Deburring device in extrusion blow molding machine

Abstract

This utility model discloses a flash removal device in an extrusion blow molding machine, comprising: a fixed plate fixed to the extrusion blow molding machine; a lifting cylinder vertically mounted on the fixed plate; a mounting frame connected to the piston rod of the lifting cylinder; a rotating shaft rotatably mounted between two side plates of the mounting frame; the rotating shaft being connected to a drive mechanism fixed to the mounting frame; a scraper vertically mounted on the rotating shaft, adapted to the concave area between the handle and the blow-molded product body; a flash removal push plate parallel to the rotating shaft below the rotating shaft; scraping holes adapted to the outer wall of the blow-molded product on the scraper push plate; the scraper push plate abutting against the two side plates; and a clearance inclined wall between the rear side wall and the bottom wall of the two side plates. When the scraper performs flash removal work, the scraper push plate rotates backward to clear the clearance, and the flash scraped off by the scraper falls directly downward without contacting the scraper push plate.

Description

Technical Field

[0001] This utility model relates to an extrusion blow molding machine, and more particularly to a flash removal device in an extrusion blow molding machine. Background Technology

[0002] In the process of producing blow-molded products using an extrusion blow molding machine, the blowing mechanism blows molten plastic into a tubular preform, which then enters the molding die to receive secondary blowing and shaping by the blow needle mechanism. After the molding die is opened, the blow-molded product is taken out and sent to the overflow removal device, where a scraper removes the flash from the outer wall of the blow-molded product. However, when the blow-molded product has a handle, there is also flash in the concave area between the handle and the blow-molded product. The scraper cannot remove the flash in this area. Generally, a digger is installed in the original overflow removal device. By rotating the digger, the flash in the concave area between the handle and the blow-molded product body is removed. However, since the scraper in the original overflow removal device is fixed, after the digger scrapes off the flash in the concave area, the flash on the digger will automatically fall down under the action of gravity and fall onto the scraper. This not only affects the scraper's flash removal effect in the next step, but also makes it easy for the fallen flash to stick to the blow-molded product, affecting the subsequent cooling and shaping effect. Utility Model Content

[0003] The purpose of this invention is to provide a flash removal device in an extrusion blow molding machine that prevents the flash from falling onto the flash pusher plate when removing the flash in the concave area between the handle and the blow-molded product.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a deflashing device in an extrusion blow molding machine, comprising: a fixed plate fixed on the extrusion blow molding machine; a lifting cylinder vertically arranged on the fixed plate; a mounting frame connected to the piston rod of the lifting cylinder; a rotating shaft rotatably arranged between the left and right side plates of the mounting frame; the rotating shaft being connected to a drive mechanism fixed on the mounting frame; a digging handle vertically arranged upward on the rotating shaft to fit the concave area between the handle and the blow-molded product body; a deflashing push plate parallel to the rotating shaft arranged below the rotating shaft; scraping holes adapted to the outer wall of the blow-molded product provided on the deflashing push plate; the deflashing push plate abutting against the two side plates; and an abutment inclined wall provided between the rear side wall and the bottom wall of the two side plates.

[0005] Furthermore, in the aforementioned deflash removal device of the extrusion blow molding machine, the driving mechanism includes: a gear, a rack, a push cylinder, and a protective shell. The protective shell and the push cylinder are fixed on the same side plate. The protective shell is provided with a connecting guide hole and a round hole. The rack is slidably engaged in the guide hole and connected to the piston rod of the push cylinder. The gear is mounted on a rotating shaft and connected to the rotating shaft key. The gear is located in the round hole and meshes with the rack.

[0006] Furthermore, in the aforementioned deflash removal device of the extrusion blow molding machine, a side milling plane is provided on the rear side wall of the rotating shaft, and a number of threaded holes are provided at equal intervals on the side milling plane. The left and right width of the excavator is not greater than the left and right width of the side milling plane. The excavator is provided with a curved part that matches the concave area between the handle and the blow-molded product body, and a flat part that abuts against the milling plane. A number of connecting elongated holes are provided on the flat part, and the number of connecting elongated holes is not greater than the number of threaded holes. The connecting elongated holes and the threaded holes are aligned and connected by connecting bolts.

[0007] Furthermore, in the aforementioned deflash removal device of the extrusion blow molding machine, a number of lower milling planes are spaced apart on the lower side wall of the rotating shaft, and a height-equalizing column is bolted to each lower milling plane, with the deflash removal push plate connected to the height-equalizing column.

[0008] Furthermore, in the aforementioned deflash removal device of the extrusion blow molding machine, four guide sleeves are provided around the fixed plate, and guide rods are slidably locked in the guide sleeves. A moving plate is connected between the tops of the four guide rods, and a clearance hole for a clearance lifting cylinder is opened on the moving plate. A transition plate is provided on the top of the mounting frame, and a connecting plate is provided on the transition plate. The four guide rods are connected to the connecting plate, and the piston rod of the lifting cylinder is connected to the connecting plate.

