Bottle blowing machine and operation method thereof

Abstract

The invention discloses a bottle blowing machine and an operation method thereof.The bottle blowing machine comprises a rack, a forming mold and an air blowing assembly, the forming mold comprises a first mold body, a second mold body, a bottom mold body and a driving part, the first mold body and the second mold body define a mold cavity for containing a bottle blank, and a containing opening is formed in the top side of the forming mold body; the driving piece can drive the first mold and the second mold to move, the bottle opening part of the bottle blank can be clamped at the placing opening, a communicating opening is formed in the bottom side of the forming mold, the bottom mold is used for blocking the communicating opening, and part of the bottom mold protrudes towards the interior of the mold cavity; the blowing assembly comprises an end socket and a blowing part, the end socket can be clamped on the inner side wall of the bottle opening part, and the blowing part communicates with the interior of the bottle blank through the end socket; when the driving piece drives the first mold and the second mold to be separated, the sealing head and the bottom mold limit the upper end and the lower end of the bottle correspondingly, the relative position of the bottle can be limited when the bottle is demolded and separated, the bottle is prevented from being attached to the first mold or the second mold, and the bottle demolding convenience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bottle blowing, and in particular to a bottle blowing machine and an operating method thereof. Background Art

[0002] Bottle blowing equipment is a key manufacturing device widely used in the production of plastic bottles and other plastic containers. This equipment primarily uses plastic raw materials such as polyethylene (PE), polypropylene (PP), or polyester (PET). After heating and softening the preform at high temperatures, it is placed in a split mold. Immediately after the mold is closed, compressed air is introduced into the preform, inflating it until it adheres tightly to the mold's inner wall. After cooling and demolding, various hollow products are obtained.

[0003] Currently, commonly used bottle blowing equipment includes a first forming mold and a second forming mold that can be moved toward or away from each other. The first and second forming molds enclose a mold cavity, into which a preform is placed for blow molding. This existing technology has the following drawbacks: the preform may adhere to the forming mold during demolding, and manual removal may damage the finished product, reducing the blow molding yield. Furthermore, heat from the mold that remains undissipated during manual removal can pose a risk to workers. Summary of the Invention

[0004] The object of the present invention is to provide a bottle blowing machine with a simple structure, and its head and bottom mold can respectively limit the two ends of the bottle in the vertical direction when the bottle is demolded after the bottle blank is formed, thereby reducing the adhesion between the bottle and the mold and improving the qualified rate of bottle blowing.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a bottle blowing machine is provided, comprising a frame, a forming mold and a blowing assembly, wherein the forming mold is arranged on the frame, the forming mold comprises a first mold, a second mold, a bottom mold and a driving member, both sides of the first mold and the second mold adjacent to each other are recessed with placement grooves, the two placement grooves enclose a mold cavity for accommodating a bottle blank, the top side of the forming mold is provided with a placement port communicating with the mold cavity, the driving member can drive the first mold and the second mold to rotate toward each other to open or close the mold cavity, the bottle mouth portion of the bottle blank can be clamped at the placement port, the bottle mouth portion partially extends outside the placement port, the forming mold The bottom side of the mold is provided with a communication port communicating with the mold cavity, the bottom mold is slidably arranged in a vertical direction and can be selectively locked, the bottom mold is used to block the communication port, and at least a portion of the bottom mold protrudes toward the mold cavity; the blowing assembly includes a head and a blowing piece, the head is located above the forming mold, the head is slidably arranged in the vertical direction and can be selectively locked, the head can be clamped on the inner side wall of the bottle mouth, and the blowing piece is connected with the interior of the bottle blank through the head; when the driving member drives the first mold and the second mold to separate, the head and the bottom mold respectively define the upper and lower ends of the bottle mold after the bottle blank is formed.

[0007] As a preferred solution of the bottle blowing machine, the bottle blowing machine also includes a turntable, which is arranged on the frame, the forming mold is arranged on the turntable and adjacent to the outer edge of the turntable, the bottom mold and the head are respectively slidably arranged on the turntable, and the turntable can drive the forming mold and the blowing assembly to rotate around the rotation center axis of the turntable.

[0008] As a preferred solution of the bottle blowing machine, the bottle blowing machine also includes an upper guide rail arranged on the frame, and the upper guide rail is located above the forming mold, the length of the upper guide rail extends along the rotation direction of the turntable, and along the rotation direction of the turntable, the top side of the upper guide rail has a first step surface and a second step surface arranged horizontally, the height D1 of the first step surface is lower than the height D2 of the second step surface, and the first step surface and the second step surface are connected through a first inclined surface, the blowing assembly also includes a first bracket, the first bracket is arranged on the turntable, and the length of the first bracket extends along the vertical direction, the head is slidably connected to the first bracket, when the head slides on the first step surface, the head is inserted into the bottle mouth part, the head can slide along the first step surface and the first inclined surface to the second step surface, when the head slides on the first step surface and the first inclined surface, the head is inserted into the bottle mouth part, and when the head slides to the second step surface, the head is separated from the bottle mouth part.

