Embryo taking device for bottle embryo injection molding machine

Abstract

The invention relates to the technical field of injection molding machines, and discloses a preform taking device for a bottle preform injection molding machine, which comprises a rack, a preform unloading plate for connecting a manipulator, a preform taking plate movably arranged on the rack along the length direction of the rack, and a vacuum generation device arranged on the rack, a plurality of blank taking barrels communicated with a vacuum generating device are arranged on the blank taking plate, and the blank taking barrels are used for being connected with the bottoms of bottle blanks to be taken out on a mold in a sleeving manner and taking out the bottle blanks from the mold; a plurality of blank receiving pipes communicated with the vacuum generating device are arranged on the blank unloading plate, and the blank receiving pipes extend into the bottle blanks from bottle openings of the bottle blanks under the action of the manipulator and take out the bottle blanks from the blank taking cylinder. According to the bottle blank discharging device, when the bottle blanks are discharged to the material receiving bin, the bottle blanks are in a vertical state, bottle openings face upwards, and the bottle bottoms of the bottle blanks make contact with the material receiving bin in the discharging process, so that the situation that the bottle openings collide with the material receiving bin in the falling process of the bottle blanks, and consequently the bottle openings are damaged is avoided, and the quality of final products is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, in particular to a preform taking device for a bottle preform injection molding machine. Background Art

[0002] In the production process of multi-cavity preforms, the preforms are cooled after injection molding in the mold, and then the preforms are taken out from the mold. The current removal device is a manipulator equipped with multiple preform removal cylinders. The preform removal cylinders on the manipulator correspond to the mold cavities on the mold. The preform removal cylinders are evacuated to form negative pressure, sucking the bottom of the preform, and then the manipulator moves to remove the preform. After the preform is taken out, the manipulator rotates 90° and transfers the preform to the top of the receiving bin of the injection molding machine. Then the manipulator releases the preform, and the preform falls into the receiving bin.

[0003] Since the preform removal cylinder sucks the bottom of the preform, when the robot drives the preform to rotate 90°, the mouth of the preform faces downward, which causes the mouth of the preform to collide with the receiving bin during the process of releasing the preform, resulting in damage to the mouth of the preform. The mouth of the preform is the mouth of the final product, which will cause the final product to be unqualified. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a preform removal device for a preform injection molding machine, which prevents the bottle mouth of the preform from colliding with the receiving bin during the falling process, thereby avoiding damage to the bottle mouth and ensuring the quality of the final product.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A preform removal device for a preform injection molding machine, the preform injection molding machine is provided with a mold for injection molding a preform, comprising a frame, a preform removal plate for connecting a manipulator, a preform removal plate movably arranged on the frame along the length direction of the frame, and a vacuum generating device arranged on the frame;

[0007] The embryo removal plate is provided with a plurality of embryo removal cylinders for communicating with the vacuum generating device, and the embryo removal cylinders are used to sleeve the bottom of the bottle embryo to be removed from the mold and remove the bottle embryo from the mold;

[0008] The unloading plate is provided with a plurality of embryo receiving tubes connected with the vacuum generating device. Under the action of the manipulator, the embryo receiving tubes extend from the bottle mouth of the bottle preform into the interior of the bottle preform and take the bottle preform out of the embryo taking tube.

[0009] Preferably, a gas storage tank is further provided on the frame, and a blowing port is provided on the embryo unloading plate corresponding to the embryo receiving tube, and the blowing port is connected to the gas storage tank to guide the gas in the gas storage tank to the outer surface of the bottle embryo.

[0010] Preferably, the embryo receiving tubes are arranged in a rectangular array, each of the embryo receiving tubes is correspondingly provided with two blowing ports, and the two blowing ports are respectively arranged on both sides of the corresponding embryo receiving tube.

[0011] Preferably, the embryo unloading plate has two surfaces arranged opposite to each other, the embryo receiving tube is arranged on one surface of the embryo unloading plate, and the other surface of the embryo unloading plate is provided with a vacuum rotating joint, and the vacuum rotating joint is connected to the vacuum generating device through a vacuum tube, and one end of the embryo unloading plate is provided with an air supply pipe connected to the blowing port, and the other end of the air supply pipe is connected to the air storage tank, and the other end of the embryo unloading plate is provided with a connecting seat for connecting a robot.

