A bottle blowing device for the production of plastic packaging bottles

Abstract

The present invention discloses a bottle blowing device for the production of plastic packaging bottles, which relates to the technical field of plastic packaging bottle production. The bottle blowing device includes: an extrusion mechanism for extruding a parison; a blow molding module including a first mold and a second mold. When the first mold and the second mold are in the mold closing position, the extruded parison is located in the mold cavity formed between the first mold and the second mold; a mouth expanding assembly respectively arranged on the first mold and the second mold. The mouth expanding assembly includes a mouth expanding plate and a mouth expanding driving assembly, and the mouth expanding driving assembly is in transmission connection with the mouth expanding plate. When the blow molding module drives the parison to move from the mold closing position to the blow molding position, under the drive of the mouth expanding driving assembly, the mouth expanding plate extends into and abuts against the air inlet end position of the parison; a blowing assembly including a blowing driving assembly and a blowing pipe, and the blowing driving assembly is used to drive the blowing pipe to blow mold the parison in the mold cavity. This bottle blowing device can ensure that the blowing pipe smoothly enters the parison and guarantee the blow molding quality.

Description

Technical Field

[0001] The present invention belongs to the technical field of plastic packaging bottle production, and particularly relates to a bottle blowing device for plastic packaging bottle production. Background Art

[0002] A bottle blowing machine is a device used to form plastic bottles from plastic particles or preforms through processes such as heating and blowing. It can be used to process plastic bottles such as beverage bottles, edible oil bottles, cosmetic bottles, and medicine bottles for packaging and storing different items, facilitating the circulation and use of commodities.

[0003] When the existing bottle blowing device for plastic packaging bottle production is in use, the preform of the extruded plastic bottle is placed in a blow molding die, and compressed air is introduced into the preform through a blow pipe for blow molding processing. After cooling, the blow molding die is opened, and the excess part at the mouth of the packaging bottle is cut off by a cutter, and then the processed packaging bottle can be obtained.

[0004] However, in the actual production and processing process, during the process that the preform placed in the blow molding die is cut and then displaced with the die to the blow molding position, since the freshly extruded preform has a high temperature and a soft material, especially for small-diameter plastic packaging bottles, the edge of the preform cut is prone to collapse under the action of gravity, and even the cut position of the preform undergoes lateral fitting deformation, which is not conducive to the subsequent insertion of the blow pipe into the inner cavity of the preform. Summary of the Invention

[0005] The purpose of the present invention is to provide a bottle blowing device for plastic packaging bottle production with a simple structure and reasonable design to solve the above problems.

[0006] The present invention realizes the above purpose through the following technical solutions:

[0007] A bottle blowing device for plastic packaging bottle production, comprising:

[0008] An extrusion mechanism for extruding a preform;

[0009] A blow molding module, including a first die and a second die, which are correspondingly arranged. When the first die and the second die are in the mold closing position, the extruded preform is located in the mold cavity formed between the first die and the second die, and the air inlet end of the preform extends out of the mold cavity;

[0010] A mouth supporting component, which is respectively arranged on the first die and the second die. The mouth supporting component includes a mouth supporting plate and a mouth supporting driving component, and the mouth supporting driving component is in transmission connection with the mouth supporting plate. When the blow molding module drives the preform to move from the mold closing position to the blow molding position, under the drive of the mouth supporting driving component, the mouth supporting plate extends into and abuts against the air inlet end position of the preform. Among them, the mouth supporting direction of the paired mouth supporting plates for the preform is parallel to the mold closing direction of the first die and the second die;

[0011] A blow molding assembly, comprising a blowing drive assembly and a blowing pipe. When the parison is in the blow molding position, the blowing drive assembly is used to drive the blowing pipe to pass through the inlet end of the parison after the necking and blow mold the parison in the mold cavity.

[0012] As a further optimized solution of the present invention, the blow molding module further comprises a mold closing and shifting assembly and a blow molding shifting assembly. The output end of the blow molding shifting assembly is in transmission connection with a sliding seat, and a mold closing and shifting assembly is arranged on the sliding seat. The output ends of the mold closing and shifting assembly are respectively in transmission connection with a first mold and a second mold.

[0013] As a further optimized solution of the present invention, the mold closing and shifting assembly comprises a first motor, a swing arm, a first transition rod, a second transition rod and a sliding rod. The output end of the first motor is fixedly connected with the swing arm. The two ends of the swing arm are respectively rotatably connected with a first transition rod and a second transition rod. The end of the first transition rod far from the swing arm is rotatably connected with a push plate, and the push plate is fixedly connected with the sliding rod. One end of the first mold far from the second mold is fixedly connected with a first mold base, and the first mold base is fixedly connected to the end of the sliding rod far from the push plate. One end of the second mold far from the first mold is fixedly connected with a second mold base, and the sliding rod passes through the second mold base and is slidably connected with the second mold base. Among them, the first mold base and the second mold base are respectively slidably connected to the sliding seat;

[0014] The blow molding shifting assembly comprises a second motor, a lead screw and a base. The second motor is fixedly installed on the workbench through the base. The output end of the second motor is fixedly connected with the lead screw, and a sliding seat is threadedly connected to the lead screw. Among them, a guide rod is erected on the base, and the guide rod passes through the sliding seat and is slidably connected with the sliding seat.

