Automatic wrapping device for automobile interior with sewing thread

Abstract

The invention provides an automatic covering device for automobile interior decoration with sewing thread, the covering device comprises: a lower mold and an upper mold, the upper mold is provided with a lifting mechanism, and the two sides of the lower mold are provided with side pushing mechanisms for clamping the workpiece on the lower mold, the lower mold comprises: a lower mold body, a side lower mold, a lower mold mounting plate, a sewing thread lifting mold, a main spring assembly and a secondary spring assembly; two symmetrical sewing thread lifting mold mounting grooves are provided on the edge positions close to the two sides of the lower mold body, and the sewing thread lifting mold is installed in the sewing thread lifting mold mounting grooves. The advantages of the invention are: the lower mold is improved to add a sewing thread lifting mold with a positioning and adsorption function and a side pushing mechanism to realize automatic covering of interior decoration products, the front and rear edges of the skin are adsorbed by vacuum suction cups to ensure the stability of the shape of the sewing thread during the covering process, and to ensure the position and flatness requirements of the sewing thread after covering, so that the product meets the quality standards.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior covering, and in particular to an automobile interior automatic covering device with a sewing thread. Background Art

[0002] In the coating and bonding process of various leather materials for automobile interior parts, manual coating and bonding and existing automatic hemming equipment are most commonly used. Since the corresponding automobile interior parts for hemming often have complex structures and irregular surfaces, manual coating is inefficient and the coating effect is not good. The sewing lines of existing automobile interior products are usually in the shape of a single exposed line after double-skin sewing, and the hemming mechanisms on the market currently usually have quality defects such as difficult positioning of the shape of a single exposed line after double-skin sewing and unstable position accuracy. Patent No. 201320744155.2 discloses a utility model patent named "a line setting tool for automobile interior parts products". This patent solution can better guarantee the position accuracy requirements of the sewing line, but it requires manual pre-coating of the product, and the coating is manually achieved after the sewing line is pressed by a line setting knife. Its disadvantage is that manual participation is still unavoidable, and there are high requirements for personnel's operating proficiency and the operation is complicated. Patent No. 201320772843.4 also discloses a utility model patent named "Positioning device for sewing thread of soft-coated surface of automobile door panel interior", which provides a device for positioning sewing thread with infrared laser, which can accurately position the surface to be sewn, but cannot solve the problem of stringing caused by stress (accidental contact) during the coating process of the surface. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide an automatic automobile interior covering device with a sewing thread, which is used for automatically covering automobile interior decoration parts to overcome the above-mentioned deficiencies of the prior art.

[0004] The automatic covering device for automobile interior with sewing thread provided by the present invention comprises: a lower mold, an upper mold arranged above the lower mold, characterized in that a lifting mechanism for driving the upper mold to lift is arranged on the upper mold, and side pushing mechanisms for clamping the workpiece on the lower mold are arranged on both sides of the lower mold, wherein the lower mold comprises: a lower mold body, a side lower mold, a lower mold mounting plate, a jacking mold in the sewing thread, a main spring assembly and a secondary spring assembly, the lower mold body is mounted on the lower mold mounting plate, two side lower molds are fixedly connected to the lower mold mounting plate and are located on both sides of the lower mold body, and at least two A main spring assembly is arranged below the lower mold mounting plate and passes through the lower mold mounting plate and is fixedly connected to the lower mold body. The main spring assembly drives the lower mold body to reciprocate on the lower mold mounting plate. Two symmetrical sewing thread lifting mold mounting grooves are arranged on the edge positions near both sides of the lower mold body. The sewing thread lifting mold is installed in the sewing thread lifting mold mounting groove. At least two auxiliary spring assemblies are arranged in the sewing thread lifting mold mounting groove and are fixedly connected to the sewing thread lifting mold. The auxiliary spring assembly drives the sewing thread lifting mold to reciprocate in the sewing thread lifting mold mounting groove.