[0012] Preferably, the air supply pipe is connected to the air storage tank via a main air pipe, and an air blowing pipe is further provided at one end of the main air pipe connected to the air supply pipe;

[0013] It also includes a dehumidification pipe, the middle part of which is connected to the other end of the blowing pipe, and the two ends of the dehumidification pipe are respectively a first dehumidification port and a second dehumidification port, the first dehumidification port is used for blowing and dehumidifying the robot, and the second dehumidification port is used for blowing and dehumidifying the mold.

[0014] Preferably, the first dehumidification port and the second dehumidification port are both provided with a dehumidification head, and the interior of the dehumidification head is provided with an air outlet passage extending to both ends thereof, and the cross-sectional area of ​​the air outlet passage gradually decreases in the direction away from the dehumidification pipe.

[0015] Preferably, the embryo unloading plate comprises an embryo unloading plate body, the interior of which is divided into a blowing chamber and a first vacuum chamber, the vacuum rotary joint and the embryo receiving tube are both connected to the first vacuum chamber, and the air supply pipe and the blowing port are both connected to the blowing chamber.

[0016] Preferably, the frame is provided with a driving mechanism for driving the embryo removal plate to move;

[0017] The driving mechanism comprises a driving wheel arranged at one end of the frame and a passive wheel arranged at the other end of the frame, the driving wheel and the passive wheel are connected by a belt, the embryo taking plate is connected to the belt, and the driving wheel is connected to a driving motor.

[0018] Preferably, the embryo retrieval plate comprises an embryo retrieval plate body, the interior of which is divided into a liquid cooling chamber and a second vacuum chamber, the liquid cooling chamber is used to connect to a liquid cooling system of an injection molding machine, and the vacuum generating device and the embryo retrieval cylinder are both connected to the second vacuum chamber.

[0019] Preferably, a sealing gasket is provided between the embryo receiving tube and the embryo unloading plate, and the area of ​​the sealing gasket is larger than the area of ​​the bottle mouth of the bottle preform;

[0020] The length of the embryo tube is less than the length of the bottle preform, and the embryo tube comprises a main body and a limiting part which are coaxially arranged, the limiting part is connected to the sealing gasket, and the cross section of the limiting part is a circle or a regular polygon;

[0021] When the cross section of the limiting portion is circular, the diameter of the limiting portion is larger than the diameter of the main body portion and smaller than the inner diameter of the bottle mouth of the preform;

[0022] When the cross section of the limiting portion is a regular polygon, the diameter of the circumscribed circle of the regular polygon is larger than the diameter of the main body and smaller than the inner diameter of the bottle mouth of the preform.

[0023] A preform taking device for a preform injection molding machine according to an embodiment of the present invention has the following beneficial effects compared with the prior art: a preform taking plate and a preform unloading plate are respectively provided, and a plurality of preform taking tubes for communicating with a vacuum generating device are provided on the preform taking plate, the preform unloading plate is connected to a manipulator, and a plurality of preform receiving tubes for communicating with the vacuum generating device are provided on the preform unloading plate. When the preform needs to be taken out after the mold is opened, the preform taking plate is first moved to correspond to the mold cavity on the mold, the top plate of the mold is separated from the mold core, and the preform is sent into the preform taking tube under the action of the mold ejector pin, and then the preform taking plate returns, and at this time, the bottom of the preform is connected to the preform taking tube. After that, the robot drives the unloading plate to move to the corresponding position of the preform receiving tube and the bottle preform, and extends the preform receiving tube from the bottle mouth of the preform into the interior of the bottle preform. The vacuum generating device sucks vacuum on the bottle preform. Then the robot moves the unloading plate and takes the bottle preform out of the preform taking tube. After it is completely taken out, the robot turns 90° and transfers the bottle preform to the top of the receiving bin of the injection molding machine. At this time, the bottle preform is in a vertical state with the bottle mouth facing upward. Therefore, when the bottle preform is released to the receiving bin, the bottom of the bottle preform contacts the receiving bin, thereby avoiding the damage of the bottle mouth caused by the collision between the bottle mouth and the receiving bin during the falling process of the bottle preform, thereby ensuring the quality of the final product. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The present invention is an axonometric view of a preform removal device for a preform injection molding machine.

