A steam-formed hot mold for a front underbody protection plate

Abstract

This utility model relates to the field of hot mold technology for front bottom guard plate forming, and discloses a steam forming hot mold for a front bottom guard plate, including an upper mold shell, a lower mold shell at the bottom of the upper mold shell, and oil injection ports on the edges of both the upper and lower mold shells, with a metering mechanism installed on the surface of the oil injection ports. This steam forming hot mold for a front bottom guard plate, through the setting of a pressure detection mechanism, allows the hydraulic rod to extend and retract during use, driving the upper mold body inside the upper mold shell to press and form the workpiece directly below. At this time, an infrared laser rangefinder is set at the bottom of the upper mold shell. The infrared laser rangefinder emits infrared light, which is reflected by the surface of the lower mold shell and received by the rangefinder. The time difference between emission and reception is calculated by the PLC controller B to accurately measure the real-time distance between the upper and lower molds, ensuring consistent pressing force each time and avoiding pressure fluctuations that could affect product quality.

Description

Technical Field

[0001] This utility model relates to the field of hot mold technology for front underbody protection plate forming, and in particular to a steam forming hot mold for front underbody protection plate. Background Technology

[0002] In the steam forming process of automotive front underbody protection plates, the steam forming hot mold heats the mold with high-temperature steam (typically between 120-180℃) and applies high pressure of 5-10MPa to force the plastic sheet to conform to the mold cavity. However, in actual production, abnormal pressure situations frequently occur. Excessive pressure can not only cause structural damage to the mold, such as cavity deformation, guide post wear, or even mold cracking, but also result in product quality defects, such as uneven plate wall thickness, localized flash, or excessive material compression leading to internal stress concentration, making the material prone to cracking during subsequent use. In addition, overpressure can also cause steam pipe ruptures, hydraulic system leaks, and other equipment safety hazards, posing a threat to the safety of operators. Traditional pressure control mainly relies on pressure sensors in hydraulic systems, with an accuracy of ±0.5MPa. However, these sensors suffer from response lag, requiring 0.3-0.5 seconds for hydraulic pressure to be transmitted to the mold, making it impossible to capture instantaneous overpressure, such as pressure fluctuations during steam injection, in real time. Furthermore, pressure sensors can only monitor hydraulic system pressure and cannot reflect the actual stress distribution on the mold. When mold eccentricity causes localized overpressure, it is difficult to monitor effectively. Therefore, a steam-forming hot mold for the front bottom guard plate is proposed. Utility Model Content

[0003] (a) Technical problems to be solved The purpose of this invention is to provide a steam-formed hot mold for a front underbody protection plate, in order to solve the problem mentioned in the background art that traditional pressure control mainly relies on the pressure sensor of the hydraulic system, which has an accuracy of ±0.5MPa, but suffers from response lag.

[0004] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a steam-formed hot mold for a front bottom guard plate, comprising an upper mold shell, a lower mold shell at the bottom of the upper mold shell, oil injection ports on the edges of both the upper and lower mold shells, a metering mechanism mounted on the surface of the oil injection port, and a pressure detection mechanism mounted on the surface of the upper mold shell. The metering mechanism includes a flow meter mounted on the surface of the oil injection port, one side of the flow meter being electrically connected to a PLC controller A via a power cord, and one side of the PLC controller A being electrically connected to a small electromagnetic metering pump via a power cord. The pressure detection mechanism includes an infrared laser rangefinder mounted on the surface of the upper mold shell, one side of the infrared laser rangefinder being electrically connected to a PLC controller B via a power cord, and one side of the PLC controller B being electrically connected to an alarm light via a power cord.

[0005] As a further embodiment of this utility model, an upper mold body is installed inside the upper mold shell, and a lower mold body is installed inside the lower mold shell. The lower mold shell serves to protect the lower mold body.

[0006] As a further embodiment of this utility model, connecting blocks are provided around the outer shell of the upper mold, and hydraulic rods are fixedly connected to the bottom of the connecting blocks. The hydraulic rods are used to drive the upper mold body to move.

[0007] As a further embodiment of this utility model, the bottom of the hydraulic rod is fixedly connected to the surface of the lower mold shell, and an oil pipe is connected through the end of the oil injection port. The oil pipe serves to transport oil.

