A gas guide structure for a hollow blow molding machine
By designing the air conduction structure of the hollow blow molding machine, the combination of the flow channel and the control module can achieve the discharge of gas and dirt, solving the problem of dirt reflow, improving product quality, and reducing exhaust noise.
Patent Information
- Application Number
- CN202421521504.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-06-28
Smart Images
Figure CN222727374U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of hollow blow molding machines, and in particular to an air guide structure of a hollow blow molding machine. Background Art
[0002] Plastic processing machine is a molding machine, which mainly uses the wind force blown out by the machine to blow the plastic body into a certain shape of the mold cavity and then make the product. The typical type of plastic processing machine, such as the one widely used in PE product production lines, is the hollow blow molding machine.
[0003] Generally, a hollow blow molding machine includes an extrusion unit, a mold and a blowing unit. The extrusion unit extrude thermoplastic resin into the mold in the form of a tubular plastic preform, and then the blowing unit blows air into the plastic preform to make it fit tightly against the mold to obtain a bottle-shaped product. The extrusion unit and the blowing unit work together to mass-produce products.
[0004] The blowing unit includes an air guide structure, which is connected to an air source. One or more air guide structures are provided for the mold to realize synchronous and efficient production on multiple molds based on the designed blowing and exhaust rhythm.
[0005] The rationality of the setting of the air guide structure and the quality of the mold reflect the quality of the product after molding.
[0006] The common type of air guide structure includes a connecting block, which has two air flow openings, one of which is connected to an air source, and the other is connected to a plastic preform to be blown. The air source supplies air to one of the air flow openings so that the gas enters the plastic preform to be blown through the other air flow opening for blow molding. After the blow molding is completed and the product is formed, the blow molding overflow gas in the product returns to the original path.
[0007] However, sometimes users hope that the gas will not return to the original path. When there is dirt such as oil in the product, the gas returning to the original path will carry the dirt into the gas guide structure, and the dirt in the gas guide structure is usually difficult to clean. Utility Model Content
[0008] In order to prevent dirt in the product from flowing back, the present application provides an air guide structure for a hollow blow molding machine.
[0009] The air guide structure of a hollow blow molding machine provided in this application adopts the following technical solution:
[0010] A gas guide structure of a hollow blow molding machine includes a connecting block, wherein the connecting block is provided with a flow channel 1, one port of the flow channel 1 is used to communicate with an air source, and the other port of the flow channel 1 is used to communicate with a plastic mold embryo; the connecting block is also provided with a flow channel 2, one port of the flow channel 2 is used to communicate with the plastic mold embryo, and the other port of the flow channel 2 is used to communicate with the external environment; the flow channel 2 is provided with an opening and closing part and a pressure detection part, and the connecting block is provided with a control module, and the control module controls the opening and closing part to open or close the flow channel 2 in response to a detection signal of the pressure detection part.
[0011] By adopting the above technical solution, first ensure that the opening and closing part closes the flow channel two, at which time the air source can supply air to the flow channel one, and the gas enters the plastic mold for blow molding; after the blow molding is completed and the product is formed, the air pressure in the flow channel two connected to the inside of the product will increase. When the air pressure rises to a certain value, the control module controls the opening and closing part to open, and the gas inside the product will reach the external environment through the flow channel two, and the dirt that may exist inside the product will be carried by the gas and flow out through the flow channel two.
[0012] In a specific possible implementation mode, a collecting groove is opened at the upper end of the connecting block, and the port of the second flow channel communicating with the external environment is an air outlet, and the air outlet is located on the inner bottom surface of the collecting groove.
[0013] By adopting the above technical solution, the dirt will be carried by the gas and discharged from the gas outlet, and the dirt will reach the collection tank and be collected.
[0014] In a specific possible implementation manner, the inner bottom surface of the collecting tank is inclined downward from the gas outlet toward the periphery.
[0015] By adopting the above technical solution, dirt in the collection tank is prevented from falling into the second flow channel through the air outlet.
[0016] In a specific possible implementation manner, a blocking net is provided on the slot of the collecting slot, and the blocking net is used to prevent dirt from being blown out of the collecting slot.
[0017] By adopting the above technical solution, the retaining net can prevent dirt from being blown out of the collection tank.
[0018] In a specific feasible implementation scheme, a mounting seat is provided on the connecting block, the retaining net is connected to the mounting seat and the retaining net and the mounting seat are rotatably connected; a clamping piece is provided on the retaining net, and a deformable clamping piece is provided on the connecting block, and the clamping piece is clamped in the clamping piece.
