49results about "Blowing machine gearings" patented technology

The application discloses a kind of glass bottle processing with quick demolding blanking device and implementation method thereof, belong to glass bottle processing technical field.A kind of glass bottle processing with quick demolding blanking device, including mould support frame and blanking support, the one end of mould support frame is fixedly connected with blanking support, first support plate, second support plate, third support plate and fourth support plate are arranged in parallel on mould support frame, first mould is movably connected between first support plate and second support plate.The application proposes a kind of glass bottle processing with quick demolding blanking device and implementation method thereof, by the first mould, second mould and third mould of automatic control moulding and moulding process, and the automatic ejection function of ejector plate, the ejector rod on ejector plate is as bottom support when moulding, stably glass bottle body is lifted when moulding, reduces the direct contact to glass bottle body surface, reduces the risk of scratch or damage.

The invention relates to the technical field of glass bottle processing, and provides a glass wine bottle blowing forming process which comprises the following steps: S1, taking materials and cogging, and putting a glass raw material into a primary bubble mold to prepare a glass material ball; s2, blowing primary bubbles: blowing air into the frit balls to prepare glass bubbles; s3, in-mold shaping: putting the glass bulb into a forming mold, and blowing air into the glass bulb to obtain a glass wine bottle; s4, demolding and cooling; wherein blowing of the glass wine bottle is carried out in the workbench, the primary foaming mold and the forming mold are both arranged on the workbench, and the primary foaming mold is located above the forming mold; an overturning shaft is rotationally connected between the primary foaming mold and the forming mold, and a blowing pipe is connected to the overturning shaft. According to the blowing forming process for the glass wine bottle, the transferring convenience of the glass bulbs can be improved.

The utility model relates to the technical field of cosmetic glass bottle production, in particular to a cosmetic glass bottle blowing mechanism which comprises four supporting rods, a conveying belt is fixedly mounted among the four supporting rods, and mounting plates are fixedly connected to the middle of the front end and the middle of the rear end of the conveying belt. And anti-falling mechanisms are installed on the upper portions of the outer side faces of the two installation plates in a penetrating and inserting mode, and fixing assemblies are fixedly connected to the left portion and the right portion of the front end of the conveying belt. According to the cosmetic glass bottle blowing mechanism, the electric push rod in the anti-falling mechanism can push the anti-falling plate to a proper position according to the size of the cosmetic glass bottle, and the movable wheels which are distributed on the anti-falling plate at equal intervals pairwise can rotate along with the movement of the glass bottle while slightly pressing the glass bottle to prevent the glass bottle from falling, so that the cosmetic glass bottle can be blown out conveniently. And frictional resistance is reduced, so that the equipment can meet the conveying requirements of glass bottles of various sizes, and the universality of the equipment and the production continuity are improved.

The invention discloses a glass tube blowing air automatic control device which comprises an automatic blowing control device, a blowing driving jig is installed on the outer side of the automatic blowing control device, the blowing driving jig is installed on a glass tube blowing table, meanwhile, a blowing limiting plugging jig is installed on the other side of the surface of the glass tube blowing table, and the blowing limiting plugging jig is installed on the other side of the surface of the glass tube blowing table. A glass tube body is clamped and fixed between the blowing limiting plugging jig and the blowing driving jig, and a self-adaptive blowing mold mechanism is mounted above the middle part of the glass tube body. According to the automatic control device for blowing air of the glass tube, the mold A and the mold B of the self-adaptive blowing mold mechanism can synchronously move inwards for mold closing, the mold A and the mold B can be accurately attached to the forming position in the middle of the glass tube body, stable constraint is provided from the outside, and the problem of deformation caused by no constraint or non-uniform constraint during blowing forming of a glass product is effectively avoided; and the product design form can be kept, and the forming deviation is reduced.

The glass forming individual section machine (14) includes a machine frame (20) having a glass gob loading axis (Z'), a crossable blank side (24) including a blank mold (14a) configured to form a glass gob (G) into a parison and having a blank mold vertical axis (Vi), and a mold carriage (26) movably supported on the machine frame and coupled to the crossable blank side for linearly translating the crossable blank side toward the glass gob loading axis to align the blank mold vertical axis with the glass gob loading axis and for linearly translating the crossable blank side away from the glass gob loading axis. Related methods of loading blank molds of the individual section machine are also disclosed.

