Bottle blank opening temperature control device and bottle blowing machine

Abstract

The utility model belongs to the technical field of blow molding, and discloses a bottle blank opening temperature control device and a bottle blowing machine. According to the bottle blank opening temperature control device, at least two heat insulation pieces are clamped to form a containing space used for containing a bottle blank opening, a bottle opening supporting ring is located on one side of each heat insulation piece and located in the containing space, a bottle blank body and an infrared lamp tube are arranged on the other side of each heat insulation piece, each heat insulation piece is provided with a cooling water channel, and a water inlet of each heat insulation piece is communicated with a cooling water supply device; one or more of the at least two heat insulation pieces are further provided with cooling air ducts, cooling through holes right facing the bottle blank openings are formed in the inner side walls of the cooling air ducts, so that the cooling partition plate and the air cooling device are integrally arranged, the air cooling device is simplified, and the overall cooling cost of the bottle blank openings is reduced; the bottle blowing machine comprises the bottle blank opening temperature control device, a gas recovery device and a blow molding station, an air inlet of the gas recovery device is communicated with an exhaust port of the blow molding station, and an air outlet of the gas recovery device is communicated with an inlet of the cooling air duct.

Description

Technical Field

[0001] This utility model relates to the field of blow molding technology, and in particular to a preform mouth temperature control device and a blow molding machine. Background Technology

[0002] Hollow blow molding is a process for manufacturing hollow thermoplastic parts. It can inflate preforms to make plastic bottles. During the process of the infrared lamp holding the preform in the heating head, the heating temperature at the mouth of the preform must be properly controlled to ensure the processing quality of the bottle mouth of the blow-molded plastic bottle.

[0003] In existing technologies, cooling baffles are often used to block the heat emitted by the infrared lamps from being transferred to the preform opening, preventing the preform opening temperature from becoming too high. An external air cooler is also used to blow away excess heat from the preform opening, thereby controlling the temperature at the preform opening. However, external air cooling devices are complex in structure and expensive, resulting in a generally high cost for preform opening temperature control. Utility Model Content

[0004] The purpose of this utility model is to provide a preform neck temperature control device and a blow molding machine, which can integrate the cooling baffle and the air cooling device, thereby simplifying the structure of the preform neck temperature control device and reducing the temperature control cost of the preform neck.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] In a first aspect, a preform opening temperature control device is provided for controlling the heating temperature of the preform opening of a preform heated by an infrared lamp. The preform opening is fitted onto a heating head, and the preform also includes a preform opening support ring and a preform body arranged coaxially with the preform opening. The preform opening temperature control device includes:

[0007] A heat insulation component, comprising at least two heat insulation components sandwiched together to form a receiving space for accommodating the preform opening, wherein a bottle opening support ring is located on one side of the heat insulation component and within the receiving space, and the preform body and infrared lamp tube are located on the other side of the heat insulation component; the heat insulation component has a cooling water channel, which includes an inlet, a channel body, and an outlet; the inlet is connected to a cooling water supply device, and cooling water can flow into the channel body from the inlet and out from the outlet; the cooling water can exchange heat with the heat insulation component within the channel body; one or more of the at least two heat insulation components also have a cooling air duct, and cooling air can enter the cooling air duct from the inlet; the inner wall of the cooling air duct has a cooling through hole facing the preform opening;

[0008] Temperature detector, which can detect the heating temperature at the preform opening.

[0009] Preferably, the heat insulation component also has a support portion, which is directly opposite the bottle mouth support ring in the vertical direction, so that the bottle mouth support ring can overlap the support portion when the preform falls off the heating head.

[0010] Preferably, the heat insulation component has at least two parallel and spaced-apart cooling air ducts.

[0011] Preferably, the heat insulation component has at least two parallel cooling water channels that are spaced apart, and the two cooling water channels are independently arranged.

[0012] Preferably, the preform opening temperature control device also includes a water distribution component, which is fixed on the heat insulation component. The inlet of the water distribution component is connected to the cooling water supply device, and its outlet is connected to the water inlet.

[0013] Preferably, the preform opening temperature control device also includes a water collection component, which is fixed on the heat insulation component. The inlet of the water collection component is connected to the outlet, and its outlet is connected to the outside.