[0019] By adopting the above technical solution, the engaging member can be disengaged from the locking member and then the retaining net can be rotated and lifted up, which makes it easy to clean the collecting tank.
[0020] In a specific possible implementation manner, the engaging member includes a locking pin column at an end portion, the locking member includes a locking hole formed on the end portion, and the locking pin column is configured to be able to be locked into the locking hole.
[0021] In a specific possible implementation manner, the pressure detection component is a pressure sensor, and the opening and closing component is a valve.
[0022] In a specific possible implementation manner, a clay layer for sound absorption is further provided on the inner wall of the second flow channel.
[0023] By adopting the above technical solution, the clay layer can absorb sound to prevent loud noise from occurring during exhaust.
[0024] In summary, the present application includes at least one of the following beneficial technical effects:
[0025] 1. First, ensure that the opening and closing parts close the second flow channel. At this time, the air source can supply air to the first flow channel, and the air enters the plastic preform for blow molding. After the blow molding is completed, the air pressure in the second flow channel connected to the inside of the product will increase. When the air pressure rises to a certain value, the control module controls the opening and closing parts to open, and the air inside the product will reach the external environment through the second flow channel, and the dirt that may exist inside the product will be carried by the gas and flow out through the second flow channel.
[0026] 2. The dirt will be carried by the gas and discharged from the gas outlet and blocked by the blocking net. The dirt will reach the collection tank and be collected. Apply force to separate the clamping part from the locking part and then rotate and lift the blocking net. At this time, the collection tank can be cleaned;
[0027] 3. The clay layer can absorb sound to prevent loud noise during exhaust. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] Figure 1 It is a schematic diagram of the overall structure of an air guide structure of a hollow blow molding machine according to an embodiment of the present application.
[0029] Figure 2 It is a cross-sectional view of the air guide structure of a hollow blow molding machine.
[0030] Figure 3 It is a schematic diagram for illustrating the structure of a bayonet component.
[0031] Explanation of the reference numerals: 1. Connecting block; 11. Flow channel 1; 12. Flow channel 2; 121. Air outlet; 13. Collecting tank; 2. Opening and closing member; 3. Pressure detection member; 4. Blocking net; 5. Mounting seat; 6. Connecting member; 61. Pin column; 7. Pin member; 71. Pin hole; 8. Clay layer. DETAILED DESCRIPTION
[0032] The present application is further described in detail below in conjunction with the accompanying drawings.
[0033] The embodiment of the present application discloses an air guide structure of a hollow blow molding machine, which is used to discharge and collect dirt in a product.
[0034] Reference Figure 1 and Figure 2 A gas guide structure of a hollow blow molding machine includes a connecting block 1, the connecting block 1 is provided with a flow channel 11, the upper port of the flow channel 11 is used to communicate with an air source, and the lower port of the flow channel 11 is used to communicate with a plastic preform; the connecting block 1 is also provided with a flow channel 12, the lower port of the flow channel 12 is used to communicate with the plastic preform, and the upper port of the flow channel 12 is used to communicate with the external environment.
[0035] The flow channel 11 is used to allow air to enter the plastic mold, and the flow channel 2 12 is used to allow the gas in the plastic mold to be discharged. The air intake and exhaust are performed in different flow channels.
[0036] Reference Figure 2 In order to ensure the normal blow molding of the plastic preform, the flow channel 12 is provided with an opening and closing component 2 and a pressure detection component 3. The opening and closing component 2 is a valve, and the pressure detection component 3 is a pressure sensor. The connecting block 1 is provided with a control module. The control module controls the opening and closing component 2 to open or close the flow channel 12 in response to the detection signal of the pressure detection component 3.
[0037] When the gas source supplies gas to the flow channel 11, the gas enters the plastic mold to perform blow molding, and the opening and closing member 2 is in a normally closed state;
[0038] After the product is formed by blow molding, the air pressure in the flow channel 2 12 connected to the inside of the product will gradually increase. When the air pressure rises to a certain value, the pressure sensor sends a signal to the control module, and the control module controls the opening and closing part 2 to open the flow channel 2 12. The gas inside the product will reach the external environment through the flow channel 2 12, and the dirt that may exist inside the product will also be carried by the gas and flow out through the flow channel 2 12.
[0039] Reference Figure 2 In order to facilitate the collection of blown dirt, a collection groove 13 is provided at the upper end of the connection block 1. The port through which the flow channel 12 communicates with the external environment is an air outlet 121. The air outlet 121 is located on the inner bottom surface of the collection groove 13. Specifically, the inner bottom surface of the collection groove 13 is inclined downward from the air outlet 121 to the outer circumference. A blocking net 4 is provided on the notch of the collection groove 13 to prevent dirt from being blown out of the collection groove 13.