[0025] Figure 2 This is an axonometric view from another perspective of the preform removal device for the preform injection molding machine of the present invention.

[0026] Figure 3 This is an axonometric view of the connection between the embryo unloading plate and the main air duct of the present invention.

[0027] Figure 4 This is a front view of the connection between the embryo unloading plate and the main air duct of the present invention.

[0028] Figure 5 It is a schematic structural diagram of the connection between the embryo receiving tube and the embryo unloading plate of the present invention.

[0029] Among them: 1-frame, 2-embryo unloading plate, 21-blowing port, 3-embryo taking plate, 4-vacuum generating device, 5-embryo receiving tube, 51-main body, 52-limiting part, 6-vacuum tube, 7-gas storage tank, 8-vacuum rotary joint, 9-air supply pipe, 10-main air pipe, 20-blowing pipe, 30-dehumidification pipe, 40-dehumidification head, 50-driving mechanism, 501-driving wheel, 502-passive wheel, 503-belt, 504-driving motor, 60-sealing pad, 70-connecting seat, 100-bottle embryo. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0031] It should be noted that in this application, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0033] like Figure 1-2 As shown, a preform removal device for a preform injection molding machine according to a preferred embodiment of the present invention is provided on the preform injection molding machine with a mold for injection molding preforms, and the preform removal device comprises a frame 1, a preform removal plate 2 for connecting a manipulator, a preform removal plate 3 movably arranged on the frame 1 along the length direction of the frame 1, and a vacuum generating device 4 arranged on the frame 1, wherein the vacuum generating device 4 is a vacuum pump. The frame 1 may be a frame of the preform injection molding machine, or may be a separate frame 1.

[0034] The embryo removal plate 3 is provided with a plurality of embryo removal cylinders for communicating with the vacuum generating device 4, and the embryo removal cylinders are used to sleeve the bottom of the bottle embryo 100 to be removed from the mold and remove the bottle embryo 100 from the mold;

[0035] The embryo unloading plate 2 is provided with a plurality of embryo receiving tubes 5 connected with the vacuum generating device 4. Under the action of the manipulator, the embryo receiving tubes 5 extend from the mouth of the bottle preform 100 into the interior of the bottle preform 100 and take the bottle preform 100 out of the embryo taking tube.

[0036] In the preform removal device for a preform injection molding machine based on the above technical features, when the preform 100 needs to be removed after the mold is opened, the preform removal plate 3 is first moved to correspond to the mold cavity on the mold, the top plate of the mold is separated from the mold core, and the preform 100 is sent into the preform removal cylinder under the action of the mold ejector pin, and then the preform removal plate 3 returns, and at this time, the bottom of the preform 100 is connected to the preform removal cylinder. Afterwards, the robot drives the unloading plate 2 to move to the embryo receiving tube 5 corresponding to the bottle preform, and extends the embryo receiving tube 5 from the bottle mouth of the bottle preform 100 into the interior of the bottle preform 100, and the vacuum generating device 4 sucks the vacuum on the bottle preform 100. Then the robot moves the unloading plate 2 and takes the bottle preform 100 out of the embryo taking tube. After it is completely taken out, the robot turns 90° and transfers the bottle preform 100 to the top of the receiving bin of the injection molding machine. At this time, the bottle preform 100 is in a vertical state with the bottle mouth facing upward. Therefore, when the bottle preform is released to the receiving bin, the bottom of the bottle preform 100 contacts the receiving bin, thereby avoiding the bottle mouth of the bottle preform 100 colliding with the receiving bin during the falling process, thereby ensuring the quality of the final product.

[0037] Therefore, the present application changes the bottle mouth of the preform 100 from facing downward to facing bottom downward during the release phase, so that the bottle mouth of the preform 100 contacts the receiving bin first, and then the bottle bottom of the preform 100 contacts the receiving bin first, thereby avoiding damage to the bottle mouth of the preform 100.

[0038] Please see attached Figure 3 , 4 In the actual working process, the mold still has a certain temperature (about 45°C) when it is opened. However, due to the low temperature of the robot, condensed water will be generated on the surface of the robot during the embryo removal process. The condensed water will adhere to the preform 100 during the movement of the robot, and may even adhere to the mold, affecting the subsequent product quality. Therefore, the preform 100, the robot and the mold need to be dehumidified during the embryo removal process to ensure the quality of the final product.

