Bottle blowing machine with limiting assembly

Abstract

The present application relates to a kind of bottle blowing machine with limiting assembly.The existing bottle blowing machine opening and closing mold structure needs larger axial installation space, affect use.The present application includes rack, and the rack is equipped with opening and closing mold structure, and the opening and closing mold structure includes two limiting working surface, and limiting assembly and mold assembly are equipped between the limiting working surface, when mold assembly is closed to closing station by opening station axis, limiting assembly is moved to card station from idle station, to make limiting working surface pass through limiting assembly and axially clamp mold assembly.Limiting assembly can be avoided by setting between limiting working surface and opening and closing mold, limiting assembly can form active space by giving way, also can axially clamp mold assembly, both improve applicability, facilitate installation in smaller installation space, also simplify assembly and maintenance difficulty, reduce maintenance cost, reduce raw material usage, reduce raw material cost and transportation cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of plastic processing, in particular to a bottle blowing machine. BACKGROUND

[0002] The existing bottle blowing machine comprises a rack, a conveying mechanism arranged on the rack, and a heating mechanism and a bottle blowing mechanism arranged in sequence along the conveying mechanism. The bottle blowing mechanism comprises an open-close mold structure and a blowing structure for blowing bottles. In operation, the bottle preform is conveyed by the conveying mechanism and sequentially passes through the heating mechanism and the bottle blowing mechanism for processing. The heating mechanism softens the bottle preform, the blowing structure blows the bottle preform, and the open-close mold structure shapes the blown bottle preform to change it into a preset profile.

[0003] The existing open-close mold structure comprises two parallel and spaced positioning plates, a mold assembly arranged between the positioning plates, an open-close driving assembly for driving the mold assembly to open and close, and a pressurized locking assembly arranged between the positioning plates and the mold assembly. The mold assembly comprises two plates that can open and close towards each other, and a mold plate fixed to the facing surfaces of the plates. The positioning plates and the plates are arranged in parallel. A plurality of guide rods are arranged across the positioning plates and are parallel to each other. The plates are slidably sleeved on the guide rods. The open-close driving assembly is arranged between the facing surfaces of the adjacent plates and the positioning plates. The pressurized locking assembly comprises a limiting rod fixed to the side of the plate facing the adjacent positioning plate, and a pressurized positioning piece arranged on the positioning plate. The limiting rod has a positioning notch. When the open-close driving assembly drives the plate to slide along the guide rod and switch from the mold opening station to the mold closing station, the pressurized positioning piece is clamped into the positioning notch, ensuring that the mold plate is tightly fitted and forms a mold cavity for blowing bottles. In this structure, the guide rods not only limit the distance between the positioning plates, but also guide the movement of the plates. The limiting rod also clamps the mold.

[0004] The existing open-close mold structure has the following defects: the inner end of the limiting rod is fixed to the back surface of the plate. When the mold assembly switches to the mold opening station, the outer end of the limiting rod will axially pass through the positioning plate and move outward, requiring a larger axial movement distance for the open-close mold structure.

[0005] The mold plate needs to be fixedly installed on the rack through the plate, resulting in a larger axial thickness of the mold assembly.

[0006] The open-close driving assembly is arranged between the plate and the positioning plate. When setting the distance between the positioning plates, not only does it need to reserve a space for the movement of the plate, but also it needs to reserve a space for the installation of the open-close driving assembly, resulting in a larger distance between the positioning plates.

[0007] Since the open-close driving assembly is axially coincident with the plate, multiple mold assemblies cannot be arranged axially along the plate on the rack, and the number of mold cavities cannot be increased to improve the bottle blowing efficiency.

[0008] The guide rod needs to increase in diameter to improve structural strength to achieve preset functions;

[0009] In summary, the existing open-close die structure has a large axial size and needs a large installation space, which not only increases the use of raw materials and the cost of raw materials and transportation, but also increases the assembly and maintenance difficulty due to the complex structure and large weight of the components, and has a high requirement for the installation space, thereby limiting the installation and use of the device in a small workshop, and affecting the applicability of the equipment. SUMMARY

[0010] In order to solve the problems of the prior art, the present application provides a bottle blowing machine with a limiting assembly, which is arranged between the limiting working surfaces and can avoid the opening and closing of the mold assembly, effectively reducing the axial size of the open-close die structure, reducing the amount of raw materials, facilitating assembly and maintenance, and reducing the requirement for installation space.

[0011] The present application is implemented in the following way: a bottle blowing machine with a limiting assembly, comprising a rack, a conveying mechanism, a heating mechanism and a bottle blowing mechanism are arranged on the rack, the bottle blowing mechanism comprises an open-close die structure and a blowing structure, the open-close die structure comprises two limiting working surfaces arranged in parallel along the axial line, a limiting assembly and a mold assembly are arranged between the limiting working surfaces along the axial direction, when the mold assembly is axially closed from the mold opening station to the mold closing station, the limiting assembly is moved from the idle station axially projected from the mold assembly to the clamping station axially coinciding with the mold assembly, so that the limiting working surface is axially clamped on the mold assembly in the mold closing station. The limiting rod originally fixed with the mold assembly is improved into a movable limiting assembly, the limiting assembly in the clamping station can cooperate with the limiting working surface to clamp the mold assembly, the limiting assembly in the idle station can form a movable space for the opening and closing of the mold assembly by retreating, when the mold assembly is switched to the mold opening station, the limiting assembly will not axially exceed the region between the limiting working surfaces, which effectively reduces the axial space required by the open-close die structure during operation, improves the applicability by reducing the requirement for installation space, facilitates installation in a smaller installation space, and simplifies the structure by eliminating the guide rod and limiting rod in the original structure, thereby simplifying the assembly and maintenance difficulty, reducing the maintenance cost, reducing the amount of raw materials, and reducing the cost of raw materials and transportation. The limiting assembly arranged between the limiting working surfaces can avoid the opening and closing of the mold assembly, the limiting assembly can provide the movable space required for the mold assembly to switch to the mold opening station by retreating to the limiting station, and can cooperate with the limiting working surface to axially clamp the mold assembly in the mold closing station by inserting into the clamping station.

