A mold for a turn-up forming process

Abstract

The application discloses a mold for a reverse wrapping forming process, comprising a fixed mold, a movable mold and a sliding knife, the sliding knife is elastically vertically slidingly installed at the bottom end of the fixed mold and is in a horizontal state; before cutting, the end part of the fabric and the plate to be wrapped is respectively located at the top end and the bottom end of the sliding knife; when the mold is closed for cutting, the fixed mold cooperates with the sharp knife edge at the top end of the sliding knife to cut the fabric, and the movable mold cooperates with the shearing knife edge at the end of the sliding knife to cut the plate. The beneficial effects of the application are as follows: by arranging a sliding knife in the mold, the end part of the fabric and the plate to be wrapped is respectively located at the top end and the bottom end of the sliding knife, when the mold is closed, the fixed mold cooperates with the sliding knife to cut the fabric, and the movable mold cooperates with the sliding knife to cut the plate, and the cutting positions of the two are different, so that the fabric and the plate with different long and short sizes can be obtained, and subsequent fabric and plate step-by-step cutting processes are not needed, and the production efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of mold technology, and in particular to a mold for a reverse wrapping molding process. Background Technology

[0002] like Figure 1 The diagram shows a schematic of an automotive component structure. To enhance the comfort and premium feel of the car's interior, automotive components are typically covered with fabric. Between the fabric and the component is a fiberglass sheet (i.e., glass fiberboard). This requires a reverse-wrapping process: the fabric is "reverse-wrapped" (also called "covering" or "rolling edges"), causing its edges to curl inwards and secure to the back or interior of the component (e.g., ...). Figure 2 As shown in the image, its core advantage is that it hides the raw edges of the fabric and the fixed seams.

[0003] In the reverse-wrapping molding process, a cutting process is required. It should be noted that, for example... Figure 2 As shown, the length of the outermost fabric layer must be greater than the length of the fiberglass board; however, the existing cutting process requires cutting one layer in the mold before proceeding with the subsequent wrapping process. In other words, the existing molding process requires step-by-step cutting of the two layers, thus affecting production efficiency. Therefore, a mold for the reverse wrapping molding process is proposed to solve the above technical problems. Utility Model Content

[0004] One of the objectives of this application is to provide a rapid cutting die for a reverse wrapping molding process.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: a mold for a reverse wrapping molding process, comprising a fixed mold, a moving mold, and a sliding cutter, wherein the sliding cutter is elastically and vertically slidably installed at the bottom end of the fixed mold and is in a horizontal state; before cutting, the ends of the fabric and the sheet to be wrapped are located at the top and bottom ends of the sliding cutter, respectively; during mold closing and cutting, the fixed mold cooperates with the pointed blade at the top of the sliding cutter to cut the fabric, and the moving mold cooperates with the shearing blade at the end of the sliding cutter to cut the sheet.

[0006] Preferably, the fabric is a single-layer structure, and the board is a single-layer or multi-layer structure.

[0007] Preferably, a cutter holder is vertically slidably mounted on the bottom end of the fixed mold, and the cutter holder is connected to the fixed mold via an elastic element; the sliding cutter is horizontally slidably mounted on the cutter holder; the mold further includes a driving device, the output end of which is connected to the sliding cutter; before the fabric is placed in the cavity of the mold, the driving device is adapted to drive the sliding cutter to move horizontally and away from the cavity; after the fabric is placed in the cavity, the driving device is adapted to drive the sliding cutter to move and reset, thereby separating the fabric and the sheet material.

[0008] Preferably, the driving device includes a return spring, a first cylinder, and an air source. The slide cutter and the tool holder are connected by the return spring. The first cylinder is horizontally mounted on the tool holder, and one end of its piston rod is connected to the slide cutter. The air source is located on the fixed mold and communicates with the first cylinder. When the slide cutter retracts, the air source is adapted to draw air into the first cylinder, thereby driving the slide cutter to move. When the slide cutter resets, the air source and the first cylinder are connected to the outside, and the slide cutter is adapted to move and reset under the drive of the return spring.

