Automatic feeding system for blow molding plastic bottle preforms

Abstract

The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic feeding systems of blow molding plastic bottle embryo, mainly related to blow molding feeding technical field.The application discloses a kind of automatic

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blow molding, and particularly relates to an automatic feeding system for blow molding plastic bottle preforms. BACKGROUND

[0002] In the blow molding production process of plastic bottles, the preformed handle needs to be positioned before molding. Most small and medium-sized manufacturers still use manual feeding operation, and a few large-scale production lines use automatic production equipment. The working process generally includes: preform conveying, preform feeding into the mold, mold pre-closing, handle feeding, blow molding, mold opening and discharging / picking. Regardless of the mechanical structure used to realize the above actions, they are all designed according to this process step. For large-scale automatic production, there is a significant disadvantage, which is the lag of production rhythm. In the series of actions of "grasping-moving-inserting" of the mechanical hand, the first action will inevitably become a beat point in the whole production cycle. The mechanical hand needs to be accurately positioned and moved in at least two positions, and also needs to complete the actions of grasping and inserting the handle, which significantly lengthens the beat point time. For a continuous and efficient production line, this action is likely to be the longest lag factor in the whole process, which becomes the bottleneck of production capacity improvement. In addition, the actions of preform feeding into the mold, handle feeding and mold closing depend on each other in time sequence and coordination, thereby increasing the complexity and difficulty of multi-action control, especially in a high-frequency continuous operation environment, which increases the risk probability of system failure and reduces the stability of overall operation. Moreover, each molding depends on the same action, and once an error occurs, a large number of defective products may be produced, causing waste of materials and energy, and pressure on production cost control. SUMMARY

[0003] The present application aims to provide an automatic feeding system for blow molding plastic bottle preforms, which embeds the serial process of "handle installation" into the existing beat gap of preform conveying through high mechanical integration and synchronization, and realizes the overall improvement of production rhythm.

[0004] To achieve the above-mentioned purpose, the present application realizes the following technical scheme:

[0005] An automatic feeding system for blow molding plastic bottle preforms, comprising:

[0006] A rotating unit outputs a plurality of sliding tables in rotating conveying;

[0007] A feeding unit comprises a positioning trough, one end of the positioning trough close to the rotating unit is a feeding end, the positioning trough is provided with a sunken notch at the feeding end, when the handle is located at the feeding end of the positioning trough, the upper part of the handle is exposed outside the notch,

[0008] The work station unit comprises a work station support installed on a sliding table, a bottle embryo seat and a mounting frame are arranged on the work station support, a fixed shaft and a driving shaft are installed on the mounting frame and arranged oppositely in an axial direction, an oscillating shaft is arranged at one end of the driving shaft close to the fixed shaft, the driving shaft is driven by a stepping motor and has an oscillating stroke, the oscillating shaft has an upright position and a horizontal position based on the oscillating stroke, a conical linkage gear is arranged at the bottom of the oscillating shaft, a linkage gear disc is fixed on the fixed shaft and engaged with the linkage gear, when the oscillating shaft oscillates 90 degrees along the driving shaft based on the engagement of the two, the oscillating shaft rotates 180 degrees, a pneumatic gripper is installed above the oscillating shaft, the pneumatic gripper extends vertically relative to the oscillating shaft and has a jaw block at the end, and the jaw block is located at a notch position when the oscillating shaft is in the horizontal position.

[0009] A transition flange is fixed at the top end of the oscillating shaft, a vertical arm is fixed in the same direction and coaxially arranged on the top surface of the transition flange, the pneumatic gripper is installed on the vertical arm at the top end, the pneumatic gripper is of a parallel opening and closing type, and comprises a pneumatic gripper main body, the jaw block is arranged at the outer end of the pneumatic gripper main body, the pneumatic gripper main body is arranged vertically relative to the oscillating shaft, and a clamping plate is fixed on the jaw block and arranged side by side relative to the vertical arm.

[0010] The vertical arm is a straight column with a square cross section, and mounting holes are equidistantly arranged on the four surfaces of the vertical arm, a U-shaped mounting piece is arranged on the top of the vertical arm and has a width suitable for the vertical arm, and fasteners are horizontally penetrated through the mounting piece and matched with the mounting holes.

[0011] The rotary unit comprises a rectangular-shaped track, the sliding table is equidistantly and slidingly connected to the track, and the sliding table is driven by a belt drive or a chain drive.

[0012] The feeding unit further comprises a conveying mechanism, the conveying mechanism comprises a conveying belt with linear conveying capacity, the conveying belt is vertically and staggered arranged with a positioning chute, the positioning chute has a U-shaped cross section and extends horizontally, the bottom of the positioning chute is coplanar with the conveying belt, the bottom of the positioning chute is provided with a butt joint surface corresponding to the conveying belt, a feeding port is arranged on the wall of the positioning chute close to the incoming material end of the conveying mechanism, the feeding port corresponds to the position and width of the butt joint surface, and a push block is arranged in the positioning chute and slidingly matched with the length direction of the positioning chute.

