Bottle blowing equipment for plastic packaging bottle production

Abstract

The invention discloses bottle blowing equipment for plastic packaging bottle production, and relates to the technical field of plastic packaging bottle production, the bottle blowing equipment comprises: an extrusion mechanism for extruding a parison; the blow molding module comprises a first mold and a second mold, and when the first mold and the second mold are located at the mold closing position, an extruded parison is located in a mold cavity formed between the first mold and the second mold; the opening supporting assemblies are arranged on the first mold and the second mold correspondingly, each opening supporting assembly comprises an opening supporting plate and an opening supporting driving assembly, the opening supporting driving assemblies are in transmission connection with the opening supporting plates, and when the blow molding module drives the parison to move to the blow molding position from the mold closing position, the opening supporting plates stretch into and abut against the air inlet end of the parison under driving of the opening supporting driving assemblies; the blow molding assembly comprises an air blowing driving assembly and an air blowing pipe, and the air blowing driving assembly is used for driving the air blowing pipe to conduct blow molding on the parison in the mold cavity; the bottle blowing equipment can ensure that the air blowing pipe smoothly enters a parison, and the blow molding quality is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic packaging bottle production, and in particular relates to bottle blowing equipment for plastic packaging bottle production. Background Art

[0002] A bottle blowing machine is a device used to make plastic bottles from plastic granules or preforms through heating and blow molding. It can be used to process plastic bottles such as beverage bottles, edible oil bottles, cosmetic bottles, and medicine bottles to package and store different items, facilitating the circulation of goods.

[0003] When the existing blow molding equipment for producing plastic packaging bottles is used, the extruded plastic bottle parison is placed in a blow molding mold, and compressed air is introduced into the parison through a blow pipe for blow molding. After cooling, the blow molding mold is opened, and the excess part of the bottle mouth of the packaging bottle is cut off by a cutter to obtain a processed packaging bottle.

[0004] However, in the actual production process, after the parison placed in the blow molding mold is cut and moved to the blowing position with the mold, due to the high temperature and soft material of the newly extruded parison, especially for small-diameter plastic packaging bottles, the edge of the parison cut is easy to collapse under the action of gravity, and even cause lateral fitting deformation at the parison cut position, which is not conducive to the subsequent insertion of the blow tube into the inner cavity of the parison. Summary of the invention

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

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

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

[0008] An extrusion mechanism, the extrusion mechanism is used to extrude the parison;

[0009] A blow molding module, comprising a first mold and a second mold, wherein the first mold and the second mold are arranged correspondingly, and when the first mold and the second mold are located at a mold closing position, the extruded parison is located in a mold cavity formed between the first mold and the second mold, and an air inlet end of the parison extends out of the mold cavity;

[0010] A mouth support assembly is respectively arranged on the first mold and the second mold, and the mouth support assembly includes a mouth support plate and a mouth support drive assembly. The mouth support drive assembly is in driving connection with the mouth support plate. When the blow molding mold group drives the parison to move from the mold closing position to the blow molding position, the mouth support plate is driven by the mouth support drive assembly to extend into and abut against the air inlet end position of the parison, wherein the mouth support direction of the parison arranged in pairs is parallel to the mold closing direction of the first mold and the second mold;

[0011] The blow molding assembly comprises a blow drive assembly and a blow pipe. When the parison is located at the blow molding position, the blow drive assembly is used to drive the blow pipe to pass through the parison air inlet end behind the support opening and blow the parison in the mold cavity.

[0012] As a further optimization scheme of the present invention, the blow molding module also includes a mold closing shift assembly and a blow molding shift assembly. The output end of the blow molding shift assembly is transmission connected to the slide. The slide is provided with a mold closing shift assembly. The output end of the mold closing shift assembly is transmission connected to the first mold and the second mold respectively.

[0013] As a further optimization scheme of the present invention, the mold closing and shifting assembly includes 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 to the swing arm, the two ends of the swing arm are respectively rotatably connected to the first transition rod and the second transition rod, the end of the first transition rod away from the swing arm is rotatably connected to a push plate, the push plate is fixedly connected to the sliding rod, the end of the first mold away from the second mold is fixedly connected to the first mold base, the first mold base is fixedly connected to the end of the sliding rod away from the push plate, the end of the second mold away from the first mold is fixedly connected to the second mold base, the sliding rod passes through the second mold base and is slidably connected to the second mold base, wherein the first mold base and the second mold base are respectively slidably connected to the sliding base;

[0014] The blow molding shift assembly includes a second motor, a 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 to the screw, and the screw is threadedly connected to the slide. A guide rod is mounted on the base, and the guide rod passes through the slide and is slidably connected to the slide.