[0009] Preferably, the air source includes a second cylinder and a solenoid valve. The second cylinder is installed on the fixed mold and its output end is connected to the cutter holder. The solenoid valve is located outside the cylinder body of the second cylinder. The first cylinder is connected to the second cylinder. The elastic force of the elastic element is greater than the elastic force of the return spring. When the mold is opened, the cutter holder is adapted to move downward and reset under the action of the elastic element, thereby causing the second cylinder to extend and evacuate air from the first cylinder to reset the sliding cutter. After the fabric is placed in the cavity, the solenoid valve is adapted to open so that the second cylinder and the first cylinder are connected to the outside.

[0010] Preferably, a positioning structure is provided between the sliding cutter and the moving mold; during mold closing and cutting, the moving mold is adapted to lock the sliding cutter through the positioning structure.

[0011] Preferably, the positioning structure includes a positioning groove and a positioning block; the positioning block is disposed within the moving mold, and the positioning groove is disposed at the bottom end of the slide cutter; or the positioning groove is disposed within the moving mold, and the positioning block is disposed at the bottom end of the slide cutter; during mold closing, the positioning block cooperates with the positioning groove to achieve limiting and locking of the slide cutter.

[0012] Preferably, the elastic element is a nitrogen spring, and guide posts are vertically installed through the four corners of the tool holder. The guide posts are fixedly installed on the fixed mold and slide in cooperation with the tool holder. Limiting bolts are installed through both sides of the top of the tool holder. The limiting bolts are installed on the fixed mold and are suitable for limiting the tool holder.

[0013] Preferably, an upper waste area for collecting the cut fabric is provided between the top of the slide cutter and the fixed mold; a lower waste area for collecting the cut sheet is provided between the bottom of the slide cutter and the moving mold.

[0014] Preferably, the driving device is a hydraulic cylinder or a pneumatic cylinder, and the driving device is adapted to drive the slide knife to move by means of a telescopic action.

[0015] Compared with the prior art, the beneficial effects of this application are as follows: This invention features a sliding cutter within the mold, positioning the ends of the fabric and sheet to be covered at the top and bottom of the cutter, respectively. During mold closing, the fixed mold and the sliding cutter work together to cut the fabric, while the moving mold and the sliding cutter work together to cut the sheet. Since the cutting positions of the two are different, fabrics and sheets of different lengths can be obtained, eliminating the need for subsequent step-by-step cutting processes and greatly improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the layer distribution of the existing product.

[0017] Figure 2 This is a schematic diagram of the inverted wrapping structure at the edge of an existing product.

[0018] Figure 3 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the retracted state of the sliding knife when the fabric and sheet are placed into the cavity according to this utility model.

[0020] Figure 5 This is a schematic diagram showing the extended state of the slide knife when the fabric and sheet are placed into the cavity according to this utility model.

[0021] Figure 6 This is a schematic diagram of the mold in the closed state of this utility model.

[0022] Figure 7 This is an enlarged structural diagram of point A of this utility model.

[0023] Figure 8 This is a schematic diagram of the specific structure of the slide bar of this utility model.

[0024] Figure 9This is a schematic diagram of the first embodiment of the driving device of this utility model.

[0025] Figure 10 This is a schematic diagram of the second embodiment of the driving device of this utility model.

[0026] Figure 11 This is a schematic diagram of the initial retracted state of the slide blade of this utility model.

[0027] Figure 12 This is a schematic diagram illustrating the principle of the slide bar extension of this utility model.

[0028] Figure 13 This is a schematic diagram illustrating the principle of the tool holder moving upwards during mold closing in this utility model.

