JP7316182B2 - Molding machine - Google Patents

Description

The present invention relates to a molding machine that injects a molding material into a mold to mold a molded product.

Conventionally, there has been known a molding machine in which a rotary table on which a plurality of lower molds are mounted is intermittently rotated to alternately stop a plurality of lower molds at positions facing an upper mold. (See, for example, Patent Document 1).

By attaching different lower molds to such a molding machine, different molded products can be molded in parallel. Also, if the same lower mold is installed, one lower mold can be used to mold the product while the other lower mold is removing the product, shortening the molding cycle. can do.

Japanese Patent Application Laid-Open No. 2008-284778

The plurality of lower molds mounted on the rotary table are in different states (for example, malfunctions, lifespans). However, in conventional molding machines, it is common to carry out an upper mold and a lower mold as a set. Therefore, in order to check the condition of some of the lower molds, it is difficult to say that it is efficient to always transport them together with the upper molds as a set.

The present invention has been made to solve such problems of the prior art. It is to provide a technique that can be confirmed in a realistic manner.

In order to solve the above problems, the present invention provides a mold clamping device for opening, closing, and clamping a mold including an upper mold and a plurality of lower molds, and a molding material in the cavity of the clamped mold. a mold loading/unloading device for loading/unloading the mold to/from the mold clamping device; and a control device for controlling the mold clamping device, the injection device, and the mold loading/unloading device , the mold clamping device rotates while supporting the plurality of lower molds at positions spaced apart in the circumferential direction, and removes the molded product from a molding position facing the upper mold. a rotary table for moving the lower mold between a molded article unloading position and a mold exchange position for unloading the mold from the mold clamping device; the upper mold and the lower mold at the molding position; an opening/closing mechanism for opening/closing and clamping the mold; and a core insertion/removal mechanism for inserting/removing the core forming the cavity together with the clamped upper and lower molds into/from the lower mold. and a core sensor that detects the position of the core in the lower mold, and the control device selects the lower mold among the plurality of lower molds that satisfies mold unloading conditions. The presence or absence is determined, and the rotary table is rotated to move the lower mold determined to satisfy the mold carry-out condition to the mold replacement position while being separated from the upper mold. The mold loading/unloading device is caused to carry out the lower mold at the mold exchange position, and before the molded product is taken out at the molded product unloading position, the core inserting/removing mechanism removes the core from the lower mold. and before being carried out by the mold loading/unloading device at the mold exchange position, the core insertion/extraction mechanism is caused to insert the core into the lower mold, and the core is inserted by the core sensor. It is characterized in that the lower mold at the mold exchange position is carried out by the mold loading/unloading device after it is detected.

According to the present invention, one of the plurality of lower molds can be carried out in a state separated from the upper mold. status can be checked efficiently.

It is a side view of the injection molding machine concerning this embodiment. It is an enlarged view around a mold. It is a schematic plan view of a rotary table and a mold loading/unloading device. It is a hardware block diagram of an injection molding machine. It is a flow chart of mold carry-out processing. It is a flow chart of mold carry-in processing. It is a state transition diagram of the rotary table in the mold unloading process. It is a state transition diagram of the rotary table in the mold loading process.

An injection molding machine 10 according to the present invention will be described below with reference to the drawings. It should be noted that the embodiments of the present invention described below are merely examples of embodying the present invention, and the scope of the present invention is not limited to the scope of the description of the embodiments. Therefore, the present invention can be implemented by adding various changes to the embodiments.

FIG. 1 is a side view of an injection molding machine 10 according to this embodiment. FIG. 2 is an enlarged view of the mold 11 and its surroundings. FIG. 3 is a schematic plan view of the rotary table 22 and the mold loading/unloading device 40. FIG. FIG. 4 is a hardware configuration diagram of the injection molding machine 10. As shown in FIG.

The injection molding machine 10 is a molding machine that injects a plasticized resin (molding material) into a mold 11 to mold an injection-molded product (molded product). As shown in FIGS. 1 to 4, the injection molding machine 10 mainly includes a mold clamping device 20, an injection device 30, a mold loading/unloading device 40, and a control device .

