Sealing cylinder assembly and blow molding equipment

Abstract

This utility model provides a sealing cylinder assembly and a blow molding equipment, relating to the field of blow molding equipment technology. The sealing cylinder assembly includes a sealing cylinder and a high-pressure valve group. The sealing cylinder includes a first end face and a receiving groove disposed on the first end face. The high-pressure valve group includes multiple valve cores and a valve cover structure. The valve cover structure includes at least one valve cover that is sealed to the sealing cylinder and covers the receiving groove. The valve cover can divide the receiving groove into at least one valve cavity, and each valve core is disposed in one valve cavity. This utility model can embed the valve cores of the high-pressure valve group into the valve cavities, making the shell of the sealing cylinder part of the shell of the high-pressure valve group, eliminating the need for an additional valve shell. Compared with the prior art, which manufactures and assembles the high-pressure valve group and the sealing cylinder separately, this reduces the number of parts and assembly complexity, lowers manufacturing and assembly costs, improves aesthetics, and helps to shorten the gas flow channel length and reduce gas loss.

Description

Technical Field

[0001] This utility model relates to the field of blow molding equipment technology, and in particular to a sealing cylinder assembly and blow molding equipment. Background Technology

[0002] In the field of plastic container manufacturing, blow molding and sealing cylinders are key pieces of equipment. Their main function is to introduce gaseous media (such as air) at different pressure levels into the heated plastic preform, causing it to expand and solidify into the desired plastic container within a mold. Currently, this type of equipment typically consists of two main parts: a high-pressure valve assembly and a sealing cylinder. The high-pressure valve assembly controls the gas pressure and flow direction, while the sealing cylinder performs the sealing and inflation actions on the preform. Due to technological specialization and production specialization, the high-pressure valve assembly and sealing cylinder are often manufactured independently by different companies, and ultimately assembled and debugged by equipment integrators. However, this method of separate manufacturing by different companies followed by unified assembly has brought about numerous problems. First, the sealing equipment suffers from a loosely structured layout and poor integration, resulting in a bulky size and significant space occupation. Second, the use of components from different suppliers with inconsistent interface standards makes it difficult to guarantee assembly precision, thus affecting operational stability. Third, the transmission of compressed gas through long flow channels leads to substantial energy loss, increasing gas consumption and reducing production efficiency. Furthermore, the overall manufacturing cost is high, and the lack of a unified and aesthetically pleasing design negatively impacts the equipment's market competitiveness. Therefore, improving the integration between the sealing cylinder and the high-pressure valve assembly to enhance assembly precision and overcome issues such as long gas paths and poor aesthetics has become a pressing technical challenge. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the present invention is to provide a sealing cylinder assembly and a blow molding equipment to solve at least one of the above-mentioned technical problems.

[0004] The above-mentioned objective of this utility model can be achieved by the following technical solution: this utility model provides a sealing cylinder assembly, comprising:

[0005] A sealing cylinder, the sealing cylinder including a first end face and a receiving groove disposed on the first end face;

[0006] A high-pressure valve assembly includes multiple valve cores and a valve cover structure. The valve cover structure includes at least one valve cover that is sealed to the sealing cylinder and covers the receiving groove. The valve cover can divide the receiving groove into at least one valve chamber, and each valve core is disposed in one of the valve chambers.

[0007] In a preferred embodiment of the present invention, the sealing cylinder assembly further includes a plurality of valve group air ports disposed on the sealing cylinder, each valve group air port being connected to a valve core.

[0008] In a preferred embodiment of the present invention, the sealing cylinder includes a second end face, and a plurality of valve group air ports are disposed on the second end face.

[0009] In a preferred embodiment of the present invention, the first end face and the second end face are disposed opposite to each other on both sides of the sealing cylinder.

[0010] In a preferred embodiment of the present invention, multiple valve covers are provided, and each valve cover divides the receiving groove into at least two valve chambers.

[0011] In a preferred embodiment of the present invention, a plurality of valve covers are arranged at intervals along the height direction; or, a plurality of valve covers are arranged at intervals along the horizontal direction.

[0012] In a preferred embodiment of the present invention, the sealing cylinder further includes a piston channel and a piston mechanism slidably disposed in the piston channel. The piston mechanism includes a piston rod and a sealing sleeve disposed at the bottom of the piston rod. The hollow inner cavity of the piston rod is used to deliver compressed gas and / or to allow the tension rod to pass through.

[0013] In a preferred embodiment of the present invention, the sealing cylinder assembly further includes a sealing cylinder air port disposed on the sealing cylinder. The sealing cylinder air port is disposed on the second end face and is used to supply air to the sealing cylinder to drive the piston rod to press down.

