Vacuum valve block gas circuit structure and condensate bead packaging machine

Abstract

The invention discloses a vacuum valve block gas circuit structure and a condensate bead packaging machine, and belongs to the technical field of packaging machines. The vacuum block is fixedly arranged on the rack and provided with a vacuum cavity and a vacuum opening, and the vacuum opening is used for being connected with a vacuum source; the mold is movably arranged on the rack, and a forming cavity is formed in the side, back on to the vacuum block, of the mold. The friction plate is arranged on the side, facing the vacuum block, of the mold in a liftable mode, a vent hole is formed in the friction plate, the vent hole can move along with the mold to communicate with the vacuum cavity, and the vent hole communicates with the forming cavity through an air pipe; and the energy storage piece is arranged between the friction plate and the mold, the energy storage piece can store downward pressure, and when the energy storage piece moves to abut against the vacuum block, the energy storage piece can release the downward pressure to push the friction plate to abut against the vacuum block for sealing. The movable mold is continuously vacuumized, so that the situation that a vacuum air path is closed by depending on a one-way valve is avoided, the problem of air leakage of the one-way valve is effectively solved, and the rapid production requirement of the condensate bead packaging machine can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging machines, in particular to a vacuum valve block gas path structure and a bead packaging machine. BACKGROUND

[0002] In the production process of the bead packaging machine, the molding of the bead mainly depends on the vacuum molding of the bottom film. Specifically, the process includes the following key steps: first, the bottom film is covered on the upper surface of the mold; then, the vacuum operation is performed through the mold cavity to adsorb the bottom film to the inside of the mold cavity, so that the bottom film can completely fit the mold cavity, thereby completing the vacuum molding of the bottom film. After that, the filler is filled into the mold cavity, and then the film is sealed on the bottom film, so that the bottom film and the film wrap the filler together, and finally the bead is formed through the cutting process. In the entire production process, the vacuum molding process of the bottom film is particularly critical.

[0003] The vacuum gas path structure of the prior art (such as CN108528839A, a circulating vacuum structure and a packaging machine) is not continuous suction vacuum. In the vacuum molding process of the bottom film, the one-way valve is relied on to automatically close the vacuum gas path when not suctioning vacuum. Under high-speed running conditions, the one-way valve is prone to wear due to frequent opening and closing, which causes the vacuum gas path to be unable to be completely closed and air leakage, thereby affecting the vacuum molding effect of the bottom film. In addition, since the one-way valve needs to be arranged in the vacuum gas path, the passageway of the vacuum gas path will be limited by the one-way valve. For example, when the pipe diameter of the vacuum gas path is 6mm, after the one-way valve with model AKH08B-02S is arranged in the vacuum gas path, the passageway of the one-way valve is only 4.2mm, and the passageway of the vacuum gas path will also become smaller. When the translation speed of the bead packaging machine is greater than 80mm / s, the bottom film is difficult to be adsorbed to the bottom of the mold cavity, thereby making the bottom film unable to be completely vacuum molded. SUMMARY

[0004] The purpose of the present application is to provide a vacuum valve block gas path structure and a bead packaging machine, which continuously suction vacuum for the moving mold, thereby avoiding the dependence on the one-way valve to close the vacuum gas path, effectively solving the problem of air leakage of the one-way valve, and meeting the rapid production demand of the bead packaging machine.

[0005] In a first aspect, the present application provides a vacuum valve block gas path structure, comprising: a rack; a vacuum block fixedly arranged on the rack, the vacuum block being provided with a vacuum cavity and a vacuum port in communication with each other, the vacuum port being used to connect a vacuum source; a mold movably arranged on the rack, the mold being provided with a molding cavity on the side opposite to the vacuum block; and a friction plate, which is liftable and disposed on a side of the mold facing the vacuum block, and is provided with a vent hole, which can move with the mold to communicate with the vacuum chamber, and the vent hole is connected to the molding cavity through an air pipe; An energy storage component is provided between the friction plate and the mold. The energy storage component can accumulate downward pressure. When the friction plate moves to abut against the vacuum block, the energy storage component can also release the downward pressure to push the friction plate and the vacuum block to abut and seal.

