A mold changing auxiliary device for automotive parts molds

Abstract

This utility model discloses an auxiliary device for mold changing in automotive parts, relating to the field of automotive parts manufacturing technology. The device includes a frame with braked casters at the bottom. An upper slide rail assembly and a lower slide rail assembly are spaced apart along the height direction on the frame. A first slide rail assembly and a second slide rail assembly are hinged on the same side and can be rotated. The upper slide rail assembly is equipped with a slidable upper roller conveyor. The lower slide rail assembly is connected to a scissor-type hydraulic lift and the lower roller conveyor via a mounting plate. A hydraulic cylinder drives the mounting plate to slide. During operation, the slide rail assembly is rotated to reduce space. Mold changing is completed through alignment, receiving the old mold, and replacing it with a new mold, without the need for a translation device. Through layered arrangement, hinged mechanism, and guide and limiting structure, it achieves efficient and compact mold changing, improving production flexibility.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts manufacturing technology, and in particular to an auxiliary device for changing molds for automotive parts. Background Technology

[0002] In the automotive parts manufacturing industry, especially in the stamping of automotive interior parts (such as dashboard brackets and door clips), the multi-variety, small-batch production mode requires frequent mold changes based on product switching. These molds are usually relatively lightweight and have a flat, regular structure, which places high demands on mold change efficiency—OEMs generally require mold change response time to be controlled within 10 minutes to minimize losses caused by production line downtime.

[0003] Currently, the mainstream mold changing auxiliary equipment in the industry is mainly divided into two categories: One type is an independent mold-changing auxiliary device, which uses two separate mold-changing carts to handle the "old mold removal" and "new mold installation" processes respectively: one mold-changing cart first moves to the punch press to remove the old mold and transports it away. Only after it has completely left can the other mold-changing cart, carrying the new mold, enter the workstation to complete the installation of the new mold. In this mode, the two carts need to reserve dedicated passageways and parking areas, which significantly reduces the flexibility of the workshop layout. More importantly, the mold-changing process is forcibly divided into a serial step of "removing the old mold - removing it - installing the new mold," resulting in an excessively high proportion of idle time for the equipment, making it difficult to improve mold-changing efficiency.

[0004] Another type is the integrated mold-changing auxiliary device, which achieves "one car carrying two molds" by setting up two parallel stations on the same car body (the left station carries the old mold and the right station carries the new mold). However, in order to accommodate the two stations, this type of equipment often adopts a wide-body design, which significantly limits the flexibility of turning and shuttling in a complex production line composed of multiple punch presses. At the same time, since the two stations are arranged in parallel, the position of the car body needs to be repeatedly shifted to realign with the punch press opening when picking up the old mold and installing the new mold, which not only takes up space but also increases the number of positioning times, thus slowing down the mold-changing rhythm.

[0005] The aforementioned problems collectively cause a chain reaction of fragmented mold-changing processes and limited workshop space, making it difficult to meet the actual needs of rapid mold-changing in the stamping production of automotive interior parts. Utility Model Content

[0006] To address the aforementioned problems, the purpose of this utility model is to provide an auxiliary device for changing molds of automotive parts, thereby solving the problem of low efficiency caused by the fragmented mold changing process in existing auxiliary devices for changing molds.

[0007] The technical solution of this utility model is as follows: A mold changing auxiliary device for automotive parts includes a frame. At least four brake casters are provided at the bottom of the frame. An upper slide rail assembly and a lower slide rail assembly are spaced apart and parallel along the height direction of the frame. A first slide rail assembly and a second slide rail assembly are respectively hinged to the same side of the frame along its length direction. The upper and lower slide rail assemblies are the same length as the first and second slide rail assemblies. When the first and second slide rail assemblies are flipped towards the press to a docking state, the first slide rail assembly docks with the upper slide rail assembly with its rail surfaces flush, and the second slide rail assembly docks with the lower slide rail assembly. The upper slide rail group is connected and the rail surfaces are flush; an upper roller conveyor is slidably mounted on the upper slide rail group, and the upper roller conveyor can slide along the upper slide rail group to the first slide rail group; a mounting plate is slidably mounted on the lower slide rail group, and a hydraulic cylinder for driving the mounting plate to slide along the lower slide rail group is provided between the frame and the mounting plate. The hydraulic cylinder, the frame, and the mounting plate are all rotatably connected. A scissor-type hydraulic lift is provided on the mounting plate, and a lower roller conveyor is provided on the hydraulic lift. The lower roller conveyor can slide along the lower slide rail group to the second slide rail group, and the hydraulic lift can drive the lower roller conveyor to be raised to the same height as the upper roller conveyor.

