Low-pressure injection mold capable of preventing cloth from wrinkling

Abstract

The utility model relates to the technical field of injection molds, and discloses a low-pressure injection mold capable of preventing cloth from wrinkling, which comprises a mold body and a pressing needle, a convex mold is connected to the mold body and matched with an automotive trim, rolling grooves are respectively connected to two sides of a corner of the convex mold, and a connecting shaft is rotatably connected in each rolling groove. A rolling wheel extending out of the male die is connected to the connecting shaft, a driving cavity and a containing groove are connected to the interior of the die body, the pressing needle penetrates through the die body and the driving cavity and is connected with a pressing plate at the containing groove, and a spring is connected between the pressing plate and the containing groove; and a driving assembly capable of driving the rollers on the two sides up and down through the pressing needle to reversely open the cloth towards the two sides is connected to the interior of the driving cavity. Compared with the prior art, the fabric flattening device has the advantages that fabric can be flattened automatically and conveniently, the fabric can be positioned conveniently, and damage to the fabric is avoided.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, specifically to a low-pressure injection mold for preventing fabric wrinkles. Background Technology

[0002] Before injection molding, the fabric needs to be placed in the low-pressure injection mold. During the mold closing process, one side of the fabric will abut against the pressure block. The pressure block, under the action of the spring at the bottom, will limit the fabric between the pressure block and the other side of the mold. The pressure block can be used to position the fabric on the flat surface. However, after the mold is closed, the fabric will accumulate at the corner of the mold, which will cause wrinkles. Usually, the wrinkles need to be unfolded and smoothed by hand, which is extremely labor-intensive and time-consuming and inefficient. Utility Model Content

[0003] I. Technical problems to be solved

[0004] The technical problem this invention aims to solve is that the fabric at the corners of the mold is prone to wrinkles, and manually unfolding and smoothing it is time-consuming, labor-intensive, and inefficient.

[0005] II. Technical Solution

[0006] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a low-pressure injection mold for preventing fabric wrinkles, comprising a mold body, a connecting rod, and a pressure block. The pressure block is connected to the top of the connecting rod. A punch is connected to the mold body. The punch mates with automotive interior trim. Roller grooves are connected to both sides of the corner of the punch. A connecting shaft is rotatably connected within the roller groove. Rollers extending from the punch are connected to the connecting shaft. A driving cavity and a receiving groove are connected within the mold body. The bottom end of the connecting rod passes through the mold body and the driving cavity and is connected to a pressure plate at the receiving groove. A spring is connected between the pressure plate and the receiving groove. A driving assembly is connected within the driving cavity, which can reverse the direction of the rollers on both sides by driving the pressure block up and down to spread the fabric to both sides.

[0007] Furthermore, the driving assembly includes a first gear sleeved on the connecting rod, a transmission component that can drive the first gear to rotate is connected to the connecting rod, a second gear is connected to one side of the connecting shaft, and a third gear is connected to the other side of the connecting shaft. The first gear, the second gear, and the third gear are all rotatably connected to the driving cavity. The second gear meshes with the first gear and the third gear respectively. As the pressure block drives the connecting rod downward, the pressure block drives the first gear to rotate forward through the transmission component. The first gear drives the second gear to rotate in the opposite direction through meshing with the second gear. The second gear drives the third gear to rotate forward through meshing with the third gear. The second gear and the third gear drive the rollers on both sides to rotate in the opposite direction, thereby facilitating the smoothing of the fabric folds at the corners to both sides through the rollers.

[0008] Furthermore, the transmission component includes a drive column connected to the connecting rod, a vertical groove is connected to the mold body, a drive groove is connected inside the first gear, the drive groove communicates with the vertical groove, the drive column cooperates with the vertical groove and the drive groove, the connecting rod can slide the pressure block downward through the cooperation of the drive column and the vertical groove, and when the drive column cooperates with the drive groove, it can drive the first gear to rotate.

[0009] Furthermore, the drive groove is provided through the inner wall of the first gear and has a spiral structure. Through the cooperation of the threaded groove and the drive column, as the pressure block and the connecting rod slide up and down, the connecting rod drives the first gear to rotate through the cooperation of the drive column and the threaded groove.

[0010] Furthermore, the groove is provided through the punch, the roller is provided with an anti-slip layer in the circumference, and the punch extends out of the roller through the groove, which facilitates the contact between the roller and the fabric. The anti-slip layer helps to increase the friction between the fabric and the roller, which facilitates the flattening and driving of the fabric.

[0011] Furthermore, the upper surface of the pressure block is higher than the upper surface of the punch, and there is a gap between the bottom end of the connecting rod and the bottom wall of the receiving groove. The length of the gap is less than the length of the pressure block extending out of the mold body, so as to allow for the pressure block to slide up and down.