[0012] As preferred, the mold assembly comprises two parallel arranged mold plates which can be opened and closed along the axial direction, and the limiting assembly is switched from the working position to the idle position to form a moving space for the axial displacement of the mold plates between the mold assembly and the limiting working surface. The limiting assembly is switched to the idle position so that the limiting assembly is arranged axially offset from the mold plates to provide the required moving space for the opening of the mold plates, and to ensure that the mold plates can complete the opening and closing actions in the moving space formed after the limiting assembly retreats to the idle position.

[0013] As preferred, the limiting assembly is at least two groups and is arranged on the two axial sides of the mold assembly to enable the limiting working surface to clamp the mold assembly through the corresponding limiting assembly. Since the two mold plates in the mold assembly need to be moved towards or away from each other to switch between the opening position and the closing position, the two mold plates of the mold assembly are each provided with a corresponding limiting assembly to ensure that each mold plate has a corresponding moving space, which not only ensures the smooth opening and closing of the mold assembly, but also enables the precise positioning of each mold plate by the limiting assembly to ensure that the mold assembly is stably positioned on the closing position.

[0014] As preferred, the axial length of the limiting assembly is not less than the axial opening and closing distance of the corresponding mold plate, and the limiting assembly is clamped between the adjacent limiting working surface and the mold assembly. By setting the axial length of the limiting assembly, the axial distance of the moving space is ensured to meet the requirements of the opening and closing actions of the mold plate, to ensure that the limiting working surface does not hinder the switching of the mold assembly from the closing position to the opening position, and to ensure that the mold plates are separated and form a product taking and placing channel.

[0015] As preferred, the machine frame is provided with a guide rail for guiding the opening and closing of the mold plates, and the guide rail and the limiting working surface are arranged in parallel along the axial direction. During the movement of the mold plates, the axis of the mold plates always remains parallel to the axis of the limiting working surface, thereby ensuring that the mold plates can be accurately matched and combined to form a mold cavity for blowing under the assistance of the limiting assembly. The guide rail serves to support the mold plates and guide the movement of the mold plates.

[0016] As preferred, the frame is provided with an opening and closing driving assembly axially misaligned with the axial projection of the mold assembly, the outer peripheral wall of the mold plate extends outward to form a linkage block, the opening and closing driving assembly drives the mold plate to move through the linkage block to switch the mold assembly between the mold opening station and the mold closing station. The opening and closing driving assembly is axially misaligned with the axial projection of the mold assembly, and the opening and closing driving assembly does not hinder the opening and closing of the mold plate. When setting the distance between the limiting working surfaces, no installation space needs to be reserved for the installation of the opening and closing driving assembly, so that the opening and closing mold structure can further reduce the axial distance between the limiting working surfaces. The opening and closing driving assembly directly drives the mold plate to move through the linkage block, which eliminates the mold plate in the original structure. By reducing the axial size of the mold assembly, the distance between the limiting working surfaces is reduced, thereby reducing the size of the opening and closing mold structure. The linkage block and the mold plate are axially misaligned, which effectively avoids the situation that the linkage block hinders the opening and closing of the mold plate. In addition, since the opening and closing driving assembly is axially misaligned with the axial projection of the mold assembly, the frame can be provided with multiple sets of mold assemblies whose axial projections coincide in the limited axial space. By increasing the number of mold cavities, the bottle blowing efficiency and yield are improved. The opening and closing driving assembly only serves to drive the opening and closing of the mold assembly, and does not need to bear the limiting function of the mold assembly. The structural strength requirement of the opening and closing driving assembly is effectively reduced, and then the rod diameter size of the opening and closing driving assembly is reduced to reduce the raw material consumption and production cost.

[0017] As preferred, the limiting assembly includes at least one limiting piece. When the limiting assembly moves to the clamping station, the axial projection of the limiting piece is arranged in a central symmetric manner. By increasing the number of limiting pieces, it is ensured that the distance between the corresponding regions of the facing mold plate back surface and the limiting working surface is the same. The flat limiting working surface is used to apply balanced axial force to each region of the mold plate back surface, thereby ensuring that the mold plate is tightly fitted and improving the mold cavity splicing precision. When there are two or more limiting pieces, the axes of the limiting pieces are parallel to each other, ensuring that the axial force is uniformly transmitted.

[0018] As preferred, the limiting piece is columnar and includes two end faces parallel to and coaxially arranged with each other, so that the limiting piece in the clamping station is axially tightly clamped. One end face of the limiting piece is tightly fitted with the limiting working surface, and the other end face is tightly fitted with the back surface of the mold plate. By increasing the contact area, it is ensured that the axial force is stably transmitted, thereby ensuring that the mold assembly is stably clamped and positioned at the mold closing station.

