Heat insulation device for bottle mould of bottle blowing machine

Abstract

The utility model relates to bottle blowing equipment technical field discloses a kind of bottle blowing machine hot bottle mould heat insulation device, including two groups of mould assembly and first locking structure, and each group of mould assembly includes mould hanger, heat insulation mould cover, hot bottle mould and second locking structure;Two groups of mould assembly can be mutually buckled so that two hot bottle moulds are formed into mould cavity, and the two mould hangers of two groups of mould assembly are locked by first locking structure;Mould hanger, heat insulation mould cover and hot bottle mould are coaxially arranged, and heat insulation mould cover is located between hot bottle mould and mould hanger, and heat insulation mould cover includes mould cover body and heat insulation structure, and mould cover body is provided with heat insulation structure at least one side along its thickness direction, and mould hanger, mould cover body and hot bottle mould are locked by second locking structure.The heat insulation mould cover in the bottle blowing machine hot bottle mould heat insulation device of the utility model can reduce the heat transfer of hot bottle mould to other components, and as far as possible avoid other components to be heated to produce thermal expansion effect phenomenon.

Description

Technical Field

[0001] This utility model relates to the technical field of blow molding equipment, and in particular to a heat insulation device for a blow molding machine hot bottle mold. Background Technology

[0002] Blow molding machines are used in hot filling production to manufacture high-temperature resistant PET (Polyethylene Terephthalate) bottles. The method involves heating the mold electrically or with liquid, and then using other processes to improve the heat resistance, crystallinity, and stability of the bottle body to meet the requirements for filling high-temperature liquids (such as tea and juice).

[0003] However, during the production process, the heat from heating the hot bottle mold is transferred to the intermediate mold sleeve in contact with the mold, and then gradually to other components, causing thermal expansion in these components. Although gaps are reserved in the design, when producing various hot bottle products, the temperature requirements of the blow molding process vary, which can easily cause other rotating or plug-in components to jam or have excessive gaps. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a heat insulation device for hot bottle molds in blow molding machines, which can reduce the heat transfer of hot bottle molds to other components and avoid the thermal expansion effect of other components as much as possible.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A heat insulation device for hot bottle molds in a blow molding machine is provided, comprising two sets of mold assemblies and a first locking structure. Each set of mold assemblies includes a mold bracket, a heat insulation sleeve, a hot bottle mold, and a second locking structure. The two sets of mold assemblies can be interlocked to form a mold cavity by closing the two hot bottle molds. The two mold brackets of the two sets of mold assemblies are locked together by the first locking structure. The mold bracket, the heat insulation sleeve, and the hot bottle mold are coaxially arranged, and the heat insulation sleeve is located between the hot bottle mold and the mold bracket. The heat insulation sleeve includes a sleeve body and a heat insulation structure. The heat insulation structure is provided on at least one side of the sleeve body along its thickness direction. The mold bracket, the sleeve body, and the hot bottle mold are locked together by the second locking structure.

[0007] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the heat insulation structure is disposed on the side of the mold sleeve facing the hot bottle mold.

[0008] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the heat insulation structure includes a heat insulation film, which is fixed to the side of the mold body facing the hot bottle mold.

[0009] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the heat insulation structure further includes multiple heat insulation pads. The heat insulation film is provided with multiple clearance holes that correspond one-to-one with the heat insulation pads along its thickness direction. The heat insulation pads are installed on the mold body and pass through the clearance holes. The heat insulation pads protrude from the side of the heat insulation film facing the hot bottle mold.

[0010] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the mold sleeve body has multiple mounting slots on the side facing the heat insulation film that correspond one-to-one with the heat insulation pads, and the heat insulation pads are fixed in the mounting slots by screws.

[0011] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the mold body is provided with a heat dissipation channel for the circulation of cooling medium, and a first connector and a second connector communicating with the heat dissipation channel are installed at intervals at the lower end of the mold body.