[0006] The vacuum valve block air path structure provided by this invention features a liftable friction plate and energy storage element. During mold movement, the friction plate maintains a tight contact with the vacuum block, achieving a dynamic abutment seal. This design ensures a reliable seal between the vacuum chamber and the vent, maintaining a stable vacuum even during mold movement.

[0007] Compared to the intermittent vacuuming methods of the prior art, which rely on a one-way valve to automatically close the vacuum air path, the vacuum valve block air path structure of the present invention achieves continuous vacuuming. This continuous vacuuming method not only ensures the stability and reliability of the vacuum level, but also effectively avoids air leakage caused by a loose one-way valve, significantly improving the vacuum forming effect of the base film.

[0008] Furthermore, by removing the restriction of the check valve, the vacuum airway diameter is increased, thereby improving vacuum suction efficiency and meeting the production requirements of high-speed condensate packaging machines. For example, when the vacuum airway diameter is 6mm, removing the AKH08B-02S check valve increases the effective diameter from 4.2mm to 6mm, enabling continuous vacuum suction at a mold translation speed of 200mm / second.

[0009] Furthermore, there are multiple vacuum blocks, and the multiple vacuum blocks are spliced ​​together and arranged on the frame.

[0010] The above technical solution, by splicing multiple vacuum blocks together to form a long vacuum zone, ensures uniform vacuum distribution throughout the entire vacuum zone. Compared to a single vacuum block, this design can better maintain a stable vacuum state and avoid poor molding caused by insufficient local vacuum.

[0011] Furthermore, multiple vacuum blocks are spliced ​​to form a first vacuum block array and a second vacuum block array arranged side by side, and the first vacuum block array and the second vacuum block array each include at least two vacuum blocks connected end to end, and the vent includes a first vent and a second vent arranged side by side, the first vent is used to communicate with the vacuum cavity of the first vacuum block array, and the second vent is used to communicate with the vacuum cavity of the second vacuum block array.

[0012] By setting the first vacuum block array and the second vacuum block array and corresponding to the first air hole and the second air hole respectively, independent vacuum control of different areas can be realized. This design allows flexible vacuum switching at different production stages or different mold positions, thereby meeting the complex molding process requirements.

[0013] Further, the tail of the vacuum cavity on the first vacuum block array and the head of the vacuum cavity on the second vacuum block array are arranged in series on the vertical projection plane. When the first air hole moves to the tail of the vacuum cavity of the first vacuum block array, the second air hole can be in communication with the head of the vacuum cavity of the second vacuum block array. By the above technical scheme, when the first air hole of the friction plate moves to the vacuum cavity position of the first vacuum block array, the mold starts to vacuum. At this time, the second air hole of the friction plate is blocked by the upper surface of the second vacuum block array and is in a closed state. With the continuous translation of the friction plate, the first air hole leaves the vacuum cavity of the first vacuum block array, and the second air hole is in communication with the vacuum cavity of the second vacuum block array, and starts to vacuum. This design realizes continuous vacuuming, ensuring the continuity and stability of vacuum adsorption, and is particularly suitable for production scenes that require long-distance continuous vacuuming.

[0014] Further, the tail of the vacuum cavity on the first vacuum block array and the head of the vacuum cavity on the second vacuum block array are arranged in series on the vertical projection plane. When the first air hole moves to the tail of the vacuum cavity of the first vacuum block array, the second air hole can be in communication with the head of the vacuum cavity of the second vacuum block array.

[0015] By the above technical scheme, by designing the two vacuum block arrays in a head-tail disconnected mode, two independent vacuum sources can be connected to the two vacuum block arrays respectively, thereby meeting different vacuum degree requirements.

[0016] Further, a plurality of the vacuum blocks are arranged in a single row in series, the spacing distance between two adjacent vacuum cavities is less than the extension length of the air hole, and when the air hole moves to the tail of one of the vacuum cavities, the head of the adjacent vacuum cavity is connected to the air hole.

