JP-7855880-B2 - Molding system and molding method

JP7855880B2JP 7855880 B2JP7855880 B2JP 7855880B2JP-7855880-B2

Inventors

鈴木海彦
杉野剛大

Assignees

新東工業株式会社

Dates

Publication Date: 20260511
Application Date: 20220316

Claims (11)

A molding system for creating sand molds, Casting frame and A tank connected to a compressed air source, with an open end, and containing sand inside, A nozzle attached to the end of the tank, which guides the sand inside the tank into the casting frame, During sand filling, in which sand from the tank is introduced into the mold via the nozzle, a control unit outputs information regarding nozzle clogging when the pressure inside the tank is higher than a pre-stored pressure during sand filling when the nozzle is not clogged . A molding system equipped with the following features.
A molding system for creating sand molds, Casting frame and A tank connected to a compressed air source, with an open end, and containing sand inside, A nozzle attached to the end of the tank, which guides the sand inside the tank into the casting frame, Equipped with, During sand filling, in which sand from the tank is introduced into the casting frame via the nozzle, a control unit outputs information regarding nozzle clogging when the change in pressure inside the tank over time from the start of sand filling is larger than the change in pressure over time from the start of sand filling during sand filling when the nozzle is not clogged, which is stored in advance. A molding system equipped with the following features.
The molding system according to claim 1 or 2, wherein the control unit performs an operation to clear the nozzle blockage when the above relationship is satisfied.
The molding system according to any one of claims 1 to 3, wherein the control unit issues an alarm when the above relationship is satisfied.
The device includes an analysis apparatus that images the sand mold and performs an external inspection of the sand mold based on the captured image, The molding system according to any one of claims 1 to 4, wherein the control unit outputs the information to the analysis device when the relationship is satisfied.
The molding system according to claim 5, further comprising an external force application device that applies pneumatic pressure to the sand mold before imaging the sand mold, when the analysis device acquires the information from the control unit.
The molding system according to claim 5 or 6, wherein the analysis device is configured to switch between a standard mode for imaging the sand mold at a first magnification and a high-magnification mode for imaging the sand mold at a magnification higher than the first magnification, and when the information is acquired from the control unit, the sand mold is imaged at least in the high-magnification mode.
A squeeze mechanism for squeezing the sand filled in the mold, A sand cutter for shaping the sand mold, A pressure sensor that detects squeeze pressure, Equipped with, The control unit determines, based on the detection result of the pressure sensor, whether the squeeze by the squeeze mechanism has been completed successfully. The molding system according to any one of claims 1 to 7, wherein the sand cutter changes its operation depending on whether or not the nozzle is clogged and whether or not the squeeze has been completed successfully.
The aforementioned sand cutter is If the above relationship is not satisfied and the control unit determines that the squeeze has been completed successfully, the relative speed between the sand mold and the blade will be set to the first speed. The molding system according to claim 8, wherein if the above relationship is satisfied and the control unit determines that the squeeze has not been completed normally, the relative speed between the sand mold and the blade is operated to a second speed lower than the first speed.
A process of introducing sand from a tank connected to a compressed air source, with an open end and containing sand, into a casting mold via a nozzle attached to the end of the tank, In the process of introducing the material into the mold, when the pressure inside the tank is higher than the pressure during sand filling when the nozzle is not clogged, which is stored in advance, the process of outputting information regarding the nozzle clogging is performed. A molding method comprising the following features.
A process of introducing sand from a tank connected to a compressed air source, with an open end and containing sand, into a casting mold via a nozzle attached to the end of the tank, In the process of introducing the material into the mold, when the change in pressure inside the tank over time from the start of sand filling is greater than the change in pressure over time from the start of sand filling during sand filling when the nozzle is not clogged (a value that has been stored in advance) , the process of outputting information regarding the nozzle clogging is performed. A molding method comprising the following features.