[0014] Preferably, the number of cooling air ducts and cooling water ducts are the same, with each cooling water duct corresponding to one cooling air duct, and the extension directions of the cooling water ducts and cooling air ducts are the same.

[0015] Preferably, at least two preforms are arranged at intervals in the horizontal direction, and the number of cooling through holes in a cooling duct is the same as the number of preforms, with each cooling through hole in a cooling duct corresponding to a preform opening.

[0016] Secondly, a blow molding machine is provided, including the aforementioned preform temperature control device, gas recovery device, and blow molding station, wherein the air inlet of the gas recovery device is connected to the exhaust outlet of the blow molding station, and the air outlet of the gas recovery device is connected to the inlet of the cooling air duct.

[0017] The beneficial effects of this utility model are:

[0018] This utility model discloses a preform neck temperature control device. At least two heat-insulating members are used to form a receiving space for accommodating the preform neck. A bottle neck support ring is located on one side of the heat-insulating members and within the receiving space. The preform body and infrared lamp are located on the other side of the heat-insulating members, thereby preventing the heat emitted by the infrared lamp from being transferred to the preform neck to ensure the processing quality of the bottle neck in blow-molded plastic bottles. A cooling water channel is provided through the heat-insulating members. The cooling water channel includes an inlet, a channel body, and an outlet. The inlet is connected to a cooling water supply device, allowing cooling water to flow into the channel body from the inlet and out from the outlet, thus preventing the heat emitted by the infrared lamp from being transferred to the preform neck. When the generated heat is transferred to the cooling baffle, the cooling water can exchange heat with the insulation components within the water channel body, dissipating the heat in a timely manner. One or more of the at least two insulation components also have cooling air ducts, through which cooling air can enter the cooling air duct from the inlet. Cooling through holes are opened on the inner side wall of the cooling air duct, facing the preform opening. When the temperature detector detects that the heating temperature at the preform opening is too high, cooling air can be directly blown onto the preform opening to control the heating temperature at the preform opening. The cooling baffle is integrated with the air-cooling device, simplifying the air-cooling device and thus reducing the overall cooling cost of the preform opening.

[0019] The blow molding machine of this utility model includes the preform mouth temperature control device, gas recovery device, and blow molding station mentioned above. The air inlet of the gas recovery device is connected to the exhaust port of the blow molding station, and the air outlet of the gas recovery device is connected to the inlet of the cooling air duct. This allows the high-temperature waste gas discharged from the exhaust port of the blow molding station to be recovered. When the high-temperature waste gas enters the cooling air duct, it undergoes heat exchange with the cooling water in the cooling water duct to reduce its temperature. This allows the cooled high-temperature waste gas to be used to purge the cold preform mouth, thereby controlling the heating temperature at the preform mouth and reducing the cooling gas supply cost of the preform mouth temperature control device. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the preform mouth temperature control device provided by this utility model;

[0021] Figure 2 This is a cross-sectional view of the preform temperature control device provided by this utility model.

[0022] In the picture:

[0023] 100. Bottle preform; 101. Bottle preform mouth; 102. Bottle mouth support ring; 103. Bottle preform body; 200. Heating head;

[0024] 1. Heat insulation component; 11. Cooling water channel; 12. Cooling air duct; 121. Cooling through hole; 13. Support component;

[0025] 2. Water distribution components; 3. Water collection components. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0030] Cooling baffles are used to block heat dissipated by infrared lamps from reaching the preform opening, preventing excessive heating at the opening. An external air cooler is installed to blow away excess heat from the preform opening, thus controlling the temperature. However, external air cooling devices are complex and costly, resulting in high overall costs for preform opening temperature control. Therefore, integrating the cooling baffles with the air cooling system is key to solving these technical problems. The following section will discuss... Figures 1 to 2 This invention provides a detailed description of the preform mouth temperature control device and blow molding machine provided by this utility model.

