Injection-blow mold, injection-blow equipment and molding method for hollow double-layer bottles

Abstract

The present invention discloses an injection-blow mold, injection-blow equipment and molding method for a hollow double-layer bottle. The hollow double-layer bottle includes an inner bottle and an outer bottle cover formed in one piece. The injection-blow mold includes: a mounting platform, the mounting platform has a plurality of first upper molds; a lower mold group, the lower mold group includes a first lower mold and a second lower mold, the second lower mold is opposite to another first upper mold; a second upper mold; a driving member, the driving member is used to drive the mounting platform to move close to or away from the lower mold group along the axial direction of the mounting platform, and is also used to drive the second upper mold to move close to or away from the lower mold group and rotate around the central axis of the mounting platform. Therefore, when producing a hollow double-layer bottle, the inner bottle and the outer bottle cover formed in one piece are formed by injection molding and blow molding using an injection-blow mold, the number of connecting parts used to connect the inner bottle and the outer bottle is reduced, the difficulty of assembling the hollow double-layer bottle is reduced, thereby reducing the labor cost of producing the hollow double-layer bottle, and at the same time reducing the time of producing the hollow double-layer bottle.

Description

Technical Field

[0001] The invention relates to the field of container processing, in particular to an injection-blowing mold for a hollow double-layer bottle, an injection-blowing device for the hollow double-layer bottle, and a molding method for the hollow double-layer bottle. Background Art

[0002] In the related art, when manufacturing a hollow double-layer bottle, an outer bottle is placed on the outer side of the inner bottle, and the inner bottle and the outer bottle need to be produced independently. After the inner bottle is placed in the outer bottle, the inner bottle and the outer bottle are fixedly connected by connecting parts. There are many connecting parts for connecting the inner bottle and the outer bottle, which leads to a large amount of manpower cost when producing the hollow double-layer bottle. At the same time, the process of producing the hollow double-layer bottle is complicated, which further prolongs the processing time of the hollow double-layer. Summary of the invention

[0003] In order to reduce the labor cost and time of producing hollow double-layer bottles, the present application provides an injection blow mold for hollow double-layer bottles.

[0004] The present application further proposes an injection-blowing device for a hollow double-layer bottle.

[0005] The present application further proposes a method for forming a hollow double-layer bottle.

[0006] The present application provides an injection blow mold for a hollow double-layer bottle using the following technical solution:

[0007] 1. An injection-blow mold for a hollow double-layer bottle, the hollow double-layer bottle comprising an inner bottle and an outer bottle cover formed in one piece, the outer bottle cover surrounding the circumferential outer side of the inner bottle, the injection-blow mold for molding the outer bottle cover and the inner bottle, the injection-blow mold comprising: a mounting platform, the mounting platform having a plurality of first upper molds, the plurality of first upper molds being sequentially spaced apart along the circumferential direction of the mounting platform; a lower mold group, the lower mold group comprising a first lower mold and a second lower mold, the first lower mold and the second lower mold being spaced apart along the circumferential direction of the mounting platform, the first lower mold being provided with an injection flow channel, the first lower mold being opposite to one of the first upper molds, and the second lower mold being opposite to the other of the first upper molds; a second upper mold, the second upper mold being suitable for being clamped between the first upper mold and the first lower mold, and between the first upper mold and the second lower mold; a driving member, the driving member being used to drive the mounting platform to approach or move away from the axial direction of the mounting platform The second upper mold is used to move away from the lower mold group, and is also used to drive the second upper mold to move closer to or away from the lower mold group and rotate around the central axis of the mounting platform, so that the second upper mold is rotated to be arranged opposite to the first lower mold or the second lower mold; wherein, when the second upper mold is opposite to the first lower mold and stops and fits, the first upper mold, the second upper mold and the first lower mold jointly define an inner bottle injection molding gap and an outer bottle cover injection molding gap that are connected to each other, the outer bottle cover injection molding gap surrounds the circumferential outer side of the inner bottle injection molding gap, and the injection molding runner is connected to the inner bottle injection molding gap; when the second upper mold is opposite to the second lower mold and stops and fits, the first upper mold includes a blow needle, the blow needle extends into the second upper mold, the first upper mold, the second upper mold and the second lower mold jointly define a blow molding space and the outer bottle cover injection molding gap that are connected to each other, and the blow molding space is arranged opposite to a part of the bottom wall of the outer bottle cover formed in the outer bottle cover injection molding gap.

[0008] By adopting the above technical scheme, when producing hollow double-layer bottles, an inner bottle and an outer bottle cover are formed as an integral part by injection molding and blow molding using an injection blow mold. Compared with the prior art, the outer bottle cover can connect the inner bottle and the outer bottle, reducing the number of connecting parts used to connect the inner bottle and the outer bottle, reducing the difficulty of assembling the hollow double-layer bottle, thereby reducing the labor cost of producing the hollow double-layer bottle, and reducing the time of producing the hollow double-layer bottle.

[0009] Preferably, the first upper mold has a molding part for molding the inner bottle, and there are multiple second upper molds, and the multiple second upper molds are spaced apart in sequence along the circumferential direction of the mounting table. The multiple second upper molds are suitable for rotating around the central axis of the mounting table until they correspond to and are relatively arranged with the multiple first upper molds one by one, and each of the second upper molds defines an injection gap for the outer bottle cover with the first lower mold or the second lower mold.

[0010] By adopting the above technical solution, when the injection blow mold is injecting the inner bottle and the outer bottle cover, the driving member drives the first upper mold to rotate around the central axis of the mounting table to correspond to and be relatively arranged with the first lower mold, so that the first upper mold, the second upper mold and the first lower mold can cooperate to define the injection gap of the outer bottle cover. Further, when the injection blow mold is blow molding the inner bottle, the driving member drives the first upper mold to rotate around the central axis of the mounting table to correspond to and be relatively arranged with the second lower mold, so that the first upper mold, the second upper mold and the first lower mold can cooperate to define the injection gap of the outer bottle cover to fix the outer bottle cover.