[0015] As a further optimized solution of the present invention, the necking drive assembly comprises an upper layer plate, a lower layer plate, an upper rotating rod and a lower rotating rod. Lower layer plates are respectively fixedly arranged on the first mold and the second mold. An upper layer plate is arranged above the lower layer plate. A guide post is fixedly connected to the side of the upper layer plate facing the lower layer plate. The guide post passes through the lower layer plate and is slidably connected with the lower layer plate. A first spring is sleeved on the side of the guide post between the upper layer plate and the lower layer plate. Among them, a lower rotating rod is rotatably connected at the position of the relief arc opening of the lower layer plate. The outer end of the lower rotating rod is rotatably connected with an upper rotating rod, and the end of the upper rotating rod far from the lower rotating rod is rotatably connected with the upper layer plate. A necking plate is fixedly arranged on the side of the lower rotating rod adjacent to the upper rotating rod;

[0016] Among them, along the direction from the mold closing position to the blow molding position, a contact plate is fixedly connected to the front end of the upper layer plate, and a contact rail is arranged in front of the upper layer plate. The contact rail is fixedly arranged on the workbench through a fixing seat. When the blow molding module drives the parison to move to the blow molding position, the contact plate is in frictional contact with the contact rail.

[0017] As a further optimization solution of the present invention, mold end seats are respectively arranged at positions above the mold cavities adjacent to the first mold and at positions above the mold cavities adjacent to the second mold itself. The lower edge of the mold end seat has a flange portion. In the direction perpendicular to the mold closing direction, the maximum distance value between the flange portions of the mold end seats is less than the outer diameter dimension value of the preform.

[0018] As a further optimization solution of the present invention, an air delivery cylinder is connected to the air inlet end of the air blowing pipe. The outer diameter of the air delivery cylinder is larger than that of the air blowing pipe, and the end of the air delivery cylinder adjacent to the air blowing pipe has a pressing cone portion. When the air blowing pipe extends into the mold cavity, the conical surface of the pressing cone portion is in frictional contact with the inner wall of the conical groove of the mold end seat.

[0019] Wherein, a clamping groove is formed on one side of the pressing cone portion facing the mold opening direction. Clamping components are respectively arranged in the first mold and the second mold. The clamping blocks of the clamping components are arranged corresponding to the clamping grooves. When the preform moves from the mold closing position to the blow molding position, the clamping components drive the clamping blocks to abut in the clamping grooves.

[0020] As a further optimization solution of the present invention, the clamping component includes a wedge block, a guide rod and a second spring. Guide rods are respectively slidably connected in the first mold and the second mold. The outer ends of the guide rods are fixedly connected with corresponding clamping blocks, and the inner ends of the guide rods are fixedly connected with wedge blocks. A second spring is sleeved on the guide rod on one side of the wedge block. The wedge block is in driving contact with the corresponding guide post. Wherein, one end of the guide post located in the first mold and the second mold has an arc convex portion.

[0021] As a further optimization solution of the present invention, a cutting driving component is arranged on the workbench. The output end of the cutting driving component is in driving connection with a cutting knife. The cutting driving component is used to drive the cutting knife to cut the extruded preform. And in the vertical direction, the position of the cutting edge of the cutting knife is lower than the lower surface position of the lower layer plate.

[0022] As a further optimization solution of the present invention, in the direction from the mold closing position to the blow molding position, clamping plates are respectively fixedly connected to the front sides of the first mold base and the second mold base. And a blank supporting component is arranged in front of the clamping plates. The blank supporting component includes side baffle rods and a supporting plate. A bracket is fixedly arranged on one side of the workbench. The side baffle rods and the supporting plate are respectively fixedly connected to the bracket. The area between the side baffle rods and the supporting plate is the blank falling area.

[0023] As a further optimization solution of the present invention, the air blowing driving component includes a hydraulic cylinder and an air compressor. The hydraulic cylinder is arranged on the fixed seat. The output end of the hydraulic cylinder is fixedly connected with a mounting seat. The air delivery cylinder is mounted on the mounting seat. The air inlet end of the air delivery cylinder is communicated with the output end of the air compressor.

[0024] The present invention has at least the following beneficial effects: The blow molding device for producing plastic packaging bottles provided by the present invention is provided with an extrusion mechanism, a blow molding module, a mouth support component and a blow molding component. The parison is displaced from the mold closing position to the blow molding position by the blow molding module. With the abutting transmission of the abutting plate and the abutting rail in the mouth support component, the pair of mouth support plates are swung to the air inlet end of the parison, and the opening of the air inlet end of the parison is opened, effectively preventing the problem of blockage of the air inlet end caused by the soft texture of the parison exposed outside from collapsing or even stacking, which helps the subsequent blow pipe to smoothly enter the inner cavity of the parison for blow molding operation;

[0025] Moreover, by the downward movement of the upper plate, the transmission block is engaged with the card slot, increasing the contact area between the parison and the extrusion cone part, and with the auxiliary support of the mouth support plate for the air inlet end of the parison, it is ensured that the air inlet end of the parison is evenly extruded in the extrusion cone part and the tapered groove of the mold end seat, with good sealing performance. In addition, when the plastic bottle is demolded, the plastic bottle is suspended on the air delivery cylinder through the engagement of the parison in the card slot, and the demolding is smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is the overall structural schematic diagram of the present invention;

[0027] Figure 2 is the Figure 1 front structural schematic diagram of the present invention;

[0028] Figure 3 is the side structural schematic diagram of the extrusion mechanism and the blow molding module of the present invention;

[0029] Figure 4 is the partial structural schematic diagram of the blow molding module and the mouth support component of the present invention;

[0030] Figure 5 is the Figure 4 enlarged view at A in the present invention;

[0031] Figure 6 is the side partial cross-sectional structural schematic of the blow molding module and the mouth support component of the present invention Figure 1 ;

[0032] Figure 7 is the side partial cross-sectional structural schematic of the blow molding module and the mouth support component of the present invention Figure 2 ;

[0033] Figure 8 is the structural schematic diagram of the mold closing and displacement component, the first mold and the second mold of the present invention;

[0034] Figure 9 is the structural schematic diagram of the blow molding component of the present invention;

[0035] Figure 10 is theFigure 9 Enlarged view at position B in the figure;

[0036] Figure 11 It is a schematic cross-sectional structure of the side part of the blow molding module and the necking component of the present invention; Figure 3 ;

[0037] Figure 12 It is the present invention Figure 11 Enlarged view at position C in the figure.

