Rail transit door rubber strip lining forming device and forming method

Abstract

The application discloses a rail transit door rubber strip lining forming device and forming method, which comprises a pressure device and a mold. The pressure device comprises a sliding block and a placing platform. The mold comprises a male die device and a female die device. The upper end of the male die device is provided with a sliding block interface connected with the sliding block. The lower end of the male die device is provided with a circular-arc-shaped blade mouth boss and a triangular blade mouth boss. The lower end of the female die device is provided with a platform interface connected with the placing platform. The upper end of the female die device is provided with a u-shaped groove and a v-shaped groove corresponding to the circular-arc-shaped blade mouth boss and the triangular blade mouth boss. The male die device moves reciprocally towards the male die device following the sliding block. The application is improved on the basis of the existing forming device. The number and position of the cutting tools and the grooves are changed. The one-time stamping forming is changed into twice stamping forming. The springback stress during the stamping forming of the rubber strip lining is reduced. The wrapping of the cutting tools is increased. Therefore, the problem of poor forming precision of the rubber strip lining in the prior art is solved.

Description

Technical fields:

[0001] This invention relates to the field of machining technology, and in particular to an assembled extrusion die and its manufacturing method. Background technology:

[0002] To meet the requirements for door sealing and passenger comfort during operation through tunnels and other challenging conditions, and to prevent drafts and noise, rail transit vehicle design places extremely stringent demands on door sealing. Urban rail vehicle doors utilize a ring-shaped, bi-directional lip-type sealing strip fixed around the door leaf, forming a sealing structure with an aluminum profile sealing frame fixed around the car body frame. Liners are typically used at the lower door frame where the sealing strip is installed, serving both a positioning and aesthetic purpose. The lining's shape generally matches the door's edge contour, exhibiting a small, rounded-bottom U-shaped groove structure (see details...). Figure 8 (45° isometric view of the rubber strip lining plate).

[0003] Traditional U-groove structures are generally formed by one-time bending, but the forming of door panels places extremely strict requirements on bending tools. The structural features limit the cutting edge angle of the tool, and small-angle cutting edges have poor rigidity and durability. Furthermore, the traditional V-groove configuration also reduces forming accuracy. After the rubber strip liner enters the V-groove, the tolerance between the tool and the V-groove prevents the rubber strip liner from properly wrapping the tool, resulting in inadequate coverage of the door edge contour and failure to meet the design intent of the liner. Summary of the Invention:

[0004] The technical problem to be solved by the present invention is to improve the existing molding device by changing the number and position of the cutting tools and the groove, thereby solving the problem of poor molding accuracy of the rubber strip backing in the prior art.

[0005] To solve the above-mentioned technical problems, the present invention provides a technical solution: a molding device for a door rubber strip liner of a rail transit vehicle, comprising a pressure device and a mold. The pressure device includes a slider and a placement platform. The mold includes a punch device and a die device. The die device is disposed on the placement platform, and the punch device is disposed on the slider and reciprocates towards the punch device following the slider. The punch device is characterized in that: the upper end of the punch device is provided with a slider interface connected to the slider, and the lower end of the punch device is provided with an arc-shaped cutting edge boss and a triangular cutting edge boss, with the two ends of the arc-shaped cutting edge boss having an arc transition treatment.

[0006] The lower end of the die device is provided with a platform interface connected to the placement platform, and the upper end of the die device is provided with a U-shaped groove and a V-shaped groove corresponding to the arc-shaped cutting edge boss and the triangular cutting edge boss. After the triangular cutting edge boss is embedded in the V-shaped groove, the rubber strip liner is pre-bent, and after the arc-shaped cutting edge boss is embedded in the U-shaped groove, the pre-treated rubber strip liner is formed.

[0007] Furthermore, the protruding angle of the triangular cutting edge boss is 90°, and the bottom angle of the V-shaped groove is 90°, so that the bending angle of the rubber strip liner after bending pretreatment is 90°.

[0008] Furthermore, the die device at the V-shaped groove is equipped with an indicator scale to facilitate the placement of the rubber strip liner.

