201.

[0087] In this embodiment, the main slag discharge channel includes four main slag cavities 2021, which are uniformly arranged in a circular array around the axis of the die-cast steering gear upper cylinder 400; the head end of the main slag cavities 2021 is flat-mouth shaped and communicates with the tail end face of the die-cast steering gear upper cylinder 400; the tail ends of the three main slag cavities 2021 located on the same side as the slag discharge seat 201 are connected to the slag discharge seat 201 through the main discharge channel 2022.

[0088] In this embodiment, the secondary slag discharge channel includes four secondary slag cavities 2031, which are divided into two groups and set on the end faces of the two mounting plates 401 of the upper cylinder 400 of the die-cast steering gear. The head end of the secondary slag cavities 2031 is flat-mouth shaped and communicates with the two mounting plates 401 of the upper cylinder 400 of the die-cast steering gear. The tail end is connected to the slag discharge seat 201 through the secondary discharge channel 2032.

[0089] A main slag discharge channel is installed in the direction directly opposite to the aluminum molten aluminum outlet of the die-casting steering gear upper column 400, which effectively concentrates and collects waste slag. Simultaneously, based on the structural characteristics of the die-casting steering gear upper column 400, a secondary slag discharge channel is installed at the wing-shaped mounting plate 401 to quickly discharge waste slag formed in this structure, ensuring the structural strength. The slag discharge seat 201 adopts the structural form of application number 202421747696X, with a corrugated cavity inside, which effectively accommodates waste slag and maintains the pressure within the die cavity 300.

[0090] In this embodiment, the through hole 11 and the perforation 31 form a stepped hole shape; the diameter of the perforation 31 is larger than that of the through hole 11;

[0091] The relabeling component includes:

[0092] The head end of the marker 91 passes through the through hole 11 and the through hole 31 and is located inside the upper mold core 3, while the tail end is located on the outer surface of the upper mold base 1.

[0093] The label head 92 is connected to the head end of the label rod 91, and the labeling surface 921 of the label head 92 is exposed inside the mold cavity 300; the label head 92 is interference-fitted with the through hole 31;

[0094] The pusher mechanism is set on the upper mold base 1. When the pusher mechanism is working, it squeezes the tail end of the marker rod 91, forcing the marker rod 91 to squeeze the marker head 92 along the through hole 11, forcing the marker head 92 to separate from the through hole 31.

[0095] The upper mold base 1 is provided with a sliding groove 12, one end of which is exposed and the other end is directly opposite the tail end of the marker 91.

[0096] The bidding organization includes:

[0097] Push rod 931 is set in slide groove 12, with an inclined surface 9311 at the head end, the normal of the inclined surface 9311 pointing to the marker 91; the tail end of the marker 91 is rounded, and its height does not exceed the highest point of the inclined surface 9311 on the push rod 931.

[0098] A stop block 932 is provided on the upper mold base 1 to cover the exposed end of the slide groove 12; the stop block 932 has a through hole 9321 in the middle facing the slide groove 12;

[0099] The reset rod 933 has a T-shaped outer contour, and its tail end passes through the through hole 9321 and connects to the push rod 931.

[0100] The reset spring 934 is sleeved on the reset rod 933, and its two ends abut against the head end of the reset rod 933 and the stop block 932, respectively.

[0101] By using an interference fit between the label head 92 and the upper mold core 3, the sealing between the label head 92 and the upper mold core 3 can be guaranteed during the die casting process. When it is necessary to change the label, the label rod 91 is pressed by the push rod 931, which causes the label head 92 to separate from the upper mold core 3. Compared with the conventional structure for changing inserts, this avoids the operation of disassembling and separating the upper mold core 3 and the upper mold base 1, which greatly improves the replacement efficiency.

[0102] In this embodiment, the die-casting mold for the upper column cylinder 400 of the steering gear is used as follows: the upper mold base 1 and the lower mold base 2 are separated, exposing the mold cavity 300. At this time, the push-reset rod 933 is pressed down, forcing the inclined surface 9311 of the push rod 931 to press the upper end of the marker rod 91. Under the pressure, the marker rod 91 presses down on the marker head 92. Finally, the marker head 92 is disengaged from the upper mold core 3, releasing the pressure on the reset rod 933. The reset rod 933 is then reset under the action of the reset spring 934. The marker head 92 corresponding to the mark is selected and inserted into the mold cavity 300 surface of the upper mold core 3 with an interference fit for installation.

[0103] The upper mold base 1 and the lower mold base 2 are closed, and then the die casting process is carried out. The mold cavity 300 is evacuated, and then aluminum liquid is poured into the mold cavity 300 through the gating assembly. The waste slag enters the slag discharge assembly. After the die-cast steering gear upper column cylinder 400 cools down, the upper mold assembly and the lower mold base 2 are separated, and the die-cast steering gear upper column cylinder 400 can be taken out.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A die-casting mould for a steering column tube, characterised in that The application relates to a die assembly for die casting a steering wheel of a vehicle, which comprises an upper die base, a lower die base, an upper die core, a lower die core, a main shaft die assembly, a secondary shaft die assembly, a main side die assembly, a secondary side die assembly, a label changing assembly, a feeding assembly and a slag discharging assembly. The upper die core is arranged on the lower surface of the upper die base, and the lower die core is arranged on the upper surface of the lower die base; after the upper die base and the lower die base are combined, a die cavity is formed in the upper die core and the lower die core; The lower die base is provided with installation grooves in four directions for accommodating the main shaft die assembly, the secondary shaft die assembly, the main side die assembly and the secondary side die assembly; the die combining surfaces of the main shaft die assembly, the secondary shaft die assembly, the main side die assembly and the secondary side die assembly extend into the die cavity surrounded by the upper die core and the lower die core; The upper die base is provided with a through hole for the label changing assembly to pass through; the upper die core is provided with a through hole at a position opposite to the through hole; the label head of the label changing assembly is fixed in the upper die core, and the printing surface of the label head is exposed in the die cavity; The feeding assembly is arranged on the main side die assembly, and a feeding channel is arranged on the inner wall of the die cavity; the slag discharging assembly is arranged on the secondary side die assembly, and a slag discharging channel is arranged on the inner wall of the die cavity.

