Lug piece positioning structure of skylight edge covering die

Abstract

The invention relates to the field of automobile part machining. The lug piece positioning structure of the skylight edge covering die comprises a lower die and a die insert arranged on the lower die. The top surface of the mold insert is provided with a cavity for injecting edge covering plastic, and one side of the cavity is provided with a lug groove for placing an edge covering lug; mounting holes for subsequent assembly are formed in the edge covering lugs; a positioning hole is formed in the mold insert, and the position of the positioning hole is opposite to that of the mounting hole in the edge covering lug; the positioning mechanism comprises a positioning driving assembly and a positioning column which is arranged in the positioning hole and is in sliding fit with the positioning hole; by positioning the mounting holes in the edge covering lug, direct high-precision positioning of the edge covering lug relative to the skylight glass is achieved, accumulative errors can be effectively reduced, the positioning precision of the edge covering lug is improved, and positive significance is achieved for improving the precision and quality of products.

Description

Technical Field

[0001] The invention relates to the field of automobile parts processing, and in particular to an ear piece positioning structure of a sunroof hemming mould. Background Art

[0002] In recent years, with the rapid rise of my country's new energy electric vehicle industry and the further development of the traditional fuel vehicle industry, car sunroofs, as a common functional configuration, have been increasingly used in various types of cars. Sunroofs are usually made of high-strength tempered glass, which can not only form a good enclosure and support for the interior space of the car, but also have a good field of vision. Since glass is a fragile part, the glass sunroof needs to use the upper and lower molds to press the edges of the glass sunroof during the processing and manufacturing process, and then the glass is edged by injection molding; during the injection molding process, the metal mounting ears (edge ​​ear pieces) are formed and fixed on the plastic edge to provide an assembly basis for subsequent assembly.

[0003] However, in the actual production process, we found that the existing molds have no other auxiliary fixing methods when placing the mounting ears, and only use the ear-shaped grooves to place them, which can only limit the mounting ears in the left and right directions, but lack restrictions in the front and back directions. Before the injection molding edge is completed, the mounting ears are prone to fall off due to physical vibration or other factors, which may cause the workpiece to be scrapped at the least, or damage the mold at the worst, resulting in huge economic losses.

[0004] At the same time, the traditional hemming mold lacks effective positioning of the mounting ears, resulting in poor positioning accuracy of the mounting ears. Positioning is performed simply through the positioning grooves (ear piece type grooves) set on the upper and lower molds. Due to the accumulation of mold accuracy errors, mounting ear accuracy errors, assembly errors, etc., there is a large cumulative error, which in turn leads to product defects, affects subsequent assembly, and even makes assembly impossible, resulting in defective products. The mounting holes of the mounting ears are the subsequent assembly holes of the skylight glass after the hemming is completed. If the mounting holes can be used directly as the positioning basis, it will be helpful to reduce the cumulative error and improve product accuracy. It should also ensure that it does not affect the normal demolding and workpiece removal, and pay attention to economy, which undoubtedly puts forward new requirements for mold design. Summary of the invention

[0005] The object of the present invention is to provide an ear piece positioning structure of a skylight hemming mold with accurate positioning and small error.

[0006] To achieve the above-mentioned invention object, the technical solution adopted by the present invention is: an ear piece positioning structure of a sunroof hemming mold, comprising a lower mold and a mold insert arranged on the lower mold; a cavity for injecting hemming plastic is arranged on the top surface of the mold insert, and an ear piece groove for placing the hemming ear piece is arranged on one side of the cavity; the hemming ear piece is provided with a mounting hole for subsequent assembly;

[0007] The mold insert is provided with a positioning hole, and the position of the positioning hole is opposite to the mounting hole on the hemming ear piece;

[0008] It also includes a positioning mechanism, which includes a positioning drive component and a positioning column arranged in the positioning hole and slidingly matched with the positioning hole; the positioning column can be extended from the positioning hole under the drive of the positioning drive component to form a positioning protrusion that matches the mounting hole; or retreat into the positioning hole under the drive of the positioning drive component to eliminate the positioning protrusion during demolding.