[0019] As preferred, the limiting assembly is installed on the rack through a limiting driving assembly, so that the limiting assembly moves in the radial plane through the limiting driving assembly and switches between the idle station and the clamping station. The axial projection of the limiting driving assembly is arranged in a staggered manner with the mold assembly to avoid interference with the opening and closing action of the mold assembly. By moving in the radial plane, the limiting assembly adopts a straight path, shortens the movement distance of each limiting piece, effectively reduces the size of the limiting driving assembly, and also improves the switching stability and switching speed of the limiting piece between different stations, thereby shortening the time required for single processing of the bottle blowing mechanism and improving the yield.

[0020] As preferred, the mold assembly is at least two groups and is arranged at an axial distance, and a limiting assembly is arranged between adjacent mold assemblies to axially clamp each mold assembly through the limiting assembly. The mold assembly is arranged in a spaced manner between the limiting working surface, and the number of mold assemblies is increased to increase the number of bottle blank processing of the bottle blowing mechanism in a single run, thereby improving the yield. The adjacent mold assemblies are provided with a movement space for opening and closing the corresponding mold plate. When the mold assembly switches to the clamping station, the corresponding limiting assembly is inserted between the corresponding mold plate back surfaces of the adjacent mold assemblies, so that the adjacent mold assemblies transmit axial force through the limiting assembly, thereby ensuring that each mold assembly can be stably positioned in the clamping station and ensuring product quality.

[0021] As preferred, a pressurizing locking assembly is arranged between the limiting working surfaces, and the pressurizing locking assembly is axially elongated from a deflated state to a pressurized state to axially clamp the mold assembly in the clamping station and the limiting assembly in the clamping station between the limiting working surfaces. In order to facilitate the radial insertion of the limiting assembly into the movement space, the axial length of the movement space is usually greater than the radial length of the limiting assembly, thereby forming an assembly gap for easy assembly. By arranging an axially extendable pressurizing locking assembly to squeeze and eliminate the above assembly gap, the mold assembly is tightly clamped in the clamping station.

[0022] As preferred, the pressurizing locking assembly is arranged between the limiting working surface and the adjacent limiting assembly. The pressurizing locking assembly is arranged on the limiting working surface, and in operation, the axial force generated by the pressurizing locking assembly is transmitted to the mold assembly through the limiting assembly.

[0023] As preferred, the pressurizing locking assembly is arranged between the adjacent limiting assemblies. The pressurizing locking assembly is clamped between the two limiting assemblies, and the axial force generated by the pressurizing locking assembly is transmitted outward through the limiting assemblies on both sides and acts on the mold assembly located between the limiting working surfaces.

[0024] The prominent beneficial effects of the present application: the originally fixed limit rod of the mold assembly is improved into a movable limit assembly, the limit assembly at the clamping station can cooperate with the limit working surface to clamp the mold assembly, the limit assembly at the idle station can form a movable space for the mold assembly to open and close by retreating, when the mold assembly is switched to the mold opening station, the limit assembly will not axially exceed the area between the limit working surfaces, which effectively reduces the axial space required by the mold opening and closing structure during operation, improves the applicability by reducing the requirement for installation space, facilitates installation in a smaller installation space, and also simplifies the structure by eliminating the guide rod, limit rod and other components in the original structure, simplifies the assembly and maintenance difficulty, reduces the maintenance cost, reduces the raw material usage, and reduces the raw material cost and transportation cost. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A partial cross-sectional structure schematic view of the mold assembly in the mold opening station according to the first embodiment;

[0026] Figure 2 A partial cross-sectional structure schematic view of the mold assembly in the mold closing station according to the second embodiment;

[0027] Figure 3 A partial structure schematic view of the mold assembly in the mold opening station according to the third embodiment;

[0028] Figure 4 A partial structure schematic view of the mold assembly in the mold closing station according to the third embodiment;

[0029] Figure 5 A schematic view of the mold opening and closing structure according to the fourth embodiment;

[0030] In the figure: 1, rack, 2, limit working surface, 3, limit assembly, 4, mold assembly, 5, mold plate, 6, mold opening and closing driving assembly, 7, linkage block, 8, limit piece, 9, pressure boosting locking assembly, 10, movable space. DETAILED DESCRIPTION

[0031] The essential features of the present application will be further described below in conjunction with the drawings and specific embodiments.

[0032] Embodiment one:

[0033] The present embodiment provides a bottle blowing machine with a limit assembly.

[0034] As Figure 1The shown bottle blowing machine is composed of a frame 1 and a conveying mechanism, a heating mechanism and a bottle blowing mechanism arranged on the frame 1, the bottle blowing mechanism includes an open-close mold structure and a blowing structure, the open-close mold structure includes two limiting working surfaces 2 arranged in parallel along the same axis, the limiting working surfaces 2 are clamped with a limiting assembly 3 and a mold assembly 4 arranged along the axial direction, when the mold assembly 4 is axially closed from the mold opening position to the mold closing position, the limiting assembly 3 is moved from the idle position axially projected from the mold assembly 4 to the clamping position axially coinciding with the mold assembly 4, so that the limiting working surface 2 axially clamps the mold assembly 4 in the mold closing position through the limiting assembly 3.