[0011] Preferably, the molded part of the first upper mold opposite to the first lower mold is configured as an injection mold core, the injection mold core passes through the second upper mold and extends into the first lower mold, the outer peripheral wall of the injection mold core is spaced apart from the inner wall of the first lower mold to form the inner bottle injection gap; the molded part of the first upper mold opposite to the second lower mold is configured as the blow needle.

[0012] By adopting the above technical scheme, when the injection blow mold is injection-molding the inner bottle and the outer bottle cover, the first upper mold and the second upper mold are stopped, the injection mold core passes through the second lower mold, and the injection mold core extends into the first lower mold, so that the outer peripheral wall of the injection mold core, the second upper mold and the inner wall of the first lower mold cooperate to form the outer bottle cover injection gap and the inner bottle injection gap, and the material enters the outer bottle cover injection gap and the inner bottle injection gap through the injection molding flow channel of the first lower mold, so that the inner bottle and the outer bottle cover are integrally formed, and when the injection blow mold is blow-molding the inner bottle, the first upper mold and the first lower mold are opposite to each other and stop-molded, the blow needle passes through the first upper mold, and the blow needle extends into the second lower mold and the blow needle is opposite to the bottle mouth of the inner bottle, and the gas medium is passed into the inner bottle through the bottle mouth through the blow needle, so that the inner bottle is blow-molded.

[0013] Preferably, the end face of the second upper mold opposite to the first lower mold and the second lower mold is provided with a first positioning structure, the end face of the first lower mold opposite to the second upper mold, and / or the end face of the second lower mold opposite to the second upper mold is correspondingly provided with a second positioning structure, and the first positioning structure is positioned and matched with the second positioning structure.

[0014] By adopting the above technical scheme, when the second upper mold stops against the first lower mold, the first positioning mechanism and the second positioning mechanism are positioned and matched, so that the second upper mold can be accurately matched with the first lower mold, and the first lower mold group and the second upper mold are positioned by the first positioning structure and the second positioning structure, so that the shapes of the inner bottle and the outer bottle cover of each injection are consistent. Similarly, when the second upper mold stops against the second lower mold, the second positioning mechanism and the second positioning mechanism are positioned and matched, so that the second upper mold can be accurately matched with the first lower mold, and the second lower mold group and the second upper mold are positioned by the first positioning structure and the second positioning structure, so that the shapes of the inner bottle of each blow molding are consistent.

[0015] Preferably, one of the first positioning structure and the second positioning structure is constructed as a positioning protrusion and the other is constructed as a positioning recess, the positioning protrusion is arranged opposite to the positioning recess, and the positioning protrusion protrudes toward the positioning recess, and the positioning protrusion is suitable for extending into or moving out of the positioning recess.

[0016] By adopting the above technical solution, when the second upper mold cooperates with the first lower mold or the second lower mold, the positioning protrusion extends into the positioning recess, so that the first positioning structure and the second positioning structure can position the second upper mold and the first lower mold or the second lower mold, thereby improving the accuracy of the cooperation between the second upper mold and the first lower mold or the second lower mold.

[0017] Preferably, there are two second upper molds, and when the second upper mold is driven by the driving member to rotate around the central axis of the mounting table, one of the two second upper molds is arranged opposite to the first lower mold and the other is arranged opposite to the second lower mold.

[0018] By adopting the above technical solution and providing two second upper molds, the injection-blow mold can simultaneously inject and blow a plurality of inner bottles and outer bottle covers, thereby improving the production efficiency of the injection-blow mold.

[0019] Preferably, there are three second upper molds, and when the second upper molds are driven by the driving member to rotate around the central axis of the mounting table, one of the three second upper molds is arranged opposite to the first lower mold and another one is arranged opposite to the second lower mold.

[0020] By adopting the above technical solution and setting the number of the second upper molds to three, the injection-blow mold can simultaneously inject and blow a plurality of inner bottles and outer bottle covers, thereby further improving the production efficiency of the injection-blow mold.

[0021] The present application provides an injection-blowing device for a hollow double-layer bottle using the following technical solution:

[0022] An injection-blow molding device for a hollow double-layer bottle comprises: an injection-blow molding die, which is one of the above-mentioned injection-blow molding die for a hollow double-layer bottle; an injection molding machine, which has an injection molding nozzle, which is connected to the injection molding flow channel of the first lower mold of the injection-blow molding die so that the injection molding nozzle can inject molten plastic into the injection-blow molding die; and a blow molding machine, which has a pneumatic component, which is connected to the blow needle and is used to supply air to the blow needle.

[0023] By adopting the above technical scheme, when producing hollow double-layer bottles, molten plastic is injected into the injection-blow mold through an injection molding machine so that the outer bottle cover and the inner bottle can be integrally formed, and air is supplied to the blow needle through the blow molding machine so that the inner bottle is blow-molded. Compared with the prior art, the outer bottle cover produced by the injection-blow equipment can connect the inner bottle and the outer bottle, reducing the number of connecting parts for connecting the inner bottle and the outer bottle, reducing the difficulty of assembling the hollow double-layer bottle, thereby reducing the labor cost of producing the hollow double-layer bottle, and at the same time reducing the time of producing the hollow double-layer bottle.

