JPH065928U - Insert molding system - Google Patents

Abstract

(57) [Summary] [Purpose] To reliably detect molding defects such as short shots of thin parts that occur during the molding of small resin products, and remove defective products. [Composition] A cutting press provided with a sensor 3 facing the product 1 after resin molding, and when the light receiving element 3b of the sensor 3 does not receive the reflected light at the thin portion of the light emitted from the light projecting element 3a. Cut the connecting part 7 of the product 1 by 4, 5,
Remove from transport path 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an insert molding system that guides an insert member into a metal mold for resin molding after processing and integrally molds the insert member.

[0002]

[Prior art]

 In the conventional insert molding, as shown in FIG. 5, an insert member is continuously formed from a long metal plate in a processing section 51 by press working, and the insert member is guided to the molding section 52. The molding unit 52 is equipped with an injection molding machine, and after the insert member is inserted into the resin mold, the resin mold is filled with the resin melted from the injection molding machine. As a result, the resin product 61 is integrally formed with the insert member 62 as shown in FIG. The resin products 61 formed in the molding unit 52 are guided to the finished product unit 53, where they are separated one by one or are wound into a hoop shape by removing unnecessary portions.

As described above, according to the conventional insert molding, a transport path 54 continuous to the processing section 51, the molding section 52 and the finished product section 53 is formed, and the product is transported in the transport path 54. As a result, a system has been constructed that automates insert molding. In order to mold a complete resin product in such an insert molding system, generation of defective products is suppressed by controlling the structure of the resin mold in the molding part 52 and the pressure inside the mold.

[0004]

[Problems to be solved by the device]

 However, when the resin product is downsized, the wall thickness of the product may be about 0.15 to 0.3 mm like the wall portion 61a of the product 61 shown in FIG. 6, and molding defects may occur in such a thin portion. When a so-called short shot occurs, the change in mold pressure is extremely small, and it becomes impossible to accurately detect defective products by the detection function of the injection molding machine. A problem occurs that defective products are mixed.

An object of the present invention is to provide an insert molding system capable of surely detecting the occurrence of a short shot even in a small resin product and accurately determining the quality of the product.

[0006]

[Means for Solving the Problems]

 The insert molding system of the present invention includes a processing section for processing an insert member, a molding section for filling a resin in an installed mold, and a conveyance path from the processing section to the finished product section via the molding section. In an insert molding system equipped with a sensor, a sensor consisting of a light emitting part and a light receiving part facing the product in the conveying path between the molding part and the finished product part, and the light receiving part of this sensor It is characterized in that a removing means for removing the product from the conveying path when the reflected light of the shining product is not received is provided.

[0007]

[Action]

 In this invention, light is emitted from the light emitting portion of the sensor to the product for which resin molding has been completed in the molding portion, and reflected light from the product of this light emitting portion is received by the light receiving portion. If a short shot occurs in the product, the surface of the product is not smooth and the light of the light emitting portion is scattered and is not received by the light receiving portion. In this way, when the light receiving portion does not receive the reflected light due to a molding defect such as a short shot in the product, the product is removed from the transport path by the removing means. Therefore, a product that has a molding failure will not be mixed into the finished product.

[0008]

【Example】

 FIG. 1 is a diagram showing a configuration of a main part of an insert molding system which is an embodiment of the present invention. The product 1 resin-molded in the molding section (not shown) is transported in the transport path 2 in the direction of arrow A. The sensor 3 faces the product 1 before reaching the finished product part. The sensor 3 comprises a light projecting element 3a and a light receiving element 3b. The detection distance of the sensor 3 and the diameter of the light receiving element 3b are 3 to 5 mm and 0.25 to 0.5 mm, respectively, when the thickness of the detection portion of the product 1 is 0.15 to 0.3 mm. The degree is appropriate. After facing the sensor 3, the product 1 is conveyed into the cutting presses 4 and 5. The cutting presses 4 and 5 are movable in the directions of arrows B and C, respectively, so that the connecting portion 7 of the product 1 can be cut.