A burner head actuator (10) for lubricating glassware molds of a glassware forming machine includes a base mount (14) and a guide post (16) carried by the mount. A gearbox housing (54) carried on the guide post carries a gear train (58) including drive and driven gears (82, 84). A servomotor (22) is coupled to the gearbox. A burner head arm (26) is carried by the gearbox housing and coupled to the driven gear for rotation relative to the gearbox housing about an arm axis (91). The arm includes a burner head leveling gear train (94) including a drive sprocket (108) direct-driven by the driven gear about the arm axis and a driven sprocket (110) driven by the drive sprocket via a chain (114). The servomotor rotates the gearbox drive gear, thereby rotating the gearbox driven gear and burner head arm, and thereby rotating the leveling gear train so that the burner head remains level as the arm is rotated about the arm axis.

The invention belongs to the technical field of bottle-making machines, and particularly relates to a bottle-making machine turntable mechanism which comprises a base, and a rotating shaft is rotatably mounted in the middle of the top of the base; an upper disc and a lower disc fixedly sleeve the outer wall of the rotating shaft respectively, the bottom of the lower disc is fixedly connected with a gear ring, the inner wall of the gear ring is fixedly connected with a bearing, an inner cavity of the bearing is fixedly connected with the top of the base, the outer wall of the gear ring is meshed with a gear, a servo motor is arranged on the lower side of the gear, and the outer end of a transmission shaft of the servo motor is fixedly connected with a speed reducer; the outer end of the output end of the speed reducer is fixedly connected with the gear. A speed reducer is driven to work through a servo motor, so that a gear can be driven to rotate at a reduced speed, a gear ring is driven to rotate, a lower disc is driven to rotate, a rotating shaft and an upper disc can be driven to rotate, a forming mold on the upper disc is driven to rotate and change positions, and the rotating stability is improved; and the gear transmission precision is high, so that the accuracy of rotating and adjusting the position is improved.

The application discloses a kind of based on variable wall thickness control's beer bottle lightweight pressure blow forming method, through material drop accurate supply, initial mould variable pressure pressing, bottle blank vacuum shaping, mould transfer preheating, three-stage variable pressure blow forming, partition cooling solidification, annealing stabilization, eight major steps of on-line detection, in combination with variable-diameter punch, partition temperature control, dynamic punch compensation, segmented vacuum control, realize the differentiation of beer bottle mouth, shoulder, body, bottom wall thickness Precision distribution;The weight of the 500ml specification beer bottle prepared is only 260-280g, the weight reduction is 15%-23%, the bottle body thickness ratio is less than or equal to 1.8:1, and the internal pressure strength is greater than or equal to 1.6MPa, the impact strength is greater than or equal to 1.0J, the internal stress is less than or equal to 2 levels, solve the contradiction between weight reduction and strength, at the same time reduce the defective rate to 2%-3%, save raw materials and energy consumption, adapt to the demand of beer bottle large-scale green production.

The invention provides a light-weight double-section blowing type forming process for a glass bottle, belongs to the field of glass product processing, and solves the problems of low forming production efficiency, insufficient precision, poor system performance and the like of the existing glass bottle. Comprising the following steps: S1, preparing and melting raw materials; s2, feeding and prototype forming; s3, shaping and strengthening; s4, annealing treatment; and S5, carrying out online detection and sorting. According to the invention, through double-section pressure blowing and addition of a special reinforcing agent, the difficult problem of consideration of light weight and strength is successfully solved, dynamic initial blowing pressure control based on viscosity and servo precise control of mold movement are adopted, and an online laser thickness measurement and intelligent feedback system is combined, so that process parameters can be automatically and finely adjusted, and the consistency and qualified rate of products are improved; each core module is provided with an electric three-dimensional positioning mechanism, so that quick and accurate centering and cooperative adjustment of the mold are realized; a whole-process quality monitoring system from forming to delivery is integrated, the mechanical reliability and durability of each delivery product are ensured, and defective products are avoided.