[0009] Preferably, a frustoconical reducer is provided at the front end of the positioning column.

[0010] Preferably, the edging ear piece is L-shaped, and the horizontal edge of the L-shape rests in the ear piece groove, and the vertical edge constitutes a connecting edge and is attached to the front side of the mold insert; a mounting hole is set in the middle of the connecting edge; the positioning hole extends along the front and rear directions of the front and rear mold inserts, and passes through the front and rear surfaces of the mold insert; the rear end of the positioning column is connected to the positioning drive assembly.

[0011] Preferably, the positioning drive assembly includes a vertical driving rocker arm, the middle part of which is installed on the lower mold and forms a hinge with the lower mold that can swing along the front and rear directions; the upper end of the driving rocker arm is connected to the positioning column through a connecting fork, and the lower end is connected to the telescopic end of the driving cylinder through a connecting rod.

[0012] Preferably, a pair of connecting ears are provided at the upper end of the driving rocker arm, a pair of vertical first holes are provided on the connecting ears, a first pin shaft matched with the first hole is provided at one end of the connecting fork, the first pin shaft is passed through the first hole to form a hinge connection between the upper end of the driving rocker arm and the connecting fork; the other end of the connecting fork is hinged to the rear end of the positioning column;

[0013] The lower end of the driving rocker arm is provided with a rod hole which penetrates the driving rocker arm along the front-to-back direction, and a pair of vertical second holes are provided on the two side walls of the rod hole; one end of the connecting rod is provided with a second pin shaft which matches with the second hole, and the second pin shaft is passed through the second hole to form a hinge connection between the lower end of the driving rocker arm and the connecting rod; the other end of the connecting rod is fixedly sleeved with the telescopic end of the driving cylinder.

[0014] Preferably, an intermediate sleeve is arranged outside the middle section of the driving swing rod, and the intermediate sleeve is installed in a sleeve hole penetrating the upper and lower surfaces of the lower mold; the width of the center hole of the intermediate sleeve in the left-right direction is consistent with the thickness of the driving swing rod in the left-right direction, and the width of the center hole in the front-back direction is adapted to the swing amplitude of the driving swing rod in the front-back direction;

[0015] A pair of pin holes are arranged on the left and right side walls of the intermediate sleeve, a swing pin matching the pin holes is arranged on the middle section of the driving swing rod, and the swing pin of the driving swing rod is inserted into the pin hole to form a hinge with the intermediate sleeve.

[0016] Preferably, the positioning hole is a stepped hole with a small front section and a large rear section, and the positioning column is a stepped column with a small front section and a large rear section; the positioning column limits the forward extension length of the positioning column by abutting against the stepped surface of the positioning hole.

[0017] Preferably, the positioning mechanism further comprises a rear-swing limit block, which is fixedly arranged on the rear side of the upper end of the driving swing rod, and the front end surface of the rear-swing limit block is an inclined surface.

[0018] The beneficial effects of the present invention are mainly reflected in that, by positioning the mounting holes on the hemming ear pieces, the hemming ear pieces are directly and accurately positioned relative to the sunroof glass, which can effectively reduce the cumulative error and improve the positioning accuracy of the hemming ear pieces, which has a positive significance for improving the precision and quality of products. Specifically, the present invention opens a positioning hole on the mold insert and installs a positioning column in the positioning hole. Before the injection molding, the positioning column is driven to extend, and the mounting hole of the hemming ear piece is directly aligned and sleeved on the positioning column, so as to directly position the hemming ear piece; after the injection molding is completed, when demolding is required, the positioning column can be driven to be directly retracted into the positioning hole without affecting the demolding and removal of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of installing the mold insert on the lower mold of the present invention;

[0020] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0021] Figure 3 Front view of the hemming ear piece being installed on the mold insert (partial) Figure 4 for;

[0022] Figure 4 for Figure 3 BB direction view of the structure shown in;

