A PP fabric break detection device

Abstract

The utility model provides a PP cloth break detection device, including a box body, a detection device and a drying box are arranged in the box body, the detection device is arranged below the drying box, and transmission rollers are arranged below the detection device and above the drying box; the detection device includes a hollow strip-shaped transmitting box and a strip-shaped receiving box, the strip-shaped transmitting box and the strip-shaped receiving box are arranged on the same horizontal plane and have openings on opposite sides, a plurality of laser transmitters are arranged on the side away from the opening in the strip-shaped transmitting box, a focusing lens is arranged at the transmitting end of each laser transmitter, a condenser is arranged at the opening of the strip-shaped transmitting box, and a laser receiver is arranged at the opening of the strip-shaped receiving box. The utility model solves the problem in the prior art that after the broken glass fiber cloth runs into the drying box, the broken part will bend due to gravity and come into contact with the surface of the drying box, causing the resin on the surface of the glass fiber cloth to adhere to the surface of the drying box and cannot be cleaned.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB production equipment, in particular to a PP cloth break detection device. Background Art

[0002] Prepreg (PP for short) is one of the core materials of copper clad laminate and multi-layer PCB. Therefore, the efficiency and yield of the prepreg production process are particularly important in the production process of copper clad laminate. The production process of prepreg is roughly as follows: the glass fiber cloth first enters the impregnation tank, and the resin is impregnated on the surface of the glass fiber cloth. The excess resin is squeezed and measured by the metering roller, and then enters the drying oven for drying. After leaving the drying oven, it is cooled by automatic correction and cooling rollers to form a semi-cured resin plate, and finally rolled into the required length by the winder to form a prepreg.

[0003] However, during the production process, when the glass fiber cloth soaked with resin passes through the metering roller, if there are knots on the surface of the glass fiber cloth or the resin contains slag dropped from the furnace, the glass fiber knots or slag will be stuck in the extrusion point, causing partial breakage of the glass fiber cloth. If the broken cloth is not discovered in time, it will not only affect the yield of the PP finished product, but also after the broken glass fiber cloth automatically runs into the drying box, the broken part will bend due to gravity and come into contact with the surface of the drying box, causing the resin on the surface of the glass fiber cloth to adhere to the surface of the drying box and cannot be cleaned. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a PP cloth break detection device, which solves the problem in the prior art that after the broken glass fiber cloth runs into the drying box, the broken part will bend due to gravity and come into contact with the surface of the drying box, causing the resin on the surface of the glass fiber cloth to adhere to the surface of the drying box and cannot be cleaned.

[0005] According to an embodiment of the utility model, a PP cloth break detection device comprises a box body, wherein a detection device and a drying box are arranged in the box body, wherein the detection device is arranged below the drying box, and transmission rollers are arranged below the detection device and above the drying box;

[0006] The detection device includes a hollow strip-shaped transmitting box and a strip-shaped receiving box, which are arranged on the same horizontal plane and have openings on opposite sides. A plurality of laser transmitters are arranged on the side of the strip-shaped transmitting box away from the opening, and a focusing lens is arranged at the transmitting end of each laser transmitter. A condenser is arranged at the opening of the strip-shaped transmitting box, and a laser receiver is arranged at the opening of the strip-shaped receiving box.

[0007] Preferably, a plurality of shading sheets are arranged in parallel on a side of the laser emission box away from the opening, the laser emitter is arranged between two adjacent shading sheets, and the focusing lens is arranged at one end of the shading sheet close to the opening.

[0008] Preferably, the concentrator includes an adjustment component and a reflective plate, two reflective plates are hinged symmetrically at the opening of the strip-shaped transmitting box, two arc-shaped openings symmetrically at the front and rear side walls of the strip-shaped transmitting box are opened, push-pull rods are fixedly provided at the front and rear ends of the reflective plate, the push-pull rods are slidably passed through the corresponding arc-shaped openings, and the adjustment component is arranged on the front side of the strip-shaped transmitting plate and is rotatably connected to the push-pull rod.

[0009] Preferably, the adjustment assembly includes an adjustment push rod, a T-shaped slider and a connector. A T-shaped slide groove is provided on the front outer wall of the strip-shaped launch box. The T-shaped slider is slidably arranged in the T-shaped slide groove. One end of the adjustment push rod is placed in the T-shaped slide groove and fixedly connected to the T-shaped slider. The two ends of the connector are respectively rotatably mounted on the push-pull rod and the adjustment push rod.

[0010] Preferably, the connector comprises a connecting rod, both ends of which are fixedly provided with collars, and the two collars are rotatably sleeved on the push-pull rod and the adjusting push rod respectively.

