A directional heating bottle blowing apparatus
Patent Information
- Application Number
- CN202522398182.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2026-10-23
- Estimated Expiration
- 2035-11-12
AI Technical Summary
但对于横截面为非圆形的异形瓶体的成型时，这种瓶胚加热吹拉成型处理比较麻烦，若直接将均匀加热后的瓶胚放入特定的吹瓶模具进行吹气变形，由于是异形瓶体，所以吹瓶时瓶胚的变形也并非均匀，这样均匀受热的瓶胚需要不均匀的变形，容易导致温度难以控制，瓶胚吹瓶时变形量大的部位实际需要更好的加热温度，而变形量小的部位需要的加热温度低，因此，目前这种均匀加热方式的吹瓶设备难以满足异形瓶的吹瓶要求
[0011]采用了上述技术方案后，本实用新型的效果是：由于所述吹瓶设备还包括定向加热装置，所述定向加热装置包括横跨主链轨道组件两侧的支架，所述支架上设置有方便主链轨道组件通过的加热通道，所述支架上位于主链轨道组件的两侧均设置有定向加热箱，每个定向加热箱的结构均相同，所述定向加热箱靠近加热通道的一侧板设置为孔板，所述孔板上固定有若干根U字形的的定向辐射槽框，所述定向辐射槽框上下延伸，所述定向辐射槽框内固定安装有加热灯管，所述定向加热箱上还安装有朝加热通道吹风的风扇，两个所述定向加热箱的顶部还固定有抽吸罩，所述抽吸罩位于所述加热通道的上方，因此瓶胚被放置在主链轨道组件上的瓶胚座上，瓶胚座被带动移动输送，在输送的过程中，经过均匀加热装置时，由于自转驱动装置会驱动瓶胚座旋转，从而在加热的过程中旋转，完成对瓶胚的均匀加热；而瓶胚经过均匀加热装置后，由于瓶胚脱离了均匀加热装置的范围，也就脱离了自转驱动装置的驱动范围，那么瓶胚就被输送到了定向加热箱的加热通道中，由于加热灯管处于U字形的的定向辐射槽框内，因此，加热灯管就将热量定向的辐射到瓶胚上，从而完成定向加热，而由于瓶胚具有一定的厚度，因此为了避免瓶胚内外表面温差过大，利用风扇对瓶胚表面进行吹风，避免外表面温度过高，这样加热后的瓶胚直接送入到吹瓶装置上进行吹瓶，从而保证了异形瓶的吹瓶成型效果。
Smart Images
Figure CN224881264U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of plastic bottle blowing technology, and in particular to a blowing device with directional heating. Background Technology
[0002] Plastic bottles are a common type of container. In the manufacturing process, a preform is first injection molded using an injection molding machine, and then transferred to a blow molding line for blow forming. However, not all plastic bottles are circular in cross-section; various other shapes are used as containers. Circular preforms are relatively simple and convenient to heat-blow mold. During preform transport, a uniform heating chamber is used to heat the preform evenly before blow molding. However, for irregularly shaped preforms with non-circular cross-sections, the heat-blow molding process is more complicated. If the uniformly heated preform is directly placed into a specific blow molding die for deformation, the deformation during blow molding is not uniform due to the irregular shape. This uneven deformation, requiring uniform heating, makes temperature control difficult. Areas with large deformation require higher heating temperatures, while areas with small deformation require lower temperatures. Therefore, current blow molding equipment using uniform heating methods is insufficient for the requirements of irregularly shaped bottles. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a blow molding equipment with directional heating, which can directionally heat the conveyed preforms to meet the blow molding requirements of irregularly shaped bottles.