[0039] Specifically, in this embodiment, the frame 1 is further provided with a gas tank 7, and the unloading plate 2 is provided with a blowing port 21 corresponding to the embryo receiving tube 5, and the blowing port 21 is connected with the gas tank 7 to guide the gas in the gas tank 7 to the outer surface of the preform 100. After the preform 100 is transported to the embryo receiving tube 5, the blowing port 21 blows air to the outer surface of the preform 100 to blow away the condensed water on the surface of the preform 100. At the same time, in order to ensure that the condensed water on the preform 100 is completely blown away, each embryo receiving tube 5 is correspondingly provided with two blowing ports 21, and the two blowing ports 21 are respectively arranged on both sides of the embryo receiving tube 5, so as to ensure that the outer surface of the preform 100 can be completely dried. In addition, considering the specific setting mode of the mold cavity of the mold, the embryo receiving tube 5 adopts the same arrangement mode as the mold cavity of the mold, that is, the embryo receiving tube 5 is arranged in a rectangular array, so the unloading plate 2 is preferably rectangular. Similarly, the embryo taking cylinders are also arranged in a rectangular array and are arranged one by one in correspondence with the mold cavities of the mold. The embryo taking plate 3 is preferably rectangular.

[0040] In this embodiment, the embryo unloading plate 2 has two surfaces arranged opposite to each other, the embryo receiving tube 5 is arranged on one surface of the embryo unloading plate 2, and the other surface of the embryo unloading plate 2 is provided with a vacuum rotary joint 8, and the vacuum rotary joint 8 is connected to the vacuum generating device 4 through a vacuum tube 6. Since the embryo unloading plate 2 needs to be flipped 90° under the action of the manipulator after taking the embryo, so as to ensure that the bottle preform 100 is vertical and the bottle mouth faces upward before falling into the receiving bin, the embryo unloading plate 2 is connected through the vacuum rotary joint 8 to ensure that the embryo unloading plate 2 will not interfere with the vacuum tube 6 during the flipping process. At the same time, in order to realize the blowing of the blowing port 21, one end of the embryo unloading plate 2 is provided with an air supply pipe 9 connected to the blowing port 21, and the other end of the air supply pipe 9 is connected to the gas storage tank 7. A valve is provided on the air supply pipe 9 to ensure that the bottle preform 100 is blown in real time according to needs. In addition, in order to facilitate the connection between the embryo unloading plate 2 and the robot, the other end of the embryo unloading plate 2 is provided with a connecting seat 70 for connecting to the robot.

[0041] Since the embryo unloading plate 2 needs to be connected to the vacuum tube 6 and the air supply pipe 9 at the same time, in order to ensure the respective work of vacuuming and blowing, the embryo unloading plate 2 includes an embryo blowing plate body, the interior of which is divided into a blowing chamber and a first vacuum chamber, the vacuum rotary joint 8 and the embryo receiving tube 5 are both connected to the first vacuum chamber, the air supply pipe 9 and the blowing port 21 are both connected to the blowing chamber, so that the adsorption and blowing of the bottle preforms 100 by the embryo unloading plate 2 are independent and do not interfere with each other.

[0042] As can be seen from the above, the blowing port 21 can blow air to the preform 100 on the preform unloading plate 2, but cannot blow air to the manipulator and the mold. In order to achieve simultaneous blowing to the manipulator and the mold, the air supply pipe 9 is connected to the gas storage tank 7 through the main air pipe 10, and the end of the main air pipe 10 connected to the air supply pipe 9 is also provided with a blowing pipe 20. If the end of the main air pipe 10 away from the gas storage tank 7 is provided with a three-way joint, the blowing pipe 20 and the air supply pipe 9 are both connected to the three-way joint. At the same time, a dehumidification pipe 30 is also required to be provided, the middle part of the dehumidification pipe 30 is connected to the end of the blowing pipe 20 away from the end of the blowing pipe 20, and the two ends of the dehumidification pipe 30 are respectively a first dehumidification port and a second dehumidification port, the first dehumidification port is used to blow and dehumidify the manipulator, and the second dehumidification port is used to blow and dehumidify the mold, thereby achieving simultaneous blowing to the manipulator and the mold during the preform removal process, removing condensed water on the manipulator and the mold, and effectively ensuring the subsequent product quality.

