Orthopedic mechanism for weakening line area in infrared welding tire membrane

Abstract

The utility model discloses an infrared welding tire mold inner weakening line area shape righting mechanism which comprises an upper mold bottom plate, an air bag frame frame fixing module is fixed on the upper mold bottom plate, and an air bag frame door fixing module is arranged in an area defined by the air bag frame frame fixing module. The air bag frame door fixing module is fixed to the upper die bottom plate, and a weakening groove is formed in the air bag frame door fixing module in the trend of a weakening line of a plastic part. The floating pressing block is arranged in the weakening groove in the trend of the weakening line, an elastic lifting component is arranged between the floating pressing block and the upper die bottom plate, in the infrared welding process, the floating pressing block can be pressed downwards in a self-adaptive mode through the elastic lifting component, and the floating pressing block can be attached to the weakening line area in the middle of the plastic part and apply pressure to the weakening line area. According to the utility model, accurate pressure application and shape correction of the weakening line area of the plastic part are realized, and the problem of surface concave deformation of the plastic part caused by the weakening line and expansion caused by heat and contraction caused by cold is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automotive interior processing technology, specifically relates to a kind of infrared welding tire membrane inside weakening line area orthopaedic mechanism. BACKGROUND

[0002] In the infrared welding process of automotive interior parts, the traditional infrared welding tire mold only implements compression operation in the mutual bonding area of two plastic parts, to complete the core functions such as fixing the plastic parts to be welded, welding pressure and pressure cooling. For the part without plastic part bonding in the infrared welding heating area, the technical difficulty of adding compression mechanism is high due to the small size of the area, and when the product appearance requirement is low, the plastic part shrinkage deformation can be reduced through process debugging to meet the basic needs, so the traditional tire mold usually does not set compression mechanism.

[0003] As shown in Figure 1 , take the infrared welding air bag frame product as an example, the existing infrared welding air bag frame tire membrane includes an upper die bottom plate (1), a air bag frame frame fixing module (2) is fixed on the upper die bottom plate (1), and a air bag frame door fixing module (3) is arranged in the area surrounded by the air bag frame frame fixing module. The air bag frame door fixing module (3) is fixed on the upper die bottom plate (1), and a weakening groove (3.1) is arranged along the weakening line of the plastic part. In practical application, the welded air bag frame area is provided with a weakening line for weakening the local mechanical properties of the plastic part to create conditions for the safety air bag to pop out. However, the existing tire membrane continues the defects of the traditional tire mold, and does not set compression and orthopaedic structure for the area where the weakening line is located. The mechanical property decline caused by the weakening line, combined with the thermal expansion and contraction effect of the plastic part after infrared welding, aggravates the concave marks on the surface of the plastic part. The leather covering of automotive interior parts for improving appearance makes the concave marks more obvious, resulting in many automotive instrument panels on the market with clear weakening line marks. Therefore, it is urgent to develop an effective compression and orthopaedic mechanism for the weakening line area in the infrared welding tire membrane. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies in the prior art, the utility model provides an infrared welding tire membrane inside weakening line area orthopaedic mechanism.

[0005] The utility model discloses an infrared welding tire membrane inside weakening line area orthopaedic mechanism, including upper die bottom plate, its upper fixed air bag frame frame fixing module, air bag frame door fixing module is established in the area surrounded by air bag frame frame fixing module, air bag frame door fixing module is fixed on the upper die bottom plate, and its along plastic part weakening line trend is equipped with weakening groove, its characterized in that, still include: floating pressing block,

[0006] The floating pressing block is arranged in the weakening groove along the weakening line, and an elastic lifting component is arranged between the floating pressing block and the upper die bottom plate; in the infrared welding process, the floating pressing block can be adaptively pressed down through the elastic lifting component, and the floating pressing block can be attached to the middle weakening line area of the plastic part and can apply pressure to the weakening line area.

[0007] As a further improvement of the utility model, the elastic lifting component comprises a lower floating plate, a guide rail and an elastic pre-pressing adjusting part.

[0008] The lower part of the lower floating plate is fixed with the floating pressing block, and the both ends of the lower floating plate are respectively provided with guide plates in the vertical upward direction.

[0009] The upper part of the lower floating plate is elastically connected with the upper die bottom plate through the elastic pre-pressing adjusting part, and the elastic pre-pressing adjusting part provides elastic support force for the upward movement or downward movement of the lower floating plate.

[0010] As a further improvement of the utility model, the elastic pre-pressing adjusting part comprises a guide rod, a pre-pressing adjusting nut and a spring.