[0024] The present application provides a method for forming a hollow double-layer bottle using the following technical solution:

[0025] A method for forming a hollow double-layer bottle, the method being applicable to the above-mentioned injection-blow molding device for a hollow double-layer bottle, the method being used for forming the inner bottle and the outer bottle cover, the method comprising: driving the second upper mold to be arranged opposite to the first lower mold, and driving the first upper mold, the second upper mold and the first lower mold to stop and cooperate in sequence; injecting molten plastic into the injection molding gap of the inner bottle and the injection molding gap of the outer bottle cover connected to the injection molding gap of the inner bottle, so that an inner bottle blank is formed in the injection molding gap of the inner bottle, and an outer bottle cover is formed in the injection molding gap of the outer bottle cover, wherein the inner bottle blank and the outer bottle cover are integrally formed; driving the mounting platform away from the first The first lower mold is driven, and the second upper mold is driven to drive the inner bottle blank and the outer bottle cover away from the first lower mold, so that the second upper mold is separated from the first upper mold and the first lower mold; the second upper mold is driven to drive the inner bottle blank and the outer bottle cover to rotate to be arranged opposite to the second lower mold, and the first upper mold, the second upper mold and the first lower mold are driven to stop and cooperate in sequence; the inner bottle blank is blown in the blow molding space to form the inner bottle, wherein the inner bottle and the outer bottle cover are integrally formed, and one end of the outer bottle cover close to the inner bottleneck of the inner bottle is overlapped with the outer side of the inner bottle body of the inner bottle; the outer bottle cover and the inner bottle are output.

[0026] By adopting the above technical scheme, the first upper mold, the second upper mold and the first lower mold cooperate to define an injection molding space, and molten plastic is injected into the injection molding space so that the inner bottle blank and the outer bottle cover can be constructed as an integral molded part, and the upper mold group cooperates with the second lower mold to define a molding space so that the inner bottle blank can be blow-molded to form an inner bottle, and the inner bottle and the outer bottle cover are constructed as an integral molded part through the injection-blow mold, which reduces the number of connecting parts for connecting the inner bottle and the outer bottle, reduces the difficulty of assembling the hollow double-layer bottle, thereby reducing the labor cost of producing the hollow double-layer bottle, and at the same time reduces the time of producing the hollow double-layer bottle.

[0027] Preferably, the first upper mold has an injection mold core or a blow needle, and before the inner bottle blank is blown up in the blow molding space to form the inner bottle, the molding method also includes: driving the first upper mold with the blow needle to move close to the second lower mold so that the blow needle extends into the inner bottle blank.

[0028] By adopting the above technical solution, when the first upper mold with the blow needle moves to be opposite to the second lower mold, the driving member drives the blow needle to approach the second lower mold group along the height direction of the injection mold, so that the blow needle can extend into the inner bottle blank, thereby allowing the gas medium to pass into the inner bottle blank to blow the inner bottle blank into an inner bottle.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. When producing a hollow double-layer bottle, an inner bottle and an outer bottle cover are formed in one piece by injection molding and blow molding using an injection blow mold. Compared with the prior art, the outer bottle cover can connect the inner bottle and the outer bottle, reducing the number of connecting parts for connecting the inner bottle and the outer bottle, reducing the difficulty of assembling the hollow double-layer bottle, thereby reducing the labor cost of producing the hollow double-layer bottle and reducing the time of producing the hollow double-layer bottle;

[0031] 2. When the second upper mold stops against the first lower mold, the first positioning mechanism and the second positioning mechanism are positioned and matched, so that the second upper mold can be accurately matched with the first lower mold, and the first lower mold group and the second upper mold are positioned by the first positioning structure and the second positioning structure, so that the shapes of the inner bottle and the outer bottle cover of each injection are consistent. Similarly, when the second upper mold stops against the second lower mold, the second positioning mechanism and the second positioning mechanism are positioned and matched, so that the second upper mold can be accurately matched with the first lower mold, and the second lower mold group and the second upper mold are positioned by the first positioning structure and the second positioning structure, so that the shapes of the inner bottles molded each time are consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of an injection mold according to an embodiment of the present application;

[0033] Figure 2 is a cross-sectional view of the first upper mold, the second upper mold and the first lower mold after they are sequentially abutted and matched according to an embodiment of the present application;

[0034] Figure 3 is a cross-sectional view of the first upper mold, the second upper mold and the second lower mold after they are sequentially abutted and matched according to the embodiment of the present application;

[0035] Figure 4 is a method flow chart of the molding method according to an embodiment of the present application;

[0036] Figure 5 is a cross-sectional view of the inner bottle blank and the outer bottle cover after being matched according to the embodiment of the present application;

[0037] Figure 6 It is a cross-sectional view of a hollow double-layer bottle according to an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1000, injection blow mold; 100, mounting platform; 102, first upper mold; 103, second upper mold; 104, inner bottle injection gap; 10, blow needle; 11, injection mold core; 105, first positioning structure; 12, positioning protrusion; 13, first die; 14, second die; 109, outer bottle cover injection gap;

[0040] 200, lower mold assembly; 201, first lower mold; 202, second lower mold; 20, injection flow channel; 203, second positioning structure; 21, positioning recess; 204, blow molding space;

[0041] 400, hollow double-layer bottle; 401, outer bottle cover; 402, inner bottle; 403, outer bottle; 404, inner bottleneck; 405, inner bottle blank; 40, bottle mouth; 41, inner bottle body;. DETAILED DESCRIPTION

[0042] The following is combined with Figure 1-Figure 6 This application is described in further detail.

[0043] The embodiment of the present application discloses an injection blow mold 1000 for a hollow double-layer bottle 400. The hollow double-layer bottle 400 includes an inner bottle 402 and an outer bottle cover 401 that are integrally formed. The outer bottle cover 401 surrounds the circumferential outer side of the inner bottle 402. The injection blow mold 1000 is used to mold the outer bottle cover 401 and the inner bottle 402.

[0044] Reference Figure 1-Figure 6According to the embodiment of the present application, the injection blow mold 1000 includes a mounting table 100, a lower mold group 200, a second upper mold 103 and a driving member. The mounting table 100 has a plurality of first upper molds 102, and the plurality of first upper molds 102 are sequentially spaced apart along the circumferential direction of the mounting table 100. The lower mold group 200 includes a first lower mold 201 and a second lower mold 202, and the first lower mold 201 and the second lower mold 202 are spaced apart along the circumferential direction of the mounting table 100. The first lower mold 201 is provided with an injection flow channel 20, the first lower mold 201 is opposite to one of the first upper molds 102, and the second lower mold 202 is opposite to the other first upper mold 102. The second upper mold 103 can be sandwiched between the first upper mold 102 and the first lower mold 201, and the second upper mold 103 can also be sandwiched between the first upper mold 102 and the second lower mold 202.

