Polyurethane (PUR) fabric middle edge covering mechanism and automotive trim edge covering device

Abstract

The invention provides a PUR fabric middle edge covering mechanism and an automotive trim edge covering device, the PUR fabric middle edge covering mechanism is arranged beside a lower die, the PUR fabric middle edge covering mechanism comprises a clamping assembly, a lifting assembly, a translation assembly and an inclined withdrawing guide assembly, the edge of a skin can be clamped through the clamping assembly, and the clamping assembly is driven to ascend, descend and translate through the lifting assembly and the translation assembly; according to the invention, the clamping assembly is arranged, so that the clamped skin is coated on the corresponding skeleton, and the edge of the skin can extend upwards and then be pushed forwards, so that the edge of the skin is turned up from one surface of the skeleton to be coated on the edge of the other surface and is coated on the edge of the skeleton, and in addition, due to the inclined withdrawing guide assembly, a guide effect can be achieved when the clamping assembly descends and retreats; the clamping assembly drives the edge of the clamped skin to retract backwards relative to the lower die in the obliquely downward direction, so that the skin can be attached to the edge of the framework in the direction after the skin is turned up to the other surface of the framework, and edge covering of the surface on the edge of the framework can be achieved under the condition that the stretching amount of the skin of the PUR fabric is small.

Description

Technical Field

[0001] This invention belongs to the field of automotive processing equipment technology, specifically relating to a PUR fabric center binding mechanism and an automotive interior binding device. Background Technology

[0002] Cars are equipped with various interior trim components, including center console trim, A-pillar trim, B-pillar trim, etc. These components typically vary in shape, color, and material between different car models. Interior trim components consist of a frame covered with a covering. Traditionally, these coverings are made of fabric or leather. Fabric has a relatively poor appearance and is prone to aging and difficult to clean after getting dirty. Leather is relatively expensive and requires more maintenance; sharp objects can easily scratch its surface, making it susceptible to damage. In contrast, using PUR (polyurethane) fabric as the cover for interior trim components offers several advantages: it has excellent anti-aging properties, is not easily aged by long-term use or exposure to sunlight, and has a long service life; it is environmentally friendly, producing less odor inside the car, and the factory processing environment is more friendly; it has a better appearance, enhancing the sense of luxury in the car; and it is relatively lightweight, contributing to the car's weight reduction, among other benefits.

[0003] However, PUR fabric is relatively stiff. When using traditional automated edging equipment, the edge of the fabric covering the frame needs to be stretched significantly in both directions to allow it to roll up and adhere to the other side of the frame, thus achieving the edging and ensuring a good fit between the fabric and frame edges. During this process, due to the large stretch, the PUR fabric can easily develop irregular patterns after being applied to the frame, resulting in a poor appearance of the finished interior parts and even damage or tearing. On the other hand, manually edging the PUR fabric leads to low production efficiency and inconsistent product quality.

[0004] Therefore, in order to achieve efficient and high-quality bonding and edge binding of PUR fabric outer skin, a new type of automatic edge binding mechanism is needed. Summary of the Invention

[0005] This invention addresses the aforementioned problems by providing an automated binding mechanism capable of efficiently and effectively covering the outer layer of PUR fabric onto a corresponding skeleton. The invention employs the following technical solution:

[0006] This invention provides a PUR fabric center binding mechanism, disposed next to the lower mold of an automotive interior binding device, for binding the center of the edge between the outer skin and the skeleton of the PUR fabric. The mechanism features the following technical characteristics: a clamping assembly for clamping the edge of the outer skin; a lifting assembly for moving the clamping assembly up and down; a translation assembly for moving the clamping assembly forward toward the lower mold or backward; and a diagonal guide assembly for guiding the clamping assembly during descent and retraction, causing the clamping assembly to retract diagonally downward relative to the lower mold.

[0007] The PUR fabric center binding mechanism provided by the present invention may also have the following technical features: the clamping assembly includes a base, a binding block disposed on the base, and a clamping block movably disposed on the base; the clamping block cooperates with the binding block to clamp the edge of the outer skin; the translation assembly includes a servo motor for driving the base to translate; the oblique withdrawal guide assembly includes a pair of oblique withdrawal guide members and a pair of guide wheels; the oblique withdrawal guide member has an elongated guide surface facing away from the lower mold and extending obliquely downward in the withdrawal direction; the pair of guide wheels are rotatably disposed on both sides below the base via corresponding brackets for rolling along the guide surface on the corresponding side during withdrawal, thereby causing the clamping assembly to withdraw obliquely downward.

[0008] The PUR fabric center binding mechanism provided by the present invention may also have the following technical features, wherein the translation component further includes a lead screw, a nut seat disposed on the lead screw, a synchronous pulley and a synchronous belt, the nut seat is fixed to the bottom of the base, the lead screw is disposed above the servo motor and is connected to the output shaft of the servo motor through the synchronous pulley and the synchronous belt.

[0009] The PUR fabric center binding mechanism provided by the present invention may also have the following technical features: the clamping assembly further includes a clamping guide component and a clamping cylinder; the base is wedge-shaped with a mounting groove in the middle; a support arm extends from the lower side; and a connecting plate extends from the upper side; the binding block is fixed on the support arm; the clamping block is tilted and movable above the binding block relative to the lower mold via the clamping guide component; and the clamping cylinder is disposed in the mounting groove, with its piston rod tilted upward and connected to the clamping block via a transmission component.

[0010] The PUR fabric center binding mechanism provided by the present invention may also have the following technical features, wherein the binding block has a binding bottom surface and a binding inclined surface connected to the binding bottom surface, the shape and inclination angle of the binding inclined surface are matched with the inner edge of the skeleton, and is used to cover the edge of the skin onto the inner edge of the skeleton when the clamping assembly is retracted in a direction obliquely downward relative to the lower mold.

[0011] The PUR fabric center binding mechanism provided by this invention may also have the following technical features: the lifting assembly includes a lifting bracket, a first lifting cylinder, and a second lifting cylinder. The first and second lifting cylinders are stacked back-to-back, with their piston rods pointing upwards and downwards, respectively. The piston rod of the first lifting cylinder points upwards and is fixed to the connecting plate, while the piston rod of the second lifting cylinder points downwards and is fixed to the lifting bracket. The piston rod of the second lifting cylinder is longer than that of the first lifting cylinder. When the piston rod of the first lifting cylinder extends and the piston rod of the second lifting cylinder retracts, the height of the clamping assembly is a predetermined binding height. When the piston rod of the first lifting cylinder retracts and the piston rod of the second lifting cylinder extends, the height of the clamping assembly is a predetermined binding height. When the piston rods of both the first and second lifting cylinders extend, the height of the clamping assembly is a predetermined maximum stretching height. Relative to the skeleton mounted on the lower mold, the binding height is lower than the edge of the skeleton, the binding height is flush with the edge of the skeleton, and the maximum stretching height is higher than the edge of the skeleton with a height difference of less than or equal to 10 mm.

[0012] The PUR fabric center binding mechanism provided by the present invention may also have the following technical features: the outer end of the binding block is Z-shaped and has a curved shape that matches the edge of the skeleton; the material of the binding block is brass; the outer end of the clamping block is an obtuse-angled L-shaped that matches the outer end of the binding block; and the surface of the clamping block is coated with Teflon material.