[0009] Furthermore, in the aforementioned deflash removal device of the extrusion blow molding machine, a support rod is provided between the left and right side plates of the mounting frame.

[0010] Furthermore, in the aforementioned flash removal device of the extrusion blow molding machine, an air passage is provided in the flash pusher plate, the air inlet of the air passage is connected to a compressed air source, a plug is provided in the air outlet of the air passage, and several air jet holes connected to the air passage are provided on the bottom wall of the flash pusher plate, with the air jet holes arranged along the scraping holes.

[0011] The advantages of this invention are as follows: the scraper and the deflashing pusher are fixed on the same rotating shaft. When the scraper rotates forward to deflash the concave area between the handle and the blow-molded product body, the deflashing pusher will rotate backward to avoid it. The deflash scraped off by the scraper will fall directly downward without contacting the deflashing pusher. This prevents the deflash on the scraper from falling onto the deflashing pusher, thus preventing the fallen deflash from sticking to the blow-molded product and affecting the subsequent cooling and shaping effect. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the deflash removal device in the extrusion blow molding machine described in this utility model.

[0013] Figure 2 yes Figure 1 A structural diagram from another viewpoint.

[0014] Figure 3 yes Figure 1 A cross-sectional view of the push plate for removing the flash. Detailed Implementation

[0015] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0016] like Figures 1-3 As shown, the deflash removal device in the extrusion blow molding machine of this utility model includes: a fixed plate 1 fixed on the extrusion blow molding machine; a lifting cylinder 11 vertically arranged on the fixed plate 1; four guide sleeves 12 arranged around the fixed plate 1; guide rods 13 slidably engaged in the guide sleeves 12; a moving plate 14 connected between the tops of the four guide rods 13; a clearance hole for the lifting cylinder 11 opened on the moving plate 14; a connecting plate 15 connected to the piston rod of the lifting cylinder 11; the four guide rods 13 connected to the connecting plate 15; a transition plate 16 arranged on the connecting plate 15; a mounting bracket 2 arranged on the transition plate 16; and two side plates of the mounting bracket 2. A support rod 22 is provided between the two side plates 21, and a rotating shaft 23 is rotatably provided. The support rod 22 improves the connection strength between the two side plates 21. The rotating shaft 23 is connected to the drive mechanism 3 fixed on the mounting frame 2. The drive mechanism 3 includes: a gear 31, a rack 32, a push cylinder 33, and a protective shell 34. The protective shell 34 and the push cylinder 33 are fixed on the same side plate 21. A guide hole and a round hole are provided in the protective shell 34. The rack 32 is slidably engaged in the guide hole and connected to the piston rod of the push cylinder 33. The gear 31 is fitted on the rotating shaft 23 and keyed to the rotating shaft 23. The gear 31 is located in the round hole and meshes with the rack 32.

[0017] A digger 4 is vertically mounted on the rotating shaft 23. The digger 4 has a curved portion 41 that matches the recessed area between the handle and the blow-molded product body, and a flat plate portion 42 for connection. The flat plate portion 42 has several elongated connecting holes. A side-milling plane 231 is provided on the rear side wall of the rotating shaft 23. Several threaded holes are evenly spaced on the side-milling plane 231. The left-right width of the flat plate portion 42 of the digger 4 is not greater than the left-right width of the side-milling plane 231, and the number of elongated connecting holes on the flat plate portion 42 is not greater than the number of threaded holes on the side-milling plane 231. The flat plate portion 42 of the digger 4 abuts against the side-milling plane 231. After the elongated connecting holes and threaded holes are aligned, they are connected by connecting bolts. The height of the digger 4 can be adjusted through the elongated connecting holes. The left-right width of the side-milling plane 231 is greater than the left-right width of the connecting portion 42 of the digger 4 to accommodate more sizes. The excavator 4 is adapted to accommodate blow-molded products with handles of different specifications. Several milling planes are spaced apart on the lower side wall of the rotating shaft 23. Equal height columns 24 are bolted to each milling plane. Deburring push plates 5 are arranged between the equal height columns 24. The deburring push plates 5 are parallel to the rotating shaft 23. The deburring push plates 5 are provided with scraping holes 51 that are adapted to the outer wall of the blow-molded product. The deburring push plates 5 abut against two side plates 21. A clearance inclined wall 211 is provided between the rear side wall and the bottom wall of the two side plates 21, so that the deburring push plates 5 can rotate smoothly backward. An air passage 52 is provided in the deburring push plates 5. The air inlet of the air passage 52 is connected to a compressed air source. A plug is provided in the air outlet of the air passage 52. Several air jet holes 53 connected to the air passage 52 are provided on the bottom wall of the deburring push plates 5. The air jet holes 53 are arranged along the scraping holes 51.