[0038] In the figure: 1. Extrusion mechanism; 11. Die; 12. Heating component; 13. Feeding cylinder; 14. Cutting knife; 15. Cutting drive component; 16. Parison; 2. Necking component; 21. Contact rail; 22. Contact plate; 23. Upper plate; 24. First spring; 25. Guide post; 26. Lower plate; 27. Upper rotating rod; 28. Necking plate; 29. Lower rotating rod; 210. Wedge block; 211. Second spring; 212. Guide rod; 213. Block; 3. Blow molding module; 31. Second motor; 32. Lead screw; 33. Slide seat; 34. Base; 35. Swing arm; 36. First transition rod; 37. Push plate; 38. Slide bar; 39. First mold base; 310. First mold; 311. Second mold; 312. Second mold base; 313. Second transition rod; 314. First motor; 315. Clamping plate; 301. Mold end seat; 4. Blow molding component; 41. Air compressor; 42. Fixed seat; 421. Through hole; 43. Hydraulic cylinder; 44. Air delivery cylinder; 45. Air delivery pipe; 46. Blow pipe; 47. Extrusion cone part; 471. Card slot; 48. Mounting seat; 5. Material supporting component; 51. Side stop bar; 52. Bracket; 53. Support plate; 54. Workbench. Detailed implementation manners

[0039] The following further describes the present application in detail with reference to the accompanying drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0040] As Figure 1 、 Figure 2 and Figure 3 shown, a blow molding device for producing plastic packaging bottles provided by the present invention includes:

[0041] Extrusion mechanism 1, and the extrusion mechanism 1 is used to extrude parison 16;

[0042] The blow molding module 3 includes a first mold 310 and a second mold 311, wherein the first mold 310 and the second mold 311 are arranged correspondingly, and when the first mold 310 and the second mold 311 are located at the mold closing position, the extruded parison 16 is located in the mold cavity formed between the first mold 310 and the second mold 311, and the air inlet end of the parison 16 extends out of the mold cavity;

[0043] The support assembly 2 is respectively arranged on the first mold 310 and the second mold 311, and the support assembly 2 includes a support plate 28 and a support drive assembly. The support drive assembly is in transmission connection with the support plate 28. When the blow molding module 3 drives the parison 16 to move from the mold closing position to the blow molding position, the support plate 28 is driven by the support drive assembly to extend into and abut against the air inlet end position of the parison 16, wherein the support direction of the parison 16 of the pair of support plates 28 is parallel to the mold closing direction of the first mold 310 and the second mold 311;

[0044] The blow molding assembly 4 includes a blow drive assembly and a blow pipe 46. When the preform 16 is located at the blow molding position, the blow drive assembly is used to drive the blow pipe 46 to pass through the air inlet end of the preform 16 behind the support opening and blow the preform 16 in the mold cavity.

[0045] In the above embodiment, the plastic parison 16 formed by extrusion of the extrusion mechanism 1 is a hollow cylindrical structure, and the first mold 310 and the second mold 311 are at the initial position, that is, the mold opening position. Figure 6 The positions of the first mold 310 and the second mold 311 are shown in FIG. 1 . After the first mold 310 and the second mold 311 are closed, the cut parison 16 is clamped in the mold cavity of the mold. When the first mold 310 and the second mold 311 in the closed state drive the parison 16 to move from the closed position to the blow molding position, as shown in FIG. Figure 2 As shown, when the lower position of the mouth mold 11 is shifted to the lower position of the blowing pipe 46, the supporting plates 28 arranged in pairs extend into and abut against the air inlet end position of the preform 16, thereby supporting the air inlet end of the plastic preform 16 and effectively preventing the preform 16 that has just been cut from collapsing and stacking due to its soft texture. In addition, since it is necessary to keep the preform 16 in a vertical state in the mold cavity, it is necessary to clamp the upper end position of the preform 16, so that the diameter of the air inlet port of the preform 16 is contracted, especially in the clamping direction, the edges of the air inlet port diameter are close to each other. The supporting direction of the preform 16 by the supporting plates 28 arranged in pairs in this embodiment is parallel to the closing direction of the first mold 310 and the second mold 311, so that the air inlet end edges of the preform 16 that are close to each other are specifically stretched to expand the distance between them, as shown in FIG. Figure 3 As shown, the left and right clamping direction of the first mold 310 and the second mold 311 is the mold closing direction.

[0046] It should be noted that if Figure 3As shown, the extrusion mechanism 1 includes a die 11, a heating assembly 12, and a feed cylinder 13. The feed cylinder 13 is mounted on the workbench 54. A heating assembly 12 for melting and heating the plastic material in the feed cylinder 13 is provided on the feed cylinder 13. The output end of the feed cylinder 13 is provided with a die 11. The plastic pellet raw material is heated and conveyed in the feed cylinder 13, and a parison 16 of a hollow cylindrical structure is extruded by the die 11 and droops between the first mold 310 and the second mold 311 under the action of gravity.