[0005] Preferably, the main spring assembly includes: a main spring bracket, a main spring, a main spring guide column and a main stroke limit block, one end of the main spring guide column passes through the through hole on the lower mold mounting plate and is fixedly connected to the guide column mounting groove of the lower mold body, the other end of the main spring guide column passes through the main spring bracket and is bolted or fixedly connected with the main stroke limit block, the main spring is sleeved on the main spring guide column, one end of the main spring is supported on the top wall in the guide column mounting groove or on the guide column block at the end position of the main spring guide column, and the other end of the main spring is supported in the main spring mounting groove on the main spring bracket.

[0006] Preferably, the auxiliary spring assembly includes: an auxiliary spring bracket, an auxiliary spring, an auxiliary spring guide column and an auxiliary stroke limit block, one end of the auxiliary spring guide column is fixedly connected to the bottom of the jacking mold in the sewing line, the other end of the auxiliary spring guide column passes through the auxiliary spring bracket and the lower mold mounting plate and is bolted or fixedly connected with the auxiliary stroke limit block, or the other end of the auxiliary spring guide column passes through the auxiliary spring bracket and is bolted or fixedly connected with the auxiliary stroke limit block, the auxiliary spring bracket is installed in the mounting groove of the jacking mold in the sewing line, one end of the auxiliary spring is supported on the bottom of the jacking mold in the sewing line, and the other end of the auxiliary spring is supported in the auxiliary spring mounting groove on the auxiliary spring bracket.

[0007] Preferably, a single visible thread groove is provided on the lifting mold in the sewing thread after the double skin is sewn, and the connecting end of the first skin is placed on the connecting end of the second skin after the double surface is folded. The first skin and the second skin are sewn with a single visible thread in the vertical direction, and a hidden thread is sewn at the bending position of the first skin and the second skin.

[0008] Preferably, the lifting mechanism includes: a lifting cylinder, a lifting upper plate, an upper mold connecting plate, a guide column and a safety lock block mechanism. The lifting cylinder is installed on the lifting upper plate. The free end of the piston rod of the lifting cylinder passes through the avoidance groove or avoidance hole of the lifting upper plate and is fixedly connected to the upper end surface of the upper mold connecting plate. One end of two groups of evenly distributed guide columns is fixedly connected to the lifting upper plate, and the other ends of the two groups of evenly distributed guide columns are arranged on the core shaft sleeve on the upper mold connecting plate. The upper mold is installed on the lower end surface of the upper mold connecting plate. The safety lock block mechanism The structure includes: a safety lock cylinder and a safety lock cylinder seat. The safety lock cylinder is installed on the lower end surface of the lifting upper plate through the safety lock cylinder seat. At least one locking block is fixedly connected to the upper end surface of the upper mold connecting plate. When the piston rod of the lifting cylinder retracts to the stroke position, the free end of the locking block is held on the lower end surface of the lifting upper plate. A locking groove is provided on the side wall of the upper mold or on the locking block. The free end of the piston rod of the safety lock cylinder is inserted into the locking groove or a safety pin is provided on the piston rod of the safety lock cylinder, and the safety pin is inserted into the lock groove.

[0009] Preferably, an inspection bracket is installed on the upper mold, and an inspection switch is provided on the inspection bracket. The inspection switch is used to detect whether there is a workpiece on the lower mold and the position of the workpiece on the lower mold.

[0010] Preferably, the side push mechanism comprises: a side upper profiling mold, a side push cylinder, a side push base, a cylinder lower connecting plate, a limit connecting block, a blocking block, a guide rail and a slider. The side upper profiling mold is slidably connected to at least one group of guide rails through the slider. The free end of the piston rod of the side push cylinder is fixedly connected to the side upper profiling mold. The side push cylinder pushes the side upper profiling mold to slide on the guide rail. The tail of the side push cylinder is installed on the side push base through the cylinder lower connecting plate. The blocking block is installed on the side push base below the side push cylinder. The limit connecting block is installed on the side of the side upper profiling mold close to the side push cylinder. After the piston rod of the side push cylinder retracts to the stroke position, the limit connecting block is supported on the blocking block. The guide rail is horizontally arranged on the side push base along the pushing direction of the side push cylinder. Two blocking columns are arranged on the side push base on both sides of each group of guide rails. After the side upper profiling mold retracts to the stroke position, the blocking column is supported on the side upper profiling mold.