[0008] As a further embodiment of this utility model, the surfaces of both the upper mold shell and the lower mold shell are provided with a plurality of heat dissipation holes, which penetrate the interior of the upper mold body and the lower mold body, thereby achieving the function of heat dissipation.

[0009] As a further embodiment of this utility model, a plurality of pull rings are fixedly connected to the surfaces of the upper mold shell and the lower mold shell. The surfaces of the pull rings are coated with a corrosion-resistant coating, which provides corrosion resistance.

[0010] As a further embodiment of this utility model, the surface of the lower mold shell is provided with a threaded hole, and the threaded hole is internally connected with a threaded post. The threaded post serves to fix the lower mold shell.

[0011] (III) Beneficial Effects This utility model provides a steam forming hot mold for a front bottom guard plate, which has the following beneficial effects: 1. The front bottom guard plate steam forming hot mold, through the setting of the pressure detection mechanism, when in use, the hydraulic rod extends and retracts to drive the upper mold body inside the upper mold shell to stamp and form the workpiece directly below. At this time, an infrared laser rangefinder is set at the bottom of the upper mold shell. The infrared laser rangefinder emits infrared light, which is reflected by the surface of the lower mold shell and received by the rangefinder. The PLC controller B calculates the time difference between emission and reception to accurately measure the real-time distance between the upper and lower molds, ensuring that the pressing force is consistent each time and avoiding pressure fluctuations that affect product quality.

[0012] 2. This front bottom guard plate steam forming hot mold, through the setting of the metering mechanism, requires heating oil or cooling oil to be introduced into the upper mold body and the lower mold body during use to assist in mold temperature control. Therefore, a flow meter is installed on the surface of the oil injection port to detect the oil flow in real time. In addition, the PLC controller A on the side of the flow meter can control the operation of the small electromagnetic metering pump in real time, realizing precise closed-loop control and dynamic adjustment of mold temperature, effectively improving the temperature stability of the front bottom guard plate steam forming, and reducing quality defects such as product deformation and weld lines caused by temperature deviation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model; Figure 3 This is a schematic diagram of the pressure detection mechanism of this utility model; Figure 4 This is a schematic diagram of the quantitative mechanism structure of this utility model.

[0014] In the diagram: 1. Upper mold housing; 2. Lower mold housing; 3. Oil inlet; 4. Metering mechanism; 401. Flow meter; 402. PLC controller A; 403. Small electromagnetic metering pump; 5. Pressure detection mechanism; 501. Infrared laser rangefinder; 502. PLC controller B; 503. Alarm light; 6. Upper mold body; 7. Lower mold body; 8. Connecting block; 9. Hydraulic rod; 10. Oil pipe; 11. Pull ring; 12. Threaded column. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] Please see Figures 1 to 4This utility model provides a technical solution: a steam forming hot mold for a front bottom guard plate, including an upper mold shell 1, a lower mold shell 2 at the bottom of the upper mold shell 1, oil injection ports 3 on the sides of both the upper mold shell 1 and the lower mold shell 2, and a metering mechanism 4 installed on the surface of the oil injection port 3. The metering mechanism 4 effectively improves the temperature stability of the steam forming of the front bottom guard plate and reduces quality defects such as product deformation and weld lines caused by temperature deviation. A pressure detection mechanism 5 is installed on the surface of the upper mold shell 1. The pressure detection mechanism 5 avoids pressure fluctuations that could affect product quality. The metering mechanism 4 includes a flow meter 401 installed on the surface of the oil inlet 3. A PLC controller A402 is electrically connected to one side of the flow meter 401 via a power line. A small electromagnetic metering pump 403 is electrically connected to one side of the PLC controller A402 via a power line. The pressure detection mechanism 5 includes an infrared laser rangefinder 501 mounted on the surface of the upper mold housing 1. One side of the infrared laser rangefinder 501 is electrically connected to a PLC controller B502 via a power cord. One side of the PLC controller B502 is electrically connected to an alarm light 503 via a power cord. The upper mold body 6 is installed inside the upper mold shell 1, and the lower mold body 7 is installed inside the lower mold shell 2. The lower mold shell 2 serves to protect the lower mold body 7. Connecting blocks 8 are provided around the outer shell 1 of the upper mold. A hydraulic rod 9 is fixedly connected to the bottom of the connecting block 8. The hydraulic rod 9 is used to drive the upper mold body 6 to move. The bottom of the hydraulic rod 9 is fixedly connected to the surface of the lower mold housing 2, and the end of the oil injection port 3 is connected to the oil pipe 10. The oil pipe 10 is used to transport oil. The surfaces of the upper mold shell 1 and the lower mold shell 2 are provided with several heat dissipation holes. The heat dissipation holes penetrate the interior of the upper mold body 6 and the lower mold body 7. The heat dissipation holes serve to dissipate heat. Several pull rings 11 are fixedly connected to the surfaces of the upper mold shell 1 and the lower mold shell 2. The surface of the pull rings 11 is coated with a corrosion-resistant coating, which plays a role in corrosion resistance. The surface of the lower mold housing 2 is provided with a threaded hole, and a threaded post 12 is threaded inside the threaded hole. The threaded post 12 serves to fix the lower mold housing 2.