[0018] During use, the deflash removal pusher 5 abuts against the outer wall of the blow-molded product with a handle through the scraping hole 51. The lifting cylinder 11 drives the mounting frame 2 to descend, and the deflash removal pusher 5 also descends. The deflash removal pusher 5 scrapes down the outer wall of the blow-molded product through the scraping hole 51 to remove the deflash. Since the push cylinder 33 does not drive the rack 32 to move, the gear 31 on the rotating shaft 23 is locked, so the rotating shaft 23 will not rotate, and the deflash removal pusher 5 will not rotate. At the same time as scraping the deflash, the compressed air source introduces compressed gas into the air passage 52. The compressed gas is ejected downward from the jet hole 53, and the ejected compressed gas blows away the residual deflash hanging on the scraping hole 51. After the deflash on the outer wall of the blow-molded product with a handle is removed, the lifting cylinder 11 drives the mounting frame 2 to rise until the excavator 4 is horizontally aligned with the handle on the blow-molded product with a handle. Then, the push cylinder 33 drives the rack 32 to move downwards. The rack 32 drives the gear 31 and the shaft 23 connected to the gear 31 to rotate. The excavator 4 rotates forward and scrapes off the burrs in the concave area between the handle and the blow-molded product body through the curved part 41. The burr removal push plate 5 rotates backwards, and the burrs scraped off by the excavator 4 will fall directly downwards without contacting the burr removal push plate 5. This avoids the burrs on the excavator 4 falling onto the burr removal push plate 5. After the excavator 4 completes the burr removal work, the push cylinder 33 drives the rack to move upwards. The rack drives the gear 31 and the shaft 23 connected to the gear 31 to reverse. The excavator 4 rotates backwards and leaves the handle on the blow-molded product. The burr removal push plate 5 rotates forward until it abuts against the bottom wall of the side plate 21. At this time, the scraping hole 51 on the burr removal push plate 5 abuts against the outer side wall of the blow-molded product with the handle.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A flash removal device in an extrusion blow molding machine, characterized in that: include: A fixed plate is mounted on the extrusion blow molding machine. A lifting cylinder is vertically mounted on the fixed plate. A mounting bracket is connected to the piston rod of the lifting cylinder. A rotating shaft is rotatably mounted between the left and right side plates of the mounting bracket. The rotating shaft is connected to a drive mechanism fixed on the mounting bracket. A digging tool is vertically mounted on the rotating shaft to fit the concave area between the handle and the blow-molded product body. A deflashing push plate is mounted below the rotating shaft and is parallel to the rotating shaft. The deflashing push plate has scraping holes that fit the outer wall of the blow-molded product. The deflashing push plate abuts against the two side plates. A clearance inclined wall is provided between the rear side wall and the bottom wall of the two side plates.

2. The deflash removal device in the extrusion blow molding machine according to claim 1, characterized in that: The drive mechanism includes a gear, a rack, a push cylinder, and a protective shell. The protective shell and the push cylinder are fixed on the same side plate. The protective shell has a connecting guide hole and a round hole. The rack is slidably engaged in the guide hole and connected to the piston rod of the push cylinder. The gear is mounted on a rotating shaft and connected to the rotating shaft key. The gear is located in the round hole and meshes with the rack.

3. The deflash removal device in the extrusion blow molding machine according to claim 1, characterized in that: A side milling plane is provided on the rear side wall of the rotating shaft. Several threaded holes are provided at equal intervals on the side milling plane. The left and right width of the excavator is not greater than the left and right width of the side milling plane. The excavator is provided with a curved part that matches the concave area between the handle and the blow-molded product body, and a flat part that abuts against the milling plane. Several connecting elongated holes are provided on the flat part. The number of connecting elongated holes is not greater than the number of threaded holes. The connecting elongated holes and the threaded holes are aligned and connected by connecting bolts.

4. The deflash removal device in the extrusion blow molding machine according to claim 3, characterized in that: Several milling planes are spaced apart on the lower side wall of the rotating shaft. Equal height columns are bolted to each milling plane, and the flash removal push plate is connected to the equal height columns.

5. The deflash removal device in the extrusion blow molding machine according to claim 1, characterized in that: Four guide sleeves are provided around the fixed plate, and guide rods are slidably locked in the guide sleeves. A moving plate is connected between the tops of the four guide rods. A clearance hole for the lifting cylinder is opened on the moving plate. A transition plate is provided on the top of the mounting frame, and a connecting plate is provided on the transition plate. The four guide rods are connected to the connecting plate, and the piston rod of the lifting cylinder is connected to the connecting plate.

6. The deflash removal device in the extrusion blow molding machine according to claim 1, characterized in that: A support rod is installed between the left and right side plates of the mounting bracket.

7. The deflash removal device in the extrusion blow molding machine according to claim 1, characterized in that: An air passage is provided in the flash pusher plate. The air inlet of the air passage is connected to a compressed air source. A plug is provided in the air outlet of the air passage. Several jet holes connected to the air passage are provided on the bottom wall of the flash pusher plate. The jet holes are arranged along the scraping holes.

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