[0013] The PUR fabric center binding mechanism provided by the present invention may also have the following technical features: the automotive interior binding device uses a heating lamp to heat the adhesive-coated skin and the frame; the outer edge of the clamping block has a plurality of triangular teeth arranged in sequence; when the clamping block and the binding block cooperate to clamp the skin edge, a triangular through hole is formed between two adjacent triangular teeth and the surface of the skin, allowing the light from the heating lamp to pass through.

[0014] The PUR fabric center binding mechanism provided by the present invention may also have the following technical feature: the binding block is provided with a flow channel for the flow of coolant, and the inlet and outlet of the flow channel are located on the side of the binding block.

[0015] This invention provides an automotive interior trim edging device, which has the following technical features: the device includes an upper mold for carrying a frame; a lower mold for cooperating with the upper mold to cover the skin onto the frame; and a plurality of edging mechanisms for covering the edges of the skin onto the frame, wherein the plurality of edging mechanisms includes at least one PUR fabric center edging mechanism for edging the center edge of the frame, and the PUR fabric center edging mechanism is any of the aforementioned PUR fabric center edging mechanisms.

[0016] The role and effect of invention

[0017] The PUR fabric center binding mechanism and automotive interior binding device provided by the present invention are arranged next to the lower mold and include a clamping component, a lifting component, a translation component, and an oblique withdrawal guide component. Therefore, the clamping component can clamp the edge of the skin to be bound, and the lifting and translation components can drive the clamping component to lift and translate, thereby wrapping the clamped skin onto the corresponding frame. The skin edge can be extended upward and pushed forward, so that the skin edge can be rolled from one surface of the frame to the edge of another surface, wrapped around the frame edge. In addition, due to the oblique withdrawal guide component, it can guide the clamping component when it descends and retracts, so that the clamping component, with the clamped skin edge, retracts backward relative to the lower mold in an oblique downward direction. This allows the skin to be rolled onto the other surface of the frame and then attached to the frame edge in this direction. Thus, the binding of the surface of the PUR fabric to the frame edge can be achieved with a small amount of skin stretch, so that the skin of the PUR fabric can be well attached to the frame surface without texture disorder, skin tearing or damage. Attached Figure Description

[0018] Figure 1 This is a perspective view of the automotive interior trim edging device in an embodiment of the present invention;

[0019] Figure 2 This is a perspective view of the upper mold portion in an embodiment of the present invention;

[0020] Figure 3 This is a top view of the edge-binding mechanism in an embodiment of the present invention;

[0021] Figure 4 This is a top view of the edge-binding mechanism and the positioning pin mechanism in an embodiment of the present invention;

[0022] Figure 5 This is a perspective view of the PUR fabric center binding mechanism in use in an embodiment of the present invention;

[0023] Figure 6This is a top view of the PUR fabric center binding mechanism in use in an embodiment of the present invention;

[0024] Figure 7 This is a cross-sectional view of the PUR fabric middle binding mechanism in use in an embodiment of the present invention;

[0025] Figure 8 This is a perspective view of the clamping base in an embodiment of the present invention;

[0026] Figure 9 This is a perspective view of the edge-binding block and the clamping block in an embodiment of the present invention;

[0027] Figure 10 This is a perspective view of the edge-binding block in an embodiment of the present invention;

[0028] Figure 11 yes Figure 1 Enlarged view of the inner part of frame A;

[0029] Figure 12 yes Figure 1 Enlarged view of the inner part of the middle frame B;

[0030] Figure 13 This is a schematic diagram of the edge-wrapping process in an embodiment of the present invention. Figure 1 ;

[0031] Figure 14 This is a schematic diagram of the edge-wrapping process in an embodiment of the present invention. Figure 2 ;

[0032] Figure 15 This is a schematic diagram of the edge-wrapping process in an embodiment of the present invention. Figure 3 ;

[0033] Figure 16 This is a schematic diagram of the edge-wrapping process in an embodiment of the present invention. Figure 4 ;

[0034] Figure 17 This is a schematic diagram of the edge-wrapping process in an embodiment of the present invention. Figure 5 ;

[0035] Figure 18 yes Figure 17 A magnified view of the area inside frame C.

[0036] Figure label:

[0037] 100 automotive interior trim binding device; 10 PUR fabric center trim binding mechanism; 11 mechanism bracket;

[0038] Clamping assembly 12; Clamping base 121; Support column 1211; Mounting groove 1212; Bevel 1213; Connecting plate 1214; Fixing plate portion 1215; Fixing hole 1215a; Edge banding block 122; Fixing portion 1221; First extension portion 1222; Recess 12221; Second extension portion 1223; Third extension portion 1224; Clearance notch 1225; Clearance groove 1226; Edge banding bevel 1223a; Edge banding bottom surface 1224a; Clamping block 123; Fixing portion 1231; Clamping head 1232; Clearance notch 12 33; Triangular tooth 1234; Clamping transmission component 124; Y-type adapter 1241; T-type connector 1242; L-type connector 1243; Clamping guide component 125; Guide rail 1251; Slider 1252; Clamping cylinder 126; Lifting assembly 13; Lifting bracket 131; Base plate 1311; Vertical plate 1312; First lifting cylinder 132; Second lifting cylinder 133; Lifting guide component 134; Guide rail 1341; Slider 1342; Translation assembly 14; Translation guide component 141; Guide rail 1411; Slider 1412 ; Lead screw 143; Synchronous belt 144; Synchronous pulley 145; Servo motor 142; Inclined guide assembly 15; Inclined push guide 151; Guide surface 1511a; Guide wheel 152; Guide wheel bracket 153; Corner binding mechanism 20; Front push cylinders 5-1, 5-2, 5-3, 5-4, 9-1, 9-2, 10-1; Edge binding mechanism 60; Front push cylinders 12-1, 12-2, 12-3, 12-4; Upper mold part 30; Upper mold frame 31; Upper mold 32; Pressing mechanism 33; Front push cylinders 13-1 and 13-2, 1 4-1, 14-2, 14-3; Lower mold part 40; Lower mold frame 41; Lower mold 42; Lower mold flipping mechanism 43; Positioning pin mechanism 44; Positioning pin 441; Positioning pin cylinders 11-1, 11-2, 11-3, 11-4, 11-5, 11-6; Forward pushing mechanism 45; Heating and transplanting part 50; Transplanting frame 51; Heating lamp tube 52; Translation mechanism 53; Transplanting motor 54; Surface skin 8; Surface skin edge 81; Skeleton 9; Main bonding surface 9a; Secondary bonding surface 9b; First edge part 91; Second edge part 92; Main board part 93. Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of the present invention easy to understand, the following describes in detail the PUR fabric center binding mechanism and automotive interior binding device of the present invention with reference to embodiments and accompanying drawings.

[0040] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] <Example>

[0042] This embodiment provides an automotive interior trim edging device for bonding a skin to a corresponding interior trim component frame and edge-trimming the frame to form the B-pillar center interior trim component. The frame can be a metal or hard plastic component; the skin is a PUR fabric (moisture-curing reactive polyurethane hot melt adhesive fabric) pre-coated with adhesive on one side. As mentioned above, traditional edging equipment for this type of fabric is prone to uneven texture due to the large stretching amount. This automotive interior trim edging device aims to solve this problem.