[0040] Therefore, the dirt carried by the gas will hit the baffle 4 through the gas outlet 121, and then the dirt will fall into the collection tank 13 and be collected. Liquid dirt such as oil may also hit and adhere to the baffle 4 and flow into the collection tank 13.
[0041] Reference Figure 1In order to facilitate opening the retaining net 4 to clean the collecting tank 13, a mounting seat 5 is provided on the connecting block 1, and the retaining net 4 is connected to the mounting seat 5 and the retaining net 4 and the mounting seat 5 are rotatably connected; Figure 3 The blocking net 4 is provided with a clamping member 6, and the connecting block 1 is provided with a deformable clamping member 7, the material of the clamping member 7 is plastic, and the clamping member 6 is clamped in the clamping member 7. Specifically, the clamping member 6 includes a clamping pin 61 at the right end, and the clamping pin 7 includes a clamping hole 71 formed on the upper end, and the clamping pin 61 can be clamped into the clamping hole 71 and the clamping pin 61 can also be separated from the clamping hole 71.
[0042] Reference Figure 2 A clay layer 8 is also provided on the inner wall of the second flow channel 12. The clay layer 8 can absorb sound to prevent loud noise during exhaust. The clay layer 8 is usually wear-resistant, temperature-resistant and corrosion-resistant.
[0043] The implementation principle of the air guide structure of a hollow blow molding machine in the embodiment of the present application is:
[0044] First, ensure that the opening and closing member 2 closes the flow channel 2 12, and the air source supplies air to the flow channel 1 11, and the gas enters the plastic mold for blow molding; after the blow molding is completed and the product is formed, the air pressure in the flow channel 2 12 connected to the inside of the product gradually increases. When the air pressure rises to a certain value, the pressure sensor sends a signal to the control module, and the control module controls the opening and closing member 2 to open. The gas inside the product will reach the external environment through the flow channel 2 12, and the dirt that may exist inside the product will be carried by the gas through the flow channel 2 12 and flow out.
[0045] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. An air guide structure for a hollow blow molding machine, characterized in that: The invention comprises a connection block (1), wherein the connection block (1) is provided with a flow channel (11), one port of which is used to communicate with an air source, and the other port of which is used to communicate with a plastic preform; the connection block (1) is also provided with a flow channel (12), one port of which is used to communicate with a plastic preform, and the other port of which is used to communicate with an external environment; the flow channel (12) is provided with an opening and closing component (2) and a pressure detection component (3), and the connection block (1) is provided with a control module, and the control module controls the opening and closing component (2) to open or close the flow channel (12) in response to a detection signal of the pressure detection component (3).
2. The air guide structure of a hollow blow molding machine according to claim 1, characterized in that: The upper end of the connection block (1) is provided with a collecting groove (13); the port through which the second flow channel (12) communicates with the external environment is an air outlet (121); and the air outlet (121) is located on the inner bottom surface of the collecting groove (13).
3. The air guide structure of a hollow blow molding machine according to claim 2, characterized in that: The inner bottom surface of the collecting tank (13) slopes downward from the gas outlet (121) toward the outer periphery.
4. The air guide structure of a hollow blow molding machine according to claim 2, characterized in that: A blocking net (4) is provided on the notch of the collecting trough (13), and the blocking net (4) is used to prevent dirt from being blown out of the collecting trough (13).
5. The air guide structure of a hollow blow molding machine according to claim 4, characterized in that: The connection block (1) is provided with a mounting seat (5), the blocking net (4) is connected to the mounting seat (5), and the blocking net (4) and the mounting seat (5) are rotatably connected; the blocking net (4) is provided with a clamping piece (6), the connection block (1) is provided with a clamping piece (7) with deformation capability, and the clamping piece (6) is clamped in the clamping piece (7).
6. The air guide structure of a hollow blow molding machine according to claim 5, characterized in that: The clamping member (6) comprises a clamping pin (61) at an end, the clamping member (7) comprises a clamping hole (71) formed at the end, and the clamping pin (61) is configured to be capable of being clamped into the clamping hole (71).
7. The air guide structure of a hollow blow molding machine according to claim 1, characterized in that: The pressure detection component (3) is a pressure sensor, and the opening and closing component (2) is a valve.
8. The air guide structure of a hollow blow molding machine according to claim 1, characterized in that: A clay layer (8) for sound absorption is also provided on the inner wall of the second flow channel (12).