[0023] Figure 5 It is a structural schematic diagram of the positioning mechanism of the present invention;

[0024] Figure 6 It is a schematic diagram of the internal structure of the positioning mechanism of the present invention. DETAILED DESCRIPTION

[0025] The present invention discloses a sunroof edge wrapping mold, which is mainly composed of an upper mold and a lower mold. The upper mold and the lower mold can be adaptively installed with mold inserts according to the sunroof edge wrapping requirements. The sunroof glass is sandwiched between the upper and lower molds. The edges of the sunroof glass are injection molded and edge wrapped through the mold inserts and the mold cavities provided on the upper and lower mold bodies. Whether the sunroof glass adopts a push-pull expansion type or a fixed type, in order to realize the subsequent assembly of the sunroof glass on the roof, an edge wrapping ear piece 4 needs to be provided on the edge wrapping during the edge wrapping process, so that the subsequent installation of the sunroof glass can be realized through the edge wrapping ear piece 4.

[0026] However, during the injection molding process, the hemming ear piece not only needs to ensure its positioning accuracy, but also needs to fix its own position to ensure its accuracy during the injection molding process, and also needs to prevent subsequent problems caused by its loss of position and falling.

[0027] To this end, the present invention also discloses an anti-drop structure of the ear piece and a positioning structure of the ear piece on this basis. Since they are mainly related to the lower mold 1, the specific structure of the upper mold is not shown in the present invention, as follows: The present invention includes a lower mold 1 and a mold insert 2 arranged on the lower mold 1. The top surface of the mold insert 2 is provided with a cavity 3 for injecting the edge plastic. The upper and lower molds and the cavity 3 on the corresponding mold insert 2 together form an injection molding space, such as Figure 1 As shown in FIG, one side of the cavity 3 is provided with an ear piece groove for placing the hemming ear piece 4.

[0028] The anti-drop structure of the ear piece of the present invention is mainly to achieve the anti-drop fixation by magnetic adsorption of the edge ear piece 4 by the magnetic block 6, and is mainly to form adsorption on the metal edge ear piece with ferromagnetism. The ear piece positioning structure is mainly to achieve the positioning of the overall position of the edge ear piece by directly positioning the mounting hole 8 on the edge ear piece 4, and is mainly used for the ear piece on which the mounting hole 8 for the subsequent assembly of the sunroof glass on the vehicle is provided. Of course, the two can be used alone or in combination, and have better characteristics when used in combination. When it is used alone, it can be flexibly adapted according to the specific form of the processed edge ear piece 4.

[0029] In the embodiments of the present invention, mainly Figure 2 The L-shaped hemming ear piece 4 structure shown in FIG. Figure 1 and 2 As shown in the figure, the hemming ear piece 4 is L-shaped, and the horizontal side of the L-shape is placed in the ear piece groove, and the vertical side forms a connecting edge 7 and is attached to the front side of the mold insert 2. A mounting hole 8 for subsequent assembly is provided in the middle of the connecting edge 7. Generally, the mounting hole 8 is provided in the middle of the connecting edge 7.

[0030] The anti-drop structure and the positioning structure will be described in detail below. Figure 2 As shown in , the vertical edge of the hemming ear piece 4 is located at the front, and vice versa, as shown in Figure 4 As shown in , the left is the front and the right is the back. Figure 6 As shown in the figure, the right is the front and the left is the back:

[0031] 1. Anti-drop structure:

[0032] In addition to the above basic components, Figure 3 and 4 As shown in , the anti-drop structure also includes an anti-drop component, and the anti-drop component includes an adsorption hole 5, which is a hole for installing a magnetic block 6, which is arranged in the mold insert 2. The magnetic block 6 is arranged in the adsorption hole 5, and the position of the magnetic block 6 is opposite to the connecting edge 7 of the hemming ear piece 4. The magnetic block 6 forms a magnetic adsorption to the connecting edge 7 of the hemming ear piece 4.