[0014] In a preferred embodiment of the present invention, the sealing cylinder assembly further includes a straight air passage disposed within the sealing cylinder, the straight air passage being used to connect the valve core and the piston rod.

[0015] In a preferred embodiment of the present invention, the sealing cylinder assembly further includes an electromagnetic pilot valve group, which includes a plurality of electromagnetic pilot valves disposed on the valve cover structure. Each electromagnetic pilot valve is connected to a corresponding valve core, and the electromagnetic pilot valve is used to drive the corresponding valve core to switch between on and off states.

[0016] In a preferred embodiment of the present invention, a plurality of the electromagnetic pilot valves are disposed on the same side of the valve cover structure, and the sealing cylinder assembly further includes a protective cover plate covering each of the electromagnetic pilot valves.

[0017] In a preferred embodiment of the present invention, the sealing cylinder assembly further includes a pilot air port disposed on the sealing cylinder, the pilot air port being used to connect to each of the electromagnetic pilot valves.

[0018] In a preferred embodiment of the present invention, the pilot air port is disposed on the second end face.

[0019] In a preferred embodiment of this utility model, three valve covers are provided, which can divide the receiving groove into six relatively independent valve chambers. The plurality of valve cores include a pre-blowing valve core, a middle-blowing valve core, a main-blowing valve core, a first recovery valve core, a second recovery valve core, and an exhaust valve core. The pre-blowing valve core cooperates with the corresponding valve chamber to form a pre-blowing valve, the middle-blowing valve core cooperates with the corresponding valve chamber to form a middle-blowing valve, the main-blowing valve core cooperates with the corresponding valve chamber to form a main-blowing valve, the first recovery valve core cooperates with the corresponding valve chamber to form a first recovery valve, the second recovery valve core cooperates with the corresponding valve chamber to form a second recovery valve, and the exhaust valve core cooperates with the corresponding valve chamber to form an exhaust valve core.

[0020] In a preferred embodiment of the present invention, the sealing cylinder assembly further includes a throttling valve disposed on the pre-blowing path of the pre-blowing valve.

[0021] In a preferred embodiment of the present invention, the sealing cylinder assembly further includes a positioning and mounting structure disposed on the sealing cylinder, the positioning and mounting structure including a plurality of mounting holes disposed on the sealing cylinder and at least one positioning hole disposed on the sealing cylinder.

[0022] In a preferred embodiment of the present invention, the plurality of mounting holes and the positioning holes are all disposed on the second end face.

[0023] This utility model also provides a blow molding device, including the aforementioned sealing cylinder assembly.

[0024] The technical solution of this utility model has the following significant beneficial effects:

[0025] The sealing cylinder assembly of this invention seals the sealing cylinder with a valve cover. The valve cover and the housing of the sealing cylinder cooperate to form a valve cavity, and the valve core of the high-pressure valve group can be embedded in the valve cavity. This makes the housing of the sealing cylinder a part of the housing of the high-pressure valve group, eliminating the need for a separate valve shell and achieving an integrated design of the sealing cylinder and the high-pressure valve group. Compared with the prior art where the high-pressure valve group and the sealing cylinder are manufactured and assembled separately, the sealing cylinder assembly of this invention reduces the number of parts and assembly complexity, improves assembly accuracy, lowers manufacturing and assembly costs, and enhances aesthetics because the high-pressure valve group and the sealing cylinder share a portion of the housing. Furthermore, integrating the high-pressure valve group into the sealing cylinder helps optimize the flow path of compressed gas, reduces energy loss during gas transmission, improves pneumatic efficiency, and thus reduces gas consumption during the bottle blowing process. The sealing cylinder assembly of this invention has the advantages of compact structure, high integration, good aesthetics, and high pneumatic efficiency. It is suitable for gas control and sealing operations in bottle blowing equipment and can better meet the requirements of modern intelligent manufacturing for efficient, aesthetically pleasing, energy-saving, and integrated equipment. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0028] Figure 1 This is a schematic diagram of the first end face structure of one embodiment of the sealing cylinder assembly of this utility model;

[0029] Figure 2 This is a schematic diagram of the second end face structure of one embodiment of the sealing cylinder assembly of this utility model;

[0030] Figure 3 This is a partial three-dimensional sectional view of one embodiment of the sealing cylinder assembly described in this utility model;

[0031] Figure 4 This is a side sectional view of one embodiment of the sealing cylinder assembly described in this utility model;

[0032] Figure 5 This is a top sectional view of one embodiment of the sealing cylinder assembly described in this utility model;

[0033] Figure 6 This is a three-dimensional structural diagram of one embodiment of the protective cover plate described in this utility model.