[0017] By the above technical scheme, when the spacing distance between two adjacent vacuum cavities is less than the extension length of the air hole, the air hole can be seamlessly switched from one vacuum cavity to another during movement, thereby ensuring the continuity of vacuum adsorption. Continuous vacuuming is realized by a single row of vacuum blocks, which significantly improves production efficiency and is particularly suitable for high-speed production environments.

[0018] Further, the spacing distance between two adjacent vacuum cavities is greater than the extension length of the air hole.

[0019] The technical scheme above can temporarily disconnect the air vent hole from the vacuum cavity during movement when the interval distance between two adjacent vacuum cavities is greater than the extension length of the air vent hole, thereby allowing two independent vacuum sources to be connected to two different vacuum cavities, switching between two different vacuum degrees, and meeting the requirements of complex production processes.

[0020] Further, the roller is rotatably arranged at the front end of the vacuum block and protrudes from the upper surface of the vacuum block, and the roller can abut against the friction plate to push the friction plate upwards and make the energy storage member accumulate downward pressure.

[0021] The technical scheme above rotatably arranges the roller at the front end of the vacuum block and protrudes from the upper surface of the vacuum block. When the friction plate moves to the position of the roller, the roller can abut against the friction plate to smoothly push the friction plate above the vacuum block, thereby realizing the automatic lifting function of the friction plate without the need for an additional power device, and simplifying the system structure.

[0022] Further, the sealing rubber strip is arranged in the mounting groove at one end surface of the friction plate, and the plurality of molds can be moved to be arranged side by side above the vacuum cavity, and the sealing rubber strip can seal the gap between the two adjacent molds arranged side by side.

[0023] The technical scheme above arranges the sealing rubber strip in the mounting groove at one end surface of the friction plate, which can effectively seal the gap between adjacent molds, thereby improving the sealing performance between the molds and reducing the risk of vacuum leakage.

[0024] Further, the linear bearing is arranged on the mold, the guide rail is arranged on the friction plate, and the guide rail is arranged in the linear bearing in a liftable manner.

[0025] The combination of the linear bearing and the guide rail can ensure smooth linear movement of the friction plate during lifting, thereby reducing deviation and shaking during movement. This design significantly improves the lifting accuracy of the friction plate and ensures accurate abutment and sealing with the vacuum block.

[0026] Further, the energy storage member is a resilient rubber, and opposite ends of the resilient rubber abut against the friction plate and the mold, respectively.

[0027] The technical scheme above reduces the replacement frequency of the energy storage member and reduces maintenance costs due to the durability and fatigue resistance of the resilient rubber.

[0028] In a second aspect, the application provides a condensation bead packaging machine comprising the vacuum valve block gas path structure.

[0029] As can be seen from the above, the vacuum valve block gas path structure provided by the application can keep the friction plate in a pressed state with the vacuum block during the movement of the mold, so as to realize dynamic abutting sealing. This design ensures reliable sealing between the vacuum cavity and the air hole, and can maintain a stable vacuum state even when the mold is moving.

[0030] Compared with the intermittent vacuum pumping mode in the prior art which relies on the automatic closing of the one-way valve, the vacuum valve block gas path structure of the application realizes continuous vacuum pumping. This continuous vacuum pumping mode not only ensures the stability and reliability of the vacuum degree, but also effectively avoids the air leakage phenomenon caused by the poor closing of the one-way valve, thereby significantly improving the effect of the bottom film vacuum forming.

[0031] In addition, by removing the restriction of the one-way valve, the effective diameter of the vacuum gas path is also increased, thereby improving the efficiency of vacuum adsorption and meeting the production requirements of high-speed condensation bead packaging machines. For example, when the diameter of the vacuum gas path is 6 mm, after removing the one-way valve of type AKH08B-02S, the effective diameter is increased from 4.2 mm to 6 mm, which can meet the continuous vacuum pumping requirement of a mold translation speed of 200 mm / s.

[0032] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or can be learned by practice of the present application. The objects and other advantages of the present application will be realized and attained by the structure particularly pointed out in the written description and the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 An assembly structure diagram of the vacuum valve block gas path structure proposed by the application.

[0034] Figure 2 A cross-sectional structure diagram of the vacuum valve block gas path structure proposed by the application.

[0035] Figure 3 A structure top view of the vacuum valve block gas path structure proposed by the application.