[0035] In the embodiment, the conveying mechanism serves to convey the bottle preforms, so that the bottle preforms sequentially undergo the heating, spacing and blowing processes to form finished products. The heating mechanism heats and softens the bottle preforms to improve the blowability of the bottle preforms and ensure that the bottle preforms are blown to form finished products matching the profile of the mold cavity. The blowing mechanism serves to blow and form the bottle preforms, including an open-close mold structure and a blowing structure. Specifically, the open-close mold structure can provide a mold cavity for the bottle preforms to be shaped, and the blowing structure can provide airflow for the bottle preforms to be blown, ensuring that the bottle preforms expand under the action of the air pressure and match and fit the mold cavity side wall.

[0036] In the embodiment, the open-close mold structure includes two positioning plates arranged in parallel and a mold assembly arranged between the positioning plates, the mold assembly includes two corresponding mold plates and mold plates arranged on the facing surfaces of the mold plates, the facing surfaces of the mold plates are provided with mold grooves, the peripheries of the positioning plates are bridged by guide rods, the positioning plates and the mold plates are provided with open-close driving assemblies therebetween, the mold plates are provided with through holes that can be sleeved on the guide rods, so that the mold plates can be moved along the axis of the positioning plates to switch the mold assembly between the mold opening position and the mold closing position under the driving of the open-close driving assemblies, and then the mold grooves are combined to form a mold cavity, the back surfaces of the mold plates are provided with limiting rods, and the mold assembly is axially clamped by the limiting rods when the mold assembly is in the mold closing position. However, the above structure has the following problems: the inner end of the limiting rod is fixed to the back surface of the mold plate, when the mold assembly is switched to the mold opening position, the outer end of the limiting rod will axially pass through the positioning plate and move outward, a larger axial movement distance needs to be reserved for the open-close mold structure, in addition, the open-close driving assemblies are arranged between the mold plates and the positioning plates, when the distance between the positioning plates is set, not only the movement space of 10 for the mold plates needs to be reserved, but also the installation space for the open-close driving assemblies needs to be reserved, resulting in a larger distance between the positioning plates, so that the axial size of the existing open-close mold structure is larger and a larger installation space is needed, which not only increases the use of raw materials and leads to the increase of raw material cost and transportation cost, but also increases the assembly and maintenance difficulty due to the complex structure and the large weight of the components, and has a higher requirement for the installation space, which limits the installation and use of the device in the workshop with smaller space, and affects the applicability of the equipment.

[0037] To this end, the above problems are solved by improving the mold opening and closing structure. Specifically, the mold opening and closing structure comprises two limit working surfaces 2 arranged parallel to each other along the axis, a limit assembly 3 and a mold assembly 4 are arranged between the limit working surfaces 2 along the axial direction, when the mold assembly 4 is axially closed from the mold opening position to the mold closing position, the limit assembly 3 is moved from the idle position axially offset from the axial projection of the mold assembly 4 to the clamping position axially coinciding with the mold assembly 4, so that the limit working surface 2 axially clamps the mold assembly 4 in the mold closing position. The original limit rod fixedly connected with the mold assembly 4 is improved to the movable limit assembly 3, the limit assembly 3 in the clamping position can cooperate with the limit working surface to clamp the mold assembly 4, and the limit assembly 3 in the idle position can form a movable space 10 for the mold assembly 4 to open and close by retreating, when the mold assembly 4 is switched to the mold opening position, the limit assembly 3 will not axially exceed the region between the limit working surfaces 2, which effectively reduces the axial space required by the mold opening and closing structure during operation, improves the applicability by reducing the requirement for installation space, facilitates installation in a smaller installation space, simplifies the structure by eliminating the guide rod and limit rod in the original structure, simplifies the assembly and maintenance difficulty, reduces the maintenance cost, reduces the raw material consumption, and reduces the raw material cost and transportation cost.

[0038] In this embodiment, the relative position between the limit working surfaces 2 is fixed, which ensures that the mold assembly 4 and the limit assembly 3 can be tightly clamped by axial cooperation. In use, when the mold assembly 4 is in the mold closing position, the mold plates 5 are attached to each other, and the limit assembly 3 is inserted into the clamping position between the back surface of the mold plate 5 and the limit working surface 2. At this time, the limit assembly 3 is located on the movement path of the mold assembly 4 to perform the mold opening action, effectively preventing the mold assembly 4 from performing the mold opening action. The limit working surface 2 applies an axial limiting force to the mold assembly 4 through the limit assembly 3, ensuring that the mold plates 5 are stably positioned in the mold closing position, effectively resisting the air pressure acting on the mold cavity when the bottle blank is blown, and ensuring that the bottle blank can be blown to form a predetermined profile. When the bottle body is blown and needs to be opened to take out the bottle, the limit assembly 3 is avoided from the clamping position to the idle position axially offset from the axial projection of the mold assembly 4. At this time, the limit assembly 3 moves away from the movement path of the mold assembly 4 to perform the mold opening action, thereby forming a movable space 10 for the mold assembly 4 to perform the mold opening action. This effectively shortens the distance between the limit working surfaces 2, reduces the axial size of the equipment, and also allows the limit assembly 3 to be improved from axial avoidance to radial avoidance, effectively reducing the installation space of the equipment.