[0011] The upper part of the lower floating plate is fixed with the floating pressing block, and the both ends of the lower floating plate are respectively provided with guide plates in the vertical upward direction.

[0012] As a further improvement of the utility model, under the pre-pressing force of the spring, the lower end surface of the floating pressing block is 2-3mm higher than the welding surface of the upper plastic part to be welded.

[0013] As a further improvement of the utility model, the upper limiting part and the lower limiting part are further included.

[0014] The both ends of the guide plate extend horizontally to both sides along the direction perpendicular to the lifting direction of the guide rail, and the upper die bottom plate is provided with the upper limiting part above the side convex part of the guide plate and is provided with the lower limiting part below the other side convex part of the guide plate.

[0015] As a further improvement of the utility model, the upper limiting piece comprises an L-shaped support; a horizontal section of the L-shaped support is fixedly installed on the upper die base plate, and a vertical section of the L-shaped support is arranged above the convex portion.

[0016] When the floating pressing block is returned to position, the upper end surface of the convex portion of the guide plate abuts against the lower end surface of the vertical section of the L-shaped support.

[0017] As a further improvement of the utility model, the lower limiting piece comprises a fixed block and a floating distance adjusting screw:

[0018] The upper die base plate is provided with an air bag door fixing module base at both ends of the air bag door fixing module correspondingly, the upper end of the air bag door fixing module base is fixed on the upper die base plate, and the lower end supports the air bag door fixing module; the fixed block is fixed on the air bag door fixing module base, a floating distance adjusting screw is screwed in the vertical direction on the top of the fixed block, and the floating distance adjusting screw is arranged below the convex portion.

[0019] Rotating the floating distance adjusting screw can change the length of the floating distance adjusting screw extending out of the fixed block, and the floating distance adjusting screw is used for adjusting the lower floating distance of the floating pressing block; when the floating pressing block is pressed to position, the lower end surface of the convex portion of the guide plate abuts against the floating distance adjusting screw.

[0020] As a further improvement of the utility model, the length of the floating pressing block is longer than the length of the middle weakening line on the plastic part, and the width of the floating pressing block is wider than the width of the middle weakening line on the plastic part.

[0021] Compared with the prior art, the utility model has the beneficial effects that:

[0022] The utility model discloses a floating pressing block and an elastic lifting component along the weakening line, solve the problem that the traditional infrared welding tire mold lacks effective pressing means for the non-bonding area, especially the weakening line area, realize accurate pressure and orthopedic treatment for the weakening line area of the plastic part.

[0023] The utility model discloses an elastic lifting structure between the floating pressing block and the upper die base plate, solve the problem that the traditional tire mold is difficult to add a pressing mechanism in a narrow area, realize effective pressing of the plastic part in the narrow weakening line area.

[0024] The utility model discloses a floating pressing block in the welding process to the weakening line area, solve the problem that the plastic part is caused by the weakening line and thermal expansion and cold shrinkage and the surface is concave deformation, realize the improvement of product appearance quality and the guarantee of welding quality. DRAWINGS

[0025] Figure 1A structure schematic view of a traditional infrared welding tire membrane;

[0026] Figure 2 A structure schematic view of an infrared welding tire membrane inner weakened line area orthopedic mechanism disclosed by an embodiment of the utility model;

[0027] Figure 3 An infrared welding tire membrane inner weakened line area floating pressing block assembly schematic view disclosed by an embodiment of the utility model;

[0028] Figure 4 A second angle floating pressing block assembly schematic view of an infrared welding tire membrane inner weakened line area disclosed by an embodiment of the utility model;

[0029] Figure 5 A third angle floating pressing block assembly schematic view of an infrared welding tire membrane inner weakened line area disclosed by an embodiment of the utility model;

[0030] Figure 6 A fourth angle floating pressing block assembly schematic view of an infrared welding tire membrane inner weakened line area disclosed by an embodiment of the utility model;

[0031] Figure 7 A structure schematic view of an infrared welding tire membrane inner weakened line area elastic lifting component disclosed by an embodiment of the utility model;

[0032] Figure 8 A guiding plate, guide rail and sliding block cooperation schematic view of an infrared welding tire membrane inner weakened line area disclosed by an embodiment of the utility model.