[0029] In the diagram: 1. Product; 2. Sheet metal; 3. Fabric; 4. Mold; 401. Fixed mold; 402. Moving mold; 5. Ejector mechanism; 6. Sliding knife; 601. Pointed blade; 602. Shearing blade; 7. Drive unit; 8. Tool holder; 9. Guide post; 10. Limit bolt; 11. Nitrogen spring; 12. Return spring; 13. First cylinder; 1301. First cylinder body; 1302. First piston rod; 14. Second cylinder; 1401. Second cylinder body; 1402. Second piston rod; 1403. Solenoid valve; 15. Air pipe; 16. Positioning groove; 17. Positioning block. Detailed Implementation

[0030] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0031] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and 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, and should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] Further analysis reveals shortcomings in the cutting process of the outer packaging material in the existing reverse-wrapping molding process: During the cutting of fabric 3 and sheet 2, if they are stacked together and placed into the cavity of the cutting mold 4, the cutting lengths of both are the same under the action of the cutter. This is clearly inconsistent with the requirements of the subsequent outer packaging molding of product 1 (i.e., automotive parts). Therefore, it is necessary to cut the two types of fabric 3 separately, or cut sheet 2 and fabric 3 to the same length and then trim them to meet the actual outer packaging requirements of product 1. However, this step-by-step cutting method undoubtedly increases the production process and reduces production efficiency. It should be noted that fabric 3 can be made of genuine leather, synthetic leather, textile fabric, or other flexible materials; sheet 2 is preferably made of fiberglass board, which can effectively support and protect the internal structure of product 1.

[0034] Therefore, the inventors of this application have developed a reverse-wrapping molding process for automotive parts, mainly targeting the cutting process in the reverse-wrapping process, one embodiment of which is as follows: Figures 1 to 13 As shown, it includes the following steps: S100: Place the stacked fabric 3 and sheet 2 into the cavity of mold 4; S200: Position the end of fabric 3 to be covered at the top of the sliding blade 6 inside mold 4, and position the end of sheet 2 to be covered at the bottom of the sliding blade 6 inside mold 4. The areas not to be covered do not require different cutting lengths; they simply correspond to the cutting edges within mold 4. S300: Mold 4 closes to cut the two materials, such as... Figure 7 As shown, the fixed mold 401 works with the sliding blade 6 to cut the fabric 3, and the moving mold 402 works with the sliding blade 6 to cut the sheet material 2. The cutting positions of the two are different, thus obtaining fabric 3 and sheet material 2 of different lengths. S400: The cut fabric 3 and sheet material 2 are then folded and covered with the product 1 at the edges.

[0035] Therefore, it can be seen that the above-described cutting process allows for the simultaneous cutting of two materials with only one forming process, thereby improving production efficiency. Furthermore, since the cutting process is completed synchronously during the mold closing process of mold 4, the precision and consistency of the cut fabric 3 and sheet 2 can be guaranteed, improving the quality of product 1.

[0036] Of course, in the actual cutting process, there may be many layers of material to be covered. We can divide them into two types according to length. The first type is the outermost fabric layer 3, which is the longest because it serves as the folding and covering function, extending to the edge of the part and being fixed. Therefore, fabric layer 3 is a single-layer structure. The second type is the sheet material layer 2 located between fabric layer 3 and product 1 (i.e., the automotive part). It is slightly shorter and only needs to be attached to the outer surface of the part. Therefore, sheet material layer 2 can be a single-layer structure or a multi-layer structure.

[0037] It is worth mentioning that since the fabric 3 is located at the top of the slide knife 6 and the sheet 2 is located at the bottom of the slide knife 6, during the mold closing and cutting process, the slide knife 6 will cut the sheet 2 from top to bottom and the fabric 3 from bottom to top. In other words, the cutting processes of the two are independent of each other. During the entire cutting process, the slide knife 6 will not interfere with each other at its respective cutting position, thus ensuring the cutting quality.

