Die material pressing structure
By setting the internal pressure block in the mold pressure structure, the positioning and pre -pressure of the auxiliary material board solves the problem of effective use of small and high costs for the effective use of acoustic packaging materials, and realize the efficient use of materials and the savings of production costs.
Patent Information
- Application Number
- CN202411824977.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-01-24
AI Technical Summary
In the prior art, the effective utilization area of acoustic packaging molding materials accounts for a small proportion, resulting in the material plate having to reserve a pre-pressure surface of the mold clamping surface and the pressing frame, which increases production costs.
The mold pressure structure is used to set the built -in material block to assist the positioning and pre -pressure of the material board. The intervals of the siege block can fix the material board with the bracket surface of the bottom mold to avoid the surface folds.
The material area of the four -week edge of the material board is reduced, saving production costs, and effectively preventing problems such as folding surface during hot pressure.
Smart Images
Figure CN119348117A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of acoustic bag manufacturing, and in particular to a mold pressing structure. Background Art
[0002] In the field of new energy vehicles, in order to improve the NVH (noise, vibration and harshness) performance of the vehicle, it is generally necessary to use an acoustic package to wrap the motor drive assembly, thereby reducing the noise transmitted to the car by the vehicle electric drive system. The manufacturing material of the acoustic package is a soft sheet made of a PU layer, an EVA layer and a non-woven fabric layer. The material plate is formed by hot pressing with a mold so that it can fit the electric drive assembly. When the mold in the prior art hot presses the material plate, the material plate is usually laid flat on the lower mold first, and then the pressing frame is used to press the material surface near the edges of the material plate to make the position between the material plate and the lower mold relatively fixed. The molding area of the acoustic package reserved on the material plate is all located within the frame area of the pressing frame, and finally the upper and lower molds are closed to complete the hot pressing. This scheme requires that the material plate must reserve the pre-pressing surface of the closing surface and the pressing frame at the same time, that is, the edge of the material surface of the material plate needs to extend beyond the frame area of the pressing frame. Therefore, the effective utilization area of the material plate used to form the acoustic package in this scheme accounts for a small proportion, and the cost of large-scale batch production is relatively high. Summary of the invention
[0003] The purpose of the present invention is to provide a mold pressing structure, which can realize pre-pressing of acoustic bag molding materials to prevent wrinkles on the material surface and save production materials.
[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a mold pressing structure, a pressing block and an upper forming area are arranged on the upper mold, the pressing block is located in the upper forming area or is arranged at intervals on the outside of the contour edge of the adjacent upper forming area, the pressing block in the upper forming area is movably connected to the upper mold and its extension direction is consistent with the clamping direction of the upper mold, and the bottom surface of the pressing block is in fit with the shape of the corresponding part of the supporting surface of the lower mold for laying the material plate to be processed.
[0005] The present invention mainly sets a built-in pressing block to assist in positioning the material plate to be hot-pressed. The pressing block located in the forming area can pre-press the material plate before the upper mold is closed. The pressing block arranged at intervals on the outer side of the contour edge adjacent to the forming area can fix the material plate with the supporting surface of the lower mold to avoid wrinkles on the material surface during hot pressing. Compared with the traditional pressing frame, the setting of the pressing block can reduce the material area around the edges of the material plate, saving production costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0006] Figure 1 Isometric view after hiding the upper mold for the mold pressing structure;
[0007] Figure 2Schematic diagram of the material blocking rack;
[0008] Figure 3 for Figure 1 A partial enlarged view of
[0009] Figure 4 It is a schematic diagram of the pressing block and the supporting block in the forming area. DETAILED DESCRIPTION
[0010] See also Figures 1 to 4 In the mold pressing structure shown, a pressing block 10 and an upper forming area A are provided on the upper mold 1. The pressing block 10 is located in the upper forming area A or is arranged at intervals on the outside of the contour edge of the adjacent upper forming area A. The pressing block 10 in the upper forming area A is movably connected to the upper mold 1 and its extension direction is consistent with the clamping direction of the upper mold 1. The bottom surface of the pressing block 10 is in fit with the shape of the corresponding part of the supporting surface 21 of the lower mold 2 for laying the material plate to be processed.
