Vacuum valve block gas path structure and condensation bead packaging machine

Abstract

The application discloses a vacuum valve block gas path structure and a condensation bead packaging machine, and belongs to the technical field of packaging machines. The vacuum block is fixed on the rack, and the vacuum block is provided with a vacuum cavity and a vacuum port. The vacuum port is used for connecting a vacuum source. The mold is movably arranged on the rack, and the side of the mold away from the vacuum block is provided with a forming cavity. The friction plate is arranged on the side of the mold facing the vacuum block and is capable of ascending and descending. The friction plate is provided with a ventilation hole. The ventilation hole can be communicated with the vacuum cavity when the mold moves, and the ventilation hole is communicated with the forming cavity through an air pipe. The energy storage part is arranged between the friction plate and the mold. The energy storage part can accumulate the downward pressure. When the energy storage part moves to abut against the vacuum block, the energy storage part can also release the downward pressure to push the friction plate to abut against and seal the vacuum block. The application continuously performs vacuumizing on the moving mold, thereby avoiding the closing of the vacuum gas path depending on the one-way valve, effectively solving the air leakage problem of the one-way valve, and meeting the rapid production requirement of the condensation bead packaging machine.

Description

Technical Field

[0001] This invention relates to the field of packaging machine technology, and in particular to a vacuum valve block air path structure and a granulation packaging machine. Background Technology

[0002] In the production process of pod packaging machines, the formation of pods mainly relies on the vacuum forming of the base film. Specifically, this process includes the following key steps: First, the base film is placed on the upper surface of the mold; then, a vacuum operation is performed through the mold cavity to draw the base film into the cavity, ensuring that the base film completely adheres to the cavity, thus completing the vacuum forming of the base film. Afterward, the filler is filled into the mold cavity, and then the outer film is sealed onto the base film, so that the base film and outer film together encapsulate the filler. Finally, the pods are formed through a cutting process. The vacuum forming process of the base film is particularly crucial in the entire production process.

[0003] Existing technologies (such as CN108528839A, a circulating vacuum structure and packaging machine) do not employ continuous vacuuming in their vacuum circuit structures. During the bottom film vacuum forming process, a one-way valve automatically closes the vacuum circuit when vacuuming is not in progress. Under high-speed operating conditions, the one-way valve is prone to wear due to frequent opening and closing, leading to incomplete closure of the vacuum circuit and air leakage, which in turn affects the vacuum forming effect of the bottom film. Furthermore, because a one-way valve needs to be installed within the vacuum circuit, the diameter of the vacuum circuit is limited by the one-way valve. For example, when the diameter of the vacuum circuit is 6mm, after installing a one-way valve of model AKH08B-02S, the diameter of the one-way valve is only 4.2mm, and the diameter of the vacuum circuit also decreases accordingly. When the translational speed of the granule packaging machine exceeds 80mm / s, the bottom film is difficult to adhere to the bottom of the mold cavity, thus preventing complete vacuum forming of the bottom film. Summary of the Invention

[0004] The purpose of this invention is to provide a vacuum valve block air path structure and a granulation packaging machine. By continuously evacuating the moving mold, the reliance on a one-way valve to close the vacuum air path is avoided, thereby effectively solving the problem of one-way valve leakage and meeting the rapid production needs of the granulation packaging machine.

[0005] In a first aspect, the present invention provides a vacuum valve block gas path structure, comprising:

[0006] frame;

[0007] A vacuum block is fixedly mounted on the frame. The vacuum block has a vacuum cavity and a vacuum port that are interconnected. The vacuum port is used to connect to a vacuum source.

[0008] The mold is movably mounted on the frame, and a forming cavity is provided on the side of the mold facing away from the vacuum block;

[0009] A friction plate is arranged on the side of the mold facing the vacuum block and is capable of lifting and lowering, and the friction plate is provided with a ventilation hole, which is capable of communicating with the vacuum cavity when the mold moves to the position of communicating with the vacuum cavity, and the ventilation hole communicates with the forming cavity through an air pipe.

[0010] An energy storage member is arranged between the friction plate and the mold, and the energy storage member is capable of accumulating downward pressure, and when the friction plate moves to abut against the vacuum block, the energy storage member is also capable of releasing the downward pressure to push the friction plate to abut against the vacuum block to seal.

[0011] The vacuum valve block air path structure provided by the application can ensure reliable sealing between the vacuum cavity and the ventilation hole, and can maintain a stable vacuum state even when the mold moves.

[0012] Compared with the intermittent vacuum pumping mode in the prior art which relies on the automatic closing of the one-way valve to close the vacuum air path, the vacuum valve block air 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 caused by the poor closing of the one-way valve, thereby significantly improving the effect of vacuum forming of the bottom film.