As shown in FIGS. 1 and 2, the mold 11 mounted on the injection molding machine 10 includes an upper mold 12 and a plurality of lower molds 13a and 13b (hereinafter collectively referred to as "lower molds"). It is composed of a mold 13” and a core 14. As shown in FIG. 2(A), an upper mold 12, one of a plurality of lower molds 13a and 13b, and a core 14 corresponding to the lower mold 13 are combined to form a metal mold. A cavity 15 is formed inside the mold 11 . An injection-molded product is formed by injecting the plasticized resin into the cavity 15 .

The mold clamping device 20 opens and closes the mold 11 and clamps the mold. As shown in FIGS. 1, 2, and 4, the mold clamping device 20 includes a movable die plate 21 that supports the upper mold 12, a rotary table 22 that supports the plurality of lower molds 13a and 13b, It mainly includes a table rotation motor 23 , an opening/closing motor (opening/closing mechanism) 24 , a plurality of core cylinders (core insertion/extraction mechanism) 25 , a plurality of core sensors 26 , and a plurality of autocouplers 27 .

The rotary table 22 is arranged below the movable die plate 21 (in other words, the upper die 12). The rotary table 22 supports the plurality of lower molds 13a and 13b at circumferentially spaced positions. More specifically, the plurality of lower molds 13a and 13b are arranged on the upper surface of the rotary table 22 at regular intervals (that is, at intervals of 180°).

The rotary table 22 also includes a mag clamp (electromagnet) that fixes the lower die 13 . That is, when the controller 50 to be described later applies a voltage to the mag clamp, the lower die 13 is fixed on the rotary table 22 . On the other hand, when the control device 50 stops applying voltage to the mag clamp, the fixation of the lower die 13 to the rotary table 22 is released.

Further, as shown in FIG. 3, the rotary table 22 rotates on the horizontal plane by transmission of the driving force of the table rotating motor 23, thereby moving the rotary table 22 to the molding position facing the upper mold 12 and the injection molded product to be taken out. The lower mold 13 is moved between the removal position and the mold exchange position where the mold 11 is carried in and out with the mold loading/unloading device 40 .

The molding position and the demolding position are 180° apart. That is, when one of the lower molds 13a and 13b is placed at the molding position, the other is placed at the molded article removal position. On the other hand, the mold exchange position is a position spaced 270° counterclockwise from the molding position (90° counterclockwise from the molded article removal position). However, the specific positional relationship among the molding position, the molded article removal position, and the mold exchange position is not limited to the above example.

Further, the movable die plate 21 is moved vertically by transmission of the driving force of the open/close motor 24 via a toggle link mechanism (not shown). When the movable die plate 21 descends, the upper mold 12 and the lower mold 13 at the molding position are closed. When the movable die plate 21 is further lowered, the upper mold 12 and the lower mold 13 are clamped. On the other hand, when the movable die plate 21 rises, the upper mold 12 and the lower mold 13 at the molding position are opened.

As shown in FIG. 2, the core cylinder 25 is fixed to each of the plurality of lower molds 13a and 13b. As shown in FIG. 2 , the core cylinder 25 expands and contracts to insert and remove the core 14 with respect to the lower mold 13 . More specifically, the core cylinder 25 inserts the core 14 into the lower mold 13 up to the entry limit shown in FIGS. The core 14 is removed from the lower mold 13 .

As shown in FIG. 2A, a cavity 15 is formed in the mold 11 by clamping the upper mold 12 and the lower mold 13 with the core 14 placed at the entry limit. On the other hand, as shown in FIG. 2(C), when the core 14 is arranged at the return limit with the upper mold 12 and the lower mold 13 opened, the injection-molded product molded in the cavity 15 is taken out. be possible. However, when the upper mold 12 and the lower mold 13 are closed with the core 14 arranged at the return limit, the upper mold 12 and the core 14 interfere with each other.

