Compression molding die for automobile door panel manufactured based on bio-based reinforcing material

Abstract

The invention discloses a compression molding die for an automobile door panel manufactured based on a bio-based reinforcing material, which comprises an upper die, a lower die, a first sliding block mechanism, a second sliding block mechanism and a third sliding block mechanism, and a first driving oil cylinder, a second driving oil cylinder and a third driving oil cylinder are respectively arranged on the right sides of the first sliding block mechanism, the second sliding block mechanism and the third sliding block mechanism. A second sliding block mechanism is arranged on one side of the lower mold in a sliding mode, a first sliding block mechanism is arranged on the corresponding side of the upper mold in a sliding mode, and an inverted buckle structure pressing area is formed between the first sliding block mechanism and the second sliding block mechanism. The third sliding block mechanism is used for locking the second sliding block mechanism; the locking block is used for locking the first sliding block mechanism located at the mold closing position. By means of the first sliding block mechanism and the second sliding block mechanism, hot press forming of an inverted buckle structure is achieved, and the problems of demolding cracking and insufficient forming strength are solved.

Description

Technical Field

[0001] This invention belongs to the technical field of automotive door panel molding dies, specifically relating to a molding die for automotive door panels made based on bio-based reinforced materials. Background Technology

[0002] With the increasing emphasis on industrial environmental protection, the application of bio-based materials, represented by hemp fiber, continues to expand in fields such as automotive interiors and home appliance panels. Compression molding, as a key process in the production of hemp fiber products, directly affects the assembly compatibility of subsequent assembly processes. For example... Figure 1 As shown, taking the car door interior panel frame as an example, this product has an undercut structure of about 21 mm deep in the upper part area. This feature is prone to causing the following problems during normal pressing: 1. Significant overflow at the parting line on surface A: Due to the need for the undercut structure, the mold is equipped with a slider mechanism at this point. Under high temperature and high pressure conditions, the joint between the slider and the cavity causes the fiber material to overflow, forming a raised ridge on surface A of the product. 2. Product cracking during demolding: If the undercut depth is large, direct ejection can easily lead to component cracking due to stress concentration; 3. The wall thickness of the molded part does not meet the design requirements and the rigidity is insufficient: Hemp fiber material has almost no tensile properties. When the deep undercut area is formed in the natural laying state, the fiber is stretched and breaks, forming local holes and thinning of the thickness, which cannot meet the structural performance standards. Summary of the Invention

[0003] The purpose of this invention is to provide a molding die for automotive door panels made of bio-based reinforced materials, which aims to achieve hot pressing molding of automotive door panels with an inverted structure by closing the upper die, the lower die, the first slider mechanism, and the second slider mechanism.

[0004] This invention is mainly achieved through the following technical solutions: A molding die for a car door panel made of bio-based reinforced material includes an upper die, a lower die, a locking block, a first slider mechanism, a second slider mechanism, and a third slider mechanism, wherein a first driving cylinder, a second driving cylinder, and a third driving cylinder are respectively arranged on the right side of the first slider mechanism, the second slider mechanism, and the third slider mechanism. A lower mold is provided below the upper mold. A second slider mechanism is slidably provided on one side of the lower mold, and a first slider mechanism is slidably provided on the corresponding side of the upper mold. The first slider mechanism and the second slider mechanism form an undercut structure pressing area. A third slider mechanism is provided on one side of the second slider mechanism, the third slider mechanism being used to lock the second slider mechanism; the locking block is used to lock the first slider mechanism located in the mold closing position; The second drive cylinder is used to push the second slider mechanism to move linearly along one side of the lower mold. The third drive cylinder is used to push the third slider mechanism to lock or disengage from the second slider mechanism; The first driving cylinder is used to push the first slider mechanism to move linearly along one side of the upper mold.

[0005] To better realize the present invention, the molding die further includes a device drive mechanism, which is used to simultaneously drive the upper die and the locking block to move up or down at the same time.

[0006] To better realize the present invention, a snap-fit ​​groove is further provided on one side of the tail end of the second slider mechanism corresponding to the third slider mechanism.