[0008] Its overall operating logic is as follows: Mold removal stage: Place the new mold on the upper roller conveyor, keep the lower roller conveyor unloaded, and flip and fold the first and second slide rail groups towards the frame to reduce the overall footprint of the device. Move the device by braking the casters and lock it in position.

[0009] Alignment stage: After arriving at the press, the first slide rail group and the second slide rail group flip and unfold towards the press to dock, so that the first slide rail group is aligned with the upper slide rail group and the second slide rail group is aligned with the lower slide rail group to form a continuous rail surface. At this time, the height of the upper slide rail group corresponds to the height of the press mold exit.

[0010] Receiving the old mold stage: The hydraulic cylinder is activated to make the mounting plate slide along the lower slide rail group, which drives the lower roller conveyor to the second slide rail group; the scissor hydraulic lift drives the lower roller conveyor to rise to be flush with the upper slide rail group, and the old mold is pushed from the stamping machine to the lower roller conveyor; then the scissor hydraulic lift drives the lower roller conveyor to descend to the initial height, and the hydraulic cylinder drives the lower roller conveyor to slide back along the lower slide rail group to reset to below the frame.

[0011] New mold replacement stage: Manually slide the upper roller conveyor line along the upper slide rail group to the first slide rail group, and push the new mold to the stamping machine through the first slide rail group to complete the installation.

[0012] Removal phase: The upper roller conveyor slides back to its original position along the upper slide rail group, the first and second slide rail groups flip and fold towards the frame, the device is removed after the brake casters are unlocked, and the mold changing process is completed.

[0013] The device effectively reduces space occupation through the layered arrangement of the upper and lower slide rail groups and the flip-and-fold storage design of the first and second slide rail groups; at the same time, there is no need to move the device to realign with the punch opening during the mold changing process, making the mold changing process smooth and improving mold changing efficiency.

[0014] Furthermore, the width of the upper slide rail group is greater than that of the lower slide rail group. The upper slide rail group includes two upper slide rails that are spaced apart and parallel to each other along the width direction of the vehicle frame, and the lower slide rail group includes two lower slide rails that are spaced apart and parallel to each other along the width direction of the vehicle frame. Through this width difference design, when the scissor lift drives the lower roller conveyor to lift upward, the lower slide rail group can pass through and avoid obstacles through the gap space between the two upper slide rails.

[0015] Furthermore, the frame is hinged to an upper mounting frame and a lower mounting frame on the same side along its length. The upper mounting frame is provided with the first slide rail assembly, and the lower mounting frame is provided with the second slide rail assembly. Both the upper mounting frame and the lower mounting frame include two support arms that are spaced apart and parallel to each other along the width direction of the frame. The two support arms are respectively provided with a hinge mechanism between them and the frame for flipping the first slide rail assembly and the second slide rail assembly.

[0016] Furthermore, the hinge mechanism includes a fixed plate and a movable plate. The movable plate is located on the lower end face of the support arm near the frame. The frame includes a column, and a fixed plate is located on the side of the column near the support arm. The fixed plate has a first sliding groove and a second sliding groove spaced apart along its length. The movable plate has a first pin that slides in cooperation with the first sliding groove and a second pin that slides in cooperation with the second sliding groove. When the support arm rotates around the first pin, the second pin slides along the second sliding groove. The first sliding groove is a straight groove, and the second sliding groove includes a horizontal straight section and an arc section connected in sequence. The horizontal straight section and the straight groove are arranged horizontally. The arc section is centered on the end of the first sliding groove away from the column. The lengths of the straight groove and the horizontal straight section are such that there is no interference when the first slide rail group and the upper slide rail group, and the first slide rail group and the lower slide rail group are flipped. When the first slide rail group and the second slide rail group are flipped towards the frame to a retracted state that fits against the side of the frame, the first slide rail group and the upper slide rail group, and the second slide rail group and the lower slide rail group all form acute angles.