[0038] It should be understood that, in general design by those skilled in the art, two cutting edges with different positions and depths are simultaneously provided at the top of the slide cutter 6. The fabric 3 and the sheet 2 are then stacked at the top of the slide cutter 6. During mold closing, different cutting edges are used to cut different materials, and the cutting method is always from bottom to top (or vice versa). In other words, the cutting methods are the same for both. For example, the first cutting edge only cuts the bottom sheet 2, while the second cutting edge cuts both the sheet 2 and the fabric 3 simultaneously, resulting in two different lengths. However, since the fabric 3 and the sheet 2 are flexible materials with a certain degree of compressibility, ensuring that the first cutting edge only cuts to the boundary between the sheet 2 and the fabric 3 without affecting the fabric 3 is very difficult to control and achieve. Therefore, this application uses a single slide cutter 6 and different cutting methods to achieve simultaneous cutting of the two materials, not only avoiding the above problems but also improving the accuracy and efficiency of the cutting process.

[0039] Furthermore, the molding process in step S300 may also include the following steps: placing the product 1 to be covered below the plate 2 and inside the cavity of the mold 4, then filling the spaces between the layers with an adhesive (such as epoxy resin and curing agent), and applying a certain pressure and temperature to the mold 4 to complete the molding and curing of the fabric 3, plate 2 and product 1 to form an integrated structure, that is, performing a three-in-one process on the three and completing the material cutting process at the same time. In this way, during the subsequent mold opening process of product 1, only the outermost fabric 3 needs to be coated with colloid, and then the reverse wrapping molding can be performed quickly.

[0040] Other examples Figure 3 As shown, an ejector mechanism 5 can also be provided within the moving mold 402. That is, after the mold opens, the molded and sheared automotive parts can be ejected through the ejector mechanism 5 for subsequent removal. The ejector mechanism 5 is a conventional structure within the mold 4, so its principle and structure will not be described in detail.

[0041] Another aspect of this application provides a mold 4 for realizing the above-mentioned reverse-wrapping molding process of automotive parts. The mold 4 includes a fixed mold 401, a moving mold 402 and a slide cutter 6. The slide cutter 6 is elastically and vertically slidably installed at the bottom end of the fixed mold 401 and is in a horizontal state.

[0042] It is understandable that, such as Figure 5 As shown, fabric 3 and sheet 2 are placed inside the cavity of mold 4, with fabric 3 positioned at the top of slide bar 6 and sheet 2 positioned at the bottom of slide bar 6. Then the mold is closed, as shown. Figure 6 and Figure 7 As shown, since the slide cutter 6 is elastically installed, it can float in the vertical direction, meaning that the slide cutter 6 will not interfere with the mold closing of the mold 4. After mold closing, the sheet metal 2 will abut against the moving mold 402, and the fabric 3 will abut against the fixed mold 401, with both sheet metal 2 and fabric 3 abutting against each other. When the moving mold 402 moves upward towards the fixed mold 401, it is equivalent to the shearing blade 602 at the end of the slide cutter 6 (left) cutting the sheet metal 2 from top to bottom. When the slide cutter 6 abuts against the moving mold 402, the slide cutter 6 will continue to move upward with the moving mold 402, causing the sharp blade 601 at the top of the slide cutter 6 to cut the fabric 3 from bottom to top, thus completing the cutting process of the fabric 3 and sheet metal 2 during mold closing.

[0043] Of course, the specific timing of the cut can be set according to the positions of the pointed blade 601 and the shearing blade 602 on the slide blade 6. For example: Figure 7 As shown, since the sliding blade 6 is located between the fabric 3 and the board 2 before cutting, therefore... Figure 8 As shown, the thickness of the shearing blade 602 can be set very thin, and the depth of the pointed blade 601 can be set very shallow. Thus, when the moving mold 402 and the fixed mold 401 are about to close, the sliding blade 6 can perform a synchronous cutting process on both. The main advantage of this is that the fabric 3 and the sheet 2 are basically in a mold-closed state at this time, so there will be no deviation during cutting, which improves the stability and accuracy of cutting.