[0047] Exemplarily, continue to refer to Figure 2 、 Figure 3 and Figure 8 , the blow molding module 3 further includes a mold clamping displacement assembly and a blow molding displacement assembly. The output end of the blow molding displacement assembly is drivingly connected to the slide seat 33. A mold clamping displacement assembly is provided on the slide seat 33. The output ends of the mold clamping displacement assembly are respectively drivingly connected to the first mold 310 and the second mold 311. The blow molding displacement assembly is used to drive the mold clamping displacement assembly to perform a linear displacement between the mold clamping position and the blow molding position through the slide seat 33, while the mold clamping displacement assembly is used to adjust the open mold and closed mold states between the first mold 310 and the second mold 311.

[0048] Continue to refer to Figure 8 , the mold clamping displacement assembly includes a first motor 314, a swing arm 35, a first transition rod 36, a second transition rod 313, and a slide rod 38. The output end of the first motor 314 is fixedly connected to the swing arm 35. The two ends of the swing arm 35 are respectively rotatably connected to the first transition rod 36 and the second transition rod 313. The end of the first transition rod 36 away from the swing arm 35 is rotatably connected to a push plate 37. The push plate 37 is fixedly connected to the slide rod 38. One end of the first mold 310 away from the second mold 311 is fixedly connected to a first mold base 39. The first mold base 39 is fixedly connected to the end of the slide rod 38 away from the push plate 37. One end of the second mold 311 away from the first mold 310 is fixedly connected to a second mold base 312. The slide rod 38 passes through the second mold base 312 and is slidably connected to the second mold base 312. Among them, the first mold base 39 and the second mold base 312 are respectively slidably connected to the slide seat 33;

[0049] Continue to refer to Figure 2 and Figure 3 , the blow molding displacement assembly includes a second motor 31, a lead screw 32, and a base 34. The second motor 31 is fixedly installed on the workbench 54 through the base 34. The output end of the second motor 31 is fixedly connected to the lead screw 32. The slide seat 33 is threadedly connected to the lead screw 32. Among them, a guide rod is mounted on the base 34. The guide rod passes through the slide seat 33 and is slidably connected to the slide seat 33.

[0050] In the above embodiment, taking Figure 8For example, at this time, the first mold 310 and the second mold 311 are in the open mold state. The swing arm 35 is driven by the first motor 314 to rotate, the second mold base 312 is driven to move by the second transition rod 313, and the first mold base 39 is driven to move by the first transition rod 36, the push plate 37 and the slide rod 38, so as to realize the first mold 310 and the second mold 311 moving towards each other to the mold closing position; then, with the help of the second motor 31 driving the lead screw 32, the slide seat 33 drives the first mold 310 and the second mold 311 in the mold closing state to shift from the mold closing position to the blow molding position. After the blow molding is completed, the first motor 314 is started for reverse driving, so that the first mold 310 and the second mold 311 move away from each other to open the mold, and then the second motor 31 is started to prompt the slide seat 33 to drive the opened first mold 310 and the second mold 311 to shift to the initial position.

[0051] Continue to refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 ,The mouth expanding driving assembly includes an upper layer plate 23, a lower layer plate 26, an upper rotating rod 27 and a lower rotating rod 29. The lower layer plates 26 are respectively and fixedly arranged on the first mold 310 and the second mold 311. An upper layer plate 23 is arranged above the lower layer plate 26. A guide post 25 is fixedly connected to one side of the upper layer plate 23 facing the lower layer plate 26. The guide post 25 penetrates through the lower layer plate 26 and is slidably connected to the lower layer plate 26. A first spring 24 is sleeved on the side of the guide post 25 between the upper layer plate 23 and the lower layer plate 26. Among them, a lower rotating rod 29 is rotatably connected at the position of the relief arc opening of the lower layer plate 26. The outer end of the lower rotating rod 29 is rotatably connected to an upper rotating rod 27. One end of the upper rotating rod 27 far from the lower rotating rod 29 is rotatably connected to the upper layer plate 23. A mouth expanding plate 28 is fixedly arranged on the side of the lower rotating rod 29 adjacent to the upper rotating rod 27;

[0052] Among them, along the direction from the mold closing position to the blow molding position, a contact plate 22 is fixedly connected to the front end of the upper layer plate 23, and a contact rail 21 is arranged in front of the upper layer plate 23. The contact rail 21 is fixedly arranged on the workbench 54 through a fixing seat 42. When the blow molding module 3 drives the preform 16 to move to the blow molding position, the contact plate 22 is in frictional contact with the contact rail 21.

[0053] In the above embodiment, after the first mold 310 and the second mold 311 clamp the extruded preform 16 in the mold cavity, under the transmission of the lead screw 32 to the slide seat 33, the slide seat 33 moves to the right (taking Figure 2 the orientation shown as an example), so that the contact plate 22 abuts against the inclined surface of the contact rail 21, thereby causing the upper layer plate 23 to move downward. Taking the mouth expanding driving assembly on the left shown in Figure 6 and Figure 7 as an example, the upper rotating rod 27 pushes the lower rotating rod 29 to make the lower rotating rod 29 swing clockwise. As shown in Figure 7As shown, the paired mouth-opening plates 28 swing symmetrically to the mouth-opening position, reopening the edges of the parison 16 that are close to each other due to the clamping of the two molds, increasing the left-right spacing, and using the mouth-opening plates 28 to assist in supporting the structure of the intake end edge of the parison 16, effectively preventing the soft texture of the heated parison 16 from collapsing and stacking inward, blocking the intake end of the parison 16, fully ensuring that the subsequent blow pipe 46 can smoothly extend into the parison 16 in the mold cavity, and ensuring the blow molding quality;

[0054] It should be noted that during the blow molding process, the abutting plate 22 always frictionally abuts against the abutting rail 21. After the blow molding is completed, the first mold 310 and the second mold 311 move away from each other, causing the abutting plate 22 to move synchronously with its respective mold. When the abutting plate 22 moves outside the abutting rail 21, that is, the abutting plate 22 and the abutting rail 21 are disengaged, the upper layer plate 23 moves upward under the elastic force of the first spring 24, causing the mouth-opening plate 28 to move in the reverse direction to the initial position, so that the blow-molded packaging bottle structure is demolded from the mold.