[0013] In addition, by removing the restriction of the one-way valve, the effective diameter of the vacuum air path is also increased, thereby improving the efficiency of vacuum adsorption and meeting the production requirements of high-speed bead packaging machines. For example, when the diameter of the vacuum air 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.

[0014] Further, a plurality of vacuum blocks are arranged on the rack in a spliced manner.

[0015] By using the above technical scheme, the long vacuum pumping area formed by splicing a plurality of vacuum blocks can ensure uniform distribution of the vacuum degree in the entire vacuum pumping area. Compared with a single vacuum block, this design can better maintain a stable vacuum state and avoid forming defects caused by insufficient local vacuum degree.

[0016] Further, the plurality of vacuum blocks are spliced to form a first vacuum block array and a second vacuum block array arranged side by side, the first vacuum block array and the second vacuum block array each include at least two vacuum blocks connected end to end, the ventilation hole includes a first ventilation hole and a second ventilation hole arranged side by side, the first ventilation hole is used to communicate with the vacuum cavity of the first vacuum block array, and the second ventilation hole is used to communicate with the vacuum cavity of the second vacuum block array.

[0017] By setting the first vacuum block array and the second vacuum block array and corresponding to the first vent hole and the second vent hole, independent vacuum control of different areas can be achieved. This design allows flexible vacuum switching at different production stages or different mold positions, thereby meeting the complex molding process requirements.

[0018] 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 vent hole moves to the tail of the vacuum cavity of the first vacuum block array, the second vent hole can be in communication with the head of the vacuum cavity of the second vacuum block array.

[0019] With the above technical solution, when the first vent 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 vent 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 vent hole moves away from the vacuum cavity of the first vacuum block array, and the second vent hole is in communication with the vacuum cavity of the second vacuum block array, and vacuum starts. 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.

[0020] 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 vent hole moves to the tail of the vacuum cavity of the first vacuum block array, the upper surface of the vacuum block of the second vacuum block array can close the second vent hole.

[0021] With the above technical solution, by designing the two vacuum block arrays in a head-tail disconnected mode, two independent vacuum sources can be used to connect the two vacuum block arrays, thereby meeting different vacuum degree requirements.

[0022] Further, a plurality of vacuum blocks are arranged in a single row in series, and the spacing distance between two adjacent vacuum cavities is less than the extension length of the vent hole. When the vent hole moves to the tail of one of the vacuum cavities, the head of the adjacent vacuum cavity is connected to the vent hole.

[0023] With the above technical solution, when the spacing distance between two adjacent vacuum cavities is less than the extension length of the vent hole, the vent hole can seamlessly switch from one vacuum cavity to another during movement, thereby ensuring the continuity of vacuum adsorption. Continuous vacuuming is achieved through a single row of vacuum blocks, significantly improving production efficiency, and is particularly suitable for high-speed production environments.

[0024] Further, the interval distance between two adjacent vacuum cavities is greater than the extension length of the air hole.

[0025] With the above technical solution, when the interval distance between two adjacent vacuum cavities is greater than the extension length of the air hole, the air hole is temporarily disconnected from the vacuum cavity during movement, allowing two independent vacuum sources to be connected to two different vacuum cavities, enabling switching between two different vacuum levels to meet complex production process requirements.

[0026] Further, it further comprises a roller rotatably arranged at the front end of the vacuum block, and the roller 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.

[0027] With the above technical solution, the roller is rotatably arranged 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 roller position, the roller can abut against the friction plate, thereby pushing the friction plate to smoothly press above the vacuum block, achieving the automatic lifting function of the friction plate without the need for additional power devices, simplifying the system structure.

[0028] Further, it further comprises a sealing rubber strip, one end surface of the friction plate is provided with a mounting groove, and the sealing rubber strip is arranged in the mounting groove, the number of the molds is multiple, and multiple molds can be arranged side by side above the vacuum cavity, and the sealing rubber strip can seal the gap between two adjacent molds arranged side by side.

[0029] With the above technical solution, the sealing rubber strip is installed in the mounting groove of 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.

[0030] Further, it further comprises a linear bearing and a guide rail, 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.

[0031] With the above technical solution, the combination of the linear bearing and the guide rail can ensure smooth linear motion of the friction plate during lifting, reducing deviation and shaking during movement. This design significantly improves the lifting accuracy of the friction plate, ensuring accurate abutment sealing with the vacuum block.

[0032] 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.

[0033] With the above technical solution, due to the durability and fatigue resistance of the resilient rubber, the replacement frequency of the energy storage member is reduced, and the maintenance cost is reduced.

[0034] In a second aspect, the application provides a condensation bead packaging machine comprising the vacuum valve block gas path structure of any one of the above.