The application belongs to the technical field of glass product forming equipment, and particularly relates to a glass bottle blow molding device with an openable and closable micro-hole exhaust structure, which comprises a bottle blowing machine, the side of the bottle blowing machine is connected with a first mold, the bottle blowing machine is connected with a movable seat in an extending and retracting mode, the side of the movable seat is connected with a second mold which is used in cooperation with the first mold, and the bottle blowing machine is provided with a blow molding mechanism above the first mold and the second mold; in the application, the pressure sensor is used for real-time monitoring and closed-loop adjustment of a control system, the variable-diameter pressure control hole and the sealing plug are linearly matched, stepless adjustment of a pressure relief rate is realized, the cavity pressure is stable during the blow molding process, the pressure fluctuation is avoided to affect the forming quality, the lifting stroke, the swing angle and the swing frequency of the nozzle can be adjusted according to the shape of the mold and the curvature of the bottle, the diversified production requirements are met, and the process adaptability is improved.

The invention relates to a method for producing a hollow glass article (1), wherein a glass gob (2) is transferred into a mould (3, 4) and in the mould is blown into the hollow glass article (1) at least by means of compressed air (5); wherein the method includes a first process (6) with first process parameters for producing the hollow glass articles (1), wherein the first process (6) is interrupted at specific time intervals and a lubricant (7) is applied to the mould (3, 4), wherein the method comprises at least the following steps: a) carrying out the first process (6) with first process parameters; b) interrupting the first process (6) and applying a lubricant (7) to the mould (3, 4); c) initiating a second process (8) with second process parameters, which differ at least in part from the first process parameters; d) resuming the first process (6) with first process parameters.

Methods and systems for controlling vertical glass distribution are provided. A traversing pyrometer periodically measures a parison actual temperature after the parisons exit a blank mold. The thermal camera takes a thermal image of each glass container after the glass container exits the blow mold. A vertical glass signature extraction module extracts a vertical glass distribution signature. A parison temperature estimator determines a parison estimated temperature for each vertical glass distribution signature obtained based on the vertical glass distribution signature, a most recently measured parison actual temperature and a parison stretch time. A parison temperature summer compares the parison estimated temperature to a parison set point temperature to determine a parison temperature error. A parison temperature control controls a blank mold contact time based on the parison temperature error.

The invention relates to the technical field of glass production, and discloses a multi-shaft linkage type glass blowing device which comprises a workbench, a rack, an air cylinder, an air outlet pipe, an air adjusting structure and an impurity removing structure, the air outlet pipe is driven by the air cylinder to be tightly attached to a mold port, air flow can be prevented from leaking from a gap of the port in the blowing process, and the air outlet pipe is driven by the air cylinder to be tightly attached to the mold port. The high-pressure air flow can fully act on the glass liquid; the air adjusting structure realizes lifting of the sleeve along the long rod through cooperative transmission of a motor, a gear and a screw rod, the bottom accumulation effect of molten glass caused by gravity is actively resisted in combination with a bottom-to-top movement track of the sleeve and an air hole blowing mode, and the problem that the wall thickness is not uniform due to too thick bottom and too thin top in traditional fixed position blowing is thoroughly solved; through meshing transmission of the planetary gear and the gear ring, the impurity removal brush is driven to rotate around the sleeve and rotate, and is matched with the inner connecting brush to synchronously clean the inner wall of the sleeve, and impurities such as glass residues and deposited carbon remaining on the inner wall and the outer wall can be comprehensively removed.

The utility model discloses a mould for processing a special-shaped perfume glass bottle, which comprises a rack, a plurality of groups of brackets are fixed at the top of the rack, a feeding component is arranged on the rack, a round hole is formed in one side of the top of the rack, a transverse plate is fixed inside the rack, and a vertical rod is arranged on the transverse plate in a penetrating manner. According to the mold for processing the special-shaped perfume glass bottle, the mounting base can be driven to transversely move through the transverse moving assembly so that the glass bottle can be discharged, in the transverse moving process of the mounting base, the mounting base can drive a vertical plate and a transverse rod to transversely move at the same time, and a wedge-shaped block on the transverse rod can drive a vertical rod and a dust removal spray head to ascend; in this way, the dust removal spray heads can ascend to remove dust and clean the inner walls of the two sets of molds, then the cleanliness of the inner walls of the molds is improved, the situation that the machining quality of glass bottles is affected due to dust attachment is avoided, the production yield is improved, the molds are cleaned while the glass bottles are unloaded, the operation time is greatly shortened, and the production efficiency is improved. The operation efficiency is improved.

