WO2024051137A1

WO2024051137A1 - Device and method for laterally withdrawing pet bottle blanks

Info

Publication number: WO2024051137A1
Application number: PCT/CN2023/081873
Authority: WO
Inventors: 李君�; 胡嵘; 潘鹏旭; 陈志刚; 张贤宝; 林娅丹
Original assignee: 西诺控股集团有限公司
Priority date: 2022-09-05
Filing date: 2023-03-16
Publication date: 2024-03-14
Also published as: CN115716325A

Abstract

Provided are a device and method for laterally withdrawing PET bottle blanks. The device comprises a driving structure arranged on an operation bench (1), a mechanical palm (5) being arranged at the tail end of the driving structure. A conveying belt (2) is arranged below the operation bench (1), and the conveying belt (2) passes through the operation bench (1) and is located below the driving structure. The operation bench (1) is provided with a placement hole, the conveying belt (2) being provided below the placement hole. A control assembly controls the driving structure arranged on the operation bench (1) to move the mechanical palm (5), so as to achieve movement of the mechanical palm (5) between a mold cavity position and the conveying belt (2), thereby achieving cooling and demolding of plastic molded products. The mechanical palm itself has a water-cooling circulation system and therefore cools products at the same time of product suction, such that the function of out-of-mold cooling is achieved, thus achieving rapid cooling and withdrawing of the PET bottle blanks. In addition, withdrawing processes for a first bottle blank mold and a second bottle blank mold cooperate with each other, thus greatly improving the production efficiency.

Description

A device and method for side taking out PET bottle preforms

Technical field

The invention relates to the technical field of mechanical manufacturing, and in particular to a device and method for side-taking PET bottle preforms.

Background technique

Plastic bottles are one of the commonly used containers. For example, most of the infusion bottles used in hospitals are plastic bottles. In the manufacturing process of plastic bottles, an injection molding machine needs to be used to injection mold the preforms, and then the preforms are transferred to the bottle blowing line. Blow molding is carried out on the bottle. PET bottle preform is a kind of plastic bottle preform. There is a long spout at the tail of the PET bottle preform product, so it cannot be sucked from the tail. The distance between adjacent products in the mold is not large, so pneumatic finger clamping will be difficult. Moreover, clamping will cause damage to the product surface to a certain extent, so PET bottle preforms are usually demoulded from the side.

According to data, in order to speed up the cooling rate of the bottle preforms, most of the existing preform plates have internal water-cooling circulation channels to speed up the cooling of the bottle preforms. However, this method has the following shortcomings: 1. The cooling efficiency is related to the flow rate of the cooling water, and corresponding seals need to be installed to prevent water leakage; 2. After a certain period of cooling water circulation, as the water temperature increases, the cooling efficiency decreases, which directly affects the bottle The cooling effect of the embryo.

Chinese patent document CN213137678U discloses a "PET bottle preform removal jig". A jig bottom plate is used. The top four corners of the jig bottom plate are fixed with backing plates. There are baffles symmetrically placed above the jig bottom plate. Both ends of the baffle are fixedly connected to the backing plates. There are three equidistantly spaced baffles inside the baffle. One mounting hole, the jig bottom plate is provided with a second mounting hole opposite the first mounting hole, a fixed seat is symmetrically fixed on the top of the jig bottom plate, polished rods are slidingly connected in the fixed seats, and push plates are fixed at both ends of the polished rod. , a cylinder is fixed at the top center of the jig bottom plate, and the output shaft of the cylinder is fixedly connected to one of the push plates. The above technical solution requires the PET bottle preforms to be completely cooled, which is inefficient and difficult to move effectively.