[0055] It should be noted that since the intake end of the parison 16 exposed outside the mold cavity is not directly cooled by the cooling component in the mold, the part of the parison 16 outside the mold cavity will cool slower than the part of the parison 16 inside the mold cavity, so there is a situation where the part of the parison 16 outside the mold cavity is softer than the part of the parison 16 inside the mold cavity. However, the parison 16 located outside will not be soft enough to be stretched arbitrarily. Therefore, during the mold opening process, the mouth-opening plate 28 will squeeze past the edge part of the intake port of the parison 16, without causing obstruction of the parison 16 to the mouth-opening plate 28 and stretching deformation of the mouth-opening plate 28 to the parison 16.

[0056] It should be noted that continue to refer to Figure 3 , a cutting drive assembly 15 is provided on the workbench 54. The output end of the cutting drive assembly 15 is drivingly connected to a cutting knife 14. The cutting drive assembly 15 is used to drive the cutting knife 14 to cut the extruded parison 16, and in the vertical direction, the blade position of the cutting knife 14 is lower than the lower surface position of the lower layer plate 26. Exemplarily, the cutting drive assembly 15 is a hydraulic telescopic member, an electric telescopic member, an electrical telescopic member, etc., which is not limited here. After the parison 16 is extruded and the first mold 310 and the second mold 311 are closed, the cutting drive assembly 15 drives the cutting knife 14 to move left (taking Figure 3 the shown orientation as an example), and the cutting knife 14 cuts the parison 16 under the lower layer plate 26, on the one hand, reducing the amount of the parison 16 exposed outside, and on the other hand, facilitating the mouth-opening operation of the mouth-opening plate 28.

[0057] Exemplarily, continue to refer to Figure 6, mold end seats 301 are respectively provided at positions above the first mold 310 near the mold cavity and above the second mold 311 near its own mold cavity. Among them, the mold cavity is a groove opened in the mold for forming the packaging bottle body structure. The lower edge of the mold end seat 301 has a flange portion. In the direction perpendicular to the mold closing direction, the maximum distance value between the flange portions of the mold end seats 301 is smaller than the outer diameter dimension value of the preform 16. When the molds are closed, by fitting the two mold end seats 301 together, the flange portions at the lower edges of the mold end seats 301 clamp and extrude the preform 16, so that the preform 16 in the mold cavity remains vertical under the action of gravity. And the maximum distance value between the flange portions of the mold end seats 301 is smaller than the outer diameter dimension value of the preform 16, so that the mold end seats 301 only clamp the left and right sides of the preform 16 (taking the Figure 2 shown orientation as an example), and the front and back sides are not restricted by extrusion and clamping, avoiding excessive wrinkling at the air inlet end caused by the preform 16 being entirely extruded and clamped circumferentially, which affects the subsequent sealing and abutting effect of the air delivery cylinder 44 against the air inlet end of the preform 16.

[0058] Exemplarily, continue to refer to Figure 9 , Figure 10 and Figure 11 . The air inlet end of the blow pipe 46 is connected to an air delivery cylinder 44. The outer diameter of the air delivery cylinder 44 is larger than the outer diameter of the blow pipe 46, and the air delivery cylinder 44 has an extrusion cone portion 47 at one end adjacent to the blow pipe 46. When the air inlet end of the preform 16 (i.e., the part of the preform 16 located in the cone groove of the mold end seat 301) clamped by the mold and shifted to the blow molding position is supported by the edge by the mouth support plate 28, the blow pipe 46 smoothly passes through the air inlet end and extends into the mold cavity, and the extrusion cone portion 47 of the air delivery cylinder 44 also smoothly reaches the position near the mold cavity at the air inlet end of the preform 16, as Figure 11 shown. When the blow pipe 46 smoothly extends into the mold cavity, the conical surface of the extrusion cone portion 47 frictionally abuts against the inner wall of the cone groove of the mold end seat 301. Thus, by means of the abutment between the conical surface of the extrusion cone portion 47 and the inner wall of the cone groove of the mold end seat 301, the part of the air inlet end of the preform 16 located outside is sealed and abutted. Moreover, with the auxiliary support of the above-mentioned mouth support plate 28, it is prevented that the air inlet end of the preform 16 collapses, avoiding the situation where there are wrinkling gaps when the part of the preform 16 between the conical surface of the extrusion cone portion 47 and the inner wall of the cone groove of the mold end seat 301 is stacked and wrinkled and then extruded, especially when the thickness of the plastic preform is relatively large, the extrusion gaps generated by the extrusion of the stacked and wrinkled part are more serious, ensuring that sufficient pressure is continuously provided to the inner cavity of the preform 16 during the blow molding process and ensuring the blow molding effect, as Figure 11 shown. The contour structure shape indicated by the thick black line is the structure contour formed after the preform 16 located in the mold cavity is blow molded, which is the structure part of the subsequent plastic bottle to be retained, including the bottle mouth and the bottle body, and its structure is determined by the shape of the mold cavities of the first mold 310 and the second mold 311;

[0059] Among them, continuing to refer to Figure 10 、 Figure 11 and Figure 12 , a clamping groove 471 is formed on one side of the extrusion cone portion 47 facing the mold opening direction. Clamping components are respectively arranged in the first mold 310 and the second mold 311. The clamping blocks 213 of the clamping components are correspondingly arranged with the clamping groove 471. When the preform 16 moves from the mold closing position to the blow molding position, the clamping components drive the clamping blocks 213 to abut in the clamping groove 471.

