WO2013002104A1

WO2013002104A1 - Injection-molding machine

Info

Publication number: WO2013002104A1
Application number: PCT/JP2012/065809
Authority: WO
Inventors: 樽家　宏治; 純二加藤
Original assignee: 東洋機械金属株式会社
Priority date: 2011-06-27
Filing date: 2012-06-21
Publication date: 2013-01-03
Also published as: CN103619559B; JP2013006392A; CN103619559A; JP5745953B2

Abstract

The present invention makes it possible to easily ascertain whether an abnormality is present at any location of a hoop member by which a resin part is insert-molded. An injection-molding machine comprises: an elongated hoop member (4) by which a resin part is insert-molded by packing a molten resin into a closed die in a state sandwiched between dies; a molding conditions detection sensor (31) for detecting that there is an abnormality when a predetermined condition during insert molding has departed from the predetermined condition; and a hoop member operating distance detection sensor (32) for detecting the position of the hoop member (4)by which a resin part(35) is insert-molded, when an abnormality has been detected by the molding conditions detection sensor (31). When a departure from the predetermined condition has happened, the molding conditions detection sensor (31) detects that an abnormality has occurred on the basis thereof, and the hoop member operating distance detection sensor (32) detects the position of the hoop member (4) by which the resin part (35) has been insert-molded when the abnormality occurred.

Description

Injection molding machine

The present invention relates to an injection molding machine that performs insert molding using a long hoop material. In particular, when a molding defect occurs in a portion where a resin component is insert-molded into a hoop material, an abnormal portion due to molding failure is easily detected. The present invention relates to an injection molding machine capable of discriminating.

Conventionally, an injection molding machine that opens and closes a mold in a horizontal direction or a vertical direction is known, for example, an upper mold and a lower mold provided below the upper mold and a lower mold. On the other hand, in a vertical injection molding machine that opens and closes the upper mold by moving the upper mold back and forth, a long hoop material is conveyed between the upper mold and the lower mold when insert molding is performed using the hoop material. In the past, molten resin was filled into a part of the hoop material that was transported between the molds, and the mold was clamped to integrate the resin parts into the metal hoop material. However, Patent Documents 1 to 3 disclose a technique in which a metal hoop material conveyed by roll-to-roll is conveyed between molds and insert molding is performed using the hoop material.

JP-A-8-39604 Japanese Patent Laid-Open No. 5-237872 Japanese Patent Laid-Open No. 3-55216

However, in an injection molding machine that employs a general hoop material as disclosed in Patent Documents 1 to 3 and insert-molds, when the hoop material is filled with molten resin and insert molding is performed, For each shot shot, the hoop material is transferred to the reel, which is the winding destination, by a predetermined distance unit, and the insert-formed hoop material is sequentially wound around the reel for each shot. At this time, even if molding defects occur due to insufficient injection of molten resin or insufficient filling pressure, the hoop material including the part having the defective part is wound around the reel, so that it is wound around the reel later. When trying to figure out which part of the long hoop material is defective, unwind the hoop material wound on the reel from the reel, Must determine by Riichiichi visual like, there is a situation that inevitably made complicated operations.

The present invention has been made in view of the above problems, and in a long hoop material wound around a reel after resin parts are insert-molded, where in the hoop material is abnormal due to molding failure? It is an object of the present invention to provide an injection molding machine that can easily grasp the above.

The invention of the injection molding machine
The mold is closed in a state where it is sandwiched between the fixed mold, the movable mold that is opened and closed with the fixed mold, the injection unit that injects and fills molten resin, and the fixed mold and the movable mold. A long hoop material in which resin parts are insert-molded by filling the molten resin into the mold, a first reel wound with the hoop material, and unwinding from the first reel A second reel that winds up the hoop material, and the first reel and the second reel so that the hoop material is conveyed in a direction orthogonal to a mold opening and closing direction of the mold. In the arranged injection molding machine,
A molding condition detection sensor for detecting as an abnormality that a predetermined condition at the time of insert molding deviates from the predetermined condition;
And a hoop material operating distance detection sensor for detecting the position of the hoop material in which the resin component is insert-molded when an abnormality is detected by the molding condition detection sensor.

The invention of the injection molding machine
When the molding condition detection sensor detects that there is an abnormality, there is provided a mark imparting means for imparting a mark to the hoop material in the vicinity of the resin part that is insert-molded.