[0012] III. Beneficial Effects

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] As the punch on the mold body and the die on the other side cooperate, the fabric can be positioned by the downward movement of the pressure block during the process of the die and punch cooperation. The spring can drive the pressure block to automatically adjust the fabric, avoiding damage to the fabric. At the same time, the pressure block drives the rollers on both sides to rotate in opposite directions through the drive component, which makes it easier to smooth the fabric and prevent the fabric from wrinkling at the corners. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a low-pressure injection mold for preventing wrinkles in fabric, according to this utility model.

[0016] Figure 2 This is a half-sectional structural diagram of a low-pressure injection mold for preventing fabric wrinkles, according to this utility model.

[0017] Figure 3 This is a partial cross-sectional view of a low-pressure injection mold for preventing wrinkles in fabric, according to this utility model.

[0018] Figure 4 yes Figure 3 A magnified structural diagram of A in the middle.

[0019] Figure 5This is a cross-sectional structural schematic diagram of a low-pressure injection mold for preventing wrinkles in fabric, according to this utility model.

[0020] As shown in the figure: 1. Mold body, 2. Pressure block, 3. Punch, 4. Roller groove, 5. Connecting shaft, 6. Roller, 7. Drive cavity, 8. Receiving groove, 9. Spring, 10. First gear, 11. Second gear, 12. Third gear, 13. Drive column, 14. Vertical groove, 15. Drive groove, 16. Pressure block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Example 1

[0023] Combined with appendix Figure 1 A low-pressure injection mold for preventing wrinkles in fabric includes a mold body 1, a connecting rod 2, and a pressure block 16. The top end of the connecting rod 2 is connected to the pressure block 16. A punch 3 is connected to the mold body 1, and the punch 3 mates with automotive interior trim. A driving cavity 7 and a receiving groove 8 are connected inside the mold body 1. The bottom end of the connecting rod 2 passes through the mold body 1 and the driving cavity 7 and is connected to a pressure plate at the receiving groove 8. The upper surface of the pressure block 16 is higher than the upper surface of the punch 3. A gap is provided between the bottom end of the connecting rod 2 and the bottom wall of the receiving groove 8. The length of the gap is less than the length of the pressure block extending out of the mold body 1. A spring 9 is connected between the pressure plate and the receiving groove 8.

[0024] The arrangement of the pressure block 16, connecting rod 2, and spring 9 in the above structure facilitates the pressure block 16 to press and position the fabric, increases the contact area with the fabric, and avoids damage caused by penetrating the fabric. The spring 9 can elastically adjust the connecting rod 2.

[0025] Example 2

[0026] Based on Example 1, and in conjunction with Appendix Figure 1 The punch 3 has a roller groove 4 connected to both sides of the corner. A connecting shaft 5 is rotatably connected in the roller groove 4. A roller 6 extending out of the punch 3 is connected on the connecting shaft 5. The roller groove 4 passes through the punch 3. The roller 6 has an anti-slip layer around its circumference and extends out of the punch 3 through the roller groove 4.

[0027] In the above structure, the roller 6 can extend into the groove 4 and abut against the fabric folds at the corner.

[0028] Combined with appendix Figure 1 The drive cavity 7 is connected to a drive assembly that can drive the rollers 6 on both sides of the connecting rod 2 to spread the fabric to both sides in opposite directions. The drive assembly includes a first gear 10 sleeved on the connecting rod 2. A transmission component that can drive the first gear 10 to rotate is connected to the connecting rod 2. The transmission component includes a drive column 13 connected to the connecting rod 2. A vertical groove 14 is connected to the mold body 1. A drive groove 15 is connected inside the first gear 10. The drive groove 15 is set through the inner wall of the first gear 10. The drive groove 15 has a spiral structure and communicates with the vertical groove 14. The drive column 13 cooperates with the vertical groove 14 and the drive groove 15. A second gear 11 is connected to one side of the connecting shaft 5, and a third gear 12 is connected to the other side of the connecting shaft 5. The first gear 10, the second gear 11 and the third gear 12 are all rotatably connected to the drive cavity 7. The second gear 11 meshes with the first gear 10 and the third gear 12 respectively.

[0029] The transmission component in the above structure drives the first gear 10 to rotate, the first gear 10 drives the second gear 11 to drive the roller 6 on one side to reverse, the second gear 11 drives the third gear 12 to drive the roller 6 on the other side to reverse, and the reverse rotation of the two rollers 6 can flatten the wrinkles in the fabric.

