A preform four-station extraction plate

Abstract

This invention relates to the field of preform production technology, and in particular to a four-station preform removal plate, comprising a plate body with four adsorption areas on the end face of the plate body. Each adsorption area is provided with several sleeves, and an air chamber is provided on the inner side of each area of ​​the plate body. The air chambers are connected to an external air source through pipes. Furthermore, air holes are provided on the end face of the plate body defined by the sleeves. This invention, by employing a four-station design, enables sequential adsorption and removal of preforms from the four cavities of the injection molding machine, thereby improving the efficiency and convenience of material removal. Secondly, air ducts connected to the air holes are provided on the sleeves, enabling cooling of the preform's outer wall during the adsorption and movement of the preform, thus improving the preform's cooling efficiency. In addition, by employing elastic components and air storage components, when the vacuum is lost, the preform can be pushed outwards, enabling convenient unloading of the preform.

Description

Technical Field

[0001] This invention relates to the field of preform production technology, and in particular to a four-station preform removal plate. Background Technology

[0002] With the continuous improvement of the production efficiency of PET preform injection molding machines, the quality and efficiency of the preform unloading mechanism are also required to improve accordingly. This is mainly reflected in the fact that the robot arm can unload more preforms at a time, the time required is shorter, the quality control of the preforms is higher, and the cooling effect of the preforms is better. After the robot arm carries the take-out plate into the mold to remove the preform, it rotates to a horizontal position and then the preform is ejected by a cylinder. Under the action of the cylinder's ejection force and gravity, the preform falls onto the conveyor belt surface.

[0003] To improve the removal efficiency of injection molding machines, existing technologies design the removal plate as a four-station structure, which allows for sequential unloading of materials from the four mold cavities of the injection molding machine through four adsorption areas. For example, the four-station air-cooled unloading system disclosed in Chinese Patent Publication No. CN205219585U includes a frame, on which a cooling system, a vacuum pump, a blank-picking mechanism, and an unloading mechanism are installed. The blank-picking mechanism includes a crossbeam mounted on the frame, a blank-picking slider seat, a blank-picking servo motor, and a four-station blank-picking plate. Each blank-picking rod on the four-station blank-picking plate is connected to the cooling system. The unloading mechanism includes a four-station unloading plate and a flipping mechanism.

[0004] Since most current preform removal plates use vacuum direct adsorption to fix the preform during the removal process, it is not convenient to cool the preform during the movement. This results in a long cooling time for the preform and a greater possibility of deformation. Therefore, in order to solve the above problems, we propose a four-station preform removal plate. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings in the prior art by proposing a four-station preform removal plate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] Design a preform four-station take-out plate, including a plate body, with four adsorption areas on the end face of the plate body, and several sleeves provided in each adsorption area. The plate body has an air cavity on the relatively inner side of each of the areas, and the air cavity is connected to an external air source through a pipe.

[0008] The plate body is provided with air holes on the end face defined by the sleeve, and the air holes are connected to the air cavity. A cooling structure is also provided on the inner wall of the sleeve, and the cooling structure is used to cool the outer wall of the preform.

[0009] Furthermore, the cooling structure includes a through hole on the outside of the sleeve, and an air duct is provided on the inner wall of the sleeve. One end of the air duct communicates with the through hole, and the other end extends to the bottom of the sleeve and communicates with the air hole.

[0010] Furthermore, an elastic component is provided inside the sleeve, which is used for contact with the preform.

[0011] Furthermore, the elastic component includes a spring fixedly installed inside the sleeve, and a retaining ring is fixedly installed on the free end of the spring.

[0012] Furthermore, a gas storage component is provided inside the gas cavity. The gas storage component is used to store gas when the sleeve adsorbs the bottle preform and to blow the bottle preform outward when adsorption stops.

[0013] Furthermore, the gas storage assembly includes a piston plate slidably connected to the gas chamber, and a tension spring is provided between the piston plate and the gas chamber. The surface of the plate also has an air inlet hole communicating with the piston plate and the gas chamber. A first one-way valve is provided in the air inlet hole. An air passage is provided between the gas chamber and the air inlet hole, and a second one-way valve is provided in the air passage.