[0031] Figure 1This diagram illustrates the structure of the preform neck temperature control device provided in this embodiment. Figure 2 A cross-sectional view of the preform neck temperature control device provided in this embodiment is shown. Figures 1 to 2 As shown, the bottle preform opening temperature control device provided in this embodiment is used to control the heating temperature of the bottle preform opening 101 of the bottle preform 100 heated by an infrared lamp. The bottle preform opening 101 is sleeved on the heating head 200. The bottle preform 100 also includes a bottle opening support ring 102 and a bottle preform body 103 arranged coaxially with the bottle preform opening 101. The bottle preform opening temperature control device includes a heat insulation component 1 and a temperature detector. At least two heat insulation components 1 are sandwiched to form a receiving space for accommodating the bottle preform opening 101. The bottle opening support ring 102 is located on one side of the heat insulation component 1 and within the receiving space. The bottle preform body 103 and the infrared lamp are disposed on the other side of the heat insulation component 1. Component 1 has a cooling water channel 11, which includes an inlet, a channel body, and an outlet. The inlet is connected to a cooling water supply device, and cooling water can flow into the channel body from the inlet and out from the outlet. The cooling water can exchange heat with the heat insulation component 1 in the channel body. At least one or more of the two heat insulation components 1 also have a cooling air duct 12, and cooling air can enter the cooling air duct 12 from the inlet. The inner side wall of the cooling air duct 12 is provided with a cooling through hole 121 facing the preform opening 101. A temperature detector is fixedly connected to the heat insulation component 1 and can detect the heating temperature of the preform opening 101. It should be noted that in the prior art, infrared lamps are often used to irradiate the preform 100, and the heat emitted by the infrared lamps is used to heat the preform 100 in order to control the heating temperature of the preform 100. Although the heat insulation component 1 can absorb the heat emitted by the infrared lamps, if the heat absorbed by the heat insulation component 1 cannot be dissipated in time, the heat emitted by the infrared lamps will overflow from the cooling partition and be conducted to the preform opening 101, causing the heating temperature at the preform opening 101 to rise sharply. The type of temperature detector is not limited here. The temperature detector can be a thermometer or a thermistor. Any temperature measuring element that can detect the heating temperature of the preform opening 101 is within the protection scope of this embodiment, and will not be described in detail here.

[0032] In this embodiment, the preform neck temperature control device forms a receiving space for accommodating the preform neck 101 by clamping at least two heat insulation members 1. The neck support ring 102 is located on one side of the heat insulation member 1 and within the receiving space, while the preform body 103 and the infrared lamp are located on the other side of the heat insulation member. This prevents the heat emitted by the infrared lamp from being transferred to the preform neck 101, ensuring the neck processing quality of the blow-molded plastic bottle. A cooling water channel 11 is provided through the heat insulation member 1. The cooling water channel 11 includes an inlet, a channel body, and an outlet. The inlet is connected to a cooling water supply device, allowing cooling water to flow into the channel body from the inlet and out from the outlet, thereby preventing the heat emitted by the infrared lamp from being transferred to the preform neck 101. When the water is delivered to the cooling baffle, the cooling water can exchange heat with the heat insulation component 1 in the water channel body and dissipate the heat in time. One or more of the heat insulation components 1 also have a cooling air duct 12. Cooling air can enter the cooling air duct 12 from the inlet of the cooling air duct 12. The inner side wall of the cooling air duct 12 is provided with a cooling through hole 121 facing the preform opening 101. When the temperature detector detects that the heating temperature at the preform opening 101 is too high, the cooling air can be directly blown to the preform opening 101 to control the heating temperature at the preform opening 101. The cooling baffle and the air cooling device are integrated, simplifying the air cooling device and thus reducing the overall cooling cost of the preform opening 101.

[0033] Continue as Figures 1 to 2 As shown, the heat insulation component 1 also has a support portion 13, which is vertically aligned with the bottle mouth support ring 102. When the preform 100 falls off the heating head 200, the bottle mouth support ring 102 can overlap the support portion 13. Therefore, if the preform 100 accidentally falls off the heating head 200, the support portion 13 can prevent the preform 100 from falling further to the infrared lamp tube and being heated and melted, thus preventing the preform 100 from melting and sticking to the infrared lamp tube. Specifically, the support portion 13 is a flange, and the flanges of at least two heat insulation components 1 can jointly support the bottle mouth support ring 102. It should be noted that the number of heat insulation components 1 is not limited here; it can be two, three, four, or even more, as long as they can jointly support the bottle mouth support ring 102 to prevent the preform 100 from falling to the infrared lamp tube. Further details will not be provided here.

