TW201536521A - Injection molding machine - Google Patents

Abstract

The present invention provides an injection molding machine capable of determining whether or not the molding is good at the time of injection molding. The injection molding machine of this invention includes: a mold clamping device to perform mold closing, mold clamping and mold opening of a mold device; an injection apparatus for filing molding material into the aforementioned mold device; and a light intensity detection unit for detecting the intensity of light from said molding material. Preferably, a deterioration detection unit is provided to detect the detected light intensity to determine the deterioration of the molding material.

Description

Injection molding machine

The present invention relates to an injection molding machine.

The injection molding machine includes a mold clamping device that performs mold closing, mold clamping, and mold opening of the mold device, an injection device that fills the cavity space in the mold device, and an ejection device that ejects the molded product in the mold device. (For example, refer to Patent Document 1).

(previous technical literature) (Patent Literature)

Patent Document 1: Japanese Patent Publication No. 2011-183705

Conventionally, it has been determined whether or not the molding is good by visual inspection after injection molding.

The present invention has been made in view of the above problems, and a main object thereof is to provide an injection molding machine capable of determining whether or not molding is good at the time of injection molding.

In order to solve the above problems, an injection molding machine is provided according to an aspect of the present invention, comprising: a mold clamping device for performing mold closing, mold clamping, and mold opening of a mold device; and an injection device for filling a molding material into the mold device; The light intensity detecting unit detects the intensity of light from the molding material.

According to an aspect of the invention, there is provided an injection molding machine capable of determining whether or not molding is good at the time of injection molding.

10‧‧‧Molding device

11‧‧‧Frame

12‧‧‧Fixed platen

13‧‧‧ movable platen

26‧‧‧Molded motor

30‧‧‧Molding device

32‧‧‧Fixed mode

33‧‧‧ movable mold

34‧‧‧ cavity space

50‧‧‧Injection device

51‧‧‧Cylinder block

52‧‧‧ screw

53‧‧‧Measuring motor

54‧‧‧Injection motor

56‧‧‧Nozzles

60‧‧‧Ejecting device

61‧‧‧Ejecting rod

62‧‧‧Out of the motor

71‧‧‧1st light irradiation department

72‧‧‧1st Light Intensity Detection Department

73‧‧‧2nd Light Irradiation Department

74‧‧‧2nd Light Intensity Detection Department

76‧‧‧Degradation Detection Department

Fig. 1 is a view showing a state at the time of mold clamping of an injection molding machine according to an embodiment of the present invention.

Fig. 2 is a view showing a state at the time of completion of mold opening of the injection molding machine according to the embodiment of the present invention.

In the following, the embodiments for carrying out the invention will be described with reference to the drawings, in which the same or corresponding reference numerals are given to the same or corresponding structures, and the description is omitted.

Fig. 1 is a view showing a state at the time of mold clamping of an injection molding machine according to an embodiment of the present invention. Figure 2 is a view showing an injection of an embodiment of the present invention. A diagram of the state at the end of the mold opening of the molding machine. As shown in FIGS. 1 and 2, the injection molding machine includes a frame Fr, a mold clamping device 10, an injection device 50, an ejector device 60, a first light irradiation portion 71, a first light intensity detecting portion 72, and a second light. The irradiation unit 73, the second light intensity detecting unit 74, and the deterioration detecting unit 76.

The mold clamping device 10 performs mold closing, mold clamping, and mold opening of the mold device 30. As shown in Fig. 1, the mold clamping device 10 has a fixed platen 12, a movable platen 13, a rear platen 15, a link 16, a toggle mechanism 20, and a mold clamping motor 26. In the description of the mold clamping device 10, the moving direction of the movable platen 13 at the time of mold closing (the right direction in the first drawing) is set to the front, and the moving direction of the movable platen 13 at the time of mold opening (the left direction in the first drawing) ) Set to the rear for explanation.

The fixed platen 12 is fixed to the frame Fr. A fixed die 32 is attached to a surface of the fixed platen 12 opposite to the movable platen 13.

The movable platen 13 is freely movable along a guide (for example, a guide rail) 17 laid on the frame Fr, and is movable freely for the fixed platen 12. A movable mold 33 is attached to a surface of the movable platen 13 opposite to the fixed platen 12. The mold device 30 is constituted by the fixed mold 32 and the movable mold 33.

By moving the movable platen 13 forward and backward with respect to the fixed platen 12, the mold device 30 is closed, closed, and opened.