[0060] Exemplarily, as shown in Figure 11 and Figure 12 , the clamping component includes a wedge block 210, a guide rod 212 and a second spring 211. Guide rods 212 are respectively slidably connected in the first mold 310 and the second mold 311. The outer ends of the guide rods 212 are fixedly connected with corresponding clamping blocks 213. The inner ends of the guide rods 212 are fixedly connected with wedge blocks 210. A second spring 211 is sleeved on the guide rod 212 on one side of the wedge block 210. The wedge block 210 is in transmission abutment with the corresponding guide post 25. Among them, one end of the guide post 25 located in the first mold 310 and the second mold 311 both has an arc convex portion.

[0061] In the above embodiment, when the upper layer plate 23 moves downward, the arc convex portion of the guide post 25 presses the wedge block 210, so that the guide rod 212 drives the clamping block 213 to protrude outside the mold end seat 301. When the preform 16 is displaced to the blow molding position, the air delivery cylinder 44 moves downward until the clamping block 213 is clamped with the clamping groove 471, so as to clamp the preform 16 located outside between the clamping block 213 and the clamping groove 471, increase the contact area between the preform 16 and the extrusion cone portion 47 of the air delivery cylinder 44, improve the sealing performance between the preform 16 and the air delivery cylinder 44, ensure the blowing effect, and further ensure the blow molding quality, reduce the product defects caused by air leakage. Moreover, after the blow molding is completed, when the first mold 310 and the second mold 311 are opened, the clamping block 213 withdraws from the clamping groove 471. At this time, with the help of the exposed part of the preform 16 (i.e., the redundant part of the preform 16 in the cone groove of the mold end seat 301) being clamped outside the extrusion cone portion 47, the packaging bottle product formed by blow molding is better suspended on the air delivery cylinder 44, which helps the plastic packaging bottle product to be smoothly demolded.

[0062] It should be noted that, continuing to refer to Figure 2 , along the direction from the mold closing position to the blow molding position, clamping plates 315 are respectively fixedly connected to the front sides of the first mold base 39 and the second mold base 312. And a blank supporting component 5 is arranged in front of the clamping plates 315. The blank supporting component 5 includes side retaining rods 51 and a supporting plate 53. A bracket 52 is fixedly arranged on one side of the workbench 54. The side retaining rods 51 and the supporting plate 53 are respectively fixedly connected to the bracket 52. The area between the side retaining plate and the supporting plate 53 is the blank falling area.

[0063] Thus, after demolding, when the first mold 310 and the second mold 311 are moved leftward to the initial position and clamp and close the mold again for a new parison 16, the originally blow-molded packaging bottle product is clamped by the clamping plate 315. Then, driven by the hydraulic cylinder 43, the air delivery cylinder 44 drives the blow pipe 46 to move upward, so that the extrusion cone part 47 of the air delivery cylinder 44 is separated from the redundant part at the air inlet end of the packaging bottle product. During the process of the new parison 16 moving rightward, the originally blow-molded packaging bottle product is conveyed and shifted to the blanking area on the right side, facilitating the subsequent removal of the packaging bottle product by means of a robotic arm.

[0064] It should be noted that for the blow-molded plastic packaging bottle, after the robotic arm removes the packaging bottle, the upper part of the bottle mouth, that is, the parison part in the conical groove corresponding to the mold end seat 301, and the protruding part of the bottle bottom due to the mold clamping will be cut off by the correspondingly arranged cutting device respectively, so as to retain the bottle body structure of the packaging bottle, which will not be elaborated here.

[0065] It should be noted that as Figure 9 shown, the air blowing drive assembly includes a hydraulic cylinder 43 and an air compressor 41. The hydraulic cylinder 43 is arranged on the fixed seat 42. The output end of the hydraulic cylinder 43 is fixedly connected with a mounting seat 48. An air delivery cylinder 44 is mounted on the mounting seat 48. The air inlet end of the air delivery cylinder 44 is communicated with the output end of the air compressor 41. Thus, the hydraulic cylinder 43 drives the mounting seat 48 to drive the air delivery cylinder 44 to move up and down, so as to realize the blow pipe 46 extending into or out of the air inlet end of the parison 16. When the blow pipe 46 extends into the mold cavity through the air inlet end of the parison 16, the air compressor 41 is used to deliver air through the air delivery cylinder 44 to the blow pipe 46 for blow molding operation, as Figure 9 shown, a through hole 421 is opened on the fixed seat 42, so that when the air delivery cylinder 44 drives the blow pipe 46 to move through the through hole 421 to the lower part of the fixed seat 42.

