Hot filling bottle forming device
By using high-pressure gas convection technology in the hot filling bottle forming device, the problems of insufficient temperature bearing capacity and incomplete shaping of PET bottles are solved, and the temperature improvement and shaping effect are improved.
Patent Information
- Application Number
- CN202420975098.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-07
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-07
AI Technical Summary
The existing PET-material bottles have limited temperature bearing capacity when used, resulting in a reduction in the use range and a reduction in effect. The increase in mold temperature during the blow molding process leads to the bottle not being completely fixed, resulting in a "sagging", resulting in a high defect rate.
A hot filling bottle forming device is designed, by using a stretch rod and a stage during the blow molding process, high-pressure gas is input into the inside of the bottle preform, forming gas convection and enhancing the cooling and setting effect.
The temperature resistance of PET-material bottles has been increased to 85℃-95℃, which improves the use effect and scope of the bottle, and avoids the situation of "deflation" after the bottle is taken out, reducing the defective rate.
Smart Images
Figure CN222431561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bottle molding, in particular to a hot filling bottle molding device. Background Art
[0002] At present, in the process of bottle blow molding, especially bottles made of PET material, generally speaking, bottles blown out of this material cannot be used at temperatures exceeding 75°C (such as for liquids), that is, the temperature-bearing capacity of this type of bottle is limited, resulting in a narrowing of its scope of use and a reduction in its use effect; for this problem, the industry has also tried to make improvements in the blow molding process, such as increasing the temperature of the blow molding mold (to achieve crystallization of the bottle surface and achieve a modification effect) so that the resulting bottle can be more heat-resistant, but due to the increase in the temperature of the blow molding mold (the effect of the cooling process is not good), the bottle taken out after molding has not reached a completely fixed state, that is, there is still residual temperature on the bottle, resulting in the bottle being "deflated", resulting in a high defective rate or poor quality, and the technical problem is still not well solved; for this reason, we propose a hot filling bottle molding device. Utility Model Content
[0003] In view of the deficiencies of the prior art, the utility model provides a hot filling bottle forming device, which can effectively solve the problems raised in the above-mentioned background technology after being improved.
[0004] The technical solution of the utility model is:
[0005] A hot filling bottle forming device comprises a workbench, a mold, a first driving device for driving the mold to close the mold, a stretching rod, a second driving device for driving the stretching rod to move, and a loading platform;
[0006] The second driving device is fixedly connected to the workbench, the moving end of the second driving device is connected to the stretching rod, the loading platform is arranged above the stretching rod, the loading platform is used to place the bottle blank, the inside of the loading platform is provided with an air inlet hole for passing the stretching rod, and the surface of the stretching rod is provided with an air outlet hole;
[0007] The first driving device drives the mold to close the mold and place the bottle blank inside the mold cavity of the mold.
[0008] Furthermore, the mold includes a first mold and a second mold, and the workbench is respectively provided with a first support rod and a second support rod, a sliding rod is fixedly connected between the first support rod and the second support rod, the first mold is slidably connected to the sliding rod through a first connecting plate, and the second mold is slidably connected to the sliding rod through a second connecting plate.
[0009] Furthermore, the first driving device includes a first cylinder and a second cylinder, the first cylinder is installed on the outer side of the first support rod, the second cylinder is installed on the outer side of the second support rod, the push rod end of the first cylinder is fixedly connected to the first connecting plate, and the push rod end of the second cylinder is fixedly connected to the second connecting plate.
[0010] Furthermore, the loading platform is fixedly connected to the workbench via a connecting rod, and a step is provided on the upper portion of the loading platform for inserting the bottle mouth of the bottle blank.
[0011] Furthermore, the air inlet hole is a through hole structure, and the diameter of the air inlet hole is larger than the outer diameter of the stretch rod.
[0012] Furthermore, a valve is installed at one end of the stretching rod close to the second driving device.
[0013] Furthermore, the number of the air outlet holes is several and they are arranged at equal intervals around the circumference.
[0014] Furthermore, the second driving device adopts a lifting cylinder.
[0015] The beneficial effects of the utility model are:
[0016] Compared with the prior art, the utility model is provided with a stretching rod and a loading platform. When the stretching rod rises and enters the interior of the bottle blank, high-pressure gas is input from the bottom of the air inlet hole. The high-pressure gas enters through the gap between the stretching rod and the air inlet hole, so that the high-pressure gas can enter the interior of the bottle blank, and the high-pressure gas can be kept in the interior of the bottle blank for several seconds, and then discharged through the stretching rod. This process forms gas convection, which greatly enhances the cooling and shaping effect of the bottle blank, so that the bottle taken out after forming can reach a better shaping state, avoiding the problem of "deflation" after the bottle is taken out, resulting in high defective rate or poor quality, etc.; after solving this problem, the temperature resistance of the bottle made of PET material can reach 85℃-95℃, thereby greatly improving the use effect of the bottle and effectively expanding its use range, and it is more practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the utility model;
[0018] Figure 2 It is a schematic diagram of the stretching rod of the utility model.