[0014] Furthermore, two piston plates are arranged opposite each other in each air chamber, and a telescopic rod is fixedly connected between the piston plate and the inner wall of the air chamber.

[0015] Furthermore, four filter boxes are fixedly installed on the back end of the plate. The air chamber is connected to the filter boxes, and the filter boxes are connected to an external air source through connectors. A filter screen can also be detachably connected to the inside of the filter box.

[0016] Furthermore, the air duct has a groove-shaped structure, and several air guide plates are provided on the inner side of the air duct. The upper surface of the air guide plate is inclined, and the free end does not protrude from the inner wall of the sleeve.

[0017] Furthermore, mounting wings are provided on both sides of the plate, and several fixing holes are provided on the mounting wings.

[0018] The four-station preform removal plate proposed in this invention has the following advantages: Firstly, the four-station design allows for sequential adsorption and removal of preforms from the four mold cavities of the injection molding machine, improving efficiency and convenience. Secondly, the sleeve is equipped with an air duct connected to the air vent, enabling cooling of the preform's outer wall during the adsorption and movement process, thus improving cooling efficiency. Furthermore, the use of elastic and air storage components allows the preform to be pushed outwards when the vacuum is lost, facilitating convenient preform unloading. Attached Figure Description

[0019] Figure 1 The three-dimensional representation of the present invention Figure 1 ;

[0020] Figure 2 The three-dimensional representation of the present invention Figure 2 ;

[0021] Figure 3 This is a cross-sectional view of the plate body of the present invention;

[0022] Figure 4 for Figure 3 A magnified structural diagram of area A;

[0023] Figure 5 This is a schematic diagram of the air duct structure of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the filter screen of the present invention;

[0025] Figure 7 This is a schematic diagram of the piston plate of the present invention.

[0026] In the diagram: 1. Plate; 11. Mounting wing; 2. Sleeve; 3. Air chamber; 4. Air hole; 5. Cooling structure; 51. Through hole; 52. Air duct; 521. Air guide plate; 6. Elastic component; 61. Spring; 62. Retaining ring; 7. Air storage component; 71. Piston plate; 72. Tension spring; 73. Air inlet; 74. First one-way valve; 75. Second one-way valve; 76. Telescopic rod; 8. Filter box; 81. Filter screen. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0028] Reference Figure 1-6 As one embodiment of the present invention, a four-station preform removal plate is disclosed. In the prior art, the removal plate is mounted on a robotic arm to realize the reciprocating feeding of the preform in the injection molding mechanism.

[0029] The extraction plate includes a plate body 1, which has four adsorption areas on its end face. The four areas are used to achieve the technical effect of four-station material extraction, which can simultaneously and sequentially discharge materials into the four cavities of the injection molding machine to speed up the material discharge. Several sleeves 2 are provided in each adsorption area. Air chambers 3 are opened on the relatively inner side of each area of ​​the plate body 1. The air chambers 3 are connected to an external air source through pipes. The external air source can be a vacuum pump for vacuum adsorption.

[0030] The plate 1 is provided with an air hole 4 on the end face defined by the sleeve 2. The air hole 4 is connected to the air cavity 3. A cooling structure 5 is also provided on the inner wall of the sleeve 2. The cooling structure 5 is used to cool the outer wall of the preform.

[0031] In other words, in this invention, after negative pressure is applied to the outside of the plate 1 through the air holes 4, negative pressure adsorption of the bottle preform can be achieved, and the feeding operation of the preform can be realized. At the same time, the cooling structure 5 can be used to cool the outer wall of the preform simultaneously during the adsorption process. The specific cooling method will be described in detail later.

[0032] Reference Figure 5 Specifically, in some embodiments, the cooling structure 5 of the present invention includes a through hole 51 opened on the outside of the sleeve 2. The through hole 51 is through-hole. An air duct 52 is provided on the inner wall of the sleeve 2. One end of the air duct 52 is connected to the through hole 51, and the other end extends to the bottom of the sleeve 2 and is connected to the air hole 4. That is, when the preform is adsorbed to the inside of the sleeve 2, the preform is adsorbed and fixed by the air hole 4 on the body 1. At the same time, since the air hole 4 is also connected to the air duct 52, during the adsorption process, the air hole 4 will draw cold air from the outside through the through hole 51 and the air duct 52. After the gas in the air duct 52 flows, it will carry away the heat on the surface of the preform, thus realizing the rapid cooling of the surface of the preform.