[0066] It should be noted that for this blow molding equipment for producing plastic packaging bottles, during use, the parison 16 is extruded by the extrusion mechanism 1. Under the action of gravity, the hollow cylindrical parison 16 is located between the first mold 310 and the second mold 311. Driven by the first motor 314, the first mold base 39 and the second mold base 312 slide towards each other, realizing the first mold 310 and the second mold 311 moving towards each other to close the mold, and the flange part of the mold end seat 301 is used to laterally clamp the air inlet end of the parison 16. At this time, the cutting drive assembly 15 is started to drive the cutting knife 14 to cut the parison 16;

[0067] Then, start the second motor 31 to move the slide 33 to the right to the blow molding position. During the movement, the contact between the contact plate 22 and the contact rail 21 causes the lower layer plate 26 to move downward, so that the upper rotating rod 27 drives the lower rotating rod 29 to rotate, causing the pair of mouth-opening plates 28 to swing into the inner edge of the air inlet end of the preform 16 to perform mouth-opening and auxiliary support on the air inlet end of the preform 16, effectively preventing the part of the preform 16 exposed in the tapered groove of the mold end seat 301 from collapsing and stacking due to its soft texture, and avoiding blockage of the air inlet end of the preform 16;

[0068] Next, the hydraulic cylinder 43 is started to drive the mounting seat 48 to drive the air delivery cylinder 44, so that the blow pipe 46 extends into the blow molding cavity of the preform 16, and the extrusion cone part 47 abuts against the inner wall of the tapered groove of the mold end seat 301. Thus, the air compressor 41 supplies air to the blow pipe 46 through the air delivery pipe 45 and the air delivery cylinder 44 in sequence to realize blow molding. Moreover, when the upper layer plate 23 moves downward, the clamping block 213 protrudes outside the mold end seat 301. When the extrusion cone part 47 moves downward, the clamping block 213 is clamped with the card slot 471, increasing the contact area between the preform 16 and the extrusion cone part 47;

[0069] After the blow molding is completed, first start the first motor 314 to move the first mold 310 and the second mold 311 away from each other to open the mold. During the mold opening process, the mouth-opening plate 28 passes over the edge of the exposed preform 16 and is in large-area contact with the preform 16 through the card slot 471, which helps the plastic packaging bottle to hang on the air delivery cylinder 44 during the demolding process. When the upper layer plate 23 moves outside the contact rail 21, the upper layer plate 23 moves upward to reset the mouth-opening plate 28 to the initial position. When the slide 33 moves to the left to the mold closing position and the first mold 310 and the second mold 311 clamp and close the preform 16 again, the clamping plate 315 clamps the blow-molded packaging bottle. At this time, the air delivery cylinder 44 moves upward to withdraw the blow pipe 46 outside the packaging bottle. During the process of the slide 33 moving to the right to the blow molding position, the clamping plate 315 conveys the blow-molded packaging bottle to the blanking area;

[0070] It should be noted that for the plastic bottles transported to the blanking area, the part of the preform originally located in the tapered groove of the mold end seat 301 remains at the bottle mouth position, and the protruding part generated by the clamping of the preform 16 by the first mold 310 and the second mold 311 remains at the bottle bottom position. Both will be cut off by the cutting device, and the finally remaining part is used as the packaging bottle structure.

[0071] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A bottle blowing device for plastic packaging bottle production, characterized in that, Comprising: An extrusion mechanism (1) for extruding a parison (16); A blow molding module (3) including a first mold (310) and a second mold (311), the first mold (310) and the second mold (311) being arranged correspondingly. When the first mold (310) and the second mold (311) are in the mold closing position, the extruded parison (16) is located in the mold cavity formed between the first mold (310) and the second mold (311), and the air inlet end of the parison (16) extends out of the mold cavity; A necking component (2) respectively arranged on the first mold (310) and the second mold (311), the necking component (2) including a necking plate (28) and a necking driving component, the necking driving component being in transmission connection with the necking plate (28). When the blow molding module (3) drives the parison (16) to move from the mold closing position to the blow molding position, under the drive of the necking driving component, the necking plate (28) extends into and abuts against the air inlet end position of the parison (16). Among them, the necking direction of the paired necking plates (28) for the parison (16) is parallel to the mold closing direction of the first mold (310) and the second mold (311); A blow molding component (4) including a blowing driving component and a blow pipe (46). When the parison (16) is in the blow molding position, the blowing driving component is used to drive the blow pipe (46) to pass through the air inlet end of the necked parison (16) and blow mold the parison (16) in the mold cavity; The necking driving component includes an upper layer plate (23), a lower layer plate (26), an upper rotating rod (27) and a lower rotating rod (29). The lower layer plates (26) are respectively fixedly arranged on the first mold (310) and the second mold (311). An upper layer plate (23) is arranged above the lower layer plate (26). A guide post (25) is fixedly connected to one side of the upper layer plate (23) facing the lower layer plate (26). The guide post (25) penetrates through the lower layer plate (26) and is slidably connected with the lower layer plate (26). A first spring (24) is sleeved on the side of the guide post (25) between the upper layer plate (23) and the lower layer plate (26). Among them, a lower rotating rod (29) is rotatably connected at the position of the relief arc opening of the lower layer plate (26). The outer end of the lower rotating rod (29) is rotatably connected with an upper rotating rod (27). One end of the upper rotating rod (27) far from the lower rotating rod (29) is rotatably connected with the upper layer plate (23). A necking plate (28) is fixedly arranged on the side of the lower rotating rod (29) adjacent to the upper rotating rod (27); Among them, along the direction from the mold closing position to the blow molding position, a contact plate (22) is fixedly connected to the front end of the upper layer plate (23), and a contact rail (21) is arranged in front of the upper layer plate (23). The contact rail (21) is fixedly arranged on the workbench (54) through a fixing seat (42). When the blow molding module (3) drives the parison (16) to move to the blow molding position, the contact plate (22) is in frictional contact with the contact rail (21).