The rear platen 15 is coupled to the fixed platen 12 via a plurality of (for example, four) links 16, and is movably placed on the frame Fr in the mold opening and closing direction. In addition, the rear platen 15 can also move freely along the guides laid on the frame Fr. The guide of the rear platen 15 can also be shared with the guide 17 of the movable platen 13.

Further, in the present embodiment, the fixed platen 12 is fixed to the frame Fr, and the rear platen 15 is movable in the mold opening and closing direction with respect to the frame Fr. However, the rear platen 15 may be fixed to the frame Fr, and the fixed platen 12 may be along the frame Fr. The mold opening and closing direction moves freely.

The link 16 is parallel to the mold opening and closing direction and extends by the mold clamping force. A mold clamping force detector is attached to at least one of the links 16. The mold clamping force detector can be in the form of strain, and the clamping force is detected by detecting the strain of the connecting rod.

Further, the mold clamping force detector is not limited to the strain form, and may be a piezoelectric type, a capacity type, a hydraulic type, an electromagnetic type or the like, and the mounting position thereof is not limited to the link 16.

The toggle mechanism 20 is disposed between the movable platen 13 and the rear platen 15, and is attached to the movable platen 13 and the rear platen 15, respectively. The movable clamp 13 is advanced and retracted toward the rear pressure plate 15 by the expansion and contraction of the toggle mechanism 20 in the mold opening and closing direction.

The mold clamping motor 26 moves the movable platen 13 via the toggle mechanism 20. A ball screw mechanism is provided between the mold clamping motor 26 and the toggle mechanism 20, and the motion converting portion 27 converts the rotational motion of the mold clamping motor 26 into a linear motion and transmits it to the toggle mechanism 20.

The mold clamping motor 26 performs mold closing by advancing the movable platen 13. After the mold closing is completed, the urging force of the mold clamping motor 26 is multiplied by the clamping force of the toggle ratio, and the mold clamping force is used to close the mold. At the time of mold clamping, a cavity space 34 is formed between the movable die 33 and the fixed die 32, and the cavity space 34 is filled with a liquid molding material. The molding material in the cavity space 34 is solidified to be a molded article. Thereafter, the mold clamping motor 26 advances by moving the movable platen 13 backward. Open the mold.

The injection device 50 fills the mold device 30 with a molding material. The injection device 50 has a cylinder 51, a screw 52, a metering motor 53, and an injection motor 54. In the description of the injection device 50, unlike the description of the mold clamping device 10, the moving direction of the screw 52 at the time of filling (the left direction in the first drawing) is set to the front, and the moving direction of the screw 52 at the time of measurement (Fig. 1) The middle right direction is set to the rear for explanation.

The cylinder 51 heats the molding material supplied from the supply port 51a. The supply port 51a is formed at the rear of the cylinder 51. A heating source such as a heater is provided on the outer circumference of the cylinder 51. A nozzle 56 is provided at the front end of the cylinder 51.

The screw 52 is rotatably disposed in the cylinder 51 and is freely retractable.

The metering motor 53 conveys the molding material forward along the spiral groove of the screw 52 by rotating the screw 52. The forming material is gradually heated by the heat from the cylinder 51 while being sent to the front. As the liquid molding material is sent to the front of the screw 52 and accumulated in the front portion of the cylinder 51, the screw 52 is retracted.

The injection motor 54 advances the screw 52 to fill the liquid molding material accumulated in front of the screw 52 in the cavity space 34 of the mold device 30. Thereafter, the injection motor 54 pushes the screw 52 forward and applies pressure to the molding material in the cavity space 34. It is possible to replenish insufficient molding materials due to short or sink.

Further, although the injection device of the present embodiment is of a coaxial screw type, it may be a screw pre-molding type. The screw pre-molding injection device supplies the molding material melted in the plasticizing cylinder to the shooting cylinder, and ejects from the shooting cylinder into the mold device Forming material. In the plasticizing cylinder, the screw is set to be freely rotatable or rotatable and free to move forward and backward. In the shooting cylinder, the plunger is configured to move forward and backward freely.

The ejector unit 60 ejects the molded article from the mold device 30 after the mold opening. The ejector unit 60 has an ejector rod 61 and an ejector motor 62. The description of the ejector unit 60 is the same as the description of the mold clamping device 10, and the moving direction of the movable platen 13 at the time of mold closing (the right direction in the first drawing) is set to the front, and the moving direction of the movable platen 13 at the time of mold opening ( The description will be made by setting the left direction in the first drawing to the rear.