[0033] Reference Figure 3 , 4 Furthermore, considering the need for convenient feeding of the preform during the feeding process, the present invention includes an elastic component 6 on the inner side of the sleeve 2, which is used for contact with the preform.

[0034] Reference Figure 4 For example, in this embodiment, the elastic component 6 includes a spring 61 fixedly installed inside the sleeve 2. A retaining ring 62 is fixedly installed on the free end of the spring 61. The retaining ring 62 can be made of rubber. Its purpose is to provide flexible stop protection for the end of the preform, so as to avoid a hard impact with the sleeve 2 during the negative pressure adsorption process. In addition, during the feeding process, under the negative pressure traction of the air hole 4, the preform will move to one side of the sleeve 2 to squeeze the spring 61. When the negative pressure stops, the preform can be pushed outward further by the elastic force stored in the spring 61, thus realizing the convenient feeding operation of the preform.

[0035] Reference Figure 4In addition, in this invention, an air storage component 7 is provided inside the air cavity 3. The air storage component 7 is used to store air when the sleeve 2 adsorbs the bottle preform and blow the bottle preform outward when adsorption stops. That is to say, in this invention, not only is there an elastic component 6 to assist in feeding, but also an air blowing feeding auxiliary structure, which effectively improves the stability of feeding the bottle preform.

[0036] In some embodiments, the gas storage assembly 7 includes a piston plate 71 slidably connected to the gas chamber 3. In this embodiment, in order to ensure the sealing of the piston plate 71, a sealing ring is provided around the piston plate 71. A tension spring 72 is also provided between the piston plate 71 and the gas chamber 3. The tension spring 72 is used to reset the piston plate 71 after it moves. The plate body 1 also has an air inlet 73 communicating with the piston plate 71 and the gas chamber 3. A first one-way valve 74 is provided in the air inlet 73. An air passage is also provided between the gas chamber 3 and the air inlet 4. A second one-way valve 75 is provided in the air passage.

[0037] In summary, in this invention, when it is necessary to remove the preform from the injection molding machine, the movement of the plate 1 in this invention can be coordinated by a robotic arm. Due to the four-station design, material can be continuously removed from the four cavities of the injection molding machine. After material removal, the plate 1 moves to the unloading mechanism for unloading. The unloading mechanism, such as a conveying mechanism or a reversing mechanism, uses a vacuum pump to create negative pressure suction on the air holes 4 during the material removal process to adsorb and fix the preform. During this process, since the inner side of the sleeve 2 is also provided with an air duct 52, external cold air can be introduced into the sleeve 2, thus... This allows for rapid cooling of the preform, saving subsequent cooling time. During adsorption, the piston plate 71 moves due to the negative pressure, drawing in and storing external air through the inlet 73. During the feeding process, the vacuum pump is first shut off, eliminating the negative pressure in the air chamber 3. Under the push of the spring 61, the preform moves outward. Simultaneously, the tension spring 72 pulls the piston plate 71, which discharges the attracted pressure into the air hole 4 through the second one-way valve 75. This further enables air blowing and feeding of the preform, improving feeding efficiency.

[0038] Furthermore, in this invention, two piston plates 71 are arranged opposite each other in each air chamber 3. A telescopic rod 76 is fixedly connected between the piston plate 71 and the inner wall of the air chamber 3. The designed telescopic rod 76 is used to guide the piston plate 71 to move and extend. The design of two piston plates 71 can increase the blowing force on the sleeve 2.

[0039] Furthermore, in order to block impurities during the adsorption process, four filter boxes 8 are fixedly installed on the back end of the plate 1. The air chamber 3 is connected to the filter boxes 8, and the filter boxes 8 are connected to an external air source through connectors. Specifically, a solenoid valve is installed on the connector to isolate the air path and prevent gas from escaping when the piston plate 71 moves. A filter screen 81 can also be detachably connected to the inside of the filter box 8. The filter screen 81 can be fixed by bolts or clips, which are conventional techniques for those skilled in the art and will not be described in detail here. After a period of operation, the filter screen 81 can be disassembled and cleaned to prevent dust from accumulating on the surface of the filter screen 81 and affecting the air passage.

