Automobile front end frame die with iron piece pre-deformation compensation

Abstract

A front-end frame mold for automobiles with pre-deformation compensation for iron parts includes a cavity plate and a core plate. A pad, cavity frame, and cavity insert are provided under the cavity plate. A mold foot, core plate, and core insert are provided on the core plate. The core insert and cavity insert cooperate to form a mold cavity. Inserts are provided in the mold cavity, including an upper crossbeam metal part, a left vertical beam metal part, and a right vertical beam metal part. Pre-deformation semi-circular grooves are provided on both ends of the upper crossbeam metal part. Overlapping portions are provided at the upper ends of the left and right vertical beam metal parts, with pre-deformation semi-circular buckles on the overlapping portions. The overlapping portions overlap the two ends of the upper crossbeam metal part, and the pre-deformation semi-circular buckles cooperate with the pre-deformation semi-circular grooves. When the product is formed, the plastic part shrinks. Under the action of the shrinkage force, the pre-deformation semi-circular buckles and pre-deformation semi-circular grooves shift, causing displacement between the left and right vertical beam metal parts and the upper crossbeam metal part, automatically adjusting the shrinkage rate of the plastic part.

Description

Technical Field

[0001] This invention relates to a car front frame mold with pre-deformation compensation for iron parts, belonging to the field of injection molds. Background Technology

[0002] The front-end frame of a car is a support frame located at the front of the engine, securing the radiator. It consists of an upper crossbeam, a lower crossbeam, a left vertical beam, and a right vertical beam. Traditionally, front-end frames are made of welded sheet metal, resulting in heavy weight and high cost. In recent years, in response to energy conservation and emission reduction trends and to adapt to the trend of lightweight vehicle bodies, some car manufacturers have adopted a plastic-coated steel structure in their front-end frame designs. This involves covering the upper crossbeam, lower crossbeam, left vertical beam, and right vertical beam with plastic material, reducing the thickness of the metal supports used as inserts, thereby reducing the amount of metal material used and thus reducing weight.

[0003] The plastic-coated iron front frame is formed by injection molding. During the design process, the metal supports of the upper crossbeam, left vertical beam and right vertical beam are used as inserts and placed into the injection mold respectively, and are integrally injection molded with plastic material. The lower crossbeam is completely replaced by plastic, so as to achieve the purpose of ensuring quality and reducing weight.

[0004] However, in actual processing, since the metal bracket (insert) is made of an integral welded upper crossbeam, left vertical beam and right vertical beam, and the lower crossbeam is completely replaced by plastic, when the product is injection molded and shaped, the plastic part with insert has a small shrinkage rate and the plastic part without insert has a large shrinkage rate, resulting in uneven shrinkage, distortion and deformation of the product, causing scrap. Therefore, the yield rate of the existing plastic-coated iron front frame mold has always been low, and the production cost remains high. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide an automotive front-end frame mold with pre-deformation compensation for iron parts, which reduces the deformation of plastic parts and improves product quality by adjusting the insert structure and setting the pre-deformation compensation amount.

[0006] The technical solution of the automobile front frame mold with pre-deformation compensation for iron parts of the present invention is as follows: It includes a mold cavity plate and a core plate. A pad is set under the cavity plate, a runner frame is set in the pad, and a hot runner is connected below the runner frame. A cavity frame is set under the pad, and a cavity insert is set in the cavity frame. A mold foot is set on the core plate, a core plate is set on the mold foot, and a core insert is set on the core plate. The core insert and the cavity insert cooperate to form a mold cavity. The hot runner communicates with the mold cavity. An insert is set in the mold cavity. The insert includes an upper crossbeam metal part, a left vertical beam metal part, and a right vertical beam metal part. The upper crossbeam metal part has pre-deformation semi-circular grooves on both ends. The left vertical beam metal part has a pre-deformation semi-circular groove on each end. The upper ends of the upright beam metal parts and the right upright beam metal parts are each provided with an overlapping part, and a pre-deformed semi-circular buckle is provided on the overlapping part. The overlapping part includes an upwardly protruding convex plate and a downwardly bent folded plate. The pre-deformed semi-circular buckle is located at the bend between the flat plate and the folded plate. The two ends of the upper crossbeam metal parts are provided with raised points A. The convex plate and the folded plate overlap on the raised points A. The pre-deformed semi-circular buckle cooperates with the pre-deformed semi-circular groove. When the product is formed, the plastic part shrinks. Under the action of shrinkage force, the pre-deformed semi-circular buckle and the pre-deformed semi-circular groove change, causing the left and right upright beam metal parts and the upper crossbeam metal parts to shift, automatically adjusting the shrinkage rate of the plastic part.