[0009] Furthermore, the arc-shaped cutting edge protrusion is tilted to one side, so that there is an angle between the vertical axis of the arc-shaped cutting edge protrusion and the vertical axis of the punch device. The U-shaped groove is tilted to one side, so that there is an angle between the vertical axis of the U-shaped groove and the vertical axis of the die device. The arc-shaped cutting edge protrusion and the U-shaped groove have the same tilt direction and angle, so that the tilt angle of one side of the arc-shaped cutting edge protrusion and the U-shaped groove is smaller.

[0010] To solve the above-mentioned technical problems, the present invention provides a technical solution as follows: a method for forming a door rubber strip liner of a rail transit vehicle according to the above-described forming device, the steps of which are:

[0011] Step 1: The die cavity is mounted on the placement platform, and the punch is mounted on the slider;

[0012] Step 2: Place the cut rubber strip backing plate on the V-shaped groove for bending pretreatment;

[0013] Step 3: Place the pre-bent rubber strip liner on the U-shaped groove for shaping.

[0014] Step 4: Conduct quality inspection on the molded rubber strip lining.

[0015] Furthermore, in step one, the specific position of the die device on the placement platform is adjusted according to the punch device, so that when the punch device moves toward the die device along with the slider, the arc-shaped cutting edge boss and the triangular cutting edge boss can be embedded in the U-shaped groove and the V-shaped groove.

[0016] Furthermore, in step two, the bending pretreatment step is as follows:

[0017] 1) Cut the rubber strip backing board to the corresponding dimensions;

[0018] 2) Place the cut rubber strip backing plate on the concave mold device and cover it on the V-shaped groove;

[0019] 3) Adjust the placement of the rubber strip liner according to the markings on the die device at the V-groove;

[0020] 4) The slider drives the punch device to move towards the die device. After the triangular cutting edge boss hits the rubber strip liner, it is embedded into the V-shaped groove together with the rubber strip liner, completing the 90° bending pre-processing of the rubber strip liner.

[0021] Furthermore, in step three, the molding process includes the following steps:

[0022] 1) Place the pre-bent rubber strip liner on the die device and cover it on the V-shaped groove;

[0023] 2) The right-angle protrusion of the rubber strip inserts into the U-shaped groove, and the relatively longer side rests on the side with the smaller angle of inclination in the U-shaped groove;

[0024] 3) The slider drives the punch device to move towards the die device. After the arc-shaped cutting edge boss hits the rubber strip liner, it is embedded into the U-shaped groove together with the rubber strip liner. The longer side of the rubber strip liner is exposed in the U-shaped groove, thus completing the forming process of the rubber strip liner.

[0025] 4) When the slider drives the punch device to reset and move, the arc-shaped cutting edge boss pushes the longer side of the rubber strip liner at the moment it exits the U-shaped groove, so that the formed rubber strip liner is automatically peeled off from the U-shaped groove.

[0026] Furthermore, in step four, the quality inspection process involves inspecting the appearance of the molded rubber strip lining and removing any burrs generated during cutting.

[0027] The beneficial effects of this invention are as follows:

[0028] 1. This application improves upon the existing forming device by changing the number and position of the cutting tools and the grooves, changing the forming process from one stamping to two stampings. This reduces the springback stress during the forming of the rubber strip liner and increases the wrapping effect on the cutting tools, thereby solving the problem of poor forming accuracy of the rubber strip liner in the prior art.

[0029] 2. In this application, the lower end of the punch device is provided with an arc-shaped cutting edge boss and a triangular cutting edge boss, and the lower end of the die device is provided with a U-shaped groove and a V-shaped groove. First, the triangular cutting edge boss and the V-shaped groove cooperate to perform a stamping, and then the arc-shaped cutting edge boss and the U-shaped groove perform a forming stamping. In this way, a part of the springback stress of the rubber strip liner is released through the first stamping, reducing the springback force during forming stamping and increasing the accuracy of the formed rubber strip liner. At the same time, the two ends of the arc-shaped cutting edge boss are treated with arc transition to avoid stress concentration, resulting in good forming accuracy, small deformation, and high fault tolerance. This makes the forming of the rubber strip liner natural, while the arc-shaped structure facilitates the release of springback stress.