[0040] Furthermore, in this invention, the air duct 52 has a groove-shaped structure, and a plurality of air guide plates 521 are provided on the inner side of the air duct 52. The upper surface of the air guide plate 521 is inclined, and the free end does not protrude from the inner wall of the sleeve 2. Specifically, in this embodiment, the air guide plate 521 is used to guide the introduced cold air to flow sequentially to the surface of the bottle preform, thereby improving the cooling efficiency of the bottle preform surface.

[0041] It should be noted that, in this invention, mounting wings 11 are provided on both sides of the plate 1, and the mounting wings 11 are provided with a plurality of fixing holes.

[0042] In summary, the present invention employs a four-station design, enabling sequential adsorption and material handling of the four mold cavities of the injection molding machine, thereby improving the efficiency and convenience of material handling. Secondly, an air duct 52 connected to the air hole 4 is provided on the sleeve 2, which can achieve cooling of the outer wall of the preform during the adsorption and movement of the preform, thus improving the cooling efficiency of the preform. In addition, the present invention employs the design of the elastic component 6 and the air storage component 7, which can push the preform outward when the vacuum is lost, enabling convenient unloading of the preform.

[0043] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A preform four-station take-out plate, comprising a plate body (1), having four adsorption areas on the end face of the plate body (1), and having a plurality of sleeves (2) in each adsorption area, characterized in that: The plate (1) has an air cavity (3) on the inner side of each of the regions, and the air cavity (3) is connected to an external air source through a pipe; Among them, the plate (1) is provided with an air hole (4) on the end face defined by the sleeve (2), the air hole (4) is connected to the air cavity (3), and a cooling structure (5) is provided on the inner wall of the sleeve (2), the cooling structure (5) is used to cool the outer wall of the preform; The elastic component (6) includes a spring (61) fixedly installed inside the sleeve (2), and a retaining ring (62) fixedly installed on the free end of the spring (61); a gas storage component (7) is also provided inside the gas chamber (3), which is used to store gas when the sleeve (2) adsorbs the bottle preform, and blow the bottle preform outward when adsorption stops; the gas storage component (7) includes a piston plate (71) slidably connected in the gas chamber (3), and a tension spring (7) is also provided between the piston plate (71) and the gas chamber (3). 2), wherein, on the surface of the plate (1), there is an air inlet (73) connecting the piston plate (71) and the air chamber (3), a first one-way valve (74) is provided in the air inlet (73), and an air passage is provided between the air chamber (3) and the air hole (4), and a second one-way valve (75) is provided in the air passage; two piston plates (71) are provided opposite to each air chamber (3), wherein a telescopic rod (76) is fixedly connected between the piston plate (71) and the inner wall of the air chamber (3).

2. The preform four-station take-out plate according to claim 1, characterized in that: The cooling structure (5) includes a through hole (51) on the outside of the sleeve (2) and an air duct (52) on the inner wall of the sleeve (2). One end of the air duct (52) is connected to the through hole (51), and the other end extends to the bottom of the sleeve (2) and is connected to the air hole (4).

3. The preform four-station take-out plate according to claim 1, characterized in that: An elastic component (6) is located inside the sleeve (2), which is used for contact with the preform.

4. The preform four-station take-out plate according to claim 1, characterized in that: Four filter boxes (8) are also fixedly installed on the back end of the plate (1). The air chamber (3) is connected to the filter box (8). The filter box (8) is connected to an external air source through a connector. A filter screen (81) can also be detachably connected to the inside of the filter box (8).

5. A preform four-station take-out plate according to any one of claims 2-4, characterized in that: The air duct (52) has a groove-shaped structure, and several air guide plates (521) are also provided on the inner side of the air duct (52). The upper surface of the air guide plate (521) is inclined, and the free end does not protrude from the inner wall of the sleeve (2).

6. A preform four-station take-out plate according to claim 5, characterized in that: Mounting wings (11) are provided on both sides of the plate (1), and several fixing holes are provided on the mounting wings (11).

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