[0036] Figure 4 A structure top view of the vacuum valve block gas path structure proposed by the application. Figure 2 A structure top view of the vacuum valve block gas path structure proposed by the application.

[0037] Figure 5 A structure top view of the vacuum valve block gas path structure proposed by the application. Figure 2 An assembly structure diagram of the friction plate and the mold.

[0038] Figure 6 An assembly structure diagram of the friction plate and the mold. Figure 2Structure diagram of another embodiment of the middle vacuum block.

[0039] Figure 7 For Figure 6 Structure diagram of the cross section of the middle vacuum block after abutting against the friction plate.

[0040] Figure 8 For Figure 4 Structure diagram of the cross section of the middle vacuum block after abutting against the friction plate.

[0041] In the drawings: 100, rack; 110, ring chain; 200, vacuum block; 210, vacuum cavity; 220, vacuum port; 230, first vacuum block array; 240, second vacuum block array; 300, mold; 310, forming cavity; 311, air extraction hole; 320, forming seat; 330, base; 331, connecting hole; 332, converging cavity; 400, friction plate; 410, air hole; 411, first air hole; 412, second air hole; 420, mounting groove; 500, air pipe; 510, first pipe opening; 520, second pipe opening; 600, energy storage piece; 700, roller; 800, sealing rubber strip; 910, linear bearing; 920, guide rail. DETAILED DESCRIPTION

[0042] Embodiments of the present application are described in detail below with reference to the attached drawings, which show by way of example, embodiments in which like numerals indicate like elements or elements having the same or similar function. The embodiments described below are examples only, and are not to be construed as limiting the present application.

[0043] The disclosure below provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplification, the elements of the particular examples described below are described. Of course, they are merely examples and are not intended to limit the present application. In addition, the present application can repeatedly refer to numerals and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not indicate the relationship between the various embodiments and / or settings discussed.

[0044] The vacuum valve block air path structure disclosed in the present application is mainly applied to a condensation bead packaging machine, can realize continuous vacuum suction, has a large vacuum air path diameter, forms a bottom film quickly, and can meet the rapid production demand of the condensation bead packaging machine.

[0045] Reference is made to the accompanying drawings Figure 1 , the accompanying drawings Figure 2 , the accompanying drawings Figure 3In one of the embodiments, the vacuum valve block air path structure comprises a rack 100, a vacuum block 200, a mold 300, a friction plate 400 and an energy storage piece 600. The vacuum block 200 is fixed on the rack 100, and the vacuum block 200 is provided with a vacuum cavity 210 and a vacuum port 220 which are in communication with each other, and the vacuum port 220 is used to connect a vacuum source; the mold 300 is movably arranged on the rack 100, and the mold 300 is provided with a forming cavity 310 on the side away from the vacuum block 200; the friction plate 400 is arranged on the side of the mold 300 facing the vacuum block 200, and the friction plate 400 is provided with an air hole 410, the air hole 410 can be communicated with the vacuum cavity 210 when the mold 300 moves, and the air hole 410 is communicated with the forming cavity 310 through an air pipe 500; the energy storage piece 600 is arranged between the friction plate 400 and the mold 300, and the energy storage piece 600 can accumulate the downward pressure, and when the friction plate 400 moves to abut against the vacuum block 200, the energy storage piece 600 can also release the downward pressure to push the friction plate 400 to abut against the vacuum block 200.

[0046] Specifically, the mold 300 comprises a forming seat 320 and a base 330, the base 330 is provided with a connecting hole 331 and a converging cavity 332 which are in communication with each other, the connecting hole 331 is used to connect the air pipe 500, the forming seat 320 is arranged above the opening of the converging cavity 332, the number of the forming cavities 310 is multiple, and the multiple forming cavities 310 are arranged on the side of the forming seat 320 away from the base 330, and the bottom surface of each forming cavity 310 is provided with multiple air holes 311 which are communicated with the converging cavity 332. Among them, the air hole 410 is provided with a first pipe opening 510, the connecting hole 331 is provided with a second pipe opening 520, and the opposite ends of the air pipe 500 are connected with the first pipe opening 510 and the second pipe opening 520 respectively.