[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a blow molding machine with directional heating, including a frame, a main chain track assembly driven by a main power device is arranged on the frame, a plurality of preform holders are rotatably arranged at equal intervals on the main circulating chain of the main chain track assembly, a blow molding device for blowing preforms is arranged on the frame, a uniform heating device for uniformly heating the preforms on the preform holders is arranged upstream of the blow molding device, a driven sprocket is arranged at the lower end of each preform holder, and a rotation drive device is also installed on the frame to drive the driven sprockets within the range of the uniform heating device to rotate. The blow molding machine also includes a directional heating device, the directional heating device... The heating device includes a support spanning both sides of the main chain track assembly. The support has a heating channel for the main chain track assembly to pass through. Two directional heating boxes are installed on both sides of the main chain track assembly on the support. Each directional heating box has an identical structure. The side plate of each directional heating box closest to the heating channel is a perforated plate. Several U-shaped directional radiation slots are fixed to the perforated plate, extending vertically. Heating lamps are fixedly installed inside the directional radiation slots. A fan is also installed on each directional heating box to blow air towards the heating channel. A suction hood is fixed to the top of both directional heating boxes, positioned above the heating channel.
[0005] As a preferred embodiment, the directional heating box has an upper crossbeam and a lower crossbeam fixed inside. The directional radiation groove frame is fixed on the upper and lower crossbeams. The upper and lower crossbeams are made of profiles, and straight grooves are provided on all four side walls of the profiles. The directional radiation groove frame includes a bottom wall and two side walls. Vertically extending vertical slots are provided on the bottom wall. The directional radiation groove frame is fixed on the straight grooves by bolt and nut mechanisms constrained within the vertical slots. Correspondingly, the perforated plate is also provided with clearance holes to facilitate the adjustment of the position of the directional radiation groove frame.
[0006] As a preferred embodiment, the heating lamp tube includes a lamp tube body, with an upper lamp holder and a lower lamp holder fixedly installed at both ends of the lamp tube body, the lamp tube body being located within the directional radiation groove frame, and the upper and lower lamp holders being provided with lamp holder adjustment strip holes perpendicular to the length direction of the profile, the upper and lower lamp holders being fixed on the straight slide groove by a bolt and nut structure constrained within the lamp holder adjustment strip holes.
[0007] As a preferred embodiment, the bracket is a height-adjustable lifting bracket.
[0008] As a preferred embodiment, the self-rotation drive device includes a self-rotation sprocket mounted on the frame and driven by a self-rotation motor. A self-rotation drive chain that runs in a cycle is mounted on the self-rotation sprocket. The running path of the self-rotation drive chain covers the heating conveying path of the uniform heating device. One side of the self-rotation drive chain is a self-rotation drive section, which meshes with a driven sprocket on the main chain track assembly on the heating conveying path. The driven sprocket on the main chain track assembly separates from the self-rotation drive section of the self-rotation drive chain before entering the directional heating box.
[0009] As a preferred embodiment, the uniform heating device includes multiple uniform heating boxes, which are spaced apart on the running route of the main chain track assembly. Each uniform heating box has the same structure. A running guide structure corresponding to each uniform heating box is fixedly installed on the track of the main chain track assembly. The running guide structure is located below each uniform heating box to guide and support the self-rotating drive chain.
[0010] As a preferred embodiment, the running guide structure includes a connecting block fixed on the track of the main chain track assembly, and two parallel guide support plates fixed on the connecting block. Each guide support plate has an L-shaped cross-section, and the horizontal plate portion of the guide support plate supports the self-rotating drive chain.
[0011] After adopting the above technical solution, the effect of this utility model is as follows: Since the blow molding equipment also includes a directional heating device, the directional heating device includes a support spanning both sides of the main chain track assembly. The support is provided with a heating channel to facilitate the passage of the main chain track assembly. Directional heating boxes are provided on both sides of the support of the main chain track assembly, and each directional heating box has the same structure. The side plate of the directional heating box near the heating channel is a perforated plate. Several U-shaped directional radiation groove frames are fixed on the perforated plate, extending vertically. Heating lamps are fixedly installed inside the directional radiation groove frames. A fan is also installed on the directional heating box to blow air towards the heating channel. A suction hood is fixed to the top of both directional heating boxes, located above the heating channel. Therefore, the preform is placed on the preform holder on the main chain track assembly. On the upper part, the preform holder is moved and conveyed. During the conveying process, when it passes through the uniform heating device, the self-rotating drive device drives the preform holder to rotate, thus rotating during the heating process and completing the uniform heating of the preform. After passing through the uniform heating device, the preform leaves the range of the uniform heating device and also the driving range of the self-rotating drive device. Then, the preform is conveyed into the heating channel of the directional heating box. Since the heating lamp is located in the U-shaped directional radiation groove frame, the heating lamp radiates heat directionally onto the preform, thus completing directional heating. Since the preform has a certain thickness, in order to avoid excessive temperature difference between the inner and outer surfaces of the preform, a fan is used to blow air onto the surface of the preform to prevent the outer surface temperature from becoming too high. In this way, the heated preform is directly sent to the blow molding device for blow molding, thus ensuring the blow molding effect of irregular-shaped bottles.