The invention of the injection molding machine
The hoop material is made of metal, and the mark applying means presses the metal hoop material and stamps at least one of letters, numbers, or figures as a mark. .

According to the invention of the present injection molding machine, when the predetermined condition at the time of insert molding deviates from the predetermined condition, the molding condition detection sensor detects that an abnormality has occurred based on the predetermined condition. Then, the hoop material operating distance detection sensor detects the position of the hoop material in which the resin component is insert-molded when an abnormality occurs. In other words, when insert molding is performed when it deviates from the predetermined condition, a defect occurs in the insert molding. Therefore, the occurrence of such a defect is detected by the molding condition detection sensor based on the fact that the predetermined condition is not satisfied. When the abnormality is detected, the hoop material operating distance detection sensor detects the portion where the abnormality of the hoop material has occurred. Therefore, for example, even after the hoop material that has been subjected to the insert molding of the resin component is completely wound on the second reel, the long hoop material is not subjected to an artificial visual confirmation operation. It is possible to easily grasp at which position an abnormality has occurred.

Further, when an abnormality is detected by the molding condition detection sensor, the mark applying means stamps letters, numbers, or figures on the hoop material in the vicinity of the resin part that is insert-molded at that time, thereby providing a mark. . That is, the insert-molded hoop material is wound on the second reel, but even if the hoop material insert-molded on the second reel is wound, Since a mark is provided in the vicinity of, it is possible to easily determine which part is abnormal by visually observing the highly visible mark stamped on the hoop material.

It is a front view which shows the vertical injection molding machine of an example of this invention. It is explanatory drawing which shows schematic structure of a vertical injection molding machine, and shows the hoop material conveyed by roll toe roll between the upper and lower metal mold | dies of a vertical injection molding machine. The screen displayed on the display unit of the vertical injection molding machine is shown, and as shown in the column of the number of shots “31”, a predetermined condition for the mold opening time at the time of insert molding (max: 3.00 s to min : 2.40 s) is an explanatory diagram showing a state in which an asterisk mark is displayed at a position corresponding to the number of shots (31) and mold opening time when an actual measurement value (3.57 s) deviates from 2.40 s). It is explanatory drawing which shows the state by which the hoop material operating distance was represented on the display part of the vertical injection molding machine. It is explanatory drawing which shows the state which marked by the marking to the edge part of the hoop material by the mark provision means.

Hereinafter, modes for carrying out the present invention will be described below with reference to FIGS. Of course, it goes without saying that the present invention can be easily applied to configurations other than those described in the embodiments without departing from the spirit of the invention.

The vertical injection molding machine 1 according to an example of the present invention is roughly classified into an injection unit 2 for injecting molten resin, a mold clamping unit 3 for opening and closing a mold, and a hoop material conveying mechanism for conveying a metal hoop material 4. 5. It is composed of a display device 6 for displaying various operating conditions and various numerical values of the vertical injection molding machine 1, and the injection unit 2 heats and melts the resin (pellet) that is insert-molded into the hoop material 4. A heating cylinder 7 having two heaters (heater 1 and heater 2) on the outer periphery, and an injection nozzle 8 that is detachably screwed to the tip (lower part) are configured to be vertically movable. .

An injection screw 10 for supplying molten resin to the tip side of the injection nozzle 8 is provided in the heating cylinder 7 of the injection unit 2, and when the molten resin is measured, the measured molten resin is supplied to the injection nozzle 8. When the injection screw 10 is injected from the tip and injected into the hoop material, the injection screw 10 is driven via a drive transmission mechanism including a rotary pulley, a timing belt and the like using a servo motor as a drive source.

As shown in FIGS. 1 and 2, the mold clamping unit 3 is provided with a lower holding plate 12 having a lower mold 11 as a fixed mold attached to the upper part thereof, and spaced apart above the lower mold 11. An upper holding plate 14 to which an upper mold 13 that is a movable mold that is vertically moved when the mold is opened and closed is fixed, and an upper mold that is attached to the lower portion of the upper holding plate 14 by bending and extending. 13 is moved up and down along the longitudinal direction (vertical direction) of the tie bar 15 via the upper holding plate 14, and a toggle link mechanism (not shown) for opening and closing the lower mold 11 is operated, and the toggle link mechanism is operated. Servo motor as a driving source for opening and closing the mold, and mark applying means 16 for imprinting characters, numbers or figures on the hoop material 4 disposed between the upper mold 13 and the lower mold 11 to give a mark. Etc.