[0013] The upper end of the gap is provided with an end plate with a height not less than the width of the handle, the top side gap of the positioning chute is provided with a fin plate, the fin plate is fixed with a rail cylinder arranged horizontally along the length direction of the positioning chute, the cylinder is provided with a cylinder rod telescopically matched with the cylinder, the end of the cylinder rod is fixed with a fixing piece, the lower part of the fixing piece is fixed with a pull rod, the other end of the pull rod is fixed on a push block, so that the push block has a reciprocating pushing stroke along the length direction of the positioning chute, the push block has a front stroke position and a rear stroke position based on the pushing stroke, when the push block is away from the end plate by a length of one handle, the push block is located at the front stroke position and covers the feeding port, when the push block is reset to the rear stroke position, the push block is arranged in a staggered manner with the feeding port.

[0014] The depth of the positioning chute is greater than the width of the handle, and / or the width of the positioning chute is adapted to the thickness of the handle.

[0015] The two sides of the conveying belt are provided with racks, the racks are fixed with vertical mounting blocks through fasteners, the upper part of the conveying belt is provided with two vertical baffle plates arranged side by side, the distance between the baffle plates is adapted to the length of the handle, the outer end face of the baffle plate is fixed with a horizontally outward extending connecting rod, the outer end of the connecting rod penetrates the mounting block, the top end of the mounting block is threadedly matched with a fastening screw, and the inner end of the fastening screw abuts against the connecting rod.

[0016] The conveying belt is placed with a rear blocking stand, the rear blocking stand is an L-shaped metal plate, and the vertical end face of the rear blocking stand is used to contact the last handle.

[0017] The rotary unit is sequentially provided with a bottle embryo feeding position, a heating device, a handle feeding position and a blow molding station along the stroke path of the sliding table, the feeding unit is correspondingly arranged at the handle feeding position, and the feeding method executed includes the following steps.

[0018] Feeding the bottle embryo to the bottle embryo seat on the sliding table;

[0019] Preheating the bottle embryo;

[0020] The swinging shaft swings outward by 90 degrees from the vertical position to the horizontal position, the linkage swinging shaft rotates by 180 degrees, the clamping block of the air claw is downward and opened, the upper side of the handle at the feeding end is clamped and grabbed, the swinging shaft swings upward by 90 degrees from the horizontal position to the vertical position, the linkage swinging shaft rotates by 180 degrees, and the handle is located on one side of the bottle embryo.

[0021] The station unit enters the blow molding station to perform blow molding under the condition that the relative position relationship between the handle and the bottle embryo is kept unchanged.

[0022] Compared with the prior art, the beneficial effects of the present application are as follows:

[0023] The system realizes efficient integration of production rhythm by precisely embedding the handle feeding process into the conveying stage after the bottle blank heating and before the mold entering. The system uses the inherent intermittent or moving time in the bottle blank conveying to complete the rapid grabbing and positioning of the handle, realizes the evolution from "series production" to "parallel production", and brings about overall performance improvement. The whole process relies on simple mechanical linkage, responds quickly and does not need additional delay. This not only avoids the rhythm bottleneck caused by the serial operation of the manipulator in the mold closing station in the traditional scheme, but also significantly improves the overall efficiency through process parallelization, reduces the cost and failure rate, so that the whole production line realizes synchronous production with more compact rhythm and smoother operation under the premise of ensuring high precision and high reliability. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the overall layout schematic diagram of the present application (in the area shown by the dotted line in the figure, A is the bottle blank feeding position, B is the heating equipment, C is the handle feeding position, D is the blow molding station, and E is the unloading station).

[0025] Figure 2 is a partial top view of the handle feeding position of the present application.

[0026] Figure 3 is a schematic diagram of the handle feeding position in embodiment 3 of the present application.

[0027] Figure 4 is a schematic diagram of the present application Figure 2 is a schematic diagram of the structure under AA section.

[0028] Figure 5 is a schematic diagram of the station unit in embodiment 3 of the present application.

[0029] Figure 6 is a schematic diagram of the feeding unit of the present application.

[0030] Figure 7 is a component split schematic diagram of the feeding unit of the present application.

[0031] Figure 8 is a bottom schematic diagram of the positioning trough and the rail cylinder.

[0032] Reference signs shown in the drawings:

[0033] 1, back rail; 2, sliding table; 3, station support; 4, bottle embryo seat; 5, mounting frame; 6, fixed shaft; 7, linkage gear; 8, drive shaft; 9, linkage gear; 10, swing shaft; 11, vertical arm; 12, air claw main body; 13, clamp block; 14, clamping plate; 15, mounting; 16, mounting hole; 17, conveying belt; 18, rack; 19, baffle; 20, connecting rod; 21, mounting block; 22, fastening screw; 23, rear stop; 24, positioning chute; 25, notch; 26, end plate; 27, butt joint; 28, feed inlet; 29, push block; 30, fin plate; 31, rail cylinder; 32, linear rail; 33, slide bar; 34, cylinder rod; 35, pull rod; 36, fixing piece. DETAILED DESCRIPTION

[0034] The application will be further described below in connection with specific embodiments. It should be understood that these embodiments are only used to explain the application and not used to limit the scope of the application. Furthermore, it should be understood that those skilled in the art can make various modifications or changes to the application after reading the content of the application, and these equivalent forms also fall within the scope defined by the application.