[0011] Preferably, a positioning suction cup is installed in the installation groove of the lifting mold in the sewing thread and / or on the lifting mold in the sewing thread, and the positioning suction cup is a vacuum suction cup, which is used to absorb the skin on the lifting mold in the sewing thread.

[0012] The advantages and positive effects of the present invention are:

[0013] 1. The present invention can realize automatic covering of interior products by improving the lower mold and adding a sewing thread lifting mold with positioning and adsorption functions and a side pushing mechanism. The break at the epidermis sewing line can be docked with the sewing thread profiling mold. The adsorption function of the sewing thread profiling mold can realize the precise positioning of the epidermis sewing line. The front and rear edges of the epidermis are adsorbed by vacuum suction cups to ensure the stability of the shape of the sewing thread during the covering process. The sewing thread profiling mold is located at the top of the lower mold. This design can ensure that the epidermis in the sewing line area is bonded to the skeleton first, and ensure the position and flatness requirements of the sewing thread after covering, so that the product meets the quality standards and reduces the fatigue of personnel operation.

[0014] 2. The two side-thrust mechanisms of the present invention can position and clamp the interior products. The cooperation between the limit connecting block and the blocking block arranged on the side-thrust mechanism, as well as the cooperation between the side-upper profiling mold and the blocking column, enable the position of the side-upper profiling mold to be accurately limited to a specific position after the side-thrust cylinder retracts.

[0015] 3. The present invention drives the lower mold to rise and fall through the main spring assembly. After the upper mold rises, the main spring assembly drives the lower mold to rise to the original position, and then adjusts the position of the main stroke limit block on the main spring guide column to achieve the position where the spring drives the lower mold to rise. Similarly, the auxiliary spring assembly drives the lifting mold in the sewing line to rise and fall to achieve the position where the spring drives the lifting mold in the sewing line to rise.

[0016] 4. The present invention drives the upper mold to be lifted and lowered by a lifting mechanism, and the safety locking block mechanism of the lifting mechanism locks the upper mold on the lifting upper plate to solve the problem that the piston rod of the lifting cylinder needs to bear the gravity of the upper mold at all times, so as to improve the service life of the lifting cylinder. On the other hand, it prevents the upper mold connecting plate from falling from the piston rod. In addition, by setting a locking block on the upper mold connecting plate, the lifting cylinder drives the upper mold connecting plate to retract to the stroke position, and the locking block is held on the lifting upper plate, which can further protect the lifting cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0018] Figure 1 Schematic diagram of the overall structure according to an embodiment of the present invention.

[0019] Figure 2 It is a front view of the overall structure according to an embodiment of the present invention.

[0020] Figure 3 It is a stereoscopic diagram of a side thrust mechanism according to an embodiment of the present invention.

[0021] Figure 4 2 is a three-dimensional diagram of a lifting mechanism according to an embodiment of the present invention.

[0022] Figure 5 4 is a three-dimensional diagram of a lower mold according to an embodiment of the present invention.

[0023] Figure 6 This is one of the side sectional views of the lower mold according to an embodiment of the present invention.

[0024] Figure 7 This is the second side sectional view of the lower mold according to an embodiment of the present invention.

[0025] Figure 8 It is a front view of a lifting mechanism according to an embodiment of the present invention.

[0026] Fig. 9 This is a front view of a double-skin sewing structure with a single exposed stitch after stitching according to an embodiment of the present invention.

[0027] The accompanying drawings include: lower mold 1, lower mold body 1-1, side lower mold 1-2, lower mold mounting plate 1-3, lifting mold in sewing thread 1-4, main spring assembly 1-5, main spring bracket 1-5-1, main spring 1-5-2, main spring guide column 1-5-3, main stroke limit block 1-5-4, auxiliary spring assembly 1-6, auxiliary spring bracket 1-6-1, auxiliary spring 1-6-2, auxiliary spring guide column 1-6-3, auxiliary stroke limit block 1-6-4, lifting mold mounting groove in sewing thread 1-7, upper mold 2, inspection bracket 2-1, inspection opening Gate 2-2, lifting mechanism 3, lifting cylinder 3-1, lifting upper plate 3-2, upper mold connecting plate 3-3, guide column 3-4, safety lock block mechanism 3-5, safety lock cylinder 3-5-1, safety lock cylinder seat 3-5-2, locking block 3-5-3, core shaft sleeve 3-6, side push mechanism 4, side upper profiling mold 4-1, side push cylinder 4-2, side push base 4-3, cylinder lower connecting plate 4-4, limit connecting block 4-5, blocking block 4-6, guide rail 4-7, slider 4-8, blocking column 4-9, first epidermis 5, second epidermis 6, single visible line 7, hidden line 8. DETAILED DESCRIPTION