[0015] As a further optimization scheme of the present invention, the opening drive assembly comprises an upper plate, a lower plate, an upper rotating rod and a lower rotating rod, the lower plate is fixedly arranged on the first mold and the second mold respectively, the upper plate is arranged above the lower plate, the upper plate is fixedly connected with a guide column on the side facing the lower plate, the guide column penetrates the lower plate and is slidably connected with the lower plate, the side of the guide column located between the upper plate and the lower plate is sleeved with a first spring, wherein the lower plate is rotatably connected with the lower rotating rod at the yielding arc position, the outer end of the lower rotating rod is rotatably connected with the upper rotating rod, the end of the upper rotating rod away from the lower rotating rod is rotatably connected with the upper plate, and the opening plate is fixedly arranged on the side of one end of the lower rotating rod adjacent to the upper rotating rod;

[0016] Among them, along the direction from the mold closing position to the blowing position, the front end of the upper plate is fixedly connected with an abutment plate, and the front position of the upper plate is provided with an abutment rail, which is fixed on the workbench through a fixed seat. When the blow molding module drives the parison to move to the blowing position, the abutment plate and the abutment rail are frictionally abutted.

[0017] As a further optimization scheme of the present invention, mold end seats are respectively arranged at the upper position of the first mold adjacent to the mold groove and at the upper position of the second mold adjacent to its own mold groove, and the lower edge of the mold end seat has a flange portion. Along the direction perpendicular to the mold closing direction, the maximum distance between the flange portions of the mold end seat is smaller than the outer diameter dimension value of the blank.

[0018] As a further optimization scheme of the present invention, the air inlet end of the blowing pipe is connected to an air delivery cylinder, the outer diameter of the air delivery cylinder is larger than the outer diameter of the blowing pipe, and the end of the air delivery cylinder adjacent to the blowing pipe has an extrusion cone, when the blowing pipe is extended into the mold cavity, the conical surface of the extrusion cone is in frictional contact with the inner wall of the conical groove of the mold end seat;

[0019] Among them, a card slot is opened on one side of the extrusion cone toward the mold opening direction, and a card connection component is respectively arranged in the first mold and the second mold, and the card block of the card connection component is arranged corresponding to the card slot. When the parison moves from the mold closing position to the blow molding position, the transmission card block of the card connection component abuts against the card slot.

[0020] As a further optimization scheme of the present invention, the clamping assembly includes a wedge block, a guide rod and a second spring. The first mold and the second mold are respectively slidably connected with guide rods, the outer ends of the guide rods are fixedly connected with corresponding clamping blocks, the inner ends of the guide rods are fixedly connected with wedge blocks, the guide rod on one side of the wedge block is sleeved with a second spring, the wedge block is in transmission contact with the corresponding guide column, wherein one end of the guide column located in the first mold and the second mold has a circular arc convex portion.

[0021] As a further optimization scheme of the present invention, a cutting drive assembly is arranged on the workbench, and the output end of the cutting drive assembly is transmission-connected with a cutting knife. The cutting drive assembly is used to drive the cutting knife to cut the extruded parison, and along the vertical direction, the blade position of the cutting knife is lower than the lower surface position of the lower plate.

[0022] As a further optimization scheme of the present invention, along the direction from the mold closing position to the blow molding position, the front side of the first mold base and the front side of the second mold base are respectively fixedly connected with clamping plates, and a material supporting assembly is arranged in front of the clamping plates, the material supporting assembly includes a side baffle rod and a support plate, a bracket is fixedly arranged on one side of the workbench, the side baffle rod and the support plate are respectively fixedly connected to the bracket, and the area between the side baffle rod and the support plate is the blanking area.

[0023] As a further optimization scheme of the present invention, the blowing drive assembly includes a hydraulic cylinder and an air compressor. The hydraulic cylinder is arranged on a fixed seat, and the output end of the hydraulic cylinder is fixedly connected to a mounting seat. An air cylinder is installed on the mounting seat, and the air inlet end of the air cylinder is connected to the output end of the air compressor.