[0011] In the above scheme, the material plate to be processed is a soft plate, and the material plate is divided into effective utilization areas for hot pressing and forming the acoustic package. During processing, a whole flat piece of the material plate is laid on the support surface 21 of the lower mold 2, and its effective utilization areas correspond to the upper molding area A of the upper mold 1 and the lower molding area B of the lower mold. The upper mold 1 is connected with a pressing block 10. For the convenience of description and display, Figure 1 , 3 What is shown is a schematic diagram after the upper mold 1 is hidden. The position of the pressing block 10 in the figure is the posture when the material plate is pressed against the supporting surface 21 for hot pressing after the upper mold 1 and the lower mold 2 are closed. The shape of the bottom surface of the pressing block 10 and the corresponding part of the supporting surface 21 of the lower mold 2 on which the material plate to be processed is laid fit together to ensure that the pressing block 10 and the material plate are tightly pressed together, that is, the pressing block 10 in the pre-pressing surface, the material plate and the supporting surface 21 of the lower mold 2 are tightly attached without leaving any gap. Before hot pressing, the edge of the material plate is fixed to the supporting surface 21 by material pins and tightened, and then the closing action is performed. The following two schemes are set according to the different positional relationships between the pressing block 10 and the upper molding area A:
[0012] Example 1
[0013] like Figures 1 to 3As shown, the pressing block 10 is arranged at intervals on the outside of the contour edge of the adjacent upper molding area A. During the mold closing action, the pressing block 10 moves synchronously with the upper mold 1 to press the material plate against the supporting surface 21. During hot pressing, the peripheral contour of the effective molding area of the material plate is pressed by the pressing block 10, so that there will be no overlapping of materials or wrinkles on the surface of the material plate. Since the area outside the molding area of the material plate is a waste area, compared with the traditional pressing frame, the pressing block 10 can save the pre-pressing surface between the material plate and the pressing frame, effectively reducing the material area around the edges of the material plate, saving production costs, and the position and shape of the pressing block 10 can be adjusted according to the shape of the acoustic package to be formed, and the arrangement method is more flexible.
[0014] Example 2
[0015] like Figure 4 As shown, the pressing block 10 is located in the upper molding area A, and a first spring 51 is connected between the top surface of the pressing block 10 and the upper mold 1 to drive the pressing block 10 away from the upper mold 1. The bottom surface of the pressing block 10 extends out of the pressing surface of the upper mold 1 and together with it constitutes a pressing surface for hot pressing material plates.
[0016] In the above scheme, the expansion and contraction direction of the pressing block 10 driven by the first spring 51 is consistent with the closing direction of the upper mold 1. Since the bottom surface of the pressing block 10 extends out of the pressing surface of the upper mold 1, the bottom surface of the pressing block 10 contacts the material plate earlier than the pressing surface of the upper mold 1 during the closing process, and the material plate is pressed against the supporting surface by the elastic force transmitted by the first spring 51 to prevent it from sliding, thereby realizing the pre-pressing function of the pressing block 10. After the bottom surface of the pressing block 10 contacts the material plate, as the upper mold 1 moves downward, the length of the pressing block 10 extending relative to the pressing surface of the upper mold 1 gradually decreases until it is zero, that is, the bottom surface of the pressing block 10 and the pressing surface of the upper mold 1 finally form a continuous whole surface, and the two together constitute the pressing surface for hot pressing the material plate, and the transition of the material plate from flat material deformation to fitting with the upper molding area A is relatively smooth.
[0017] Preferably, the gap between the bottom surface of the pressing block 10 and the pressing surface of the upper mold 1 in the upper molding area A is located at the position where the reinforcement ribs of the acoustic package are to be molded. Since the pressing block 10 needs to be telescopically displaced in the upper mold 1, it is very convenient to leave a gap between the two for molding the reinforcement ribs on the acoustic package. The bottom surface of the pressing block 10 and the pressing surface of the upper mold 1 adjacent thereto are located on both sides of the reinforcement ribs, respectively, and the reinforcement ribs can be naturally molded during hot pressing.