[0009] As a preferred solution for the bottle blowing machine, the head includes a mounting portion and a plug-in portion, the mounting portion is slidably arranged on the first bracket, the plug-in portion is protruding from the bottom side of the mounting portion, and the top side of the upper guide rail also includes a horizontally arranged third step surface, along the rotation direction of the turntable, the third step surface is located between the first step surface and the second step surface, the height of the third step surface is D3, D1<D3<D2, the first step surface and the second step surface, and the second step surface and the third step surface are all connected through the first inclined surface, when the head is slidably arranged on the third step surface, the plug-in portion is partially inserted into the bottle mouth portion, the mounting portion and the bottle mouth portion are spaced apart, and the outer periphery of the bottle mouth portion can be used for an external manipulator to clamp and cut materials.

[0010] As a preferred solution for the bottle blowing machine, the upper guide rail is a first arc-shaped guide rail, the center of the first arc-shaped guide rail coincides with the rotation center of the turntable, a first limiting portion is provided on the first bracket, and a second limiting portion is provided on the head. When the head is separated from the first arc-shaped guide rail, the second limiting portion moves downward along the vertical direction and stops on the first limiting portion, and the head is inserted into the bottle mouth.

[0011] As a preferred solution of the bottle blowing machine, the bottle blowing machine also includes a lower guide rail arranged on the frame, and the lower guide rail is located below the forming mold, the length of the lower guide rail extends along the rotation direction of the turntable, and along the rotation direction of the turntable, the top side of the lower guide rail has a horizontally arranged fourth step surface, a fifth step surface and a sixth step surface, the height D4 of the fourth step surface is equal to the height D6 of the sixth step surface, the height D5 of the fifth step surface is lower than the height D4 of the fourth step surface, and a second inclined surface is respectively connected between the fourth step surface and the fifth step surface, and between the fifth step surface and the sixth step surface. Next, the forming mold further includes a second bracket, which is slidably arranged on the turntable along the vertical direction, and the bottom mold is arranged on the second bracket, and the end of the second bracket away from the bottom mold can be slidably connected to the lower guide rail. After the first mold and the second mold demould the bottle, the end of the second bracket away from the bottom mold slides from the fourth step surface to the fifth step surface, and the bottle blank is loaded when the end of the second bracket away from the bottom mold is slidably arranged on the fifth step surface. After the bottle blank is loaded, the end of the second bracket away from the bottom mold slides from the fifth step surface to the sixth step surface.

[0012] As a preferred solution for the bottle blowing machine, the lower guide rail is a second arc-shaped guide rail, the center of the second arc-shaped guide rail coincides with the rotation center of the turntable, the bottom mold includes a fixing part and a supporting part, the fixing part is arranged at the end of the second bracket away from the second arc-shaped guide rail, the supporting part is provided on the top side of the fixing part, and the supporting part is used to support the bottle blank to form a depression in the bottom of the bottle, one of the outer peripheral wall of the fixing part and the cavity wall of the communicating port is provided with a clamping part, and the other is provided with a clamping groove, when the second bracket is separated from the second arc-shaped guide rail, the clamping part is clamped in the clamping groove.

[0013] As a preferred solution for the bottle blowing machine, the molding mold further includes a spring, and a plurality of the springs are arranged between the turntable and the second bracket. The springs always push the second bracket to move toward the end away from the bottom mold so that the second bracket is pressed against the lower guide rail.

[0014] In a second aspect, a method for operating a bottle blowing machine is provided, which uses the bottle blowing machine described above, and includes the following steps:

[0015] S10, mold opening operation: starting the bottle blowing machine so that the driving member of the forming mold drives the first mold and the second mold to move away from each other to open the mold cavity, and the bottom mold of the forming mold and the head of the blowing assembly move away from each other on both sides in the vertical direction;

[0016] S20, loading operation: using an external manipulator to clamp the bottle blank between the first mold and the second mold, the bottom mold is moved to a specified position along the vertical direction, and the driving member drives the first mold and the second mold to move closer together to close the mold cavity, so that the bottle body of the bottle blank is located in the mold cavity and the bottle mouth of the bottle blank is clamped in the placement opening on the top side of the forming mold;

[0017] S30, bottle blowing operation: the external manipulator is released and moves away from the bottle mouth, the sealing head moves vertically toward the forming mold and is inserted into the bottle mouth, and the blowing parts of the blowing assembly blow the bottle blank to introduce gas into the bottle blank to form a bottle;

[0018] S40, blanking operation: keep the end cap inserted in the bottle mouth and the bottom mold pressed against the bottom of the bottle, use the external manipulator to clamp the bottle mouth, drive the first mold and the second mold to move away from each other by the driving member to open the mold cavity, then separate the bottom mold and the end cap from the bottle along the vertical direction, and the external manipulator unloads the bottle.

[0019] As a preferred solution for the operating method of the bottle blowing machine, in step S40, before the external robot clamps the bottle mouth, the head is moved away from the bottle tool by a specified distance along the vertical direction, the head portion is kept inserted in the bottle mouth, and a spacing space is provided for the external robot to clamp.