The ejector rod 61 is inserted through the through hole of the movable platen 13, and the movable platen 13 can be moved forward and backward. As the ejector rod 61 advances and retracts, the protruding member 35 disposed in the movable mold 33 advances and retreats, and the protruding member 35 ejects the molded product from the movable mold 33.

The ejector motor 62 advances and retracts the ejector rod 61. A motion converting portion 63 that converts the rotational motion of the ejector motor 62 into a linear motion of the ejector rod 61 is provided between the ejector motor 62 and the ejector rod 61. The motion converting unit 63 is constituted by, for example, a ball screw mechanism or the like.

The first light irradiation unit 71 is attached to the mold device 30, the mold clamping device 10, and the like (the mold device 30 is attached to FIGS. 1 and 2), and irradiates the molded article after the mold is opened. The light from the first light irradiation unit 71 may be any one of ultraviolet light, visible light, and infrared light. The light from the first light irradiation unit 71 is transmitted through the molded article and enters the light guiding member 75.

The light guiding member 75 is made of an optical fiber or the like, and guides light from the molded article to the first light intensity detecting unit 72. The light guiding member 75 can be inserted through the through hole of the protruding member 35 or the through hole of the ejector rod 61, for example.

The first light intensity detecting unit 72 detects the intensity of light from the molded article. The first light intensity detecting unit 72 is configured by an optical fiber, a photoelectric conversion element, or the like, and outputs a signal indicating the intensity of light in a predetermined wavelength range to the deterioration detecting unit 76.

Further, the first light intensity detecting unit 72 of the present embodiment receives light from the molded article after the mold is opened, but may receive light from the molding material in the mold device 30 in the mold clamping. At this time, the first light irradiation unit 71 can be mounted in the mold device 30.

The deterioration detecting unit 76 includes a storage unit such as a memory and a CPU (Central Processing Unit, Central Processing Unit), and performs various processes by causing the CPU to execute a program stored in the storage unit. The deterioration detecting unit 76 can also function as a controller that controls various operations of the injection molding machine. In addition, the controller may be provided separately from the deterioration detecting portion 76.

The deterioration detecting unit 76 detects deterioration of the molding material based on the detected value of the first light intensity detecting unit 72. The more severe the thermal deterioration of the shaped material, the higher the light absorptivity of the shaped material and the lower the light transmittance. Therefore, the deterioration detecting unit 76 can detect the degree of deterioration of the molding material in accordance with the detected value of the first light intensity detecting unit 72.

The deterioration detecting unit 76 can determine whether or not the molding is good by the degree of deterioration of the molding material. For example, the deterioration detecting unit 76 stores a reference value (for example, a value at the time of good quality) in advance in the storage unit, and determines whether or not the molding is good by comparing the reference value with the detected value. The deterioration detecting unit 76 can determine whether or not the molding at the time of each emission is good. It is also possible to use the previous emission value or the average value of the reciprocal emission instead of the reference value.

In addition, the first light intensity detecting unit 72 of the present embodiment receives the transmitted light of the molded article, but may receive any one of reflected light, scattered light, and emitted light from the molded article. The emitted light is generated, for example, by irradiating the surface of the molded article with ultraviolet rays. The intensity of light such as reflected light, scattered light, and emitted light changes depending on the degree of deterioration of the molded article.

Further, although the first light irradiation unit 71 of the present embodiment is provided in the injection molding machine, it may be installed in a factory in which the injection molding machine is installed. Further, the first light irradiation unit 71 or the first light intensity detecting unit 72 may be attached to the unloader. The take-up machine takes out the molded article from the mold device 30 after the mold opening.

The second light irradiation unit 73 is attached to the injection device 50 and irradiates light to the molding material in the injection device 50. The light from the second light irradiation unit 73 may be any one of ultraviolet light, visible light, and infrared light. The light from the second light irradiation unit 73 is transmitted through the molten material in the nozzle 56 and is incident on the second light intensity detecting unit 74.

The second light intensity detecting unit 74 is attached to the injection device 50 and detects the intensity of light from the molding material in the injection device 50. The second light intensity detecting unit 74 is configured by an optical fiber, a photoelectric conversion element, or the like, and outputs a signal indicating the intensity of light in a predetermined wavelength range to the deterioration detecting unit 76.