[0043] Figure 1 This is a perspective view of the automotive interior trim edging device in this embodiment. Figure 2 This is a perspective view of the upper mold in this embodiment.

[0044] like Figure 1 and Figure 2 As shown, the automotive interior trim edging device 100 includes a frame, an upper mold part 30, a lower mold part 40, and a heating and transfer part 50.

[0045] The upper mold part 30 includes an upper mold frame 31, an upper mold 32, multiple pressing mechanisms 33, and a lifting mechanism (not shown in the figure).

[0046] The upper mold frame 31 is movably mounted on the machine frame.

[0047] The upper mold 32 is fixed to the bottom of the upper mold frame 31. The lower part of the upper mold 32 has a shape that matches one surface (non-overlapping surface) of the skeleton for placing the skeleton.

[0048] Multiple clamping mechanisms 33 are used to clamp the skeleton placed on the upper mold 32 in different directions, thereby gripping and fixing the skeleton to the upper mold 32. Each clamping mechanism 33 includes a push block and a front push cylinder that drives the push block to move. In this embodiment, the upper mold mechanism 30 is provided with five clamping mechanisms 33, and correspondingly provided with front push cylinders 13-1 and 13-2, 14-1 to 14-3. Among them, the front push cylinder 14-3 is located on one side of the upper mold 32 in the length direction, pushing the corresponding push block towards one edge of the skeleton; the remaining front push cylinders are all located above the upper mold 32, and are respectively used to push the corresponding push block towards the two edges in the width direction of the upper mold 32.

[0049] The lifting mechanism is used to move the upper mold frame 31 and the upper mold 32 up and down, so that the upper mold 32 approaches or moves away from the lower mold directly below it. In this embodiment, the lifting mechanism is driven by a servo motor (denoted as the lifting servo motor).

[0050] The lower mold section 40 includes a lower mold frame 41, a lower mold 42, a lower mold flipping mechanism 43, multiple positioning pin mechanisms 44, and multiple edge binding mechanisms. Among them, the edge binding mechanisms include multiple PUR fabric center edge binding mechanisms 10, multiple corner edge binding mechanisms 20, and multiple edge edge binding mechanisms 60.

[0051] Among them, the lower mold frame 41 is a square box-shaped frame with an open upper part.

[0052] The lower mold 42 is located at the bottom inside the lower mold frame 41. The upper part of the lower mold 42 has a shape that matches another surface (main overlay surface) of the skeleton, including a contoured surface for cooperating with the upper mold 32 to overlay the skeleton and the skin. In this embodiment, corresponding to the shape of the skeleton, the contoured surface of the lower mold 42 is concave in shape, and the contoured surface also has relatively smooth protrusions, and the length and width of the lower mold 42 have a large difference.

[0053] The lower mold flipping mechanism 43 is used to flip the lower mold 42, the positioning pin mechanism 44, and all the edging mechanisms, so that the lower mold 42, the positioning pin mechanism, and the edging mechanisms are tilted relative to the horizontal plane, making it easier to place the skin. The lower mold flipping mechanism 43 mainly includes a mounting plate, a rotating shaft, and a flipping drive motor. The lower mold 42, the positioning pin mechanism 44, and the edging mechanisms are all fixed on the same surface of the mounting plate. The rotating shaft is located at one end of the length direction of the mounting plate and can drive the mounting plate to flip. The flipping drive motor is used to drive the rotating shaft to rotate. In this embodiment, the flipping angle of the mounting plate is 0° (i.e., the mounting plate is horizontal) to 45°.

[0054] Multiple positioning pin mechanisms 44 are distributed around the lower mold 42 to pre-position the skin before lamination and to tension the surface to a certain extent. Each positioning pin mechanism 44 includes a support member, a positioning pin, and a positioning pin cylinder (positioning pin lifting drive cylinder). One end of the support member is fixed to the mounting plate, and the other end is used to install the positioning pin, thereby adjusting the installation height of the positioning pin. The positioning pin is needle-shaped, vertically arranged with the tip pointing upwards. Its tip is spherical, and the diameter of the tip is slightly larger than the diameter of the needle body connected to the tip, so that it can pass through a pre-drilled hole on the edge of the skin to position and tension the skin. The positioning pin cylinder is used to drive the positioning pin to lift and lower. In this embodiment, a total of six positioning pin mechanisms 44 are provided, and their positioning pin cylinders are referred to as positioning pin cylinders 11-1 to 11-6.

[0055] Figure 3 This is a top view of the edge-binding mechanism in this embodiment. Figure 4 This is a top view of the edge-binding mechanism and the positioning pin mechanism in this embodiment. Figure 4 The image also shows the skeleton and skin surrounded by the edging mechanism and the positioning pin mechanism.

[0056] like Figure 3 and Figure 4 As shown, multiple binding mechanisms are arranged around the lower mold 42. In this embodiment, three PUR fabric center binding mechanisms 10 are arranged on each side of the lower mold 42 in the width direction, and the three PUR fabric center binding mechanisms 10 on each side are arranged closely in a straight line. Two conventional edge binding mechanisms 60 are also arranged on each side of the lower mold 42 in the width direction. Each edge binding mechanism 60 is arranged between two adjacent positioning pin mechanisms 44 and utilizes the space between two adjacent PUR fabric center binding mechanisms 10. A corner binding mechanism 20 is arranged next to each of the four corners of the lower mold 42, and the two corner binding mechanisms 20 on one side of the lower mold 42 in the length direction are also linked by a forward pushing mechanism 45, which can push the two corner binding mechanisms 20 toward the lower mold 42 a predetermined distance.

[0057] Figure 5 This is a perspective view of the PUR fabric center binding mechanism in use in this embodiment. Figure 6 This is a top view of the PUR fabric center binding mechanism in use in this embodiment. Figure 7 This is a cross-sectional view of the PUR fabric center binding mechanism in use in this embodiment. Figure 7 That is to say Figure 6 Cross-sectional view of section BB in the middle. Figures 5 to 7 In addition to the edging mechanism in the middle of the PUR fabric, the lower mold, the outer skin, and the skeleton (the skeleton is actually fixed to the upper mold) are also shown.

[0058] like Figures 5 to 7As shown, the skeleton 9 in this embodiment is the skeleton of the interior trim of the B-pillar. It is generally a thin plate bent along the width direction. The two sides of its width direction are the first edge portion 91 and the second edge portion 92 to be edged, respectively. The middle part is the main skeleton portion 93. Bends are formed between the first edge portion 91, the second edge portion 92 and the main skeleton portion 93. In the figure, the x, y and z axes are the length, width and height directions of the skeleton 9, respectively. The first edge portion 91 has a gradually changing height. One end of it is taller, and because a large concave part is formed on this side of the skeleton 9, the middle part of the first edge portion 91 has a large height difference. The first edge portion 91 is rolled towards the middle of the skeleton 9. That is, when the skeleton 9 is placed on the lower mold 42 as shown, the upper end of the first edge portion 91 is closer to the middle of the skeleton 9 than its lower end (the connection position with the main skeleton portion 93). From the side, the first edge portion 91 has a shape in which the upper end is inclined towards the middle of the skeleton 9. Similarly, the second edge portion 92 has a gradually changing width, with a larger height at one end, and along the y-axis direction, one end and the middle portion of the second edge portion 92 are rolled towards the middle of the skeleton 9, while the other end is rolled slightly outward.