[0039] In this embodiment, when the mold assembly 4 is switched to the mold closing position, the limit assembly 3 can be inserted into the movable space 10 formed after the mold assembly 4 is closed, and can play a role of transmitting an axial limiting force between the limit working surface 2 and the mold assembly 4, ensuring that the mold assembly 4 is stably positioned in the mold closing position. In addition, the limit assembly 3 can move away from the clamping position and provide a mold opening movable space 10 for the mold assembly 4.

[0040] Embodiment two:

[0041] Compared with embodiment one, the embodiment provides a specific bottle blowing machine structure.

[0042] As shown in Figure 2 the mold assembly 4 includes two parallel mold plates 5 which can be opened and closed along the axial direction, and the limiting assembly 3 forms a moving space 10 for the axial displacement of the mold plate 5 between the mold assembly 4 and the limiting working surface 2 when the limiting assembly 3 is switched from the clamping station to the idle station. The film groove is formed on the opposite surface of the mold plate 5, so that the mold plate 5 forms a mold cavity for blowing the bottle body by being pasted together. In use, when the limiting assembly 3 is switched from the clamping station to the idle station, the moving space 10 is formed at the back surface of the mold plate 5 for the axial movement of the mold plate 5, and no structure is arranged in the moving space 10, which ensures the smooth axial movement of the mold plate 5, so that the mold plate 5 moves away from each other and ensures that the mold assembly 4 is switched to the mold opening station.

[0043] In the embodiment, the axial length of the moving space 10 is not less than the required moving distance of the mold plate 5 when the mold assembly 4 is switched from the mold closing station to the mold opening station, and the radial cross-sectional profile of the moving space 10 completely covers the axial projection profile of the mold plate 5, which ensures the smooth movement of the mold plate 5.

[0044] In the embodiment, the locking working surface 2 is provided with a pressurized locking assembly 9 between the two, which is axially extended from a deflated state to a pressurized state, so that the mold assembly 4 in the clamping station and the locking assembly 3 in the clamping station are axially clamped between the locking working surfaces 2. In order to facilitate the switching of the locking assembly 3 from the idle station to the clamping station, the axial length of the active space 10 is usually greater than the axial length of the locking assembly 3, so as to form an assembly gap for the insertion of the locking assembly 3, but this also causes the locking working surface 2 and the corresponding mold plate 5 to be unable to transmit the axial locking force through the locking assembly 3. Therefore, the locking working surface 2 and the back surface of the mold plate 5 are provided with an axially extendable pressurized locking assembly 9. The pressurized locking assembly 9 in the deflated state does not interfere with the active space 10, ensuring that the locking assembly 3 can be smoothly inserted into the clamping station. When the locking assembly 3 is in the clamping station, the pressurized locking assembly 9 is switched from the deflated state to the pressurized state. One end of the pressurized locking assembly 9 abuts against the locking working surface 2, and the other end extends axially and extends into the active space 10 to abut against the end surface of the locking assembly 3 facing the locking working surface 2. At this time, the pressurized locking assembly 9, the mold assembly 4 and the locking assembly 3 arranged on both axial sides of the mold assembly 4 are axially stacked. Since the distance between the locking working surfaces 2 remains unchanged, when the pressurized locking assembly 9 is switched to the pressurized state and the axial length is increased, the mold assembly 4 is subjected to an axial clamping force through the locking assembly 3. The assembly gap is eliminated by axial extrusion to ensure that the locking assembly 3 stably transmits the axial locking force, thereby ensuring that the mold assembly 4 is firmly clamped in the clamping station, effectively resisting the pressure received when the mold cavity blows the bottle, and ensuring the quality of the bottle blowing product.

[0045] In the embodiment, a group of mold assemblies 4 are arranged between the locking working surfaces 2, and locking assemblies 3 are arranged on both sides of the mold assemblies 4. By controlling the switching station of the locking assembly 3, the corresponding active space 10 is provided for each mold plate 5.

[0046] In use, when the mold opening and closing structure is in the idle state, the locking assembly 3 is in the idle station, the mold assembly 4 is in the mold opening station, the mold plate 5 is opened and closed, and the product placing and taking channel is formed between the facing surfaces, and the pressurized locking assembly 9 is in the deflated state.

[0047] In the embodiment, when the bottle blank needs to be processed, the mold is closed by the following steps: first, the bottle blank is moved to the mold groove by the product taking and placing channel under the driving of the conveying mechanism; then, the mold assembly 4 is closed to the closed mold station under the driving of the opening and closing driving assembly 6, the mold groove is closed to form a mold cavity wrapping the bottle blank, and the active space 10 is formed between the back surface of the mold plate 5 and the pressurization locking assembly 9; then, the limiting assembly 3 is switched from the idle station to the clamping station under the driving of the limiting driving assembly, one end of the limiting assembly 3 is coaxially arranged with the pressurization locking assembly 9, and the other end is arranged towards the back surface of the mold plate 5; finally, the pressurization locking assembly 9 is switched from the deflation state to the pressurization state, one end of the pressurization locking assembly 9 is tightly attached to the limiting working surface 2, and the other end is pressed against the back surface of the mold plate 5 through the limiting assembly 3, so that the facing surfaces of the mold plate 5 are tightly attached. After the mold closing operation is realized by the above steps, the bottle body is blown by the bottle blowing mechanism.