[0017] Docking status: The first pin is located at the end of the first slide groove (straight groove) near the column, and the second pin is located at the end of the horizontal straight section of the second slide groove near the column. At this time, the first slide rail group and the upper slide rail group, and the second slide rail group and the lower slide rail group are precisely aligned through translation, and the rail surfaces are flush to form a continuous channel.

[0018] During the flipping process: the first pin slides along the first slide groove (straight groove) to the end away from the column, and the second pin slides simultaneously to the end of the horizontal straight section away from the column. At this time, the first slide rail group separates from the upper slide rail group and the second slide rail group separates from the lower slide rail group along their length. The support arm rotates around the first pin as the center, and the second pin slides along the arc section of the second slide groove. Through the step-by-step action of "first translating and separating (the two pins slide along the straight groove to the far end) and then rotating along the arc section", the slide rail group completely avoids the upper and lower rail groups and the frame during the flipping process.

[0019] Storage state: The first pin is located at the end of the first slide groove (straight groove) away from the column, and the second pin is located at the end of the arc section of the second slide groove away from the column. At this time, the first slide rail group and the second slide rail group are in contact with the side of the frame, and the first slide rail group and the upper slide rail group, and the second slide rail group and the lower slide rail group are all at acute angles. They rely on gravity and the resistance of the slide groove to complete self-locking and prevent them from tipping over during movement.

[0020] Furthermore, the width of the upper roller conveyor is greater than that of the lower roller conveyor. Both the upper and lower roller conveyors include supports symmetrically arranged along the width direction of the frame. Multiple conveying rollers are spaced apart between the two supports along their length direction. Guide limiting plates for guiding and limiting the mold are symmetrically arranged on the supports.

[0021] Furthermore, the upper surface of the guide limiting plate is provided with at least two grooves spaced apart along its length. Two stop rods are symmetrically arranged on the guide limiting plates on both sides of the mold. Each stop rod has two ends that movably engage with the corresponding grooves on the guide limiting plates on both sides. Each end of the stop rod is provided with a stop ring, the diameter of which is larger than the groove. The grooves of the guide limiting plates, in conjunction with the symmetrically arranged stop rods, form a lateral rigid constraint by adjusting the spacing, precisely limiting the movement of the mold on the upper and lower roller conveyors; ensuring that the mold does not deviate during conveying and guaranteeing mold changing stability.

[0022] Furthermore, each of the upper slide rail group and the lower slide rail group is provided with a slide rail locking block at the end away from the first slide rail group and the second slide rail group, and each of the first slide rail group and the second slide rail group is provided with a slide rail locking block at the end away from the upper slide rail group and the lower slide rail group.

[0023] The beneficial effects of this utility model are as follows: 1. The layered layout of the upper and lower roller conveyors of this utility model, combined with the flip-and-store design of the first and second slide rail groups, forms an integrated structure of "one car, two workstations". By allocating vertical space, the horizontal parallel layout of the traditional integrated device is replaced, reducing the width of the device and making it more flexible to turn and shuttle in multi-press production lines. Compared with the existing one car, two workstation mode, it further saves workshop space. In the integrated process, the old mold receiving and the new mold installation are achieved in parallel without interference through the height difference. There is no need to move the equipment to re-align the press opening, reducing the number of positioning times, avoiding the interruption of the mold changing process, and improving the mold changing efficiency.

[0024] 2. The articulation mechanism of this utility model forms a collaborative mechanism through the cooperation of the sliding groove and pin column in the "horizontal straight section translation + arc section rotation": the translation first separates the slide rail group to avoid interference, the arc section guides the direction during rotation, the near end of the straight groove provides rigid limit to keep the rail surface flush during docking, and the double pin column resets during storage so that the acute angle of the slide rail group fits the frame, which saves space and prevents accidental overturning, thus improving the stability of equipment operation.