Contents of the invention

The original technical solution requires the PET bottle preforms to be completely cooled, which is inefficient and difficult to move effectively. The problem is to provide a device and method for side picking up PET bottle preforms. The robot control system is customized through the equipment. At the same time, the mold picking mechanical palm is customized to make the picking mold cavity structure consistent with the shape of the mold cavity. After the mold is opened, the robot enters the mold area. The negative pressure is generated by the operation of the robot vacuum pump, and the suction generated by the mechanical palm to pick up the mold cavity is sucked into the mold cavity. The robot has its own water-cooling circulation system, which sucks the product and quickly cools it to the outside of the mold. Cooling function: after the product is cooled, the mechanical palm is reversed 90 degrees, turns off the negative pressure suction, and then blows air to make the bottle preform drop, realizing the rapid cooling of the PET bottle preform and taking the mold, in conjunction with the first bottle preform mold and The mold taking process of the second bottle embryo mold greatly improves production efficiency.

The above technical problems of the present invention are mainly solved through the following technical solutions:

A side picking device for PET bottle preforms, including:

Mechanical palm, used to realize the demoulding, movement and external cooling of bottle preforms, and is connected to the driving structure;

The driving structure is used to move the mechanical palm to assist in the demoulding of bottle preforms, and is set on the upper surface of the operating platform;

The control component is used to control the cooperation between the mechanical palm and the driving structure to achieve demoulding of the bottle preforms;

The conveyor belt is used to transport the cooled preforms and is set under the operating platform.

There is a storage hole on the operating platform, and a conveyor belt is provided below the storage hole. The control component controls the driving structure set on the operating platform to displace the mechanical palm, thereby realizing the movement of the mechanical palm between the mold cavity position and the conveyor belt, and achieving mold control. Cooling and demoulding of film products.

Preferably, one side of the mechanical palm is provided with a fixed through hole connected to the driving structure. Next to the fixed through hole, there are a total air suction port, a total water inlet and a total water outlet arranged in parallel. The total air suction port is Connected to the vacuum pump, the other side of the mechanical palm is provided with several piece-picking mold cavity sleeves. The plurality of piece-picking mold cavity sleeves are evenly arranged and penetrated in the mechanical palm. There are circulating water channels on the piece-picking mold cavity sleeves. The main suction port is connected to the vacuum pump to demould the plastic film products. The main water inlet and the main water outlet are connected to the water pipe, and the water flow is passed through to cool the mechanical palm. A number of through holes are provided on the mechanical palm to place the pick-up mold cavity sleeves, and several pick-up mold cavities The cover can be installed on the mechanical palm mechanism to fine-tune the installation depth, so that the shape changes on the surface of the mechanical palm to adapt to the shape of the plastic film product and facilitate demolding.

Preferably, the driving structure includes a screw provided on the operating platform, a flip shaft is provided on the screw, and one end of the flip shaft is connected to the mechanical palm. The screw realizes the horizontal movement of the robot hand, and the flip axis realizes the vertical movement and angle change of the robot hand, effectively realizing the movement of the robot palm between the mold cavity position and the conveyor belt, and realizing the cooling and demoulding of plastic film products.

Preferably, the main board is connected to the main power supply through the power switch, the main board is connected to the vacuum pump through the vacuum pump switch, the main board is connected to the screw straight axis and the flip axis through the driver, and the main board is connected to the suction valve and the blow valve respectively to control For the suction and blowing of the mechanical palm, the main board is connected to the origin sensor of the straight axis, the rear limit sensor of the straight axis, the origin sensor of the rotation axis, the preform drop sensor, and the vacuum pressure sensor.

A working method of a side picking device for PET bottle preforms, including the following steps:

The S1 mechanical palm moves outside the first bottle embryo mold;

The S2 mechanical palm performs preparation work and takes out the mold after the first bottle embryo mold is opened;

The S3 mechanical palm places the bottle preforms on the conveyor belt, and the first bottle preform is re-injected;

The S4 mechanical palm moves outside the second bottle embryo mold to take the mold of the second bottle embryo mold;

S5 Repeat the above mold taking process after the second bottle embryo mold is taken.

Preferably, the step S1 specifically includes the control component controlling the linear axis and the flip axis of the screw to work, and with the assistance of the origin sensor of the linear axis, the rear limit sensor of the linear axis, and the origin sensor of the rotation axis, move the mechanical palm to the first position. The preform is outside the mold.