[0007] The automotive front-end frame mold with pre-deformation compensation for iron parts of the present invention, because the overlapping parts of the left and right upright metal parts overlap on the two ends of the upper crossbeam metal part and are positioned by the pre-deformed semi-circular buckle and the pre-deformed semi-circular groove, are not fixedly welded. That is, the upper crossbeam metal part, the left upright metal part, and the right upright metal part are three independent individuals. When the product is injection molded, the plastic parts covering the upper crossbeam metal parts, the left upright metal parts, and the right upright metal parts will shrink. Under the action of shrinkage force, the position of the pre-deformed semi-circular buckle and the pre-deformed semi-circular groove will change, causing the left and right upright metal parts to shift relative to the upper crossbeam metal part. This automatically adjusts the shrinkage rate of the plastic parts, achieves the purpose of deformation compensation, reduces the amount of deformation of the plastic parts, improves product quality, and reduces production costs.

[0008] The present invention relates to a car front frame mold with pre-deformation compensation for iron parts. The upper crossbeam metal part, the left vertical beam metal part, and the right vertical beam metal part are each provided with a number of insert positioning holes. The core insert is provided with corresponding insert positioning pads. The insert positioning holes cooperate with the insert positioning pads, so that the positioning of the upper crossbeam metal part, the left vertical beam metal part, and the right vertical beam metal part is convenient and reliable. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the automotive front-end frame mold structure with pre-deformation compensation for iron parts according to the present invention; Figure 2 This is a schematic diagram of the overlapping state of the upper crossbeam metal component, the left vertical beam metal component, and the right vertical beam metal component of the present invention. Figure 3 This is a schematic diagram of the upper crossbeam metal component of the present invention; Figure 4 This is a schematic diagram of the metal component of the right upright beam of the present invention; Figure 5 This is a schematic diagram of the fit between the insert positioning hole and the insert positioning pad of the present invention. Detailed Implementation

[0010] This invention relates to a mold for a car front-end frame with pre-deformation compensation for iron parts, such as... Figure 1 — Figure 5 As shown, the mold includes a cavity cover plate 1 and a core cover plate 2. A pad plate 3 is set under the cavity cover plate, and a runner frame 5 is set in the pad plate. A hot runner nozzle 6 is connected under the runner frame. A cavity frame 7 is set under the pad plate, and a cavity insert 8 is set in the cavity frame. A mold foot 9 is set on the core cover plate, and a core plate 10 is set on the mold foot. A core insert 11 is set on the core plate. The core insert and the cavity insert cooperate to form a mold cavity. The hot runner is connected to the mold cavity. An insert 01 is set in the mold cavity. The insert 01 includes an upper crossbeam metal part 12, a left vertical beam metal part 13, and a right vertical beam metal part 15. A pre-deformed semi-circular groove 20 is set on each of the two ends of the upper crossbeam metal part 12. The upper ends of the left vertical beam metal part 13 and the right vertical beam metal part 15 are respectively provided with overlap. Part 21, the overlapping part 21 is provided with a pre-deformed semi-circular buckle 22. The overlapping part 21 includes an upwardly protruding convex plate 211 and a downwardly bent folded plate 212. The pre-deformed semi-circular buckle 22 is provided at the bend of the flat plate 211 and the folded plate 212. The two ends of the upper crossbeam metal part (12) are provided with raised parts A. The convex plate 211 and the folded plate 212 overlap on the raised parts A. The pre-deformed semi-circular buckle 22 cooperates with the pre-deformed semi-circular groove 20. When the product is formed, the plastic part shrinks. Under the action of the shrinkage force, the pre-deformed semi-circular buckle 22 and the pre-deformed semi-circular groove 20 change, so that the left upright metal part 13 and the right upright metal part 15 are displaced from the upper crossbeam metal part 12, and the shrinkage rate of the plastic part is automatically adjusted.