[0018] In order to avoid scratches on the flat material surface, the outer edge of the pressing surface of the pressing block 10 in the upper molding area A coincides with the contour edge of the upper molding area A. In the above scheme, since the pressing block 10 needs to be telescopically displaced on the upper mold 1, a hole for accommodating the pressing block 10 is provided on the upper mold 1. A gap may be left between the hole wall of the hole and the pressing block 10. Generally, the gap is small and will not affect the material surface of the material plate. In this scheme, the outer edge of the pressing block 10 is set at the contour edge of the upper molding area A, so that the above gap is located in the waste area outside the upper molding area A. Even if the gap scratches the material surface of the material plate, it will not affect the product itself.
[0019] In order to ensure that the material plate fits the supporting surface 21 without wrinkles during the mold closing process, the lower mold 2 is provided with a lower molding area B corresponding to the upper molding area A, and a support block 12 is movably connected in the lower molding area B. A second spring 52 is connected between the bottom surface of the support block 12 and the lower mold 2 to drive the support block 12 away from the lower mold 2. The support surface on the top of the support block 12 extends out of the supporting surface 21 of the lower mold 2 and together with it constitutes a crimping surface for hot pressing the material plate. In the above scheme, the support block 12 is preferably set in a recessed position in the lower molding area B, such as Figure 4 As shown, when the material plate is laid on the supporting surface 21, the supporting surface of the supporting block 12 can effectively support the material plate to prevent it from sliding downward in the depression in the lower molding area B. After the mold closing action begins, the pressing surface of the upper mold 1 presses the material plate and forces the supporting block 12 to move downward, the second spring 52 is compressed, and the length of the supporting surface at the top of the supporting block 12 relative to the supporting surface 21 gradually decreases until it is zero, that is, the supporting surface of the supporting block 12 and the supporting surface 21 finally form a continuous whole surface, and the two together constitute the pressing surface for hot pressing the material plate, and the transition of the material plate from flat material deformation to fitting with the lower molding area B is relatively smooth.
[0020] In order to ensure the pre-pressing effect of the pressing block 10, the pressing block 10 outside the upper forming area A is in a strip shape, and the strip direction of the pressing block 10 is extended along the edge contour of the upper forming area A adjacent to it. At least two pressing blocks 10 are arranged outside the contour edge of each upper forming area A. The strip-shaped pressing block 10 can fit the edge contour of the upper forming area A more conveniently, and reduce the distance between the effective utilization area of the material plate and the edge of the plate, thereby reducing the proportion of the waste area of the material plate. In this embodiment, the pressing block 10 can save at least 100 mm of material in the length and width directions of the material plate relative to the traditional pressing frame.
[0021] In order to facilitate the laying of the material plate on the support surface 21, a material stopper 30 with an "L"-shaped cross section is provided at the four edges of the support surface 21. The material stopper 30 includes a horizontal edge 31 and a vertical edge 32, which together form an angle frame. The bottom surface of the horizontal edge 31 is connected to the support surface 21, and the inner side surface of the vertical edge 32 abuts against the outer edge of the material to be processed. The edge contour of the support surface 21 is rectangular, and two material stoppers 30 are arranged at intervals on each edge of the rectangular contour. In the above scheme, the horizontal edge 31 of the material stopper 30 is bolted to the lower mold 2, and the vertical edge 32 of the material stopper 30 can limit the laying position of the material plate, and the position of the material stopper 30 on the lower mold 2 can be flexibly adjusted according to the size of the material plate. The height of the vertical edge 32 is much greater than the thickness of the material plate, so as to prevent the edge of the material plate from sliding out of the limited area of the material stopper 30.