[0030] 3. In this application, the protruding angle of the triangular cutting edge boss and the bottom angle of the V-shaped groove are both 90°, so that the bending angle of the rubber strip liner after bending pretreatment is 90°, which can minimize the springback stress and facilitate placement during molding.

[0031] 4. The die device at the V-shaped groove in this application is provided with an indicator scale to facilitate the placement of the rubber strip liner. When the rubber strip liner is placed according to the indicator scale, it is convenient to place the rubber strip liner quickly, reduce the placement time, improve work efficiency, make the placement of the rubber strip liner more accurate, and the stamped rubber strip liner has two sides of unequal length to ensure the molding quality.

[0032] 5. In this application, the arc-shaped cutting edge boss and the U-shaped groove have the same inclination direction and angle, so that the inclination angle of one side of the arc-shaped cutting edge boss and the U-shaped groove is smaller, thus making the arc-shaped cutting edge boss and the U-shaped groove as a whole inclined. This facilitates the elimination of springback stress during stamping. At the same time, the arc-shaped cutting edge boss of the punch device and the U-shaped groove of the die device cover the rubber strip liner in the cavity. The rubber strip liner undergoes plastic deformation along the cavity structure, and when the arc-shaped cutting edge boss is reset, it can push the longer side of the rubber strip liner extending out of the U-shaped groove (the longer side of the rubber strip liner is at the opening of the U-shaped groove), so that the formed rubber strip liner automatically peels off from the U-shaped groove, preventing the formed rubber strip liner from getting stuck in the U-shaped groove and making it easy to remove the formed rubber strip liner.

[0033] To make the above and other objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached image description:

[0034] To more clearly illustrate the technical solutions in this invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only eight of the drawings in this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram of the structure of this application.

[0036] Figure 2 This is a schematic diagram of the punch device moving up and down.

[0037] Figure 3 This is a schematic diagram of the structure when the arc-shaped cutting edge boss moves in and out of the U-shaped groove.

[0038] Figure 4 This is a schematic diagram of the connection structure where the rubber strip liner is placed on the U-shaped groove.

[0039] Figure 5 for Figure 4 The left view.

[0040] Figure 6 This is a schematic diagram of the structure after the rubber strip lining plate has been molded.

[0041] Figure 7 for Figure 6 The left view.

[0042] Figure 8 This is a schematic diagram of the rubber strip liner.

[0043] In the figure, 1-punch device, 2-die device, 3-slider interface, 4-arc-shaped cutting edge boss, 5-triangular cutting edge boss, 6-platform interface, 7-U-shaped groove, 8-V-shaped groove; A-rubber strip liner. Detailed implementation method:

[0044] Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While some embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the invention. It should be understood that the accompanying drawings and embodiments are for illustrative purposes only and are not intended to limit the scope of protection of the invention.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "fixing," "screw connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] The names of the messages or information exchanged between the multiple devices in the embodiments of the present invention are for illustrative purposes only and are not intended to limit the scope of these messages or information.

[0047] Example 1

[0048] like Figure 1-8 As shown, a molding device for a door seal strip of a rail transit vehicle is disclosed, including a pressure device and a mold. The pressure device includes a slider and a placement platform. The mold includes a punch device 1 and a die device 2. The die device 2 is set on the placement platform. The punch device 1 is set on the slider and moves back and forth with the slider. The upper end of the punch device 1 is provided with a slider interface 3 connected to the slider. The lower end of the punch device 1 is provided with an arc-shaped cutting edge boss 4 and a triangular cutting edge boss 5, and the two ends of the arc-shaped cutting edge boss 4 are rounded. The lower end of the die device 2 is provided with a platform interface 6 connected to the placement platform. The upper end of the die device 2 is provided with an interface 6 connected to the arc-shaped cutting edge boss 4. The U-shaped groove 7 and V-shaped groove 8, corresponding to the triangular cutting edge boss 5, are used to pre-bend the rubber strip liner A after the triangular cutting edge boss 5 is embedded in the V-shaped groove 8. After the arc-shaped cutting edge boss 4 is embedded in the U-shaped groove 7, the pre-treated rubber strip liner A is formed. General-purpose pressure equipment (such as bending machine, hydraulic press) can meet the installation requirements of the device. The traditional bending tool and V-groove structure are abandoned. Referring to the structural characteristics of the rubber strip liner A, the closed cavity formed by the punch device 1 and the die device 2 is used to achieve high-precision forming of the rubber liner under the action of pressure transmission. The deformation is small and the forming efficiency is high, which meets the design intention of the rubber strip liner A.