[0033] In the drawing:

[0034] 1, upper die base plate; 2, air bag frame edge frame fixed module; 3, air bag frame door fixed module; 3.1, weakened groove; 4, floating pressing block; 5, lower floating plate; 5.1, guiding plate; 5.2, convex part; 6, guide rail; 7, sliding block; 8, guiding rod; 9, spring; 10, pre-pressing adjusting nut; 11, L-shaped support; 12, fixed block; 13, floating distance adjusting screw; 14, air bag frame door fixed module base. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0036] In the description of the utility model, it is necessary to explain that the orientation or position relation indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is the orientation or position relation based on the drawing shown, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0037] In the description of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0038] The utility model will be described in further detail below in combination with the drawings:

[0039] As shown in Figures 2-3 The utility model provides a kind of infrared welding membrane inner weakening line area orthopedic mechanism according to the utility model, including upper die base plate 1, air bag frame border fixed module 2 and air bag frame door fixed module 3, wherein, air bag frame border fixed module 2 is fixed on upper die base plate 1, air bag frame door fixed module 3 is set in the region surrounded by air bag frame border fixed module 2, and it is fixed on upper die base plate 1. Weakening groove 3.1 is provided on air bag frame door fixed module 3 along the weakening line direction of plastic piece. It further includes: floating block 4;Floating block 4 is set in weakening groove 3.1 along weakening line direction, and elastic lifting component is arranged between floating block 4 and upper die base plate 1, in the process of infrared welding, floating block 4 can be self-adaptively pressed down by elastic lifting component, and floating block 4 can be attached to the middle weakening line area of plastic piece and apply pressure to weakening line area.

[0040] In this embodiment, by setting a floating pressure block 4 along the weakening line and an elastic lifting component, the problem of traditional infrared welding molds lacking effective clamping means for non-bonded areas, especially weakening line areas, is solved, achieving precise pressure and shaping of the weakening line area of ​​the plastic part; by setting an elastic lifting structure between the floating pressure block 4 and the upper mold base plate 1, the problem of traditional molds having difficulty adding clamping mechanisms in narrow areas is solved, achieving effective clamping of the plastic part in narrow weakening line areas; by using the floating pressure block 4 to apply pressure to the weakening line area during the welding process, the problem of surface depression deformation of the plastic part caused by the weakening line and thermal expansion and contraction is solved, achieving improvement in product appearance quality and guarantee of welding quality.

[0041] Specifically:

[0042] like Figures 3-5 As shown, in the above embodiment, preferably, since the floating pressure block 4 mainly acts on the weakening line area of ​​the plastic part, the length of the floating pressure block 4 is longer than the length of the middle weakening line on the plastic part, and the width of the floating pressure block 4 is wider than the width of the middle weakening line on the plastic part. This achieves coverage of the weakening line by the floating pressure block 4. In this embodiment, the length of the floating pressure block 4 is 247mm, and the width of the floating pressure block 4 is 5mm.

[0043] like Figures 6-8 As shown, in the above embodiment, preferably, the elastic lifting component includes: a lower floating plate 5, a guide rail 6, and an elastic preload adjustment part; wherein, a floating pressure block 4 is fixed at the lower part of the lower floating plate 5, and guide plates 5.1 are respectively arranged vertically upward at both ends of the lower floating plate 5; guide rails 6 are respectively arranged vertically on the outer sides of the guide plates 5.1 on both sides of the upper mold base plate 1, and sliders 7 are respectively slidably arranged on the opposite sides of the guide rails 6; the guide plates 5.1 at both ends of the lower floating plate 5 are respectively fixed on the sliders 7 on the corresponding sides; the upper part of the lower floating plate 5 is elastically connected to the upper mold base plate 1 through the elastic preload adjustment part, and the elastic preload adjustment part provides elastic support force for the rising or falling of the lower floating plate 5.

[0044] In this embodiment, by setting guide rails 6 and sliders 7 on both sides of the lower floating plate 5, and in conjunction with guide plates 5.1 at both ends of the lower floating plate 5, the floating pressure block 4 can be made to float stably, effectively preventing the floating pressure block 4 from tilting during movement and causing production accidents.

[0045] In the above embodiment, preferably, the elastic preload adjustment part includes guide rods 8, preload adjustment nuts 10, and springs 9; wherein, guide rods 8 are installed at intervals on the upper part of the lower floating plate 5, and the guide rods 8 are arranged in the vertical direction; springs 9 are vertically arranged on the upper mold base plate 1 corresponding to the positions of the two guide rods 8; in actual installation, the upper ends of the two guide rods 8 are inserted into the corresponding springs 9, and the lower ends of the two guide rods 8 are fixed to the upper part of the lower floating plate 5. In order to achieve effective adjustment of the preload of the springs 9, in this embodiment, preload adjustment nuts 10 are sleeved on both guide rods 8, and the springs 9 are located between the preload adjustment nuts 10 and the upper mold base plate 1. When the preload adjustment nuts 10 are rotated, the preload of the springs 9 can be adjusted to meet the pressure requirements of the floating pressure block 4.