[0011] During the production process, the overlapping parts 21 of the left upright metal part 13 and the right upright metal part 15 overlap on the two ends of the upper crossbeam metal part 12 and are positioned by the pre-deformed semi-circular buckle 22 and the pre-deformed semi-circular groove 20. They are not fixedly welded, meaning that the upper crossbeam metal part 12, the left upright metal part 13, and the right upright metal part 15 are three independent individuals. After the product is injection molded, the plastic part covering the upper crossbeam metal part 12, the left upright metal part 13, and the right upright metal part 15 will shrink. Under the action of shrinkage force, the position of the pre-deformed semi-circular buckle 22 and the pre-deformed semi-circular groove 20 will change, causing the left upright metal part 13 and the right upright metal part 15 to shift relative to the upper crossbeam metal part 12. This automatically adjusts the shrinkage rate of the plastic part, achieving the purpose of deformation compensation, reducing the amount of plastic part deformation, improving product quality, and reducing production costs.

[0012] The upper crossbeam metal part 12, the left vertical beam metal part 13, and the right vertical beam metal part 15 are each provided with a number of insert positioning holes 25, and the core insert 11 is provided with corresponding insert positioning pads 26. The insert positioning holes 25 and the insert positioning pads 26 cooperate with each other, making it convenient and reliable to position the upper crossbeam metal part, the left vertical beam metal part, and the right vertical beam metal part when placing them.

Claims

1. A front-end frame mold for automobiles with pre-deformation compensation of iron parts, comprising a cavity plate (1) and a core plate (2), a pad (3) is provided under the cavity plate, a runner frame (5) is provided in the pad, a hot nozzle (6) is connected under the runner frame, a cavity frame (7) is provided under the pad, a cavity insert (8) is provided in the cavity frame, a mold foot (9) is provided on the core plate, a core plate (10) is provided on the mold foot, a core insert (11) is provided on the core plate, the core insert and the cavity insert cooperate to form a mold cavity, the hot nozzle is connected to the mold cavity, and an insert (01) is provided in the mold cavity, the insert (01) comprising an upper crossbeam metal part (12), a left vertical beam metal part (13) and a right vertical beam metal part (15), characterized in that: The upper crossbeam metal part (12) is provided with pre-deformed semi-circular grooves (20) at both ends. The upper ends of the left vertical beam metal part (13) and the right vertical beam metal part (15) are each provided with an overlapping part (21). The overlapping part (21) is provided with a pre-deformed semi-circular buckle (22). The overlapping part (21) includes an upwardly protruding convex plate (211) and a downwardly bent folded plate (212). The pre-deformed semi-circular buckle (22) is provided at the bend between the flat plate (211) and the folded plate (212). The upper crossbeam metal part ( 12) has raised points A at both ends, with the convex plate (211) and the folded plate (212) overlapping on the raised points A. The pre-deformed semi-circular buckle (22) and the pre-deformed semi-circular groove (20) are matched and not fixedly welded. When the product is formed, the plastic part shrinks. Under the action of shrinkage force, the pre-deformed semi-circular buckle (22) and the pre-deformed semi-circular groove (20) change, causing the left upright metal part (13) and the right upright metal part (15) to shift with the upper crossbeam metal part (12), automatically adjusting the shrinkage rate of the plastic part to achieve the purpose of deformation compensation.

2. The automotive front-end frame mold with pre-deformation compensation for iron parts as described in claim 1, characterized in that... The upper crossbeam metal part (12), the left vertical beam metal part (13) and the right vertical beam metal part (15) are each provided with a number of insert positioning holes (25), and the core insert (11) is provided with corresponding insert positioning pads (26), and the insert positioning holes (25) cooperate with the insert positioning pads (26).

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