[0049] The punch device 1 has an arc-shaped cutting edge boss 4 and a triangular cutting edge boss 5 at its lower end, and the die device 2 has a U-shaped groove 7 and a V-shaped groove 8 at its lower end. First, the triangular cutting edge boss 5 and the V-shaped groove 8 work together to perform a stamping, and then the arc-shaped cutting edge boss 4 and the U-shaped groove 7 perform a forming stamping. This first stamping releases some of the springback stress of the rubber strip liner A, reduces the springback force during forming stamping, and increases the accuracy of the formed rubber strip liner A. At the same time, the arc-shaped cutting edge boss 4 has rounded transitions at both ends to avoid stress concentration, resulting in good forming accuracy, small deformation, and high fault tolerance. This allows the rubber strip liner A to be formed naturally, while the arc-shaped structure facilitates the release of springback stress.

[0050] The protruding part of the triangular blade boss 5 has an angle of 90°, and the bottom angle of the V-shaped groove 8 has an angle of 90°, so that the bending angle of the rubber strip liner A after bending pretreatment is 90°; thus, the bending angle of the rubber strip liner A after bending pretreatment is 90°, which can minimize the springback stress and facilitate placement during molding.

[0051] Example 2

[0052] like Figure 4-8 As shown, this embodiment is obtained by adding technical features such as indicator scale on the basis of embodiment one. The other technical features are the same as those in embodiment one. The similarities will not be repeated here. The difference between this embodiment and embodiment one is that the concave mold device 2 at the V-shaped groove 8 is provided with an indicator scale to facilitate the placement of the rubber strip liner A.

[0053] In this embodiment, the setting of the indicator scale facilitates the quick placement of the rubber strip liner A when it is placed according to the indicator scale, reduces placement time, improves work efficiency, makes the placement of the rubber strip liner A more accurate, and ensures the forming quality by having two sides of unequal length after stamping.

[0054] Example 3

[0055] like Figure 1-7 As shown, this embodiment is obtained by changing the tilt angle of the arc-shaped cutting edge boss 4 and the U-shaped groove 7 based on embodiment two. The other technical features are the same as those in embodiment two, and the similarities will not be repeated here. The difference between this embodiment and embodiment two is that the arc-shaped cutting edge boss 4 is tilted to one side, so that there is an angle between the vertical axis of the arc-shaped cutting edge boss 4 and the vertical axis of the punch device 1. The U-shaped groove 7 is tilted to one side, so that there is an angle between the vertical axis of the U-shaped groove 7 and the vertical axis of the die device 2. The tilt direction and angle of the arc-shaped cutting edge boss 4 and the U-shaped groove 7 are the same, so that the tilt angle of one side of the arc-shaped cutting edge boss 4 and the U-shaped groove 7 is smaller.

[0056] In this embodiment, the arc-shaped cutting edge boss 4 and the U-shaped groove 7 have the same inclination direction and angle, so that one side of the arc-shaped cutting edge boss 4 and the U-shaped groove 7 has a smaller inclination angle (specifically, when the cutting edge of the arc-shaped cutting edge boss 4 passes through the opening of the U-shaped groove 7, the distance between the cutting edge and the side with the smaller inclination angle is 0.7-0.9 times the thickness of the rubber strip liner A, preferably 0.8 times, which facilitates the smooth entry and exit of the arc-shaped cutting edge boss 4 into the U-shaped groove 7 and does not excessively compress the rubber strip liner A during resetting). This makes the arc-shaped cutting edge boss 4 and the U-shaped groove 7 generally inclined, which facilitates the elimination of springback stress during stamping. It is precisely because of this inclination that... Furthermore, the longer side of the rubber strip liner A is positioned on the side with a smaller inclination angle. The arc-shaped cutting edge boss 4 of the punch device 1 and the U-shaped groove 7 of the die device 2 enclose the rubber strip liner A in the cavity. The rubber strip liner A undergoes plastic deformation along the cavity structure. After the molding operation, the longer side of the rubber strip liner A is located at the opening of the U-shaped groove 7. When the arc-shaped cutting edge boss 4 is reset, it can move the rubber strip liner A. Also, when the arc-shaped cutting edge boss 4 is reset, it can move the longer side of the rubber strip liner A extending out of the U-shaped groove 7, so that the molded rubber strip liner A automatically peels off from the U-shaped groove 7, preventing the molded rubber strip liner A from getting stuck in the U-shaped groove 7, and making it easy to remove the molded rubber strip liner A.