[0059] One surface of the skeleton 9 is generally convex, which is the main bonding surface 9a, and the skin is mainly bonded to this surface; the other surface of the skeleton 9 is generally concave, which is the secondary bonding surface 9b, and the edge of the skin needs to be rolled up at the edge of the skeleton to the secondary bonding surface and bonded to the edge portion of the secondary bonding surface.

[0060] When the skeleton 9 is placed on the lower mold 42 as shown in the figure, that is, when the non-covered surface of the skeleton 9 is in contact with the lower mold 42, and the covered surface is facing upwards, the upper edges of the first edge 91 and the second edge 92 are closer to the center of the skeleton 9 than their lower edges (i.e., the connection position with the main board 93). When performing edge binding operations on such skeleton edges, conventional edge binding equipment first lifts the skin edge upwards a certain distance so that the skin edge is above the skeleton edge, then pushes the skin edge horizontally toward the center of the skeleton, and finally attaches the skin to the inner edge of the other surface of the skeleton. Therefore, the amount of stretching of the skin is relatively large. When the skin is PUR fabric, it will cause the above-mentioned texture disorder problem, and may even cause skin damage. The PUR fabric center edge binding mechanism 10 provided in this embodiment aims to solve this problem.

[0061] The PUR fabric center binding mechanism 10 is used to bind the edge of the PUR fabric covering the skeleton, wrapping the edge of the fabric to the center edge of the skeleton. The PUR fabric center binding mechanism 10 includes a mechanism support 11, a clamping assembly 12, a lifting assembly 13, a translation assembly 14, a diagonal guide assembly 15, and a cooling assembly.

[0062] The mechanism support 11 is roughly a square frame, fixed on the inner bottom surface of the lower mold frame 41, used to support other components and place the clamping assembly 12 at a predetermined height.

[0063] The clamping assembly 12 includes a clamping base 121, an edge-binding block 122, a clamping block 123, a clamping transmission component 124, a clamping guide component 125, and a clamping cylinder 126.

[0064] Figure 8 This is a perspective view of the clamping base in this embodiment.

[0065] like Figure 8 As shown, the clamping base 121 is in the shape of an irregular block and can be formed by combining multiple parts or by forming a single piece. The middle part of the clamping base 121 is shaped like a wedge, with the bottom dimension of the wedge being larger than the top dimension. There are two parallel support columns 1211 extending from one side of the bottom, and a connecting plate 1214 extending from the top. The support columns 1211 and the connecting plate 1214 extend in opposite directions.

[0066] The support columns 1211 are horizontally positioned. A mounting groove 1212, inclined relative to the support columns 1211, is formed between the two support columns 1211 at the center of the clamping base 121. A fixing plate portion 1215, approximately perpendicular to the extending direction of the mounting groove 1212, is formed within the mounting groove 1212. A circular through-hole 1215a is provided on the fixing plate portion 1215. Two inclined surfaces 1213 are formed on both sides of the mounting groove 1212 for mounting guide rails to guide the clamping. The inclined surfaces 1213 are inclined relative to the length direction of the support columns 1211, and the included angle between them is related to the stretching amount of the skin and the dimensions of the edge of the skeleton, with an angle of approximately 60° to 80°. After assembly, the support columns 1211 are essentially horizontal, thus the inclined surfaces 1213 are inclined at 60° to 80° relative to the horizontal direction.

[0067] The connecting plate 1214 is horizontally positioned and extends a considerable distance for connection with the lifting assembly 13.

[0068] Figure 9 This is a perspective view of the edge-binding block and the clamping block in this embodiment. Figure 10 This is a three-dimensional view of the edge-binding block in this embodiment.

[0069] like Figures 5 to 10As shown, the binding block 122 is an irregularly shaped part, comprising an integrally formed fixing part 1221, a first extension 1222, a second extension 1223, and a third extension 1224. The fixing part 1221 is generally rectangular in shape with a notch on one side, and has two mounting holes on both sides for fixing the binding block 122 to the two support columns 1211 of the clamping base 121. After installation, the surface of the fixing part 1221 is generally horizontal. The first extension 1222 extends from one edge of the fixing part 1221. One side of the first extension 1222 is generally parallel to the fixing part 1221, and the other side is slightly inclined downward relative to the fixing part 1221, and a long strip-shaped recess 12221 is formed on the other side. Depending on the shape of the corresponding skeleton edge portion, the binding block 122 may also have other shapes of recesses, or no recesses, or other curved shapes.

[0070] Viewed from the side, the outer end of the binding block 122 is roughly Z-shaped, and its outer end has a curved shape that matches the edge of the corresponding side of the skeleton.

[0071] In addition, such as Figure 10 As shown, the second extension 1223 of the binding block 122 is wedge-shaped and elongated. At the connection point with the third extension 1224, a protruding portion is formed that protrudes away from the lower mold 42, thereby forming an inclined binding slope 1223a on the back of the second extension 1223. The bottom surface of the third extension 1224 is the binding bottom surface 1224a connected to the binding slope 1223a. The shape and inclination angle of the binding slope 1223a match the edge portion of the secondary mating surface 9b (concave surface) of the skeleton; the shape of the binding bottom surface 1224a matches the edge end face of the skeleton.

[0072] The clamping block 123 is also an irregularly shaped part, comprising a fixing part 1231 and a clamping head 1232. The fixing part 1231 is rectangular plate-shaped with multiple mounting holes for fixing the clamping block 123 to one end of the clamping transmission member 124. The clamping head 1232 is plate-shaped, extending from one side of the fixing part 1231. The angle between the clamping head 1232 and the fixing part 1231 is an obtuse angle close to a right angle, and the width of one side of the clamping head 1232 is greater than that of the other side, i.e., it is roughly trapezoidal plate-shaped. The edge of the clamping head 1232 has a curved shape that matches the edge of the edge-binding block 122. The outer edge of the clamping head 1232 has multiple triangular teeth 1234 arranged in sequence. Depending on the shape of the corresponding skeleton edge portion, the clamping head 1232 of the clamping block 123 can also have other shapes, such as a uniform width or other curved shapes.

[0073] Viewed from the side, the clamping block 123 is generally L-shaped with an obtuse angle. Its outer end is straight and tilted outward, and its outer end also has a curved shape that matches the edge of the corresponding side of the skeleton, and matches the shape of the edge-binding block 122 in the same mechanism. The clamping block 123 and the edge-binding block 122 cooperate to clamp the edge of the skin, and when clamping, a triangular through hole is formed between the two adjacent triangular teeth 1234 of the clamping block 123 and the upper surface of the skin, allowing the light from the heating lamp to pass through and shine on the clamped edge of the skin.

[0074] Figure 11 yes Figure 1 Enlarged view of the inner part of frame A.

[0075] like Figure 11 As shown, the three binding blocks 122 of the three PUR fabric binding mechanisms 10 on the same side are arranged closely in sequence. The outer edges of the three binding blocks 122 form a continuous arc shape, corresponding to the shape of the skeleton edge on the corresponding side. The three clamping blocks 123 are the same. The width of the outer edge of the binding block 122 and the clamping block 123 is greater than the width of the other parts, so that their outer edges can be connected sequentially.

[0076] Figure 12 yes Figure 1 Enlarged view of the inner part of frame B.