[0047] It is worth noting that the abutment sealing between the friction plate 400 and the vacuum block 200 is not completely sealed. Since the vacuum cavity 210 is continuously evacuated, even if there is air leakage between the friction plate 400 and the vacuum block 200 during the movement of the friction plate 400, the vacuum cavity 210 can continuously supplement the vacuum degree of the air hole 410, so that the vacuum degree in the forming cavity 310 can meet the requirements of the bottom film forming, avoiding the problem that the air leakage of the one-way valve in the prior art cannot supplement the vacuum degree, thereby affecting the vacuum forming of the bottom film.

[0048] The rack 100 can be a ring-shaped rack, and the ring-shaped rack is provided with a ring-shaped chain 110, and the mold 300 is arranged on the ring-shaped chain 110, and the movement of the ring-shaped chain 110 can drive the mold 300 to move circularly on the rack 100.

[0049] From the above, the vacuum valve block gas path structure provided by the application can ensure reliable sealing between the vacuum cavity 210 and the air hole 410, even when the mold 300 moves, and can maintain a stable vacuum state.

[0050] Compared with the intermittent vacuum pumping mode in the prior art that relies on the automatic closing of the one-way valve to close the vacuum gas path, the vacuum valve block gas path structure of the application realizes continuous vacuum pumping. This continuous vacuum pumping mode not only ensures the stability and reliability of the vacuum degree, but also effectively avoids the air leakage phenomenon caused by the poor closing of the one-way valve, thereby significantly improving the effect of the bottom film vacuum forming.

[0051] In addition, by removing the restriction of the one-way valve, the effective diameter of the vacuum gas path is also increased, thereby improving the efficiency of vacuum adsorption and meeting the production needs of high-speed bead packaging machines. For example, when the diameter of the vacuum gas path is 6mm, after removing the one-way valve of type AKH08B-02S, the effective diameter is increased from 4.2mm to 6mm, which can meet the continuous vacuum pumping requirement of a mold translation speed of 200mm / s.

[0052] Reference is made to the accompanying drawings Figure 4 , the accompanying drawings Figure 5 In one embodiment, the number of vacuum blocks 200 is multiple, and the multiple vacuum blocks 200 are arranged on the rack 100 in a splicing manner.

[0053] With the above technical solution, the long vacuum pumping area formed by splicing multiple vacuum blocks 200 can ensure uniform distribution of the vacuum degree in the entire vacuum pumping area. Compared with a single vacuum block 200, this design can better maintain a stable vacuum state and avoid forming defects caused by insufficient local vacuum degree.

[0054] In one embodiment, the multiple vacuum blocks 200 are spliced to form a first vacuum block array 230 and a second vacuum block array 240 arranged side by side, the first vacuum block array 230 and the second vacuum block array 240 each include at least two vacuum blocks 200 connected end to end, and the air hole 410 includes a first air hole 411 and a second air hole 412 arranged side by side, the first air hole 411 is used to communicate with the vacuum cavity 210 of the first vacuum block array 230, and the second air hole 412 is used to communicate with the vacuum cavity 210 of the second vacuum block array 240.

[0055] By setting the first vacuum block array 230 and the second vacuum block array 240 and respectively corresponding to the first air hole 411 and the second air hole 412, independent vacuum control of different areas can be realized. This design allows flexible vacuum switching at different production stages or different mold 300 positions, thereby meeting the needs of complex molding processes.

[0056] In one embodiment, the tail of the vacuum cavity 210 on the first vacuum block array 230 and the head of the vacuum cavity 210 on the second vacuum block array 240 are arranged in a head-to-tail manner in the vertical projection plane. When the first air hole 411 moves to the tail of the vacuum cavity 210 of the first vacuum block array 230, the second air hole 412 can be connected to the head of the vacuum cavity 210 of the second vacuum block array 240.