[0045] The driving member is used to drive the mounting platform 100 to move closer to or away from the lower mold set 200 along the axial direction of the mounting platform 100, so that the mounting platform 100 drives the second upper mold 103 to move closer to or away from the lower mold set 200. The driving member is also used to drive the second upper mold 103 to move closer to or away from the lower mold, and the driving member is used to drive the second upper mold 103 to rotate around the central axis of the mounting platform 100, so that the second upper mold rotates to be arranged opposite to the first lower mold 201 or the second lower mold 202, wherein when the second upper mold 103 is opposite to the first lower mold 201 and stops, the first upper mold 102, the second upper mold 103 and the first lower mold 201 jointly define the inner bottle injection gap 104 and the outer bottle cover injection gap 109 that are connected to each other, the outer bottle cover injection gap 109 surrounds the circumferential outer side of the inner bottle injection gap 104, and the injection runner 20 is connected to the inner bottle injection gap 104.

[0046] The first upper mold assembly includes a blow needle 10. When the second upper mold 103 and the second lower mold 202 are opposite to each other and stop-fitted, the blow needle 10 extends into the second upper mold 103. The first upper mold 102, the second upper mold 103 and the second lower mold 202 jointly define a blow molding space 204 and an outer bottle cover injection molding gap 109 that are interconnected. The blow molding space 204 is arranged opposite to a portion of the bottom wall of the outer bottle cover 401 formed in the outer bottle cover injection molding gap 109.

[0047] Specifically, the inner bottle 402 is blow-molded by the inner bottle blank 405. Before the outer bottle cover 401 and the inner bottle blank 405 are injection-molded, the driving member drives the second upper mold 103 to rotate along the central axis of the mounting table 100 so that the second upper mold 103 is opposite to the first lower mold 201. Then the driving member drives the first upper mold 102 and the second upper mold 103 to move along the axial direction of the mounting table 100 close to the first lower mold 201, so that the first upper mold 102, the second upper mold 103 and the first lower mold 201 are sequentially stopped and matched. At this time, the first upper mold 102 and the second upper mold 103 are The mold 103 cooperates with the first lower mold 201 to define an inner bottle injection gap 104 and an outer bottle cover injection gap 109 that are interconnected. After the second upper mold 103 is abutted against the first lower mold 201 and the first upper mold 102 is abutted against the second upper mold 103, the molten plastic enters the inner bottle injection gap 104 and the outer bottle cover injection gap 109 through the injection channel 20, so that the inner bottle blank 405 and the outer bottle cover 401 are injection molded, and the outer bottle cover 401 and the inner bottle blank 405 are integrally formed, so that the outer bottle cover 401 and the inner bottle blank 405 can be connected and matched.

[0048] After the inner preform 405 and the outer bottle cover 401 are injection molded, the driving member drives the first upper mold 102 to move along the axial direction of the mounting platform 100 through the mounting platform 100 to move away from the second upper mold 103, and the driving member drives the second upper mold 103 to move along the axial direction of the mounting platform 100 to move away from the first lower mold 201, the second upper mold 103 clamps the inner preform 405, so that the inner preform 405 and the outer bottle cover 401 are separated from the first lower mold 201, and the driving member drives the second upper mold 103 to rotate along the central axis of the mounting platform 100, so that the second upper mold 103 drives the inner preform 405 and the outer bottle cover 401 to be opposite to the second lower mold 202. After the inner bottle blank 405 and the outer bottle cover 401 driven by the second upper mold 103 are opposite to the second lower mold 202, the driving member drives the second upper mold 103 to move close to the second lower mold 202 along the axial direction of the mounting table 100, so that the second upper mold 103 cooperates with the second lower mold 202 to define a blow molding space 204 and an injection molding space of the outer bottle cover 401 that are interconnected, and at the same time, the inner bottle blank 405 extends into the blow molding space 204, and by moving the first upper mold 102 close to the second upper mold 103, the blow needle 10 extends into the inner bottle blank 405, and the blow needle 10 passes gas into the second lower mold 202 to blow-mold the inner bottle blank 405 into the inner bottle 402.

[0049] At this time, the inner bottle 402 has an inner bottle body 41 and an inner bottleneck 404, the outer bottle cover 401 surrounds the outer side of the inner bottleneck 404, and one end of the outer bottle cover 401 close to the inner bottleneck 404 of the inner bottle 402 is overlapped with the outer side of the inner bottle body 41 of the inner bottle 402. The outer bottle cover 401 can be connected and cooperated with the outer bottle 403, so that the outer bottle 403 can be connected to the inner bottle 402. The outer bottle cover 401 can be used as a connecting component between the outer bottle 403 and the inner bottle 402, and the outer bottle cover 401 and the inner bottle 402 are integrally formed, which can reduce the connection process between the outer bottle cover 401 and the inner bottle 402.

[0050] Therefore, when producing the hollow double-layer bottle 400, the inner bottle 402 and the outer bottle cover 401 are formed as one piece by injection molding and blow molding using the injection blow mold 1000. Compared with the prior art, the outer bottle cover 401 can connect the inner bottle 402 and the outer bottle 403, reducing the number of connecting parts used to connect the inner bottle 402 and the outer bottle 403, reducing the difficulty of assembling the hollow double-layer bottle 400, thereby reducing the labor cost of producing the hollow double-layer bottle 400, and at the same time reducing the time of producing the hollow double-layer bottle 400.