[0025] 3. The multi-groove design of the guide limiting plate of this utility model, combined with the stop rod with the stop ring, can quickly complete the limiting adjustment of the mold. The lateral displacement of the mold is small during the conveying process. The rigid constraint reduces the collision loss of the mold and reduces the equipment maintenance cost. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the front view structure of the molding stage of this utility model.

[0027] Figure 2 This is a schematic diagram of the rear view structure during the mold-taking stage of this utility model.

[0028] Figure 3 This is a schematic diagram of the alignment stage structure of this utility model.

[0029] Figure 4 This is a schematic diagram of the structure of the receiving old mold stage of this utility model.

[0030] Figure 5 This is a disassembly diagram of the upper roller conveyor and upper slide rail assembly of this utility model.

[0031] Figure 6 This is an enlarged schematic diagram of part A of this utility model.

[0032] Figure 7 This is a disassembly diagram of the lower roller conveyor and lower slide rail assembly of this utility model (receiving old mold stage).

[0033] Figure 8 This is a schematic diagram of the planar outline of the first sliding groove and the first pin, and the second sliding groove and the second pin of this utility model (in the docking state).

[0034] Reference numerals: 1. Frame; 2. Upper slide rail assembly; 3. Lower slide rail assembly; 4. First slide rail assembly; 5. Second slide rail assembly; 6. Upper roller conveyor; 7. Mounting plate; 8. Hydraulic cylinder; 9. Scissor-type hydraulic lift; 10. Lower roller conveyor; 11. Mold; 12. Support arm; 13. Hinge mechanism; 13-1. Fixed plate; 13-1.1. First slide groove; 13-1.2. Second slide groove; 13-1.2.1. Horizontal straight section; 13-1.2.2. Arc section; 13-2. Movable plate; 13-2.1. First pin; 13-2.2. Second pin; 14. Guide limit plate; 15. Stop bar. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0036] like Figures 1 to 8 As shown, an auxiliary device for changing molds for automotive parts includes a frame 1. At least four brake casters are provided at the bottom of the frame 1. An upper slide rail assembly 2 and a lower slide rail assembly 3 are spaced apart and parallel along the height direction of the frame 1. A first slide rail assembly 4 and a second slide rail assembly 5 are respectively hinged to the same side of the frame 1 along its length direction. The upper slide rail assembly 2 and the lower slide rail assembly 3 are the same length as the first slide rail assembly 4 and the second slide rail assembly 5. When the first slide rail assembly 4 and the second slide rail assembly 5 are flipped towards the stamping machine to a docking state, the first slide rail assembly 4 docks with the upper slide rail assembly 2 with its rail surface flush, and the second slide rail assembly 5 docks with the lower slide rail assembly 3 with its rail surface flush. The upper slide rail group 2 is equipped with an upper roller conveyor 6, which can slide along the upper slide rail group 2 to the first slide rail group 4; the lower slide rail group 3 is equipped with a mounting plate 7, and a hydraulic cylinder 8 is provided between the frame 1 and the mounting plate 7 to drive the mounting plate 7 to slide along the lower slide rail group 3. The hydraulic cylinder 8 is rotatably connected to the frame 1 and the mounting plate 7. The mounting plate 7 is equipped with a scissor-type hydraulic lift 9, and the scissor-type hydraulic lift 9 is equipped with a lower roller conveyor 10, which can slide along the lower slide rail group 3 to the second slide rail group 5. The scissor-type hydraulic lift 9 can drive the lower roller conveyor 10 to the same height as the upper roller conveyor 6.

[0037] Its overall operating logic is as follows: Mold removal stage: Place the new mold 11 on the upper roller conveyor 6, keep the lower roller conveyor 10 unloaded, and flip and fold the first slide rail group 4 and the second slide rail group 5 towards the frame 1 to reduce the overall footprint of the device. Move the device by braking the casters and lock it in position.