2. The blow molding equipment for producing plastic packaging bottles according to claim 1, characterized in that, The blow molding module (3) further includes a mold clamping displacement component and a blow molding displacement component. The output end of the blow molding displacement component is drivingly connected to the slide base (33). A mold clamping displacement component is arranged on the slide base (33), and the output ends of the mold clamping displacement component are respectively drivingly connected to the first mold (310) and the second mold (311).

3. The blow molding equipment for producing plastic packaging bottles according to claim 2, characterized in that, The mold clamping displacement component includes a first motor (314), a swing arm (35), a first transition rod (36), a second transition rod (313), and a slide rod (38). The output end of the first motor (314) is fixedly connected to the swing arm (35). The two ends of the swing arm (35) are respectively rotatably connected to the first transition rod (36) and the second transition rod (313). The end of the first transition rod (36) away from the swing arm (35) is rotatably connected to a push plate (37). The push plate (37) is fixedly connected to the slide rod (38). One end of the first mold (310) away from the second mold (311) is fixedly connected to a first mold base (39). The first mold base (39) is fixedly connected to the end of the slide rod (38) away from the push plate (37). One end of the second mold (311) away from the first mold (310) is fixedly connected to a second mold base (312). The slide rod (38) penetrates through the second mold base (312) and is slidably connected to the second mold base (312). Among them, the first mold base (39) and the second mold base (312) are respectively slidably connected to the slide base (33); The blow molding displacement component includes a second motor (31), a lead screw (32), and a base (34). The second motor (31) is fixedly installed on the workbench (54) through the base (34). The output end of the second motor (31) is fixedly connected to the lead screw (32). The slide base (33) is threadedly connected to the lead screw (32). Among them, a guide rod is erected on the base (34). The guide rod penetrates through the slide base (33) and is slidably connected to the slide base (33).

4. A bottle blowing device for producing plastic packaging bottles according to claim 3, characterized in that, Mold end seats (301) are respectively arranged at positions above the first mold (310) near the mold cavity and above the second mold (311) near its own mold cavity. The lower edge of the mold end seat (301) has a flange portion. In the direction perpendicular to the mold clamping direction, the maximum distance value between the flange portions of the mold end seats (301) is smaller than the outer diameter dimension value of the parison (16).

5. The blow molding equipment for producing plastic packaging bottles according to claim 4, characterized in that, The air inlet end of the blow pipe (46) is connected to an air delivery cylinder (44). The outer diameter of the air delivery cylinder (44) is larger than the outer diameter of the blow pipe (46). And one end of the air delivery cylinder (44) adjacent to the blow pipe (46) has an extrusion cone portion (47). When the blow pipe (46) extends into the mold cavity, the conical surface of the extrusion cone portion (47) is in frictional contact with the inner wall of the conical groove of the mold end seat (301); Wherein, a clamping groove (471) is formed on one side of the extrusion cone part (47) facing the mold opening direction. Clamping components are respectively arranged in the first mold (310) and the second mold (311). The clamping blocks (213) of the clamping components are arranged corresponding to the clamping groove (471). When the preform (16) moves from the mold closing position to the blow molding position, the clamping components drive the clamping blocks (213) to abut in the clamping groove (471).

6. The blow molding equipment for producing plastic packaging bottles according to claim 5, characterized in that, The clamping component includes a wedge block (210), a guide rod (212) and a second spring (211). Guide rods (212) are respectively and slidably connected in the first mold (310) and the second mold (311). The outer ends of the guide rods (212) are fixedly connected with corresponding clamping blocks (213). The inner ends of the guide rods (212) are fixedly connected with the wedge block (210). The second spring (211) is sleeved on the guide rod (212) on one side of the wedge block (210). The wedge block (210) is in driving abutment with the corresponding guide post (25). Wherein, one end of the guide post (25) in the first mold (310) and the second mold (311) has an arc convex part.

7. The blow molding device for producing plastic packaging bottles according to claim 6, characterized in that, A cutting driving component (15) is arranged on the workbench (54). The output end of the cutting driving component (15) is in driving connection with a cutting knife (14). The cutting driving component (15) is used to drive the cutting knife (14) to cut the extruded preform (16). And in the vertical direction, the position of the cutting edge of the cutting knife (14) is lower than the lower surface position of the lower layer plate (26).

8. The blow molding equipment for producing plastic packaging bottles according to claim 7, wherein, In the direction from the mold closing position to the blow molding position, clamping plates (315) are respectively and fixedly connected to the front sides of the first mold base (39) and the second mold base (312). And a blank supporting component (5) is arranged in front of the clamping plates (315). The blank supporting component (5) includes side baffle rods (51) and a supporting plate (53). A bracket (52) is fixedly arranged on one side of the workbench (54). The side baffle rods (51) and the supporting plate (53) are respectively and fixedly connected to the bracket (52). The area between the side baffle rods (51) and the supporting plate (53) is the blank falling area.

9. The blow molding device for producing plastic packaging bottles according to claim 8, characterized in that, The air blowing driving component includes a hydraulic cylinder (43) and an air compressor (41). The hydraulic cylinder (43) is arranged on a fixed seat (42). The output end of the hydraulic cylinder (43) is fixedly connected with a mounting seat (48). An air delivery cylinder (44) is mounted on the mounting seat (48). The air inlet end of the air delivery cylinder (44) is communicated with the output end of the air compressor (41).

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