[0051] See also Figure 2 In some embodiments of the present application, the first upper mold 102 has a molding part for molding the inner bottle 402, and there are multiple second upper molds 103. The multiple second upper molds 103 are sequentially spaced apart along the circumferential direction of the mounting platform 100. The multiple second upper molds 103 are suitable for rotating around the central axis of the mounting platform 100 to correspond to and be arranged relatively with the multiple first upper molds 102 one by one, and each second upper mold 103 defines an outer bottle cover injection gap 109 with the first lower mold 201 or the second lower mold 202. When the injection-blow mold 1000 injects the inner bottle 402 and the outer bottle cover 401, the driving member drives the second upper mold 103 to rotate around the central axis of the mounting platform 100 to correspond to and be arranged relatively with the first lower mold 201. When the second upper mold 103 cooperates with the first lower mold 201 to define the outer bottle cover injection gap 109, the outer bottle cover 401 is injection molded in the outer bottle cover injection gap 109 defined by the second upper mold 103 and the first lower mold 201.

[0052] Furthermore, when the injection-blow mold 1000 blows the inner bottle 402, the driving member drives the second upper mold 103 to rotate around the central axis of the mounting table 100 to correspond to and be relatively arranged with the second lower mold 202, and the second upper mold 103 cooperates with the second lower mold 202 to define an outer bottle cover injection gap 109, and the outer bottle cover injection gap 109 defined by the second upper mold 103 and the second lower mold 202 is used to avoid and fix the formed outer bottle cover 401.

[0053] See also Figure 2In some embodiments of the present application, the molded part of the first upper mold 102 opposite to the first lower mold 201 is configured as an injection mold core 11, the injection mold core 11 passes through the second upper mold 103 and extends into the first lower mold 201, the outer peripheral wall of the injection mold core 11 is spaced apart from the inner wall of the first lower mold 201 to form an inner bottle injection gap 104, and the molded part of the first upper mold 102 opposite to the second lower mold 202 is configured as a blow needle 10.

[0054] Specifically, when the injection-blow mold 1000 injects the inner bottle 402 and the outer bottle cover 401, the first upper mold 102 and the second upper mold 103 stop each other, and the injection mold core 11 passes through the second lower mold 202. At the same time, the injection mold core 11 extends into the first lower mold 201, so that the outer peripheral wall of the injection mold core 11, the second upper mold 103 and the inner wall of the first lower mold 201 cooperate to form the outer bottle cover injection gap 109 and the inner bottle injection gap 104, and the material enters the outer bottle cover injection gap 109 and the inner bottle injection gap 104 through the injection molding channel 20 of the first lower mold 201, so that the inner bottle 402 and the outer bottle cover 401 are integrally formed, and at the same time, the injection mold core 11 can occupy the space in the second upper mold 103 and the first lower mold 201, so that the inner bottle 402 can form a hollow structure.

[0055] Furthermore, when the injection blow mold 1000 blows the inner bottle 402, the first upper mold 102 is opposite to the first lower mold 201 and is stop-fitted, the blow needle 10 penetrates into the first upper mold 102, and the blow needle 10 is opposite to the bottle mouth 40 of the inner bottle 402. The gas is passed into the inner bottle 402 through the bottle mouth 40 by the blow needle 10, so that the inner bottle 402 can be blow-molded, and the shape of the inner bottle 402 is limited by the inner wall of the second lower mold 202 to meet the shape design requirements of the hollow double-layer bottle 400.

[0056] See also Figure 2 In some embodiments of the present application, the end surface of the second upper mold 103 opposite to the first lower mold 201 and the second lower mold 202 may be provided with a first positioning structure 105, and the end surface of the first lower mold 201 opposite to the second upper mold 103 and / or the end surface of the second lower mold 202 opposite to the second upper mold 103 may be provided with a second positioning structure 203, and the first positioning structure 105 and the second positioning structure 203 may be positioned and matched. When the second upper mold 103 and the first lower mold 201 are stopped, the first positioning mechanism and the second positioning mechanism are positioned and matched, so that the second upper mold 103 and the first lower mold 201 are accurately matched, and the first positioning structure 105 and the second positioning structure 203 are used to position the first lower mold 201 and the second upper mold 103, so that the shapes of the inner bottle 402 and the outer bottle cover 401 are consistent each time, and the step defects on the surface of the inner bottle blank 405 can be avoided as much as possible, thereby improving the product quality of the hollow double-layer bottle 400.

[0057] Similarly, when the second upper mold 103 and the second lower mold 202 stop, the first positioning mechanism and the second positioning mechanism are positioned and matched, so that the second upper mold 103 and the second lower mold 202 are accurately matched, and the second lower mold 202 group 200 and the second upper mold 103 are positioned by the first positioning structure 105 and the second positioning structure 203, so that the shape of the inner bottle 402 blow-molded each time can be consistent, and the step defects on the surface of the inner bottle blank 405 can be avoided as much as possible, thereby improving the product quality of the hollow double-layer bottle 400.

[0058] See also Figure 2 In some embodiments of the present application, one of the first positioning structure 105 and the second positioning structure 203 is configured as a positioning protrusion 12 and the other is configured as a positioning recess 21, for example, the first positioning structure 105 is configured as the positioning protrusion 12 and the second positioning structure 203 is configured as the positioning recess 21, or the first positioning structure 105 is configured as the positioning recess 21 and the second positioning structure 203 is configured as the positioning protrusion 12. The positioning protrusion 12 is arranged opposite to the positioning recess 21, and the positioning protrusion 12 protrudes toward the positioning recess 21, and the positioning protrusion 12 can extend into or move out of the positioning recess 21. Specifically, when the second upper mold 103 cooperates with the first lower mold 201 or the second lower mold 202, the positioning protrusion 12 extends into the positioning recess 21, and the positioning protrusion 12 can stop against the inner wall of the positioning recess 21. The positioning protrusion 12 cooperates with the positioning recess 21 to limit the second upper mold 103 from moving relative to the first lower mold 201 along the radial direction of the first lower mold 201, or the positioning protrusion 12 cooperates with the positioning recess 21 to limit the second upper mold 103 from moving relative to the second lower mold 202 along the radial direction of the second lower mold 202, so that the first positioning structure 105 and the second positioning structure 203 can position the second upper mold 103 with the first lower mold 201 or the second lower mold 202, thereby improving the accuracy of the cooperation between the second upper mold 103 and the first lower mold 201 or the second lower mold 202.