[0043] In this embodiment, in order to ensure the dehumidification effect on the manipulator and the mold, a dehumidification head 40 is provided on the first dehumidification port and the second dehumidification port. The dehumidification head 40 is provided with an air outlet channel extending to both ends thereof. The cross-sectional area of ​​the air outlet channel gradually decreases in the direction away from the dehumidification pipe 30. Therefore, in the process of the air flow flowing from the dehumidification pipe 30 through the dehumidification head 40, the air flow rate will gradually increase, thereby improving the effect of blowing off the condensed water. In addition, a boost valve can be provided on the air blowing pipe 20 to increase the pressure of the air flow and further ensure the effect of blowing off the condensed water.

[0044] In this embodiment, the embryo taking plate 3 includes an embryo taking plate body, the interior of which is divided into a liquid cooling chamber and a second vacuum chamber, and the liquid cooling chamber is used to connect to the liquid cooling system of the injection molding machine. Since the mold still has a certain temperature when the mold is opened, that is, when the embryo taking plate 3 takes away the bottle embryo 100, the bottle embryo 100 still has a certain temperature, which will be transmitted to the embryo taking plate 3, so that the temperature of the embryo taking plate 3 increases, affecting the position accuracy of the embryo taking tube. By setting a liquid cooling chamber on the embryo taking plate 3 to connect to the liquid cooling system of the injection molding machine, the embryo taking plate 3 can be cooled to ensure the normal operation of the embryo taking plate 3 and the position accuracy of the embryo taking tube. The vacuum generating device 4 and the embryo taking tube are both connected to the second vacuum chamber, thereby realizing the connection between the vacuum generating device 4 and the embryo taking tube.

[0045] In addition, two gas storage tanks 7 can be provided, one for dehumidification, that is, connected to the main air duct 10, and the other gas storage tank 7 can be connected to the embryo unloading plate 2 and the embryo taking plate 3. Since the embryo unloading plate 2 and the embryo taking plate 3 both take the embryos by vacuuming and adsorption, it is necessary to break the vacuum when unloading the embryos to ensure that the bottle preforms 100 fall off, so the gas can be transported to the first vacuum chamber and the second vacuum chamber through the other gas storage tank 7 to break the vacuum of the bottle preforms 100. At the same time, two vacuum pumps can also be provided, respectively connected to the embryo taking plate 3 and the embryo unloading plate 2, so that the vacuuming processes of the embryo taking plate 3 and the embryo unloading plate 2 are independent of each other. Of course, when one vacuum pump is provided, it is only necessary to set the corresponding valve on the corresponding pipeline.

[0046] In this embodiment, during the mold closing process, the embryo taking plate 3 is located on one side of the mold. When the mold is opened, the embryo taking plate 3 needs to be moved to correspond to the mold cavity, so the frame 1 also needs to be provided with a driving mechanism 50 for driving the embryo taking plate 3 to move. Specifically, the driving mechanism 50 includes a driving wheel 501 provided at one end of the frame 1 and a passive wheel 502 provided at the other end of the frame 1. The driving wheel 501 and the passive wheel 502 are connected by a belt 503. The embryo taking plate 3 is connected to the belt 503. The driving wheel 501 is connected to a driving motor 504. When the driving motor 504 is started, the driving wheel 501 is driven to drive the belt 503 to move, and the belt 503 drives the embryo taking plate 3 to move. In actual production, the number of the driving mechanisms 50 can be increased according to specific conditions, such as using two sets of the driving mechanisms 50 arranged in an upper and lower manner, respectively connected to the upper and lower parts of the embryo taking plate 3, to ensure the movement stability of the embryo taking plate 3. In addition, guide mechanisms such as slide rails and slide seats may be provided between the frame 1 and the embryo removal plate 3, which not only increases the movement stability of the embryo removal plate 3 but also ensures its high movement precision, thereby ensuring the corresponding precision with the mold cavity of the mold.