[0012] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the heat dissipation channel includes multiple first heat dissipation channels, multiple second heat dissipation channels, and multiple third heat dissipation channels. The length of the first heat dissipation channel extends vertically, the length of the second heat dissipation channel extends horizontally, and the second heat dissipation channel is adjacent to the upper end of the mold body. The length of the third heat dissipation channel extends horizontally, and the third heat dissipation channel is adjacent to the lower end of the mold body. The second heat dissipation channel and the third heat dissipation channel are partially staggered horizontally. Adjacent first heat dissipation channels are connected to each other through the second heat dissipation channel or the third heat dissipation channel to form the heat dissipation channel. Among the two third heat dissipation channels at the two circumferential ends adjacent to the mold body, the first connector is directly opposite to and connected to one of the third heat dissipation channels, and the second connector is directly opposite to and connected to the other third heat dissipation channel.

[0013] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the mold sleeve body includes a mold sleeve body, a cover plate, a sealing plate, a first fastener, and a second fastener. The upper end of the mold sleeve body has multiple first grooves along its circumference. The cover plate is fixed to the upper end of the mold sleeve body by the first fasteners to seal the openings of the first grooves, forming a second heat dissipation channel. The lower end of the mold sleeve body has multiple second grooves along its circumference. The sealing plate is fixed to the lower end of the mold sleeve body by the second fasteners to seal the openings of the second grooves, forming a third heat dissipation channel. The first heat dissipation channel is located within the mold sleeve body and penetrates the bottoms of the first and second grooves. The lower surface of the sealing plate, near its two circumferential ends, has a connecting hole communicating with the corresponding second groove. The first connector and the second connector are installed at the lower end of the sealing plate and communicate with one of the connecting holes respectively.

[0014] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the mold sleeve body further includes multiple first sealing rings and multiple second sealing rings. The upper end of the mold sleeve body has multiple first sealing grooves corresponding one-to-one with the first grooves. The first sealing rings are installed in the first sealing grooves and abut against the cover plate. The first grooves are located inside the rings of the first sealing rings. The lower end of the mold sleeve body has multiple second sealing grooves corresponding one-to-one with the second grooves. The second sealing rings are installed in the second sealing grooves and abut against the sealing plate. The second grooves are located inside the rings of the second sealing rings.

[0015] As a further embodiment of the heat insulation device for hot bottle molds in blow molding machines, the second locking structure includes a mold pressure plate, a third fastener, and a fourth fastener. The mold sleeve body has a mold pressure plate on each of its two circumferential end faces. Each mold pressure plate has multiple limiting protrusions protruding from the inner circumferential surface of the mold sleeve body. These limiting protrusions are spaced apart vertically. The outer circumferential surface of the hot bottle mold has slots corresponding to the limiting protrusions. The mold pressure plate is fixed to the mold sleeve body by the third fastener, and the limiting protrusions engage with the slots. The mold hanger is connected to the mold sleeve body by the fourth fastener.

[0016] Beneficial effects:

[0017] This invention provides a heat-insulating sleeve between the mold hanger and the hot bottle mold, and the mold hanger, sleeve body and hot bottle mold are locked together by a second locking structure. The heat generated by the hot bottle mold can be insulated by the heat-insulating structure of the heat-insulating sleeve, reducing the heat transfer of the hot bottle mold to other parts and minimizing the thermal expansion effect of other parts. This solves the problem of jamming or excessive gaps in other rotating or plug-in parts. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of the heat insulation device for the hot bottle mold of the blow molding machine according to an embodiment of the present utility model;

[0020] Figure 2 This is a side view of the mold assembly described in an embodiment of the present utility model;

[0021] Figure 3 This is a partially exploded view of the mold assembly described in an embodiment of the present invention;

[0022] Figure 4 This is an exploded view of the mold assembly described in an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the heat dissipation channel described in an embodiment of the present utility model;

[0024] Figure 6 for Figure 4 A magnified view of part A in the middle;

[0025] Figure 7 This is a schematic diagram of the structure of the mold body according to an embodiment of the present utility model;

[0026] Figure 8 for Figure 7 A magnified view of part B in the middle section.