The present invention relates to a method and system for determining the manufacture of a glass container with its mold number. The method consists of marking the molds according to a system of pre-established coordinates based on a Fibonacci system or sinusoidal system, for identifying a mold number with the container that has been formed in that mould. Control means are programmed with the sinusoidal or Fibonacci coordinate system according to various coordinate points of each mold. The containers are formed with a bead or protuberance located at the bottom of each container according to the pre-established coordinate system. The recently formed containers are transported on a conveyor belt. Optical means are used to inspect the containers to identify, by means of the position of the bead or protuberance, the mold number related to the container.

The invention belongs to the technical field of glass bottle making, and particularly relates to a full-servo bottle supporting, clamping and moving and bottle clamping device and a method thereof.The full-servo bottle supporting, clamping and moving and bottle clamping device comprises a sliding rail, the sliding rail is fixedly installed on the outer wall of a supporting column, an adaptive sliding block is installed on the outer wall of the sliding rail in a sliding mode, and a first clamping assembly and a second clamping assembly are installed on the two sides of the sliding block respectively; the sliding block is further connected with a first servo driving assembly, one side of the first forceps holder assembly is connected with a bottle supporting assembly, and an industrial control computer is further included. The first servo driving assembly drives the first forceps holder assembly and the second forceps holder assembly to transversely move, so that the servo driving assembly drives the first forceps holder assembly and the second forceps holder assembly to longitudinally move, the position is accurately adjusted, and the effects of convenient, accurate and reliable adjustment for different products are achieved; in addition, the servo system utilizes a remote industrial control computer to directly adjust parameters so that rapid adjustment can be achieved, the adjustment operation is convenient, and the operation efficiency can be improved.

The invention relates to an ultra-light glass bottle forming system based on a small-opening pressing and blowing method, in particular to the field of glass bottle manufacturing, through cooperative work of an optical signal acquisition module, a rheological inversion module, a process decision module and a dynamic evolution module, the forming precision and efficiency are improved, the optical signal acquisition module synchronously acquires a melt surface scattering signal and a temperature signal, and the forming precision and efficiency are improved. An innovative channel is provided for sensing the melt state in real time, the rheology inversion module obtains a three-dimensional viscosity field in real time through tensor decomposition and a cross-scale neural network, traditional rheology measurement limitation is broken through, the process decision module generates differentiated blowing pressure and sequential control instructions through reinforcement learning, the forming process is optimized, and the forming quality is improved. And the dynamic evolution module ensures that the product quality is stable through real-time monitoring and automatic adjustment, and the system remarkably improves the production efficiency and the quality stability of ultra-light glass bottles.

The invention relates to a system and method for monitoring and regulating sections of a for forming hollow glass articles. Each section includes a parison-forming device forming device includes a device for cooling its two parts. The system includes a processing unit configured to deliver corrective data allowing the cooling devices of the parison-forming devices to be controlled. The system further includes the same number of cameras measuring in the near infrared wavelength (e.g., NIR cameras), which deliver shades of grey measured on the parison-forming moulds. The processing unit includes a database of visual hues corresponding to temperatures defined on the parison-forming devices in an open position. The processing unit delivers corrective data as a function of the shades of grey measured in real time by the NIR cameras on the parison-forming devices in the open position and of at least one reference temperature adjusted on said system.

A glass forming line (14) includes a machine frame (20) having a glass gob loading axis (Z'), a traversable parison side (24) including a parison mold (14a) configured to form a glass gob (G) into a parison and having a parison mold vertical axis (Vi), and a mold carriage (26) movably carried on the machine frame and coupled to the traversable parison side to linearly translate the traversable parison side toward the glass gob loading axis to align the parison mold vertical axis with the glass gob loading axis and linearly translate the traversable parison side away from the glass gob loading axis. Related methods of loading a parison mold of a line are also disclosed.