[0024] The present invention has at least the following beneficial effects: the bottle blowing equipment for producing plastic packaging bottles provided by the present invention is provided with an extrusion mechanism, a blow molding module, a mouth-opening assembly and a blow molding assembly. The blow molding module is used to shift the parison from the mold closing position to the blow molding position. With the aid of the abutment transmission of the abutment plate and the abutment rail in the mouth-opening assembly, the paired mouth-opening plates are swung to the air inlet end of the parison to open the air inlet end opening of the parison, effectively preventing the problem of air inlet end blockage caused by collapse or even stacking due to the soft texture of the parison exposed to the outside, and facilitating the subsequent air blowing pipe to smoothly enter the inner cavity of the parison for blow molding operation;

[0025] Moreover, by moving the upper plate downward, the transmission block is engaged with the slot, thereby increasing the contact area between the parison and the extrusion cone, and by using the support plate to assist in supporting the air inlet end of the parison, it is ensured that the air inlet end of the parison is extruded evenly in the cone groove of the extrusion cone and the mold end seat with good sealing. In addition, when the plastic bottle is demoulded, the parison is engaged in the slot, so that the plastic bottle is suspended on the air pump and demoulding is smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 The present invention Figure 1 A schematic diagram of the front structure of

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

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

[0030] Figure 5 The present invention Figure 4 Enlarged view of point A in the middle;

[0031] Figure 6 The side partial cross-sectional structure diagram of the blow molding module and the support assembly of the present invention is shown in FIG. Figure 1 ;

[0032] Figure 7 The side partial cross-sectional structure diagram of the blow molding module and the support assembly of the present invention is shown in FIG. Figure 2 ;

[0033] Figure 8 It is a structural schematic diagram of the mold clamping and shifting assembly, the first mold and the second mold of the present invention;

[0034] Fig. 9 is a schematic structural diagram of a blow molding assembly of the present invention;

[0035] Fig.10 The present invention Fig. 9 Enlarged view of point B in the middle;

[0036] Fig.11 The side partial cross-sectional structure diagram of the blow molding module and the support assembly of the present invention is shown in FIG. Figure 3 ;

[0037] Fig.12 The present invention Fig.11 Enlarged view of point C in the middle.

[0038] In the figure: 1, extrusion mechanism; 11, die; 12, heating assembly; 13, feed barrel; 14, cutting knife; 15, cutting drive assembly; 16, parison; 2, mouth support assembly; 21, abutment rail; 22, abutment plate; 23, upper plate; 24, first spring; 25, guide column; 26, lower plate; 27, upper rotating rod; 28, mouth support plate; 29, lower rotating rod; 210, wedge block; 211, second spring; 212, guide rod; 213, clamping block; 3, blow molding module; 31, second motor; 32, screw rod; 33, slide seat; 34, base; 35, swing arm; 36, first Transition rod; 37, push plate; 38, slide rod; 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 assembly; 41, air compressor; 42, fixed seat; 421, through hole; 43, hydraulic cylinder; 44, air cylinder; 45, air pipe; 46, air blowing pipe; 47, extrusion cone; 471, slot; 48, mounting seat; 5, support assembly; 51, side stop rod; 52, bracket; 53, support plate; 54, workbench. DETAILED DESCRIPTION

[0039] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, the present invention provides a bottle blowing device for producing plastic packaging bottles, comprising:

[0041] An extrusion mechanism 1, the extrusion mechanism 1 is used to extrude a 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 component 12, and a feed barrel 13. The feed barrel 13 is mounted on a workbench 54. The feed barrel 13 is provided with a heating component 12 for melting and heating the plastic material in the feed barrel 13. The output end of the feed barrel 13 is provided with a die 11. The plastic granular raw material is heated and transported through the feed barrel 13, and a hollow cylindrical structure parison 16 is extruded by the die 11 and droops between the first mold 310 and the second mold 311 under the action of gravity.

[0047] For example, see Figure 2 , Figure 3 and Figure 8 The blow molding module 3 also includes a mold closing shift component and a blow molding shift component. The output end of the blow molding shift component is transmission-connected with the slide 33. The slide 33 is provided with a mold closing shift component. The output end of the mold closing shift component is transmission-connected with the first mold 310 and the second mold 311 respectively. The blow molding shift component is used to drive the mold closing shift component to perform a linear shift between the mold closing position and the blow molding position through the slide 33, and the mold closing shift component is used to realize the adjustment of the mold opening and closing states between the first mold 310 and the second mold 311.