[0034] The reference numerals in the above figures are as follows:

[0035] 100. Sealing cylinder; 101. First end face; 102. Second end face; 103. Third end face; 104. Fourth end face; 110. Receiving groove; 120. Valve assembly air port; 130. Piston passage; 140. Piston mechanism; 141. Piston rod; 142. Sealing sleeve; 150. Sealing cylinder air port; 160. Straight air passage; 170. Pilot air port; 180. Mounting hole; 190. Positioning hole;

[0036] 200. High-pressure valve assembly; 210. Valve core; 211. Pre-blowing valve core; 212. Intermediate-blowing valve core; 213. Main-blowing valve core; 214. First recovery valve core; 215. Second recovery valve core; 216. Exhaust valve core; 220. Valve cover structure; 221. Valve cover;

[0037] 300. Electromagnetic pilot valve assembly; 310. Electromagnetic pilot valve; 320. Protective cover plate. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Implementation Method 1

[0040] Please refer to the following: Figures 1 to 6 As shown, an embodiment of the present invention provides a sealing cylinder assembly, which includes a sealing cylinder 100 and a high-pressure valve group 200. The sealing cylinder 100 includes a first end face 101 and a receiving groove 110 disposed on the first end face 101. The high-pressure valve group 200 includes a plurality of valve cores 210 and a valve cover structure 220. The valve cover structure 220 includes at least one valve cover 221 that is sealed to the sealing cylinder 100 and covers the receiving groove 110. The valve cover 221 can divide the receiving groove 110 into at least one relatively independent valve chamber, and each valve core 210 is disposed in one valve chamber.

[0041] Overall, the sealing cylinder assembly is sealed to the sealing cylinder 100 by connecting the valve cover 221 to the sealing cylinder 100. The valve cover 221 and the housing of the sealing cylinder 100 can cooperate to form a valve cavity. The valve core 210 of the high-pressure valve group 200 can be embedded in the valve cavity, so that the housing of the sealing cylinder 100 becomes part of the housing of the high-pressure valve group 200. There is no need to set up an additional valve shell, thereby realizing the integrated setting of the sealing cylinder 100 and the high-pressure valve group 200 and improving integration.

[0042] Compared with the prior art where the high-pressure valve assembly 200 and the sealing cylinder 100 are manufactured and assembled separately, the sealing cylinder assembly of the present invention reduces the number of parts and assembly complexity, improves assembly accuracy, reduces manufacturing and assembly costs, and enhances aesthetics because the high-pressure valve assembly 200 and the sealing cylinder 100 share a portion of the housing.

[0043] Furthermore, integrating the high-pressure valve assembly 200 into the sealing cylinder 100 helps optimize the flow path of compressed gas, reduces losses during gas transmission, improves pneumatic efficiency, and thus reduces gas consumption during the bottle blowing process.

[0044] The sealing cylinder assembly described in this utility model has the advantages of compact structure, high integration, good aesthetics, and high pneumatic efficiency. It is suitable for gas control and sealing operations in blow molding equipment and can better meet the requirements of modern intelligent manufacturing for equipment that is efficient, aesthetically pleasing, energy-saving, and integrated.

[0045] In the embodiments of this utility model, such as Figure 2 and Figure 3 In the embodiment shown, the sealing cylinder assembly also includes a plurality of valve group ports 120 disposed on the sealing cylinder 100, each valve group port 120 being connected to a valve core 210.

[0046] By connecting each valve group's air port 120 to a valve core 210, gas can directly and independently enter or exit the corresponding valve core 210, thereby realizing functions such as pre-blowing, intermediate blowing, main blowing, as well as recovery and exhaust.

[0047] The use of multiple valve groups and air ports 120 effectively improves the independence and accuracy of gas control, reduces mutual interference between gas paths, and optimizes the dynamic response performance of the sealing process.

[0048] Furthermore, the layout of the independent valve group air port 120 facilitates precise control of different blowing stages, improving blow molding efficiency and molding quality.

[0049] In the embodiments of this utility model, such as Figure 2 In the embodiment shown, the sealing cylinder 100 includes a second end face 102, and a plurality of valve group air ports 120 are disposed on the second end face 102.

[0050] By setting multiple valve group air ports 120 on the second end face 102, the layout of the valve group air ports 120 is more concentrated, which facilitates connection with the external air circuit system, improves the overall space utilization of the sealing cylinder 100, and reduces the assembly difficulty and maintenance cost.

[0051] In the embodiments of this utility model, such as Figure 2 In the embodiment shown, the first end face 101 and the second end face 102 are disposed opposite each other on both sides of the sealing cylinder 100.

[0052] By setting the first end face 101 and the second end face 102 opposite to each other on both sides of the sealing cylinder 100, the overall structural layout of the sealing cylinder 100 is more reasonable, which is conducive to realizing functional zoning.