[0059] See also Figure 2 , Figure 3 In some embodiments of the present application, there are two second upper molds 103. When the second upper mold 103 is driven by the driving member to rotate around the central axis of the mounting table 100, one of the two second upper molds 103 is arranged opposite to the first lower mold 201 and the other second upper mold 103 is arranged opposite to the second lower mold 202.

[0060] Specifically, when the outer bottle cover 401 and the inner bottle 402 are injected, the second upper mold 103 is driven by the driving member to rotate around the central axis of the mounting platform 100, so that one of the second upper molds 103 is arranged opposite to the first lower mold 201, and the other second upper mold 103 is arranged opposite to the second lower mold 202. When one of the second upper molds 103 is abutted against the first lower mold 201, the material enters the injection gap through the injection flow channel 20 to inject the outer bottle cover 401 and the inner bottle blank 405, and at the same time, the other second upper mold 103 cooperates with the second lower mold 202 to blow-mold the inner bottle 402. By setting two second upper molds 103, the injection-blow mold 1000 can continuously inject and blow the inner bottle 402 and the outer bottle cover 401, thereby improving the production efficiency of the injection-blow mold 1000.

[0061] More specifically, the second upper mold 103 includes a first die 13 and a second die 14, which can move toward each other or away from each other. When the inner bottle 402 and the outer bottle cover 401 are injected, the first die 13 and the second die 14 move toward each other, and the driving member drives the first die 13 and the second die 14 to approach the first lower mold 201 along the height direction of the injection-blow mold 1000, so that the first lower mold 201, the first upper mold 102, the first die 13 and the second die 14 cooperate to define an injection gap. When the driving member drives the mounting table 100 to rotate along the central axis of the mounting table 100, the first die 13 cooperates with the second die 14 to clamp the outer bottle cover 401 and the inner bottle blank 405. After the inner bottle 402 is blow-molded, the first die 13 and the second die 14 move in opposite directions to unlock the inner bottle 402. The inner bottle 402 can be away from the injection blow mold 1000, so that the hollow double-layer bottle 400 can be further processed.

[0062] See also Figure 1 In some embodiments of the present application, there are three second upper molds 103. When the second upper mold 103 is driven by the driving member to rotate around the central axis of the mounting table 100, one of the three second upper molds 103 is arranged opposite to the first lower mold 201 and another one is arranged opposite to the second lower mold 202. Specifically, when the first second upper mold 103 is abutted against the first lower mold 201, the material enters the injection gap through the injection runner 20 to inject the outer bottle cover 401 and the inner bottle blank 405, and at the same time, the second second upper mold 103 is abutted against the second lower mold 202 to blow-mold the inner bottle 402, and the third second upper mold 103 moves to the unloading area to allow the inner bottle 402 and the outer bottle cover 401 to be further processed.

[0063] When the third second upper mold 103 is abutted against the first lower mold 201, the material enters the injection gap through the injection runner 20 to inject the outer bottle cover 401 and the inner bottle blank 405, and at the same time, the first second upper mold 103 is abutted against the second lower mold 202 to blow-mold the inner bottle 402, and the second second upper mold 103 moves to the unloading area so that the inner bottle 402 and the outer bottle cover 401 can be further processed. Similarly, when the second second upper mold 103 is abutted against the first lower mold 201, the material enters the injection gap through the injection runner 20 to inject the outer bottle cover 401 and the inner bottle blank 405, and at the same time, the third second upper mold 103 is abutted against the second lower mold 202 to blow-mold the inner bottle 402, and the first second upper mold 103 moves to the unloading area so that the inner bottle 402 and the outer bottle cover 401 can be further processed. By providing three second upper molds 103 , the injection-blow mold 1000 can simultaneously injection-blow a plurality of inner bottles 402 and outer bottle covers 401 , thereby further improving the production efficiency of the injection-blow mold 1000 .

[0064] Based on this, the present application further proposes an injection-blow device for a hollow double-layer bottle 400, the injection-blow device comprising an injection-blow mold 1000, an injection molding machine and a blow molding machine, the injection-blow mold 1000 being the injection-blow mold 1000 of the above-mentioned embodiment, the injection molding machine having an injection nozzle, the injection nozzle being connected to the injection flow channel 20 of the first lower mold 201 of the injection-blow mold 1000, the injection nozzle being able to inject molten plastic into the injection-blow mold 1000, the blow molding machine having a gas pressure piece, the gas pressure piece being connected to the blow needle 10, the gas pressure piece being used to supply air to the blow needle 10. When producing the hollow double-layer bottle 400, the injection molding machine is used to inject molten plastic into the injection-blow mold 1000 so that the outer bottle cover 401 and the inner bottle 402 can be integrally formed, and the blow molding machine is used to supply air to the blow needle 10 so that the inner bottle 402 can be blow-molded.

[0065] According to the injection-blowing equipment described in the embodiment of the present application, the injection-blowing equipment has an injection-blowing mold 1000. When producing the hollow double-layer bottle 400, the injection-blowing equipment is used to form an integrally formed inner bottle 402 and outer bottle cover 401 through injection molding and blow molding. Compared with the prior art, the outer bottle cover 401 can connect the inner bottle 402 and the outer bottle 403, reducing the number of connecting parts used to connect the inner bottle 402 and the outer bottle 403, reducing the difficulty of assembling the hollow double-layer bottle 400, thereby reducing the labor cost of producing the hollow double-layer bottle 400, and at the same time reducing the time of producing the hollow double-layer bottle 400.