[0035] The instruments, reagents, materials and the like involved in the following examples are conventional instruments, reagents, materials and the like existing in the prior art, which can be obtained through regular commercial channels, unless otherwise specified. The experimental methods, detection methods and the like involved in the following examples are conventional experimental methods, detection methods and the like existing in the prior art, unless otherwise specified. Example 1

[0036] The system is mainly aimed at feeding of the molding station, that is, feeding of the mold.

[0037] The system innovatively positions the handle in the conveying link based on the existing track structure commonly used for automatic conveying of bottle embryos. The track structure used in this example is a ring-shaped guide rail mechanism, which is arranged along the production line in a ring shape. The bottle embryos are continuously conveyed on the guide rail. The overall structure of the system includes a rotating unit, a station unit and a feeding unit.

[0038] (1) Rotating unit

[0039] The ring-shaped guide rail frame structure is the basic route for the entire conveying and feeding, and provides a fixed path for the movement of the station unit. Specifically, it includes a bottom frame, which is made of a high-strength metal frame, such as a steel frame structure, to ensure the stability of the overall system structure. The bottom frame is provided with a back rail 1. A square rotating rail is used to facilitate the arrangement of production stations at various positions.

[0040] The said meander track 1 has 4 90-degree turns based on its rectangular shape, chain wheels or belt wheels are arranged at the turns, and a transmission chain wound on the chain wheels or a synchronous belt wound on the belt wheels are arranged inside the meander track 1, a servo motor is installed on one of the belt wheels or chain wheels, and the circulation operation is realized by motor driving.

[0041] A plurality of sliding platforms 2 are slidably fitted on the meander track 1 at equal intervals, and the sliding platforms 2 are used to load and move the station units. The inner end of the sliding platform 2 is fixed on the transmission chain or synchronous belt through a connecting piece, and the sliding platform 2 is circulated along the track by synchronous belt or chain transmission, and the movement speed and position of the sliding platform 2 are accurately controlled by the servo motor. Each sliding platform 2 is detachably connected with the station unit, which is convenient for maintenance and replacement. The drive system of the rotating unit is equipped with a position feedback device (such as a position sensor commonly used on the side of the track), which ensures that the accuracy of each station stopping at the designated site reaches ±0.1 mm, meeting the stability requirements under high-speed continuous operation.

[0042] (2) Station unit

[0043] The station unit includes a station support 3 mounted on the sliding platform 2, the station support 3 is fixed on the sliding platform 2 by fasteners, and the main bearing part of the station support 3 is arranged outside the meander track 1, which is convenient for installation and cooperation with other components, and also facilitates the bottom butt joint of inflation.

[0044] The station support 3 is fixed with a bottle embryo seat 4 penetrating up and down, the bottle embryo seat 4 is an annular member and is arranged vertically in the axial direction, the top end of the bottle embryo seat 4 is used for inserting the bottle mouth of the bottle embryo, and the bottom end of the bottle embryo seat 4 is used for sealing butt joint with the blow molding die head of the blow molding equipment, so as to realize the directional pressurization of the inside of the bottle embryo.

[0045] The bottle embryo seat 4 is used to keep the bottle embryo upright on one hand, and to provide a stable air passage for the subsequent blow molding process on the other hand, the inner wall of the bottle embryo seat 4 is precisely matched with the mouth part of the bottle embryo to prevent air leakage during pressurization. The top end of the bottle embryo seat 4 is tightly inserted into the connection part of the bottle embryo mouth to ensure close cooperation.

[0046] The work station support 3 is provided with a sunken extension mounting rack 5 on the side away from the meandering track 1, the mounting rack 5 adopts a groove type structure, and a fixed shaft 6 and a driving shaft 8 are independently mounted in the groove type mounting rack 5, the fixed shaft 6 and the driving shaft 8 are coaxially arranged, the fixed shaft 6 is fixedly mounted on the mounting rack 5, a linkage gear disc 7 is fixed to one end of the fixed shaft 6 close to the driving shaft 8, the outer end of the driving shaft 8 is driven to rotate by a stepping motor mounted on the mounting rack 5, one end of the driving shaft 8 close to the fixed shaft 6 is fixedly connected with a swing shaft 10 through a key, the swing shaft 10 has a swing stroke based on the driving of the stepping motor, the swing stroke makes the swing shaft 10 swing from vertical to horizontal, and defines that when the swing shaft 10 is in the vertical state, it is in the vertical position, and when the swing shaft 10 is in the horizontal state, it is in the horizontal position, and when the swing shaft 10 is in the horizontal position, one end of the swing shaft 10 away from the driving shaft 8 is arranged away from the meandering track 1. The bottom end of the swing shaft 10 is coaxially fixed with a linkage gear 9, the linkage gear 9 is a conical gear and is engaged with the linkage gear disc 7, so that when the swing shaft 10 rotates 90 degrees, the swing shaft 10 rotates 180 degrees along its axial direction, realizing the overturning of the air claw mounted at the top end thereof.