[0046] In the above embodiments, preferably, the spring 9 is a square cross-section spring with an outer diameter of 12mm and an inner diameter of 6mm, the pressure of the spring 9 is 10N / mm, and the preload of the spring 9 is 15mm.

[0047] In the above embodiment, preferably, the guide rod 8 also has another function, namely, to serve as the dead point for the floating pressure block 4 to retract. When the floating pressure block 4 retracts to a certain position, the end of the guide rod 8 inserted into the spring 9 will abut against the upper mold base plate 1. At this time, the floating pressure block 4 will no longer retract.

[0048] In the above embodiments, preferably, regarding the height of the floating pressure block 4 and the welding surface of the upper plastic part to be welded, if the floating pressure block 4 is too high, the distance between the floating pressure block 4 and the infrared heating mold will be too close during heating, causing the floating pressure block 4 to be heated and potentially damaging the plastic in the area to be shaped during straightening, thus negating the purpose of straightening; if the floating pressure block 4 is too low, the straightening amount will be slightly insufficient, affecting the straightening effect. Therefore, in this embodiment, under the preload of the spring 9, the lower end face of the floating pressure block 4 is 2-3 mm higher than the welding surface of the upper plastic part to be welded.

[0049] In this embodiment, the elastic preload adjustment part, together with the lower floating plate 5, the guide rail 6 and the slider 7, can realize the adaptive floating of the floating pressure block 4, so as to avoid the floating pressure block 4 affecting the pressure of the welding mold on the bonding area when it presses down on the product.

[0050] like Figures 5-6 As shown, in the above embodiment, preferably, it also includes an upper limit member and a lower limit member; both guide plates 5.1 have protrusions 5.2 extending horizontally to both sides along the lifting direction perpendicular to the guide rail 6, and the upper mold base plate 1 is provided with an upper limit member above the protrusion 5.2 on one side of the guide plate 5.1, and a lower limit member is provided below the protrusion 5.2 on the other side of the guide plate 5.1; the upper limit member and the lower limit member are used to limit the vertical floating distance of the floating pressure block 4.

[0051] In the above embodiment, the upper and lower limit members are diagonally arranged, that is, the upper limit member is arranged above the front side protrusion 5.2 of the left guide plate 5.1, and the lower limit member is arranged below the rear side protrusion 5.2 of the left guide plate 5.1; the lower limit member is arranged below the front side protrusion 5.2 of the right guide plate 5.1, and the upper limit member is arranged above the rear side protrusion 5.2 of the right guide plate 5.1.

[0052] In the above embodiment, preferably, the upper limit member comprises an L-shaped bracket 11; the horizontal segment of the L-shaped bracket 11 is fixedly installed on the upper die bottom plate 1, and the vertical segment of the L-shaped bracket 11 is arranged above the protrusion 5.2; when the floating pressing block 4 is retracted in place, the upper end surface of the protrusion 5.2 of the guide plate 5.1 abuts against the lower end surface of the vertical segment of the L-shaped bracket 11.

[0053] In the above embodiment, preferably, the lower limit member comprises a fixed block 12 and a floating distance adjusting screw 13; the upper die bottom plate 1 is provided with an air bag door fixing module base 14 corresponding to the two ends of the air bag door fixing module 3, the upper end of the air bag door fixing module base 14 is fixed on the upper die bottom plate 1, and the lower end supports the air bag door fixing module 3; the fixed block 12 is fixed on the air bag door fixing module base 14, the top of the fixed block 12 is screw-connected with the floating distance adjusting screw 13 in the vertical direction, and the floating distance adjusting screw 13 is arranged below the protrusion 5.2; the length of the floating distance adjusting screw 13 protruding from the fixed block 12 can be changed by rotating the floating distance adjusting screw 13, and the floating distance adjusting screw 13 is used for adjusting the floating distance of the floating pressing block 4; when the floating pressing block 4 is pressed down in place, the lower end surface of the protrusion 5.2 of the guide plate 5.1 abuts against the floating distance adjusting screw 13.

[0054] In the above embodiment, preferably, the spring force of the floating pressing block 4 is smaller than the pressure of the infrared welded tire mold. During welding, because the upper end surface of the floating pressing block 4 is higher than the welding surface of the upper plastic part to be welded, the floating pressing block 4 first contacts the lower plastic part to be welded. At the same time, because the spring force of the floating pressing block 4 is smaller than the equipment pressure, the floating pressing block 4 moves upward into the tire mold under the equipment pressure until the lower dead point of the floating pressing block 4 is reached. At this time, the floating pressing block 4 moves together with the upper die until the welding is completed. In this process, the floating pressing block 4 is pressed in the orthopedic area of the weakening line under the action of the spring force, preventing the plastic part from freely shrinking and deforming, so as to achieve the orthopedic purpose.