[0048] Continue reading Figure 8 The mold closing and shifting assembly includes a first motor 314, a swing arm 35, a first transition rod 36, a second transition rod 313 and a slide bar 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 rotatably connected to the first transition rod 36 and the second transition rod 313 respectively. The end of the first transition rod 36 away from the swing arm 35 is rotatably connected to the push plate 37. The push plate 37 is fixedly connected to the slide bar 38. The end of the first mold 310 away from the second mold 311 is fixedly connected to the first mold base 39. The first mold base 39 is fixedly connected to the end of the slide bar 38 away from the push plate 37. The end of the second mold 311 away from the first mold 310 is fixedly connected to the second mold base 312. The slide bar 38 penetrates the second mold base 312 and is slidably connected to the second mold base 312, wherein the first mold base 39 and the second mold base 312 are slidably connected to the slide base 33 respectively.

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

[0050] In the above embodiment, 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 drive 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 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 away from the lower rotating rod 29 is rotatably connected with the upper layer plate 23. A mouth expanding plate 28 is fixedly arranged on the side of one end 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 parison 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 parison 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 drive 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 opening plates 28 swing symmetrically to the opening position, and the edges of the parison 16 that are close to each other due to the clamping of the two molds are reopened to increase the left and right spacing, and the opening plates 28 are used to assist the structure of the edge of the air inlet end of the parison 16 to effectively prevent the parison 16 from collapsing and stacking inwards due to its soft texture after heating, thereby blocking the air inlet end of the parison 16, and fully ensuring that the subsequent blowing pipe 46 can smoothly extend into the parison 16 in the mold cavity to ensure the quality of blow molding;

[0054] It should be noted that during the blow molding process, the abutment plate 22 is always in frictional contact with the abutment rail 21, and after the blow molding is completed, the first mold 310 and the second mold 311 move in opposite directions, so that the abutment plate 22 moves synchronously with their respective molds until the abutment plate 22 moves outside the abutment rail 21, that is, the abutment plate 22 and the abutment rail 21 are separated, so that under the elastic force of the first spring 24, the upper plate 23 moves upward, causing the support plate 28 to move in the opposite direction to the initial position, thereby allowing the packaging bottle structure formed by blow molding to be demolded from the mold.

[0055] It should be noted that, since the air inlet end of the parison 16 exposed outside the mold cavity is not directly cooled by the cooling assembly in the mold, the portion of the parison 16 outside the mold cavity will cool slower than the portion of the parison 16 located in the inner cavity of the mold. That is, the portion of the parison 16 outside the mold cavity is softer than the portion of the parison 16 located in the mold cavity. However, the parison 16 located outside is not soft enough to be stretched arbitrarily. Therefore, during the mold opening process, the support plate 28 will squeeze over the edge of the air inlet port of the parison 16, and the parison 16 will not obstruct the support plate 28 or the support plate 28 will cause tensile deformation of the parison 16.

[0056] It should be noted that, please continue to refer to Figure 3 The workbench 54 is provided with a cutting drive assembly 15, the output end of which is connected to a cutting knife 14, and 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 plate 26. Exemplarily, the cutting drive assembly 15 is a hydraulic telescopic component, an electric telescopic component, an electrical telescopic component, etc., which are 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 (by Figure 3 Taking the orientation shown as an example), the cutting knife 14 passes under the lower plate 26 to cut the parison 16, which on the one hand reduces the amount of the parison 16 exposed to the outside, and on the other hand facilitates the bracing operation of the bracing plate 28.