[0030] The specific usage method is as follows:

[0031] The fabric is attached to the cavity mold, and the fabric is attached to the outside of the cavity on all four sides. The pressure block 16 presses the fabric on the outside of the injection cavity to position the fabric on all four sides. By driving the punch 3 to move towards the cavity mold, the pressure block 16 first abuts against the fabric on the cavity circumference (that is, the edge of the fabric). The pressure block 16 can position the fabric. As the punch 3 on the mold body 1 and the cavity mold on the other side continue to cooperate, the fabric adheres to the punch 3. The fabric first contacts the top surface of the punch 3. As the punch 3 continues to move, it pushes the fabric towards the cavity, so that the fabric on all four sides adheres to the vertical surface of the punch 3. The gap length is less than the length of the pressure block 16 extending out of the mold body 1, so as to leave room for the up and down sliding of the pressure block 16 and avoid damage to the fabric. The spring 9 can drive the pressure block 16 to automatically adjust the fabric, and the contact area between the pressure block 16 and the fabric is large, avoiding direct penetration of the fabric and causing damage.

[0032] Simultaneously, the pressure block 16 drives the rollers 6 on both sides to rotate in opposite directions via the drive assembly. As the pressure block 16 drives the connecting rod 2 downward, the connecting rod 2 can drive the pressure block 16 to slide downward through the cooperation of the drive column 13 and the vertical groove 14. The connecting rod 2 drives the first gear 10 to rotate in the forward direction through the transmission component. When the drive column 13 cooperates with the threaded groove, it drives the first gear 10 to rotate. The first gear 10 drives the second gear 11 to rotate in the reverse direction through meshing with the second gear 11. The second gear 11 drives the third gear 12 to rotate in the forward direction through meshing with the third gear 12. The second gear 11 and the third gear 12 drive the rollers 6 on both sides to rotate in opposite directions. The rollers 6 extend out of the punch 3 through the through-hole of the rolling groove 4, which facilitates the smoothing of the fabric wrinkles at the corners by the rollers 6 contacting the fabric. The anti-slip layer helps to increase the friction between the fabric and the rollers 6, making it easier to smooth the fabric and prevent the fabric from wrinkling at the corners.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0035] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A low-pressure injection mold for preventing wrinkles in fabric, comprising a mold body (1), a connecting rod (2), and a pressure block (16), wherein the top end of the connecting rod (2) is connected to the pressure block (16), and a punch (3) is connected to the mold body (1), the punch (3) cooperating with automotive interior trim, characterized in that: The punch (3) has two roller grooves (4) connected to its corners. A connecting shaft (5) is rotatably connected inside the roller groove (4). A roller (6) extending out of the punch (3) is connected to the connecting shaft (5). A drive cavity (7) and a receiving groove (8) are connected inside the mold body (1). The bottom end of the connecting rod (2) passes through the mold body (1) and the drive groove (15) and is connected to a pressure plate at the receiving groove (8). A spring (9) is connected between the pressure plate and the receiving groove (8). A drive assembly is connected inside the drive groove (15) so that the fabric can be pushed to both sides by the upper and lower drive rollers (6) of the pressure block (16).

2. The low-pressure injection mold for preventing wrinkles in fabric according to claim 1, characterized in that: The drive assembly includes a first gear (10) sleeved on the connecting rod (2). A transmission component capable of driving the first gear (10) to rotate is connected to the connecting rod (2). A second gear (11) is connected to one side of the connecting shaft (5), and a third gear (12) is connected to the other side of the connecting shaft (5). The first gear (10), the second gear (11), and the third gear (12) are all rotatably connected to the drive cavity (7). The second gear (11) meshes with the first gear (10) and the third gear (12) respectively.

3. The low-pressure injection mold for preventing wrinkles in fabric according to claim 2, characterized in that: The transmission component includes a drive column (13) connected to the connecting rod (2), a vertical groove (14) is connected to the mold body (1), and an inclined drive groove (15) is connected inside the first gear (10). The drive groove (15) communicates with the vertical groove (14), and the drive column (13) cooperates with the vertical groove (14) and the drive groove (15).

4. A low-pressure injection mold for preventing wrinkles in fabric according to claim 3, characterized in that: The drive groove (15) is provided through the inner wall of the first gear (10), and the drive groove (15) has a spiral structure.

5. A low-pressure injection mold for preventing wrinkles in fabric according to claim 1, characterized in that: The groove (4) is provided to penetrate the punch (3) downwards, and the roller (6) is provided with an anti-slip layer in the circumference and the roller (6) extends out of the punch (3) through the groove (4).

6. A low-pressure injection mold for preventing wrinkles in fabric according to claim 1, characterized in that: The upper surface of the pressure block (16) is higher than the upper surface of the punch (3), and there is a gap between the bottom end of the connecting rod (2) and the bottom wall of the receiving groove (8). The length of the gap is less than the length of the pressure block (16) extending out of the mold body (1).

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