As shown in FIG. 2, the hoop material transport mechanism 5 includes a first reel 20 around which a long (about 15 to 100 m, 15 m in this embodiment) hoop material 4 is wound, The molten resin is drawn from the reel 20, passes between the upper mold 13 and the lower mold 11, and the molten resin is injected from the injection nozzle 8 of the injection unit 2 to the portion of the hoop material 4 disposed between these molds. A second reel 21 is provided that takes up the hoop material 4 that is filled and integrated with the resin component in which the molten resin is solidified. When the hoop material 4 wound around the first reel 20 is taken up by the second reel 21, the second reel 21 is driven to rotate by the second electric motor 22, and the second reel 21 is driven. When the hoop material 4 taken up in step 1 is taken up by the first reel 20, the first reel 20 is rotated by the first electric motor 23.

Further, as shown in FIGS. 3 and 4, the display unit 6a of the display device 6 of the vertical injection molding machine 1 has various numerical values such as various operating conditions of the vertical injection molding machine 1 and actually measured values corresponding thereto. As shown in FIG. 1, the display device 6 of the vertical injection molding machine 1 includes a control unit 30 that controls various controls of the entire vertical injection molding machine 1.

As shown in FIG. 1, the control means 30 of the vertical injection molding machine 1 includes a molding condition detection sensor that detects that a predetermined condition at the time of insert molding resin on the hoop material 4 is out of the predetermined condition as an abnormality. 31 and a hoop material working distance detection sensor 32 for detecting the position of the hoop material 4 in which the resin component is insert-molded when an abnormality is detected by the molding condition detection sensor 31, and the predetermined condition shown in FIG. As conditions, mold opening time (max: 3.00 s to min: 2.40 s), mold closing time (max: 3.50 s to min: 3.00 s), resin is heated to melt Heater temperature (heater 1 is max: 205 ° C. to min: 195 ° C., heater 2 is max: 195 ° C. to min: 185 ° C.), hoop material operating time when the hoop material is conveyed (max: 3.00 s to min 2.00 s), hoop material operating distance when conveying the hoop material (max: 0.09 m to min: 0.07 m), cycle timer (max: 11.0 s to min: 9.00 s), A storage means 33 is also provided for storing actually measured values corresponding to these.

Next, the first reel 20 around which the hoop material 4 having a length of 15 m is wound is applied, and the resin component 35 is insert-molded into the hoop material 4 (the resin component 35 is integrated with the hoop material 4). The operation will be described below.

First, the hoop material 4 is installed in the state shown in FIG. 2, and the length of the hoop material 4 wound around the first reel 20 by a predetermined input operation is stored in the storage means 33.

Next, when the vertical injection molding machine 1 is operated, as shown in FIG. 5, the resin part 35 is insert-molded with respect to the hoop material 4 for each shot, and the hoop material 4 in which the resin part 35 is insert-molded. Are sequentially wound around the second reel 21 provided on the transport direction side for each shot.

In such a situation, for example, as shown in the column of “mold opening time” in FIG. 3, an actual measurement value related to the mold opening time (3.57 s when the number of shots is “31”) is calculated as the mold opening time. When the molding condition detection sensor 31 detects that the predetermined condition, that is, a value outside the range of max: 3.00 s to min: 2.40 s, the mark applying means 16 is actuated by an instruction from the control means 30. Then, as shown in FIG. 5, a graphic (which may be a letter or a number) is marked on the edge of the hoop material 4 positioned between the upper mold 13 and the lower mold 11. 36 is used, and the length (15 m) of the hoop material 4 stored in advance in the storage means 33 and the hoop material operating distance in the number of shots 1 to 31 stored in the storage means 33 are used. The hoop material operating distance detection sensor 32 is connected to the hoop. 4 is detected, and as shown in FIG. 3, a value deviating from the predetermined condition (3.57 of mold opening time) and the corresponding number of shots (number of shots: 31) Is flagged (in this embodiment, an asterisk mark is displayed). As a method of detecting which position of the hoop material 4 is abnormal as described above, the control means 30 determines the hoop material operating distance of the number of shots (1 to 31 times) until the flag is raised. (Here, the total of the hoop material operating distances from 1 to 31 shots, which is 2.48 m), and there is an abnormality at a position 2.48 m from the tip of the hoop material 4 And the control means 30 uses the value of 15 m, which is the total length of the hoop material 4 stored in advance in the storage device 33, and the calculated value of 2.48 m, and calculates the difference between them. By calculating, the distance from the base end of the hoop material 4 to the position where the abnormality has occurred is also calculated. (12.52m = 15m-2.48m). Then, the abnormality occurrence position from the front end and the base end of the hoop material 4 is displayed on the screen of FIG. 4 or the like displayed on the display unit 6a by the control means 30.