[0057] For example, see Figure 6, mold end seats 301 are respectively provided at the upper position of the first mold 310 adjacent to the mold groove and at the upper position of the second mold 311 adjacent to its own mold groove, wherein the mold groove is a groove opened in the mold for forming the packaging bottle body structure, and the lower edge of the mold end seat 301 has a flange portion, and the maximum distance between the flange portions of the mold end seat 301 in the direction perpendicular to the mold closing direction is less than the outer diameter dimension value of the preform 16. When the mold is closed, the flange portions of the lower edges of the mold end seats 301 are spliced ​​together to clamp and squeeze the preform 16, so that the preform 16 in the mold cavity is kept vertical under the action of gravity, and the maximum distance between the flange portions of the mold end seats 301 is less than the outer diameter dimension value of the preform 16, so that the mold end seat 301 only squeezes the left and right sides (with the outer diameter dimension value of the preform 16) of the preform 16. Figure 2 The front and rear sides are not constrained by the extrusion clamping, so as to avoid the entire circumference of the parison 16 being squeezed and clamped to cause excessive wrinkles at the air inlet end, which affects the sealing effect of the subsequent air delivery cylinder 44 on the air inlet end of the parison 16.

[0058] For example, see Fig. 9 , Fig.10 and Fig.11 The air inlet end of the blowing 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 blowing pipe 46, and the end of the air delivery cylinder 44 adjacent to the blowing pipe 46 has an extrusion cone 47. When the air inlet end of the parison 16 clamped by the mold and displaced to the blow molding position (that is, the portion of the parison 16 located in the cone groove of the mold end seat 301) is supported by the edge of the support plate 28, the blowing pipe 46 smoothly passes through the air inlet end and extends into the mold cavity, and the extrusion cone 47 of the air delivery cylinder 44 also smoothly reaches the position of the air inlet end of the parison 16 close to the mold cavity, as shown in FIG. Fig.11 As shown, when the blowing pipe 46 is smoothly extended into the mold cavity, the conical surface of the extrusion cone 47 and the inner wall of the conical groove of the mold end seat 301 are frictionally abutted, so that the air inlet end of the parison 16 located outside is abutted and sealed by means of the abutment of the conical surface of the extrusion cone 47 and the inner wall of the conical groove of the mold end seat 301, and the auxiliary support of the above-mentioned support plate 28 is used to prevent the air inlet end of the parison 16 from collapsing, and to avoid the occurrence of stacking and wrinkling of the parison 16 part between the conical surface of the extrusion cone 47 and the inner wall of the conical groove of the mold end seat 301, which causes wrinkle gaps when the part is squeezed, especially when the thickness of the plastic parison is large, the extrusion gaps caused by the squeezing of the stacked wrinkled part are more serious, ensuring that the blow molding process continuously provides sufficient pressure to the inner cavity of the parison 16 to ensure the blow molding effect, such as Fig.11 As shown, the outline structure shape indicated by the bold black line is the structural outline formed after the parison 16 located in the mold cavity is blow-molded, that is, the structural part of the plastic bottle retained later, including the bottle mouth and the bottle body, and its structure is determined by the shapes of the mold grooves of the first mold 310 and the second mold 311;

[0059] Among them, continue to refer to Fig.10 , Fig.11 and Fig.12 A card slot 471 is provided on one side of the extrusion cone 47 facing the mold opening direction. A card connection assembly is respectively provided in the first mold 310 and the second mold 311. The card block 213 of the card connection assembly is arranged corresponding to the card slot 471. When the parison 16 moves from the mold closing position to the blow molding position, the transmission card block 213 of the card connection assembly abuts against the card slot 471.

[0060] For example, Fig.11 and Fig.12 As shown, the clamping assembly includes a wedge block 210, a guide rod 212 and a second spring 211. The guide rod 212 is slidably connected in the first mold 310 and the second mold 311 respectively. The outer end of the guide rod 212 is fixedly connected with the corresponding clamping block 213, and the inner end of the guide rod 212 is fixedly connected with the wedge block 210. The guide rod 212 on one side of the wedge block 210 is sleeved with the second spring 211. The wedge block 210 is in transmission contact with the corresponding guide column 25, wherein one end of the guide column 25 located in the first mold 310 and the second mold 311 has an arc convex portion.

[0061] In the above embodiment, when the upper plate 23 moves downward, the arc convex part of the guide column 25 squeezes the wedge block 210, so that the guide rod 212 drives the clamping block 213 to protrude to the outside of the mold end seat 301. When the preform 16 is shifted to the blow molding position, the air delivery cylinder 44 moves downward to the clamping block 213 and the clamping groove 471, so that the preform 16 located outside is clamped between the clamping block 213 and the clamping groove 471, increasing the contact area between the preform 16 and the extrusion cone 47 of the air delivery cylinder 44, and improving the seal between the preform 16 and the air delivery cylinder 44. The sealing property ensures the blowing effect, and then ensures the blow molding quality, reduces the product defects caused by leakage, and 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, the exposed part of the preform 16 (that is, the excess preform 16 part in the conical groove of the mold end seat 301) is clamped on the outside of the extrusion cone 47, thereby enhancing the blow-molded packaging bottle product to be better suspended on the gas cylinder 44, which is conducive to the smooth demoulding of the plastic packaging bottle product.