[0048] In the embodiment, when the bottle body needs to be taken out, the mold is opened by the following steps: first, the pressurization locking assembly 9 is switched from the pressurization state to the deflation state, so that the assembly gap is formed at both ends of the limiting assembly 3; then, the limiting assembly 3 is driven by the limiting driving assembly to retreat from the clamping station to the idle station, so as to provide the active space 10 for the mold plate 5; then, the mold assembly 4 is switched from the closed mold station to the open mold station under the driving of the opening and closing driving assembly 6, so that the product taking and placing channel is formed between the mold plates 5; finally, the bottle body is taken out. The mold opening operation is realized by the above elbow, and the mold closing and opening actions are cyclically repeated to realize the batch processing of the bottle body.

[0049] In the embodiment, the limiting assembly 3 includes at least one limiting piece 8, and the axial projection of the limiting piece 8 is arranged in a central symmetric manner when the limiting assembly 3 moves to the clamping station. Specifically, the limiting assembly 3 includes four limiting pieces 8, which are symmetrically arranged on the four corners of the back surface of the mold plate 5 with the mold plate 5 axis as the center when the limiting pieces 8 are in the clamping station. The axial clamping force is applied to the four corners of the mold plate 5 to ensure that the mold groove is stably closed to form the mold cavity.

[0050] In the embodiment, the limiting piece 8 is in a columnar shape and includes two end faces arranged in parallel and coaxially, so that the limiting piece 8 in the clamping station is tightly clamped axially. The columnar limiting piece 8 has good axial force transmission effect, which effectively avoids the influence of the deformation of the limiting piece 8 on the closing precision of the mold plate 5. The axial length of the limiting assembly 3 is not less than the axial opening and closing distance of the corresponding mold plate 5. Usually, the axial length of the limiting piece 8 is slightly larger than the distance required for the axial opening and closing of the mold plate 5, which effectively improves the space utilization efficiency and prevents the distance between the limiting working surfaces 2 from increasing due to the excessive length of the limiting piece 8.

[0051] In the embodiment, the radial section of the limiting member 8 can be circular, polygonal, or a combination of curves and straight lines. In addition, the limiting member can be solid or hollow, which should be considered as specific embodiments of the present embodiment.

[0052] In the embodiment, the rack 1 is provided with guide rails for guiding the opening and closing of the mold plate 5, which are arranged in parallel with the axis of the limiting working surface 2. The guide rails are multiple, including a bottom rail arranged below the mold assembly 4 for supporting and a side rail arranged beside the mold assembly 4 for limiting. Specifically, the mold plate 5 slides along the guide rails through the sliding blocks arranged on the outer peripheral wall thereof, ensuring that the mold plate 5 is always arranged in parallel during the opening and closing process, and ensuring the opening and closing accuracy of the mold assembly 4.

[0053] In the embodiment, the rack 1 is provided with an opening and closing driving assembly 6 arranged axially offset from the mold assembly 4. The outer peripheral wall of the mold plate 5 extends outwardly to form a linkage block 7. The opening and closing driving assembly 6 drives the mold plate 5 to move through the linkage block 7, so as to switch the mold assembly 4 between the mold opening station and the mold closing station. The linkage block 7 is arranged at the edge of the back surface of the corresponding mold plate 5, ensuring that the opening and closing driving assembly 6 can be connected with each linkage block 7 respectively, and preventing the linkage blocks 7 from interfering with each other when the mold plate 5 is folded. The opening and closing driving assembly 6 is arranged below the mold assembly 4, which does not need to occupy the space between the limiting working surfaces 2, further reduces the distance between the limiting working surfaces 2 to reduce the size of the equipment, and also drives the mold plate 5 to move along the preset path through the linkage block 7, ensuring smooth opening and closing of the mold assembly 4.

[0054] In the embodiment, the mold assembly 4 is detachably mounted on the rack 1. When it is necessary to replace the mold assembly 4, the opening and closing driving assembly 6 is disconnected from the linkage block 7, and the mold assembly 4 is detached from the rack 1, so as to facilitate the replacement of the mold assembly 4 to meet the use requirements. After replacing the mold assembly 4, the extension and retraction distance of the opening and closing cylinder needs to be adjusted accordingly, so that the mold assembly 4 can be accurately switched between the mold opening station and the mold closing station. After replacing the mold assembly 4 with different axial sizes, the limiting assembly 3 needs to be replaced, so that the limiting assembly 3 can play a role in transmitting the axial clamping force in the active space 10.

[0055] In the embodiment, the opening and closing driving assembly 6 comprises driving rods fixedly connected with corresponding linkage blocks 7 and opening and closing cylinders connected across the driving rods. The machine frame 1 is provided with axial sliding rails. The top end of the driving rod is fixedly connected with the linkage block 7, the middle section slides along the sliding rail, and the bottom end is fixedly connected with the corresponding end of the opening and closing cylinder. The axial movement of the driving rod is realized by controlling the extension and retraction of the opening and closing cylinder, and the switching of the mold assembly 4 between the mold opening station and the mold closing station is realized. In addition, the opening and closing driving assembly 6 can also be of other structures, for example, through a rack and motor control, etc., which should all be considered as specific embodiments of the present application.

[0056] In the embodiment, the limiting assembly 3 is installed on the machine frame 1 through a limiting driving assembly, so that the limiting assembly 3 moves in the radial plane through the limiting driving assembly and switches between the idle station and the clamping station. The limiting driving assembly comprises a limiting cylinder for driving each limiting piece 8 to move to a specified clamping station. The axis of the cylinder is located in the radial plane, so that the limiting piece 8 can move in the radial plane in a posture with the axis perpendicular to the limiting working surface 2. Specifically, the limiting cylinder is located outside the activity space 10. One end of the limiting cylinder is fixedly connected to the machine frame 1, and the other end is fixedly connected to the middle section end of the limiting piece 8. This not only ensures that the limiting piece 8 can be accurately moved to the corresponding clamping station, but also prevents the limiting cylinder from colliding with the adjacent limiting working surface 2 or mold assembly 4.