[0057] The manufacturing process of the overall technical solution formed by the above embodiments constitutes another technical solution disclosed in this application, which is: a method for forming a door rubber strip liner A of a rail transit vehicle, the steps of which are:

[0058] Step 1: The die device 2 is set on the placement platform, and the punch device 1 is set on the slider.

[0059] Specifically, when the punch device 1 is adjusted to the specific position of the die device 2 on the placement platform, so that when the punch device 1 moves toward the die device 2 along with the slider, the arc-shaped cutting edge boss 4 and the triangular cutting edge boss 5 can be embedded in the U-shaped groove 7 and the V-shaped groove 8.

[0060] Step 2: Place the cut rubber strip backing plate A on the V-shaped groove 8 for bending pretreatment.

[0061] The bending pretreatment steps are as follows:

[0062] 1) Cut the rubber strip backing plate A to the corresponding dimensions;

[0063] 2) Place the cut rubber strip liner A on the concave mold device 2 and cover it on the V-shaped groove 8;

[0064] 3) Adjust the placement of the rubber strip liner A according to the indication scale on the die device 2 at the V-groove 8;

[0065] 4) The slider drives the punch device 1 to move towards the die device 2. After the triangular cutting edge boss 5 presses against the rubber strip liner A, it is embedded into the V-shaped groove 8 together with the rubber strip liner A, completing the 90° bending pre-processing of the rubber strip liner A.

[0066] Step 3: Place the pre-bent rubber strip liner A on the U-shaped groove 7 for forming.

[0067] The molding process includes the following steps:

[0068] 1) Place the pre-bent rubber strip liner A on the die device 2 and cover it on the V-shaped groove 8;

[0069] 2) The right-angle protrusion of the rubber strip liner A extends into the U-shaped groove 7, and the relatively longer side rests on the side with a smaller inclination angle in the U-shaped groove 7;

[0070] 3) The slider drives the punch device 1 to move towards the die device 2. After the arc-shaped cutting edge boss 4 presses against the rubber strip liner A, it is embedded into the U-shaped groove 7 together with the rubber strip liner A. The arc-shaped cutting edge boss 4 of the punch device 1 and the U-shaped groove 7 of the die device 2 cover the rubber strip liner A in the cavity. The rubber strip liner A undergoes plastic deformation along the cavity structure, and the longer side of the rubber strip liner A is at the opening of the U-shaped groove 7, thus completing the forming process of the rubber strip liner A.

[0071] 4) When the slider drives the punch device 1 to reset and move, the arc-shaped cutting edge boss 4 pushes the longer side of the rubber strip liner A at the moment it exits the U-shaped groove 7, so that the formed rubber strip liner A is automatically peeled off from the U-shaped groove 7.

[0072] Step 4: Perform quality inspection on the molded rubber strip lining plate A.

[0073] The quality inspection process includes: inspecting the appearance of the molded rubber strip lining A and removing the burrs produced during cutting.