[0044] We know that because fabric 3 is a flexible material, the sliding blade 6 will have a certain impact on it when it is initially laid flat. Therefore, in this embodiment, as... Figure 9 and Figure 10As shown, a tool holder 8 is vertically slidably mounted on the bottom end of the fixed mold 401, and the tool holder 8 is connected to the fixed mold 401 by an elastic element (such as a nitrogen spring 11). The slide knife 6 is horizontally slidably mounted on the tool holder 8. The mold 4 also includes a drive device 7, and the output end of the drive device 7 is connected to the slide knife 6.

[0045] Understandably, before the fabric 3 is placed in the cavity of the mold 4, the driving device 7 can drive the slide bar 6 to move horizontally and away from the cavity, i.e., the retraction process of the slide bar 6 (such as...). Figure 4 (As shown). After the fabric 3 is placed in the cavity, the drive device 7 can drive the slide knife 6 to move and reset, that is, the extension process of the slide knife 6 (as shown). Figure 5 As shown), this causes the fabric 3 and the board 2 to separate at their ends.

[0046] This application does not specifically limit the structure of the drive device 7, but the following specific embodiment is provided for reference: Structure 1: such as Figure 9 As shown, the specific structure and working principle of the drive device 7 are well-known to those skilled in the art, and therefore will not be described in detail here. Common drive devices 7 include hydraulic cylinders, pneumatic cylinders, and linear motors, etc., and those skilled in the art can choose according to actual needs. That is, the movement of the slide cutter 6 is controlled entirely by the extension and retraction of the drive device 7.

[0047] Structure 2: The drive device 7 includes a return spring 12, a first cylinder 13 and an air source. The slide knife 6 and the tool holder 8 are connected by the return spring 12. The first cylinder 13 is horizontally installed on the tool holder 8 and one end of the piston rod is connected to the slide knife 6. The air source is set in the fixed mold 401 and communicates with the first cylinder 13.

[0048] Specifically, such as Figure 11 As shown, the first cylinder 13 includes a first cylinder body 1301 and a first piston rod 1302, with the first piston rod 1302 slidably and sealed within the first cylinder body 1301. When the slide blade 6 retracts, the air source can draw air into the first cylinder body 1301, which in turn drives the slide blade 6 to retract and move via the first piston rod 1302. At this time, the return spring 12 is in a compressed and stored state. When the slide blade 6 needs to be reset, the air source and the first cylinder body 1301 are connected to the outside, and the slide blade 6 will move and reset under the action of the return spring 12.

[0049] It should be noted that the coordination of the first cylinder 13, the air source, and the return spring 12 at this time is similar to the principle of the single-acting cylinder in structure one. That is, the shortening action in the first cylinder 13 is achieved by the air extraction action, while the extension and reset is achieved by the elastic force of the return spring 12.

[0050] As a further description of the above embodiments: such as Figure 11 As shown, the air source includes a second cylinder 14 and a solenoid valve 1403. Specifically, the second cylinder 14 includes a second cylinder body 1401 and a second piston rod 1402, with the second piston rod 1402 slidably and sealed within the second cylinder body 1401. The second cylinder body 1401 is vertically fixedly mounted on the fixed mold 401, while the second piston rod 1402 is mounted on the tool holder 8. The solenoid valve 1403 is located outside the second cylinder body 1401, thereby enabling the connection and disconnection between the second cylinder body 1401 and the outside world. The first cylinder body 1301 and the second cylinder body 1401 are connected by an air pipe 15, and the elastic force of the elastic element is greater than the elastic force of the return spring 12.