[0012] Furthermore, since the directional heating box has an upper and lower crossbeam fixed inside, and the directional radiation groove frame is fixed on the upper and lower crossbeams, and the upper and lower crossbeams are made of profiles, each with a straight groove on its four side walls, the directional radiation groove frame includes a bottom wall and two side walls. The bottom wall has vertically extending vertical slots, and the directional radiation groove frame is fixed to the straight grooves by bolts and nuts constrained within these vertical slots. Correspondingly, the perforated plate also has clearance holes to facilitate position adjustment of the directional radiation groove frame. Therefore, by providing vertical slots and straight grooves, the horizontal and vertical installation positions of the directional radiation groove frame can be adjusted, thus better meeting the requirements for compatibility with heating lamps.
[0013] Furthermore, since the heating lamp tube includes a lamp tube body, with an upper lamp holder and a lower lamp holder fixedly installed at both ends of the lamp tube body, and the lamp tube body is located within the directional radiation groove frame, the upper and lower lamp holders are provided with lamp holder adjustment slots perpendicular to the length of the profile, and the upper and lower lamp holders are fixed on the straight slide groove by bolt and nut structures constrained within the lamp holder adjustment slots. Therefore, the positions of the upper and lower lamp holders can be adjusted through the lamp holder adjustment slots, thereby ultimately adjusting the distance between the lamp tube body and the preform in the heating channel, and thus adjusting the heat radiation effect of the lamp tube body.
[0014] Furthermore, since the support is a height-adjustable lifting support, the height of the directional heating box can be adjusted using this lifting support, thereby meeting the directional heating requirements of preforms of different lengths.
[0015] Furthermore, since the self-rotation drive device includes a self-rotation sprocket mounted on the frame and driven by a self-rotation motor, and a cyclically running self-rotation drive chain is mounted on the self-rotation sprocket, the running path of the self-rotation drive chain covers the heating conveying path of the uniform heating device. One side of the self-rotation drive chain is a self-rotation drive segment, which meshes with a driven sprocket on the main chain track assembly on the heating conveying path. The driven sprocket on the main chain track assembly separates from the self-rotation drive segment of the self-rotation drive chain before entering the directional heating box. Therefore, the self-rotation drive chain can be driven by the self-rotation motor to run cyclically. During operation, the self-rotation drive segment only covers the heating conveying path of the uniform heating device, so the self-rotation drive segment meshes with the driven sprocket to drive the preform holder to rotate. In the heating channel of the directional heating box, the driven sprocket on the preform holder has separated from the self-rotation drive chain, thereby achieving directional heating of the preform.
[0016] Furthermore, since the uniform heating device includes multiple uniform heating boxes, which are spaced apart on the running path of the main chain track assembly, each uniform heating box has the same structure. A running guide structure corresponding to each uniform heating box is fixedly installed on the track of the main chain track assembly. The running guide structure is located below each uniform heating box to guide and support the self-rotating drive chain. The running guide structure includes a connecting block fixed on the track of the main chain track assembly, and two parallel guide support plates are fixed on the connecting block. The cross-section of the guide support plate is L-shaped, and the horizontal part of the guide support plate supports the self-rotating drive chain. Therefore, the self-rotating drive chain is supported by the guide support plates during operation, resulting in less wobbling in the self-rotating drive section of the chain, allowing for better and more reliable engagement with the self-rotating sprocket. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a three-dimensional structural view of an embodiment of the present utility model;
[0019] Figure 2 This is a perspective view of another embodiment of the present utility model;
[0020] Figure 3 yes Figure 2 An enlarged view at point A;
[0021] Figure 4 This is a schematic diagram of the installation of a directional heating device on a blow molding machine;
[0022] Figure 5 This is a three-dimensional view of the directional heating device;
[0023] Figure 6 This is a 3D view of the directional heating box;
[0024] Figure 7 This is a front view of the directional heating box with the perforated plate hidden.