[0047] The top end of the swing shaft 10 is fixed with an adapter flange through a fastener and a flange piece, the top surface of the adapter flange is fixedly provided with a vertical arm 11 coaxially and in the same direction with the swing shaft 10, the vertical arm 11 is provided with an air claw at the top end, the air claw is a parallel opening and closing type, including an air claw body 12, two symmetrically arranged jaw blocks 13 are arranged at one end of the air claw body 12 away from the vertical arm 11, the jaw blocks 13 on both sides are symmetrically distributed and parallel to each other, and can be closer or farther away, so as to more stably clamp the handle. The air claw of this type is a pneumatic actuator, the jaw blocks 13 are driven to open and close by controlling the air pressure, and the accurate grabbing and releasing of the handle are realized.

[0048] The inner side of the jaw block 13 is fixed with a clamping plate 14 through a fastener, the clamping plate 14 extends horizontally along the direction perpendicular to the operation of the jaw block 13, can adapt to the feature that the handle extends in an arc shape on the outside, increase the range of contact with the handle, and improve the clamping precision and reliability. The air claw body 12 as a whole adopts a straight column shape with a rectangular cross section, has a simple shape, and can be conveniently matched with a reserved port position during mold closing. The length direction of the air claw body 12 is perpendicular to the swing shaft 10, and the air claw body 12 and the swing shaft 10 form an L-shaped structure, that is, when the swing shaft 10 is in the vertical position, the air claw body 12 extends horizontally.

[0049] The U-shaped mounting piece 15 is sleeved on the vertical arm 11, the vertical arm 11 is a straight column body with a square cross section, and mounting holes 16 are penetrated through four surfaces of the vertical arm 11 along the length direction at equal intervals, forming a modular profile, facilitating direct cutting and direct installation according to the length requirement, and a fastening bolt is penetrated through the mounting piece 15 and matched with the mounting hole 16.

[0050] Based on the above structure, when the step motor drives the driving shaft 8 to rotate, the driving swing shaft 10 swings around the center of the fixed shaft 6, realizing precise stroke control from the vertical position to the horizontal position, the linkage gear 9 rotates and engages with the linkage gear disc 7, so that the linkage swing shaft 10 rotates 180 degrees along the axial direction, and the gas claw is turned over, specifically: the gas claw body 12 is turned over from the horizontal state of the clamp block 13 inward (the handle is positioned on the bottle embryo side) to the vertical state of the gas claw body 12 and the clamp block 13 downward (located at the position of the handle). The turning and swinging process is smooth and responsive, and the precision control directly depends on the mechanical linkage, without the need for a visual recognition system or a sensor positioning, reducing the system complexity and cost, and improving the operation reliability.

[0051] (3) Feeding unit

[0052] The feeding unit is specifically used for feeding the handle.

[0053] A handle feeding position is arranged outside the rotary track, and the feeding unit includes a positioning chute 24 and a conveying mechanism arranged at the handle feeding position.

[0054] The conveying mechanism adopts a belt conveyor, and since the handle is vertically placed on the conveying belt 17, the contact area of each handle with the conveying belt 17 is small, so other conveying structures such as chain plates are not recommended, which may easily jam or scratch the plastic handle.

[0055] The conveying module comprises a waist-shaped rotating conveying belt 17, the top surface of the upper belt surface of the conveying belt 17 is used for placing the handles in a row, the handles are manually or automatically fed on the conveying belt 17 after unpacking (plastic film), symmetrical racks 18 are arranged on both sides of the conveying belt 17, rotating pulleys are respectively arranged at both ends of the racks 18, the conveying belt 17 is wound between the pulleys, one of the pulleys is driven by a motor arranged on the rack 18, two baffle plates 19 are vertically arranged above the conveying belt 17, the spacing of the baffle plates 19 is adapted to the length of the handle, a horizontal outward extending connecting rod 20 is fixed on the outer end surface of the baffle plate 19, the outer end of the connecting rod 20 penetrates through a mounting block 21, the bottom of the mounting block 21 is fixed on the outer side of the rack 18 by a fastener, a fastening screw 22 is threadedly connected to the top end of the mounting block 21, the inner end of the fastening screw 22 abuts against the connecting rod 20, the above mounting mode is simple and can quickly set the spacing of the two baffle plates 19 to be adapted to the length of the handle, a plurality of groups of the connecting rod 20 and the mounting block 21 can be arranged to improve the positioning effect and stability of the baffle plate 19.

[0056] By adjusting the spacing of the two baffle plates 19, replacing the positioning trough 24 and the push block 29 with different groove widths, the handles of different sizes can be adapted. The modular design gives the production line the ability to cope with multi-specification production.