[0066] Based on this, the present application further proposes a molding method for a hollow double-layer bottle 400, which is applicable to an injection-blow molding device for a hollow double-layer bottle 400 in the above embodiment. The molding method is used to mold an inner bottle 402 and an outer bottle cover 401. The molding method for the hollow double-layer bottle 400 includes the following steps:

[0067] S100 , driving the second upper mold 103 to be disposed opposite to the first lower mold 201 , and driving the first upper mold 102 , the second upper mold 103 and the first lower mold 201 to stop and fit in sequence.

[0068] S101, the injection molding machine injects molten plastic into the inner bottle injection molding gap 104 and the outer bottle cover injection molding gap 109 connected to the inner bottle injection molding gap 104, so that the inner bottle blank 405 is formed in the inner bottle injection molding gap 104, and the outer bottle cover 401 is formed in the outer bottle cover injection molding gap 109, wherein the inner bottle blank 405 and the outer bottle cover 401 are integrally formed.

[0069] S102, the driving member drives the mounting platform 100 away from the first lower mold 201, and the driving member drives the second upper mold 103 to drive the inner bottle blank 405 and the outer bottle cover 401 to be arranged opposite to the second lower mold 202, so that the second upper mold 103 is separated from the first upper mold 102 and the first lower mold 201.

[0070] S103, the driving member drives the second upper mold 103 to drive the inner bottle blank 405 and the outer bottle cover 401 to rotate to be arranged opposite to the second lower mold 202, and drives the first upper mold 102, the second upper mold 103 and the first lower mold 201 to stop and cooperate in sequence.

[0071] S104, the blow molding machine blows up the inner bottle blank 405 in the blow molding space 204 to form the inner bottle 402, wherein the inner bottle 402 and the outer bottle cover 401 are integrally formed, and one end of the outer bottle cover 401 close to the inner bottleneck 404 of the inner bottle 402 is overlapped with the outer side of the inner bottle body 41 of the inner bottle 402.

[0072] S105, output the outer bottle cover 401 and the inner bottle 402. After the inner bottle 402 is blow-molded, the driving member drives the inner bottle 402 and the outer bottle cover 401 to move to the unloading area through the upper mold assembly, so that the injection-blow molding equipment outputs the outer bottle cover 401 and the inner bottle 402.

[0073] Thus, the first upper mold 102, the second upper mold 103 and the first lower mold 201 cooperate to define an injection space, and molten plastic is injected into the injection space so that the inner bottle blank 405 and the outer bottle cover 401 can be constructed as an integrally formed part, and the first upper mold 102, the second upper mold 103 and the second lower mold 202 cooperate to define a molding space so that the inner bottle blank 405 can be blow-molded to form the inner bottle 402, and the inner bottle 402 and the outer bottle cover 401 formed by using a molding method are constructed as an integrally formed part, which reduces the number of connecting components for connecting the inner bottle 402 and the outer bottle 403, reduces the difficulty of assembling the hollow double-layer bottle 400, thereby reducing the labor cost of producing the hollow double-layer bottle 400, and at the same time reduces the time of producing the hollow double-layer bottle 400.

[0074] In some embodiments of the present application, the first upper mold 102 has an injection mold core 11 or a blow needle 10, and before the inner bottle blank 405 is blown up in the blow molding space 204 to form the inner bottle 402, the following steps may also be included:

[0075] S10 , driving the first upper mold 102 having the injection mold core 11 to move close to the second lower mold 202 so that the blow needle 10 extends into the inner preform 405 .

[0076] Among them, the driving member of the above-mentioned embodiment is used to drive the first upper mold 102 to move close to the second lower mold 202, and the driving member drives the first upper mold 102 with the blow needle 10 to move opposite to the second lower mold 202. When the first upper mold 102 with the blow needle 10 moves to be opposite to the second lower mold 202, the driving member drives the blow needle 10 to approach the second lower mold 202 group 200 along the height direction of the injection mold, so that the blow needle 10 extends into the inner bottle blank 405, thereby allowing gas to pass into the inner bottle blank 405 to blow up the inner bottle blank 405 to form an inner bottle 402.

[0077] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection blow mold for a hollow double-layer bottle, the hollow double-layer bottle (400) comprising an inner bottle (402) and an outer bottle cover (401) formed in one piece, the outer bottle cover (401) surrounding the outer side of the inner bottle (402), the injection blow mold (1000) being used to mold the outer bottle cover (401) and the inner bottle (402), characterized in that: The injection blow mold (1000) comprises: A mounting platform (100), wherein the mounting platform (100) has a plurality of first upper molds (102), and the plurality of first upper molds (102) are sequentially spaced apart and arranged along a circumferential direction of the mounting platform (100); A lower mold group (200), the lower mold group (200) comprising a first lower mold (201) and a second lower mold (202), the first lower mold (201) and the second lower mold (202) being arranged spaced apart along the circumferential direction of the mounting platform (100), the first lower mold (201) being provided with an injection flow channel (20), the first lower mold (201) being opposite to one of the first upper molds (102), and the second lower mold (202) being opposite to the other of the first upper molds (102); a second upper mold (103), the second upper mold (103) being suitable for being sandwiched between the first upper mold (102) and the first lower mold (201), and between the first upper mold (102) and the second lower mold (202); a driving member, the driving member being used to drive the mounting platform (100) to move toward or away from the lower mold group (200) along the axial direction of the mounting platform (100), and also being used to drive the second upper mold (103) to move toward or away from the lower mold group (200) and to rotate around the central axis of the mounting platform (100), so that the second upper mold (103) is rotated to be arranged opposite to the first lower mold (201) or the second lower mold (202); Wherein, when the second upper mold (103) and the first lower mold (201) are opposite to each other and are in abutment engagement, the first upper mold (102), the second upper mold (103) and the first lower mold (201) jointly define an inner bottle injection molding gap (104) and an outer bottle cover injection molding gap (109) that are in communication with each other, the outer bottle cover injection molding gap (109) surrounds the circumferential outer side of the inner bottle injection molding gap (104), and the injection molding runner (20) is in communication with the inner bottle injection molding gap (104); When the second upper mold (103) and the second lower mold (202) are opposite to each other and are in abutment engagement, the first upper mold (102) comprises a blow needle (10), the blow needle (10) extends into the second upper mold (103), the first upper mold (102), the second upper mold (103) and the second lower mold (202) jointly define a blow molding space (204) and the outer bottle cover injection molding gap (109) which are interconnected, and the blow molding space (204) and a portion of the bottom wall of the outer bottle cover (401) formed in the outer bottle cover injection molding gap (109) are arranged opposite to each other; The first upper mold (102) has a molding part for molding the inner bottle (402); there are a plurality of second upper molds (103); the plurality of second upper molds (103) are sequentially spaced apart along the circumferential direction of the mounting platform (100); the plurality of second upper molds (103) are suitable for rotating around the central axis of the mounting platform (100) to correspond to and be arranged relatively to the plurality of first upper molds (102); each second upper mold (103) defines an injection gap (109) for the outer bottle cover with the first lower mold (201) or the second lower mold (202); There are two second upper molds (103). When the second upper mold (103) is driven by the driving member to rotate around the central axis of the mounting platform (100), one of the two second upper molds (103) is arranged opposite to the first lower mold (201) and the other is arranged opposite to the second lower mold (202).