[0017] In this invention, the working steps of the device are as follows: First step: During use, the hydraulic rod 9 extends and retracts, driving the upper mold body 6 inside the upper mold shell 1 to press and form the workpiece directly below. At this time, an infrared laser rangefinder 501 is set at the bottom of the upper mold shell 1. The infrared laser rangefinder 501 emits infrared light, which is reflected by the surface of the lower mold shell 2 and received by the rangefinder. The PLC controller B502 calculates the time difference between emission and reception to accurately measure the real-time distance between the upper and lower molds, ensuring that the pressing force is consistent each time. The second step: In order to assist in mold temperature control during use, heating oil or cooling oil needs to be introduced into the upper mold body 6 and the lower mold body 7. Therefore, a flow meter 401 is installed on the surface of the oil inlet 3 to detect the oil flow rate in real time. In addition, the PLC controller A402 on one side of the flow meter 401 can control the operation status of the small electromagnetic metering pump 403 in real time, realizing precise closed-loop control and dynamic adjustment of mold temperature.

[0018] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, under the premise that those skilled in the art understand the principle of the above utility model, the specific details of its power mechanism, power supply system and control system can be clearly understood. The control method in the application document is automatic control through a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A front underguard steam forming hot die comprising an upper die housing (1), characterized in that: The bottom of the upper mold shell (1) is provided with a lower mold shell (2). Both the upper mold shell (1) and the lower mold shell (2) are provided with oil injection ports (3). A metering mechanism (4) is installed on the surface of the oil injection port (3). A pressure detection mechanism (5) is installed on the surface of the upper mold shell (1). The metering mechanism (4) includes a flow meter (401) installed on the surface of the oil inlet (3). One side of the flow meter (401) is electrically connected to a PLC controller A (402) via a power line. One side of the PLC controller A (402) is electrically connected to a small electromagnetic metering pump (403) via a power line. The pressure detection mechanism (5) includes an infrared laser rangefinder (501) installed on the surface of the upper mold housing (1). One side of the infrared laser rangefinder (501) is electrically connected to a PLC controller B (502) via a power line. One side of the PLC controller B (502) is electrically connected to an alarm light (503) via a power line.

2. A front underguard steam forming hot die according to claim 1, characterized in that: The upper mold body (6) is installed inside the upper mold shell (1), and the lower mold body (7) is installed inside the lower mold shell (2).

3. A front underguard steam forming hot die according to claim 1, characterized in that: Connecting blocks (8) are provided around the upper mold shell (1), and hydraulic rods (9) are fixedly connected to the bottom of the connecting blocks (8).

4. A front underguard steam forming hot die according to claim 3, characterized in that: The bottom of the hydraulic rod (9) is fixedly connected to the surface of the lower mold shell (2), and the end of the oil injection port (3) is connected to an oil pipe (10).

5. The pre-sole and insole steam forming hot die according to claim 1, wherein: The surfaces of the upper mold shell (1) and the lower mold shell (2) are provided with a number of heat dissipation holes, which penetrate the interior of the upper mold body (6) and the lower mold body (7).

6. A front underguard steam forming hot die according to claim 1, characterized in that: Several pull rings (11) are fixedly connected to the surfaces of the upper mold shell (1) and the lower mold shell (2), and the surfaces of the pull rings (11) are coated with a corrosion-resistant coating.

7. The pre-sole and insole steam forming hot die according to claim 1, wherein: The surface of the lower mold housing (2) is provided with a threaded hole, and the threaded hole is internally connected with a threaded post (12).

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