[0028] In the following description, for the purpose of illustration, in order to provide a comprehensive understanding of one or more embodiments, many specific details are set forth. However, it is apparent that these embodiments may also be implemented without these specific details. In other examples, for ease of describing one or more embodiments, known structures and devices are shown in the form of block diagrams.

[0029] Figure 1-9 A schematic diagram of the overall structure according to an embodiment of the present invention is shown.

[0030] The present invention comprises: a lower mold 1, an upper mold 2 arranged above the lower mold 1, a lifting mechanism 3 is arranged on the lower mold 1 to drive the upper mold 2 to rise and fall, and side pushing mechanisms 4 are arranged on both sides of the lower mold 1 for clamping the workpiece on the lower mold 1.

[0031] See also Figure 5-7 The lower mold 1 of the present invention comprises: a lower mold body 1-1, a side lower mold 1-2, a lower mold mounting plate 1-3, a sewing thread lifting mold 1-4, a main spring assembly 1-5 and an auxiliary spring assembly 1-6. The lower mold body 1-1 is installed in the middle position of the lower mold mounting plate 1-3, and two side lower molds 1-2 are fixedly connected to the lower mold mounting plate 1-3. The inner walls of the side lower molds 1-2 are attached to the two sides of the lower mold body 1-1. Each group of main spring assemblies 1-5 is two, and a total of two groups of main spring assemblies 1-5 are arranged below the lower mold mounting plate 1-3 and pass through the lower mold mounting plate 1-3 to be fixedly connected to the lower mold body 1. The main spring assembly 1-5 drives the lower mold body 1-1 in The lower mold mounting plate 1-3 moves up and down, and two symmetrical sewing thread lifting mold mounting grooves 1-7 are arranged on the edge positions near the two sides of the lower mold body 1-1. The sewing thread lifting mold 1-4 is installed in the sewing thread lifting mold mounting groove 1-7. Two auxiliary spring assemblies 1-6 are arranged in the sewing thread lifting mold mounting groove 1-7 and are fixedly connected to the sewing thread lifting mold 1-4. The auxiliary spring assembly 1-6 drives the sewing thread lifting mold 1-4 to move up and down in the sewing thread lifting mold mounting groove 1-7. The shape of the sewing thread lifting mold 1-4 is L-shaped, and the shape of the connection position between the lower mold body 1-1 and the sewing thread lifting mold 1-4 is an inverted L-shape.

[0032] See also Figure 6-7 The main spring assembly 1-5 of the present invention includes: a main spring bracket 1-5-1, a main spring 1-5-2, a main spring guide column 1-5-3 and a main stroke limit block 1-5-4. One end of the main spring guide column 1-5-3 passes through the through hole on the lower mold mounting plate 1-3 and is fixedly connected to the guide column mounting groove of the lower mold body 1-1. The other end of the main spring guide column 1-5-3 passes through the main spring bracket 1-5-1 and is bolted to the main stroke limit block 1-5-4. The main spring 1-5-2 is sleeved on the main spring guide column 1-5-3. One end of the main spring 1-5-2 is supported on the guide column block at the end position of the main spring guide column 1-5-3, and the other end of the main spring 1-5-2 is supported in the main spring mounting groove on the main spring bracket 1-5-1.

[0033] The working principle of the lower mold body 1-1 and the main spring assembly 1-5: the lifting mechanism 3 drives the upper mold 2 to press down the lower mold body 1-1. After the upper mold 2 descends to contact the side lower mold, the main spring 1-5-2 of the main spring assembly 1-5 accumulates force and contracts. After the lifting mechanism 3 drives the upper mold 2 to rise, the main spring 1-5-2 bounces up and drives the lower mold body 1-1 back to its initial position.