[0034] Continue as Figures 1 to 2 As shown, the heat insulation component 1 has at least two parallel and spaced-apart cooling water channels 11, with each channel 11 independently arranged. This increases the contact area between the cooling water and the heat insulation component 1 within the channel body, thereby improving the heat exchange efficiency between the cooling water and the heat insulation component 1 and enhancing its insulation effect. It should be noted that the number of cooling water channels 11 is not limited here; it can be two, three, four, or even more, as long as it improves the heat exchange efficiency between the cooling water and the heat insulation component 1. No specific number is required here.

[0035] In some embodiments, the heat insulation member 1 has at least two parallel and spaced cooling air ducts 12, which can increase the number of cooling air ducts 12 and indirectly increase the number of cooling through holes 121, thereby increasing the cooling effect of the cooling air blowing through the preform opening 101, and thus improving the overall temperature control effect of the preform opening temperature control device on the preform opening 101.

[0036] Continue as Figures 1 to 2 As shown, the preform temperature control device also includes a water distribution component 2, which is fixed to the heat insulation component 1. The inlet of the water distribution component 2 is connected to the cooling water supply device, and its outlet is connected to the inlet of the cooling water channel 11. This allows the cooling water supplied by the cooling water supply device to flow evenly to each cooling water channel 11 of the heat insulation component 1, thereby preventing insufficient water supply to a single cooling water channel 11 and causing local overheating of the heat insulation component 1, and preventing deformation of the heat insulation component 1 due to uneven heating. Specifically, the water distribution component 2 can be a water distribution pump. Any water distribution component that enables the cooling water supplied by the cooling water supply device to flow evenly to each cooling water channel 11 of the heat insulation component 1 is within the scope of protection of this embodiment, and will not be described in detail here.

[0037] Preferably, the preform opening temperature control device further includes a water collecting component 3, which is fixed to the heat insulation component 1. The inlet of the water collecting component 3 is connected to the outlet of the cooling water channel 11, and its outlet is connected to the outside. Thus, after the cooling water undergoes heat exchange with the heat insulation component 1 within the channel body, it flows to the water collecting component 3 and is then discharged. This eliminates the need for separate discharge pipes for each cooling water channel 11, simplifying the structure of the water-cooling device and reducing the water-cooling cost of the preform opening temperature control device. Specifically, the water collecting component 3 has one outlet and an number of inlets equal to the number of cooling water channels 11 in a single heat insulation component 1. The water collecting component 3 can collect the cooling water that has undergone heat exchange within the channel body and discharge it to the outside. The water collecting component 3 can be a water pump. Any water collecting component that allows the internal cooling water to undergo heat exchange with the heat insulation component 1 within the channel body and then flow to the water collecting component 3 for discharge is within the scope of this embodiment and will not be described in detail here.

[0038] In some embodiments, the number of cooling air ducts 12 and cooling water ducts 11 is the same, with each cooling water duct 11 corresponding to one cooling air duct 12. The cooling water ducts 11 and cooling air ducts 12 extend in the same direction, enabling heat exchange between the cooling air in the cooling air duct 12 and the cooling water in the cooling water duct 11. When the temperature of the cooling air in the cooling air duct 12 is lower than the temperature of the cooling water in the cooling water duct 11, heat exchange occurs, lowering the temperature of the cooling water and thus improving the heat insulation effect of the heat insulation component 1. Conversely, when the temperature of the cooling air in the cooling air duct 12 is higher than the temperature of the cooling water in the cooling water duct 11, heat exchange occurs, lowering the temperature of the cooling air and thus improving the air-cooling effect of the preform opening temperature control device. It should be noted that when both the temperature of the cooling air in the cooling air duct 12 and the temperature of the cooling water in the cooling air duct 12 are high, the preform opening temperature control device can no longer effectively control the heating temperature at the preform opening 101, requiring shutdown for maintenance.

[0039] Continue as Figures 1 to 2 As shown, blow molding machines often need to heat multiple preforms 100 simultaneously. The preform opening temperature control device actually needs to simultaneously control the heating temperature of the preform openings 101 of multiple preforms 100. To solve the above technical problem, at least two preforms 100 are arranged at intervals along the horizontal direction. The number of cooling through holes 121 in a cooling duct 12 is the same as the number of preforms 100. Each cooling through hole 121 in a cooling duct 12 corresponds to one preform opening 101, thereby enabling the preform opening temperature control device to simultaneously control the heating temperature of the preform openings 101 of multiple preforms 100.