2. The die casting mold for a steering column upper shaft of claim 1, wherein, The die combining end of the main shaft die assembly is a main shaft, and the end of the main shaft is provided with a positioning groove; the die combining end of the secondary shaft die assembly is a secondary shaft, and the end of the secondary shaft is provided with a positioning protrusion matched with the positioning groove; after the main shaft die assembly and the secondary shaft die assembly are combined, the positioning protrusion is inserted into the positioning groove, and the end surface of the main shaft is abutted with the end surface of the secondary shaft.

3. The die casting mold for a steering column upper shaft tube according to claim 1, characterized by, The feeding assembly comprises: a feeding base arranged on the sliding block of the main side die assembly; a surrounding base sleeved on the feeding base, and a gap is left between the inner wall of the surrounding base and the side surface of the feeding base; the lower end of the surrounding base is provided with a notch; a feeding channel arranged in the die cavity, a head end communicated with the notch, and a tail end located on the outer surface of the main shaft of the die combining end of the main shaft die assembly.

4. The die casting mold for a steering column upper shaft tube according to claim 3, characterized by The feeding channel comprises: a main channel, a head end communicated with the notch; two branch channels, a head end communicated with the tail end of the main channel, and a tail end located on the outer surface of the main shaft of the die combining end of the main shaft die assembly; the tail ends of the two branch channels are symmetrically arranged around the axis of the main shaft of the die combining end of the main shaft die assembly; the two branch channels are respectively arranged on the inner surfaces of the upper die core and the lower die core.

5. The die casting mold for a steering column upper shaft tube according to claim 4, characterized by The tail end of the branch channel is flat and is wrapped on the cylindrical surface of the main shaft of the die combining end of the main shaft die assembly; the tail end of the branch channel is opposite to the head end surface of the upper cylinder of the steering wheel.

6. The die casting mold for a steering column upper shaft tube according to claim 1, characterized by The slag discharging assembly comprises: a slag discharging base arranged on the side surface of the sliding block of the secondary side die assembly and fixed with the sliding block of the secondary side die assembly; a main slag discharging channel arranged in the die cavity, a head end opposite to the tail end surface of the upper cylinder of the steering wheel, and a tail end communicated with the slag discharging base; a secondary slag discharging channel arranged in the die cavity, a head end opposite to the end surface of the mounting plate of the upper cylinder of the steering wheel, and a tail end communicated with the slag discharging base.

7. The die casting mold for a steering column upper shaft tube according to claim 6, characterized by The main slag discharging channel comprises four main slag package cavities which are uniformly arranged in a circumferential array around the axis of the upper cylinder of the steering wheel; the head end of the main slag package cavity is flat and communicated with the tail end surface of the upper cylinder of the steering wheel; the tail ends of the three main slag package cavities on the same side of the slag discharging base are communicated with the slag discharging base through a main slag channel.

8. The die casting mold for a steering column upper shaft tube according to claim 6, characterized by The secondary slag discharge channel comprises four secondary slag pockets arranged on the end faces of two installation plates of the die-cast steering knuckle upper column cylinder, and the front end of the secondary slag pocket is flat-mouthed and communicates with the two installation plates of the die-cast steering knuckle upper column cylinder, and the tail end communicates with the slag discharge seat through a secondary discharge channel.

9. The die casting mold for a steering column upper shaft tube according to claim 1, characterized by, The through hole and the perforation form a stepped hole; the diameter of the perforation is larger than that of the through hole; The label changing assembly comprises: a label rod, the head end of which is located in the upper mold core through the through hole and the perforation, and the tail end of which is located on the outer surface of the upper mold seat; a label head connected with the head end of the label rod, the printing surface of the label head being exposed in the mold cavity; the label head is in interference fit with the perforation; a label pushing mechanism arranged on the upper mold seat; the label pushing mechanism extrudes the tail end of the label rod when working, forces the label rod to extrude the label head along the through hole, and forces the label head to separate from the perforation.

10. The transfer mold for a steering column upper shaft tube of claim 9, wherein, The upper mold seat is provided with a sliding groove, one end of the sliding groove being exposed and the other end being opposite to the tail end of the label rod; The label pushing mechanism comprises: a push rod arranged in the sliding groove, the head end of the push rod being provided with an inclined surface, the normal line of the inclined surface pointing to the label rod; the tail end of the label rod is rounded, and the height is not higher than the highest point of the inclined surface of the push rod; a stop block arranged on the upper mold seat and shielding the exposed end of the sliding groove; the stop block is provided with a through hole opposite to the sliding groove in the middle part; a reset rod, the outer contour of which is T-shaped, the tail end of the reset rod being connected with the push rod through the through hole; a reset spring, the outer contour of which is T-shaped, the tail end of the reset rod being connected with the push rod through the through hole;

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