[0034] See also Figure 6-7 The auxiliary spring assembly 1-6 of the present invention includes: an auxiliary spring bracket 1-6-1, an auxiliary spring 1-6-2, an auxiliary spring guide column 1-6-3 and an auxiliary stroke limit block 1-6-4, one end of the auxiliary spring guide column 1-6-3 is fixedly connected to the bottom of the jacking mold 1-4 in the sewing line, the other end of the auxiliary spring guide column 1-6-3 passes through the auxiliary spring bracket 1-6-1, the lower mold mounting plate 1-3 and is bolted to the auxiliary stroke limit block, the auxiliary spring bracket 1-6-1 is installed in the jacking mold mounting groove 1-7 in the sewing line, one end of the auxiliary spring 1-6-2 is supported on the bottom of the jacking mold 1-4 in the sewing line, and the other end of the auxiliary spring 1-6-2 is supported in the auxiliary spring mounting groove on the auxiliary spring bracket 1-6-1.

[0035] The working principle of the lifting mold 1-4 and the auxiliary spring assembly 1-6 in the sewing thread: the lifting mechanism 3 drives the upper mold 2 to press down the lifting mold 1-4 in the sewing thread. After the upper mold 2 descends to contact the side lower mold, the auxiliary spring 1-6-2 of the auxiliary spring assembly 1-6 accumulates force and contracts. After the lifting mechanism 3 drives the upper mold 2 to rise, the auxiliary spring 1-6-2 bounces up and drives the lifting mold 1-4 in the sewing thread to return to its initial position.

[0036] See also Fig. 9 In the sewing thread of the present invention, a groove for a single visible thread is provided on the lifting mold 1-4 after the double skin is sewn. The connecting end of the first skin 5 is placed on the connecting end of the second skin 6 after the double surface is folded. The first skin 5 and the second skin 6 are sewn with a single visible thread 7 in the vertical direction, and a hidden thread 8 is sewn at the bending position of the first skin 5 and the second skin 6.

[0037] See also Figure 4The lifting mechanism 3 of the present invention comprises: a lifting cylinder 3-1, a lifting upper plate 3-2, an upper mold connecting plate 3-3, a guide column 3-4 and a safety lock block mechanism 3-5. The lifting cylinder 3-1 is installed on the middle position of the lifting upper plate 3-2 through a cylinder mounting seat. The free end of the piston rod of the lifting cylinder 3-1 passes through the avoidance groove of the lifting upper plate 3-2 and is fixedly connected to the coupling on the upper end surface of the upper mold connecting plate 3-3. One end of the four guide columns 3-4 is fixedly connected to the four corners of the lifting upper plate 3-2, and the other ends of the four guide columns 3-4 are inserted into the upper mold connecting plate. The upper mold is mounted on the mandrel sleeve 3-6 on the upper mold, and the upper mold is mounted on the lower end surface of the upper mold connecting plate 3-3; the safety lock block mechanism 3-5 includes: a safety lock cylinder 3-5-1 and a safety lock cylinder seat 3-5-2, the safety lock cylinder 3-5-1 is mounted on the lower end surface of the lifting upper plate 3-2 through the safety lock cylinder seat 3-5-2, and two locking blocks 3-5-3 are vertically fixed on the upper end surface of the upper mold connecting plate 3-3. When the piston rod of the lifting cylinder 3-1 retracts to the stroke position, the free end of the locking block 3-5-3 is supported on the lower end surface of the lifting upper plate 3-2. A locking groove is set on the locking block 3-5-3, and the free end of the piston rod of the safety lock cylinder 3-5-1 is inserted into the locking groove.

[0038] See also Figure 8 In the present invention, an inspection support 2-1 is installed on the upper mold 2, and an inspection switch 2-2 is provided on the inspection support 2-1. The inspection switch 2-2 is used to detect whether there is a workpiece on the lower mold 1 and the position of the workpiece on the lower mold 1.