[0057] The rear blocking stand 23 is placed on the conveying belt 17 by self-weight stability, the rear blocking stand 23 can follow the conveying belt 17 to move synchronously, the vertical end surface of the rear blocking stand 23 is used for contacting the last handle of the stack of handles to realize the forward pushing of the handle.

[0058] One end of the conveying mechanism is provided with a positioning trough 24 vertically intersecting above the conveying mechanism, the inner side of the handle is matched in the positioning trough 24, the cross section of the positioning trough 24 is U-shaped, and the positioning trough 24 extends horizontally, the end of the positioning trough 24 close to the U-shaped track 1 is the feeding end, the groove wall close to the feeding end of the positioning trough 24 is provided with a downward notch 25, which facilitates the exposure of the top side of the handle at the position, the feeding end of the notch 25 is provided with an end plate 26 with a height not less than the width of the handle, based on the irregular shape of the handle, the end plate 26 at the feeding end can block and position the front end of the handle.

[0059] The groove depth of the positioning trough 24 is greater than the width of the handle, and the entire handle can be accommodated.

[0060] The groove width of the positioning trough 24 is adapted to the thickness of the handle, which facilitates the sliding of the handle in the groove.

[0061] The bottom of the positioning trough 24 is provided with a docking interface 27 corresponding to the position of the conveying belt 17, the docking interface 27 is arranged across the belt surface of the conveying belt 17, the wall of the positioning trough 24 near the baffle 19 is provided with a feeding port 28, the feeding port 28 corresponds to the position and width of the docking interface 27, and the length of one handle corresponds to the length of the handle, so that the handle can enter the positioning trough 24 through the feeding port 28, and the handle is always conveyed (in the direction of the positioning trough 24) through the conveying belt 17 during the entering process, until the handle is completely entered into the positioning trough 24, and finally stopped by the wall of the positioning trough 24 on the opposite side of the feeding port 28.

[0062] The bottom of the positioning trough 24 is coplanar with the top surface of the conveying belt 17, and the handle pushed out from the conveying belt 17 can be smoothly taken.

[0063] The positioning trough 24 is provided with a push block 29 slidingly fitted along the length direction of the positioning trough 24, the thickness of the push block 29 is adapted to the groove width of the positioning trough 24, the height of the push block 29 is adapted to the height of the positioning trough 24, the bottom side of the push block 29 is located above the conveying belt 17, the length of the push block 29 is longer than the feeding port 28, and when the front end of the push block 29 is away from the feeding end by a distance of one handle length, the push block 29 covers the position of the feeding port 28, and blocks and prevents the subsequent handle from entering the positioning trough 24.

[0064] In terms of power, the wing plate 30 is arranged at the top side notch of the positioning trough 24, the horizontal rail cylinder 31 is fixed on the wing plate 30 through fasteners and arranged horizontally along the length direction of the positioning trough 24, the linear rail 32 for assisting the stability of the linear stroke of the rail cylinder 31 is fixed on the rail cylinder 31, the cylinder rod 34 telescopically matched with the rail cylinder 31 is arranged at one end of the rail cylinder 31 away from the feeding end, the fixing piece 36 is fixed at the end of the cylinder rod 34, the slide bar 33 is fixed at the top end of the fixing piece 36, the slide groove is arranged on the bottom surface of the slide bar 33 and slidingly matched with the slide rail, which can improve the stability of the extension and retraction of the cylinder rod 34 and reduce the stress loss. The pull rod 35 is fixed on the push block 29 at the other end of the pull rod 35, which realizes the reasonable installation layout.

[0065] When the slide table 2 and the work station unit are located at the handle feeding position, and when the swing shaft 10 is located at the horizontal position, the jaw block 13 of the gas claw is located at the notch 25 and corresponds to the upper side position of the handle at the feeding end.

[0066] Based on the above structure, the sliding stroke of the push block 29 is accurately driven by the extension and retraction of the track cylinder 31, so that the push block 29 linearly reciprocates in the positioning chute 24 to realize the pushing stroke. The pushing stroke handle has a front stroke position and a rear stroke position. When the handle enters the positioning chute 24 through the conveying belt 17, the push block 29 performs the pushing stroke. When the push block 29 moves to the front stroke position, the front end of the push block 29 is spaced apart from the end plate 26 by a handle length, so as to push the handle to the upper end, thereby accurately positioning the handle at the upper end. At this time, the push block 29 covers the feeding port 28 to prevent the handle from entering the positioning chute 24. Then, the push block 29 moves to the rear stroke position, and the push block 29 is arranged in a staggered manner with the feeding port 28 to release the blocking of the handle.

[0067] When the swing shaft 10 is in the horizontal position, the top side of the handle at the upper end position is located between the two clamping blocks 13, thereby realizing accurate clamping positioning.

[0068] Based on the system, the following time sequence actions are performed, and the implemented feeding method is:

[0069] The stacked handles are fed onto the conveying belt 17 with one side (generally a flat surface) located in the bottle, and the handles are located between the two baffles 19. The rear blocking stand 23 is attached to the last handle on the conveying belt 17.