[0020] The beneficial effects of the present invention are as follows: through the arrangement of the bottom mold, when the first mold and the second mold are combined to form a mold cavity, the bottom film portion can protrude from the bottom of the mold cavity to support the bottle blank to form a concave bottle bottom, thereby improving the structure and support stability of the bottle; through the restriction of the two ends of the bottle in the vertical direction by the bottom mold and the head, the relative position of the bottle can be limited when the bottle is demolded and separated from the first mold and the second mold, thereby preventing the bottle from adhering to the first mold or the second mold and moving with it, improving the convenience of bottle demolding, ensuring the production qualification rate of the bottle, and avoiding the situation where the bottle and the mold are adhered and the operator needs to intervene to remove the bottle, thereby improving the operating safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0022] Figure 1 Schematic diagram of the structure of the bottle blowing machine (including the frame) according to an embodiment of the present invention;

[0023] Figure 2 1 is a side view of a bottle blowing machine according to an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the structure of the bottle blowing machine according to an embodiment of the present invention (excluding the frame);

[0025] Figure 4 yes Figure 3 A magnified schematic diagram of point A;

[0026] Figure 5 yes Figure 3 An enlarged schematic diagram of point B;

[0027] Figure 6 1 is a schematic structural diagram of an air blowing assembly according to an embodiment of the present invention;

[0028] Figure 7 1 is a schematic structural diagram of an upper guide rail according to an embodiment of the present invention;

[0029] Figure 8 2 is a schematic structural diagram of a lower guide rail according to an embodiment of the present invention;

[0030] Figure 9 Schematic diagram of the clamping state of the first mold and the second mold according to an embodiment of the present invention;

[0031] Figure 10Schematic diagram of the mold opening state of the first mold and the second mold in an embodiment of the present invention.

[0032] In the picture:

[0033] 100. Bottle; 101. Bottle mouth;

[0034] 1. Frame; 2. Molding mold; 21. First mold; 22. Second mold; 23. Bottom mold; 231. Fixing part; 232. Supporting part; 24. Placement groove; 25. Placement port; 26. Communication port; 27. Second bracket; 28. Spring; 3. Blowing assembly; 31. Head; 311. Mounting part; 312. Connecting part; 32. Blowing part; 33. First bracket; 34. First roller; 35. First limiting part; 36. Second limiting part; 37. Connecting rod; 4. Turntable; 5. Upper guide rail; 51. First step surface; 52. Second step surface; 53. Third step surface; 6. Lower guide rail; 61. Fourth step surface; 62. Fifth step surface; 63. Sixth step surface; 7. Second roller. DETAILED DESCRIPTION

[0035] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0036] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0037] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meanings.

[0039] like Figures 1 to 10 As shown, the bottle blowing machine of the embodiment of the present invention includes a frame 1, a forming mold 2 and a blowing assembly 3. The forming mold 2 is arranged on the frame 1. The forming mold 2 includes a first mold 21, a second mold 22, a bottom mold 23 and a driving member. The first mold 21 and the second mold 22 are adjacent to each other and are recessed with a placement groove 24 on both sides. The two placement grooves 24 enclose a mold cavity for accommodating a bottle blank. The top side of the forming mold 2 is provided with a placement opening 25 communicating with the mold cavity. The driving member can drive the first mold 21 and the second mold 22 to rotate toward each other to open or close the mold cavity. The bottle mouth portion 101 of the bottle blank can be clamped at the placement opening 25, and the bottle mouth portion 101 partially extends to the placement opening 25. In addition, a connecting port 26 communicating with the mold cavity is provided on the bottom side of the forming mold 2, and the bottom mold 23 is slidably arranged in the vertical direction and can be selectively locked. The bottom mold 23 is used to block the connecting port 26, and at least part of the bottom mold 23 protrudes toward the mold cavity; the blowing assembly 3 includes a head 31 and a blowing member 32, the head 31 is located above the forming mold 2, the head 31 is slidably arranged in the vertical direction and can be selectively locked, the head 31 can be clamped on the inner side wall of the bottle mouth 101, and the blowing member 32 is connected to the inside of the bottle blank through the head 31; when the driving member drives the first mold 21 and the second mold 22 to separate, the head 31 and the bottom mold 23 respectively define the upper and lower ends of the bottle 100 after the bottle blank is formed.

[0040] It can be understood that, by setting the bottom mold 23, when the first mold 21 and the second mold 22 are combined to form a mold cavity, the bottom film portion can protrude from the bottom of the mold cavity to support the bottle blank to form a concave bottle bottom, thereby improving the structure and support stability of the bottle 100; by the bottom mold 23 and the head 31 limiting the two ends of the bottle 100 in the vertical direction, that is, the head 31 is inserted into the bottle mouth 101 to define the top of the bottle 100, and the bottom mold 23 is pressed against the concave part of the bottom of the bottle 100 to define the bottom of the bottle 100, The relative position of the bottle 100 can be limited when the bottle 100 is demolded and separated from the first mold 21 and the second mold 22, ensuring smooth demolding of the bottle 100 from the first mold 21 and the second mold 22, preventing the bottle 100 from adhering to the first mold 21 or the second mold 22 and moving with it, thereby improving the convenience of demolding the bottle 100, ensuring the production qualification rate of the bottle 100, and avoiding the situation where the bottle 100 adheres to the mold and requires the intervention of the operator to remove the bottle 100, thereby improving the operating safety of the operator.

[0041] It should be noted that the first mold 21 and the second mold 22 are symmetrical structures. Therefore, a placement opening 25 and a communication opening 26 are provided on the side adjacent to each other of the first mold 21 and the second mold 22. In this embodiment, the bottle body of the bottle 100 is cylindrical. Therefore, a semi-cylindrical placement groove 24 is provided on the side adjacent to each other of the first mold 21 and the second mold 22. The placement opening 25 and the communication opening 26 respectively pass through both sides of each semi-cylindrical placement groove 24 in the vertical direction, and the bottle mouth 101 is clamped between the two placement openings 25.