[0051] To facilitate understanding of its operation process, its working principle is described in detail below: ① Figure 11 As shown, let's assume this is the initial state: the slide cutter 6 is in a retracted state, the tool holder 8 is also away from the fixed mold 401, the nitrogen spring 11 is not compressed, and the return spring 12 is in a compressed state. ② As shown Figure 12 As shown, the slide cutter 6 extends. At this time, simply open the solenoid valve 1403, thereby connecting the second cylinder 1401 with the outside. Since the first cylinder 1301 and the second cylinder 1401 are connected, the first piston rod 1302 loses the air pressure force and extends under the action of the return spring 12. ③ During mold closing, the solenoid valve 1403 remains open, and the cutter holder 8 moves upward under the mold closing force, thereby driving the second piston rod 1402 to move upward along the inside of the second cylinder 1401. At this time, the nitrogen spring 11 is in a compressed and stored state. Subsequently, the solenoid valve 1403 closes, that is, the first cylinder 1301 and the second cylinder 1401 are isolated from the outside. ④ After mold opening, the tool holder 8 moves downward under the action of the nitrogen spring 11, that is, the second piston rod 1402 moves downward, which reduces the pressure in the second cylinder 1401. This is equivalent to evacuating the air from the first cylinder 1301. Since the elastic force of the return spring 12 is less than that of the nitrogen spring 11, the first piston rod 1302 will drive the slide knife 6 to retract under the action of air pressure, and then return to the initial state (e.g., Figure 11 (As shown).

[0052] Therefore, it can be seen that Structure 1 uses the direct extension and retraction of the drive source to move the slide cutter 6. This typically involves a pneumatic cylinder in the mold 4, requiring an external air pump or similar device for drive. Structure 2, on the other hand, uses the reset of the tool holder 8 combined with pneumatic pressure to drive the reset of the slide cutter 6. This eliminates the need for an external drive source; the entire process only requires controlling the opening and closing of the solenoid valve 1403, reducing the cost of the mold 4. Both structures can meet the requirements, and those skilled in the art can choose according to the specific circumstances.

[0053] In this embodiment, to further improve stability during cutting, such as Figure 7 As shown, a positioning structure can be provided between the slide cutter 6 and the moving mold 402. The positioning structure includes a positioning groove 16 and a positioning block 17. The positioning groove 16 is located at the bottom end of the slide cutter 6, and the positioning block 17 is located inside the moving mold 402; or the positioning block 17 is located at the bottom end of the slide cutter 6, and the positioning groove 16 is located inside the moving mold 402. It can be understood that during mold closing, the positioning block 17 and the positioning groove 16 will engage to lock the position of the slide cutter 6, thereby preventing the slide cutter 6 from shifting during cutting.

[0054] Furthermore, such as Figure 7 As shown, during mold closing and cutting, an upper waste area is left between the top of the slide knife 6 and the fixed mold 401 to collect the cut fabric 3; a lower waste area is left between the bottom of the slide knife 6 and the moving mold 402 to collect the cut sheet 2, thus facilitating the collection and processing of waste from the fabric 3 and the sheet 2.

[0055] like Figure 9 As shown, the specific installation method of the tool holder 8 is as follows: guide posts 9 are vertically installed through the four corners of the tool holder 8. The guide posts 9 are fixedly installed on the fixed mold 401 and slide in cooperation with the tool holder 8. Limiting bolts 10 are installed through both sides of the top of the tool holder 8. The limiting bolts 10 are installed on the fixed mold 401 and are suitable for limiting the tool holder 8. The limiting bolts 10 limit the vertical movement distance of the tool holder 8 to prevent the tool holder 8 from deviating or moving excessively during the movement. The cooperation of the guide posts 9 and the limiting bolts 10 ensures the stable sliding of the tool holder 8 in the vertical direction, thereby indirectly ensuring the stability and accuracy of the sliding cutter 6 during the extension and retraction process.

[0056] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A mold for a reverse wrapping molding process, characterized in that, include: The components include a fixed mold, a moving mold, and a sliding cutter, wherein the sliding cutter is elastically and vertically slidably mounted at the bottom end of the fixed mold and is in a horizontal state. Before cutting, the ends of the fabric and the sheet to be covered are located at the top and bottom of the slide blade, respectively. During die-cutting, the fixed mold cooperates with the pointed blade at the top of the slide blade to cut the fabric, and the moving mold cooperates with the shearing blade at the end of the slide blade to cut the sheet.