[0053] Specifically, the first end face 101 can be used to install the high-pressure valve group 200, and the second end face 102 can be used to set the valve group air port 120 to connect to the external air circuit system, so that the high-pressure valve group 200 and the valve group air port 120 do not interfere with each other.

[0054] Furthermore, such as Figure 2 and Figure 3 In the illustrated embodiment, the sealing cylinder 100 also includes an internal channel connecting each valve core 210 with the corresponding valve group air port 120. By providing this internal channel within the sealing cylinder 100, external piping is eliminated, simplifying the piping layout, making the gas flow path more compact and efficient, reducing the risk of gas leakage, and improving sealing performance. Designers can adjust the specific configuration of the internal channel according to usage needs; no specific limitations are imposed here. The internal channel must avoid the piston channel 130.

[0055] In the embodiments of this utility model, such as Figure 2 In the embodiment shown, the sealing cylinder 100 also includes a third end face 103 and a fourth end face 104. The first end face 101, the second end face 102, the third end face 103 and the fourth end face 104 together form a sealing cylinder 100 body that is generally rectangular in shape.

[0056] Specifically, the first end face 101 is the front of the sealing cylinder 100, the second end face 102 is the back of the sealing cylinder 100, and the third end face 103 and the fourth end face 104 are the sides of the sealing cylinder 100.

[0057] By placing multiple valve group air ports 120 on the back of the sealing cylinder 100 and symmetrically arranging them with corresponding multiple valve cores 210, and utilizing the front and back of the sealing cylinder 100 to set up each functional structure, the width of the sealing cylinder 100 can be effectively reduced. Under the same conditions, the blow molding equipment can be equipped with more blowing stations, improving production efficiency. At the same time, it avoids the space constraints that occur when all air pipes are arranged on the same side.

[0058] In another feasible embodiment of this utility model, a receiving groove 110 may also be provided on the third end face 103 and / or the fourth end face 104. By providing a receiving groove 110 on the third end face 103 and / or the fourth end face 104, the valve core 210 can also be installed on the third end face 103 or the fourth end face 104, which facilitates flexible adjustment of the specific setting position of the valve core 210 according to the specific application scenario, and significantly improves the arrangement flexibility of the high-pressure valve group 200.

[0059] For example, in one feasible embodiment, multiple valve cores 210 of the high-pressure valve assembly 200 are all disposed on the third end face 103. In another feasible embodiment, multiple valve cores 210 of the high-pressure valve assembly 200 are all disposed on the fourth end face 104. In yet another feasible embodiment, some valve cores 210 are disposed on the third end face 103 and some valve cores 210 are disposed on the fourth end face 104. Of course, based on the above-described arrangement, some valve cores 210 may also be disposed on the first end face 101, without specific limitation.

[0060] In one feasible embodiment of this utility model, a valve cover 221 is provided, which divides the receiving groove 110 into at least two relatively independent valve chambers. By providing a valve cover 221, the overall structure is simplified, the complexity of manufacturing and assembly is reduced, and the number of parts is reduced, thereby lowering manufacturing costs.

[0061] In another feasible embodiment of this utility model, such as Figure 1 and Figure 3 In the embodiment shown, multiple valve covers 221 are provided, each valve cover 221 dividing the receiving groove 110 into at least two relatively independent valve chambers.

[0062] By setting multiple valve covers 221, each valve cover 221 divides the receiving groove 110 into at least two relatively independent valve chambers, realizing functional zoning and gas path isolation between valve chambers, avoiding mutual interference between valve chambers, and further improving the stability and response speed of the sealing process.

[0063] Designers can adjust the number of valve chambers divided by each valve cover 221 according to usage needs, without specific restrictions. For example, each valve cover 221 divides the receiving groove 110 into two relatively independent valve chambers; or, each valve cover 221 divides the receiving groove 110 into three relatively independent valve chambers; or, each valve cover 221 divides the receiving groove 110 into other numbers of relatively independent valve chambers.

[0064] In another feasible embodiment of the present invention, a plurality of valve covers 221 are arranged at intervals along the height direction; or, a plurality of valve covers 221 are arranged at intervals along the horizontal direction.

[0065] In one feasible embodiment, such as Figure 1 In the illustrated embodiment, a plurality of valve covers 221 are arranged at intervals along the height direction. In another feasible embodiment, a plurality of valve covers 221 are arranged at intervals along the horizontal direction.

[0066] The number of valve chambers matches the number of valve cores 210. For example, when there are six valve cores 210, three valve covers 221 can be provided, with each valve cover 221 forming two valve chambers. Alternatively, two valve covers 221 can be provided, with each valve cover 221 forming three valve chambers.