[0042] In this embodiment, if Figure 1 、 Figure 2 and Figure 3 As shown, the bottle blowing machine also includes a turntable 4, which is arranged on the frame 1. The forming mold 2 is arranged on the turntable 4 and adjacent to the outer edge of the turntable 4. The bottom mold 23 and the head 31 are respectively slidably arranged on the turntable 4. The turntable 4 can drive the forming mold 2 and the blowing assembly 3 to rotate around the rotation center axis of the turntable 4. The turntable 4 centrally arranges the bottom mold 23, the head 31 and the forming mold 2 on a rotating platform, which can reduce the footprint of the machine equipment. At the same time, the precise control of the turntable 4 can improve the consistency of the product, reduce errors, and ensure that the blowing effect of each preform is more uniform. Of course, the turntable 4 can enable multiple molds to operate simultaneously (that is, multiple sets of forming molds 2 and blowing assemblies 3 are correspondingly arranged on the turntable 4), which increases production while avoiding the energy waste caused by repeated starts and stops. The precise control of the turntable 4 drive can more efficiently distribute energy, reduce power consumption, and bring higher energy utilization.

[0043] Optionally, the first mold 21 and the second mold 22 are rotatably connected, that is, along the radial direction of the turntable 4, the first mold 21 has a first end and a second end, and the second mold 22 has a third end and a fourth end. The driving member can adopt a motor, a rotary cylinder and other structures. In this embodiment, a motor is used to drive the first end and the third end to be rotatably connected, so that the second end and the fourth end move away from each other to open the mold cavity, or move closer to each other to close the mold cavity. The structure that uses the motor to cooperate with the rotation of the first mold 21 and the second mold 22 occupies less space and has a compact structure compared to the structure that moves horizontally along a straight line.

[0044] Furthermore, if Figure 3 、 Figure 4 and Figure 7As shown, the bottle blowing machine further includes an upper guide rail 5 provided on the frame 1, and the upper guide rail 5 is located above the forming mold 2. The length of the upper guide rail 5 extends along the rotation direction of the turntable 4. Along the rotation direction of the turntable 4, the top side of the upper guide rail 5 has a horizontally arranged first step surface 51 and a second step surface 52. The height D1 of the first step surface 51 is lower than the height D2 of the second step surface 52, and the first step surface 51 and the second step surface 52 are connected through a first inclined surface. The blowing assembly 3 further includes a first bracket 33. The first bracket 33 It is arranged on the turntable 4, and the length of the first bracket 33 extends in the vertical direction. The head 31 is slidably connected to the first bracket 33. When the head 31 slides on the first step surface 51, the head 31 is inserted into the bottle mouth 101. The head 31 can slide along the first step surface 51 and the first inclined surface to the second step surface 52. When the head 31 slides on the first step surface 51 and the first inclined surface, the head 31 is inserted into the bottle mouth 101. When the head 31 slides to the second step surface 52, the head 31 is separated from the bottle mouth 101.

[0045] The rotation of the turntable 4 and the arrangement of stepped surfaces of varying heights on the upper guide rail 5 allow the sealing head 31 to slide between the first stepped surface 51 and the second stepped surface 52, thereby precisely controlling the contact and separation of the sealing head 31 from the bottle mouth 101. This effectively achieves control over the sealing or separation of the bottle mouth, ensuring the sealing performance and production accuracy of the bottle 100 during the blow molding process. The first inclined surface connects the two stepped surfaces, allowing the sealing head 31 to transition smoothly, avoiding sudden jumps, sudden changes, or jamming that could cause equipment wear or bottle mouth rupture, thereby improving the stability and service life of the equipment and the production quality of the bottle 100. In other embodiments, in addition to providing an upper guide rail 5 with stepped surfaces of varying heights, a linear drive structure such as a pneumatic cylinder, hydraulic cylinder, or electric cylinder can also be used to drive the movement of the sealing head 31 in the vertical direction. Of course, through the setting of the upper guide rail 5, especially when multiple sets of forming molds 2 and blowing assemblies 3 are set on the turntable 4, the heads 31 of multiple blowing assemblies 3 can all use the same upper guide rail 5 to achieve vertical movement, effectively reducing the setting of the drive structure and the entanglement of its wiring harness, with a simple structure and high economic benefits.