[0022] A more specific solution is that the upper molding area A includes mutually independent main shield upper molding area A1, front cover shield upper molding area A2 and rear cover shield upper molding area A3, the main shield upper molding area A1 and the front cover shield upper molding area A2, and the front cover shield upper molding area A2 and the rear cover shield upper molding area A3 are separated by a thin strip-shaped pressing sheet 11, and a pre-stressing spring 40 is connected between the upper sheet surface of the pressing sheet 11 and the upper mold 1 to drive the pressing sheet 11 away from the upper mold 1. During the hot pressing operation, the pressing sheet 11 is displaced downward by the pre-stressing spring 40 after the mold closing action starts and contacts the material plate before the pressing block 10, so as to separate the areas of the material plate corresponding to the molding of different shields in advance and complete the first pre-stressing action, and then the pressing block 10 presses the material plate again to more firmly press the material plate against the supporting surface 21.
Claims
1. A mold pressing structure, characterized in that: The upper mold (1) is provided with a pressing block (10) and an upper molding area (A); the pressing block (10) is located in the upper molding area (A) or is arranged at intervals on the outside of the contour edge of the upper molding area (A); the pressing block (10) in the upper molding area (A) is movably connected to the upper mold (1) and its telescopic direction is consistent with the mold closing direction of the upper mold (1); the bottom surface of the pressing block (10) is in conformity with the shape of the corresponding part of the supporting surface (21) of the lower mold (2) on which the material plate to be processed is placed.
2. The mold pressing structure according to claim 1, characterized in that: A first spring (51) is connected between the top surface of the pressing block (10) in the upper molding area (A) and the upper mold (1) to drive the pressing block (10) away from the upper mold (1); the bottom surface of the pressing block (10) extends out of the pressing surface of the upper mold (1) and together with the pressing surface, forms a pressing surface for hot pressing a material plate.
3. The mold pressing structure according to claim 2, characterized in that: The gap between the bottom surface of the pressing block (10) in the upper forming area (A) and the pressing surface of the upper mold (1) is located at the position where the acoustic bag reinforcement ribs are to be formed.
4. The mold pressing structure according to claim 2, characterized in that: The outer edge of the pressing surface of the pressing block (10) in the upper forming area (A) coincides with the contour edge of the upper forming area (A).
5. The mold pressing structure according to claim 1, characterized in that: The lower mold (2) is provided with a lower molding area (B) corresponding to the upper molding area (A); a support block (12) is movably connected in the lower molding area (B); a second spring (52) is connected between the bottom surface of the support block (12) and the lower mold (2) to drive the support block (12) away from the lower mold (2); a supporting surface at the top of the support block (12) extends out of the supporting surface (21) of the lower mold (2) and together with the support block (12), forms a pressing surface for hot pressing a material plate.
6. The mold pressing structure according to claim 1, characterized in that: The pressing block (10) outside the upper forming area (A) is in the shape of a strip, and the strip direction of the pressing block (10) is extended along the edge contour of the upper forming area (A) adjacent to it.
7. The mold pressing structure according to claim 1, characterized in that: A material blocking frame (30) with an L-shaped cross section is provided at the four edges of the material supporting surface (21). The material blocking frame (30) includes a horizontal edge (31) and a vertical edge (32), which together form an angle frame. The bottom surface of the horizontal edge (31) is connected to the material supporting surface (21), and the inner side surface of the vertical edge (32) is in contact with the outer edge of the material to be processed.
8. The mold pressing structure according to claim 1, characterized in that: The upper molding area (A) comprises a main shield molding area (A1), a front end cover shield molding area (A2) and a rear end cover shield molding area (A3) which are independent of each other; the main shield molding area (A1) and the front end cover shield molding area (A2), and the front end cover shield molding area (A2) and the rear end cover shield molding area (A3) are separated by a thin strip-shaped pressing sheet (11); a pre-stressing spring (40) is connected between the upper sheet surface of the pressing sheet (11) and the upper mold (1) to drive the pressing sheet (11) away from the upper mold (1).
9. The mold pressing structure according to claim 1, characterized in that: At least two pressing blocks (10) are arranged on the outer side of the contour edge of each upper forming area (A).
10. The mold pressing structure according to claim 7, characterized in that: The edge profile of the supporting surface (21) is rectangular, and two material blocking racks (30) are arranged at intervals on each side of the rectangular profile.