[0062] It should be noted that, please continue to refer to Figure 2 , along the direction from the mold closing position to the blow molding position, the front side of the first mold base 39 and the front side of the second mold base 312 are respectively fixedly connected with a clamping plate 315, and a supporting assembly 5 is arranged in front of the clamping plate 315, and the supporting assembly 5 includes a side baffle 51 and a support plate 53. A bracket 52 is fixedly arranged on one side of the workbench 54, and the side baffle 51 and the support plate 53 are respectively fixedly connected to the bracket 52, and the area between the side baffle plate and the support plate 53 is the blanking area.

[0063] Therefore, after demoulding, when the first mold 310 and the second mold 311 move to the left to the initial position and clamp the new preform 16 again, the originally blow-molded packaging bottle product is clamped by the clamping plate 315, so that under the drive of the hydraulic cylinder 43, the air delivery cylinder 44 drives the blowing pipe 46 to move upward, so that the extrusion cone 47 of the air delivery cylinder 44 is separated from the excess part of the air inlet end of the packaging bottle product, and in the process of the new preform 16 moving to the right, the originally blow-molded packaging bottle product is transported and shifted to the blanking area on the right, so that the packaging bottle product can be taken away with the help of the robot arm later.

[0064] It should be noted that after the blow-molded plastic packaging bottle is taken away by the robotic arm, the upper end of the bottle mouth, that is, the part of the parison 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 corresponding cutting device, thereby retaining the bottle body structure of the packaging bottle, which will not be elaborated here.

[0065] It should be noted that if Fig. 9 As shown, the blowing drive assembly includes a hydraulic cylinder 43 and an air compressor 41, wherein the hydraulic cylinder 43 is arranged on a fixed seat 42, and the output end of the hydraulic cylinder 43 is fixedly connected to a mounting seat 48, and an air delivery cylinder 44 is installed on the mounting seat 48, and the air inlet end of the air delivery cylinder 44 is connected to the output end of the air compressor 41, so that the mounting seat 48 is driven by the hydraulic cylinder 43 to drive the air delivery cylinder 44 to move up and down, so that the blowing pipe 46 is extended into or out of the air inlet end of the parison 16, and when the blowing pipe 46 extends into the mold cavity through the air inlet end of the parison 16, the air is transported to the blowing pipe 46 through the air delivery cylinder 44 by means of the air compressor 41 for blow molding, as shown in FIG. Fig. 9 As shown, a through hole 421 is opened on the fixing seat 42 , so that the air delivery cylinder 44 drives the air blowing pipe 46 to move to the bottom of the fixing seat 42 through the through hole 421 .

[0066] It should be noted that, when the blow molding equipment for producing plastic packaging bottles is used, the parison 16 is extruded through 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 toward each other, so that the first mold 310 and the second mold 311 move toward each other to close the mold, and the flange portion of the mold end base 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, the second motor 31 is started to move the slide 33 rightward to the blow molding position. During the movement, the abutment plate 22 abuts against the abutment rail 21, causing the lower plate 26 to move downward, thereby causing the upper rotating rod 27 to drive the lower rotating rod 29 to rotate, so that the paired support plates 28 swing to the edge of the air inlet end of the parison 16 to support and auxiliary support the air inlet end of the parison 16, thereby effectively preventing the part of the parison 16 exposed in the conical 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 parison 16;

[0068] Next, the hydraulic cylinder 43 is started, driving the mounting seat 48 to drive the air delivery cylinder 44, so that the air blowing pipe 46 extends into the blow molding inner cavity of the parison 16, and the extrusion cone 47 abuts against the inner wall of the cone groove of the mold end seat 301, so that the air compressor 41 sequentially supplies air to the air blowing pipe 46 through the air delivery pipe 45 and the air delivery cylinder 44 to achieve blow molding; and when the upper plate 23 moves downward, the clamping block 213 protrudes to the outside of the mold end seat 301, and when the extrusion cone 47 moves downward, the clamping block 213 is clamped with the clamping groove 471, thereby increasing the contact area between the parison 16 and the extrusion cone 47;