[0040] This utility model also discloses a blow molding machine, including the preform mouth temperature control device, gas recovery device and blow molding station mentioned above. The air inlet of the gas recovery device is connected to the exhaust port of the blow molding station, and the air outlet of the gas recovery device is connected to the inlet of the cooling duct 12. This allows the high-temperature exhaust gas discharged from the exhaust port of the blow molding station to be recovered. When the high-temperature exhaust gas enters the cooling duct 12, it undergoes heat exchange with the cooling water in the cooling water channel 11 to reduce its temperature. This allows the cooled high-temperature exhaust gas to be used to purge the cold preform mouth 101, thereby controlling the heating temperature at the preform mouth 101 and reducing the cooling gas supply cost of the preform mouth temperature control device.

[0041] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A preform opening temperature control device for controlling the heating temperature of the preform opening (101) of a preform (100) heated by an infrared lamp, wherein the preform opening (101) of the preform (100) is sleeved on a heating head (200), and the preform (100) further includes a preform opening support ring (102) and a preform body (103) coaxially arranged with the preform opening (101) in sequence, characterized in that, The preform opening temperature control device includes: A heat insulation element (1), at least two of which are sandwiched to form a receiving space for accommodating the preform mouth (101), the preform support ring (102) is located on one side of the heat insulation element (1) and within the receiving space, the preform body (103) and the infrared lamp tube are disposed on the other side of the heat insulation element (1), the heat insulation element (1) has a cooling water channel (11), the cooling water channel (11) includes an inlet, a channel body and an outlet, the inlet is connected to a cooling water supply device, and the cooling water... Cooling water can flow into the water channel body from the inlet and out from the outlet. The cooling water can exchange heat with the heat insulation member (1) in the water channel body. At least one or more of the heat insulation members (1) also have a cooling air duct (12). Cooling air can enter the cooling air duct (12) from the inlet. The inner side wall of the cooling air duct (12) is provided with a cooling through hole (121) facing the bottle preform opening (101). A temperature detector capable of detecting the heating temperature of the preform opening (101).

2. The preform neck temperature control device according to claim 1, characterized in that, The heat insulation component (1) also has a support portion (13) which is directly opposite the bottle mouth support ring (102) in the vertical direction. When the preform (100) falls off the heating head (200), the bottle mouth support ring (102) can overlap the support portion (13).

3. The preform neck temperature control device according to claim 1, characterized in that, The heat insulation component (1) has at least two parallel and spaced-apart cooling air ducts (12).

4. The preform neck temperature control device according to claim 1, characterized in that, The heat insulation component (1) has at least two parallel and spaced cooling water channels (11), and at least two cooling water channels (11) are independently arranged.

5. The preform neck temperature control device according to claim 4, characterized in that, The preform temperature control device also includes a water distribution component (2), which is fixed on the heat insulation component (1). The inlet of the water distribution component (2) is connected to the cooling water supply device, and its outlet is connected to the water inlet.

6. The preform neck temperature control device according to claim 4, characterized in that, The preform temperature control device also includes a water collection component (3), which is fixed on the heat insulation component (1). The inlet of the water collection component (3) is connected to the outlet, and its outlet is connected to the outside.

7. The preform neck temperature control device according to claim 3 or 4, characterized in that, The number of cooling air ducts (12) and cooling water ducts (11) is the same. Each cooling water duct (11) corresponds to one cooling air duct (12). The extension directions of the cooling water ducts (11) and the cooling air ducts (12) are the same.

8. The preform neck temperature control device according to claim 7, characterized in that, At least two preforms (100) are arranged at intervals in the horizontal direction. The number of cooling through holes (121) in one cooling duct (12) is the same as the number of preforms (100). Each cooling through hole (121) in one cooling duct (12) corresponds to one preform opening (101).

9. A blow molding machine characterized in that, Includes the preform temperature control device, gas recovery device and blow molding station as described in any one of claims 1-8, wherein the air inlet of the gas recovery device is connected to the exhaust port of the blow molding station, and the air outlet of the gas recovery device is connected to the inlet of the cooling duct (12).

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