[0027] In the picture:

[0028] 100. Mold hanger; 200. Insulating mold sleeve; 210. Mold sleeve body; 2101. Mounting groove; 2102. First heat dissipation channel; 211. Mold sleeve body; 2111. First groove; 2112. Second groove; 2113. First sealing groove; 2114. Second sealing groove; 212. Cover plate; 213. Sealing plate; 2131. Connecting hole; 214. First fastener; 215. Second fastener; 216. First sealing ring; 217. Second sealing ring; 220. Insulating film; 2201. Clearance hole; 230. Insulating pad; 240. First connector; 250. Second connector; 300. Hot water bottle mold; 3001. Slot; 400. Second locking structure; 410. Mold pressure plate; 411. Limiting protrusion; 420. Third fastener; 430. Fourth fastener. Detailed Implementation

[0029] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0030] 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.

[0031] 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.

[0032] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationships shown in the accompanying drawings. They are used solely for ease of description and simplification of operation, and do not indicate or imply that the device or component 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. Furthermore, the terms "first," "second," etc., are merely used for distinction in description and have no special meaning.

[0033] like Figures 1 to 3As shown, the hot bottle mold insulation device of the blow molding machine in this embodiment includes two sets of mold assemblies and a first locking structure (not shown in the figure). Each set of mold assemblies includes a mold hanger 100, a heat insulation mold sleeve 200, a hot bottle mold 300, and a second locking structure 400. The two sets of mold assemblies can be interlocked to close the two hot bottle molds 300 to form a mold cavity. The two mold hangers 100 of the two sets of mold assemblies are locked by the first locking structure. The mold hanger 100, the heat insulation mold sleeve 200 and the hot bottle mold 300 are coaxially arranged, and the heat insulation mold sleeve 200 is located between the hot bottle mold 300 and the mold hanger 100. The heat insulation mold sleeve 200 includes a mold sleeve body 210 and a heat insulation structure. The mold sleeve body 210 is provided with a heat insulation structure on at least one side along its thickness direction. The mold hanger 100, the mold sleeve body 210 and the hot bottle mold 300 are locked by the second locking structure 400.

[0034] In this embodiment, the two mold hangers 100 of the two sets of mold components are locked by the first locking structure to ensure the overall rigidity when the mold is closed; the mold hanger 100 serves as the main load-bearing body to support the entire mold set; by setting a heat insulation sleeve 200 between the mold hanger 100 and the hot bottle mold 300, and by locking the mold hanger 100, the sleeve body 210 and the hot bottle mold 300 by the second locking structure 400, the heat generated by the hot bottle mold 300 can be insulated by the heat insulation structure of the heat insulation sleeve 200, reducing the heat transfer of the hot bottle mold 300 to other components, and avoiding the thermal expansion effect of other components as much as possible, so as to solve the problem of jamming or excessive gap of other rotating or plugging components.

[0035] Optionally, the heat insulation structure of this embodiment can be set on the side of the mold body 210 facing the hot bottle mold 300, or it can be set on the side of the mold body 210 away from the hot bottle mold 300, or the heat insulation structure can be rolled on both sides of the mold body 210.

[0036] Furthermore, the heat insulation structure is disposed on the side of the mold sleeve 210 facing the hot bottle mold 300. In this embodiment, by placing the heat insulation structure on the side of the mold sleeve 210 facing the hot bottle mold 300, heat transfer to the mold sleeve 210 can be reduced. Since the mold sleeve 210 is adjacent to the mold hanger 100, heat transfer to the mold hanger 100 can also be reduced, thus reducing the risk of thermal deformation of the mold hanger 100 and other components, and extending the overall service life of the equipment. Compared to placing heat insulation structures on both sides of the mold sleeve 210, this embodiment, by placing the heat insulation structure on the side of the mold sleeve 210 facing the hot bottle mold 300, ensures the heat insulation effect of the heat-insulating mold sleeve 200 while reducing its production cost.