Preferably, the step S2 specifically includes starting the vacuum pump, using the vacuum pressure sensor to determine that the suction force of the suction port reaches the set threshold, and then the preform drop sensor detects that all preforms have fallen, and the first bottle The ejector pin on the embryo mold pushes out the bottle embryo, the mechanical palm sucks the bottle embryo away, and the ejector pin retreats.

Preferably, in step S3, while the mechanical palm sucks away the bottle preforms, the circulating water channels provided with several pick-up mold cavities on the mechanical palm cool down the bottle preforms to achieve cooling outside the mold. After the bottle preforms are cooled, the mechanical Turn your palm 90 degrees, turn off the negative pressure and inhale, then blow air to make the preforms fall to the conveyor belt.

Preferably, in step S5, the mechanical palm takes the mold of the second bottle embryo mold and then moves outside the first bottle embryo mold again, and repeats from step S1. The molds of the first bottle preform and the second bottle preform are taken in sequence. At the same time, the circulating water channel provided on the mechanical palm is used to achieve cooling outside the mold to speed up the cooling of the bottle preforms. All links cooperate to achieve efficient production of bottle preforms.

The beneficial effects of the present invention are: the robot control system is customized through the equipment, and the mold-taking mechanical palm is customized to make the mold-taking cavity structure consistent with the shape of the mold cavity. After the mold is opened, the robot enters the mold area, and the negative pressure is generated by the operation of the robot vacuum pump. , the mechanical palm picks up the mold cavity to generate suction and inhales it into the picking mold cavity, and the manipulator has its own water cooling circulation system, which sucks the product and cools it quickly to achieve the out-of-mold cooling function. After the product is cooled , the mechanical palm is reversed 90 degrees, turns off the negative pressure suction, and then blows to make the bottle preform fall, realizing the rapid cooling of the PET bottle preform and taking the mold, in conjunction with the removal of the first bottle preform mold and the second bottle preform mold. mold process, greatly improving production efficiency.

Description of the drawings

Figure 1 is a structural diagram of a PET bottle preform side taking device of the present invention.

Figure 2 is a structural diagram of a mechanical palm of the present invention.

Figure 3 is a schematic diagram of a principle connection structure of the present invention.

Figure 4 is a work flow chart of the present invention.
In the picture, there are 1 operating table, 2 conveyor belt, 3 lead screw, 4 turning shaft, 5 mechanical palm, and 6 pick-up mold cavity sleeve.

Detailed ways

The technical solution of the present invention will be further described in detail below through examples and in conjunction with the accompanying drawings.

Embodiment: A PET bottle preform side-taking device and method of this embodiment, as shown in Figure 1, includes a driving structure provided on an operating platform 1. The end of the driving structure is provided with a mechanical palm 5. The operating platform A conveyor belt 2 is provided below 1, and the conveyor belt 2 runs through the operating platform 1 and is located below the driving structure. The mechanical palm (5) is used to realize the demoulding, movement and external cooling of the bottle preforms. The driving structure is used to move the mechanical palm (5) to assist in demolding the bottle preforms. The control component is used to control the mechanical palm (5) and The cooperation of the driving structure realizes the demoulding of the bottle preforms, and the conveyor belt (2) is used to transport the cooled bottle preforms. There is a storage hole on the operating platform, and a conveyor belt is provided below the storage hole. The control component controls the driving structure set on the operating platform to displace the mechanical palm, thereby realizing the movement of the mechanical palm between the mold cavity position and the conveyor belt, and achieving mold control. Cooling and demoulding of film products.