[0025] In the attached diagram: 1. Frame; 2. Main chain track assembly; 3. Preform holder; 4. Blow molding device; 5. Uniform heating device; 51. Uniform heating box; 52. Connecting block; 53. Guide support plate; 6. Driven sprocket; 7. Rotation drive device; 71. Rotation sprocket; 72. Rotation motor; 73. Rotation steering wheel; 8. Directional heating device; 81. Support; 82. Heating channel; 83. Directional heating box; 84. Perforated plate; 85. Directional radiation trough frame; 851. Trough bottom wall; 852. Trough side wall; 853. Vertical strip hole; 86. Heating lamp; 861. Lamp body; 862. Upper lamp holder; 863. Lower lamp holder; 864. Lamp holder adjustment strip hole; 87. Fan; 88. Suction hood; 89. Upper crossbeam; 810. Lower crossbeam. Detailed Implementation
[0026] The present invention will be further described in detail below through specific embodiments.
[0027] like Figure 1-7As shown, a blow molding machine with directional heating includes a frame 1. A main chain track assembly 2, driven by a main power device, is mounted on the frame 1. A plurality of preform holders 3 are rotatably arranged at equal intervals on the main circulating chain of the main chain track assembly 2. A blow molding device 4 for blowing preforms is mounted on the frame 1. A uniform heating device 5 for uniformly heating the preforms on the preform holders 3 is located upstream of the blow molding device 4. A driven sprocket 6 is mounted at the lower end of each preform holder 3. A rotation drive device 7 is also mounted on the frame 1 to drive the driven sprockets 6 within the range of the uniform heating device 5 to rotate. The blow molding machine also includes a directional heating device, which includes a support 81 spanning both sides of the main chain track assembly 2. The support 81 is provided with a heating channel 82 to facilitate the passage of the main chain track assembly 2. On both sides of the main chain track assembly 2, there are directional heating boxes 83. Each directional heating box 83 has the same structure. The side plate of the directional heating box 83 near the heating channel 82 is a perforated plate 84. Several U-shaped directional radiation slot frames 85 are fixed on the perforated plate 84. The directional radiation slot frames 85 extend vertically. Heating lamp tubes 86 are fixedly installed inside the directional radiation slot frames 85. A fan 87 is also installed on the directional heating box 83 to blow air towards the heating channel 82. A suction hood 88 is also fixed on the top of the two directional heating boxes 83. The suction hood 88 is located above the heating channel 82.
[0028] In this embodiment, the support 81 is a height-adjustable lifting support 81. An upper crossbeam 89 and a lower crossbeam 810 are fixed inside the directional heating box 83. A directional radiation groove frame 85 is fixed on the upper crossbeam 89 and the lower crossbeam 810. The upper crossbeam 89 and the lower crossbeam 810 are made of profiles, and straight grooves 811 are provided on all four side walls of the profiles. The directional radiation groove frame 85 includes a bottom wall 851 and two side walls 852. A vertically extending vertical slot 853 is provided on the bottom wall 851. The directional radiation groove frame 85 is fixed on the straight groove 811 by a bolt and nut mechanism constrained within the vertical slot 853. Correspondingly, an avoidance hole is also provided on the perforated plate 84 to facilitate the adjustment of the position of the directional radiation groove frame 85. The heating lamp tube 86 includes a lamp tube body 861. An upper lamp holder 862 and a lower lamp holder 863 are fixedly installed at both ends of the lamp tube body 861. The lamp tube body 861 is located inside the directional radiation groove frame 85. The upper lamp holder 862 and the lower lamp holder 863 are provided with lamp holder adjustment strip holes 864 perpendicular to the length direction of the profile. The upper lamp holder 862 and the lower lamp holder 863 are fixed on the straight slide groove 811 by a bolt and nut structure constrained in the lamp holder adjustment strip holes 864.