[0077] like Figure 12 As shown, the outer end of the binding block 122 has a clearance notch 1225 and a clearance groove 1226 communicating with the notch. The clearance notch 1225 is formed on the third extension 1224 and is approximately a horizontal rectangular notch. The clearance groove 1226 is formed on the second extension 1223 and is a groove with an arc-shaped bottom surface. Its extension direction is the same as that of the second extension 1223, that is, approximately vertical. The outer end of the clamping block 123 also has a clearance notch 1233 that matches the clearance notch on the binding block 122. The clearance notch 1233 is formed on the clamping head 1232 and is approximately an inclined elongated notch. Its position and width correspond to the position and width of the clearance groove 1226, respectively, and its width is greater than the diameter of the positioning pin 441. These clearance notches and clearance grooves are used to make way for the positioning pin 441, so that the skin edge, which is positioned and tensioned by multiple positioning pins, can be clamped without interfering with the positioning pins.

[0078] Furthermore, in this embodiment, the edge-binding block 122 is made of H62 brass. The surface of the clamping block 123 is plated with black Teflon material, which can prevent or reduce glue adhesion to the clamping block 123, and this material has high temperature resistance and can maintain stable performance during heating.

[0079] The clamping transmission component 124 includes a Y-type adapter 1241, a rotating shaft, a T-type connector 1242, and an L-type connector 1243. One end of the Y-type adapter 1241 is fixed to the piston rod end of the clamping cylinder 126, and the other end has a pair of mounting holes for mounting the rotating shaft. One end (lower T-shaped end) of the T-type connector 1242 is rotatably connected to the rotating shaft and is located between the pair of mounting holes of the Y-type connector 1241. The other end (upper T-shaped end) of the T-type connector 1242 is fixed to the upper end of the L-type connector 1243. The L-type connector 1243 is obtuse-angled L-shaped when viewed from the side, and the clamping block 123 is fixed to the lower surface of the other end of the L-type connector 1243.

[0080] The clamping guide component 125 guides the movement of the clamping block 123 and includes two linear guide rails 1251 and two sliders 1252. The guide rails 1251 are fixed to the inclined surface 1213 and are inclined in the same direction as the inclined surface 1213. The sliders 1252 are slidably mounted on the guide rails 1251. Two L-shaped connectors 1243 are fixed to the two sliders 1252 on their respective sides, and a T-shaped connector 1242 is located between the two sliders 1252.

[0081] The clamping cylinder 126 (clamping drive cylinder) is installed in the mounting groove 1212 of the clamping base 121 and passes through the mounting hole on the horizontal plate-shaped portion. The piston rod of the cylinder faces upward and has the same inclination angle as the guide rail 1251. It is used to drive the clamping block 123 to move towards the edge binding block 122 or in the opposite direction, thereby clamping or releasing the edge of the fabric. For ease of description, the clamping cylinders of the three PUR fabric center edge binding mechanisms 10 on one side are referred to as clamping cylinders 2-1 to 2-3, and the clamping cylinders of the three PUR fabric center edge binding mechanisms 10 on the other side are referred to as clamping cylinders 6-1 to 6-3.

[0082] The lifting assembly 13 is used to drive the clamping assembly 12 to move up and down as a whole. The lifting assembly 13 includes a lifting bracket 131, a first lifting cylinder 132 (lifting drive cylinder), a second lifting cylinder 133, and a lifting guide component 134.

[0083] The lifting support 131 is roughly L-shaped and can be composed of multiple parts or formed as a single unit, including a base plate 1311 and a vertical plate 1312.

[0084] The first lifting cylinder 132 and the second lifting cylinder 133 are arranged opposite to each other, with their bottom surfaces fixed together. Their piston rods are vertically upward and downward, respectively, and are approximately coaxial. The first lifting cylinder 132 is located above, with its piston rod pointing upward and fixed to the connecting plate 1214. The second lifting cylinder 133 is located below, with its piston rod pointing downward and fixed to the base plate 1311. The piston rod of the second lifting cylinder 133 is longer than that of the first lifting cylinder 132. These two lifting cylinders combine to form a lifting drive component, which can provide four different lifting heights for the clamping assembly 12, in ascending order of height: (1) both piston rods of the lifting cylinders are retracted; (2) the piston rod of the first lifting cylinder 132 is extended and the piston rod of the second lifting cylinder 133 is retracted; (3) the piston rod of the first lifting cylinder 132 is retracted and the piston rod of the second lifting cylinder 133 is extended; (4) both piston rods of the lifting cylinders are extended.

[0085] In this embodiment, in case (2), the height of the clamping component 12 is the edge-wrapping height. In case (3), the height of the clamping component 12 is the edge-wrapping height, at which time the outer edge of the edge-wrapping block 122 is flush with the edge of the skeleton. In case (4), the clamping component 12 is at the maximum stretching height, at which time the outer edge of the edge-wrapping block 122 is located above the edge of the skeleton, and the height difference between the two is less than or equal to 10mm.

[0086] For ease of description, the first lifting cylinders of the three PUR fabric middle binding mechanisms 10 on one side are respectively referred to as first lifting cylinders 3-1 to 3-3, and the second lifting cylinders are respectively referred to as second lifting cylinders 4-1 to 4-3; the first lifting cylinders of the three PUR fabric middle binding mechanisms 10 on the other side are respectively referred to as first lifting cylinders 7-1 to 7-3, and the second lifting cylinders are respectively referred to as second lifting cylinders 8-1 to 8-3.

[0087] The lifting guide component 134 is used to guide the lifting of the clamping assembly 12. It includes multiple linear guide rails 1341 and multiple sliders 1342, two of which are used in this embodiment. The two sliders 1342 are fixed to one side of the upright plate 1312. The grooves on the sliders 1342 extend vertically, and the sliders 1342 and the two lifting cylinders are located on both sides of the upright plate 1312. The two guide rails 1341 are fixed to one side of the clamping base 121 and located below the connecting plate 1214. The guide rails 1341 and the sliders 1342 are slidably engaged to achieve lifting guidance.

[0088] The translation component 14 is used to drive the lifting component 13 and the clamping component 12 to translate as a whole. The translation component 14 includes a translation guide component 141, a translation servo motor 142, a lead screw 143, a synchronous belt (not shown in the figure), and a synchronous pulley 145.

[0089] The translation guide component 141 includes multiple linear guide rails 1411 and multiple sliders 1412. The multiple guide rails 1411 are fixed parallel to each other on the upper surface of the mechanism support 11. The sliders 1412 are slidably fitted onto the guide rails 1411 and are fixed on the lower surface of the base plate 1311 of the lifting support 131.

[0090] A corresponding nut seat is provided on the lead screw 143, which is also fixed to the lower surface of the base plate 1311. The servo motor 142 is used to drive the lead screw 143, thereby driving the lifting assembly 13 and the clamping assembly 12 to move as a whole.

[0091] The synchronous belt and synchronous pulley 145 are used to realize the transmission between the servo electrode 142 and the lead screw 143, thereby enabling the overall size of the PUR fabric center binding mechanism 10 to be miniaturized. One synchronous pulley 145 is mounted on the output rod of the servo motor 142, and the other synchronous pulley 145 is mounted on one end of the lead screw 143, with the two synchronous pulleys 145 roughly aligned in the same vertical direction. The synchronous belt is fitted onto these two synchronous pulleys 145, allowing the servo motor 142 to drive the lead screw 143 to rotate via the synchronous belt structure.