[0047] In this embodiment, the embryo receiving tube 5 is extended from the mouth of the preform 100 into the interior of the preform 100. In order to realize the vacuuming of the interior of the preform 100 through the embryo receiving tube 5, it is necessary to ensure the sealing between the mouth of the preform 100 and the preform removal plate 3. Preferably, a sealing gasket 60 is provided between the embryo receiving tube 5 and the preform unloading plate 2. The area of ​​the sealing gasket 60 is larger than the area of ​​the mouth of the preform 100, so that the end face of the mouth of the preform 100 fits the sealing gasket 60, ensuring the sealing of the interior of the preform 100. In addition, in order to facilitate the embryo receiving tube 5 to extend from the mouth of the preform into the interior of the preform 100, the end of the embryo receiving tube 5 away from the preform unloading plate 2 needs to be smaller than the inner diameter of the mouth of the bottle, and the length of the embryo receiving tube 5 is smaller than the length of the preform 100. Meanwhile, although the preform 100 is first vacuumed and then separated from the preform taking plate 3 when connected with the embryo receiving tube 5, the center line of the preform 100 coincides with the center line of the embryo receiving tube 5 under normal circumstances, when the preform 100 is connected with the embryo receiving tube 5, there is a situation where the preform 100 falls down, causing the inner wall of the preform 100 to abut against the outer wall of the embryo receiving tube 5. At this time, if the diameter of the embryo receiving tube 5 is too small, the distance between the lower side of the preform 100 and the center of the embryo receiving tube 5 is the diameter of the preform 100 minus the radius of the embryo receiving tube 5. Since the diameter of the embryo receiving tube 5 is small, the distance between the lower side of the preform 100 and the center of the embryo receiving tube 5 will be large, so that the size of the sealing gasket 60 needs to be increased to ensure that the bottle mouth of the preform 100 is completely fitted with the sealing gasket 60.

[0048] Please see attached Figure 5 In order to balance the above two situations, the embryo tube 5 can be configured to include a main body 51 and a limiting part 52 that are coaxially arranged. The limiting part 52 is connected to the sealing gasket 60, that is, when the bottle embryo 100 falls, the inner wall of the bottle embryo 100 abuts against the outer wall of the limiting part 52, so that the limiting part 52 can be configured to have a cross-sectional area larger than the cross-sectional area of ​​the main body 51, thereby ensuring convenient connection with the bottle embryo 100, and not needing to set the sealing gasket 60 too large. In the specific configuration, the cross-sectional area of ​​the limiting part 52 can be set to be circular or regular polygonal;

[0049] When the cross section of the limiting portion 52 is circular, the diameter of the limiting portion 52 is larger than the diameter of the main body 51 and slightly smaller than the inner diameter of the mouth of the preform 100, so that even if the preform 100 falls, the center line of the preform 100 roughly coincides with the center line of the embryo tube 5, so there is no need to increase the size of the sealing gasket 60. At the same time, since the diameter of the limiting portion 52 is smaller than the inner diameter of the mouth of the preform 100, it will not affect the connection and separation of the preform 100 and the embryo tube 5. The outer diameter of the main body 51 can be appropriately reduced under the premise of ensuring vacuum, so as to facilitate docking with the inner diameter of the mouth of the preform 100.

[0050] When the cross section of the limiting portion 52 is a regular polygon, the diameter of the circumscribed circle of the regular polygon formed by the cross section of the limiting portion 52 is larger than the diameter of the main body 51 and slightly smaller than the inner diameter of the bottle mouth of the preform 100. The effect of this arrangement is the same as that of the cross section of the limiting portion 52 being a circle.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A preform removal device for a preform injection molding machine, wherein the preform injection molding machine is provided with a mold for molding preforms, characterized in that: It includes a frame, a embryo unloading plate for connecting a manipulator, an embryo taking plate movably arranged on the frame along the length direction of the frame, and a vacuum generating device arranged on the frame; The embryo removal plate is provided with a plurality of embryo removal cylinders for communicating with the vacuum generating device, and the embryo removal cylinders are used to sleeve the bottom of the bottle embryo to be removed from the mold and remove the bottle embryo from the mold; The unloading plate is provided with a plurality of embryo receiving tubes connected with the vacuum generating device. Under the action of the manipulator, the embryo receiving tubes extend from the bottle mouth of the bottle preform into the interior of the bottle preform and take the bottle preform out of the embryo taking tube.