[0067] For example, in one specific embodiment, such as Figure 1 In the embodiment shown, when there are six valve cores 210 and three valve covers 221, the three valve covers 221 are arranged at intervals along the height direction. At this time, the three valve covers 221 cooperate with the receiving groove 110 to form a valve cavity with a two-row, three-chamber layout.

[0068] In another specific embodiment, when there are six valve cores 210 and three valve covers 221, the three valve covers 221 are arranged at intervals in the horizontal direction. At this time, the three valve covers 221 cooperate with the receiving groove 110 to form a valve cavity with a three-row, two-pane layout.

[0069] In another specific embodiment, when there are six valve cores 210 and two valve covers 221, the two valve covers 221 are arranged at intervals in the horizontal direction, and each valve cover 221 divides the receiving groove 110 into three relatively independent valve chambers. At this time, the two valve covers 221 and the receiving groove 110 cooperate to form a valve chamber with a two-row, three-chamber layout.

[0070] Of course, in other feasible embodiments, designers can adjust the arrangement of valve core 210 and valve cover 221 according to the specific number and usage scenario, and no specific restrictions are imposed here.

[0071] In the embodiments of this utility model, such as Figure 3 and Figure 4In the embodiment shown, the sealing cylinder 100 further includes a piston channel 130 and a piston mechanism 140 slidably disposed in the piston channel 130. The piston mechanism 140 includes a piston rod 141 and a sealing sleeve 142 disposed at the bottom of the piston rod 141. The hollow inner cavity of the piston rod 141 is used to deliver compressed gas and / or for the tension rod to pass through.

[0072] By setting the piston mechanism 140 in the piston channel 130, the piston rod 141 can move up and down, thereby driving the sealing sleeve 142 to press down and seal the bottle mouth. At this time, the high-pressure valve group 200 can deliver compressed gas to the piston rod 141 and deliver it to the preform through the piston rod 141. At the same time, the stretching rod passes through the piston rod 141 and enters the preform, pressing and stretching the bottom of the preform, making it easier for the compressed gas to inflate the bottle.

[0073] In the embodiments of this utility model, such as Figure 2 In the embodiment shown, the sealing cylinder assembly also includes a sealing cylinder air port 150 disposed on the sealing cylinder 100. The sealing cylinder air port 150 is disposed on the second end face 102 and is used to supply air to the sealing cylinder 100 to drive the piston rod 141 to press down.

[0074] By setting the sealing cylinder air port 150 on the second end face 102, the sealing cylinder air port 150 can be used to supply air to the sealing cylinder 100 to drive the piston rod 141 to press down, thereby realizing the pneumatic drive control of the movement of the piston rod 141.

[0075] Furthermore, the sealing cylinder 100 is also provided with an internal channel connecting the piston mechanism 140 and the sealing cylinder air port 150. By providing an internal channel connecting the piston mechanism 140 and the sealing cylinder air port 150 within the sealing cylinder 100, the pipeline layout is simplified, making the gas flow path more compact and efficient.

[0076] In the embodiments of this utility model, such as Figure 4 In the embodiment shown, the sealing cylinder assembly also includes a straight air passage 160 disposed within the sealing cylinder 100, the straight air passage 160 being used to connect the valve core 210 and the piston rod 141.

[0077] As can be seen from the above, the valve core 210 in this utility model is embedded in the sealing cylinder 100. The housing of the sealing cylinder 100 and the valve cover 221 cooperate to form the housing of the valve core 210, reducing the distance between the valve core 210 and the piston rod 141. At this time, the valve core 210 and the piston rod 141 can be connected by the straight air passage 160 set in the sealing cylinder 100. Compared with the existing high-pressure valve group 200 and sealing cylinder 100 being manufactured separately and then assembled together, this utility model, by setting the embedded valve core 210, can set the straight air passage 160 in the sealing cylinder 100. The straight air passage 160 significantly shortens the length of the flow channel between the valve core 210 and the piston rod 141, effectively reducing the gas loss during the bottle blowing process.

[0078] Because the valve core 210 of the high-pressure valve assembly 200 has the characteristics of high pressure and large flow, direct control by electrical signals would result in an excessively large electromagnetic component. To solve the above technical problem, in the embodiments of this utility model, such as... Figure 1 , Figure 3 and Figure 5 In the embodiment shown, the sealing cylinder assembly also includes an electromagnetic pilot valve group 300, which includes a plurality of electromagnetic pilot valves 310 disposed on the valve cover structure 220. Each electromagnetic pilot valve 310 is connected to a corresponding valve core 210, and the electromagnetic pilot valve 310 is used to drive the corresponding valve core 210 to switch between on and off states.