The core sensor 26 is attached to each of the plurality of lower molds 13a and 13b. The core sensor 26 detects the position of the core 14 in the lower mold 13 and outputs a detection signal indicating the detection result to the control device 50 . More specifically, the detection signal of core sensor 26 is output to control device 50 through autocoupler device 27 connected to adapter 16 .

Although FIG. 2 shows the core sensor 26 as if it were embedded in the lower mold 13, the specific arrangement of the core sensor 26 is not limited to this. For example, the core sensor 26 may be attached to the core cylinder 25 fixed to the lower die 13 to detect the amount of expansion and contraction of the rod of the core cylinder 25 .

The auto coupler device 27 is fixed to the rotary table 22 in association with each of the plurality of lower molds 13a and 13b on the rotary table 22. As shown in FIG. The auto coupler device 27 connects the lower mold 13 and each part of the injection molding machine 10 (for example, the control device 50 and the temperature control device) via the adapter 16 . That is, the auto coupler device 27 bundles signal lines and piping to be connected to the lower mold 13 and attaches/detach to/from the adapter 16 .

As an example, the position of the core 14 detected by the core sensor 26 can be output to the control device 50 by connecting the core sensor 26 and the control device 50 with a signal line. As another example, the temperature of the lower mold 13 is adjusted by connecting the lower mold 13 and a temperature control device with a pipe. On the other hand, by removing the auto coupler device 27 from the adapter 16 , the connection between the signal line or piping and the lower die 13 is released, and the lower die 13 can be carried out from the rotary table 22 .

The auto coupler device 27 is detachably attached to the adapter 16 by a motor (not shown). More specifically, the auto-coupler device 27 is attached to the adapter 16 as shown in FIGS. 2A and 2B, and removed from the adapter 16 as shown in FIG. 2C. It is configured to be movable along the upper surface of the rotary table 22 between the positions. Although not shown, the injection molding machine 10 also includes an auto coupler device that can be attached to and detached from the upper mold 12 .

The injection device 30 plasticizes the resin supplied from a hopper (not shown), weighs it, and injects it into the cavity 15 . The injection device 30 according to this embodiment is arranged above the mold clamping device 20 . More specifically, the injection device 30 mainly includes a heating cylinder 31 having a nozzle 32 formed at its tip, and a nozzle touch motor 33 for vertically moving the heating cylinder 31 .

When the heating cylinder 31 descends, the nozzle 32 is connected to the clamped mold 11 . The plasticized resin injected from the heating cylinder 31 in this state fills the cavity 15 of the mold 11 . On the other hand, when the heating cylinder 31 is raised, the nozzle 32 is separated from the mold 11 . That is, the injection molding machine 10 according to this embodiment is a so-called "vertical type" in which the heating cylinder 31 moves vertically. However, the present invention can also be applied to a so-called "horizontal type" in which the heating cylinder 31 moves horizontally.

The mold loading/unloading device 40 is a device for loading/unloading the mold 11 with respect to the mold clamping device 20 . As shown in FIG. 3, the mold loading/unloading device 40 includes a rotary table 41 that supports and rotates preliminary molds 17a and 17b (these are collectively referred to as "preliminary molds 17"), It mainly includes a table rotating motor 42 and a conveyor 43 that conveys the mold between the rotary tables 22 and 41 .

The preliminary molds 17a, 17b are molds that can replace the lower molds 13a, 13b. That is, the preliminary molds 17 a and 17 b are lower molds that form the cavity 15 by being clamped by the upper mold 12 supported by the movable die plate 21 . However, the preliminary molds 17a, 17b may have the same shape as the lower molds 13a, 13b, or may have a different shape. The preliminary molds 17a and 17b placed on the rotary table 41 are in a state in which the upper mold 12 is not included, the core 14 is inserted, and the auto coupler device 27 is removed.