[0057] With the above technical solution, when the first air hole 411 of the friction plate 400 moves to the position of the vacuum cavity 210 of the first vacuum block array 230, the mold 300 starts to vacuum. At this time, the second air hole 412 of the friction plate 400 is blocked by the upper surface of the second vacuum block array 240 and is in a closed state. With the continuous translation of the friction plate 400, the first air hole 411 moves away from the vacuum cavity 210 of the first vacuum block array 230, and the second air hole 412 is connected to the vacuum cavity 210 of the second vacuum block array 240, and vacuum starts. This design realizes continuous vacuuming, ensuring the continuity and stability of vacuum adsorption, and is particularly suitable for production scenarios that require long-distance continuous vacuuming.

[0058] In one embodiment, the tail of the vacuum cavity 210 on the first vacuum block array 230 and the head of the vacuum cavity 210 on the second vacuum block array 240 are arranged in a head-to-tail manner in the vertical projection plane. When the first air hole 411 moves to the tail of the vacuum cavity 210 of the first vacuum block array 230, the second air hole 412 can be connected to the head of the vacuum cavity 210 of the second vacuum block array 240.

[0059] It is worth noting that two molding seats 320 can be correspondingly arranged on one base 330. In this embodiment, two first air holes 411 and two second air holes 412 are arranged on the base 330 to perform vacuuming on the molding cavities 310 of the two molding seats 320.

[0060] With the above technical solution, by designing a head-to-tail disconnection mode of the two vacuum block arrays, two independent vacuum sources can be used to connect the two vacuum block arrays, thereby meeting different vacuum degree requirements.

[0061] Reference is made to the accompanying drawings Figure 5In one embodiment, linear bearings 910 are arranged on the mold 300, and guide rails 920 are arranged on the friction plate 400, and the guide rails 920 are arranged in the linear bearings 910 in a liftable manner.

[0062] Specifically, the number of linear bearings 910 and guide rails 920 can be four, and the four linear bearings 910 and guide rails 920 are arranged in a rectangular shape between the friction plate 400 and the mold 300.

[0063] By using the above technical solution, the combination of the linear bearings 910 and the guide rails 920 can ensure that the friction plate 400 moves smoothly along a straight line during lifting, reducing deviation and jitter during movement. This design significantly improves the lifting accuracy of the friction plate 400, ensuring that it can accurately abut and seal with the vacuum block 200.

[0064] In one embodiment, the energy storage member 600 is a resilient glue, and the opposite ends of the resilient glue abut the friction plate 400 and the mold 300, respectively.

[0065] It is worth noting that the energy storage member 600 can also be a spring or other elastic member suitable for use between the friction plate 400 and the mold 300; or the energy storage member 600 can also be a magnetic member, for example, a first magnetic member is arranged on the friction plate 400, and a second magnetic member is arranged on the mold 300, and when the first magnetic member and the second magnetic member approach each other, a downward pressure is generated on the friction plate 400.

[0066] By using the above technical solution, due to the durability and fatigue resistance of the resilient glue, the replacement frequency of the energy storage member 600 is reduced, and the maintenance cost is reduced.

[0067] Reference is made to the accompanying drawings Figure 6 , the accompanying drawings Figure 7 In one embodiment, a plurality of vacuum blocks 200 are arranged in a single row in a head-to-tail manner, and the spacing distance between two adjacent vacuum cavities 210 is less than the extension length of the air hole 410. When the air hole 410 moves to the tail of one of the vacuum cavities 210, the head of the adjacent vacuum cavity 210 is in communication with the air hole 410 (as shown in area B of FIG. 6B). Figure 7

[0068] By using the above technical solution, when the spacing distance between two adjacent vacuum cavities 210 is less than the extension length of the air hole 410, the air hole 410 can seamlessly switch from one vacuum cavity 210 to another vacuum cavity 210 during movement, thereby ensuring the continuity of vacuum adsorption. Continuous vacuum pumping is achieved through a single row of vacuum blocks 200, significantly improving production efficiency, and is particularly suitable for high-speed production environments.

[0069] ​In one of the embodiments, the interval distance between two adjacent vacuum cavities 210 is greater than the extension length of the air vent hole 410 (as shown in the A area in the attached Figure 7

[0070] With the above technical solution, when the interval distance between two adjacent vacuum cavities 210 is greater than the extension length of the air vent hole 410, the air vent hole 410 will be temporarily disconnected from the vacuum cavity 210 during movement, thereby allowing two independent vacuum sources to be connected to two different vacuum cavities 210, respectively, to achieve switching between two different vacuum degrees and meet the requirements of complex production processes.