[0007] To better realize the present invention, the third slider mechanism is further described as a block structure, and the locking groove is an L-shaped structure.

[0008] To better realize the present invention, a locking groove is further provided on the top of the first slider mechanism corresponding to the locking block.

[0009] To better realize the present invention, one side of the first slider mechanism and the second slider mechanism are respectively attached to the upper mold and the lower mold, and the opposite side of the first slider mechanism and the second slider mechanism is used to press the undercut structure.

[0010] The beneficial effects of this invention are as follows: This invention achieves thermoforming of the inverted structure through a first slider mechanism and a second slider mechanism, controlling the overflow height on the A-side to within 0.5 mm and completely solving the problems of demolding cracking and insufficient molding strength. The mold structure of this invention successfully achieves thermoforming of inverted hemp fiber products with a maximum depth of 21 mm, with an overflow height on the A-side not exceeding 0.5 mm; effectively eliminating demolding cracking and defects such as holes generated during molding; possessing good versatility and applicability, it can be applied to the molding and manufacturing of various hemp fiber interior products for automobiles. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the inverted structure of a car door interior panel; Figure 2 This is a schematic diagram of the molding die for a car door panel based on bio-based reinforced materials, according to the present invention.

[0012] Wherein: 01-First driving cylinder, 02-Locking block, 03-First slider mechanism, 04-Upper mold, 05-Lower mold, 06-Second slider mechanism, 07-Second driving cylinder, 08-Third slider mechanism, 09-Pressure mechanism, 10-Third driving cylinder. Detailed Implementation

[0013] Example 1: A molding die for automotive door panels made from bio-based reinforcing materials, such as... Figure 2 As shown, the device includes a device drive mechanism, an upper mold 04, a lower mold 05, a locking block 02, a first slider mechanism 03, a second slider mechanism 06, and a third slider mechanism 08. A first drive cylinder 01, a second drive cylinder 07, and a third drive cylinder 10 are respectively arranged on the right side of the first slider mechanism 03, the second slider mechanism 06, and the third slider mechanism 08. The device drive mechanism is used to simultaneously drive the upper mold 04 and the locking block 02 to move upwards or downwards.

[0014] Below the upper mold 04, a lower mold 05 is provided. A second slider mechanism 06 is slidably provided on one side of the lower mold 05, and a first slider mechanism 03 is slidably provided on the corresponding side of the upper mold 04. The first slider mechanism 03 and the second slider mechanism 06 form an undercut structure pressing area. A third slider mechanism 08 is provided on one side of the second slider mechanism 06, and the third slider mechanism 08 is used to lock the second slider mechanism 06; a snap-fit ​​groove is provided at the tail end of one side of the second slider mechanism 06 corresponding to the third slider mechanism 08 (preferably, the third slider mechanism 08 is a block structure, and the snap-fit ​​groove is an L-shaped structure). The locking block 02 is used to lock the first slider mechanism 03 located in the mold closing position; a locking groove is provided at the top of the first slider mechanism 03 corresponding to the locking block 02.

[0015] The third drive cylinder 10 is used to push the third slider mechanism 08 to lock or disengage from the second slider mechanism 06; the second drive cylinder 07 is used to push the second slider mechanism 06 to move linearly along one side of the lower mold 05; the first drive cylinder 01 is used to push the first slider mechanism 03 to move linearly along one side of the upper mold 04. One side of the first slider mechanism 03 and the second slider mechanism 06 are respectively attached to the upper mold 04 and the lower mold 05, and the opposite side of the first slider mechanism 03 and the second slider mechanism 06 is used to press the undercut structure.