2. The preform removal device for a preform injection molding machine according to claim 1, characterized in that: The frame is also provided with a gas storage tank, and the unloading plate is provided with an air blowing port corresponding to the embryo receiving tube, and the air blowing port is connected with the gas storage tank to guide the gas in the gas storage tank to the outer surface of the bottle embryo.

3. The preform removal device for a preform injection molding machine according to claim 2, characterized in that: The embryo receiving tubes are arranged in a rectangular array, and each embryo receiving tube is correspondingly provided with two blowing ports, and the two blowing ports are respectively arranged on both sides of the corresponding embryo receiving tube.

4. The preform removal device for a preform injection molding machine according to claim 2, characterized in that: The embryo unloading plate has two surfaces arranged opposite to each other, the embryo receiving tube is arranged on one surface of the embryo unloading plate, and a vacuum rotating joint is arranged on the other surface of the embryo unloading plate, and the vacuum rotating joint is connected to the vacuum generating device through a vacuum tube, and an air supply pipe connected to the air blowing port is arranged at one end of the embryo unloading plate, and the other end of the air supply pipe is connected to the air storage tank, and a connecting seat for connecting a manipulator is arranged at the other end of the embryo unloading plate.

5. The preform removal device for a preform injection molding machine according to claim 4, characterized in that: The air supply pipe is connected to the air storage tank via a main air pipe, and an air blowing pipe is also provided at one end of the main air pipe connected to the air supply pipe; It also includes a dehumidification pipe, the middle part of which is connected to the other end of the blowing pipe, and the two ends of the dehumidification pipe are respectively a first dehumidification port and a second dehumidification port, the first dehumidification port is used for blowing and dehumidifying the robot, and the second dehumidification port is used for blowing and dehumidifying the mold.

6. The preform removal device for a preform injection molding machine according to claim 5, characterized in that: The first dehumidification port and the second dehumidification port are both provided with a dehumidification head, and the interior of the dehumidification head is provided with an air outlet passage extending to both ends thereof, and the cross-sectional area of ​​the air outlet passage gradually decreases in the direction away from the dehumidification pipe.

7. The preform removal device for a preform injection molding machine according to claim 4, characterized in that: The embryo unloading plate comprises an embryo unloading plate body, the interior of which is divided into a blowing chamber and a first vacuum chamber, the vacuum rotary joint and the embryo receiving pipe are both connected to the first vacuum chamber, and the air supply pipe and the blowing port are both connected to the blowing chamber.

8. The preform removal device for a preform injection molding machine according to any one of claims 1 to 7, characterized in that: The frame is provided with a driving mechanism for driving the embryo removal plate to move; The driving mechanism comprises a driving wheel arranged at one end of the frame and a passive wheel arranged at the other end of the frame, the driving wheel and the passive wheel are connected by a belt, the embryo taking plate is connected to the belt, and the driving wheel is connected to a driving motor.

9. The preform removal device for a preform injection molding machine according to any one of claims 1 to 7, characterized in that: The embryo retrieval plate comprises an embryo retrieval plate body, the interior of which is divided into a liquid cooling chamber and a second vacuum chamber, the liquid cooling chamber is used to connect to a liquid cooling system of an injection molding machine, and the vacuum generating device and the embryo retrieval cylinder are both connected to the second vacuum chamber.

10. The preform removal device for a preform injection molding machine according to any one of claims 1 to 7, characterized in that: A sealing gasket is provided between the embryo receiving tube and the embryo unloading plate, and the area of ​​the sealing gasket is larger than the bottle mouth area of ​​the bottle preform; The length of the embryo tube is less than the length of the bottle preform, and the embryo tube comprises a main body and a limiting part which are coaxially arranged, the limiting part is connected to the sealing gasket, and the cross section of the limiting part is a circle or a regular polygon; When the cross section of the limiting portion is circular, the diameter of the limiting portion is larger than the diameter of the main body portion and smaller than the inner diameter of the bottle mouth of the preform; When the cross section of the limiting portion is a regular polygon, the diameter of the circumscribed circle of the regular polygon is larger than the diameter of the main body and smaller than the inner diameter of the bottle mouth of the preform.

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