Application of a semi-finished product forming mold for automobile sound insulation pad
By setting up prepressed buffer blocks on the automotive sound insulation pad forming mold, the wrinkle problem around the semi-finished pad blank is solved, and the smoothness and production pass rate of the finished product edges are improved, ensuring the product quality after punching.
Patent Information
- Application Number
- CN201911160411.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2019-11-23
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2039-11-23
AI Technical Summary
The semi-finished products of car sound insulation pads are prone to peripheral wrinkles during the punching and cutting process, which affects the quality of the finished product and leads to scrapping. The existing molds cannot effectively solve this problem.
Design a semi-finished mold for automotive sound insulation pads, including lower mold and upper mold. Prepressed buffer blocks are provided with edges of lower mold and upper mold. When closing the mold, the prepressed buffer blocks are contacted with raw materials in advance, tighten the peripheral materials, and form smooth edges. .
Through the design of the pre-pressed buffer block, the edges of the finished product are smooth and wrinkle-free, which improves product quality and production pass rate, and ensures that the cut after punching is continuous, neat and beautiful.
Smart Images
Figure CN110760997B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of automobile sound insulation pad processing, and in particular to the application of a semi-finished product forming mold for an automobile sound insulation pad. Background Art
[0002] Among the many sound insulation parts of a car, there is a type of sound insulation part with the following structure: kraft paper + PUR + kraft paper. The kraft paper + PUR + kraft paper sheets are placed in a mold to form, and then taken out of the molding mold to be cooled after forming. After cooling, they are placed in a punching mold to obtain the final finished parts.
[0003] The current molding molds have the following deficiencies: (1) The periphery of the automotive sound insulation pad parts is prone to wrinkling during the molding process. When the wrinkles extend to the product area, the parts will be scrapped; (2) The mold edge is designed along the part edge, which causes the product edge to wrinkle during the mold closing process, forming a ruffle. After the semi-finished pad is cooled and formed, wrinkles remain on the surface of the product after punching, affecting the quality of the finished product and even causing the finished product to be scrapped.
[0004] At present, some automobile sound insulation pad punching dies have been disclosed. For example, patent CN108149389A discloses an improved die for forming sound insulation pads and its application. The die includes an upper die and a lower die that match each other. The wool pad blank to be processed is placed between the upper die and the lower die. A filling component is provided in the middle of the lower die. The filling component includes: a fixed base arranged on both sides of the lower die, a spring arranged on the fixed base, a spring cross bar sleeved on the top of the spring, and connecting the springs on both sides. However, the main problem solved by this die is to avoid the problem of excessive stretching causing the wool pad to rupture. However, it cannot solve the problem of wrinkling around the pad blank of the semi-finished automobile sound insulation pad that currently exists. Summary of the invention
[0005] The purpose of the present invention is to solve the problem of wrinkling around the semi-finished pad during the punching process, and to provide an application of a semi-finished molding mold for an automobile sound insulation pad. This mold can solve the problem of wrinkling around the semi-finished pad and improve the qualified rate of finished products.
[0006] The purpose of the present invention is achieved through the following technical solutions:
[0007] A method for forming a semi-finished product of an automobile sound insulation pad comprises the following steps: the forming mold comprises a lower mold and an upper mold, the lower mold comprises a lower mold frame and a lower mold core, the upper mold comprises an upper mold frame matched with the lower mold frame and an upper mold core matched with the lower mold core, a molding cavity for forming the semi-finished product of the sound insulation pad is formed between the lower mold core and the upper mold core, a plurality of pre-stressing buffer blocks are arranged at the peripheral edge of the upper mold core or the lower mold core, when the upper mold and the lower mold are closed, the pre-stressing buffer blocks first contact the semi-finished product of the sound insulation pad, and as the molds are closed, the surrounding raw materials are first tightened, so that the raw materials inside the pre-stressing blocks can be fully stretched to obtain product parts with smooth surfaces, thereby improving product quality and product production qualification rate.
[0008] Furthermore, the pre-compression buffer blocks are arranged at intervals around the upper die core or the lower die core.
[0009] Furthermore, the thickness of the pre-compression buffer block is 2 / 10-3 / 10 of the thickness of the semi-finished sound insulation pad.
[0010] Furthermore, the pre-compression buffer block is a metal block.
[0011] Furthermore, the pre-compression buffer block is an aluminum block, which is embedded around the upper die core or the lower die core.
[0012] Furthermore, the lower mold is provided with a lower mold heating plate, and the lower mold heating plate is arranged between the lower mold frame and the lower mold core, and a lower mold heat insulation plate is also arranged between the lower mold heating plate and the lower mold frame.
[0013] Furthermore, the upper mold is provided with an upper mold heating plate, and the upper mold heating plate is arranged between the upper mold frame and the upper mold core, and an upper mold heat insulation plate is also arranged between the upper mold heating plate and the upper mold frame.
[0014] Furthermore, the molding cavity has a shape that matches the shape of the semi-finished sound insulation pad, and has a thickness of 10-15 mm.
[0015] The molding die is used to manufacture semi-finished automobile sound insulation pads with smooth surfaces and wrinkle-free edges. The specific process is to place the sheet to be processed between the upper die and the lower die. During the mold closing process, the surrounding pre-compression buffer blocks contact the rough pad blank in advance, first tighten the surrounding raw materials, so that the internal sheet can be fully stretched to obtain a product with a smooth surface.