[0046] Preferably, if Figure 3 、 Figure 7 、 Figure 9 and Figure 10As shown, the head 31 includes a mounting portion 311 and a plug-in portion 312. The mounting portion 311 is slidably set on the first bracket 33. The plug-in portion 312 is protruding from the bottom side of the mounting portion 311. The top side of the upper guide rail 5 also includes a horizontally arranged third step surface 53. Along the rotation direction of the turntable 4, the third step surface 53 is located between the first step surface 51 and the second step surface 52. The height of the third step surface 53 is D3, D1<D3<D2, and the first step surface 51 and the second step surface 52, and the second step surface 52 and the third step surface 53 are all connected by a first inclined surface. When the head 31 is slidably set on the third step surface 53, the plug-in portion 312 is partially inserted into the bottle mouth portion 101, and the mounting portion 311 and the bottle mouth portion 101 are spaced apart. The outer periphery of the bottle mouth portion 101 can be clamped and unloaded by an external manipulator. The installation portion 311 strengthens the seal between the end cap 31 and the top side of the bottle mouth 101, further strengthening the seal between the end cap 31 and the bottle mouth 101 on top of the seal between the insertion portion 312 and the inner sidewall of the bottle mouth 101. The third step surface 53 allows the end cap 31 to be slightly raised to a certain height after the bottle 100 is blown. However, the insertion portion 312 remains partially inserted into the bottle mouth 101 to restrain the bottle 100. The installation portion 311 is only separated from the bottle mouth 101 by a sufficient space for an external robot to grasp it, preventing the robot from contacting and interfering with the end cap 31 and being unable to grasp the bottle mouth 101.

[0047] Furthermore, if Figure 3 and Figure 7 As shown, the upper guide rail 5 is a first curved guide rail, the center of which coincides with the rotation center of the turntable 4. A first limit portion is provided on the first bracket 33, and a second limit portion is provided on the head 31. When the head 31 is separated from the first curved guide rail, the second limit portion moves downward in the vertical direction and stops on the first limit portion, and the head 31 is inserted into the bottle mouth portion 101. The provision of the curved guide rail can reduce the input of materials for the upper guide rail 5 and reduce production costs. When the head 31 is separated from the first curved guide rail, that is, after the head 31 slides out from the second step surface 52, the head 31 is inserted into the bottle mouth portion 101. At this time, the head 31 is abutted against the bottle mouth portion 101 by the deadweight of the head 31.

[0048] In this embodiment, if Figure 3 and Figure 6As shown, the end cap 31 is mounted on a connecting rod 37, which is slidably mounted on a first bracket 33 in a vertical direction. A first roller 34 is rotatably connected to the connecting rod 37, and the first roller 34 is slidably connected to the upper guide rail 5. That is, the end cap 31 is slidably connected to the upper guide rail 5 via the first roller 34 on the connecting rod 37. The roller has low friction loss and is durable. The blow piece 32 is fixedly mounted on the first bracket 33, and a mounting opening is vertically provided through the blow piece 32. The connecting rod 37 is slidably connected to the mounting opening. The first roller 34 is located above the blow piece 32, and the end cap 31 is located below the blow piece 32. As the first roller 34 slides along the upper guide rail 5, it drags the connecting rod 37, driving the end cap 31 up and down, thereby connecting or separating the end cap 31 from the blow piece 32. Specifically, the second limiting portion 36 is arranged on the connecting rod 37 and is adjacent to the first roller 34. The first limiting portion 35 is arranged on the top side of the blowing member 32. When the first roller 34 is separated from the upper guide rail 5, the second limiting portion 36 slides downward and stops on the first limiting portion 35.

[0049] Of course, in order to ensure that the roller can be connected to the first step surface 51 as the turntable 4 rotates after it detaches from the second step surface 52, the first limit part and the second limit part cooperate to limit the height of the head 31 and the first roller 34 after they detach from the second step surface 52, thereby improving the smoothness of the first roller 34 when it is connected to the first step surface 51 again and reducing the impact of jamming or collision.

[0050] In addition, in order to ensure that the head 31 can be smoothly inserted into the bottle mouth 101 after the first roller 34 is separated from the second step surface 52, a third inclined surface is further provided at the end of the second step surface 52 away from the first step surface 51 along the rotation direction of the turntable 4. The third inclined surface is inclined downward so that the roller can gradually move downward along the third inclined surface, and the head 31 can be gradually inserted into the bottle mouth 101, thereby avoiding the situation where the head 31 falls directly from a high place and damages the bottle mouth 101 or the insertion accuracy is low.

[0051] In other embodiments, Figure 3 、 Figure 5 and Figure 8As shown, the bottle blowing machine also includes a lower guide rail 6 provided on the frame 1, and the lower guide rail 6 is located below the forming mold 2. The length of the lower guide rail 6 extends along the rotation direction of the turntable 4. Along the rotation direction of the turntable 4, the top side of the lower guide rail 6 has a horizontally arranged fourth step surface 61, a fifth step surface 62 and a sixth step surface 63. The height D4 of the fourth step surface 61 is equal to the height D6 of the sixth step surface 63, and the height D5 of the fifth step surface 62 is lower than the height D4 of the fourth step surface 61. The fourth step surface 61 and the fifth step surface 62, as well as the fifth step surface 62 and the sixth step surface 63 are connected by a second inclined surface respectively, forming The mold 2 also includes a second bracket 27, which is slidably set on the turntable 4 in the vertical direction. The bottom mold 23 is set on the second bracket 27. The end of the second bracket 27 away from the bottom mold 23 can be slidably connected to the lower guide rail 6. After the first mold 21 and the second mold 22 demold the bottle 100, the end of the second bracket 27 away from the bottom mold 23 slides from the fourth step surface 61 to the fifth step surface 62. When the end of the second bracket 27 away from the bottom mold 23 is slidably set on the fifth step surface 62, the bottle blank is loaded. After the bottle blank is loaded, the end of the second bracket 27 away from the bottom mold 23 slides from the fifth step surface 62 to the sixth step surface 63.