The rotary table 41 is configured to be able to support one more mold than the number of lower molds 13 supported by the rotary table 22 . That is, on the rotary table 41, two preliminary molds 17a and 17b and a receiving area 44 for receiving the mold 11 carried out from the rotary table 22 are arranged in the circumferential direction. The rotary table 41 is rotated by transmission of the driving force of the table rotating motor 42 .

Then, when the receiving area 44 faces the conveyor 43 and the conveyor 43 is rotated in the direction in which the mold 11 is carried out from the rotary table 22 , the mold 11 is transferred from the rotary table 22 to the rotary table 41 . On the other hand, when the preliminary mold 17 is made to face the conveyor 43 and the conveyor 43 is rotated in the direction to carry out the preliminary mold 17 from the rotary table 41, the preliminary mold 17 is transferred from the rotary table 41 to the rotary table 22. .

The control device 50 controls the operation of the injection molding machine 10 as a whole. The control device 50 acquires a detection signal output from the core sensor 26 and an operation signal output from the display input device 54 . The control device 50 drives each actuator (the table rotation motors 23 and 42, the open/close motor 24, the core cylinder 25, the auto coupler device 27, the nozzle touch motor 33, and the conveyor 43) based on the acquired various signals.

The control device 50 includes, for example, a CPU (Central Processing Unit) 51 that is a calculation means, a ROM (Read Only Memory) 52 that stores various programs, and a RAM (Random Access Memory) 53 that is a work area for the calculation means. Then, the CPU 51 may read out and execute the programs stored in the ROM 52 to realize each process described later.

However, the specific configuration of the control device 50 is not limited to this, and may be implemented by hardware such as ASIC (Application Specific Integrated Circuit) and FPGA (Field-Programmable Gate Array).

The display input device 54 is a user interface including a display for displaying various information to be notified to the operator, and buttons, switches, dials, etc. for receiving operations by the operator. The display input device 54 may also include a touch panel superimposed on the display. It receives an operator's operation and outputs an operation signal corresponding to the received operation to the control device 50 .

FIG. 5 is a flow chart of the mold unloading process. FIG. 7 is a state transition diagram of the rotary tables 22 and 41 in the mold unloading process. The control device 50 executes the mold unloading process, for example, at the timing when a molding instruction for a predetermined number (for example, 1000) of injection-molded articles is obtained. The molding instruction may be given by an operator through the display input device 54, or may be received from an external device through a communication interface (not shown).

In addition, in the flowchart of FIG. 5, the processing is mainly described for one of the plurality of lower molds 13a and 13b (lower mold 13a). Also, as shown in FIG. 7A, the lower mold 13a is assumed to be positioned at the molding position at the start of the mold unloading process. Further, it is assumed that the core 14 is inserted into the lower mold 13a and the autocoupler device 27 is connected to the adapter 16. As shown in FIG.

First, the control device 50 closes and clamps the upper mold 12 and the lower mold 13a at the molding position by driving the open/close motor 24 (S11). Next, the control device 50 causes the injection device 30 to inject the plasticized resin into the clamped mold 11 to form an injection-molded product. Then, the control device 50 opens the upper mold 12 and the lower mold 13a by driving the open/close motor 24 (S12). At this point, the injection molded product is held by the lower mold 13a.

Next, the control device 50 drives the table rotation motor 23 to move the lower mold 13a to the molded article unloading position as shown in FIG. 7B (S13). Next, the control device 50 removes the core 14 from the lower mold 13a by driving the core cylinder 25 (S14). Next, the control device 50 takes out the injection-molded product from the lower mold 13a (S15). For example, in step S15, the control device 50 may cause the robot arm (not shown) to take out the injection-molded product from the lower mold 13a.

Next, the control device 50 sums up the molding result of the injection-molded product by the lower mold 13a (S16). For example, in step S16, the control device 50 sums up the ratio of defective products among the injection-molded products molded using the lower mold 13a (hereinafter referred to as "defective product rate") as a molding result. good too. Defectives refer to injection molded parts that fall below predetermined standards. The defective product rate is calculated by dividing the number of defective products molded by the lower mold 13a by the total number of injection-molded products molded by the lower mold 13a so far.