[0037] Furthermore, the heat insulation structure includes a heat insulation film 220, which is fixed to the side of the mold body 210 facing the hot bottle mold 300.

[0038] In this embodiment, the heat insulation film 220 is fixed on the side of the mold body 210 facing the hot bottle mold 300, resulting in good heat insulation effect.

[0039] Furthermore, such as Figure 3 and Figure 4 As shown, the heat insulation structure also includes multiple heat insulation pads 230. The heat insulation film 220 is provided with multiple clearance holes 2201 that correspond one-to-one with the heat insulation pads 230 along its thickness direction. The heat insulation pads 230 are installed on the mold body 210 and pass through the clearance holes 2201. The heat insulation pads 230 protrude from the side of the heat insulation film 220 facing the hot bottle mold 300.

[0040] By setting the heat insulation pad 230, the heat insulation film 220 can be prevented from directly contacting the hot bottle mold 300, so that a heat insulation cavity is formed between the hot bottle mold 300 and the heat insulation film 220. The heat insulation cavity can reduce the heat transfer efficiency, and the heat insulation pad 230 has the same heat insulation function as the heat insulation film 220.

[0041] For example, the heat insulation pads 230 are arranged in a matrix and fixed on the side of the mold body 210 facing the hot bottle mold 300.

[0042] In order to improve the installation stability of the heat insulation pad 230, in this embodiment, multiple mounting grooves 2101 corresponding to the heat insulation pad 230 are opened on the side of the mold body 210 facing the heat insulation film 220, and the heat insulation pad 230 is fixed in the mounting groove 2101 by screws.

[0043] Understandably, in order for the heat insulation pad 230 to protrude from the heat insulation film 220, the depth of the mounting groove 2101 must be less than the thickness of the heat insulation pad 230. The mounting groove 2101 serves to position the heat insulation pad 230 and provides some support for it. Specifically, the heat insulation pad 230 has two through holes, and two screws can pass through one of the through holes and be screwed into the mold body 210 to fix it, thereby stably fixing the heat insulation pad 230 in the mounting groove 2101.

[0044] Furthermore, the mold body 210 is provided with a heat dissipation channel for the circulation of the cooling medium, and a first connector 240 and a second connector 250 communicating with the heat dissipation channel are installed at intervals at the lower end of the mold body 210. The cooling medium can be water or other cold sources.

[0045] In this design, one of the first connector 240 and the second connector 250 can serve as an inlet for the refrigerant, and the other as an outlet for the refrigerant. Taking the first connector 240 as the inlet and the second connector 250 as the outlet as an example, the first connector 240 is connected to the second connector 250 via an external connecting pipe. A reflux pump is installed on the connecting pipe. The refrigerant in the connecting pipe undergoes heat exchange through a heat exchanger and then flows back to the second connector 250 under the action of the reflux pump, entering the heat dissipation channel of the mold body 210 to dissipate heat from the mold body 210. By rapidly transferring the heat from the mold body 210, the heat insulation effect of the insulation film 220 is further improved.

[0046] In this embodiment, the heat dissipation channel includes multiple first heat dissipation channels 2102, multiple second heat dissipation channels, and multiple third heat dissipation channels. The length of the first heat dissipation channel 2102 extends vertically, the length of the second heat dissipation channel extends horizontally, and the second heat dissipation channel is adjacent to the upper end of the mold body 210. The length of the third heat dissipation channel extends horizontally, and the third heat dissipation channel is adjacent to the lower end of the mold body 210. The second and third heat dissipation channels are partially staggered in the horizontal direction. Adjacent first heat dissipation channels 2102 are connected to each other through the second or third heat dissipation channels to form a heat dissipation channel. Among the two third heat dissipation channels adjacent to the two ends of the circumferential direction of the mold body 210, the first connector 240 is directly opposite to and connected to one of the third heat dissipation channels, and the second connector 250 is directly opposite to and connected to the other third heat dissipation channel.