[0033] The simplest adsorption hole 5 can be a blind hole set on the front elevation of the mold insert 2, and the magnetic block 6 can be directly embedded in the blind hole. There are many ways to set the position of the blind hole, as long as the installation of the magnetic block 6 is met and the installation of the positioning structure is not affected.

[0034] Of course, since the magnetic block 6 is usually required to be replaced after being worn or losing its magnetism during long-term use, this blind hole installation method is simple in structure but not convenient for subsequent maintenance. Figure 4 As shown in , it is installed in the adsorption hole 5 in a detachable manner.

[0035] In this detachable installation structure, since it may be used in combination with the positioning mechanism, in order to prevent interference, the specific position of the adsorption hole 5 on the front elevation of the mold insert 2 can be located on the left or right side of the mounting hole 8, and the position can be adjusted in a specific manner without affecting the installation of the positioning structure at the mounting hole 8. Since it is located on the upper and lower sides, it is in the same vertical plane with the positioning structure and has a certain interference effect, so it is generally set on the left or right side.

[0036] The detachable installation structure of the magnetic block 6 is as follows: Figure 4 As shown in the figure, the adsorption hole 5 is a stepped through hole with a large section near the connecting edge 7 and a small section away from the connecting edge 7, that is, the left section is large and the right section is small in the figure, and it runs through the front and back surfaces of the mold insert 2. The anti-drop assembly also includes an adsorption head 9, a mounting bolt 10 and an elastic top pressure piece 11.

[0037] The adsorption head 9 is located in the large section of the adsorption hole 5 and forms a sliding fit with the large section of the adsorption hole 5 along the length direction of the adsorption hole 5. The shape of the adsorption head 9 can be a square column or a cylinder. The adsorption head 9 is provided with an end groove at one end facing the connecting edge 7 and a threaded hole at the other end. Figure 4 As shown in the figure, the left end of the adsorption head 9 is provided with an end groove, and the right end is provided with a threaded hole. The magnetic block 6 is embedded in the end groove (interference fit or auxiliary bonding is possible), and the rod of the mounting bolt 10 passes through the small section of the adsorption hole 5 and enters the adsorption hole 5, and is inserted into the threaded hole to form a threaded connection with the adsorption head 9. The elastic top pressure piece 11 is located between the adsorption head 9 and the stepped surface of the adsorption hole 5.

[0038] During installation, press the adsorption head 9 into the adsorption hole 5 (at this time, the elastic top pressure piece 11 is in a compressed state), and then insert the mounting bolt 10 from the rear side (that is, Figure 4 After that, the mounting bolt 10 is rotated to connect the mounting bolt 10 with the adsorption head 9. The mounting bolt 10 is rotated continuously until the mounting bolt 10 adjusts the front end surface of the adsorption head 9 to be flush with the front elevation of the mold insert 2, that is, at this time, the magnetic block 6 is also flush with the elevation of the mold insert 2, and can form a stable contact with the connecting edge 7 of the hemming ear piece 4, so as to achieve stable adsorption.

[0039] When the adsorption head 9 needs to be disassembled, the mounting bolt 10 is rotated in the opposite direction, and the adsorption head 9 is ejected under the action of the elastic pressing member 11, and the elastic pressing member 11 can be in the form of a pressing spring or a pressing spring sheet group. By removing the adsorption head 9, the adsorption head 9 and the magnetic block 6 thereon can be quickly replaced. Of course, in order to further improve the performance of the present invention, a connecting hole can be provided between the end groove and the threaded hole of the adsorption head 9. After the mounting bolt 10 is detached from the adsorption head 9, the magnetic block 6 can be quickly detached from the end groove through the connecting hole in conjunction with an ejector pin, etc., which is more convenient to use.

[0040] In addition, in order to accommodate the head of the mounting bolt 10 and facilitate the rotation of the mounting bolt 10, the small end of the adsorption hole 5 (that is, Figure 4 The right end of the mounting bolt 10 is provided with a blind hole 12 for receiving the head of the mounting bolt 10. The head of the mounting bolt 10 is provided with a hexagon screw head, and the mounting bolt 10 can be quickly rotated by inserting a matching hexagon wrench into the hexagon screw head.