[0074] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A molding device for a door seal strip liner of a rail transit vehicle, comprising a pressure device and a mold, wherein the pressure device includes a slider and a placement platform, and the mold includes a punch and a die, wherein the die is disposed on the placement platform, and the punch is disposed on the slider and reciprocates toward the punch following the slider, characterized in that: The upper end of the punch device is provided with a slider interface connected to the slider, and the lower end of the punch device is provided with an arc-shaped cutting edge boss and a triangular cutting edge boss, with the two ends of the arc-shaped cutting edge boss being rounded. The lower end of the die device is provided with a platform interface connected to the placement platform, and the upper end of the die device is provided with a U-shaped groove and a V-shaped groove corresponding to the arc-shaped cutting edge boss and the triangular cutting edge boss. After the triangular cutting edge boss is embedded in the V-shaped groove, the rubber strip liner is pre-bent, and after the arc-shaped cutting edge boss is embedded in the U-shaped groove, the pre-treated rubber strip liner is formed. The protruding part of the triangular cutting edge boss has an angle of 90°, and the bottom angle of the V-shaped groove has an angle of 90°, so that the bending angle of the rubber strip liner after bending pretreatment is 90°. The arc-shaped cutting edge protrusion is tilted to one side, so that there is an angle between the vertical axis of the arc-shaped cutting edge protrusion and the vertical axis of the punch device. The U-shaped groove is tilted to one side, so that there is an angle between the vertical axis of the U-shaped groove and the vertical axis of the die device. The arc-shaped cutting edge protrusion and the U-shaped groove are tilted in the same direction and at the same angle, so that the tilt angle of one side of the arc-shaped cutting edge protrusion and the U-shaped groove is smaller. When the slider drives the punch device to reset and move, the arc-shaped cutting edge boss pushes the longer side of the rubber strip liner at the moment it exits the U-shaped groove, so that the formed rubber strip liner is automatically peeled off from the U-shaped groove.

2. The rail transit vehicle door rubber strip lining plate forming device according to claim 1, characterized in that: The die device at the V-groove has an indicator scale to facilitate the placement of the rubber strip liner.

3. A method for forming a door rubber strip liner for rail transit vehicles, utilizing the door rubber strip liner forming apparatus according to any one of claims 1-2, comprising the following steps: Step 1: The die cavity is mounted on the placement platform, and the punch is mounted on the slider; Step 2: Place the cut rubber strip backing plate on the V-shaped groove for bending pretreatment; Step 3: Place the pre-bent rubber strip liner on the U-shaped groove for shaping. Step 4: Conduct quality inspection on the molded rubber strip lining.

4. The method for forming a door sealant liner for rail transit vehicles according to claim 3, characterized in that: In step one, the specific position of the die device on the placement platform is adjusted according to the punch device, so that when the punch device moves toward the die device along with the slider, the arc-shaped cutting edge boss and the triangular cutting edge boss can be embedded in the U-shaped groove and the V-shaped groove.

5. The method for forming a door sealant liner for rail transit vehicles according to claim 3, characterized in that: In step two, the bending pretreatment step is as follows: 1) Cut the rubber strip backing board to the corresponding dimensions; 2) Place the cut rubber strip backing plate on the concave mold device and cover it on the V-shaped groove; 3) Adjust the placement of the rubber strip liner according to the markings on the die device at the V-groove; 4) The slider drives the punch device to move towards the die device. After the triangular cutting edge boss hits the rubber strip liner, it is embedded into the V-shaped groove together with the rubber strip liner, completing the 90° bending pre-processing of the rubber strip liner.

6. The method for forming a door sealant liner for rail transit vehicles according to claim 3, characterized in that: In step three, the molding process includes the following steps: 1) Place the pre-bent rubber strip liner on the die device and cover it on the V-shaped groove; 2) The right-angle protrusion of the rubber strip inserts into the U-shaped groove, and the relatively longer side rests on the side with the smaller angle of inclination in the U-shaped groove; 3) The slider drives the punch device to move towards the die device. After the arc-shaped cutting edge boss hits the rubber strip liner, it is embedded into the U-shaped groove together with the rubber strip liner. The longer side of the rubber strip liner is exposed in the U-shaped groove, thus completing the forming process of the rubber strip liner. 4) When the slider drives the punch device to reset and move, the arc-shaped cutting edge boss pushes the longer side of the rubber strip liner at the moment it exits the U-shaped groove, so that the formed rubber strip liner is automatically peeled off from the U-shaped groove.

7. The method for forming a door sealant liner for rail transit vehicles according to claim 3, characterized in that: In step four, the quality inspection process involves inspecting the appearance of the molded rubber strip lining and removing any burrs produced during cutting.

Images