There is a fixed through hole (5.4) connected to the driving structure on one side of the mechanical palm (5). Next to the fixed through hole (5.4), there are a main air inlet (5.1), a main water inlet (5.2) and a main air inlet (5.2) arranged in parallel. The water outlet (5.3), the main suction port (5.1) are connected to the vacuum pump, and the other side of the mechanical palm (5) is provided with a number of take-out mold cavity covers (6), and a number of take-out mold cavity covers (6) They are evenly arranged and installed in the mechanical palm (5), and the pick-up mold cavity cover (6) is provided with a circulating water path. The main suction port is connected to the vacuum pump to demould the plastic film products. The main water inlet and the main water outlet are connected to the water pipe, and the water flow is passed through to cool the mechanical palm. A number of through holes are provided on the mechanical palm to place the pick-up mold cavity sleeves. Several pick-up mold cavity sleeves can be installed and fine-tuned on the mechanical palm mechanism, thereby showing shape changes on the surface of the mechanical palm to adapt to the shape of the plastic film product. , easy to demould.

The driving structure includes a screw (3) arranged on the operating platform (1). The screw (3) is provided with a flip shaft (4), and one end of the flip shaft (4) is connected to the mechanical palm (5). The screw realizes the horizontal movement of the robot hand, and the flip axis realizes the vertical movement and angle change of the robot hand, effectively realizing the movement of the robot palm between the mold cavity position and the conveyor belt, and realizing the cooling and demoulding of plastic film products.

The control component includes a mainboard, which is connected to the main power supply through a power switch. The mainboard is connected to the vacuum pump through a vacuum pump switch. The mainboard is connected to the screw (3) straight axis and the flip axis (4) through the driver. The mainboard is respectively connected to the suction valve. , the blowing valve is connected to control the suction and blowing of the mechanical palm (5). The main board is respectively connected to the straight axis origin sensor, the straight axis rear limit sensor, the rotation axis origin sensor, the preform drop sensor, and the vacuum pressure sensor.

The S1 mechanical palm (5) moves outside the first bottle embryo mold, and the control component controls the screw (3) straight axis and flip axis (4) to work. The straight axis origin sensor, the straight axis rear limit sensor, and the rotation axis origin sensor With the assistance of , move the mechanical palm (5) outside the first bottle embryo mold.

The S2 mechanical palm (5) performs preparation work and takes out the mold after the first bottle embryo mold is opened. Start the vacuum pump, and use the vacuum pressure sensor to determine that the suction force at the suction port reaches the set threshold. Then the preform drop sensor detects that all the preforms have fallen. The ejector pin on the first preform mold will push out the preforms, and the mechanical palm (5) will The preform is sucked away and the thimble is withdrawn.

The S3 mechanical palm (5) places the preforms on the conveyor belt (2), and the first preform is re-injected. While the mechanical palm (5) sucks away the bottle preforms, the circulating water channels provided in several mold cavity sleeves (6) on the mechanical palm (5) cool down the bottle preforms to achieve cooling outside the mold. After the bottle preforms are cooled , the mechanical palm (5) turns 90 degrees, turns off the negative pressure suction, and then blows air to make the preforms fall to the conveyor belt (2).

The S4 mechanical palm (5) moves outside the second bottle embryo mold to take the mold of the second bottle embryo mold. Start the vacuum pump and use the vacuum pressure sensor to determine that the suction force at the suction port reaches the set threshold. Then the preform drop sensor detects that all the preforms have fallen. The ejector pin on the second preform mold will push out the preforms, and the mechanical palm (5) will The preform is sucked away and the thimble is withdrawn. While the mechanical palm (5) sucks away the bottle preforms, the circulating water channels provided in several mold cavity sleeves (6) on the mechanical palm (5) cool down the bottle preforms to achieve cooling outside the mold. After the bottle preforms are cooled , the mechanical palm (5) is reversed 90 degrees, turns off the negative pressure suction, and then blows air to make the preforms fall to the conveyor belt (2).

The S5 mechanical palm (5) takes the mold of the second bottle embryo mold and then moves outside the first bottle embryo mold again, and repeats from step S1. The molds of the first bottle preform and the second bottle preform are taken in sequence. At the same time, the circulating water path provided on the mechanical palm is used to achieve cooling outside the mold and speed up the cooling of the bottle preforms. All links cooperate to achieve efficient production of bottle preforms.