[0057] In the embodiment, when the limiting assembly 3 comprises a plurality of limiting pieces 8, the limiting pieces 8 are all located in the same radial plane, ensuring that the mutually parallel limiting working surfaces 2 and mold plates 5 always maintain a parallel posture. The limiting driving assembly corresponds to the limiting assembly 3 one by one. The limiting driving assembly can be provided with a limiting cylinder corresponding to each limiting piece 8, or a limiting cylinder can be used to synchronously drive a plurality of limiting pieces 8, so that the limiting piece 8 switches between the idle station and the clamping station.

[0058] In the embodiment, the pressure boosting locking assembly 9 is arranged between the limiting working surface 2 and the adjacent limiting assembly 3. Since the position of the limiting working surface 2 is fixed, the pressure boosting locking assembly 9 is arranged on the limiting working surface 2, which ensures that the pressure boosting locking assembly 9 exerts an accurate axial clamping force on the limiting assembly 3 by reducing its own deviation. In addition, the pressure boosting locking assembly 9 can also be arranged on the end of the limiting piece 8 or the back surface of the mold plate 5 and synchronously move with the limiting piece 8 or the mold plate 5, which should also be considered as a specific embodiment of the present application. The pressure boosting locking assembly can be extended and retracted along the axis of the limiting working surface to achieve the purpose of clamping the mold assembly 4. The pressure boosting locking assembly can be a cylinder structure or an oil cylinder structure, which should all be considered as specific embodiments of the present application.

[0059] In the embodiment, the limiting working surface 2 can be formed by the positioning plate side wall fixed on the rack 1, and can also be formed by the wall surface of the rack 1. Since the rack 1 body has good deformation resistance, the limiting working surface 2 formed by the wall surface of the rack 1 has good deformation resistance. By omitting the guide rod bridged between the limiting working surfaces 2, the structure is effectively simplified, the raw material usage is effectively reduced, and the assembly, processing and transportation costs are reduced. Since the positioning performance and deformation resistance of the positioning plate are weak, a connecting rod is bridged between the positioning plates to ensure that the limiting working surfaces 2 always remain parallel, thereby ensuring that the mold plates 5 are accurately folded.

[0060] The other structures and effects of the bottle blowing machine in the embodiment are the same as those in Embodiment One, and will not be repeated here.

[0061] Embodiment Three:

[0062] Compared with Embodiment Two, the embodiment provides another specific structure of the bottle blowing machine.

[0063] As shown in Figure 3 and 4 , the mold assembly 4 is at least two groups and is arranged at an axial distance, and the limiting assembly 3 is arranged between the adjacent mold assemblies 4 to axially clamp each mold assembly 4 through the limiting working surface 2. Specifically, by increasing the number of mold assemblies 4 between the limiting working surfaces 2, the number of mold cavities is increased, thereby increasing the number of single-mold blowing, and effectively improving the processing efficiency.

[0064] In the embodiment, when the number of mold assemblies 4 increases, the number of limiting assemblies 3 also increases correspondingly to ensure that each mold plate 5 has a corresponding movement space 10. The limiting assembly 3 is at least two groups and is arranged on the two axial sides of the mold assembly 4, so that the limiting working surface 2 clamps the mold assembly 4 through the corresponding limiting assembly 3. Taking the case of arranging two groups of mold assemblies 4 between the limiting working surfaces 2 as an example, the following structures are included but are not limited to:

[0065] Structure One: The pressurizing locking assembly 9 is arranged on the limiting working surface 2, and a group of limiting assemblies 3 is arranged between the pressurizing locking assembly 9 and the adjacent mold assembly 4, between the adjacent mold assemblies 4, and between the mold assembly 4 and the adjacent limiting working surface 2. The axial length of the limiting assembly 3 located between the adjacent mold assemblies 4 satisfies the opening and closing requirements of the two mold plates 5 of the two mold assemblies 4, and the axial length of the limiting assemblies 3 on both sides satisfies the opening and closing requirements of a single mold plate 5, which not only ensures the smooth opening and closing of the two groups of mold assemblies 4, but also reduces the axial size of the equipment by reducing the distance between the limiting working surfaces 2.

[0066] Structure two: the pressurizing and locking assembly 9 is arranged between the two mold assemblies 4, the limiting assemblies 3 are four and correspond to the mold plates 5 one by one, specifically, the two axial sides of each mold assembly 4 are respectively abutted against the limiting working surfaces 2 and the pressurizing and locking assembly 9 through the limiting assemblies 3, and the axial length of each limiting assembly 3 matches the opening and closing distance of the corresponding mold.

[0067] In use, after each mold assembly 4 is switched to the clamping station and the limiting assembly 3 is switched to the clamping station, the pressurizing and locking assembly 9 is switched to the pressurizing state and axially clamps the mold assembly 4 and the limiting assembly 3 between the limiting working surfaces 2.