For example, in step S16, the control device 50 takes an image of the injection-molded product with a camera (not shown) and compares it with the image of the injection-molded product that satisfies the criteria, thereby determining whether or not the injection-molded product satisfies the criteria. Just do it.

Next, the control device 50 determines whether molding of a predetermined number of injection-molded products has been completed (S17). When the control device 50 determines that the molding has not yet been completed (S17: No), the control device 50 drives the table rotation motor 23 to move the lower mold 13a to the molding position (S18). Next, the controller 50 drives the open/close motor 24 to close and clamp the upper mold 12 and the lower mold 13a at the molding position, and simultaneously drives the core cylinder 25. By doing so, the core 14 is inserted into the lower mold 13a (S19). Then, the control device 50 executes the processes after step S12 for the lower die 13a.

In step S13, the lower mold 13b moves to the molding position. Therefore, the control device 50 executes the processes of S19 and S12 for the lower mold 13b in parallel with the processes of steps S14 to S16 for the lower mold 13a. Further, in step S18, the lower mold 13b moves to the molded article unloading position. Therefore, the control device 50 executes the processes of steps S14 to S16 for the lower mold 13b in parallel with the processes of steps S19 and S12 for the lower mold 13a. As a result, the injection molding machine 10 alternately uses the lower molds 13a and 13b to mold an injection-molded product.

On the other hand, when the control device 50 determines that molding is completed (S17: Yes), the core cylinder 25 is driven to insert the core 14 into the lower mold 13a (S20). Next, the control device 50 determines whether or not the lower mold 13a satisfies the mold unloading condition (S21). As an example, the control device 50 determines that the lower mold 13a satisfies the mold unloading condition when the defective product rate of the lower mold 13a aggregated in step S16 is equal to or greater than the threshold ratio.

When the controller 50 determines that the lower mold 13a satisfies the mold unloading condition (S21: Yes), the controller 50 removes the autocoupler device 27 from the adapter 16 (S22). As a result, the connection between the core sensor 26 in the lower mold 13a and the controller 50 is released. Next, the control device 50 drives the table rotation motor 23 to move the lower mold 13a to the mold replacement position as shown in FIG. 7(C) (S23). It is also assumed that the receiving area 44 of the rotary table 41 faces the conveyor 43 by this time.

Next, the control device 50 stops the application of the voltage to the mag clamp of the rotary table 22 to release the fixation of the lower die 13 a to the rotary table 22 . Then, the controller 50 drives the conveyor 43 to move the lower mold 13a away from the upper mold 12, inserting the core 14 and removing the auto coupler device 27 from the rotary table. Carry out from 22. That is, the control device 50 moves the lower mold 13 a at the mold exchange position of the rotary table 22 to the receiving area 44 of the rotary table 41 . At this time, the core cylinder 25 fixed to the lower mold 13a moves together with the lower mold 13a.

On the other hand, the control device 50 determines that the lower mold 13a does not satisfy the mold unloading condition when the defective product ratio is less than the threshold ratio. Then, when the control device 50 determines that the lower mold 13a does not satisfy the mold unloading condition (S21: No), it ends the mold unloading process without executing the processes of steps S22 to S24. .

FIG. 6 is a flow chart of the mold loading process. FIG. 8 is a state transition diagram of the rotary tables 22 and 41 in the mold loading process. For example, the control device 50 executes the mold carrying-in process after executing the mold carrying-out process.

First, the control device 50 rotates the rotary table 22 by driving the table rotating motor 42 so that the preliminary mold 17 a faces the conveyor 43 . Then, the controller 50 drives the conveyor 43 to carry the preliminary mold 17a with the core 14 inserted into the rotary table 22 as shown in FIG. 8(A).