[0035] 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 vent, and can maintain a stable vacuum state even when the mold is moving.

[0036] Compared with the intermittent vacuum pumping mode in the prior art which relies on the automatic closing of the one-way valve to seal 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 caused by the poor closing of the one-way valve, thereby significantly improving the effect of vacuum forming of the bottom film.

[0037] 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.

[0038] 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

[0039] Figure 1 An assembly structure diagram of a vacuum valve block gas path structure according to the application.

[0040] Figure 2 A cross-sectional structure diagram of a vacuum valve block gas path structure according to the application.

[0041] Figure 3 A structure top view of a vacuum valve block gas path structure according to the application.

[0042] Figure 4 An assembly structure diagram of a friction plate and a mold according to the application. Figure 2 A structure diagram of a vacuum block according to the application.

[0043] Figure 5 An assembly structure diagram of a friction plate and a mold according to the application. Figure 2

[0044] ​Figure 6 As Figure 2 Structure diagram of another embodiment of the vacuum block.

[0045] Figure 7 As Figure 6 Structure diagram of the cross section of the vacuum block after abutting against the friction plate.

[0046] Figure 8 As Figure 4 Structure diagram of the cross section of the vacuum block after abutting against the friction plate.

[0047] In the drawings: 100, frame; 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

[0048] 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.

[0049] 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 specific examples in the following description are not described in complete detail. It is to be understood that the description is related to and illustrates an example of the embodiments and is made by way of example only, not by way of limitation. Furthermore, the present application can refer to a number of elements in different embodiments by the same reference designations, which are not intended to limit the present application to a particular embodiment. In addition, the described embodiments are to be considered in a descriptive sense only and not for purposes of limitation.

[0050] 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, and can quickly form a bottom film, thereby meeting the rapid production requirements of the condensation bead packaging machine.

[0051] Reference is made to the accompanying drawings that form a part of this disclosure 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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 in series on the rack 100.

[0059] With the above technical solution, the long vacuum pumping area formed by the series connection of 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.

[0060] In one embodiment, the multiple vacuum blocks 200 are arranged in series to form a first vacuum block array 230 and a second vacuum block array 240, the first vacuum block array 230 and the second vacuum block array 240 each include at least two vacuum blocks 200 connected in series, and the air hole 410 includes a first air hole 411 and a second air hole 412 arranged in parallel, 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] With the above technical solution, by designing the 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.

[0067] Reference is made to the accompanying drawings Figure 5In one embodiment, it also includes a linear bearing 910 and a guide rail 920. The linear bearing 910 is disposed on the mold 300, and the guide rail 920 is disposed on the friction plate 400. The guide rail 920 is vertically movable within the linear bearing 910.

[0068] Specifically, there can be four linear bearings 910 and four guide rails 920, arranged in a rectangular pattern between the friction plate 400 and the mold 300.

[0069] By employing the above technical solution, the combination of linear bearing 910 and guide rail 920 ensures that the friction plate 400 moves smoothly along a straight line during lifting and lowering, reducing offset and vibration during movement. This design significantly improves the lifting accuracy of the friction plate 400, ensuring that it can accurately contact and seal with the vacuum block 200.

[0070] In one embodiment, the energy storage component 600 is an elastic rubber, with its opposite ends abutting against the friction plate 400 and the mold 300, respectively.

[0071] It is worth noting that the energy storage component 600 can also be an elastic component such as a spring that can be applied between the friction plate 400 and the mold 300; or, the energy storage component 600 can also be a magnetic component. For example, a first magnetic component is provided on the friction plate 400 and a second magnetic component is provided on the mold 300. When the first magnetic component and the second magnetic component approach each other, they can generate downward pressure on the friction plate 400.

[0072] By adopting the above technical solution, the replacement frequency of the energy storage component 600 is reduced due to the durability and fatigue resistance of the elastic rubber, thus lowering maintenance costs.

[0073] Reference Appendix Figure 6 Appendix Figure 7 In one embodiment, multiple vacuum blocks 200 are arranged in a single row, end to end. The distance between two adjacent vacuum chambers 210 is less than the extension length of the vent 410. When the vent 410 moves to the tail of one of the vacuum chambers 210, the head of the adjacent vacuum chamber 210 connects with the vent 410 (as shown in the attached figure). Figure 7 (As shown in region B).

[0074] By adopting the above technical solution, when the distance between two adjacent vacuum chambers 210 is less than the extension length of the vent 410, the vent 410 can seamlessly switch from one vacuum chamber 210 to another during the movement, thereby ensuring the continuity of vacuum adsorption. Continuous vacuuming is achieved through a single row of vacuum blocks 200, which significantly improves production efficiency and is particularly suitable for high-speed production environments.