[0029] The self-rotation drive device 7 includes a self-rotation sprocket 71 mounted on the frame 1 and driven by a self-rotation motor 72. A self-rotation drive chain is mounted on the self-rotation sprocket 71 and runs in a cycle. The running path of the self-rotation drive chain covers the heating conveying path of the uniform heating device 5. One side of the self-rotation drive chain is a self-rotation drive section. The self-rotation drive section meshes with the driven sprocket 6 on the main chain track assembly 2 on the heating conveying path. The driven sprocket 6 on the main chain track assembly 2 separates from the self-rotation drive section of the self-rotation drive chain before entering the directional heating box 83.
[0030] In this embodiment, the uniform heating device 5 includes multiple uniform heating boxes 51, which are spaced apart on the running path of the main chain track assembly 2. Each uniform heating box 51 has the same structure. A running guide structure corresponding to each uniform heating box 51 is fixedly installed on the track of the main chain track assembly 2. The running guide structure is located below each uniform heating box 51 to guide and support the self-rotating drive chain. The running guide structure includes a connecting block 52 fixed on the track of the main chain track assembly 2. Two parallel guide support plates 53 are fixed on the connecting block 52. The cross-section of the guide support plate 53 is L-shaped, and the horizontal part of the guide support plate 53 supports the self-rotating drive chain. The self-rotating drive chain is shown in the attached figure; other parts are omitted.
[0031] like Figure 2 As shown, the frame 1 is equipped with multiple rotating steering wheels 73, one of which is upstream of the uniform heating path, one of which is downstream of the uniform heating path, and one of which is in the middle of the uniform heating path, completely covering the entire uniform heating path. The rotating steering wheels 73 cooperate with the rotating sprocket 71, the rotating drive chain, the rotating motor 72, and the driven sprocket 6 to achieve uniform heating of the preform.
[0032] During bottle blowing, the preform is placed on the preform holder 3. The self-rotating motor 72 drives the self-rotating sprocket 71, and the self-rotating drive chain runs in a cycle. The preform holder 3 rotates. When it passes through the uniform heating device 5, the preform is uniformly heated because the preform holder 3 rotates during the heating process. The self-rotating drive section only covers the heating and conveying path of the uniform heating device 5. After passing through the uniform heating device 5, the preform leaves the range of the uniform heating device 5 and also leaves the driving range of the self-rotating drive device 7. The preform is then conveyed into the heating channel 82 of the directional heating box 83. The upper lamp holder 86 can be adjusted through the lamp holder adjustment slot 864. The position of the lower lamp holder 863 is adjusted, and the distance between the lamp body 861 and the preform in the heating channel 82 is adjusted. The heating lamp 86 is located in the U-shaped directional radiation groove frame 85, which can radiate heat to the preform in a directional manner. The horizontal and vertical installation positions of the directional radiation groove frame 85 can also be adjusted through the vertical slot 853 and the straight slide 811 to better directionally heat the preform. In addition, the fan 87 blows air on the surface of the preform to avoid the outer surface temperature from getting too high. The heated preform is then sent to the blow molding device 4 for blow molding, ensuring the blow molding effect of irregularly shaped bottles. In addition, the height of the directional heating box 83 can be adjusted by the lifting bracket 81 according to the different directional heating requirements of preforms of different lengths.
[0033] The servo motor and other actuators, gear transmission mechanisms, and lead screw and nut mechanisms mentioned in this embodiment are all current conventional technologies. The specific structure, principle, and other designs of the motor and other transmission mechanisms are disclosed in detail in the 5th edition of "Mechanical Design Handbook" (5th edition, 28th printing, April 2008, Beijing). These are existing technologies with clear and straightforward structures. The 3rd edition of "Modern Practical Pneumatic Technology" (SMC training material) published by Machinery Industry Press on August 1, 2008, also discloses vacuum components, gas circuits, and program control in detail, indicating that the air circuit structure in this embodiment is also existing technology and clear and straightforward. The book "Motor Drive and Speed Regulation" published by Chemical Industry Press on July 1, 2015, also describes the control of the motor and limit switches in detail. Therefore, the circuit and air circuit connections are clear.