[0055] The preferred embodiments of the utility model are merely used for limiting the utility model, and the utility model can have various changes and variations for the person skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An infrared welding tire membrane inner weakening line area rectifying mechanism, comprising an upper die base plate, a gas bag frame edge frame fixing module is fixed on the upper die base plate, a gas bag frame door fixing module is arranged in the area surrounded by the gas bag frame edge frame fixing module; the gas bag frame door fixing module is fixed to the upper die base plate, and a weakening groove is arranged along the weakening line direction of the plastic part, characterized in that, Also include: Floating block; The floating block is arranged in the weakening groove along the weakening line, and an elastic lifting component is arranged between the floating block and the upper die bottom plate. In the infrared welding process, the floating block can be automatically pressed down through the elastic lifting component, and the floating block can be attached to the middle weakening line area of the plastic part and apply pressure to the weakening line area.

2. The infrared weld bead line area orthopedic mechanism of claim 1, wherein, The elastic lifting component includes a lower floating plate, a guide rail, and an elastic pre-press adjusting part; The lower part of the lower floating plate is fixed with the floating block, and the two ends of the lower floating plate are respectively provided with guide plates vertically upward. The outer sides of the two guide plates correspond to the upper die bottom plate and are respectively provided with guide rails in the vertical direction. The opposite sides of the two guide rails are respectively provided with sliding blocks, and the two end guide plates of the lower floating plate are respectively fixed on the sliding blocks on the corresponding side. The upper part of the lower floating plate is elastically connected to the upper die bottom plate through the elastic pre-press adjusting part, which provides elastic support force for the upward or downward movement of the lower floating plate.

3. The infrared weld bead line area orthopedic mechanism of claim 2, wherein, The elastic pre-press adjusting part includes a guide rod, a pre-press adjusting nut, and a spring. The upper part of the lower floating plate is installed with the guide rod left and right, and the guide rod is arranged in the vertical direction. The upper die bottom plate corresponds to the two guide rods and is respectively provided with the spring in the vertical direction. The upper ends of the two guide rods are inserted into the corresponding spring, and the lower ends of the two guide rods are respectively fixed on the upper part of the lower floating plate. The pre-press adjusting nut is sleeved on the two guide rods, and the pre-press adjusting nut is used to adjust the pre-press force of the spring.

4. The infrared welding bead in-film line-attenuation area orthopedic mechanism of claim 3, wherein, Under the pre-press force of the spring, the lower end surface of the floating block is 2-3mm higher than the welding surface of the upper plastic part to be welded.

5. The infrared welding bead in-film internal weakening line area orthopedic mechanism of claim 2, wherein, It also includes an upper limit piece and a lower limit piece. The two guide plates extend horizontally to both sides along a direction perpendicular to the lifting direction of the guide rail, and the upper die bottom plate is provided with the upper limit piece above one side of the guide plate and the lower limit piece below the other side of the guide plate. The upper limit piece and the lower limit piece are used to limit the upward and downward floating distance of the floating block.

6. The infrared weld bead in-film line-attenuation area orthopedic mechanism of claim 5, wherein, The upper limit piece includes an L-shaped bracket, and the horizontal segment of the L-shaped bracket is fixedly installed on the upper die bottom plate, and the vertical segment of the L-shaped bracket is arranged above the convex part. When the floating block is retreated to the position, the upper end surface of the convex part of the guide plate abuts against the lower end surface of the vertical segment of the L-shaped bracket.

7. The infrared welding bead line inner weakening line area orthopedic mechanism of claim 5, wherein, The lower limit piece includes a fixed block and a floating distance adjusting screw. The upper die bottom plate is provided with an air bag door fixing module base at both ends of the air bag door fixing module, and the upper end of the air bag door fixing module base is fixed on the upper die bottom plate, and the lower end supports the air bag door fixing module. The fixed block is fixed on the air bag door fixing module base, and the top of the fixed block is screwed with the floating distance adjusting screw in the vertical direction, and the floating distance adjusting screw is arranged below the convex part. The floating distance adjusting screw is used for adjusting the floating distance of the floating pressing block. The convex end surface of the guide plate is abutted against the floating distance adjusting screw when the floating pressing block is pressed to the position.

8. The infrared welding bead line of weakness zone area orthopedic mechanism of claim 1, wherein, The length of the floating pressing block is longer than the length of the middle weakening line on the plastic part, and the width of the floating pressing block is wider than the width of the middle weakening line on the plastic part.

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