[0047] In this embodiment, as Figure 5 As shown, the length of the first heat dissipation channel 2102 extends vertically, while the lengths of the second and third heat dissipation channels extend horizontally. Adjacent first heat dissipation channels 2102 are connected through the second or third heat dissipation channel to form a heat dissipation channel with a meandering structure. This heat dissipation channel has a relatively long path and provides good heat dissipation for the mold body 210.

[0048] Furthermore, such as Figure 4 , Figures 6 to 8As shown, the mold body 210 includes a mold body 211, a cover plate 212, a sealing plate 213, a first fastener 214, and a second fastener 215. The upper end of the mold body 211 has multiple first grooves 2111 along its circumference. The cover plate 212 is fixed to the upper end of the mold body 211 by the first fasteners 214 to seal the openings of the first grooves 2111, forming a second heat dissipation channel. The lower end of the mold body 211 has multiple second grooves 2112 along its circumference. The sealing plate 213 is fixed by the second fasteners 215. A third heat dissipation channel is formed by sealing the opening of the second groove 2112 at the lower end of the mold body 211; the first heat dissipation channel 2102 is located inside the mold body 211 and passes through the bottom of the first groove 2111 and the second groove 2112; a connecting hole 2131 communicating with the corresponding second groove 2112 is opened on the lower surface of the sealing plate 213 and near its two circumferential ends; the first connector 240 and the second connector 250 are installed at the lower end of the sealing plate 213 and communicate with one of the connecting holes 2131 respectively.

[0049] In this embodiment, a first groove 2111 is formed at the upper end of the mold body 211 and sealed by a cover plate 212 to form a first heat dissipation channel 2102, and a second groove 2112 is formed at the lower end of the mold body 211 and sealed by a sealing plate 213 to form a second heat dissipation channel. The first heat dissipation channel 2102 penetrates the mold body 211 in the vertical direction and communicates with the corresponding first groove 2111 and second groove 2112. The heat dissipation channel forming process of this structure is simple.

[0050] In this embodiment, both the first fastener 214 and the second fastener 215 include multiple screws, which will not be described in detail here.

[0051] To improve the sealing effect of the heat dissipation channel, this embodiment performs sealing treatment between the upper end face of the cover plate 212 and the mold body 211, and between the sealing plate 213 and the lower end face of the mold body 211. For example... Figures 4 to 8As shown, the mold body 210 also includes a plurality of first sealing rings 216 and a plurality of second sealing rings 217. The upper end of the mold body 211 is provided with a plurality of first sealing grooves 2113 corresponding one-to-one with the first grooves 2111. The first sealing rings 216 are installed in the first sealing grooves 2113 and abut against the cover plate 212. The first grooves 2111 are located inside the rings of the first sealing rings 216. The lower end of the mold body 211 is provided with a plurality of second sealing grooves 2114 corresponding one-to-one with the second grooves 2112. The second sealing rings 217 are installed in the second sealing grooves 2114 and abut against the cover plate 213. The second grooves 2112 are located inside the rings of the second sealing rings 217. The first sealing ring 216 is disposed in the first sealing groove 2113, and the first sealing ring 216 protrudes from the upper end face of the mold body 211. After the cover plate 212 is fixed to the upper end face of the mold body 211 by the first fastener 214, the first sealing ring 216 can abut against the lower surface of the cover plate 212 to ensure good sealing between the cover plate 212 and the mold body 211. The second sealing ring 217 is disposed in the second sealing groove 2114, and the second sealing ring 217 protrudes from the lower end face of the mold body 211. After the sealing plate 213 is fixed to the lower end face of the mold body 211 by the second fastener 215, the second sealing ring 217 can abut against the upper surface of the sealing plate 213 to ensure good sealing between the sealing plate 213 and the mold body 211.