[0038] Alignment stage: After arriving at the press, the first slide rail group 4 and the second slide rail group 5 are flipped and unfolded towards the press to the docking state, so that the first slide rail group 4 is aligned with the upper slide rail group 2 and the second slide rail group 5 is aligned with the lower slide rail group 3 to form a continuous rail surface. At this time, the height of the upper slide rail group 2 corresponds to the height of the press mold exit.

[0039] Receiving the old mold stage: The hydraulic cylinder 8 is activated to make the mounting plate 7 slide along the lower slide rail group 3, which drives the lower roller conveyor 10 to move to the second slide rail group 5; the scissor hydraulic lift 9 drives the lower roller conveyor 10 to rise to be flush with the upper slide rail group 2, and the old mold 11 is pushed from the press to the lower roller conveyor 10; then the scissor hydraulic lift 9 drives the lower roller conveyor 10 to descend to the initial height, and the hydraulic cylinder 8 drives the lower roller conveyor 10 to slide back along the lower slide rail group 3 to reset to below the frame 1.

[0040] New mold replacement stage: Manually slide the upper roller conveyor 6 along the upper slide rail group 2 to the first slide rail group 4, and push the new mold 11 to the stamping machine via the first slide rail group 4 to complete the installation.

[0041] Removal phase: The upper roller conveyor 6 slides back to its original position along the upper slide rail group 2, the first slide rail group 4 and the second slide rail group 5 flip and fold towards the frame 1, the device is removed after the brake casters are unlocked, and the mold changing process is completed.

[0042] The device effectively reduces space occupation through the layered arrangement of the upper slide rail group 2 and the lower slide rail group 3, and the flip-and-store design of the first slide rail group 4 and the second slide rail group 5; at the same time, there is no need to move the device position to realign with the punch opening during the mold changing process, the mold changing process is smooth and the mold changing efficiency is improved.

[0043] Furthermore, the width of the upper slide rail group 2 is greater than that of the lower slide rail group 3. The upper slide rail group 2 includes two upper slide rails that are spaced apart and parallel to each other along the width direction of the frame 1, and the lower slide rail group 3 includes two lower slide rails that are spaced apart and parallel to each other along the width direction of the frame 1. Through this width difference design, when the scissor hydraulic lift 9 drives the lower roller conveyor 10 to lift upward, the lower slide rail group 3 can pass through and avoid obstacles through the gap space between the two upper slide rails.

[0044] Furthermore, the frame 1 is hinged to an upper mounting frame and a lower mounting frame on the same side along its length direction. The upper mounting frame is provided with a first slide rail group 4, and the lower mounting frame is provided with a second slide rail group 5. Both the upper mounting frame and the lower mounting frame include two support arms 12 that are spaced apart and parallel to each other along the width direction of the frame 1. The two support arms 12 are respectively provided with a hinge mechanism 13 between them and the frame 1 for flipping the first slide rail group 4 and the second slide rail group 5.

[0045] Furthermore, the hinge mechanism 13 includes a fixed plate 13-1 and a movable plate 13-2. The movable plate 13-2 is provided on the lower end face of the support arm 12 near the frame 1. The frame 1 includes a column. The fixed plate 13-1 is provided on the side of the column near the support arm 12. The fixed plate 13-1 is provided with a first sliding groove 13-1.1 and a second sliding groove 13-1.2 spaced apart along its length. The movable plate 13-2 is provided with a first pin 13-2.1 that slides with the first sliding groove 13-1.1 and a second pin 13-2.2 that slides with the second sliding groove 13-1.2. When the support arm 12 rotates around the first pin 13-2.1, the second pin 13-2.2 slides along the second sliding groove 13-1.2. The first slide rail 13-1.1 is a straight slide rail, and the second slide rail 13-1.2 includes a horizontal straight section 13-1.2.1 and an arc section 13-1.2.2 connected in sequence. The horizontal straight section 13-1.2.1 and the straight slide rail are arranged horizontally. The arc section 13-1.2.2 is centered on the end of the first slide rail 13-1.1 away from the column. The lengths of the straight slide rail and the horizontal straight section 13-1.2.1 are such that there is no interference when the first slide rail group 4 and the upper slide rail group 2 and the first slide rail group 4 and the lower slide rail group 3 are flipped. When the first slide rail group 4 and the second slide rail group 5 are flipped towards the frame 1 to the storage state that fits the side of the frame 1, the first slide rail group 4 and the upper slide rail group 2, and the second slide rail group 5 and the lower slide rail group 3 are all at acute angles.