[0069] After the blow molding is finished, the first motor 314 is started first to make the first mold 310 and the second mold 311 move back to each other for mold opening. In the mold opening process, the opening plate 28 passes over the edge of the exposed parison 16 and fits with the large area of ​​the parison 16 through the card slot 471, which helps the plastic packaging bottle to be always suspended on the gas cylinder 44 during the demoulding process. When the upper plate 23 moves to the outside of the abutment rail 21, the upper plate 23 moves up to make the opening plate 28 reset to the initial position, and the slide 33 moves to the left to the mold closing position. When the first mold 310 and the second mold 311 clamp and close the parison 16 again, the clamping plate 315 clamps the blown packaging bottle. At this time, the gas cylinder 44 moves up to make the blowing pipe 46 withdraw from the packaging bottle, and when the slide 33 moves right to the blow molding position, the clamping plate 315 transports the blown packaging bottle to the blanking area.

[0070] It should be noted that, for the plastic bottles transported to the blanking area, there is a portion of the parison that was originally located in the conical groove of the mold end seat 301 remaining at the bottle mouth, and there is a protruding portion at the bottle bottom caused by the clamping of the parison 16 by the first mold 310 and the second mold 311. Both of these will be cut off with the help of the cutting device, so that the remaining portion will serve as the packaging bottle structure.

[0071] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A bottle blowing equipment for producing plastic packaging bottles, characterized in that: include: An extrusion mechanism (1), the extrusion mechanism (1) being used to extrude a parison (16); A blow molding module (3), comprising 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 a mold closing position, the extruded parison (16) is located in a mold cavity formed between the first mold (310) and the second mold (311), and an air inlet end of the parison (16) extends out of the mold cavity; A mouth support assembly (2) is respectively arranged on the first mold (310) and the second mold (311), the mouth support assembly (2) comprising a mouth support plate (28) and a mouth support drive assembly, the mouth support drive assembly being in driving connection with the mouth support plate (28), when the blow molding mold assembly (3) drives the parison (16) to move from the mold closing position to the blow molding position, the mouth support plate (28) is driven by the mouth support drive assembly to extend into and abut against the air inlet end position of the parison (16), wherein the mouth support direction of the parison (16) arranged in pairs is parallel to the mold closing direction of the first mold (310) and the second mold (311); The blow molding assembly (4) comprises a blow drive assembly and a blow pipe (46). When the parison (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 parison (16) behind the support opening and blow the parison (16) in the mold cavity.

2. The bottle blowing equipment for producing plastic packaging bottles according to claim 1, characterized in that: The blow moulding module (3) further comprises a mould closing displacement component and a blow moulding displacement component, wherein the output end of the blow moulding displacement component is transmission-connected to the slide seat (33), the slide seat (33) is provided with a mould closing displacement component, and the output end of the mould closing displacement component is transmission-connected to the first mould (310) and the second mould (311), respectively.

3. A bottle blowing equipment for producing plastic packaging bottles according to claim 2, characterized in that: The mold closing and shifting assembly comprises a first motor (314), a swing arm (35), a first transition rod (36), a second transition rod (313) and a sliding 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 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 sliding rod (38); One end of the mold (310) away from the second mold (311) is fixedly connected to the first mold base (39), the first mold base (39) is fixedly connected to one 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 the 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), wherein the first mold base (39) and the second mold base (312) are respectively slidably connected to the slide base (33); The blow molding displacement assembly comprises a second motor (31), a screw rod (32) and a base (34); the second motor (31) is fixedly mounted on the workbench (54) via the base (34); the output end of the second motor (31) is fixedly connected to the screw rod (32); the screw rod (32) is threadedly connected to a slide seat (33); 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).