That is, the control device 50 moves the preliminary mold 17a on the rotary table 41 to the mold replacement position on the rotary table 22 . At this time, the core cylinder 25 fixed to the preliminary mold 17a moves together with the preliminary mold 17a. As a result, the area on the rotary table 41 where the preliminary mold 17 a was placed becomes a new receiving area 45 .

Next, the control device 50 drives the table rotating motor 23 to move the preliminary mold 17a to the molding position as shown in FIG. 8B (S32). Next, the control device 50 closes the upper mold 12 and the preliminary mold 17a at the molding position by driving the open/close motor 24 (S33). At this time, guide pins (not shown) of the upper mold 12 are inserted into recesses (not shown) of the preliminary mold 17a, thereby positioning the preliminary mold 17a at an appropriate position. Then, the controller 50 applies a voltage to the mag clamp of the rotary table 22 in this state to fix the positioned preliminary mold 17a on the rotary table 22 .

Next, the control device 50 connects the autocoupler device 27 to the adapter 16 of the preliminary mold 17a (S34). As a result, the core sensor 26 in the positioned preliminary mold 17a and the control device 50 are connected. As a result, preparations for molding an injection-molded product using the preliminary mold 17a (that is, executing steps S11 to S19 in FIG. 5) are completed.

According to the above embodiment, for example, the following operational effects are obtained.

According to the above embodiment, one of the plurality of lower molds 13a and 13b can be carried out while being separated from the upper mold 12. As shown in FIG. Thereby, even after the lower mold 13a is carried out, the molding of the molded product can be continued with the upper mold 12 and the remaining lower mold 13b. As a result, it is possible to efficiently check the state of a portion of the lower mold 13a while suppressing a decrease in the throughput of the injection molding machine 10. FIG.

Further, according to the above embodiment, only the lower mold 13a with a high defective product rate is carried out, and the state of the lower mold 13a (for example, damage, residual plasticized resin, etc.) is confirmed. can be done. However, a specific example of the mold carry-out condition is not limited to the defective product rate being equal to or higher than the threshold rate.

As another example, in step S16, the control device 50 may tally the number of molded injection-molded products (hereinafter referred to as "the number of moldings") for each of the lower molds 13a and 13b. Then, in step S21, the control device 50 may determine that the mold carry-out condition is satisfied when the number of moldings reaches the threshold value. As a result, the state of the lower mold 13 is checked and replaced at the timing when the predetermined number of molds are molded, so that the occurrence of defective products can be prevented.

Further, according to the above embodiment, since the core 14 is carried out together with the lower mold 13a, the state of the core 14 can also be checked. Further, in the above embodiment, after inserting the core 14 (S20), the connection between the core sensor 26 and the control device 50 is released (S22). This makes it possible to reliably detect that the core 14 has been inserted into the lower mold 13a. As a result, it is possible to prevent the lower die 13a in which the core 14 is not inserted from being carried out.

Further, according to the above embodiment, the preliminary mold 17a with the core 14 inserted therein is carried. As a result, it is possible to prevent the upper mold 12 or the core 14 from being damaged by the upper mold 12 clamping the preliminary mold 17a from which the core 14 has been removed during subsequent molding. .

Further, according to the above-described embodiment, by closing the upper mold 12 and the carried-in preliminary mold 17a, the preliminary mold 17a can be positioned at an appropriate position. By connecting the auto coupler device 27 to the adapter 16 of the positioned spare mold 17a, connection failure between the core sensor 26 of the spare mold 17a and the controller 50 can be prevented.

Furthermore, according to the above embodiment, while the injection-molded products are being sequentially molded, mold clamping and core insertion are executed in parallel (S19), so the throughput of the molding cycle (S11 to S19) is improves. On the other hand, after molding a predetermined number of molded products (S17: Yes), the core 14 is inserted into the lower mold 13a regardless of whether the mold carry-out condition is satisfied (S20). As a result, it is possible to prevent the start of a new molding cycle and the removal of the mold from the mold clamping device 20 while the core 14 is not inserted into the lower mold 13a.