[0011] Preferably, an L-shaped elastic clip is fixedly provided at one end of the adjusting push rod away from the T-shaped slider, a plurality of clip blocks are arranged in parallel on the front side of the strip-shaped transmitting frame, and the free end of the elastic clip can be embedded in the gap between the clip blocks.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] After the laser emitted by the laser transmitter passes through the focusing lens, the single-point laser with a small coverage area is transformed into a light spot with a larger coverage area. After being partially blocked by the opening of the strip emission frame, it becomes a small strip light spot. Then the small strip light spots formed by multiple laser transmitters are connected in sequence to form a large strip light spot with a larger coverage area, and it is completely covered with the fiberglass cloth in the horizontal direction. If there is a break on the fiberglass cloth, the strip light spot will pass through the gap caused by the break and shine on the laser receiver in the strip receiving box. When the laser receiver receives the light, it will immediately notify the master control system to shut down immediately and issue a warning. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an overall cross-sectional view of the detection device according to an embodiment of the present utility model.

[0015] Figure 2 This is a top sectional view of a strip-shaped emission box according to an embodiment of the present utility model.

[0016] Figure 3 It is a front view of the strip-shaped transmitting box according to an embodiment of the utility model.

[0017] Figure 4 It is a front side sectional view of the strip-shaped transmitting box according to an embodiment of the utility model.

[0018] In the above drawings: box body 1, drying box 2, strip receiving box 3, strip transmitting box 4, reflecting plate 5, focusing lens 6, laser transmitter 7, shading sheet 8, elastic clip 9, collar 10, push-pull rod 11, connecting rod 12, arc-shaped opening 13. DETAILED DESCRIPTION

[0019] The technical solution of the present utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] like Figures 1 to 4 As shown, the embodiment of the utility model proposes a PP cloth break detection device, a partition plate is vertically provided in the middle of the box body 1, a detection device and a drying box 2 are provided on one side of the partition plate, the detection device is arranged below the drying box 2, and transmission rollers are provided below the detection device and above the drying box 2 to drive the glass fiber cloth to move and pass through the detection device and the drying box 2;

[0021] The detection device includes a hollow strip-shaped transmitting box 4 and a strip-shaped receiving box 3, which are respectively arranged on the inner wall and the partition plate of the box body 1 and have openings on opposite sides. At the same time, the strip-shaped transmitting box 4 and the strip-shaped receiving box 3 are located on the same horizontal plane. A plurality of laser transmitters 7 are arranged on the side of the strip-shaped transmitting box 4 away from the opening. A focusing lens 6 is arranged at the transmitting end of each laser transmitter 7. A condenser is arranged at the opening of the strip-shaped transmitting box 4, and a laser receiver is arranged at the opening of the strip-shaped receiving box 3.

[0022] Since the lasers emitted by the laser emitters 7 are mostly single-point lasers, the single points formed on the object have a small spot area. Even if multiple laser emitters 7 are arranged horizontally in the horizontal direction, there will be gaps between two adjacent spots, resulting in the laser spot irradiated on the fiberglass cloth being unable to cover the entire fiberglass cloth in the horizontal direction. If the fracture position on the fiberglass cloth appears in the gap between the two spots, it cannot be accurately identified.

[0023] Therefore, in the present invention, by adjusting the distance between the focusing lens 6 and the emitting end of the laser emitter 7, the laser emitted by the laser emitter 7 is allowed to pass through the focusing lens 6, and the single-point laser with a small coverage area is changed into a light spot with a larger coverage area, and is partially blocked by the opening of the strip-shaped emitting frame to become a small strip-shaped light spot, and then the small strip-shaped light spots formed by multiple laser emitters 7 are connected in sequence to form a large strip-shaped light spot with a larger coverage range, and the large strip-shaped light spot is completely covered with the fiberglass cloth in the horizontal direction. If there is a break on the fiberglass cloth, the strip-shaped light spot will pass through the gap generated at the break and irradiate the laser receiver in the strip-shaped receiving box 3. When the laser receiver receives the light, it will immediately notify the master control system to shut down immediately and issue a warning.

[0024] A plurality of shading sheets 8 are arranged in parallel on one side of the strip-shaped transmitting box 4 away from the opening, a laser emitter 7 is arranged between two adjacent shading sheets 8, and a focusing lens 6 is arranged on one end of the shading sheet 8 close to the opening.

[0025] The use of the shading sheet 8 can prevent the lasers emitted by two adjacent laser emitters 7 from influencing each other, resulting in uneven illumination intensity of the light spot generated by the laser passing through the focusing lens 6 .

[0026] The concentrator includes an adjustment component and a reflecting plate 5. Two reflecting plates 5 are hinged symmetrically at the opening of the strip transmitting box 4. Two arc-shaped openings 13 symmetrically at the front and rear side walls of the strip transmitting box 4 are opened. Push-pull rods 11 are fixedly arranged at both ends of the reflecting plate 5. The push-pull rods 11 are slidably passed through the corresponding arc-shaped openings 13. The adjustment component is arranged on the front side of the strip transmitting plate and is rotatably connected to the push-pull rod 11.