[0016] In order to solve the problem of wrinkling around the semi-finished pad, the present invention sets a group of pre-pressing buffer blocks around the forming mold. The working principle of the pre-pressing buffer blocks is as follows: during the mold closing process, the peripheral pre-pressing buffer blocks contact the raw material with a thickness of about 10mm 2-3mm in advance, and then tighten the peripheral raw material 2-3mm in advance of the finished product thickness, so that the raw material inside the pre-pressing block can be fully stretched to obtain product parts with smooth surface, thereby improving product quality and product production qualification rate. After punching, the peripheral incisions of the products formed by the mold of the present invention are continuous and linearly distributed, neat and beautiful; improving product quality and product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of a product according to an embodiment of the present invention;
[0018] Figure 2 It is a schematic diagram of the overall structure of the molding die of the present invention;
[0019] Figure 3 for Figure 2 Schematic diagram of the main structure;
[0020] Figure 4 for Figure 3 AA section view;
[0021] Figure 5 for Figure 4 A schematic diagram of a local enlarged structure;
[0022] In the figure:
[0023] Upper mold 100, upper mold frame 101, upper mold core 102, upper mold heating plate 103, upper mold heat insulation plate 104;
[0024] Lower mold 200, lower mold frame 201, lower mold core 202, lower mold heating plate 203, lower mold insulation plate 204;
[0025] Pre-compression buffer block 300; finished part edge boundary a; wrinkle area b. DETAILED DESCRIPTION
[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. Example
[0027] like Figure 2-5 A semi-finished product molding die for automobile sound insulation pads includes a lower die 200 and an upper die 100. The lower die includes a lower die frame 201 and a lower die core 202. The upper die includes an upper die frame 101 matched with the lower die frame 201 and an upper die core 102 matched with the lower die core 202. A molding cavity for molding the semi-finished product of the sound insulation pad is formed between the lower die core 202 and the upper die core 102. The molding cavity is a shape that matches the shape of the semi-finished product of the sound insulation pad. Figure 1The lower mold is provided with a lower mold heating plate 203, which is arranged between the lower mold frame 201 and the lower mold core 202, and a lower mold heat insulation plate 204 is also arranged between the lower mold heating plate 203 and the lower mold frame 201. The upper mold is provided with an upper mold heating plate 103, which is arranged between the upper mold frame 101 and the upper mold core 102, and an upper mold heat insulation plate 104 is also arranged between the upper mold heating plate 103 and the upper mold frame 101.
[0028] To solve the problem of wrinkling of the semi-finished blank outside the edge limit a of the part during the punching process (see wrinkling area b) Figure 5 ), in this embodiment, a plurality of pre-stress buffer blocks 300 are provided at the peripheral edge of the lower mold core 202 of the forming mold. The pre-stress buffer blocks 300 are arranged at intervals around the upper mold core 102 or the lower mold core 202. The specific intervals are set according to actual needs. The pre-stress buffer blocks 300 can be set as aluminum blocks and embedded around the lower mold core 202. The thickness of the pre-stress buffer block 300 is generally 2 / 10-3 / 10 of the thickness of the semi-finished sound insulation pad. For raw materials with a thickness of about 10mm, the thickness of the pre-stress buffer block is 2-3mm. During the mold closing process, the peripheral pre-stress buffer blocks are contacted 2-3mm in advance, and then the peripheral raw materials are tightened 2-3mm in advance of the finished product thickness, so that the raw materials inside the pre-stress blocks can be fully stretched to obtain product parts with smooth surfaces, improve product quality and product production qualification rate, ensure that the peripheral incisions of the molded products are continuous and linearly distributed after punching, and are neat and beautiful, thereby improving product quality and product qualification rate.
[0029] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.
Claims
1. An application of a semi-finished molding die for a car sound insulation pad, the molding die comprising a lower mold (200) and an upper mold (100), the lower mold comprising a lower mold frame (201) and a lower mold core (202), the upper mold comprising an upper mold frame (101) matching the lower mold frame (201) and an upper mold core (102) matching the lower mold core (202), characterized in that: A molding cavity for molding the semi-finished sound insulation pad is formed between the lower mold core (202) and the upper mold core (102), the shape of the molding cavity being adapted to the shape of the semi-finished sound insulation pad and having a thickness of 10-15 mm; The upper mold is provided with an upper mold heating plate (103), the upper mold heating plate (103) is arranged between the upper mold frame (101) and the upper mold core (102), and an upper mold heat insulation plate (104) is also arranged between the upper mold heating plate (103) and the upper mold frame (101); The lower mold is provided with a lower mold heating plate (203), the lower mold heating plate (203) is arranged between the lower mold frame (201) and the lower mold core (202), and a lower mold heat insulation plate (204) is also arranged between the lower mold heating plate (203) and the lower mold frame (201); A plurality of pre-pressing buffer blocks (300) are provided at the peripheral edge of the upper mold core (102) or the lower mold core (202); the pre-pressing buffer blocks (300) are arranged at intervals around the upper mold core (102) or the lower mold core (202), and the thickness of the pre-pressing buffer blocks (300) is 2 / 10 to 3 / 10 of the thickness of the semi-finished sound insulation pad; The semi-finished automobile sound insulation pad forming mold is used to manufacture a semi-finished automobile sound insulation pad with a smooth surface and no wrinkles on the periphery; a sheet to be processed is placed between the upper mold (100) and the lower mold (200), and when the upper mold (100) and the lower mold (200) are closed, the peripheral pre-compression buffer block (300) contacts the rough pad blank in advance, first tightens the peripheral raw material, and allows the internal sheet to be fully stretched, and finally obtains a semi-finished automobile sound insulation pad with a smooth surface.
2. The use of a semi-finished product forming mold for a car sound insulation pad according to claim 1, characterized in that: The pre-compression buffer block (300) is a metal block.
3. The use of a semi-finished product forming mold for a car sound insulation pad according to claim 2, characterized in that: The pre-pressing buffer block (300) is an aluminum block and is embedded around the upper mold core (102) or the lower mold core (202).