The invention belongs to the technical field of bottle-making machines, and particularly relates to a rotating disc type bottle-making machine which comprises a base, a carrier block is fixedly mounted at the top of the base, a rotating shaft is rotatably mounted at the top of the carrier block, and a driving assembly is connected to the lower side of the outer wall of the rotating shaft and used for driving the rotating shaft to rotate; the upper side of the outer wall of the rotating shaft is fixedly sleeved with a rotating disc, forming dies are fixedly installed on the four upper sides of the rotating disc, bottom die lifting devices are connected to bottom dies of the forming dies, and synchronous positive blowing main shafts are rotationally installed on the two sides of the top of the rotating disc. The four stations are arranged on the rotating disc, the forming dies are installed on the stations, the servo motor is controlled to rotate by utilizing an external industrial control computer, and therefore the rotating disc can be controlled to rotate by 90 degrees or 180 degrees, double stations and four stations can be automatically switched, rapid switching is achieved, the working efficiency is improved, and the working efficiency is improved. And by means of the arrangement of the two-mold bottle making synchronous positive blowing head and the four-mold air blowing head, the two-mold bottle making synchronous positive blowing head and the four-mold bottle making synchronous positive blowing head can be rapidly suitable for being used by two molds and four molds.

The application discloses a conveying belt bottle blowing device and a use method thereof, which comprises a mounting box, the top of the mounting box is provided with a conveying belt, the top of the mounting box is provided with a top plate, the top of the mounting box is provided with a bottle blowing structure, the bottom of the top plate is provided with a carrying structure, the top surface of the mounting box is provided with a moving structure, and the moving structure is located between the conveying belt and the bottle blowing structure. Through the bottle blowing structure, the positioning modules on the two sides can position and fix the packaging bottles, the electric control moving rod drives the bottle blowing port to blow the packaging bottles, and through the carrying structure, the packaging bottles are clamped by the cooperation of the fixed clamping jaw and the rotating clamping jaw, the grabbing arm can still keep vertical and linear during the overall rotation, and the packaging bottles can keep stable during the carrying, taking and placing. Through the moving structure, the carrying structure drives the packaging bottles to move to the moving structure, the rotating motor drives the packaging bottles to rotate, the packaging bottles are smoothly moved to the conveying belt for conveying and transporting.

The utility model discloses a multi-angle automatic mold closing machine which comprises a rack, a bottom mold arranged on the rack and at least three side molds arranged around the bottom mold, the side molds are arranged on the rack in a sliding mode, and the side molds are driven by a driving piece. A cavity is formed between the bottom die and the side dies, and air holes communicated with the cavity are formed in the tops of the side dies. According to the mold closing machine disclosed by the utility model, the mold of a designed product can be completely restored by arranging a plurality of movable side molds, and the production and processing of glass bottles with complicated shapes are met.

The invention belongs to the technical field of air volume adjustment, and particularly relates to a forming machine bottom die lifting device air volume adjusting assembly which comprises a top plate, the bottom of the top plate is fixedly connected with a shell, and the bottom of the shell is fixedly connected with a bottom plate. A cover plate is arranged at the position, located on the upper side of the bottom plate, of an inner cavity of the shell, a screw is arranged between the cover plate and the bottom plate, a limiting block is fixedly installed on one side of the top of the bottom plate, the inner end of the screw is rotationally connected with the limiting block, the outer wall of the screw is sleeved with an air door adjusting plate, and an air inlet is formed in the bottom plate and penetrates through the cover plate. The bottom of the top plate is provided with a plugging assembly corresponding to the air inlet. The air volume adjusting insertion plate can be driven to move by rotating the screw rod under the condition of thread driving, so that the positions of the air volume adjusting insertion plate and the air inlet are adjusted, the air inlet volume can be adjusted, adjustment can be performed by referring to the dial during adjustment, and the adjustment accuracy can be improved.

A glass forming individual section machine (14) includes a machine frame (20) having a glass gob loading axis (Z'), a traversable blank side (24), including a blank mold (14a) configured to form a glass gob (G) into a parison and having a blank mold vertical axis (V1), and a mold carriage (26) movably carried on the machine frame and coupled to the traversable blank side to linearly translate the traversable blank side toward the glass gob loading axis to align the blank mold vertical axis with the glass gob loading axis and to linearly translate the traversable blank side away from the glass gob loading axis. A related method of loading a blank mold of an individual section machine is also disclosed.