[0071] In one of the embodiments, a roller 700 is rotatably arranged at the front end of the vacuum block 200, and the roller 700 protrudes from the upper surface of the vacuum block 200. The roller 700 can abut against the friction plate 400 to push the friction plate 400 upwards and make the energy storage member 600 accumulate downward pressure.

[0072] Specifically, the front end of the vacuum block 200 refers to the end of the vacuum block 200 for receiving the input of the friction plate 400, i.e., the end of the friction plate 400 about to enter above the vacuum block 200.

[0073] With the above technical solution, the roller 700 is rotatably arranged at the front end of the vacuum block 200 and protrudes from the upper surface of the vacuum block 200. When the friction plate 400 moves to the position of the roller 700, the roller 700 can abut against the friction plate 400 to push the friction plate 400 to smoothly press above the vacuum block 200, thereby achieving the automatic lifting function of the friction plate 400 without the need for additional power devices, and simplifying the system structure.

[0074] Referring to the attached Figure 8 In one of the embodiments, a sealing rubber strip 800 is further included, one end surface of the friction plate 400 is provided with a mounting groove 420, the sealing rubber strip 800 is arranged in the mounting groove 420, and the number of the molds 300 is multiple. The multiple molds 300 can be moved to be arranged side by side above the vacuum cavities 210, and the sealing rubber strip 800 can seal the gap between the two adjacent molds 300 arranged side by side.

[0075] With the above technical solution, the sealing rubber strip 800 is arranged in the mounting groove 420 of one end surface of the friction plate 400, which can effectively seal the gap between the adjacent molds 300, thereby improving the sealing performance between the molds 300 and reducing the risk of vacuum leakage.

[0076] The working process of the vacuum valve block air path structure can be referred to as follows: The vacuum port 220 of the vacuum block 200 is in communication with the vacuum source, so that the vacuum cavity 210 of the vacuum block 200 forms a vacuum. ​

[0077] The friction plate 400 is pressed against the upper surface of the vacuum block 200 by the pressing force of the energy storage member 600, and the friction plate 400 translates on the upper surface of the vacuum block 200 as the mold 300 moves.

[0078] When the air hole 410 of the friction plate 400 moves to the position of the vacuum cavity 210 of the vacuum block 200, the air hole 410 performs vacuum suction on the molding cavity 310 of the mold 300 through the air pipe 500. Since the vacuum cavity 210 is in the shape of a long groove, the air hole 410 is in communication with the vacuum cavity 210 during the movement of the friction plate 400 on the upper surface of the vacuum block 200, and the mold 300 is continuously vacuumed in this process.

[0079] When two vacuum sources are required, and different vacuum degrees are required, the vacuum cavities 210 of two vacuum blocks 200 are separated by a certain distance (which can be achieved by arranging the vacuum blocks 200 in a single row or arranging the vacuum blocks 200 in a double row), so that the two vacuum sources are not communicated.

[0080] The application also provides a condensation bead packaging machine comprising the vacuum valve block air path structure of any one of the above embodiments.

[0081] In the description of the present specification, the description of the terms "one embodiment", "certain embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0082] The above only describes some embodiments of the present application. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of protection of the present application.

Claims

1. A vacuum valve block gas path structure, characterized in that: include: rack(100); A vacuum block (200) is fixedly mounted on the frame (100), wherein the vacuum block (200) is provided with a vacuum cavity (210) and a vacuum port (220) that are interconnected, and the vacuum port (220) is used to connect to a vacuum source; A mold (300) is movably disposed on the frame (100), and a molding cavity (310) is provided on a side of the mold (300) facing away from the vacuum block (200); a friction plate (400) which is movable and arranged on a side of the mold (300) facing the vacuum block (200); a vent hole (410) is provided on the friction plate (400); the vent hole (410) can move with the mold (300) to communicate with the vacuum chamber (210); and the vent hole (410) is communicated with the molding chamber (310) via an air pipe (500); An energy storage member (600) is provided between the friction plate (400) and the mold (300). The energy storage member (600) is capable of accumulating downward pressure. When the friction plate (400) moves to abut against the vacuum block (200), the energy storage member (600) is capable of releasing the downward pressure to push the friction plate (400) and the vacuum block (200) to abut and seal.