FIG. 2 is a plan view showing a main part of the insert molding system. A piston 6 for removal faces the side surface of the product 1 at the position of the cutting presses 4, 5. The piston 6 is movable in the direction of arrow D so that the product 1 located on the upper surface of the press 5 can be removed from the conveying path 2.

FIG. 3 is a block diagram showing a main part of a control unit of the print molding system. The ROM 12, the RAM 13, the sensor 3, and the solenoid drivers 14 and 15 are connected to the CPU 11. A program that defines the processing operation of the CPU 11 is written in the ROM 12, and the CPU 11 generally controls the input / output devices according to this program. The RAM 13 is a storage area for data that is input to and output from the CPU 11. The CPU 11 outputs the drive data of the light projecting element 3a at a predetermined timing and reads the detection output of the light receiving element 3b. Further, drive data of the disconnecting solenoid 16 and the removing solenoid 17 is output from the CPU 11 to the solenoid drivers 14 and 15. The cutting solenoid 16 is an actuator of a hydraulic system for operating the cutting presses 4, 5, and the driving of the cutting solenoid 16 causes the cutting presses 4, 5 to move in the directions of arrows B and C, respectively. Cut 7. The removing solenoid 17 is an actuator for the piston 6 shown in FIG. 2, and the piston 6 moves in the direction of arrow D by driving the removing solenoid 17 to remove the product 1 from the conveying path 2.

FIG. 4 is a flowchart showing a processing procedure of the control unit of the print molding system. The CPU 11 reads the output of the light receiving element 3b of the sensor 3 at a predetermined timing (n1), and determines whether or not the light receiving element 3b receives the reflected light from the product 1 (n2). When the light receiving element 3b does not receive the reflected light from the product 1, the cutting solenoid 16 and the removing solenoid 17 are driven (n3, n4). The CPU 11 reads the output data of the light receiving element 3b at the timing when the sensor 3 faces the thin portion of the product 1, and when a molding defect such as a short shot occurs in the thin portion during resin molding. The upper surface of the thin portion is not smooth, the light emitted from the light projecting element 3a is scattered on the upper surface of the thin portion, and the light receiving element 3b cannot receive the reflected light. Therefore, the CPU 11 determines that a molding defect such as a short shot has occurred in the product 1 when the light receiving element 3b does not receive the reflected light, and disconnects the connecting portion 7 with the disconnecting solenoid 16 and removes it. The product solenoid 1 is driven and the piston 6 removes the product 1 from the conveying path 2.

Even when a product having a defective molding is removed from the transport path 2, the products before and after that are connected by the corresponding member 8, and the product following the removed defective product is continuously transported. be able to.

[0013]

[Effect of device]

 According to this invention, even if a molding defect such as a shot shot occurs in a thin portion of a product in which the insert member is integrally molded, this can be accurately detected and removed from the transport path. This has the advantage that defective products can be reliably prevented from entering the finished product.

[Brief description of drawings]

FIG. 1 is a side view showing a main part of an insert molding system according to an embodiment of the present invention.

FIG. 2 is a plan view showing a main part of the insert molding system.

FIG. 3 is a block diagram showing a main part of a control unit of the insert molding system.

FIG. 4 is a flowchart showing a part of a processing procedure of a control unit of the insert molding system.

FIG. 5 is a schematic diagram showing a configuration of a general insert molding system.

FIG. 6 is an external view of a product molded in the same general insert molding system.

[Explanation of symbols]

 2-Conveyance path 3-Sensor 3a-Light projecting element 3b-Light receiving element 4,5-Press for cutting 6-Piston 51-Processing section 52-Molding section 53-Lower part of finished product

Claims (1)

[Scope of utility model registration request] 1. A processing part for processing an insert member, a molding part for filling a resin into an installed mold, and a conveying path from the processing part to the finished product part via the molding part. In the insert molding system, a sensor composed of a light emitting part and a light receiving part facing the product and a light receiving part of the sensor are provided in the conveying path between the molding part and the finished product part. An insert molding system, comprising: a removing unit that removes the product from the transport path when the reflected light from the product is not received.