Moreover, a specific example of the molding machine is not limited to an injection molding machine. As another example of a molding machine, the present invention can also be applied to a die casting machine that injects a molten metal (molding material) into a mold to mold a molded product.

The above-described embodiments are illustrative examples of the present invention and are not intended to limit the scope of the present invention only to those embodiments. Those skilled in the art can implement the invention in various other forms without departing from the spirit of the invention.

DESCRIPTION OF SYMBOLS 10... Injection molding machine, 11... Mold, 12... Upper mold, 13, 13a, 13b... Lower mold, 14... Core, 15... Cavity, 16... Adapter, 17, 17a, 17b... Spare mold , 20... mold clamping device, 21... movable die plate, 22, 41... rotary table, 23, 42... table rotating motor, 24... open/close motor (open/close mechanism), 25... core cylinder (core insertion/extraction mechanism), 26 Core sensor 27 Auto coupler device 30 Injection device 31 Heating cylinder 32 Nozzle 33 Nozzle touch motor 40 Mold loading/unloading device 43 Conveyor 44, 45 Receiving area, 50... Control device, 51... CPU, 52... ROM, 53... RAM, 54... Display input device

Claims (4)

A mold clamping device that opens, closes and clamps a mold including an upper mold and a plurality of lower molds, an injection device that injects a molding material into a cavity of the clamped mold, and the mold clamping device. A molding machine equipped with a mold loading/unloading device for loading/unloading the mold to and from the mold, and a control device for controlling the mold clamping device, the injection device, and the mold loading/unloading device,
The mold clamping device
By supporting and rotating the plurality of lower molds at positions spaced apart in the circumferential direction, a molding position facing the upper mold, a molded product unloading position for taking out the molded product, and the mold from the mold clamping device. a rotary table for moving the lower mold between mold exchange positions for unloading the mold;
an opening/closing mechanism for opening/closing and clamping the upper mold and the lower mold at the molding position ;
a core insertion/removal mechanism for inserting/removing a core forming the cavity together with the clamped upper mold and the lower mold into/from the lower mold;
a core sensor that detects the position of the core in the lower mold;
The control device is
determining the presence or absence of the lower mold that satisfies a mold carry-out condition among the plurality of lower molds;
Rotate the rotary table to move the lower mold determined to satisfy the mold carry-out condition to the mold replacement position while being separated from the upper mold;
causing the mold loading/unloading device to unload the lower mold at the mold replacement position ;
causing the core insertion/extraction mechanism to remove the core from the lower mold before removing the molded product at the molded product removal position;
causing the core insertion/removal mechanism to insert the core into the lower mold before the mold loading/unloading device carries out the mold at the mold exchange position;
A molding machine according to claim 1, characterized in that after the core sensor detects that the core has been inserted, the lower mold at the mold exchange position is carried out by the mold loading/unloading device. The control device is
For each of the plurality of lower molds, totaling the ratio of defective products below a predetermined standard among the molded products molded by the lower mold,
2. The molding machine according to claim 1, wherein said lower mold having a total ratio of defective products equal to or higher than a threshold ratio is judged to satisfy said mold carry-out condition. The control device is
causing the mold carrying-in/out device to carry the lower mold with the core inserted into the mold exchange position of the rotary table;
rotating the rotary table to move the lower mold carried into the mold exchange position to the molding position;
3. The lower mold is fixed to the rotary table while the upper mold and the lower mold at the molding position are closed by the open/close mechanism. molding machine. The control device is
In the process of sequentially molding a predetermined number of molded products,
causing the core insertion/extraction mechanism to remove the core from the lower mold before removing the molded product at the molded product removal position;
At the molding position, in parallel with causing the opening and closing mechanism to clamp the upper mold and the lower mold, causing the core insertion/removal mechanism to insert the core into the lower mold,
After molding a predetermined number of moldings,
causing the core insertion/removal mechanism to insert the core into the lower mold;
The molding machine according to any one of claims 1 to 3, wherein it is determined whether or not the lower mold into which the core has been inserted satisfies the mold unloading condition.

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