[0046] Docking status: The first pin 13-2.1 is located at the end of the first slide groove 13-1.1 (straight groove) near the column, and the second pin 13-2.2 is located at the end of the horizontal straight section 13-1.2.1 of the second slide groove 13-1.2 near the column. At this time, the first slide rail group 4 and the upper slide rail group 2, and the second slide rail group 5 and the lower slide rail group 3 are precisely aligned through translation, and the rail surfaces are flush to form a continuous channel.

[0047] During the flipping process: the first pin 13-2.1 slides along the first slide groove 13-1.1 (straight groove) to the end away from the column, and the second pin 13-2.2 slides synchronously to the end away from the column on the horizontal straight section 13-1.2.1. At this time, the first slide rail group 4 separates from the upper slide rail group 2 and the second slide rail group 5 separates from the lower slide rail group 3 along their length. The support arm 12 rotates around the first pin 13-2.1 as the center, and the second pin 13-2.2 slides along the arc section 13-1.2.2 of the second slide groove 13-1.2. Through the step-by-step action of "first translating and separating (the two pins slide along the straight groove to the far end) and then rotating the arc section", the slide rail group completely avoids the upper and lower rail groups and the frame 1 during the flipping process.

[0048] Storage state: The first pin 13-2.1 is located at the end of the first slide groove 13-1.1 (straight groove) away from the column, and the second pin 13-2.2 is located at the end of the arc segment 13-1.2.2 of the second slide groove 13-1.2 away from the column. At this time, the first slide rail group 4 and the second slide rail group 5 are in contact with the side of the frame 1, and the first slide rail group 4 and the upper slide rail group 2, and the second slide rail group 5 and the lower slide rail group 3 are all at acute angles. They rely on gravity and the resistance of the slide groove to complete self-locking and prevent them from tipping over during movement.

[0049] Furthermore, the width of the upper roller conveyor 6 is greater than that of the lower roller conveyor 10. Both the upper roller conveyor 6 and the lower roller conveyor 10 include brackets symmetrically arranged along the width direction of the frame 1. Multiple conveying rollers are spaced apart between the two brackets along their length direction. Guide limiting plates 14 are symmetrically arranged on the brackets to guide and limit the mold 11.

[0050] Furthermore, the upper surface of the guide limiting plate 14 is provided with multiple grooves spaced along its length. Two stop rods 15 are symmetrically arranged on the guide limiting plates 14 on both sides of the mold 11. The two ends of each stop rod 15 are respectively movable and engaged into the corresponding grooves of the guide limiting plates 14 on both sides. Both ends of the stop rod 15 are provided with stop rings, the diameter of which is larger than the groove. The grooves of the guide limiting plate 14, in conjunction with the symmetrically arranged stop rods 15, form a lateral rigid constraint by adjusting the spacing, precisely limiting the movement of the mold 11 on the upper and lower roller conveyors; ensuring that the mold 11 does not deviate during conveying and guaranteeing mold changing stability.

[0051] Furthermore, the upper slide rail group 2 and the lower slide rail group 3 are each provided with a slide rail locking block at the end away from the first slide rail group 4 and the second slide rail group 5, and the first slide rail group 4 and the second slide rail group 5 are each provided with a slide rail locking block at the end away from the upper slide rail group 2 and the lower slide rail group 3, to prevent the upper roller conveyor line 6 and the lower roller conveyor line 10 from disengaging.