[0019] In the figure, 1. workbench; 2. mold; 3. first driving device; 4. stretching rod; 5. second driving device; 6. loading platform; 7. bottle blank; 8. air inlet; 9. air outlet; 10. first mold; 11. second mold; 12. first support rod; 13. second support rod; 14. sliding rod; 15. first connecting plate; 16. second connecting plate; 17. first cylinder; 18. second cylinder; 19. connecting rod; 20. valve. DETAILED DESCRIPTION
[0020] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings:
[0021] like Figure 1-2 As shown,
[0022] A hot-fill bottle forming device comprises a workbench 1, a mold 2, a first driving device 3 driving the mold 2 to close the mold, a stretching rod 4, a second driving device 5 driving the stretching rod 4 to move, and a loading platform 6; the second driving device 5 is fixedly connected to the workbench 1, the moving end of the second driving device 5 is connected to the stretching rod 4, the loading platform 6 is arranged above the stretching rod 4, the loading platform 6 is used to place a bottle blank 7, the inside of the loading platform 6 is provided with an air inlet 8 for passing the stretching rod 4, and the surface of the stretching rod 4 is provided with an air outlet 9; the first driving device 3 drives the mold 2 to close the mold and places the bottle blank 7 in the mold cavity of the mold 2; in this embodiment In the process, when the second driving device 5 drives the stretching rod 4 to rise and enter the interior of the bottle blank 7, high-pressure gas is input from the bottom of the air inlet 8 (input at the end close to the workbench 1), and the high-pressure gas enters through the gap between the stretching rod 4 and the air inlet 8, so that the high-pressure gas can enter the interior of the bottle blank 7, and the high-pressure gas can be kept in the bottle blank 7 for several seconds, and then discharged through the stretching rod 4. This process forms gas convection, thereby greatly enhancing the cooling and shaping effect of the bottle blank 7; for example: the high-pressure gas is controlled to be input for eight seconds, and is kept in the bottle blank 7 for five seconds. At this time, the valve 20 on the stretching rod 4 can be opened, and the gas is discharged for three seconds, thereby forming gas convection circulation;
[0023] It should be noted that the input of high-pressure gas can be controlled by an external air intake pump and an air intake valve, and the air intake pipe end connected thereto can enter the interior (inner bottom) of the air intake hole 8 .
[0024] As a preferred embodiment; the mold 2 includes a first mold 10 and a second mold 11, and the workbench 1 is respectively provided with a first support rod 12 and a second support rod 13, a sliding rod 14 is fixedly connected between the first support rod 12 and the second support rod 13, the first mold 10 is slidably connected to the sliding rod 14 through a first connecting plate 15, and the second mold 11 is slidably connected to the sliding rod 14 through a second connecting plate 16; it can be understood that under the push of the first driving device 3, the first mold 10 and the second mold 11 can be closed, and at the same time, the sliding closing of the mold by the sliding rod 14 can improve the stability and precision of the closing.
[0025] As a preferred embodiment, the first driving device 3 includes a first cylinder 17 and a second cylinder 18, wherein the first cylinder 17 is mounted on the outer side of the first support rod 12, and the second cylinder 18 is mounted on the outer side of the second support rod 13. The push rod end of the first cylinder 17 is fixedly connected to the first connecting plate 15, and the push rod end of the second cylinder 18 is fixedly connected to the second connecting plate 16. By using the first cylinder 17 and the second cylinder 18, the first mold 10 and the second mold 11 can be effectively coordinated to move and close the mold.
[0026] As a preferred embodiment; the loading platform 6 is fixedly connected to the workbench 1 by a connecting rod 19, and a step is provided on the upper portion of the loading platform 6 for inserting the bottle mouth of the bottle blank 7; it can be understood that when the bottle blank 7 is installed, its bottle mouth is inserted into the upper step of the loading platform 6.
[0027] As a preferred embodiment, the air inlet hole 8 is a through hole structure, and the diameter of the air inlet hole 8 is larger than the outer diameter of the stretching rod 4. The purpose of this design is to ensure that after the stretching rod 4 is inserted, there is a gap between the air inlet hole 8 and the stretching rod 4 to facilitate the entry of high-pressure gas.
[0028] As a preferred embodiment, a valve 20 is installed at one end of the stretching rod 4 close to the second driving device 5; by providing the valve 20, the time of gas outlet can be effectively controlled, so that the high-pressure gas can stay inside the bottle blank 7 to maintain pressure, thereby ensuring the molding quality of the bottle blank 7.
[0029] As a preferred embodiment; the number of the air outlet holes 9 is several, and they are arranged at equal intervals around the circumference; it can be understood that the air outlet holes 9 are arranged in several rows around the circumference on the outside of the stretching rod 4, and the air outlet holes 9 in each row are arranged at equal intervals. The advantage of this design is that it can form better gas circulation and improve the effect of gas convection.