[0039] See also Figure 3The side push mechanism 4 of the present invention comprises: a side upper profiling mold 4-1, a side push cylinder 4-2, a side push base 4-3, a cylinder lower connecting plate 4-4, a limit connecting block 4-5, a blocking block 4-6, a guide rail 4-7, a slider 4-8 and a blocking column 4-9. The side upper profiling mold 4-1 is slidably connected to two guide rails 4-7 through two groups of four sliders 4-8 installed at the bottom of the side upper profiling mold 4-1. The free end of the piston rod of the side push cylinder 4-2 is fixedly connected to the rear connecting piece on the back of the side upper profiling mold 4-1. The side push cylinder 4-2 pushes the side upper profiling mold 4-1 to slide on the guide rail 4-7. The tail of the side push cylinder 4-2 is fixedly connected to one end of the cylinder lower connecting plate 4-4. The other end is mounted on the side-thrust base 4-3 by bolts, one end of the blocking block 4-6 is supported on the side-thrust cylinder 4-2, and the other end of the blocking block 4-6 is mounted on the side-thrust base 4-3. The limiting connecting block 4-5 is installed at the bottom position of the side upper profiling mold 4-1 on one side close to the side-thrust cylinder 4-2. After the piston rod of the side-thrust cylinder 4-2 retracts to the stroke position, the limiting connecting block 4-5 is supported on the blocking block 4-6. The guide rail 4-7 is horizontally arranged on the side-thrust base 4-3 along the pushing direction of the side-thrust cylinder 4-2. Two blocking columns 4-9 are arranged on the side-thrust base 4-3. After the side upper profiling mold 4-1 retracts to the stroke position, the blocking columns 4-9 are supported on the two limiting grooves on the back of the side upper profiling mold 4-1.

[0040] See also Figure 5 The lifting mold installation groove 1-7 of the sewing thread of the present invention and the lifting mold 1-4 of the sewing thread are both equipped with positioning suction cups, which are vacuum suction cups used to absorb the skin on the lifting mold of the sewing thread.

[0041] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An automatic covering device for automobile interior with sewing thread, comprising: A lower mold, an upper mold arranged above the lower mold, characterized in that a lifting mechanism for driving the upper mold to rise and fall is arranged on the upper mold, and side pushing mechanisms for clamping the workpiece on the lower mold are arranged on both sides of the lower mold, wherein the lower mold comprises: a lower mold body, a side lower mold, a lower mold mounting plate, a lifting mold in the sewing thread, a main spring assembly and a secondary spring assembly, the lower mold body is mounted on the lower mold mounting plate, two side lower molds are fixedly connected to the lower mold mounting plate and are located on both sides of the lower mold body, and at least two groups of the main spring assemblies are arranged on the lower mold mounting plate The main spring assembly drives the lower mold body to reciprocate on the lower mold mounting plate, and two symmetrical sewing thread lifting mold mounting grooves are arranged on the edge positions near the two sides of the lower mold body, and the sewing thread lifting mold is installed in the sewing thread lifting mold mounting grooves. At least two of the auxiliary spring assemblies are arranged in the sewing thread lifting mold mounting grooves and are fixedly connected to the sewing thread lifting mold, and the auxiliary spring assembly drives the sewing thread lifting mold to reciprocate in the sewing thread lifting mold mounting grooves.

2. The automatic covering device for automobile interior decoration with sewing thread according to claim 1, characterized in that: The main spring assembly includes: a main spring bracket, a main spring, a main spring guide column and a main stroke limit block, one end of the main spring guide column is fixedly connected to the guide column mounting groove of the lower mold body through the through hole on the lower mold mounting plate, the other end of the main spring guide column is bolted or pin-fixedly connected to the main stroke limit block through the main spring bracket, the main spring is sleeved on the main spring guide column, one end of the main spring is supported on the top wall in the guide column mounting groove or on the guide column block at the end position of the main spring guide column, and the other end of the main spring is supported in the main spring mounting groove on the main spring bracket.