Claims

A side picking device for PET bottle preforms, which is characterized in that it includes:

The mechanical palm (5) is used to realize the demoulding, movement and external cooling of the bottle preforms, and is connected to the driving structure;

The driving structure is used to move the mechanical palm (5) to assist in the demoulding of bottle preforms, and is arranged on the upper surface of the operating platform (1);

The control component is used to control the cooperation between the mechanical palm (5) and the driving structure to realize the demoulding of the bottle preforms;

The conveyor belt (2) is used to transport the cooled bottle preforms and is arranged below the operating platform (1).
A side picking device for PET bottle preforms according to claim 1, characterized in that a fixed through hole (5.4) connected to the driving structure is provided on one side of the mechanical palm (5), and next to the fixed through hole (5.4) There is a general suction port (5.1), a total water inlet (5.2) and a total water outlet (5.3) arranged in parallel. The general suction port (5.1) is connected to the vacuum pump, and the mechanical palm (5) has another There are several piece-picking mold cavity sleeves (6) on the side. Several piece-picking mold cavity sleeves (6) are evenly arranged and arranged through the mechanical palm (5). There are circulating water channels on the piece-picking mold cavity sleeves (6).
A side picking device for PET bottle preforms according to claim 1, characterized in that the driving structure includes a screw (3) arranged on the operating platform (1), and a flip shaft is provided on the screw (3) (4), one end of the flip shaft (4) is connected to the mechanical palm (5).
A PET bottle preform side taking device according to claim 3, characterized in that the control component includes a main board, the main board is connected to the main power supply through a power switch, the main board is connected to the vacuum pump through a vacuum pump switch, and the main board is connected through a driver respectively It is connected to the straight axis of the screw (3) and the flip axis (4). The main board is connected to the suction valve and the blow valve respectively to control the suction and blowing of the mechanical palm (5). The main board is respectively connected to the origin sensor of the straight axis and the straight axis. The axis rear limit sensor, the rotation axis origin sensor, the preform drop sensor, and the vacuum pressure sensor are connected.
A working method of a side picking device for PET bottle preforms, which is characterized by including the following steps:

The S1 mechanical palm (5) moves outside the first bottle embryo mold;

The S2 mechanical palm (5) performs preparation work and takes out the mold after the first bottle embryo mold is opened;

The S3 mechanical palm (5) places the bottle preforms on the conveyor belt (2), and the first bottle preform mold is re-injected;

The S4 mechanical palm (5) moves outside the second bottle embryo mold to take the mold of the second bottle embryo mold;

S5 Repeat the above mold taking process after the second bottle embryo mold is taken.
The working method of a side picking device for PET bottle preforms according to claim 5, characterized in that the step S1 specifically includes the control component controlling the straight axis and the flip axis (4) of the screw (3) to work. With the assistance of the axis origin sensor, the linear axis rear limit sensor, and the rotation axis origin sensor, move the mechanical palm (5) outside the first bottle embryo mold.
The working method of a PET bottle preform side taking device according to claim 5, characterized in that the step S2 specifically includes starting the vacuum pump, determining through the vacuum pressure sensor that the suction force of the suction port reaches the set threshold, and then the bottle preform The drop sensor detects that all preforms have fallen, the ejector pin on the first preform mold pushes out the preforms, the mechanical palm (5) sucks the preforms away, and the ejector pin retreats.
The working method of a side picking device for PET bottle preforms according to claim 7, characterized in that in step S3, while the mechanical palm (5) sucks away the bottle preforms, several parts on the mechanical palm (5) are picked up. The circulating water path provided in the mold cavity cover (6) cools down the preforms to achieve cooling outside the mold. After the preforms are cooled, the mechanical palm (5) is reversed 90 degrees, turns off the negative pressure suction, and then blows air. The preforms fall onto the conveyor belt (2).
The working method of a PET bottle preform side taking device according to claim 6, characterized in that in step S5, the mechanical palm (5) takes the second preform mold and then moves it to the first preform mold again. Otherwise, repeat from step S1.