[0034] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.
Claims
1. A blow molding machine with directional heating, comprising a frame, a main chain track assembly driven by a main power device being mounted on the frame, a plurality of preform holders being rotatably mounted at equal intervals on the main circulating chain of the main chain track assembly, a blow molding device for blowing preforms being mounted on the frame, a uniform heating device for uniformly heating the preforms on the preform holders being mounted upstream of the blow molding device, a driven sprocket being mounted at the lower end of each preform holder, and a rotation drive device for driving the driven sprockets within the range of the uniform heating device to rotate on the frame, characterized in that: The blow molding equipment also includes a directional heating device, which includes a support spanning both sides of the main chain track assembly. The support is provided with a heating channel to facilitate the passage of the main chain track assembly. directional heating boxes are provided on both sides of the support of the main chain track assembly, and each directional heating box has the same structure. The side plate of the directional heating box near the heating channel is a perforated plate. Several U-shaped directional radiation groove frames are fixed on the perforated plate, extending vertically. Heating lamps are fixedly installed inside the directional radiation groove frames. A fan is also installed on the directional heating box to blow air towards the heating channel. A suction hood is fixed on the top of the two directional heating boxes, and the suction hood is located above the heating channel.
2. The blow molding equipment with directional heating as described in claim 1, characterized in that: The directional heating box has an upper crossbeam and a lower crossbeam fixed inside. The directional radiation groove frame is fixed on the upper crossbeam and the lower crossbeam. The upper crossbeam and the lower crossbeam are made of profiles. Straight grooves are provided on the four side walls of the profiles. The directional radiation groove frame includes a bottom wall and two side walls. The bottom wall has vertically extending vertical slots. The directional radiation groove frame is fixed on the straight grooves by bolt and nut mechanisms constrained in the vertical slots. Correspondingly, the perforated plate is also provided with clearance holes to facilitate the adjustment of the position of the directional radiation groove frame.
3. The blow molding equipment with directional heating as described in claim 2, characterized in that: The heating lamp tube includes a lamp tube body, with an upper lamp holder and a lower lamp holder fixedly installed at both ends of the lamp tube body. The lamp tube body is located within the directional radiation groove frame. The upper and lower lamp holders are provided with lamp holder adjustment strip holes perpendicular to the length direction of the profile. The upper and lower lamp holders are fixed on the straight slide groove by bolt and nut structures constrained within the lamp holder adjustment strip holes.
4. The blow molding equipment with directional heating as described in claim 3, characterized in that: The support frame is a height-adjustable lifting support frame.
5. The blow molding equipment with directional heating as described in claim 4, characterized in that: The self-rotation drive device includes a self-rotation sprocket mounted on the frame and driven by a self-rotation motor. A self-rotation drive chain that runs in a cycle is mounted on the self-rotation sprocket. The running path of the self-rotation drive chain covers the heating conveying path of the uniform heating device. One side of the self-rotation drive chain is a self-rotation drive section. The self-rotation drive section meshes with a driven sprocket on the main chain track assembly on the heating conveying path. The driven sprocket on the main chain track assembly separates from the self-rotation drive section of the self-rotation drive chain before entering the directional heating box.
6. The blow molding equipment with directional heating as described in claim 5, characterized in that: The uniform heating device includes multiple uniform heating boxes, which are spaced apart on the running route of the main chain track assembly. Each uniform heating box has the same structure. The main chain track assembly has a running guide structure that corresponds to each uniform heating box. The running guide structure is located below each uniform heating box to guide and support the self-rotating drive chain.
7. The blow molding equipment with directional heating as described in claim 6, characterized in that: The running guide structure includes a connecting block fixed on the track of the main chain track assembly. Two parallel guide support plates are fixed on the connecting block. The cross-section of the guide support plate is L-shaped, and the horizontal plate portion of the guide support plate supports the self-rotating drive chain.