[0079] By setting up an electromagnetic pilot valve assembly 300, the electromagnetic pilot valve 310 can be controlled to open and close using a 24V DC signal. Each electromagnetic pilot valve 310 is connected to a corresponding valve core 210, thereby controlling low-pressure, low-flow gas to drive the valve core 210 to move, which in turn drives the valve core 210 of the high-pressure valve assembly 200 to switch between on and off states. This achieves the opening and closing control of the high-pressure valve assembly 200 and helps to reduce the volume of the electromagnetic part of the valve core 210, thereby reducing the volume of the sealing cylinder assembly.

[0080] In one specific embodiment, when six valve cores 210 are provided, the electromagnetic pilot valve assembly 300 is correspondingly provided with six electromagnetic pilot valves 310. The six electromagnetic pilot valves 310 independently control the six main valves, improving control flexibility. Furthermore, an internal channel connecting each valve core 210 to its corresponding electromagnetic pilot valve 310 can be provided within the sealing cylinder 100. The low-pressure, low-flow gas output from the electromagnetic pilot valve 310 is delivered to the valve core 210 via the internal channel, thereby actuating the valve core 210 to switch between on and off states.

[0081] In the embodiments of this utility model, such as Figure 1In the illustrated embodiment, multiple electromagnetic pilot valves 310 are arranged on the same side of the valve cover structure 220, and the sealing cylinder assembly also includes a protective cover plate 320 covering each electromagnetic pilot valve 310. By arranging multiple electromagnetic pilot valves 310 on the same side of the valve cover structure 220, the layout of the electromagnetic pilot valve assembly 300 is more compact, and it is easier to centrally arrange external pipelines and cables, thus improving the convenience of installation and maintenance.

[0082] Furthermore, by covering each electromagnetic pilot valve 310 with a protective cover plate 320, the protective cover plate 320 effectively prevents external impurities, dust and liquids from entering the interior of the electromagnetic pilot valve 310, thereby improving the protection level and operational reliability of the equipment and reducing the failure rate caused by environmental factors.

[0083] Designers may adjust the specific structure and materials of the protective cover 320 according to usage requirements, and no specific limitations are imposed here. In one feasible embodiment, such as Figure 6 In the embodiment shown, the protective cover 320 is a metal cover. Metal covers have better structural strength.

[0084] In the embodiments of this utility model, such as Figure 2 In the embodiment shown, the sealing cylinder assembly also includes a pilot air port 170 disposed on the sealing cylinder 100, the pilot air port 170 being used to connect to each electromagnetic pilot valve 310.

[0085] By setting the pilot port 170 on the sealing cylinder 100, the pilot port 170 can connect to each electromagnetic pilot valve 310. Low-pressure, low-flow control gas can be quickly and stably delivered to each electromagnetic pilot valve 310 through the pilot port 170, which improves the airflow transmission efficiency and the system dynamic response speed.

[0086] Furthermore, an internal channel can be provided in the sealing cylinder 100 to connect the pilot air port 170 with each electromagnetic pilot valve 310. Low-pressure, low-flow control gas can enter each electromagnetic pilot valve 310 through the pilot air port 170 and the internal channel, thereby facilitating the control of the on / off state of the valve core 210.

[0087] In one feasible embodiment, since the air volume required by the electromagnetic pilot valve 310 is small, only one pilot port 170 may be provided, which is connected to each electromagnetic pilot valve 310 respectively.

[0088] In another feasible embodiment, multiple pilot ports 170 can be provided, and each pilot port 170 is connected to a corresponding electromagnetic pilot valve 310, thereby improving the independence of air intake.

[0089] Designers can adjust the specific location of the pilot air port 170 according to usage requirements, and no specific restrictions are imposed here. Preferably, the pilot air port 170 is located on the second end face 102.

[0090] By setting the pilot air port 170 on the second end face 102 of the sealing cylinder 100, multiple air ports can be arranged in a concentrated manner on the second end face 102, which facilitates manufacturing and maintenance.

[0091] In the embodiments of this utility model, the designer can adjust the specific number of valve cores 210 and valve covers 221 of the high-pressure valve group 200 according to the needs of use, and no specific restrictions are made here.

[0092] In one specific embodiment, such as Figure 1 In the embodiment shown, three valve covers 221 are provided, which can divide the receiving groove 110 into six relatively independent valve chambers. The multiple valve cores 210 include a pre-blowing valve core 211, a middle-blowing valve core 212, a main-blowing valve core 213, a first recovery valve core 214, a second recovery valve core 215, and an exhaust valve core 216. The pre-blowing valve core 211 cooperates with the corresponding valve chamber to form a pre-blowing valve, the middle-blowing valve core 212 cooperates with the corresponding valve chamber to form a middle-blowing valve, the main-blowing valve core 213 cooperates with the corresponding valve chamber to form a main-blowing valve, the first recovery valve core 214 cooperates with the corresponding valve chamber to form a first recovery valve, the second recovery valve core 215 cooperates with the corresponding valve chamber to form a second recovery valve, and the exhaust valve core 216 cooperates with the corresponding valve chamber to form an exhaust valve core 216.