[0092] The oblique retraction guide assembly 15 is used to guide the movement of the clamping assembly 12 during descent and retraction (relative to the lower die), enabling the clamping assembly 12 to retract obliquely backward. The oblique retraction guide assembly 15 includes a pair of oblique retraction guides 151, a pair of guide wheels 152 (rollers), and their guide wheel supports 153.

[0093] The oblique guide 151 is an L-shaped component with an obtuse angle, which includes a first part and a second part, with a bend between them. Both parts are roughly elongated blocks. One side of the second part is fixed to the upper surface of the mechanism support 11. The first part extends upward at an inclination toward the lower mold 42 and has an inclination elongated guide surface 1511a facing away from the lower mold 42.

[0094] Two guide wheel brackets 152 are respectively installed on the lower parts of opposite sides of the clamping base 121 and extend to the bottom of the clamping base 121. The two guide wheels 152 are rotatably installed on the lower ends of the two rolling brackets 1433, and the positions of the two guide wheels 152 correspond to the two inclined push guides 151 respectively.

[0095] The cooling assembly includes flow channels formed in the edging block 122 and pipes communicating with the flow channels. The flow channels and pipes are used to circulate coolant, such as cooling water, to cool the skin. The inlet and outlet of the flow channels on the edging block 122 are located on its side. In addition, in this embodiment, similar flow channels are also formed in the lower mold 42.

[0096] The corner binding mechanism 20 can adopt a corresponding structure in the prior art. In this embodiment, it includes a corner binding block and a front push cylinder (front push drive cylinder). The shape of the corner binding block matches the shape of the corner of the skeleton. The front push cylinders of the four corner binding mechanisms 20 are respectively referred to as front push cylinders 5-1 to 5-4. In addition, the two corner binding mechanisms 20 on one side are linked by a front push mechanism 45. The front push mechanism 45 includes a connecting plate and front push cylinders 10-1, 9-1, and 9-2. The front push cylinder 10-1 is used to push the two corner binding mechanisms 20 together towards the lower mold 42 a certain distance. The front push cylinders 9-1 and 9-2 are respectively used to push the two corner binding mechanisms 20 towards the lower mold 42 a certain distance. The pushing distances of the two are different. The front push cylinders of the two corner binding mechanisms 20 push their corner binding blocks obliquely towards the corner of the skeleton.

[0097] The edge-sealing mechanism 60 can also adopt a corresponding structure in the prior art. In this embodiment, it includes an edge-sealing block and a front-push cylinder. The edge-sealing block is elongated and its shape matches the edge shape of the skeleton. The height of the edge-sealing block is lower than the height of the edge-sealing block 122. The front-push cylinders of the four edge-sealing mechanisms 60 are respectively referred to as front-push cylinders 12-1 to 12-4.

[0098] The heated transplanting unit 50 includes a transplanting frame 51, a heating lamp tube 52, a translation mechanism 53, and a transplanting motor 54 (translation drive motor).

[0099] Among them, the transplanting frame 51 is a square box-shaped frame with an open top.

[0100] Heating lamps 52 are used to heat the skeleton and the skin to activate the adhesive on one surface of the skin, allowing the skin to better adhere to the skeleton. Multiple heating lamps 52 are fixed in the transfer frame 51 by corresponding brackets. In this embodiment, corresponding to the shape of the skeleton, the multiple heating lamps 52 are arranged approximately parallel to each other and are arranged in a curved shape corresponding to the shape of the skeleton surface.

[0101] The translation mechanism 53 includes guide rails, sliders, gears and racks, etc., which is a conventional translation mechanism structure, so it will not be described in detail. The transfer frame 51 is installed on the lower mold frame 41 through the translation mechanism 53 and can move horizontally relative to the lower mold frame 41, thereby driving multiple heating lamps 52 to move between the upper mold 32 and the lower mold 42 and to one side, so as not to block the lower mold 42.

[0102] The transfer drive motor 54 is used to drive the gear to rotate, thereby driving the transfer frame 51 and the heating lamp tube 52 to move as a whole through the meshing gear rack.

[0103] In addition, such as Figure 1As shown, the lower mold frame 41 can be divided into two parallel parts of similar size. One part is equipped with the lower mold 42, the edging mechanism, etc., while the other part is empty. Alternatively, another set of lower mold 42, lower mold flipping mechanism 43, positioning pin mechanism 44, and edging mechanism can be installed in the empty part. The two sets of structures are mirror-symmetrical. Correspondingly, two upper mold parts 30 are also provided, and the two upper mold parts 30 can share a lifting mechanism. In the heating and transfer part 50, a set of heating lamps 52 can also be provided on the other side, so that the automotive interior edging device 100 can simultaneously process two mirror-symmetrical B-pillar center interior parts. Since two mirror-symmetrical B-pillar center interior parts are needed in a car, this arrangement is very advantageous.

[0104] In addition, multiple sensors are installed at the upper mold 32 and the lower mold 42 respectively to detect the status of the workpiece or mechanism. The automotive interior trim edging device 100 is equipped with a corresponding control device, which can automatically control each mechanism according to the sensor signals. The control device includes a start button for workers to start the automatic overlay and trimming process.

[0105] Before processing begins, the lower mold 42, the positioning pin mechanism 43, and the edge-binding mechanism are all tilted. The worker places the skeleton onto the upper mold 31, where sensors detect it. The control device then controls multiple clamping mechanisms 33 on the upper mold 30 to hold the skeleton in place. The worker places the outer skin above the lower mold 42 and hooks its edges onto the positioning pins. Sensors on the lower mold 42 detect the outer skin. Then, the worker presses the start button to initiate the automatic bonding and edge-binding process.

[0106] After startup, the lower mold flipping mechanism 43 flips the lower mold 42 and its surrounding positioning pin mechanism 44, edge binding mechanism, etc., to a horizontal position, such as... Figure 1 As shown in the diagram. Then, the transplanting motor 54 drives the transplanting frame 51 and the heating lamp 52 to move between the upper mold 32 and the lower mold 42, and the upper mold 32 slightly presses down on the frame, while the heating lamp 52 heats the frame and the outer skin. After heating is completed, the upper mold 32 resets, and the heated transplanting part 50 resets. Then, after the multiple PUR fabric edge-wrapping mechanisms 10 clamp the edges of both sides of the outer skin, the upper mold 32 presses down toward the lower mold 42 to cover the frame and the outer skin, and then the multiple edge-wrapping mechanisms perform the edge-wrapping. After the edge-wrapping and wrapping are completed, the device resets and outputs the processed B-pillar interior trim.

[0107] The following will describe in detail the process by which the PUR fabric center binding mechanism 10 wraps the skin edge to the center of the skeleton edge during the above-mentioned binding process. The binding process of other binding mechanisms is basically the same as that in the prior art, and will not be described in detail here.

[0108] Figure 13This is a schematic diagram of the edge-wrapping process in this embodiment. Figure 1 .