[0052] Of course, to further improve the sealing performance, this embodiment can also provide a third sealing groove corresponding to the first sealing groove 2113 on the lower end face of the cover plate 212, and a fourth sealing groove corresponding to the second sealing groove 2114 on the upper end face of the sealing plate 213 (not shown in the figure); when the cover plate 212 is fixed to the upper end face of the mold body 211 by the first fastener 214, the first sealing ring 216 abuts against the bottom of the first sealing groove 2113 and the third sealing groove respectively; when the sealing plate 213 is fixed to the lower end face of the mold body 211 by the second fastener 215, the second sealing ring 217 abuts against the bottom of the second sealing groove 2114 and the fourth sealing groove respectively.

[0053] In this embodiment, the second locking structure 400 includes a mold pressure plate 410, a third fastener 420, and a fourth fastener 430. The mold sleeve body 210 is provided with a mold pressure plate 410 on each of its two circumferential end faces. The mold pressure plate 410 has a plurality of limiting protrusions 411 protruding from the inner circumferential surface of the mold sleeve body 210. The plurality of limiting protrusions 411 are spaced apart in the vertical direction. The outer circumferential surface of the hot bottle mold 300 is provided with a slot 3001 corresponding to the limiting protrusions 411. The mold pressure plate 410 is fixed to the mold sleeve body 210 by the third fastener 420. The limiting protrusions 411 are engaged with the slots 3001. The mold hanger 100 is connected to the mold sleeve body 210 by the fourth fastener 430.

[0054] During assembly, the limiting protrusion 411 of the mold plate 410 is inserted into the slot 3001 on the hot bottle mold 300, and the mold plate 410 is then fixed to the mold sleeve body 210 by the third fastener 420, so that the hot bottle mold 300 and the mold sleeve body 210 are fixedly connected; while the mold bracket 100 is connected to the mold sleeve body 210 by the fourth fastener 430, thereby realizing the assembly of the mold bracket 100, the heat insulation mold sleeve 200 and the hot bottle mold 300.

[0055] The third fastener 420 is a screw.

[0056] For example, the fourth fastener 430 is prior art, and its structure is the same as that of the elastic reset device disclosed in patent CN101254645A, which will not be described in detail here.

[0057] The connection method between the two mold hangers 100 of the two sets of mold components in this embodiment (connected through the first locking structure) is also existing technology, and will not be described in detail here.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A heat insulation device for a hot bottle mold in a blow molding machine, characterized in that, The device includes two sets of mold assemblies and a first locking structure. Each set of mold assemblies includes a mold bracket, a heat insulation sleeve, a hot bottle mold, and a second locking structure. The two sets of mold assemblies can be interlocked to form a mold cavity by closing the two hot bottle molds. The two mold brackets of the two sets of mold assemblies are locked together by the first locking structure. The mold bracket, the heat insulation sleeve, and the hot bottle mold are coaxially arranged, and the heat insulation sleeve is located between the hot bottle mold and the mold bracket. The heat insulation sleeve includes a sleeve body and a heat insulation structure. The heat insulation structure is provided on at least one side of the sleeve body along its thickness direction. The mold bracket, the sleeve body, and the hot bottle mold are locked together by the second locking structure.

2. The heat insulation device for hot bottle mold of blow molding machine according to claim 1, characterized in that, The heat insulation structure is disposed on the side of the mold body facing the thermos mold.

3. The heat insulation device for hot bottle mold of blow molding machine according to claim 2, characterized in that, The heat insulation structure includes a heat insulation film, which is fixed to the side of the mold body facing the hot bottle mold.