[0070] The upper surface of the conveying belt 17 faces the direction of the positioning chute 24 (the feeding end of the conveying belt 17 is defined as its front end, and the upper end of the positioning chute 24 is defined as its front end). The handle at the front end is conveyed along with the conveying belt 17, passes through the feeding port 28, enters the upper side of the positioning chute 24, and is stopped by the chute wall. The push block 29 pushes the handle at the upper end of the positioning chute 24 to the front end, and accurately positions the handle at the upper end of the positioning chute 24 based on the spacing between the push block 29 and the end plate 26 corresponding to the length of the handle.

[0071] The sliding table 2 rotates on the meandering track 1 to drive the work station unit to rotate. When the work station unit passes through the handle feeding position, the position sensor on the meandering track 1 feeds back to stop. The swing shaft 10 swings outward by 90 degrees from the vertical position to the horizontal position, and the swing shaft 10 rotates by 180 degrees in linkage. The clamping blocks 13 of the air gripper open downward to clamp and grasp the upper side of the handle at the upper end. The swing shaft 10 swings upward by 90 degrees from the horizontal position to the vertical position, and the swing shaft 10 rotates by 180 degrees in linkage, so that the handle is located on one side of the bottle embryo.

[0072] The work station unit carries the handle and the bottle embryo in a fixed relative position relationship to rotate along the meandering track 1, and can directly enter the mold closing station for blow molding.

[0073] The above production method is to make the handle form a fixed positional relationship with the preform during the feeding and conveying of the preform. The advantage of this method is that:

[0074] 1) The production rhythm is integrated.

[0075] The core timing advantage of this design is its excellent rhythm integration capability. In the blow molding production line, the preform itself has inherent periodic pauses in processes such as feeding, positioning, and mold closing. This system cleverly embeds the handle's grabbing and positioning actions into these existing rhythm gaps, such as using the pause period during preform feeding. Due to the high simplification and integration of the handle's grabbing and flipping positioning actions, only a fast 90-degree swing and synchronous mechanical linkage are required, the entire process responds quickly, takes very little time, and does not require complex visual recognition or feedback adjustment. The time requirement can be fully accommodated by the inherent pause time required for preform feeding.

[0076] In contrast, the traditional method must introduce an independent, serial mechanical hand feeding process before mold closing. The complex "grabbing-moving-precise positioning-inserting" action chain inevitably requires the production line to extend the pause time, thus becoming a bottleneck that restricts the overall rhythm.

[0077] Therefore, this scheme breaks the time delay of traditional processes that can only rely on serial steps to perform additional actions one after another by parallelizing additional actions, achieving fundamental optimization in production rhythm and completing the simultaneous feeding of handles without any additional delay, which brings significant efficiency improvement and speed breakthrough to the entire production process.

[0078] 2) Easy to control, execute precise "handle-preform" relative position relationship, and the handle feeding position is determined and locked by mechanical structure (positioning chute 24, push block 29, gas claw) once. In the entire subsequent process, this relationship does not change. The 180-degree mechanical linkage of the swing shaft 10 and the self-rotation in the work unit ensures the accurate flipping of the grabbing hand between the picking (horizontal position, jaws downward) and positioning (vertical position, jaws inward) states in a purely mechanical way. This scheme is lower in cost, faster in response, highly reliable, and free from debugging compared to schemes that rely on multiple servo motors and sensors for positioning.

[0079] 3) Significantly reduce comprehensive cost

[0080] The combination of "conveying belt 17 + positioning tank 24 + push block 29" in the feeding unit constitutes an efficient and reliable feeding process, which can accurately push and position a single handle at the "feeding end". The precision is not inferior to that of expensive visual positioning systems. In the grabbing and positioning action, it is completed through mechanical linkage, which saves expensive high-precision six-axis robots and does not need complex identification feedback and other information dependence. The mechanical linkage mechanism and the maintenance-friendly modular design make the system have lower failure rate, easier maintenance, shorter downtime and significantly lower long-term operating costs. Embodiment 2

[0081] Based on the basis of embodiment 1, considering the mold closing step, if the mold action is simplified, the mold can be arranged on both sides of the track. Specifically, it can be:

[0082] The meandering track 1 is sequentially provided with a preform feeding position, a heating device, a handle feeding position, a blow molding station, and a discharging station along its conveying direction.

[0083] The preform feeding position is used to feed the preform at this position. Any method of existing technology such as a turnover table (with a clamping arm), a robot, manual work, etc. can be used to feed the preform on the preform seat 4 of the work station unit and press it down tightly. After the preform is fed onto the work station support 3, it can move with the conveying rhythm of the conveying unit.

[0084] The heating device is a door-shaped structure that straddles a section of the meandering track 1 to preheat the entering and passing preforms, preparing for subsequent stretching. Any existing heating device for blow molding can be used.

[0085] The handle feeding position is arranged in the conveying section before the preform leaves the heating device and enters the mold. The preform feeding position or / and the pause rhythm of the mold closing is used to grab and lock the handle on one side of the preform, keeping the relative position relationship between the handle and the preform unchanged in the subsequent process.