[0109] like Figure 13 As shown, before the upper mold 32 begins to press down or before it reaches its final position, the skin 8 is located between the upper mold 32 and the lower mold 42 and is tensioned by multiple positioning pins. The lifting assembly 13 positions the clamping assembly 12 at its maximum tension height (approximately 10 mm). Then, the clamping cylinder 126 drives the clamping block 123 to press against the edge-binding block 122, causing the clamping assembly 12 to clamp the skin edge 81. Then, the translation servo motor 142 drives the clamping assembly 12 to retract (relative to the lower mold 42, the same below) to a predetermined pull-back position, thereby tensioning the skin 8 through the multiple clamping assemblies 12 on both sides. At this time, the positioning pin cylinder can drive the positioning pin to move down, allowing the positioning pin to disengage from the skin.

[0110] Figure 14 This is a schematic diagram of the edge-wrapping process in this embodiment. Figure 2 .

[0111] like Figure 14 As shown, during the downward pressing of the upper mold 32, the translational servo motor 142 drives the clamping assembly 12 to advance to the predetermined edge-binding position. At this time, the height difference between the skin edge and the skeleton edge is still about 10mm. Then, the front push cylinders of each corner edge-binding mechanism 20 and the edge edge-binding mechanism 60 drive their corner edge-binding blocks and edge edge-binding blocks to press the skin tightly against the corner edge of the skeleton (slightly below the edge).

[0112] Figure 15 This is a schematic diagram of the edge-wrapping process in this embodiment. Figure 3 .

[0113] like Figure 15 As shown, after the skin edge is placed in the above position, the clamping cylinder 126 drives the clamping block 123 to move in the opposite direction, causing the clamping assembly 12 to release the skin edge 81. At this time, the skin edge 81 rests on the outer end (third extension 1224) of the edge-binding block 122.

[0114] Figure 16 This is a schematic diagram of the edge-wrapping process in this embodiment. Figure 4 .

[0115] like Figure 16As shown, after the clamping assembly 12 releases the skin edge, the lifting assembly 13 lowers the clamping assembly 12 to the height to be edged (approximately flush with the edge of the skeleton). Then, the servo motor 142 drives the clamping assembly 12 forward to a predetermined edge-binding lowering position, which is closer to the center of the skeleton than the edge of the skeleton. This causes the edge-binding block 122 to push the skin edge, rolling the skin edge to the other side of the skeleton edge (i.e., rolling the skin edge to the edge of the secondary bonding surface 9b of the skeleton 9). The bottom edge-binding surface 1224a of the edge-binding block 122 contacts the non-bonding surface of the skin 8, pressing the skin edge 81 against the upper edge of the skeleton. At this time, the guide wheel 1432 is approximately in contact with the upper end of the guide surface 14311a of the inclined push guide 1431.

[0116] Figure 17 This is a schematic diagram of the edge-wrapping process in this embodiment. Figure 6 ; Figure 18 yes Figure 17 A magnified view of the area inside frame C. Figure 18 The image shows the shape of the skeleton edge and the skin edge after the edging is completed.

[0117] like Figure 17 and Figure 18 As shown, after the skin edge 81 is rolled over to the other side of the frame edge, the lifting assembly 13 drives the clamping assembly 12 to descend to the edging position height. During descent, the guide wheel 152 rolls downward along the inclined guide surface 1511a, which serves as a guide. At the same time, the translation servo motor 142 moves accordingly, causing the clamping assembly 12 to retract in an inclined backward direction. The edging inclined surface 1223a of the edging block 122 presses the skin edge 81 inclined downward against the edge of the secondary bonding surface 9b of the frame 9, thereby completing the edging operation with a small amount of stretching of the skin 8.

[0118] The role and effect of the embodiments

[0119] According to the PUR fabric center binding mechanism and automotive interior binding device provided in this embodiment, which are located next to the lower mold, a clamping component, a lifting component, a translation component, and a diagonal guide component are included. Therefore, the clamping component can clamp the edge of the skin to be bound, and the lifting and translation components can drive the clamping component to lift and translate, thereby wrapping the clamped skin onto the corresponding frame. The skin edge can be extended upward and pushed forward, so that the skin edge can be rolled over from one surface of the frame to the edge of another surface, and wrapped around the frame edge. In addition, due to the diagonal guide component, it can guide the clamping component when it descends and retracts, so that the clamping component, with the clamped skin edge, retracts backward relative to the lower mold in a diagonal downward direction. This allows the skin to be rolled over to another surface of the frame and then attached to the frame edge in this direction. Thus, the binding of the surface of the PUR fabric onto the frame edge can be achieved with a small amount of stretching of the PUR fabric skin, so that the PUR fabric skin can be well attached to the frame surface without texture disorder, skin tearing or damage.

[0120] In this embodiment, the translation component is driven by a servo motor, and the inclined retraction guide component includes a pair of inclined retraction guide members and a pair of guide wheels. The inclined retraction guide members have an inclined downward slope facing away from the mold. The guide wheels can roll along the slope. Therefore, when the lifting component drives the clamping component to descend, the pair of guide wheels can be guided by rolling along the guide surface. At the same time, the servo motor can follow the movement, so that the clamping component can drive the clamped skin to retract in an inclined downward direction, thereby achieving edge wrapping while reducing the stretch of the skin.

[0121] Furthermore, the clamping assembly includes an edge-binding block and a clamping block. The outer end of the edge-binding block is Z-shaped, and the outer end of the clamping block is an obtuse-angled L-shaped that matches the outer end of the edge-binding block. Both edges have curved shapes that match the edges of the skeleton. Multiple edge-binding blocks and clamping blocks on each side of the device are arranged closely in sequence, and their outer edges are connected in sequence to form a curve that matches the edges of the skeleton. Therefore, it can not only clamp the skin well, making it less prone to slippage during the edge-binding process, but also better perform edge-binding operations on skeletons with specific edge shapes, resulting in a better appearance of the interior trim after edge-binding.

[0122] Furthermore, the outer edge of the clamping block has multiple triangular teeth (inverted triangular teeth) arranged in sequence. Therefore, after clamping the skin, multiple triangular through holes can be formed between two adjacent triangular teeth and the upper surface of the skin. These through holes allow the light from the heating lamp to pass through and shine on the edge of the clamped skin, thereby better activating the adhesive at the edge and making the bonding and edging effect at the edge of the skin better.

[0123] Furthermore, the outer end of the binding block has a special shape, forming a connected binding bottom surface and binding bevel, which respectively match the upper end surface of the skeleton and the inner edge of the skeleton. Therefore, the clamping assembly can not only clamp the skin edge and stretch it above the skeleton edge, but also achieve binding through these specially shaped binding blocks, further pushing the skin to roll up to the other side of the skeleton edge. During this process, the skin is well attached to the upper end surface of the skeleton through its binding bottom surface, and during the subsequent retraction, the skin is well attached to the inner edge of the skeleton through its binding bevel. That is, a composite function is achieved through a simplified structure, which is conducive to the miniaturization of the mechanism and device while meeting functional requirements.

[0124] Furthermore, the edge-sealing block is made of brass and has internal channels for the flow of coolant. Similar channels are also provided in the lower mold. Therefore, the edge-sealing block will not deform or deteriorate when exposed to heating lamps, and can stably clamp the skin. After the edge-sealing is completed, the internal channels can be used to cool the skin and the frame, thereby improving the production cycle.