[0068] In the embodiment, the number of the limiting assemblies 3 can be adjusted as required, as long as the distance between the limiting working surfaces 2 can provide the movement space 10 required for opening the mold of each mold assembly 4, which should be considered as a specific embodiment of the present application. The number of the limiting assemblies 3 can be set according to actual conditions, for example, the adjacent mold plates 5 of the adjacent mold assemblies 4 can share the same limiting assembly 3, or the axially adjacent limiting assemblies 3 can be respectively arranged, which should be considered as a specific embodiment of the present application.

[0069] The other structures and effects of the bottle blowing machine in the embodiment are the same as those in embodiment two, and will not be repeated.

[0070] Embodiment four:

[0071] Compared with embodiment two or three, the present embodiment provides another specific structure of the bottle blowing machine.

[0072] As shown in Figure 5 At least two groups of limiting working surfaces 2 are arranged on the rack 1, at least one group of mold assemblies 4 is arranged between each group of limiting working surfaces 2, and the processing efficiency of the bottle blowing machine is sequentially improved.

[0073] Specifically, the limiting working surfaces 2 are two groups and are coaxially arranged along the axis, the number of the limiting working surfaces 2 is increased by using the axial space saved by a single group of limiting working surfaces 2, compared with the original structure of the bottle blowing machine, the processing efficiency is improved by increasing the number of the mold assemblies 4 without increasing the axial distance.

[0074] In the embodiment, when the limiting working surfaces 2 are two groups, a total of four limiting working surfaces 2 are arranged in parallel and coaxially, a connecting rod can be connected between any two limiting working surfaces 2, which is used to improve the clamping stability of the limiting working surfaces 2 to the mold assemblies 4. Specifically, the limiting working surfaces 2 at the two axial ends are formed by positioning plates, a connecting rod can be arranged between the two positioning plates to improve the positioning performance, and the two limiting working surfaces 2 in the middle are formed by the wall surface of the rack 1, which has good structural strength.

Claims

1. A blow molding machine with a limiting component, comprising a frame (1), wherein the frame (1) is provided with a conveying mechanism, a heating mechanism, and a blow molding mechanism, the blow molding mechanism comprising a mold opening and closing structure and a blowing structure, characterized in that, The mold opening and closing structure includes two limiting working surfaces (2) with parallel axes. A limiting component (3) and a mold assembly (4) are provided between the limiting working surfaces (2) along their axial directions. When the mold assembly (4) axially closes from the mold opening station to the mold closing station, the limiting component (3) moves from an idle station that is misaligned with the axial projection of the mold assembly (4) to a clamping station that coincides with the axial direction of the mold assembly (4), so that the limiting working surface (2) is axially clamped by the limiting component (3) at the mold closing station. The mold assembly (4) includes two parallel mold plates (5) that can be opened and closed along the axial direction. When the limiting assembly (3) switches from the locking position to the idle position, it forms an active space (10) between the mold assembly (4) and the limiting working surface (2) for the axial displacement of the mold plate (5). The limiting assembly (3) includes at least one limiting member (8). When the limiting assembly (3) moves to the locking position, the axial projection of the limiting member (8) is arranged in a centrally symmetrical manner.

2. A blow molding machine with a limiting component according to claim 1, characterized in that, The limiting components (3) are at least two sets and are placed on the two axial sides of the mold assembly (4) so ​​that the limiting working surface (2) clamps the mold assembly (4) through the corresponding limiting components (3).

3. A blow molding machine with a limiting component according to claim 2, characterized in that, The axial length of the limiting component (3) is not less than the axial opening and closing distance of the corresponding mold plate (5); or, the frame (1) is provided with a guide rail for guiding the opening and closing of the mold plate (5), and the guide rail is parallel to the axis of the limiting working surface (2); or, the frame (1) is provided with an opening and closing drive component (6) that is offset from the axial projection of the mold assembly (4), and the outer peripheral wall of the mold plate (5) extends outward to form a linkage block (7). The opening and closing drive component (6) drives the mold plate (5) to move through the linkage block (7) so that the mold assembly (4) switches between the mold opening station and the mold closing station.

4. A blow molding machine with a limiting component according to claim 1, characterized in that, The limiting member (8) is columnar and includes two parallel and coaxially arranged end faces, so that the limiting member (8) in the clamping position is axially tightly clamped.

5. A blow molding machine with a limiting component according to claim 1, characterized in that, The limiting component (3) is mounted on the frame (1) via the limiting drive component, so that the limiting component (3) can move in the radial plane via the limiting drive component and switch between idle station and clamping station.

6. A blow molding machine with a limiting component according to claim 1, characterized in that, The mold assembly (4) consists of at least two sets and is spaced along the axial direction. A limiting component (3) is provided between adjacent mold assemblies (4) so ​​that the limiting working surface (2) clamps each mold assembly (4) axially through the limiting component (3).

7. A blow molding machine with a limiting component according to any one of claims 1-6, characterized in that, A pressure-increasing locking assembly (9) is provided between the limiting working surfaces (2). The pressure-increasing locking assembly (9) extends axially from the venting state to the pressurizing state so that the mold assembly (4) in the mold closing position and the limiting assembly (3) in the locking position are axially clamped between the limiting working surfaces (2).

8. A blow molding machine with a limiting component according to claim 7, characterized in that, The pressure-increasing locking component (9) is disposed between the limiting working surface (2) and the adjacent limiting component (3); or, the pressure-increasing locking component (9) is disposed between the adjacent limiting components (3).

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