3. The automatic covering device for automobile interior decoration with sewing thread according to claim 1, characterized in that: The auxiliary spring assembly includes: an auxiliary spring bracket, an auxiliary spring, an auxiliary spring guide column and an auxiliary stroke limit block, one end of the auxiliary spring guide column is fixedly connected to the bottom of the jacking mold in the sewing thread, the other end of the auxiliary spring guide column passes through the auxiliary spring bracket and the lower mold mounting plate and is bolted or fixedly connected with the auxiliary stroke limit block, or the other end of the auxiliary spring guide column passes through the auxiliary spring bracket and is bolted or fixedly connected with the auxiliary stroke limit block, the auxiliary spring bracket is installed in the jacking mold mounting groove in the sewing thread, one end of the auxiliary spring supports the bottom of the jacking mold in the sewing thread, and the other end of the auxiliary spring is supported in the auxiliary spring mounting groove on the auxiliary spring bracket.

4. The automatic covering device for automobile interior decoration with sewing thread according to claim 1, characterized in that: The lifting mold in the sewing thread is provided with a groove for a single visible thread after sewing the double skins. The connecting end of the first skin is placed on the connecting end of the second skin after folding the double surface. The first skin and the second skin are sewn with the single visible thread in the vertical direction, and a hidden thread is sewn at the bending position of the first skin and the second skin.

5. The automatic covering device for automobile interior decoration with sewing thread according to any one of claims 1 to 4, characterized in that: The lifting mechanism comprises: a lifting cylinder, a lifting upper plate, an upper mold connecting plate, a guide column and a safety lock block mechanism, wherein the lifting cylinder is mounted on the lifting upper plate, the free end of the piston rod of the lifting cylinder passes through the avoidance groove or avoidance hole of the lifting upper plate and is fixedly connected to the upper end surface of the upper mold connecting plate, one end of two groups of evenly arranged guide columns are fixedly connected to the lifting upper plate, the other ends of the two groups of evenly arranged guide columns are arranged on the core shaft sleeve on the upper mold connecting plate, the upper mold is mounted on the lower end surface of the upper mold connecting plate, and the safety lock block mechanism comprises : Safety lock cylinder, safety lock cylinder seat, the safety lock cylinder is installed on the lower end surface of the lifting upper plate through the safety lock cylinder seat, and at least one locking block is fixedly connected to the upper end surface of the upper mold connecting plate. When the piston rod of the lifting cylinder retracts to the stroke position, the free end of the locking block is supported on the lower end surface of the lifting upper plate, and a lock groove is provided on the side wall of the upper mold or on the locking block, and the free end of the piston rod of the safety lock cylinder is inserted into the lock groove or a safety pin is provided on the piston rod of the safety lock cylinder, and the safety pin is inserted into the lock groove.

6. An automatic covering device for automobile interior decoration with sewing thread according to any one of claims 1 to 4, characterized in that: An inspection support is installed on the upper mold, and an inspection switch is arranged on the inspection support. The inspection switch is used to detect whether there is a workpiece on the lower mold and the position of the workpiece on the lower mold.

7. The automatic covering device for automobile interior decoration with sewing thread according to claim 1, characterized in that: The side thrust mechanism comprises: a side upper profiling mold, a side thrust cylinder, a side thrust base, a cylinder lower connecting plate, a limit connecting block, a blocking block, a guide rail and a slider, wherein the side upper profiling mold is slidably connected to at least one group of the guide rails through the slider, the free end of the piston rod of the side thrust cylinder is fixedly connected to the side upper profiling mold, the side thrust cylinder pushes the side upper profiling mold to slide on the guide rail, the tail of the side thrust cylinder is installed on the side thrust base through the cylinder lower connecting plate, and the blocking block is installed on the slider. The limit connecting block is installed on the side thrust base below the side thrust cylinder on the side of the side thrust mold close to the side thrust cylinder. After the piston rod of the side thrust cylinder retracts to the stroke position, the limit connecting block is supported on the blocking block. The guide rail is horizontally arranged on the side thrust base along the pushing direction of the side thrust cylinder. Two blocking columns are arranged on the side thrust base on both sides of each group of the guide rails. After the side thrust mold retracts to the stroke position, the blocking columns are supported on the side thrust mold.

8. The automatic covering device for automobile interior decoration with sewing thread according to claim 1, characterized in that: A positioning suction cup is installed in the installation groove of the sewing thread lifting mold and / or on the sewing thread lifting mold. The positioning suction cup is a vacuum suction cup used to absorb the skin on the sewing thread lifting mold.

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