The utility model belongs to the field of nozzle connecting equipment, and particularly relates to an automatic tire blowing nozzle connecting device convenient to operate, which comprises a control box, a rotating disc is rotatably mounted at the top of the control box, a plurality of tire blowing components are arranged at the top of the rotating disc, and a support plate is fixedly mounted on one side of the control box. A nozzle containing barrel used for containing a bottle nozzle is arranged above the supporting plate, a combustion nozzle used for combustion at the joint of a bottle tire and the bottle nozzle is arranged at the top of the supporting plate, a sliding plate is installed at the top of the supporting plate in a sliding mode, a pushing plate is fixedly installed at the top of the sliding plate, and a rotating motor is fixedly installed on one side of the pushing plate. And an output shaft of the rotating motor is fixedly connected with the mouthpiece placing cylinder. The nozzle connecting device is reasonable in design, the bottle nozzle can be conveniently fixed, when the contact position of the bottle nozzle and a bottle tire is heated and softened, the bottle nozzle can be automatically pushed to extrude towards the bottle tire by arranging the extrusion spring, and therefore the nozzle connecting purpose is achieved.

The invention provides a method and a system for dynamically adjusting anti-skid textures of a glass container, which are applied to the technical field of glass manufacturing, and are characterized in that feedforward information and feedback information are acquired in real time, an initial adjustment amount is predicted, a target adjustment amount is obtained through correction according to the feedback information, and then adjustment is executed to cope with dynamic changes in a production process. The method has the advantages of improving texture control precision, stabilizing texture quality and being suitable for high-speed production.

The invention relates to the technical field of mold precision calibration, and discloses a mold pose self-compensation calibration system which comprises a bearing platform, a lifting driving cylinder is installed on the top of the bearing platform, and the output end of the lifting driving cylinder penetrates through the bearing platform and is fixedly connected with an upper mold fixing base. An upper die body is fixedly connected to the bottom of the upper die fixing base, a lifting driving cylinder drives the upper die fixing base and controls the upper die body to move vertically, a micro-displacement driving module is arranged on the table top of the bearing platform, and a lower die pose adjusting table is arranged on the top of the micro-displacement driving module. A lower die body is fixedly connected to the top of the lower die posture adjusting table, a micro-displacement driving module controls the lower die posture adjusting table and adjusts the angle of the lower die body, and state sensing modules are installed in the middle of the upper die body and the middle of the lower die body. Through closed-loop control of the state sensing module, the computer and the micro-displacement driving module and in combination with the mechanical locking module, high-precision calibration and maintenance of the concentricity of the mold are achieved, and the calibration efficiency and the product quality are improved.

The invention relates to the technical field of glass bottle pressing and blowing, and discloses a pressing and blowing forming mold based on energy-saving glass bottle production, which comprises a base, a front vertical plate is arranged on one side of the top of the base, a rear vertical plate is arranged on the other side of the top of the base, a rotating disc is arranged on the front vertical plate, and a gas storage ring is further arranged on the front vertical plate; two forming mold bodies are symmetrically distributed on the rotating disc, glass bottle forming grooves are formed in the forming mold bodies, and the glass bottle forming device further comprises a limiting component arranged on the rear vertical plate. According to the pressing and blowing forming mold based on energy-saving glass bottle production, the rotating assembly drives the rotating disc to drive the mold to rotate, the bottle opening and the bottle bottom are turned over alternately, glass raw materials are evenly distributed in the forming groove under the action of airflow, and raw material waste caused by uneven wall thickness in a traditional technology is avoided. Meanwhile, the utilization rate of raw materials can be increased, the consumption of molten glass raw materials and energy is remarkably reduced, the production cost of unit products is reduced for enterprises, and the energy-saving production requirement is met.

This invention provides a vibration mechanism for an assembled glass bottle mold that prevents bubble formation, relating to the field of glass bottle molds. It includes: a dual-control cylinder fixedly installed in the middle of a central column; a swing claw hinged to the bottom of the outer wall of the central column; a main cylinder hanger intermittently inserted into the middle of the top end face of a vibrating turntable; four sliding control plates slidably connected in a circular array on the top end face of the vibrating turntable; control plates hinged to the middle of the side walls of the sliding control plates; the bottom of the vibrating turntable rotatably connected to the top of a fixed base; and a control shaft rotatably connected to the middle of the bottom of the fixed base. A connecting nozzle connected to the end of an external bracket, under the action of a support spring, connects the bottom of the connecting nozzle to the constant temperature bath of the bottle mold. This allows for the supply of hot air to the constant temperature bath through the connecting nozzle, reducing the temperature difference between the bottle mold and the molten glass, thus solving the problems of bubbles and uneven thickness during glass bottle molding caused by mold changes and uneven heating / cooling.