As described above, according to the vertical injection molding machine 1 according to the present invention, the mold opening time, the mold closing time, the heater temperature for heating and melting the resin, and when the hoop material 4 is conveyed. When the hoop material operating time, the hoop material operating distance when the hoop material 4 is conveyed, or the predetermined conditions for insert molding such as a cycle timer deviate from the predetermined conditions, the molding condition detection sensor 31 is abnormal. Detect as occurring. Then, the hoop material operating distance detection sensor 32 detects the position of the hoop material 4 in which the resin component 35 is insert-molded when an abnormality occurs. That is, when insert molding is performed when it deviates from the predetermined condition, a defect occurs in the insert molding. Therefore, the occurrence of such a defect is detected by the molding condition detection sensor 31 based on the fact that the predetermined condition is not satisfied. When the abnormality is detected, the hoop material operating distance detection sensor 32 detects the location where the abnormality of the hoop material 4 has occurred. Therefore, for example, even after the hoop material 4 that has finished the insert molding of the resin component 35 is completely wound around the second reel 21, the long shape is obtained without performing an artificial visual confirmation operation. It is possible to easily grasp at which position of the hoop material 4 the abnormality has occurred.

Furthermore, when an abnormality is detected by the molding condition detection sensor 31, the mark applying means 16 stamps characters, numbers, or figures on the hoop material 4 in the vicinity of the resin part 35 that is insert-molded at that time. A mark 36 is given. That is, the insert-formed hoop material 4 is wound around the second reel 21, even if the hoop material 4 insert-molded onto the second reel 21 is wound. Since a mark is provided in the vicinity of the location where the abnormality has occurred, it is possible to easily determine where the abnormality is located by observing the highly visible mark 36 stamped on the hoop material 4. it can.

As mentioned above, although an example of this embodiment was explained in full detail, this invention is not limited to the said embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention. In the above example, it is a vertical injection molding machine that opens and closes the mold in the vertical direction, but it may be an injection molding machine that opens and closes the mold in the horizontal direction. Also, as shown in FIG. Although a mark 36 such as a figure is engraved, a notch may be formed by punching the edge of the hoop material 4. By doing so, even when the hoop material 4 that has been insert-molded on the reel 21 is wound, it is possible to visually check the notch on the side surface of the wound hoop material. Even if the hoop material 4 is not pulled out, it is possible to easily confirm where the abnormal portion is.

1 Vertical injection molding machine (Injection molding machine)
2 Injection unit 4 Hoop material 11 Lower mold (fixed mold)
13 Upper mold (movable mold)
16 Mark applying means 20 First reel 21 Second reel 31 Molding condition detection sensor 32 Hoop material operating distance detection sensor 35 Resin part 36 Mark

Claims

The mold is closed in a state where it is sandwiched between the fixed mold, the movable mold that is opened and closed with the fixed mold, the injection unit that injects and fills molten resin, and the fixed mold and the movable mold. A long hoop material in which resin parts are insert-molded by filling the molten resin into the mold, a first reel wound with the hoop material, and unwinding from the first reel A second reel that winds up the hoop material, and the first reel and the second reel so that the hoop material is conveyed in a direction orthogonal to a mold opening and closing direction of the mold. In the arranged injection molding machine,
A molding condition detection sensor for detecting as an abnormality that a predetermined condition at the time of insert molding deviates from the predetermined condition;
An injection molding machine comprising: a hoop material operating distance detection sensor that detects a position of a hoop material in which the resin component is insert-molded when an abnormality is detected by the molding condition detection sensor.
The mark providing means for applying a mark to the hoop material in the vicinity of the resin-molded part that has been insert-molded when the molding condition detection sensor detects an abnormality. Injection molding machine.
The hoop material is made of metal, and the mark applying means presses the metal hoop material and stamps at least one of letters, numbers, or figures as a mark. The injection molding machine according to claim 2.