2. The vacuum valve block gas path structure according to claim 1, characterized in that: There are a plurality of vacuum blocks (200), and the plurality of vacuum blocks (200) are spliced ​​together and arranged on the frame (100).

3. The vacuum valve block gas path structure according to claim 2, characterized in that: A plurality of the vacuum blocks (200) are spliced ​​to form a first vacuum block array (230) and a second vacuum block array (240) arranged side by side. The first vacuum block array (230) and the second vacuum block array (240) each include at least two vacuum blocks (200) connected end to end. The vents (410) include a first vent (411) and a second vent (412) arranged side by side. The first vent (411) is used to communicate with the vacuum cavity (210) of the first vacuum block array (230), and the second vent (412) is used to communicate with the vacuum cavity (210) of the second vacuum block array (240).

4. The vacuum valve block gas path structure according to claim 3, characterized in that: The tail of the vacuum cavity (210) on the first vacuum block array (230) and the head of the vacuum cavity (210) on the second vacuum block array (240) are arranged end to end on a vertical projection plane; when the first vent hole (411) moves to the tail of the vacuum cavity (210) of the first vacuum block array (230), the second vent hole (412) can be connected to the head of the vacuum cavity (210) of the second vacuum block array (240).

5. The vacuum valve block gas path structure according to claim 3, characterized in that: The tail of the vacuum cavity (210) on the first vacuum block array (230) and the head of the vacuum cavity (210) on the second vacuum block array (240) are arranged to be disconnected end to end on a vertical projection plane; when the first vent hole (411) moves to the tail of the vacuum cavity (210) of the first vacuum block array (230), the upper surface of the vacuum block (200) of the second vacuum block array (240) can close the second vent hole (412).

6. The vacuum valve block gas path structure according to claim 2, characterized in that: The plurality of vacuum blocks (200) are arranged end to end in a single row, the spacing between two adjacent vacuum chambers (210) is smaller than the extension length of the vent hole (410), and when the vent hole (410) moves to the tail of one of the vacuum chambers (210), the head of the adjacent vacuum chamber (210) is connected to the vent hole (410).

7. The vacuum valve block gas path structure according to claim 2, characterized in that: The plurality of vacuum blocks (200) are arranged end to end in a single row, and the spacing between two adjacent vacuum chambers (210) is greater than the extension length of the vent hole (410).

8. The vacuum valve block gas path structure according to claim 1, characterized in that: The invention also includes a roller (700), which is rotatably arranged at the front end of the vacuum block (200) and protrudes from the upper surface of the vacuum block (200). The roller (700) can abut against the friction plate (400) to push the friction plate (400) upward and enable the energy storage member (600) to accumulate downward pressure.

9. The vacuum valve block gas path structure according to claim 1, characterized in that: The invention also includes a sealing strip (800), one end surface of the friction plate (400) is provided with a mounting groove (420), and the sealing strip (800) is arranged in the mounting groove (420). The number of the molds (300) is multiple, and the multiple molds (300) can be moved to be arranged side by side above the vacuum chamber (210), and the sealing strip (800) can seal the gap between two adjacent molds (300) arranged side by side.

10. The vacuum valve block gas path structure according to claim 1, characterized in that: It also includes a linear bearing (910) and a guide rail (920), wherein the linear bearing (910) is provided on the mold (300), and the guide rail (920) is provided on the friction plate (400), and the guide rail (920) can be lifted and lowered in the linear bearing (910).

11. The vacuum valve block gas path structure according to claim 1, characterized in that: The energy storage member (600) is an elastic rubber, and opposite ends of the elastic rubber are respectively in contact with the friction plate (400) and the mold (300).

12. A condensed bead packaging machine, characterized in that: The vacuum valve block gas path structure comprises the vacuum valve block gas path structure according to any one of claims 1 to 9.

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