[0125] Furthermore, the surface of the clamping block is coated with Teflon material, which has excellent thermal stability and will not deform or deteriorate when exposed to heating lamps. It can stably clamp the skin, and the material does not easily adhere to glue. Combined with the triangular tooth design at the outer end of the clamping block, it can minimize the adhesion and removal of glue from the skin, and also avoid the need to carefully clean the glue on the clamping block after each use. This makes the mechanism and device more convenient to use and more efficient in production.

[0126] Furthermore, the lifting assembly includes two lifting cylinders stacked opposite each other, with their piston rods facing upwards and downwards respectively and having different piston rod lengths (strokes). Therefore, the action of these two lifting cylinders can provide four different heights. In this embodiment, three of these heights are used as the edge-wrapping height, the edge-wrapping height, and the maximum stretching height, respectively. This allows for precise multi-height adjustment control with a very simple and concise mechanical structure, without the need for complex software control.

[0127] Furthermore, the maximum stretching height is less than or equal to 10mm between the edge of the epidermis and the top of the skeleton, which can further prevent the epidermis from being overstretched.

[0128] Furthermore, in the translation assembly, the lead screw is positioned above the servo motor and connected to it via a synchronous belt structure, thereby reducing the footprint of the binding mechanism in the middle of the PUR fabric. Since a large number of binding mechanisms need to be set around the lower mold, and the space available for each binding mechanism is very limited, this design is very advantageous, as it can utilize limited space to arrange more binding mechanisms, thereby improving the precision of the binding.

[0129] Furthermore, in the automotive interior trim edging device, two sets of upper molds, lower molds, edging mechanisms, and heating lamp groups can be set up in a mirror-symmetrical manner. The two sets can share the upper mold lifting mechanism, heating and transfer mechanism, etc., so that two automotive interior parts that are mirror-symmetrical can be automatically processed at the same time. Since many automotive interior parts require two mirror-symmetrical parts in a car, this setting is very advantageous, as it can improve the production efficiency of automotive interior parts and better ensure the consistency of a pair of automotive interior parts in a car, making the interior space of the car look better.

[0130] The above embodiments are merely illustrative of specific implementations of the present invention, and the present invention is not limited to the scope of the description of the above embodiments. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only for illustrating the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PUR fabric center binding mechanism, disposed in an automotive interior binding device and located next to the lower mold, for binding the center of the edge between the outer skin and the skeleton of the PUR fabric, characterized in that, include: A clamping assembly for clamping the edge of the skin; A lifting assembly is used to drive the clamping assembly to move up and down; A translation component is used to drive the clamping component to translate, so that it moves forward toward the lower mold or moves backward in the opposite direction; as well as The inclined guide assembly is used to guide the clamping assembly as it descends and retracts, so that the clamping assembly retracts relative to the lower die in an inclined downward direction.

2. The PUR fabric center binding mechanism according to claim 1, characterized in that: in, The clamping assembly includes a base, an edge-binding block disposed on the base, and a clamping block movably disposed on the base. The clamping block cooperates with the edge-binding block to clamp the edge of the skin. The translation component includes a servo motor for driving the base to translate. The inclined guide assembly includes a pair of inclined guide members and a pair of guide wheels. The inclined retraction guide has an elongated guide surface facing away from the lower mold, and extends obliquely downwards along the retraction direction. A pair of guide wheels are rotatably mounted on both sides below the base via corresponding brackets, for rolling along the guide surfaces on the corresponding sides during retraction, thereby causing the clamping assembly to retract in a downward oblique direction.

3. The PUR fabric center binding mechanism according to claim 2, characterized in that: in, The translation assembly also includes a lead screw, a nut seat mounted on the lead screw, a timing pulley, and a timing belt. The nut seat is fixed to the bottom of the base. The lead screw is positioned above the servo motor and is connected to the output shaft of the servo motor via the synchronous pulley and the synchronous belt.

4. The PUR fabric center binding mechanism according to claim 2, characterized in that: in, The clamping assembly also includes a clamping guide component and a clamping cylinder. The base has a wedge-shaped block in the middle with a mounting groove, a supporting arm extending from one side of the lower part, and a connecting plate extending from one side of the upper part. The edge-binding block is fixed to the support arm. The clamping block is tilted and movable relative to the lower die above the edge-binding block via the clamping guide component. The clamping cylinder is disposed in the mounting groove, and its piston rod is inclined upward and connected to the clamping block through a transmission component.

5. The PUR fabric center binding mechanism according to claim 4, characterized in that: in, The edging block has an edging bottom surface and an edging bevel surface connected to the edging bottom surface. The shape and inclination angle of the edge-wrapping bevel match the inner edge of the skeleton, and are used to cover the edge of the skin onto the inner edge of the skeleton when the clamping assembly retracts in a direction obliquely downward relative to the lower mold.

6. The PUR fabric center binding mechanism according to claim 4, characterized in that: in, The lifting assembly includes a lifting bracket, a first lifting cylinder, and a second lifting cylinder. The first lifting cylinder and the second lifting cylinder are stacked opposite each other, with their piston rods pointing upwards and downwards, respectively. The piston rod of the first lifting cylinder faces upward and is fixed to the connecting plate. The piston rod of the second lifting cylinder faces downward and is fixed to the lifting bracket. The piston rod of the second lifting cylinder is longer than that of the first lifting cylinder. When the piston rod of the first lifting cylinder extends and the piston rod of the second lifting cylinder retracts, the height of the clamping assembly is the predetermined edge-wrapping positioning height. When the piston rod of the first lifting cylinder retracts and the piston rod of the second lifting cylinder extends, the height of the clamping assembly is the predetermined height to be edge-wrapped. When the piston rods of both the first and second lifting cylinders are extended, the height of the clamping assembly is the predetermined maximum tension height. Relative to the skeleton placed on the lower mold, the edge-sealing height is lower than the edge of the skeleton, the edge-sealing height is flush with the edge of the skeleton, and the maximum stretching height is higher than the edge of the skeleton with a height difference of less than or equal to 10mm.

7. The PUR fabric center binding mechanism according to claim 4, characterized in that: in, The outer end of the edging block is Z-shaped and has a curved shape that matches the edge of the skeleton. The edging block is made of brass. The outer end of the clamping block is in the shape of an obtuse L-shaped edge that matches the outer end of the edge-binding block, and the surface of the clamping block is coated with Teflon material.

8. The PUR fabric center binding mechanism according to claim 7, characterized in that: in, The automotive interior trim edging device uses heating lamps to heat the adhesive-coated skin and the frame. The outer edge of the clamping block has a plurality of triangular teeth arranged in sequence. When the clamping block and the edge-binding block cooperate to clamp the edge of the skin, a triangular through hole is formed between two adjacent triangular teeth and the surface of the skin, which is used to allow the light of the heating lamp to pass through.

9. The PUR fabric center binding mechanism according to claim 2, characterized in that: in, The edge-sealing block is provided with flow channels for coolant circulation. The inlet and outlet of the flow channel are located on the side of the edge block.

10. A car interior trim edging device, characterized in that, include: The upper mold is used to hold the skeleton. The lower mold is used to cooperate with the upper mold to cover the skin onto the skeleton; as well as Multiple edging mechanisms are used to wrap the edges of the skin onto the skeleton. Among them, the plurality of edging mechanisms include at least one PUR fabric center edging mechanism for edging the center edge of the skeleton. The PUR fabric center binding mechanism is the PUR fabric center binding mechanism as described in any one of claims 1-9.

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