Further, the second light irradiation unit 73 or the second light intensity detecting unit 74 is attached to the nozzle 56 of the injection device 50, but may be attached to the cylinder 51 of the injection device 50.

The deterioration detecting unit 76 detects deterioration of the molding material in the injection device 50 based on the detected value of the second light intensity detecting unit 74. The more severe the thermal deterioration of the shaped material, the higher the light absorptivity of the shaped material and the lower the light transmittance. because Thus, the degree of deterioration of the molding material can be detected based on the detected value of the second light intensity detecting unit 74.

The deterioration detecting unit 76 can determine whether or not the molding is good by the degree of deterioration of the molding material in the injection device 50. For example, the deterioration detecting unit 76 stores the reference value (for example, the value at the time of good product) in the storage unit in advance, and determines whether or not the molding is good by comparing the reference value with the detected value. The deterioration detecting unit 76 can determine whether or not the molding at the time of each emission is good. It is also possible to use the previous emission value or the average value of the reciprocal emission instead of the reference value.

In addition, the second light intensity detecting unit 74 of the present embodiment receives the transmitted light of the molding material in the injection device 50, but may receive any of the reflected light, the scattered light, and the emitted light from the molding material in the injection device 50. One. The emitted light is generated, for example, by irradiating the surface of the molding material with ultraviolet rays. The intensity of light such as reflected light, scattered light, and emitted light changes depending on the degree of deterioration of the formed material.

The image display device 78 can display the detection result of the deterioration detecting unit 76 (the degree of deterioration and whether the molding is good or the like).

When the deterioration detecting unit 76 detects a molding failure, the output device such as the image display device 78 or the speaker 80 can output an alarm. Further, when the deterioration detecting unit 76 detects a molding failure, the molding operation of the injection molding machine can be interrupted.

In the above, the embodiment of the injection molding machine and the like has been described. However, the present invention is not limited to the above-described embodiments and the like, and various modifications and improvements can be made within the scope of the invention as described in the claims.

For example, the injection molding machine can have a beam splitter. Beam splitter makes lighting A portion of the light of the shot is transmitted and irradiated to the forming material, and a portion of the light from the forming material is reflected and aligned with the light intensity detecting portion.

10‧‧‧Molding device

12‧‧‧Fixed platen

13‧‧‧ movable platen

15‧‧‧ rear platen

16‧‧‧ Connecting rod

17‧‧‧ Guides (rails)

20‧‧‧Toggle mechanism

26‧‧‧Molded motor

27‧‧‧Sports Conversion Department

30‧‧‧Molding device

32‧‧‧Fixed mode

33‧‧‧ movable mold

34‧‧‧ cavity space

35‧‧‧ protruding members

50‧‧‧Injection device

51‧‧‧Cylinder block

51a‧‧‧ supply port

52‧‧‧ screw

53‧‧‧Measuring motor

54‧‧‧Injection motor

56‧‧‧Nozzles

60‧‧‧Ejecting device

61‧‧‧Ejecting rod

62‧‧‧Out of the motor

63‧‧‧Sports Conversion Department

71‧‧‧1st light irradiation department

72‧‧‧1st Light Intensity Detection Department

73‧‧‧2nd Light Irradiation Department

74‧‧‧2nd Light Intensity Detection Department

75‧‧‧Light guiding members

76‧‧‧Degradation detector

78‧‧‧Image display device

80‧‧‧Speakers

Fr‧‧ frame

Claims (6)

An injection molding machine comprising: a mold clamping device for performing mold closing, mold clamping, and mold opening of a mold device; an injection device for filling a molding material into the mold device; and a light intensity detecting portion for detecting the molding The intensity of the light of the material. The injection molding machine according to claim 1, wherein the deterioration detecting unit that detects deterioration of the molding material by the detection value of the light intensity detecting unit is provided. The injection molding machine according to claim 2, wherein the deterioration detecting unit determines whether the molding is good or not at each emission. The injection molding machine according to any one of claims 1 to 3, wherein the light intensity detecting unit detects the intensity of light from the molding material filled in the mold device. The injection molding machine according to any one of claims 1 to 3, wherein the light intensity detecting unit detects the intensity of light from the molding material in the injection device. The injection molding machine according to any one of claims 1 to 3, further comprising a light irradiation unit that irradiates light onto the molding material.