4. The bottle blowing equipment for producing plastic packaging bottles according to claim 3, characterized in that: The opening drive assembly comprises an upper plate (23), a lower plate (26), an upper rotating rod (27) and a lower rotating rod (29); the lower plate (26) is fixedly arranged on the first mold (310) and the second mold (311), respectively; the upper plate (23) is arranged above the lower plate (26); a guide column (25) is fixedly connected to the side of the upper plate (23) facing the lower plate (26); the guide column (25) passes through the lower plate (26) and is slidably connected to the lower plate (26); The guide column (25) is located between the upper plate (23) and the lower plate (26) and is sleeved with a first spring (24) on its side, wherein a lower rotating rod (29) is rotatably connected to the lower plate (26) at the yielding arc position, an outer end of the lower rotating rod (29) is rotatably connected to an upper rotating rod (27), an end of the upper rotating rod (27) away from the lower rotating rod (29) is rotatably connected to the upper plate (23), and a support plate (28) is fixedly arranged on the side of one end of the lower rotating rod (29) adjacent to the upper rotating rod (27); In the direction from the mold closing position to the blow molding position, the front end of the upper plate (23) is fixedly connected to an abutment plate (22), and an abutment rail (21) is provided in front of the upper plate (23). The abutment rail (21) is fixedly provided on the workbench (54) via a fixed seat (42). When the blow molding module (3) drives the parison (16) to move to the blow molding position, the abutment plate (22) and the abutment rail (21) are in frictional contact with each other.

5. The bottle blowing equipment for producing plastic packaging bottles according to claim 4, characterized in that: A mold end seat (301) is respectively provided at an upper position adjacent to the mold groove of the first mold (310) and an upper position adjacent to the mold groove of the second mold (311), and the lower edge of the mold end seat (301) has a flange portion. In a direction perpendicular to the mold closing direction, the maximum distance between the flange portions of the mold end seat (301) is less than the outer diameter dimension value of the blank (16).

6. The bottle blowing equipment for producing plastic packaging bottles according to claim 5, characterized in that: The air inlet end of the air blowing 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 air blowing pipe (46), and one end of the air delivery cylinder (44) adjacent to the air blowing pipe (46) is provided with an extrusion cone (47), and when the air blowing pipe (46) is extended into the mold cavity, the conical surface of the extrusion cone (47) is in frictional contact with the inner wall of the conical groove of the mold end seat (301); A clamping groove (471) is provided on one side of the extrusion cone (47) facing the mold opening direction, and a clamping assembly is provided in each of the first mold (310) and the second mold (311), and a clamping block (213) of the clamping assembly is arranged corresponding to the clamping groove (471). When the parison (16) moves from the mold closing position to the blow molding position, the transmission clamping block (213) of the clamping assembly abuts against the clamping groove (471).

7. The bottle blowing equipment for producing plastic packaging bottles according to claim 6, characterized in that: The clamping assembly comprises a wedge block (210), a guide rod (212) and a second spring (211); the first mold (310) and the second mold (311) are slidably connected with the guide rod (212) respectively; the outer end of the guide rod (212) is fixedly connected with the corresponding clamping block (213); the inner end of the guide rod (212) is fixedly connected with the wedge block (210); the guide rod (212) on one side of the wedge block (210) is sleeved with the second spring (211); the wedge block (210) is in driving contact with the corresponding guide column (25); wherein one end of the guide column (25) located in the first mold (310) and the second mold (311) both has an arc convex portion.

8. The bottle blowing equipment for producing plastic packaging bottles according to claim 7, characterized in that: The workbench (54) is provided with a cutting drive assembly (15), the output end of the cutting drive assembly (15) being transmission-connected to a cutting knife (14), the cutting drive assembly (15) being 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 plate (26).

9. The bottle blowing equipment for producing plastic packaging bottles according to claim 8, characterized in that: Along the direction from the mold closing position to the blow molding position, the front side of the first mold base (39) and the front side of the second mold base (312) are respectively fixedly connected with a clamping plate (315), and a material support assembly (5) is arranged in front of the clamping plate (315), and the material support assembly (5) comprises a side blocking rod (51) and a support plate (53). A bracket (52) is fixedly arranged on one side of the workbench (54), and the bracket (52) is respectively fixedly connected with the side blocking rod (51) and the support plate (53), and the area between the side blocking rod (51) and the support plate (53) is a material dropping area.

10. The bottle blowing equipment for producing plastic packaging bottles according to claim 9, characterized in that: The air blowing drive assembly comprises 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 to a mounting seat (48); an air delivery cylinder (44) is mounted on the mounting seat (48); and the air inlet end of the air delivery cylinder (44) is connected to the output end of the air compressor (41).

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