[0086] The blow molding station is provided with blow molding equipment, including a mold closing mechanism, a mold, a blowing system, a cooling system, etc. The mold closing mechanism is used to open and close the mold, generally using a guide mechanism and a cylinder as the drive. The mold can be horizontally opened and closed, hinged to open and close, etc. In the horizontal opening and closing, it can be left-right opening and closing or up-down opening and closing, combined with horizontal movement and lifting, etc. to close and form the preform. The blowing system is used to blow high-pressure gas into the preform to make it expand and form in the mold. The cooling system is used to cool the molded plastic bottle to ensure that it can be smoothly demolded.

[0087] The discharging station discharges the molded handle plastic bottle. It can be realized by using existing common discharging equipment for plastic bottles such as manual work, mechanical discharging, robot grabbing, turnover table, etc.

[0088] The process realizes efficient integration of production rhythm through optimization. The system uses the inherent intermittent or moving time in the bottle embryo conveying to complete the rapid grabbing and positioning of the handle, avoids the rhythm bottleneck caused by the serial operation of the manipulator at the mold closing station in the traditional scheme, and significantly improves the overall efficiency through process parallelization. The entire production line realizes more compact rhythm and smoother operation under the premise of ensuring high precision and high reliability. Example 3

[0089] On the basis of example 1, this example considers the arrangement of the mold, and replaces the mounting method of the mounting frame 5 and the station support 3 from fixed mounting to rotary mounting, that is, the top of the mounting frame 5 is mounted on the bottom of the station support 3 along the bottle embryo seat 4 in the axial direction, and the rotary travel is set to 90 degrees. Two working travel positions are set: the feeding travel position and the mold closing travel position.

[0090] Feeding travel position: the mounting frame 5 and the vertical arm 11 are located away from the sliding table 2, and the mounting frame 5 and the station support 3 extend in the same direction, at this time when the swing shaft 10 is in the horizontal position, the jaw block 13 corresponds to the top side position of the handle of the feeding end.

[0091] Mold closing travel position: the mounting frame 5 rotates 90 degrees from the feeding travel position to one side of the station support 3.

[0092] The rotating action can be performed during the sliding of the sliding table 2, without the need to stop.

[0093] By rotating the mounting frame 5 to one side of the bottle embryo, the distance from the handle to the meandering track 1 is equal to the distance from the bottle embryo to the meandering track 1, so that the mold with left and right opening and closing can be arranged on both sides of the meandering track 1, and there is no need for lifting or other actions to correspond, the action can be more simplified, and the speed can be further improved.

[0094] However, the same, increasing a rotating action, will increase the structure and the small loss of precision, so reasonable selection can be made according to the configuration and production requirements.

Claims

1. An automatic feeding system for blow-molded plastic bottle preforms, characterized in that, include: Rotary unit, outputting multiple slides with rotary conveying (2); The feeding unit includes a positioning trough (24), the end of which near the rotating unit is the feeding end. The positioning trough (24) has a recessed notch (25) at the feeding end. When the handle is located at the feeding end of the positioning trough (24), the upper part of the handle is exposed outside the notch (25). The feeding unit also includes a conveying mechanism, which includes a conveyor belt (17) with linear conveying capability. The conveyor belt (17) is perpendicularly intersecting the positioning trough (24). The positioning trough (24) has a section that runs along its length. The sliding push block (29) has an end plate (26) at the feeding end of the notch (25) with a height not less than the handle width, so that the push block (29) has a reciprocating pushing stroke along the length direction of the positioning groove (24). The push block (29) has a front stroke position and a rear stroke position based on the pushing stroke. When the push block (29) is one handle length away from the end plate (26), the push block (29) is located at the front stroke position and covers the feed port (28). When the push block (29) is reset to its rear stroke position, the push block (29) and the feed port (28) are misaligned. The workstation unit includes a workstation bracket (3) mounted on a slide table (2). The workstation bracket (3) has a preform holder (4) and a mounting bracket (5). The mounting bracket (5) has an axially aligned and oppositely arranged fixed shaft (6) and a drive shaft (8). The drive shaft (8) has a swing shaft at one end near the fixed shaft. The drive shaft (8) is driven by a stepper motor and has a swing stroke. The swing shaft (10) has an upright position and a horizontal position based on its swing stroke. The bottom of the swing shaft (10)... The part is provided with a conical linkage gear (9), and a linkage gear disk (7) that meshes with the linkage gear (9) is fixed on the fixed shaft (6). When the two mesh, the swing shaft (10) swings 90 degrees along the drive shaft (8) and the swing shaft (10) rotates 180 degrees. A pneumatic gripper is installed above the swing shaft (10). The pneumatic gripper extends vertically relative to the swing shaft (10) and has a clamp block (13) at its end. When the swing shaft (10) is in a horizontal position, the clamp block (13) is located at the notch (25).