[0052] It is understandable that, in combination with the rotation of the turntable 4 and the setting of the step surfaces of different heights of the lower guide rail 6, the second bracket 27 can drive the bottom mold 23 to slide along the lower guide rail 6, thereby realizing up and down movement in the vertical direction. The different step surfaces and inclined surface structures set can effectively guide the precise sliding of the second bracket 27 after demolding and the mold closing process to be more accurate and efficient, avoiding the problem of inaccurate or unstable alignment, thereby improving production efficiency and product quality. By setting the second inclined surface, the second bracket 27 can make a smooth transition during the sliding process, reducing the problem of equipment wear due to sudden changes or excessive friction, thereby improving the stability of the equipment and the durability of long-term operation. In other embodiments, in addition to setting the lower guide rail 6 with step surfaces of different heights, the second bracket 27 and the bottom mold 23 can also be driven in the vertical direction by a linear drive structure such as a cylinder, oil cylinder or electric cylinder. Of course, through the setting of the lower guide rail 6, especially when multiple groups of forming molds 2 are set on the turntable 4, multiple bottom molds 23 can use the same lower guide rail 6 to achieve vertical movement, effectively reducing the setting of the drive structure and the entanglement of its wiring harness, with a simple structure and high economic benefits.

[0053] Furthermore, the lower guide rail 6 is a second curved guide rail, the center of which coincides with the rotation center of the turntable 4. The bottom mold 23 includes a fixing portion 231 and a supporting portion 232. The fixing portion 231 is disposed at the end of the second bracket 27 away from the second curved guide rail. The supporting portion 232 is disposed on the top side of the fixing portion 231. The supporting portion 232 is used to support the bottle preform to form a bottom depression. One of the outer peripheral wall of the fixing portion 231 and the cavity wall of the communication port 26 is provided with a snap-fitting portion, and the other is provided with a snap-fitting groove. When the second bracket 27 is separated from the second curved guide rail, the snap-fitting portion snaps into the snap-fitting groove. The provision of the curved guide rail can reduce the material input of the lower guide rail 6 and lower production costs. When the bottom mold 23 is separated from the first curved guide rail, that is, after the bottom mold 23 slides out of the sixth step surface 63, the snap-fitting portion snaps into the snap-fitting groove, and the first mold 21, the second mold 22, and the bottom film are in a stable connection. In this embodiment, the second bracket 27 is slidably connected to the lower guide rail 6 via the second roller 7 , and the roller has low friction loss and is durable.

[0054] Furthermore, the molding die 2 further includes springs 28 extending vertically. Multiple springs 28 are disposed between the turntable 4 and the second bracket 27. The springs 28 constantly push the second bracket 27 toward the end away from the bottom mold 23, thereby securing the second bracket 27 against the lower guide rail 6. Due to the provision of the springs 28, after the bottle 100 is separated from the first mold 21 and the second mold 22, the second roller 7 at the bottom of the second bracket 27 slides from the fourth step surface 61 to the fifth step surface 62, separating the bottom mold 23 from the bottle 100. The springs 28 push the second bracket 27 to move the bottom mold 23 away from the bottle 100, ensuring smooth separation of the bottom mold 23 from the bottle 100. This prevents the bottom mold 23 from adhering to the bottle bottom due to insufficient weight, thereby improving the yield rate of demolding the bottle 100 from the bottom mold 23.

[0055] like Figures 1 to 10As shown, the specific operation conditions are as follows: in the loading state, the first mold 21 and the second mold 22 are opened. At this time, the first roller 34 is located on the second step surface 52, and the second roller 7 is located on the fifth step surface 62. The external manipulator clamps the preform and places it between the first mold 21 and the second mold 22. The turntable 4 continues to rotate to drive the second roller 7 to slide from the fifth step surface 62 to the sixth step surface 63. Then the motor drives the first mold 21 and the second mold 22 to close, so as to clamp the bottle mouth 101 in the placement port 25 and clamp the bottom mold 23 at the communicating port 26. Then the external manipulator separates from the bottle mouth 101, and the first roller 34 is separated from the upper guide rail 5 by the second step surface 52, and the first limiting portion and the second limiting portion cooperate to limit the height of the head 31. At the same time, the second roller 7 is separated from the lower guide rail 6 by the sixth step surface 63, and the bottle is blown. The pneumatic component 32 blows air into the preform through the sealing head 31, causing the preform to expand and adhere tightly to the inner wall of the mold. After cooling, the preform rotates with the turntable 4, so that the first roller 34 can connect to the first step surface 51 and the second roller 7 connects to the fourth step surface 61. Then, the first roller 34 rises along the first step surface 51 to the third step surface 53, and the second roller 7 remains on the fourth step surface 61. The external robot clamps the bottle mouth 101, and then the motor drives the first mold 21 and the second mold 22 to open to separate the formed bottle 100 from the mold. Then, the first roller 34 slides along the third step surface 53 to the second step surface 52, and the second roller 7 slides from the fourth step surface 61 to the fifth step surface 62, so that the sealing head 31 and the bottom mold 23 are respectively separated from the upper and lower ends of the bottle 100. This reciprocating motion realizes continuous production of the bottle 100.