2. The mold for the reverse wrapping molding process as described in claim 1, characterized in that: The fabric has a single-layer structure, and the board has a single-layer or multi-layer structure.

3. The mold for the reverse wrapping molding process as described in claim 1, characterized in that: A tool holder is vertically and slidably mounted on the bottom end of the fixed mold, and the tool holder is connected to the fixed mold through an elastic element. The sliding cutter is horizontally and slidably mounted on the tool holder. The mold also includes a driving device, the output end of which is connected to the sliding cutter. Before the fabric is placed in the cavity of the mold, the driving device is adapted to drive the slide knife to move horizontally and away from the cavity; After the fabric is placed in the cavity, the driving device is adapted to drive the slide knife to move and reset, thereby separating the fabric and the sheet.

4. The mold for the reverse wrapping molding process as described in claim 3, characterized in that: The driving device includes a return spring, a first cylinder, and an air source. The slide cutter and the tool holder are connected by the return spring. The first cylinder is horizontally mounted on the tool holder and one end of its piston rod is connected to the slide cutter. The air source is located in the fixed mold and communicates with the first cylinder. When the slide bar retracts, the air source is adapted to draw air into the first cylinder, thereby driving the slide bar to move; when the slide bar resets, the air source and the first cylinder are connected to the outside, and the slide bar is adapted to move and reset under the drive of the reset spring.

5. The mold for the reverse wrapping molding process as described in claim 4, characterized in that: The air source includes a second cylinder and a solenoid valve. The second cylinder is installed on the fixed mold and its output end is connected to the tool holder. The solenoid valve is located outside the cylinder body of the second cylinder. The first cylinder is connected to the second cylinder. The elastic force of the elastic element is greater than the elastic force of the return spring. During mold opening, the cutter holder is adapted to move downward and reset under the action of the elastic element, thereby causing the second cylinder to extend and evacuate the air from the first cylinder to reset the slide cutter; after the fabric is placed in the cavity, the solenoid valve is adapted to open so that the second cylinder and the first cylinder can communicate with the outside.

6. The mold for the reverse wrapping molding process as described in any one of claims 1-5, characterized in that: A positioning structure is provided between the sliding cutter and the moving mold; during mold closing and cutting, the moving mold is adapted to lock the sliding cutter through the positioning structure.

7. The mold for the reverse wrapping molding process as described in claim 6, characterized in that: The positioning structure includes a positioning groove and a positioning block; the positioning block is disposed within the moving mold, and the positioning groove is disposed at the bottom end of the slide cutter; or the positioning groove is disposed within the moving mold, and the positioning block is disposed at the bottom end of the slide cutter; during mold closing, the positioning block cooperates with the positioning groove to achieve limiting and locking of the slide cutter.

8. The mold for the reverse wrapping molding process as described in claim 3, characterized in that: The elastic element is a nitrogen spring. Guide posts are vertically installed through the four corners of the tool holder. The guide posts are fixedly installed on the fixed mold and slide in cooperation with the tool holder. Limiting bolts are installed through both sides of the top of the tool holder. The limiting bolts are installed on the fixed mold and are suitable for limiting the tool holder.

9. The mold for the reverse wrapping molding process as described in claim 1, characterized in that: An upper waste area for collecting the cut fabric is provided between the top of the sliding cutter and the fixed mold; a lower waste area for collecting the cut sheet is provided between the bottom of the sliding cutter and the moving mold.

10. The mold for the reverse wrapping molding process as described in claim 3, characterized in that: The driving device is a hydraulic cylinder or a pneumatic cylinder, and the driving device is adapted to drive the slide knife to move by means of extension and retraction.

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