[0093] By setting six valve cores 210, three of which are used to control the air intake, namely the pre-blowing valve, the intermediate-blowing valve and the main-blowing valve; the other three are used to control the air output, namely the first recovery valve, the second recovery valve and the exhaust valve.

[0094] During the bottle blowing process, an electrical signal is first sent to the electromagnetic pilot valve 310 corresponding to the pre-blowing valve. The electromagnetic pilot valve 310 drives the pre-blowing valve to open, allowing the pre-blowing compressed gas to enter the preform. At the same time, the stretching rod pushes out, and the preform is initially blown into shape.

[0095] Subsequently, the pre-blowing valve is closed, and the intermediate blowing valve is opened by the electromagnetic pilot valve 310 corresponding to the intermediate blowing valve, so that the intermediate blowing compressed gas is input into the preform, causing the pressure inside the preform to increase. At this time, the preform has basically taken shape except for some fine lines.

[0096] Then, the intermediate blowing valve is closed, and the main blowing valve is opened by the electromagnetic pilot valve 310 corresponding to the main blowing valve, so that the main blowing compressed gas is input into the preform, and the pressure inside the bottle continues to rise until the preform is completely formed.

[0097] After the pressure holding time is preset, the main blowing valve is closed, and the first recovery valve is opened by the electromagnetic pilot valve 310 corresponding to the first recovery valve, so that the high-pressure gas in the bottle and the cylinder and valve body of the sealing cylinder 100 is recovered into the first air bag.

[0098] The first recovery valve is closed, and the second recovery valve is opened by the electromagnetic pilot valve 310 corresponding to the second recovery valve, so that the compressed gas in the bottle is further recovered into the second gasbag with relatively low pressure.

[0099] The second recovery valve is closed, and the exhaust valve is opened by the electromagnetic pilot valve 310 corresponding to the exhaust valve, so that the remaining compressed gas in the bottle is discharged into the atmosphere.

[0100] Furthermore, the sealing cylinder assembly also includes a throttling valve located on the pre-blowing path of the pre-blowing valve. By installing a throttling valve on the pre-blowing path, the gas flow rate can be adjusted to match the ejection speed of the stretching rod, thereby improving the preform forming quality.

[0101] In the embodiments of this utility model, such as Figure 2 The embodiment shown further includes a positioning and mounting structure disposed on the sealing cylinder 100. The positioning and mounting structure includes a plurality of mounting holes 180 disposed on the sealing cylinder 100 and at least one positioning hole 190 disposed on the sealing cylinder 100.

[0102] Specifically, multiple mounting holes 180 and positioning holes 190 are provided on the second end face 102. The multiple mounting holes 180 enhance the stability and adaptability of the connection, while the positioning holes 190 ensure assembly accuracy. Designers can adjust the specific number and position of the mounting holes 180 and positioning holes 190 according to usage needs, and no specific restrictions are imposed here.

[0103] Implementation Method 2

[0104] This invention also provides a blow molding apparatus, which includes a sealing cylinder assembly as described in Embodiment 1. The structure and effect of the sealing cylinder assembly are the same as those described in Embodiment 1, and will not be repeated here. Designers can adjust the specific type of blow molding apparatus according to usage needs, and no specific limitations are made here. For example, the blow molding apparatus may be a PET blow molding apparatus.

[0105] All articles and references disclosed herein, including patent applications and publications, are incorporated herein by reference for various purposes. The term “substantially constitutes…” used to describe a combination should include the identified element, component, part, or step, as well as other elements, components, parts, or steps that do not substantially affect the essential novelty of the combination. The use of the terms “comprising” or “including” to describe combinations of elements, components, parts, or steps herein also contemplates embodiments substantially constituted by such elements, components, parts, or steps. The use of the term “may” herein is intended to indicate that any described attribute “may” include is optional. Multiple elements, components, parts, or steps can be provided by a single integrated element, component, part, or step. Alternatively, a single integrated element, component, part, or step can be divided into multiple separate elements, components, parts, or steps. The disclosure of “a” or “an” used to describe an element, component, part, or step does not imply exclusion of other elements, components, parts, or steps.