[0056] The embodiment of the present invention also provides an operating method of a bottle blowing machine, such as Figures 1 to 10 As shown, the bottle blowing machine using any of the above embodiments includes the following steps:

[0057] S10, mold opening operation: Start the bottle blowing machine so that the driving member of the forming mold 2 drives the first mold 21 and the second mold 22 to move away from each other to open the mold cavity, and the bottom mold 23 of the forming mold 2 and the head 31 of the blowing assembly 3 move away from each other on both sides in the vertical direction;

[0058] S20, loading operation: The bottle blank is clamped between the first mold 21 and the second mold 22 by an external manipulator. The bottom mold 23 is moved vertically to a specified position. The driving member drives the first mold 21 and the second mold 22 to move closer together and close the mold cavity. The bottle body of the bottle blank is positioned in the mold cavity, and the bottle mouth 101 of the bottle blank is clamped in the placement opening 25 on the top side of the forming mold 2.

[0059] S30, bottle blowing operation: the external manipulator is released and moves away from the bottle mouth 101, the sealing head 31 moves vertically toward the forming mold 2 and is inserted into the bottle mouth 101, and the blowing member 32 of the blowing assembly 3 blows the preform, introducing gas into the preform to form the bottle 100;

[0060] S40, blanking operation: keep the end cap 31 inserted in the bottle mouth 101 and the bottom mold 23 pressed against the bottom of the bottle 100, use the external manipulator to clamp the bottle mouth 101, and use the driving member to drive the first mold 21 and the second mold 22 away from each other to open the mold cavity, then separate the bottom mold 23 and the end cap 31 from the bottle 100 in the vertical direction, and the external manipulator unloads the bottle 100.

[0061] The method is simple to operate and can utilize the bottom mold 23 provided to ensure the structural and supporting stability of the bottle 100 and to form a concave bottle bottom supporting the bottle blank, as well as the sealing head 31 for sealing and limiting the bottle mouth 101, to respectively limit the upper and lower ends of the bottle 100, so that the relative position of the bottle 100 can be limited when the bottle 100 is demolded and separated from the first mold 21 and the second mold 22, thereby preventing the bottle 100 from adhering to the first mold 21 or the second mold 22 and following the movement, thereby improving the convenience of demolding the bottle 100, ensuring the production qualification rate of the bottle 100, and avoiding the situation where the bottle 100 adheres to the mold and requires the intervention of the operator to remove the bottle 100, thereby improving the operating safety of the operator.

[0062] Furthermore, in step S40, before the external robot grips the bottle mouth 101, the end cap 31 is vertically moved away from the bottle 100 by a specified distance, keeping the end cap 31 partially inserted in the bottle mouth 101 and providing a space for the external robot to grip. Because the bottle mouth 101 is relatively short, to ensure that the external robot grips the bottle mouth 101, before the bottle 100 is demolded from the first mold 21 and the second mold 22, the end cap 31 is first raised by a specified distance to facilitate the external robot grip, reduce interference between the external robot and the end cap 31, and improve the convenience of demolding the bottle 100.

[0063] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A bottle blowing machine, characterized in that: include: frame; The molding die is provided on the frame, and the molding die comprises a first mold, a second mold, a bottom mold and a driving member, wherein both sides of the first mold and the second mold adjacent to each other are recessed with placement grooves, and the two placement grooves enclose a mold cavity for accommodating a bottle blank, and a placement opening communicating with the mold cavity is provided on the top side of the molding die, and the driving member can drive the first mold and the second mold to rotate toward each other to open or close the mold cavity, and the bottle mouth portion of the bottle blank can be clamped at the placement opening, and the bottle mouth portion partially extends outside the placement opening, and a communication opening communicating with the mold cavity is provided on the bottom side of the molding die, and the bottom mold is slidably provided in the vertical direction and can be selectively locked, and the bottom mold is used to block the communication opening, and at least a portion of the bottom mold protrudes toward the mold cavity; a blow assembly comprising a sealing head and a blowing member, wherein the sealing head is located above the forming mold, the sealing head is slidably arranged along the vertical direction and can be selectively locked, the sealing head can be clamped on the inner side wall of the bottle mouth, and the blowing member is connected to the interior of the bottle blank through the sealing head; When the driving member drives the first mold to separate from the second mold, the sealing head and the bottom mold respectively define the upper and lower ends of the bottle after the bottle blank is formed.

2. The bottle blowing machine according to claim 1, characterized in that: The bottle blowing machine also includes a turntable, which is arranged on the frame, the forming mold is arranged on the turntable and adjacent to the outer edge of the turntable, the bottom mold and the head are respectively slidably arranged on the turntable, and the turntable can drive the forming mold and the blowing assembly to rotate around the central axis of rotation of the turntable.

3. The bottle blowing machine according to claim 2, characterized in that: The bottle blowing machine also includes an upper guide rail arranged on the frame, and the upper guide rail is located above the forming mold, the length of the upper guide rail extends along the rotation direction of the turntable, and along the rotation direction of the turntable, the top side of the upper guide rail has a first step surface and a second step surface arranged horizontally, the height D1 of the first step surface is lower than the height D2 of the second step surface, and the first step surface and the second step surface are connected through a first inclined surface, the blowing assembly also includes a first bracket, the first bracket is arranged on the turntable, and the length of the first bracket extends along the vertical direction, the head is slidably connected to the first bracket, when the head slides on the first step surface, the head is inserted into the bottle mouth part, the head can slide along the first step surface and the first inclined surface to the second step surface, when the head slides on the first step surface and the first inclined surface, the head is inserted into the bottle mouth part, and when the head slides to the second step surface, the head is separated from the bottle mouth part.

