Method for manufacturing microcellular glass fiber board parts for automobile coat racks

Abstract

The application relates to a manufacturing method of a micro-foamed glass fiber plate part for a car hat rack, which comprises the following steps: (1) placing a micro-foamed glass fiber plate into a flat plate oven for heating; (2) placing the heated micro-foamed glass fiber plate into a forming die, covering the surface with a knitted fabric, and pressing the die to form a main body forming piece; (3) mounting plastic accessories on the main body forming piece to obtain the micro-foamed glass fiber plate part for the car hat rack; the micro-foamed glass fiber plate in step (1) is provided with a layer of adhesive film on one side for bonding and fixing the knitted fabric; and the forming die in step (2) is provided with a structure thinning treatment at a position where orange peel is prone to occurring. Compared with the prior art, the application has the advantages of high efficiency and low cost.

Description

Technical Field

[0001] This invention relates to the field of automotive parts technology, specifically to a method for manufacturing micro-foamed fiberglass board parts for automotive coat racks. Background Technology

[0002] Clothing rack trim refers to decorative panels that cover the back of the rear seat backrest, the front of the rear windshield, the upper part of the rear side panel sheet metal, and visible areas. It is designed to provide a durable and aesthetically pleasing cover to shield the privacy of the luggage compartment and facilitate the storage of passengers' light items.

[0003] The automotive industry has evolved from primarily focusing on single functions to now demanding a combination of functionality, aesthetics, environmental friendliness, and lightweight design. Currently, micro-foamed fiberglass panels (EPT) are mainly used in interior headliners, requiring a two-step molding process to avoid the noticeable orange peel effect on the knitted fabric surface, which would affect the appearance. The two-step process is described as follows: 1. Heating and pressing the micro-foamed fiberglass panel into shape; 2. Spraying adhesive onto the surface of the molded micro-foamed fiberglass panel, bonding the knitted fabric to the molded part, pressing, and die-cutting; 3. Assembling the components. This two-step process requires three steps and three molds, resulting in relatively high production costs. Summary of the Invention

[0004] The purpose of this invention is to provide a method for manufacturing micro-foamed fiberglass board parts for automotive coat racks that is efficient and low-cost.

[0005] The objective of this invention can be achieved through the following technical solution: A method for manufacturing micro-foamed fiberglass board parts for automotive coat racks, comprising the following steps:

[0006] (1) Place the micro-foamed fiberglass board into a flat oven and heat it;

[0007] (2) Place the heated micro-foamed fiberglass board into the molding mold, cover the surface with knitted fabric, close the mold and press to form the main molded part.

[0008] (3) After installing plastic accessories on the main molded part, the micro-foamed fiberglass board part for car clothes rack is obtained;

[0009] In step (1), a layer of adhesive film is added to one side of the micro-foamed fiberglass board for bonding and fixing with the knitted fabric;

[0010] The molding die described in step (2) has been thinned in areas where orange peel texture is likely to occur.

[0011] Preferably, the micro-foamed fiberglass board is composed of a mixture of PP fiber, fiberglass, and microsphere foaming agent.

[0012] Preferably, the micro-foamed fiberglass board has a basis weight of 1100–1300 g / m².2 The thickness is 1.5 to 2.0 mm.

[0013] Preferably, the knitted fabric is made of PET with a weight of 280–320 g / m². 2 The thickness is 2.5 to 3.5 mm.

[0014] Preferably, the adhesive film material is PA with a basis weight of 30-50 g / m³. 2 The thickness is 0.1 to 0.3 mm.

[0015] Preferably, in step (1), the oven heating temperature is 250℃±20℃ and the heating time is 240s±20s.

[0016] Preferably, the pressing pressure in step (2) is 150-200 bar, and the time is 120s ± 10s.

[0017] Preferably, during step (2) of mold closing and pressing, the mold temperature is 15-30℃.

[0018] Preferably, the locations where the molding die is prone to orange peel texture include the corner of the surface where the front of the coat rack intersects with the rear seat, and the intersection of surfaces with significant changes in surface shape.

[0019] Preferably, the molding die is thinned by 1.0 to 2.0 mm in areas where orange peel texture is likely to occur.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The process of this invention is optimized from the conventional two-step method to a one-step method, which greatly reduces the number of production steps, significantly improves production efficiency, and makes operation more convenient;

[0022] 2. The process of this invention is optimized from three molds to one mold, which significantly shortens the processing cycle and greatly reduces the initial investment;

[0023] 3. This invention replaces the conventional fiberglass board used for making coat racks with micro-foamed fiberglass board, which reduces the overall weight and helps to reduce the overall weight of the car, in line with the lightweighting trend in the automotive industry;

[0024] 4. Compared to the two-step method of micro-foamed fiberglass board molding, which requires the use of three molds to improve the surface of the knitted fabric and avoid obvious orange peel effect, the one-step method of this invention uses one mold. The mold has been structurally thinned in the areas where orange peel is likely to occur to meet the appearance requirements, thus achieving the goal of high efficiency and low cost. Detailed Implementation

[0025] The embodiments of the present invention will be described in detail below. The following embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0026] Example 1

[0027] A method for manufacturing micro-foamed fiberglass board parts for automotive coat racks, the specific steps of which are as follows:

[0028] (1) Place the micro-foamed fiberglass board into a flat oven and heat it. The oven temperature is 250℃ and the heating time is 240s.

[0029] (2) Place the heated micro-foamed fiberglass board into the molding mold, cover the surface with knitted fabric, close the mold and press for 120 seconds to make the main molded part.