[0075] 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

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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, and the sealing rubber 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 cavities 210. The sealing rubber strip 800 can seal the gap between the two adjacent molds 300 arranged side by side.

[0081] With the above technical solution, the sealing rubber strip 800 is installed 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.

[0082] The working process of the vacuum valve block air path structure can be referred to as follows:

[0083] 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.​

[0084] The friction plate 400 is pressed on the upper surface of the vacuum block 200 by the pressing force of the energy storage member 600, and the friction plate 400 is translated on the upper surface of the vacuum block 200 as the mold 300 moves.

[0085] 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.

[0086] 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 (the vacuum blocks 200 can be arranged in a single row or double rows), so that the two vacuum sources are not communicated.

[0087] The application also provides a condensation bead packaging machine comprising the vacuum valve block air path structure of any one of the above embodiments.

[0088] In the description of the present specification, the description of the terms "one embodiment", "certain embodiments", "illustrative embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiments or examples are included in at least one embodiment or example of the present application. In the present specification, the illustrative 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.

[0089] 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 by, The utility model relates to a vacuum forming machine, including: A rack (100); A vacuum block (200) is fixedly arranged on the rack (100), the vacuum block (200) is equipped with the vacuum cavity (210) and the vacuum port (220) of intercommunication, the vacuum port (220) is used for connecting the vacuum source; A mould (300) is movably arranged on the rack (100), and the side of the mould (300) away from the vacuum block (200) is equipped with a forming cavity (310); A friction plate (400) is arranged on the side of the mould (300) towards the vacuum block (200) and can be lifted and lowered, the friction plate (400) is equipped with a ventilation hole (410), the ventilation hole (410) can be communicated with the vacuum cavity (210) when the mould (300) moves, and the ventilation hole (410) is communicated with the forming cavity (310) through an air pipe (500); An energy storage piece (600) is arranged between the friction plate (400) and the mould (300), the energy storage piece (600) can accumulate the pressure, when the friction plate (400) moves to abut the vacuum block (200), the energy storage piece (600) can also release the pressure and push the friction plate (400) to abut the vacuum block (200) and seal.

2. The vacuum valve block gas path structure according to claim 1, characterized by, The number of the vacuum block (200) is multiple, and the multiple vacuum blocks (200) are arranged on the rack (100) and are connected with each other.

3. The vacuum valve block gas path structure according to claim 2, characterized by, The multiple vacuum blocks (200) are connected 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 in a head-to-tail manner, the ventilation hole (410) includes a first ventilation hole (411) and a second ventilation hole (412) arranged side by side, the first ventilation hole (411) is used for being communicated with the vacuum cavity (210) of the first vacuum block array (230), and the second ventilation hole (412) is used for being communicated 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 by, 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 a vertical projection plane, when the first ventilation hole (411) moves to the tail of the vacuum cavity (210) of the first vacuum block array (230), the second ventilation hole (412) can be communicated with 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 by, 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 a vertical projection plane, when the first ventilation hole (411) moves to the tail of the vacuum cavity (210) of the first vacuum block array (230), the second ventilation hole (412) can be communicated with the head of the vacuum cavity (210) of the second vacuum block array (240).

6. The vacuum valve block gas path structure according to claim 2, characterized by, A plurality of the vacuum blocks (200) are arranged in a single row end to end, the interval 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 connected with the air hole (410).

7. The vacuum valve block gas path structure according to claim 2, characterized by, A plurality of the vacuum blocks (200) are arranged in a single row end to end, the interval distance between two adjacent vacuum cavities (210) is greater than the extension length of the air hole (410).

8. The vacuum valve block gas circuit structure according to claim 1, characterized in that, Further comprising a roller (700), the 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) to rise and make the energy storage member (600) accumulate downward pressure.

9. The vacuum valve block gas circuit structure according to claim 1, characterized in that, Further comprising a sealing rubber strip (800), 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), the number of the mold (300) is multiple, multiple mold (300) can be arranged side by side above the vacuum cavity (210), the sealing rubber strip (800) can seal the gap between two adjacent mold (300) arranged side by side.

10. The vacuum valve block gas circuit structure according to claim 1, characterized in that, Further comprising a linear bearing (910) and a guide rail (920), the linear bearing (910) is arranged on the mold (300), the guide rail (920) is arranged on the friction plate (400), the guide rail (920) is arranged in the linear bearing (910) in a lifting manner.

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

12. A bead-in-tube packaging machine characterized by, The vacuum valve block air path structure comprises the vacuum valve block air path structure according to any one of claims 1-9. The vacuum valve block air path structure comprises the vacuum valve block air path structure according to any one of claims 1-9.

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