[0106] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A sealing cylinder assembly, characterized in that, include: A sealing cylinder (100) includes a first end face (101) and a receiving groove (110) provided on the first end face (101); A high-pressure valve assembly (200) includes a plurality of valve cores (210) and a valve cover structure (220). The valve cover structure (220) includes at least one valve cover (221) that is sealed to the sealing cylinder (100) and covers the receiving groove (110). The valve cover (221) is capable of dividing the receiving groove (110) into at least one valve chamber, and each valve core (210) is disposed in one of the valve chambers.

2. The sealing cylinder assembly as described in claim 1, characterized in that, The sealing cylinder (100) assembly also includes a plurality of valve group ports (120) disposed on the sealing cylinder (100), each valve group port (120) being connected to a valve core (210).

3. The sealing cylinder assembly as described in claim 2, characterized in that, The sealing cylinder (100) includes a second end face (102), and a plurality of valve group air ports (120) are disposed on the second end face (102); the first end face (101) and the second end face (102) are disposed opposite to each other on both sides of the sealing cylinder (100).

4. The sealing cylinder assembly as described in claim 1, characterized in that, Multiple valve covers (221) are provided, and each valve cover (221) divides the receiving groove (110) into at least two valve chambers; the multiple valve covers (221) are arranged at intervals along the height direction; or, the multiple valve covers (221) are arranged at intervals along the horizontal direction.

5. The sealing cylinder assembly as described in claim 3, characterized in that, The sealing cylinder (100) further includes a piston channel (130) and a piston mechanism (140) slidably disposed in the piston channel (130). The piston mechanism (140) includes a piston rod (141) and a sealing sleeve (142) disposed at the bottom of the piston rod (141). The hollow inner cavity of the piston rod (141) is used to deliver compressed gas and / or allow a tension rod to pass through. The sealing cylinder (100) assembly also includes a sealing cylinder air port (150) disposed on the sealing cylinder (100). The sealing cylinder air port (150) is disposed on the second end face (102) and is used to supply air to the sealing cylinder (100) to drive the piston rod (141) to press down. The sealing cylinder (100) assembly also includes a straight air passage (160) disposed within the sealing cylinder (100), the straight air passage (160) being used to connect the valve core (210) and the piston rod (141).

6. The sealing cylinder assembly as described in claim 3, characterized in that, The sealing cylinder (100) assembly also includes an electromagnetic pilot valve group (300), which includes a plurality of electromagnetic pilot valves (310) disposed on the valve cover structure (220). Each electromagnetic pilot valve (310) is connected to a valve core (210), and the electromagnetic pilot valve (310) is used to drive the corresponding valve core (210) to switch between on and off states. The sealing cylinder (100) assembly also includes a pilot air port (170) disposed on the sealing cylinder (100), the pilot air port (170) being used to connect to each of the electromagnetic pilot valves (310); the pilot air port (170) is disposed on the second end face (102).

7. The sealing cylinder assembly as described in claim 6, characterized in that, Multiple electromagnetic pilot valves (310) are disposed on the same side of the valve cover structure (220), and the sealing cylinder (100) assembly also includes a protective cover plate (320) covering each electromagnetic pilot valve (310).

8. The sealing cylinder assembly as described in claim 4, characterized in that, Three valve covers (221) are provided, which can divide the receiving groove (110) into six relatively independent valve chambers. Multiple valve cores (210) include a pre-blowing valve core (211), a middle-blowing valve core (212), a main-blowing valve core (213), a first recovery valve core (214), a second recovery valve core (215), and an exhaust valve core (216). The pre-blowing valve core (211) cooperates with the corresponding valve chamber to form a pre-blowing valve. The middle-blowing valve core (212) and... The corresponding valve chambers cooperate to form a blow valve, the main blow valve core (213) cooperates with the corresponding valve chamber to form a main blow valve, the first recovery valve core (214) cooperates with the corresponding valve chamber to form a first recovery valve, the second recovery valve core (215) cooperates with the corresponding valve chamber to form a second recovery valve, and the exhaust valve core (216) cooperates with the corresponding valve chamber to form an exhaust valve core (216); the sealing cylinder (100) assembly also includes a throttle valve disposed on the pre-blow path of the pre-blow valve.

9. The sealing cylinder assembly as described in claim 3, characterized in that, The sealing cylinder (100) assembly further includes a positioning and mounting structure disposed on the sealing cylinder (100). The positioning and mounting structure includes a plurality of mounting holes (180) disposed on the sealing cylinder (100) and at least one positioning hole (190) disposed on the sealing cylinder (100). The plurality of mounting holes (180) and the positioning hole (190) are all disposed on the second end face (102).

10. A blow molding machine, characterized in that, Includes the sealing cylinder (100) assembly as described in any one of claims 1 to 9.

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