[0030] As a preferred embodiment, the second driving device 5 adopts a lifting cylinder.
[0031] The working principle of the utility model is as follows: the preform 7 is a semi-finished product. Before the preform 7 is blow-molded, the preform 7 has been heated by infrared rays and has reached a state where the bottle can be blown; during the blow-molding process, the preform 7 is first placed on the stage 6, then the first mold 10 and the second mold 11 are molded together, and the mold 2 is heated to 110-120 degrees Celsius, then the second driving device 5 is started to drive the stretching rod 4 to rise and enter the interior of the preform 7 (through the air inlet 8), then high-pressure gas is input and enters from the bottom of the air inlet 8 (enters through the gap between the air inlet 8 and the stretching rod 4), the input high-pressure gas time is eight seconds, and the gas is kept inside the preform 7 for five seconds, and the valve 20 is opened at five seconds, and the gas is discharged through the stretching rod 4 (the discharge time is three seconds, and the total duration is eight seconds);
[0032] It is worth mentioning that, during the pressure-maintaining process, part of the gas also enters the interior of the stretching rod 4. Since the valve 20 has not been opened, the gas will not be discharged. The gas inside the stretching rod 4 and the gas inside the bottle blank 7 maintain the pressure on the bottle blank 7, so that the bottle blank 7 is blown to fit the mold cavity of the mold 2. At the same time, the stretching rod 4 also has an auxiliary positioning function. In this process, since the temperature of the mold 2 is 110-120 degrees Celsius and the cooling effect of gas convection is good, not only the outer wall of the bottle body can be effectively crystallized, but also the outer wall of the bottle body is crystallized to partially white, that is, a qualified bottle, and its shaping effect is better.
[0033] It should be pointed out that the main problems in the prior art are: due to the increase in the temperature of the blow molding mold (the cooling process is not effective), the bottle taken out after molding has not reached a completely fixed state, that is, there is still residual temperature on the bottle, resulting in the bottle being "deflated" and causing problems such as a high defective rate or poor quality;
[0034] Therefore, through the improvement of the present application, the high-pressure gas can enter the interior of the bottle blank 7, and the high-pressure gas can be maintained in the bottle blank 7 for several seconds, and then discharged through the stretching rod 4. This process forms gas convection, which greatly enhances the cooling and shaping effect of the bottle blank 7, so that the bottle taken out after forming can reach a better shaping state, avoiding the situation that the bottle becomes "deflated" after being taken out, resulting in high defective rate or poor quality, etc.; after solving this problem, the temperature resistance of the bottle made of PET material can reach 85℃-95℃, thereby greatly improving the use effect of the bottle and effectively expanding its scope of use.
[0035] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.
Claims
1. A hot-fill bottle forming device, comprising a workbench, a mold, a first driving device for driving the mold to close the mold, a stretching rod, a second driving device for driving the stretching rod to move, and a loading platform; characterized in that: The second driving device is fixedly connected to the workbench, the moving end of the second driving device is connected to the stretching rod, the loading platform is arranged above the stretching rod, the loading platform is used to place the bottle blank, the inside of the loading platform is provided with an air inlet hole for passing the stretching rod, and the surface of the stretching rod is provided with an air outlet hole; The first driving device drives the mold to close the mold and places the bottle blank inside the mold cavity of the mold.
2. A hot filling bottle forming device according to claim 1, characterized in that: The mold includes a first mold and a second mold, and a first support rod and a second support rod are respectively arranged on the workbench, a sliding rod is fixedly connected between the first support rod and the second support rod, the first mold is slidably connected to the sliding rod through a first connecting plate, and the second mold is slidably connected to the sliding rod through a second connecting plate.
3. A hot filling bottle forming device according to claim 2, characterized in that: The first driving device includes a first cylinder and a second cylinder, the first cylinder is installed on the outer side of the first support rod, the second cylinder is installed on the outer side of the second support rod, the push rod end of the first cylinder is fixedly connected to the first connecting plate, and the push rod end of the second cylinder is fixedly connected to the second connecting plate.
4. A hot filling bottle forming device according to claim 3, characterized in that: The loading platform is fixedly connected to the workbench through a connecting rod, and a step is arranged on the upper part of the loading platform for inserting the bottle mouth of the bottle blank.
5. A hot filling bottle forming device according to claim 4, characterized in that: The air inlet hole is a through hole structure, and the diameter of the air inlet hole is larger than the outer diameter of the stretch rod.
6. A hot filling bottle forming device according to claim 5, characterized in that: A valve is installed at one end of the stretching rod close to the second driving device.
7. A hot filling bottle forming device according to claim 6, characterized in that: The number of the air outlet holes is several and they are arranged at equal intervals around the circumference.
8. A hot filling bottle forming device according to claim 7, characterized in that: The second driving device adopts a lifting cylinder.