[0052] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mold changing auxiliary device for automotive parts, comprising a vehicle frame, characterized in that, The frame is provided with an upper slide rail group and a lower slide rail group spaced apart and parallel along its height direction; the frame is hinged with a first slide rail group and a second slide rail group on the same side along its length direction. When the first slide rail group and the second slide rail group are flipped to the docking state in the direction of the stamping machine, the first slide rail group docks with the upper slide rail group and the rail surface is flush with it, and the second slide rail group docks with the lower slide rail group and the rail surface is flush with it. The upper slide rail assembly is provided with an upper roller conveyor line, which can slide along the upper slide rail assembly to the first slide rail assembly. A mounting plate is slidably mounted on the lower slide rail assembly. A hydraulic lift is mounted on the mounting plate. A lower roller conveyor is mounted on the hydraulic lift. The lower roller conveyor can slide along the lower slide rail assembly to the second slide rail assembly. The hydraulic lift can drive the lower roller conveyor to rise to the same height as the upper roller conveyor.

2. The automotive parts mold changing auxiliary device according to claim 1, characterized in that, A hydraulic cylinder is provided between the frame and the mounting plate to drive the mounting plate to slide along the lower rail assembly.

3. The automotive parts mold changing auxiliary device according to claim 1, characterized in that, The width of the upper slide rail group is greater than that of the lower slide rail group. The upper slide rail group includes two upper slide rails that are spaced apart and parallel to each other along the width direction of the vehicle frame. The lower slide rail group includes two lower slide rails that are spaced apart and parallel to each other along the width direction of the vehicle frame.

4. The automotive parts mold changing auxiliary device according to claim 1, characterized in that, The frame is hinged to an upper mounting frame and a lower mounting frame on the same side along its length. The upper mounting frame is provided with the first slide rail group, and the lower mounting frame is provided with the second slide rail group. Both the upper mounting frame and the lower mounting frame include two support arms that are spaced apart and parallel to each other along the width direction of the frame. The two support arms are respectively provided with a hinge mechanism between them and the frame for flipping the first slide rail group and the second slide rail group.

5. The automotive parts mold changing auxiliary device according to claim 4, characterized in that, The hinge mechanism includes a fixed plate and a movable plate. The movable plate is provided on the lower end face of the support arm near the frame. The frame includes a column. A fixed plate is provided on the side of the column near the support arm. A first slide groove and a second slide groove are provided at intervals along the length of the fixed plate. A first pin that slides in cooperation with the first slide groove and a second pin that slides in cooperation with the second slide groove are respectively provided on the movable plate. When the support arm rotates around the first pin, the second pin slides along the second slide groove.

6. The automotive parts mold changing auxiliary device according to claim 5, characterized in that, The first slide groove is a straight groove, and the second slide groove includes a horizontal straight section and an arc section connected in sequence. The horizontal straight section and the straight groove are arranged horizontally. The arc section is centered on the end of the first slide groove away from the column. The lengths of the straight groove and the horizontal straight section are such that there is no interference when the first slide rail group and the upper slide rail group, and the first slide rail group and the lower slide rail group are flipped. When the first slide rail group and the second slide rail group are flipped towards the frame to a storage state that fits against the side of the frame, the first slide rail group and the upper slide rail group, and the second slide rail group and the lower slide rail group all form acute angles.

7. The automotive parts mold changing auxiliary device according to claim 1, characterized in that, The width of the upper roller conveyor is greater than that of the lower roller conveyor. Both the upper and lower roller conveyors include brackets symmetrically arranged along the width direction of the frame. Multiple conveying rollers are spaced apart between the two brackets along their length direction. Guide limiting plates for guiding and limiting the mold are symmetrically arranged on the brackets.

8. The automotive parts mold changing auxiliary device according to claim 7, characterized in that, The upper surface of the guide limiting plate is provided with at least two grooves spaced apart along its length. Two stop rods are symmetrically provided on the guide limiting plates on both sides of the mold. The two ends of each stop rod are respectively movably inserted into the corresponding grooves of the guide limiting plates on both sides.

9. The automotive parts mold changing auxiliary device according to claim 8, characterized in that, Both ends of the stop lever are provided with stop rings, and the diameter of the stop rings is larger than that of the groove.

10. The automotive parts mold changing auxiliary device according to claim 1, characterized in that, The hydraulic lift is a scissor lift.

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