[0027] By adjusting the angles of the two reflective plates 5 through the adjustment component, the laser light diverged by the focusing lens is refocused, and the light intensity of the light spot formed on the fiberglass cloth is adjusted. In this way, according to the light transmittance of different resin materials, it is ensured that the laser light can penetrate the resin at the fracture and irradiate the laser receiver.

[0028] The adjustment component includes an adjustment push rod, a T-shaped slider and a connector. A T-shaped slide groove is opened on the front outer wall of the strip-shaped transmitting box 4. The T-shaped slider is slidably set in the T-shaped slide groove. One end of the adjustment push rod is placed in the T-shaped slide groove and fixedly connected to the T-shaped slider. The two ends of the connector are respectively rotatably mounted on the push-pull rod 11 and the adjustment push rod; the connector includes a connecting rod 12, and both ends of the connecting rod 12 are fixedly provided with rings 10. The two rings 10 are respectively rotatably mounted on the push-pull rod 11 and the adjustment push rod.

[0029] Push the adjusting push rod to the right, and the collar 10 rotates on the push-pull rod 11 or the adjusting rod without being stuck. The push-pull rod 11 is pulled by the connecting rod 12 to move along the arc-shaped opening 13, so that the two reflective plates 5 rotate around the hinge axis so that their left ends are close to each other. At the same time, when the adjusting push rod is pushed, the T-shaped slider can also be driven to slide in the T-shaped slide groove to prevent the T-shaped slider from falling off.

[0030] An L-shaped elastic clip strip 9 is fixedly provided at one end of the adjusting push rod away from the T-shaped slider, and a plurality of clip blocks are arranged in parallel on the front side of the strip-shaped transmitting box 4, and the free end of the elastic clip strip 9 can be embedded in the gap between the clip blocks.

[0031] After the adjusting push rod is pushed to adjust the angle of the reflector 5 , the end of the elastic clip 9 can be embedded in the gap of the clip block to fix the position of the adjusting push rod.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A PP fabric break detection device, characterized in that: It comprises a box body, in which a detection device and a drying box are arranged, the detection device is arranged below the drying box, and transmission rollers are arranged below the detection device and above the drying box; The detection device includes a hollow strip-shaped transmitting box and a strip-shaped receiving box, which are arranged on the same horizontal plane and have openings on opposite sides. A plurality of laser transmitters are arranged on the side of the strip-shaped transmitting box away from the opening, and a focusing lens is arranged at the transmitting end of each laser transmitter. A condenser is arranged at the opening of the strip-shaped transmitting box, and a laser receiver is arranged at the opening of the strip-shaped receiving box.

2. A PP fabric break detection device as claimed in claim 1, characterized in that: A plurality of shading sheets are arranged in parallel on one side of the strip-shaped transmitting box away from the opening, the laser transmitter is arranged between two adjacent shading sheets, and the focusing lens is arranged on one end of the shading sheet close to the opening.

3. A PP fabric break detection device as claimed in claim 1, characterized in that: The concentrator includes an adjustment component and a reflective plate. Two reflective plates are hinged symmetrically at the opening of the strip-shaped transmitting box. Two arc-shaped openings symmetrically at the front and rear side walls of the strip-shaped transmitting box are provided. Push-pull rods are fixedly provided at both ends of the reflective plate. The push-pull rods are slidably passed through the corresponding arc-shaped openings. The adjustment component is arranged on the front side of the strip-shaped transmitting plate and is rotatably connected to the push-pull rod.

4. A PP fabric break detection device as claimed in claim 3, characterized in that: The adjustment component includes an adjustment push rod, a T-shaped slider and a connector. A T-shaped slide groove is opened on the front outer wall of the strip-shaped launch box. The T-shaped slider is slidably set in the T-shaped slide groove. One end of the adjustment push rod is placed in the T-shaped slide groove and fixedly connected to the T-shaped slider. The two ends of the connector are respectively rotatably mounted on the push-pull rod and the adjustment push rod.

5. A PP fabric break detection device as claimed in claim 4, characterized in that: The connector comprises a connecting rod, both ends of which are fixedly provided with collars, and the two collars are rotatably sleeved on the push-pull rod and the adjusting push rod respectively.

6. A PP fabric break detection device as claimed in claim 4, characterized in that: An L-shaped elastic clip is fixedly provided at one end of the adjusting push rod away from the T-shaped slider, and a plurality of clip blocks are arranged in parallel on the front side of the strip-shaped transmitting box, and the free end of the elastic clip can be embedded in the gap between the clip blocks.

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