4. The bottle blowing machine according to claim 3, characterized in that: The head includes a mounting portion and a plug-in portion, the mounting portion is slidably arranged on the first bracket, the plug-in portion is protruding from the bottom side of the mounting portion, and the top side of the upper guide rail also includes a horizontally arranged third step surface, along the rotation direction of the turntable, the third step surface is located between the first step surface and the second step surface, the height of the third step surface is D3, D1<D3<D2, the first step surface and the second step surface, and the second step surface and the third step surface are all connected by the first inclined surface, when the head is slidably arranged on the third step surface, the plug-in portion is partially inserted into the bottle mouth portion, the mounting portion and the bottle mouth portion are spaced apart, and the outer periphery of the bottle mouth portion can be used for an external manipulator to clamp and cut materials.

5. The bottle blowing machine according to claim 3, characterized in that: The upper guide rail is a first arc-shaped guide rail, the center of which coincides with the rotation center of the turntable. A first limiting portion is provided on the first bracket, and a second limiting portion is provided on the head. When the head is separated from the first arc-shaped guide rail, the second limiting portion moves downward along the vertical direction and stops on the first limiting portion, and the head is inserted into the bottle mouth.

6. The bottle blowing machine according to claim 2, characterized in that: The bottle blowing machine also includes a lower guide rail arranged on the frame, and the lower guide rail is located below the forming mold, the length of the lower guide rail extends along the rotation direction of the turntable, and along the rotation direction of the turntable, the top side of the lower guide rail has a horizontally arranged fourth step surface, a fifth step surface and a sixth step surface, the height D4 of the fourth step surface is equal to the height D6 of the sixth step surface, the height D5 of the fifth step surface is lower than the height D4 of the fourth step surface, the fourth step surface and the fifth step surface, and the fifth step surface and the sixth step surface are respectively connected by a second inclined surface, and the forming The mold also includes a second bracket, which is slidably arranged on the turntable along the vertical direction, and the bottom mold is arranged on the second bracket. The end of the second bracket away from the bottom mold can be slidably connected to the lower guide rail. After the first mold and the second mold demold the bottle, the end of the second bracket away from the bottom mold slides from the fourth step surface to the fifth step surface. When the end of the second bracket away from the bottom mold is slidably arranged on the fifth step surface, the bottle blank is loaded. After the bottle blank is loaded, the end of the second bracket away from the bottom mold slides from the fifth step surface to the sixth step surface.

7. The bottle blowing machine according to claim 6, characterized in that: The lower guide rail is a second arc-shaped guide rail, and the center of the second arc-shaped guide rail coincides with the rotation center of the turntable. The bottom mold includes a fixing part and a supporting part. The fixing part is provided at the end of the second bracket away from the second arc-shaped guide rail. The supporting part is provided on the top side of the fixing part. The supporting part is used to support the bottle blank to form a depression in the bottom of the bottle. One of the outer peripheral wall of the fixing part and the cavity wall of the communicating port is provided with a clamping part, and the other is provided with a clamping groove. When the second bracket is separated from the second arc-shaped guide rail, the clamping part is clamped in the clamping groove.

8. The bottle blowing machine according to claim 7, characterized in that: The forming mold further includes a spring. A plurality of the springs are provided between the turntable and the second bracket. The springs always push the second bracket to move toward the end away from the bottom mold so that the second bracket is pressed tightly against the lower guide rail.

9. A method for operating a bottle blowing machine, characterized in that: The bottle blowing machine according to any one of claims 1 to 8 comprises the following steps: S10, mold opening operation: starting the bottle blowing machine so that the driving member of the forming mold drives the first mold and the second mold to move away from each other to open the mold cavity, and the bottom mold of the forming mold and the head of the blowing assembly move away from each other on both sides in the vertical direction; S20, loading operation: using an external manipulator to clamp the bottle blank between the first mold and the second mold, the bottom mold is moved to a specified position along the vertical direction, and the driving member drives the first mold and the second mold to move closer together to close the mold cavity, so that the bottle body of the bottle blank is located in the mold cavity and the bottle mouth of the bottle blank is clamped in the placement opening on the top side of the forming mold; S30, bottle blowing operation: the external manipulator is released and moves away from the bottle mouth, the sealing head moves vertically toward the forming mold and is inserted into the bottle mouth, and the blowing parts of the blowing assembly blow the bottle blank to introduce gas into the bottle blank to form a bottle; S40, blanking operation: keep the end cap inserted in the bottle mouth and the bottom mold pressed against the bottom of the bottle, use the external manipulator to clamp the bottle mouth, drive the first mold and the second mold to move away from each other by the driving member to open the mold cavity, then separate the bottom mold and the end cap from the bottle along the vertical direction, and the external manipulator unloads the bottle.

10. The operating method of the bottle blowing machine according to claim 9, characterized in that: In step S40, before the external manipulator clamps the bottle mouth, the head is moved away from the bottle by a specified distance along the vertical direction, the head portion is kept inserted in the bottle mouth, and a spacing space is provided for the external manipulator to clamp.

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