4. The heat insulation device for hot bottle mold of blow molding machine according to claim 3, characterized in that, The heat insulation structure also includes a plurality of heat insulation pads. The heat insulation film is provided with a plurality of clearance holes that correspond one-to-one with the heat insulation pads along its thickness direction. The heat insulation pads are installed on the mold body and pass through the clearance holes. The heat insulation pads protrude from the side of the heat insulation film facing the hot bottle mold.

5. The heat insulation device for hot bottle mold of blow molding machine according to claim 4, characterized in that, The mold body has multiple mounting slots on the side facing the heat insulation film, which correspond one-to-one with the heat insulation pads. The heat insulation pads are fixed in the mounting slots by screws.

6. The heat insulation device for hot bottle mold of blow molding machine according to claim 1, characterized in that, The mold body is provided with a heat dissipation channel for the circulation of the cooling medium, and a first connector and a second connector that communicate with the heat dissipation channel are installed at intervals at the lower end of the mold body.

7. The heat insulation device for hot bottle mold of blow molding machine according to claim 6, characterized in that, The heat dissipation channel includes multiple first heat dissipation channels, multiple second heat dissipation channels, and multiple third heat dissipation channels. The length of the first heat dissipation channel extends vertically, the length of the second heat dissipation channel extends horizontally, and the second heat dissipation channel is adjacent to the upper end of the mold body. The length of the third heat dissipation channel extends horizontally, and the third heat dissipation channel is adjacent to the lower end of the mold body. The second heat dissipation channel and the third heat dissipation channel are partially staggered in the horizontal direction. Adjacent first heat dissipation channels are connected to each other through the second heat dissipation channel or the third heat dissipation channel to form the heat dissipation channel. Among the two third heat dissipation channels at the two ends of the circumference of the mold body, the first connector is directly opposite to and connected to one of the third heat dissipation channels, and the second connector is directly opposite to and connected to the other third heat dissipation channel.

8. The heat insulation device for hot bottle mold of blow molding machine according to claim 7, characterized in that, The mold body includes a mold body, a cover plate, a sealing plate, a first fastener, and a second fastener. The upper end of the mold body has multiple first grooves along its circumference. The cover plate is fixed to the upper end of the mold body by the first fasteners to seal the openings of the first grooves, forming a second heat dissipation channel. The lower end of the mold body has multiple second grooves along its circumference. The sealing plate is fixed to the lower end of the mold body by the second fasteners to seal the openings of the second grooves, forming a third heat dissipation channel. The first heat dissipation channel is located within the mold body and penetrates the bottoms of the first and second grooves. The lower surface of the sealing plate, near its two circumferential ends, has a connecting hole communicating with the corresponding second groove. The first connector and the second connector are installed at the lower end of the sealing plate and communicate with one of the connecting holes, respectively.

9. The heat insulation device for hot bottle mold of blow molding machine according to claim 8, characterized in that, The mold body further includes multiple first sealing rings and multiple second sealing rings. The upper end of the mold body has multiple first sealing grooves that correspond one-to-one with the first grooves. The first sealing rings are installed in the first sealing grooves and abut against the cover plate. The first grooves are located inside the first sealing rings. The lower end of the mold body has multiple second sealing grooves that correspond one-to-one with the second grooves. The second sealing rings are installed in the second sealing grooves and abut against the cover plate. The second grooves are located inside the second sealing rings.

10. The heat insulation device for hot bottle mold of a blow molding machine according to any one of claims 1 to 9, characterized in that, The second locking structure includes a mold pressure plate, a third fastener, and a fourth fastener. The mold sleeve body has a mold pressure plate on each of its two circumferential end faces. Each mold pressure plate has multiple limiting protrusions protruding from the inner circumferential surface of the mold sleeve body. These limiting protrusions are spaced apart vertically. The outer circumferential surface of the hot bottle mold has slots corresponding to the limiting protrusions. The mold pressure plate is fixed to the mold sleeve body by the third fastener, and the limiting protrusions engage with the slots. The mold hanger is connected to the mold sleeve body by the fourth fastener.

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