[0041] 2. Positioning structure:

[0042] In addition to the above-mentioned basic components such as the lower mold 1 and the mold insert 2, under the positioning structure, the mold insert 2 is provided with a positioning hole 13, and the position of the positioning hole 13 is opposite to the mounting hole 8 on the hemming ear piece 4. Figure 2 , 5As shown in Figures 5 and 6, only the partial structure of the mold insert 2 provided with the ear-shaped groove position is shown in Figures 5 and 6. In the form of the L-shaped hemming ear 4 shown in the figure, the positioning hole 13 extends along the front and rear directions of the front and rear mold inserts 2 and passes through the front and rear surfaces of the mold insert 2.

[0043] It also includes a positioning mechanism, which includes a positioning drive assembly and a positioning column 14 disposed in the positioning hole 13 and forming a sliding fit with the positioning hole 13. The positioning drive assembly is used to drive the positioning column 14 to move forward and backward in the positioning hole 13, and the rear end of the positioning column 14 is connected to the positioning drive assembly. In other words, the positioning column 14 can be extended from the positioning hole 13 under the drive of the positioning drive assembly to form a positioning protrusion that matches the mounting hole 8, and at this time, the mounting hole 8 on the connecting edge 7 of the hemming ear piece 4 can be sleeved on the positioning protrusion. Or it can be retreated into the positioning hole 13 under the drive of the positioning drive assembly to eliminate the positioning protrusion during demoulding, so as to facilitate lifting the skylight glass after the injection molding is completed, and prevent the positioning column 14 from being inserted into the mounting hole 8 of the hemming ear piece 4, causing the workpiece to be unable to be lifted.

[0044] Considering the need to install the hemming ear piece 4 on the positioning column 14, in order to facilitate operation, a frustum-shaped reducer 15 is provided at the front end of the positioning column 14, which changes from small to large for easy installation.

[0045] The specific structural forms of the positioning drive assembly of the present invention are various. For example, in theory, the positioning drive assembly can be a linear cylinder arranged at the rear end of the positioning column 14, which directly drives the positioning column 14 to move forward and backward. However, since the cavity behind the glass body is sandwiched between the upper and lower molds, the size is limited and it is not suitable to directly install the linear cylinder inside.

[0046] To this end, the driving cylinder 19 should be mounted outside the main part of the mold and driven by a certain transmission structure, such as Figure 5 and 6 As shown in , the positioning drive assembly includes a vertical driving swing rod 16, the middle part of which is mounted on the lower mold 1 and is hinged with the lower mold 1 so as to be able to swing in the front-back direction. The upper end of the driving swing rod 16 is connected to the positioning column 14 through a connecting fork 17, and the lower end is connected to the telescopic end of the driving cylinder 19 through a connecting rod 18.

[0047] When in use, the telescopic end of the driving cylinder 19 extends out, and the lower end of the driving swing rod 16 is pushed to move toward the left side of the figure through the connecting rod 18, so that the upper end of the driving swing rod 16 can be driven to swing forward (that is, Figure 6 The driving force is transmitted to the positioning column 14 through the connecting fork 17, driving the positioning column 14 to extend from the positioning hole 13. On the contrary, when the telescopic end of the driving cylinder 19 is recovered, the positioning column 14 can be driven to retract into the positioning hole 13.

[0048] In order to further optimize its swing structure and improve the actuation stability, the driving swing rod 16, the connecting fork 17 and the connecting rod 18 of the present invention can be connected in the following manner: Figure 5 and 6 As shown in FIG. 1 , the upper end of the driving rocker 16 is provided with a pair of connecting ears 20, and the connecting ears 20 are provided with a pair of vertical first holes 21. One end of the connecting fork 17 is provided with a first pin shaft 22 matched with the first hole 21, and the first pin shaft 22 is inserted into the first hole 21 to form a hinge between the upper end of the driving rocker 16 and the connecting fork 17. The other end of the connecting fork 17 is hinged to the rear end of the positioning column 14.