[0016] The workflow of this invention includes the following steps: 1. Mold Closing: The mold closing process is as follows: The second drive cylinder 07 pushes the second slider mechanism 06 to the limited position, and the second slider mechanism 06 is fully engaged with the lower mold 05; the third drive cylinder 10 pushes the third slider mechanism 08 to the limit position, thereby locking the third slider mechanism 08 onto the second slider mechanism. The softened hemp fiber felt, after baking, is precisely laid on the surface of the lower mold 05 and the second slider mechanism 06 by a robotic arm. Subsequently, the pressing mechanism 09 pre-presses and positions the fiber felt during the mold closing process. The first drive cylinder 01 pushes the first slider mechanism 03 to the mold closing limit position, and the equipment drive mechanism drives the upper mold 04 downward and moves the locking block 02 into place, thereby locking the first slider mechanism.

[0017] 2. After the mold is closed, apply high pressure and perform hot pressing.

[0018] 3. Mold opening: After the mold is depressurized, the equipment drive mechanism drives the upper mold 04 and the locking block 02 to move upward and separate; the first drive cylinder 01 pulls the first slider mechanism 03 back to the limit position; the third drive cylinder 10 pulls the third slider mechanism 08 back; the second drive cylinder 07 pulls the second slider mechanism 06 back to the initial position, and the robot takes out the molded product.

[0019] 4. Repeat the above actions to achieve continuous automated production.

[0020] The mold structure of this invention successfully achieves hot pressing molding of hemp fiber products with a maximum depth of 21 mm, and the overflow height on side A is no more than 0.5 mm; it effectively eliminates demolding cracks and defects such as holes generated during molding; it has good versatility and applicability, and can be applied to the molding and manufacturing of various hemp fiber interior products for automobiles.

[0021] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A compression molding mold for an automotive door panel manufactured based on a bio-based reinforcement material, characterized by, The mold upper die (04), the mold lower die (05), the locking block (02), the first slider mechanism (03), the second slider mechanism (06) and the third slider mechanism (08) are included, and the first slider mechanism (03), the second slider mechanism (06) and the third slider mechanism (08) are respectively provided with the first driving oil cylinder (01), the second driving oil cylinder (07) and the third driving oil cylinder (10) from the right side; The mold lower die (05) is arranged below the mold upper die (04), one side of the mold lower die (05) is slidably provided with the second slider mechanism (06), and the corresponding side of the mold upper die (04) is slidably provided with the first slider mechanism (03), and the first slider mechanism (03) and the second slider mechanism (06) form a reverse buckle structure pressing area; One side of the second slider mechanism (06) is provided with the third slider mechanism (08), and the third slider mechanism (08) is used for locking the second slider mechanism (06); the locking block (02) is used for locking the first slider mechanism (03) in the mold closing position; The second driving oil cylinder (07) is used for pushing the second slider mechanism (06) to move linearly along one side of the mold lower die (05); The third driving oil cylinder (10) is used for pushing the third slider mechanism (08) to lock or separate from the second slider mechanism (06); The first driving oil cylinder (01) is used for pushing the first slider mechanism (03) to move linearly along one side of the mold upper die (04).

2. A compression molding mold for manufacturing an automobile door panel based on a bio-based reinforcement material according to claim 1, characterized in that, The mold pressing forming mold further includes a device driving mechanism, which is used for simultaneously driving the mold upper die (04) and the locking block (02) to move upward or downward at the same time.

3. A compression molding mold for manufacturing an automobile door panel based on a bio-based reinforcement material according to claim 1 or 2, characterized in that, One side of the second slider mechanism (06) is provided with a clamping groove corresponding to the third slider mechanism (08).

4. A compression molding mold for manufacturing an automobile door panel based on a bio-based reinforcement material according to claim 3, characterized in that, The third slider mechanism (08) is a block structure, and the clamping groove is an L-shaped structure.

5. A compression molding mold for manufacturing an automobile door panel based on a bio-based reinforcement material according to claim 1 or 2, characterized in that, The top of the first slider mechanism (03) is provided with a locking groove corresponding to the locking block (02).

6. A compression molding mold for manufacturing an automobile door panel based on a bio-based reinforcement material according to claim 1, characterized in that, One side of the first slider mechanism (03) and the second slider mechanism (06) respectively abuts against the mold upper die (04) and the mold lower die (05), and the opposite side of the first slider mechanism (03) and the second slider mechanism (06) is used for pressing the reverse buckle structure.

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