2. The injection blow mold for a hollow double-layer bottle according to claim 1, characterized in that: The molded part of the first upper mold (102) opposite to the first lower mold (201) is configured as an injection mold core (11), the injection mold core (11) passes through the second upper mold (103) and extends into the first lower mold (201), and the outer peripheral wall of the injection mold core (11) is spaced apart from the inner wall of the first lower mold (201) to form the inner bottle injection gap (104); The molded part of the first upper mold (102) opposite to the second lower mold (202) is configured as the blow needle (10).

3. The injection blow mold for a hollow double-layer bottle according to claim 1, characterized in that: The end face of the second upper mold (103) opposite to the first lower mold (201) and the second lower mold (202) is provided with a first positioning structure (105), the end face of the first lower mold (201) opposite to the second upper mold (103), and / or the end face of the second lower mold (202) opposite to the second upper mold (103) is correspondingly provided with a second positioning structure (203), and the first positioning structure (105) is positioned and matched with the second positioning structure (203).

4. The injection blow mold for a hollow double-layer bottle according to claim 3, characterized in that: One of the first positioning structure (105) and the second positioning structure (203) is configured as a positioning protrusion (12) and the other is configured as a positioning recess (21); the positioning protrusion (12) is arranged opposite to the positioning recess (21), and the positioning protrusion (12) protrudes toward the positioning recess (21); the positioning protrusion (12) is suitable for extending into or moving out of the positioning recess (21).

5. The injection blow mold for a hollow double-layer bottle according to claim 1, characterized in that: There are three second upper molds (103). When the second upper molds (103) are driven by the driving member to rotate around the central axis of the mounting platform (100), one of the three second upper molds (103) is arranged opposite to the first lower mold (201) and another one is arranged opposite to the second lower mold (202).

6. An injection-blowing device for hollow double-layer bottles, characterized in that: include: An injection blow mold (1000), wherein the injection blow mold (1000) is an injection blow mold (1000) for a hollow double-layer bottle (400) according to any one of claims 1 to 5; an injection molding machine, the injection molding machine comprising an injection molding nozzle, the injection molding nozzle being in communication with the injection molding flow channel (20) of the first lower mold (201) of the injection-blow mold (1000), so that the injection molding nozzle can inject molten plastic into the injection-blow mold (1000); A blow molding machine, the blow molding machine having a pneumatic component, the pneumatic component being connected to the blow needle (10), and the pneumatic component being used to supply air to the blow needle (10).

7. A method for forming a hollow double-layer bottle, the method being applicable to the injection-blow molding device for a hollow double-layer bottle (400) according to claim 6, the method being used for forming the inner bottle (402) and the outer bottle cover (401), characterized in that: The molding method comprises: driving the second upper mold (103) to be arranged opposite to the first lower mold (201), and driving the first upper mold (102), the second upper mold (103) and the first lower mold (201) to stop and fit in sequence; Injecting molten plastic into the inner bottle injection gap (104) and the outer bottle cover injection gap (109) communicating with the inner bottle injection gap (104), so that an inner bottle blank (405) is formed in the inner bottle injection gap (104), and an outer bottle cover (401) is formed in the outer bottle cover injection gap (109), wherein the inner bottle blank (405) and the outer bottle cover (401) are integrally formed; driving the mounting platform (100) away from the first lower mold (201), and driving the second upper mold (103) to drive the inner bottle blank (405) and the outer bottle cover (401) away from the first lower mold (201), so that the second upper mold (103) is separated from the first upper mold (102) and the first lower mold (201); The second upper mold (103) is driven to drive the inner bottle blank (405) and the outer bottle cover (401) to rotate to be arranged opposite to the second lower mold (202), and the first upper mold (102), the second upper mold (103) and the first lower mold (201) are driven to stop and match in sequence; The inner bottle blank (405) is inflated in the blow molding space (204) to form the inner bottle (402), wherein the inner bottle (402) and the outer bottle cover (401) are integrally formed, and one end of the outer bottle cover (401) close to the inner bottle neck (404) of the inner bottle (402) is overlapped with the outer side of the inner bottle body (41) of the inner bottle (402); The outer bottle cover (401) and the inner bottle (402) are output.

8. The method for forming a hollow double-layer bottle according to claim 7, characterized in that: The first upper mold (102) has an injection mold core (11) or a blow needle (10), and before the inner bottle blank (405) is blown up in the blow molding space (204) to form the inner bottle (402), the method further includes: The first upper mold (102) having the blow needle (10) is driven to move close to the second lower mold (202) so that the blow needle (10) extends into the inner preform (405).

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