[0030] (3) After installing the plastic parts at the specified positions on the main body, the finished part is obtained.

[0031] A layer of adhesive film is added to one side of the micro-foamed fiberglass board for bonding and fixing with the surface knitted fabric;

[0032] During continuous molding of the coat rack forming mold, the mold temperature is controlled at 20℃ to ensure that the formed parts can cool down quickly and the knitted fabric will not change color due to excessive temperature.

[0033] The pressure is controlled at 180 bar when the press is used for pressing.

[0034] Example 2

[0035] A method for manufacturing micro-foamed fiberglass board parts for automotive coat racks, the specific steps of which are as follows:

[0036] (1) Place the micro-foamed fiberglass board into a flat oven and heat it. The oven temperature is 270℃ and the heating time is 220s.

[0037] (2) Place the heated micro-foamed fiberglass board into the molding mold, cover the surface with knitted fabric, close the mold and press for 130 seconds to make the main molded part.

[0038] (3) After installing the plastic parts at the specified positions on the main body, the finished part is obtained.

[0039] A layer of adhesive film is added to one side of the micro-foamed fiberglass board for bonding and fixing with the surface knitted fabric;

[0040] During continuous molding of the coat rack forming mold, the mold temperature is controlled at 15℃ to ensure that the formed parts can cool down quickly and the knitted fabric will not change color due to excessive temperature.

[0041] The pressure is controlled at 150 bar when the press is used for pressing.

[0042] Example 3

[0043] A method for manufacturing micro-foamed fiberglass board parts for automotive coat racks, the specific steps of which are as follows:

[0044] (1) Place the micro-foamed fiberglass board into a flat oven and heat it. The oven temperature is 230℃ and the heating time is 260s.

[0045] (2) Place the heated micro-foamed fiberglass board into the molding mold, cover the surface with knitted fabric, close the mold and press for 110 seconds to make the main molded part.

[0046] (3) After installing the plastic parts at the specified positions on the main body, the finished part is obtained.

[0047] A layer of adhesive film is added to one side of the micro-foamed fiberglass board for bonding and fixing with the surface knitted fabric;

[0048] During continuous molding of the coat rack forming mold, the mold temperature is controlled at 30℃ to ensure that the formed parts can cool down quickly and the knitted fabric will not change color due to excessive temperature.

[0049] The pressure is controlled at 200 bar when the press is used for pressing.

[0050] The parts prepared in Examples 1-3 can meet the following performance requirements:

[0051] 1. Appearance: By reducing the manufacturing process to a one-step process, the surface of the parts is guaranteed to be flat and uniform, without obvious defects such as orange peel, thus meeting the stringent appearance requirements for the surface of the coat rack.

[0052] 2. Weight: The total weight of the main body is controlled at 1500g / m³. 2 The existing conventional material has a weight of approximately 1900 g / m³. 2 The goal of reducing the weight of parts was achieved while ensuring that the function remained unchanged.

[0053] In the prior art, in order to avoid a large amount of obvious orange peel effect on the surface, a two-step method is used when manufacturing the main body molded part: first, the fiberglass board is formed, then the knitted fabric is glued and bonded, and then it is punched. This requires three processes and three molds. The present invention uses a one-step fiberglass board forming method to manufacture the main body molded part, which only requires one process and one mold. The use of molds and processes is greatly reduced, and the corresponding manufacturing cost is greatly reduced.

[0054] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any 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 invention should be within the protection scope of the present invention.

Claims

1. A method for manufacturing micro-foamed fiberglass board parts for automotive coat racks, characterized in that, Includes the following steps: (1) Place the micro-foamed fiberglass board into a flat oven and heat it; (2) Place the heated micro-foamed fiberglass board into the molding mold, cover the surface with knitted fabric, close the mold and press to form the main molded part. (3) After installing plastic accessories on the main molded part, the micro-foamed fiberglass board part for car clothes rack is obtained; In step (1), a layer of adhesive film is added to one side of the micro-foamed fiberglass board for bonding and fixing with the knitted fabric; The molding die described in step (2) has undergone structural thinning treatment in areas where orange peel texture is likely to occur; The knitted fabric is made of PET and has a weight of 280-320 g / m². 2 The thickness is 2.5–3.5 mm; The adhesive film is made of PA with a basis weight of 30-50 g / m³. 2 The thickness is 0.1–0.3 mm; The areas where the molding die is prone to orange peel texture include the corner of the surface where the front of the coat rack intersects with the rear seat; The molding die is thinned by 1.0 to 2.0 mm in areas where orange peel texture is likely to occur.

2. The manufacturing method of the micro-foamed fiberglass board part for automobile coat racks according to claim 1, characterized in that, The micro-foamed fiberglass board is composed of a mixture of PP fiber, fiberglass and microsphere foaming agent.

3. The manufacturing method of the micro-foamed fiberglass board part for automobile coat racks according to claim 1, characterized in that, The micro-foamed fiberglass board has a basis weight of 1100-1300 g / m². 2 The thickness is 1.5 to 2.0 mm.

4. The manufacturing method of the micro-foamed fiberglass board part for automobile coat racks according to claim 1, characterized in that, Step (1) The oven heating temperature is 250℃±20℃; the heating time is 240s±20s.

5. The manufacturing method of the micro-foamed fiberglass board part for automobile coat racks according to claim 1, characterized in that, Step (2) The mold closing pressure is 150-200 bar, and the time is 120s ± 10s.

6. The manufacturing method of the micro-foamed fiberglass board part for automobile coat racks according to claim 1, characterized in that, When pressing the mold in step (2), the mold temperature is 15-30℃.