[0049] The lower end of the driving swing rod 16 is provided with a rod hole 23 that penetrates the driving swing rod 16 in the front-to-back direction, and a pair of vertical second holes 24 are provided on the two side walls of the rod hole 23. One end of the connecting rod 18 is provided with a second pin shaft 25 that matches the second hole 24, and the second pin shaft 25 is inserted into the second hole 24 to form a hinge connection between the lower end of the driving swing rod 16 and the connecting rod 18. The other end of the connecting rod 18 is sleeved and fixed with the telescopic end of the driving cylinder 19.

[0050] The driving swing rod 16 is a force transmission component from the outside of the mold (bottom of the lower mold 1) to the inside of the mold (upper part of the lower mold). It can be directly arranged in the clearance channel on the lower mold 1, and the middle section is directly hinged with the side wall of the clearance channel. However, in order to further improve its stability, a better way of the present invention can also be that an intermediate sleeve 26 is arranged outside the middle section of the driving swing rod 16, and the intermediate sleeve 26 is installed in the sleeve hole (that is, the clearance channel) that runs through the upper and lower surfaces of the lower mold 1. The width of the center hole 27 of the intermediate sleeve 26 in the left and right direction is consistent with the thickness of the driving swing rod 16 in the left and right direction, ensuring the stability of the driving swing rod 16 in the left and right direction and avoiding movement. The width of the center hole 27 in the front-to-back direction is adapted to the swing amplitude of the driving swing rod 16 in the front-to-back direction, meeting the need for the driving swing rod 16 to swing in the front-to-back direction, leaving enough swing space. The intermediate sleeve 26 is generally installed in the sleeve hole (clearance channel) of the lower mold 1 by fastening bolts.

[0051] When the intermediate sleeve 26 is adopted, a pair of pin holes are provided on the left and right side walls of the intermediate sleeve 26, and a swing pin 28 matching the pin hole is provided on the middle section of the driving rocker arm 16. The swing pin 28 of the driving rocker arm 16 is inserted into the pin hole to form a hinge with the intermediate sleeve 26.

[0052] In addition, in order to limit the forward and backward movement distance of the positioning column 14 to prevent it from excessive movement, when the positioning column 14 is limited in front, a better approach of the present invention may be that the positioning hole 13 is a stepped hole with a small front section and a large rear section, and the positioning column 14 is a stepped column with a small front section and a large rear section. The positioning column 14 is formed to limit the forward extension length of the positioning column 14 by resisting the stepped surface of the positioning hole 13.

[0053] When the positioning column 14 is limited at the rear, a rear swing limit block 29 can be set. The rear swing limit block 29 is set on the rear side of the upper end of the driving rocker arm 16, and is fixedly installed next to the sleeve hole of the lower mold 1 to achieve stable fixation. The front end face of the rear swing limit block 29 is an inclined surface to achieve surface contact with the driving rocker arm 16.

Claims

1. An ear piece positioning structure of a skylight hemming mold, comprising a lower mold (1) and a mold insert (2) arranged on the lower mold (1); a cavity (3) for injecting hemming plastic is arranged on the top surface of the mold insert (2); an ear piece groove for placing an hemming ear piece (4) is arranged on one side of the cavity (3); and a mounting hole (8) for subsequent assembly is arranged on the hemming ear piece (4); Features: The mold insert (2) is provided with a positioning hole (13), and the position of the positioning hole (13) is opposite to the mounting hole (8) on the hemming ear piece (4); The invention also comprises a positioning mechanism, which comprises a positioning drive assembly and a positioning column (14) which is arranged in the positioning hole (13) and forms a sliding fit with the positioning hole (13); the positioning column (14) can be driven by the positioning drive assembly to extend from the positioning hole (13) to form a positioning protrusion which matches the mounting hole (8); or can be driven by the positioning drive assembly to retract into the positioning hole (13) to eliminate the positioning protrusion during demoulding.