2. The automatic feeding system for blow-molded plastic bottle preforms according to claim 1, characterized in that, The top end of the swing shaft (10) is fixed with a transition flange. The top surface of the transition flange is fixed with a vertical arm (11) that is coaxial and in the same direction as the swing shaft (10). The pneumatic gripper is mounted on the vertical arm (11) at the top end. The pneumatic gripper is a parallel opening and closing type, including a pneumatic gripper body (12). The gripper block (13) is set at the outer end of the pneumatic gripper body (12). The pneumatic gripper body (12) is set perpendicular to the swing shaft (10). The gripper block (13) is fixed with a clamping plate (14) that is arranged parallel to the vertical arm (11).

3. The automatic feeding system for blow-molded plastic bottle preforms according to claim 2, characterized in that, The upright arm (11) is a straight column with a square cross section, and mounting holes (16) are provided at equal intervals on the four sides of the upright arm (11). The top of the upright arm (11) is provided with a U-shaped mounting piece (15) adapted to its width, and fasteners that cooperate with the mounting holes (16) are horizontally inserted through the mounting piece (15).

4. The automatic feeding system for blow-molded plastic bottle preforms according to claim 1, characterized in that, The rotary unit includes a rectangular loop track (1), and the slide (2) is equidistantly slidably connected to the loop track (1). The slide (2) is based on belt drive or chain drive.

5. The automatic feeding system for blow-molded plastic bottle preforms according to claim 1, characterized in that, The feeding unit also includes a conveying mechanism, which includes a conveyor belt (17) with linear conveying capability. The conveyor belt (17) and the positioning trough (24) are arranged perpendicularly and alternately. The positioning trough (24) has a U-shaped cross section and extends horizontally. The bottom of the positioning trough (24) is coplanar with the conveyor belt (17). The bottom of the positioning trough (24) is provided with a mating interface (27) corresponding to the conveyor belt (17). The positioning trough (24) is provided with a feed inlet (28) on the wall near the material receiving end of the conveying mechanism. The position and width of the feed inlet (28) correspond to the mating interface (27). The positioning trough (24) is provided with a pusher block (29) that slides and cooperates with it along its length direction.

6. The automatic feeding system for blow-molded plastic bottle preforms according to claim 5, characterized in that, The feeding end of the notch (25) is provided with an end plate (26) with a height not less than the width of the handle. The top side opening of the positioning groove (24) is provided with a wing plate (30). A rail cylinder (31) is fixed on the wing plate (30) and is horizontally arranged along the length of the positioning groove (24). The end of the cylinder away from the feeding end is provided with a cylinder rod (34) that is telescopically coordinated with it. A fixing member (36) is fixed at the end of the cylinder rod (34). A pull rod (35) is fixed at the lower part of the fixing member (36). The other end of the pull rod (35) is fixed on the push block (29), so that the push block (29) has a reciprocating pushing stroke along the length direction of the positioning groove (24). The push block (29) has a front stroke position and a rear stroke position based on the pushing stroke. When the push block (29) is one handle length away from the end plate (26), the push block (29) is located at the front stroke position and covers the feed port (28). When the push block (29) is reset to its rear stroke position, the push block (29) and the feed port (28) are misaligned.

7. The automatic feeding system for blow-molded plastic bottle preforms according to claim 1, characterized in that, The depth of the positioning groove (24) is greater than the width of the handle, and / or the width of the positioning groove (24) is adapted to the thickness of the handle.

8. The automatic feeding system for blow-molded plastic bottle preforms according to claim 5, characterized in that, The conveyor belt (17) has a frame (18) on both sides. An upright mounting block (21) is fixed on the frame (18) by fasteners. Two parallel upright baffles (19) are provided above the conveyor belt (17). The spacing between the baffles (19) is adapted to the length of the handle. A horizontally extending connecting rod (20) is fixed on the outer end face of the baffle (19). The outer end of the connecting rod (20) passes through the mounting block (21). The top of the mounting block (21) is threaded with a fastening screw (22). The inner end of the fastening screw (22) abuts against the connecting rod (20).

9. The automatic feeding system for blow-molded plastic bottle preforms according to claim 5, characterized in that, A rear stop (23) is placed on the conveyor belt (17). The rear stop (23) is an L-shaped metal plate. The upright end face of the rear stop (23) is used to contact the last handle.

10. The automatic feeding system for blow-molded plastic bottle preforms according to claim 1, characterized in that, The rotary unit is provided with a preform loading position, a heating device, a handle loading position and a blow molding station in sequence along the travel path of the slide table (2). The feeding unit is correspondingly set at the handle loading position, and the loading method includes the following steps: loading the preform onto the preform seat (4) on the slide table (2). Preheat the preform; The swing shaft (10) swings outward 90 degrees from the upright position to the horizontal position, and at the same time, the swing shaft (10) rotates 180 degrees. The gripper's clamp (13) moves downward and opens, gripping the upper side of the handle located at the feeding end. The swing shaft (10) swings upward 90 degrees from the horizontal position to the upright position, and at the same time, the swing shaft (10) rotates 180 degrees, so that the handle is located on the preform side. The workstation unit, equipped with a handle, enters the blow molding station to perform blow molding while maintaining a fixed relative position with the preform.

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