Description

This disclosure relates to a molding system and a molding method. Patent Document 1 discloses a molding apparatus. This apparatus comprises a tank for storing sand and a nozzle for guiding the sand from the tank into a mold. Compressed air is supplied to the tank, and the pressure causes the sand in the tank to be supplied to the mold via the nozzle. The pressure in the tank is detected by a pressure sensor, and a graph showing the relationship between pressure and time is displayed on a screen. If the pressure detected by the sensor exceeds a preset threshold, the operator determines that a nozzle blockage has occurred. International Publication No. 2018/207646 This figure shows an example of the configuration of a casting system equipped with a molding system according to the embodiment.Figure 1 is a block diagram of the molding system.This is a longitudinal cross-sectional view showing the state of the 3D printer before the start of the molding operation (in its original position).This is a longitudinal cross-sectional view showing the state of a molding machine in which a molding space has been formed and the space has been filled with sand.This is a longitudinal cross-sectional view showing the state of the molding machine during the squeeze process.This is a longitudinal cross-sectional view showing the state of the molding machine returning to its original position after die cutting.This is a front view of the sand cutter.This is a view along the line VIII-VIII in Figure 7.This graph shows the initial pressure change in the sand tank and the pressure change at the time of detection. The embodiments of this disclosure will be described below with reference to the drawings. In the following description, identical or equivalent elements will be denoted by the same reference numerals, and redundant descriptions will not be repeated. The dimensional ratios in the drawings do not necessarily correspond to those in the description. The terms "top," "bottom," "left," and "right" are based on the illustrated states and are for convenience only. [An example of a casting system] Figure 1 shows an example of the configuration of a casting system equipped with a molding system according to an embodiment. The casting system 100 shown in Figure 1 is a system for manufacturing castings. As shown in Figure 1, the casting system 100 includes a molding machine 2, a transport line 3, a sand cutter 4, an analysis device 5, and a line control unit 6 (an example of a control unit). In the figure, the X and Y directions are horizontal directions, and the Z direction is vertical direction. The X, Y, and Z directions are mutually orthogonal axis directions in a three-dimensional orthogonal coordinate system. The molding machine 2 is a device for manufacturing sand molds M. The molding machine 2 forms the sand mold M using a casting frame F. The molding machine 2 is communicatively connected to the line control unit 6. Upon receiving a molding start signal from the line control unit 6, the molding machine 2 begins manufacturing the sand mold M in the molding area. The molding machine 2 pours sand (foundry sand) into the casting frame F where the model (pattern) is placed, and then pressurizes and compacts the sand within the casting frame F. The molding machine 2 forms the sand mold M by removing the pattern from the compacted sand. The sand mold M is either an upper mold or a lower mold, which are part of a pair. The transport line 3 is equipment for transporting sand molds M from upstream to downstream. The transport line 3 receives the sand molds M from the molding machine 2 and transports them toward the pouring machine (not shown) downstream. The transport line 3 may include, for example, a roller conveyor, rails, a trolley on which the sand molds M and casting frames F are placed and which travels along the rails, a pusher device located on the molding machine 2 side, and a cushioning device located on the pouring machine side. If the transport line 3 has drive rollers, a roller running surface is provided on the base plate B. The transport line 3 sequentially transports multiple sand molds M and casting frames F arranged at equal intervals on the roller conveyor or rails from the molding machine 2. The transport line 3 operates intermittently, transporting the sand molds M and casting frames F in predetermined frame portions. The predetermined frame portion may be one frame or multiple frames. The transport line 3 is connected to the line control unit 6 in a communication manner. The transport line 3 transports a predetermined number of sand molds M and casting frames F in response to receiving a frame feed signal from the line control unit 6. When the transport line 3 has completed transporting the predetermined number of frames, it transmits a frame feed completion signal to the line control unit 6. The sand cutter 4 is installed on the conveying line 3 and adjusts the shape of the sand mold M. The sand cutter 4 adjus