2. The ear piece positioning structure of the skylight hemming mold according to claim 1, characterized in that: A frustum-shaped reducing head (15) is provided at the front end of the positioning column (14).

3. The ear piece positioning structure of the skylight hemming mold according to claim 2, characterized in that: The edging ear piece (4) is L-shaped, and the horizontal side of the L-shape rests in the ear piece groove, and the vertical side forms a connecting edge (7) and is attached to the front side of the mold insert (2); a mounting hole (8) is provided in the middle of the connecting edge (7); the positioning hole (13) extends along the front and rear directions of the front and rear mold inserts (2) and passes through the front and rear surfaces of the mold insert (2); the rear end of the positioning column (14) is connected to the positioning drive assembly.

4. The ear piece positioning structure of the skylight hemming mold according to claim 3, characterized in that: The positioning drive assembly comprises a vertical driving rocker arm (16), the middle part of which is mounted on the lower mold (1) and is hinged with the lower mold (1) so as to be able to swing in the front-rear direction; the upper end of the driving rocker arm (16) is connected to the positioning column (14) via a connecting fork (17), and the lower end is connected to the telescopic end of the driving cylinder (19) via a connecting rod (18).

5. The ear piece positioning structure of the skylight hemming mold according to claim 4, characterized in that: A pair of connecting ears (20) are provided at the upper end of the driving rocker (16), and a pair of vertical first holes (21) are provided on the connecting ears (20); a first pin shaft (22) matching with the first hole (21) is provided at one end of the connecting fork (17), and the first pin shaft (22) is inserted into the first hole (21) to form a hinge connection between the upper end of the driving rocker (16) and the connecting fork (17); the other end of the connecting fork (17) is hinged to the rear end of the positioning column (14); The lower end of the driving rocker arm (16) is provided with a rod hole (23) penetrating the driving rocker arm (16) in the front-rear direction, and a pair of vertical second holes (24) are provided on the two side walls of the rod hole (23); one end of the connecting rod (18) is provided with a second pin shaft (25) matched with the second hole (24), and the second pin shaft (25) is penetrated in the second hole (24) to form a hinge connection between the lower end of the driving rocker arm (16) and the connecting rod (18); the other end of the connecting rod (18) is sleeved and fixed with the telescopic end of the driving cylinder (19).

6. The ear piece positioning structure of the skylight hemming mold according to claim 5, characterized in that: An intermediate sleeve (26) is arranged outside the middle section of the driving swing rod (16), and the intermediate sleeve (26) is installed in a sleeve hole penetrating the upper and lower surfaces of the lower mold (1); the width of the center hole (27) of the intermediate sleeve (26) in the left-right direction is consistent with the thickness of the driving swing rod (16) in the left-right direction, and the width of the center hole (27) in the front-back direction is adapted to the swing amplitude of the driving swing rod (16) in the front-back direction; A pair of pin holes are arranged on the left and right side walls of the intermediate sleeve (26), and a swing pin (28) matching with the pin hole is arranged on the middle section of the driving swing rod (16). The swing pin (28) of the driving swing rod (16) is inserted into the pin hole to form a hinge connection with the intermediate sleeve (26).

7. The ear piece positioning structure of the skylight edge encapsulation mold according to claim 6, characterized in that: The positioning hole (13) is a stepped hole with a small front section and a large rear section, and the positioning column (14) is a stepped column with a small front section and a large rear section; the positioning column (14) limits the forward extension length of the positioning column (14) by abutting against the stepped surface of the positioning hole (13).

8. The ear piece positioning structure of the skylight edge encapsulation mold according to claim 7, characterized in that: The positioning mechanism also includes a rear swing limit block (29), which is fixedly arranged on the rear side of the upper end of the driving swing rod (16), and the front end surface of the rear swing limit block (29) is an inclined surface.

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