Cavity plate cooling channel structure and preform mold

Abstract

The present application relates to the technical field of mold parts, and provides a cavity plate cooling channel structure and a preform mold to solve the problem that the connection between the existing cavity plate cooling channel structure and the cooling channel structures of multiple cavity assemblies is complicated, resulting in an overly messy connection structure on the cavity plate, and also resulting in the cavity plate cooling channel structure requiring many control ports and being difficult to control. The present application comprises: a cavity plate body, on which a coolant inlet pipe and a coolant outlet pipe are provided; a plurality of cavity assemblies, which are spaced apart and arranged on the cavity plate body, each of the cavity assemblies including a cavity and a bottom mold, the cavity being provided with a cavity cooling channel, the bottom mold being provided with a bottom mold cooling channel, each of the cavity cooling channels being connected to the bottom mold cooling channel located on the same cavity assembly; a first connecting pipe and a second connecting pipe are provided between the middle cavity assembly and the adjacent cavity assembly.

Description

Technical Field

[0001] The present application relates to the technical field of mold parts, and more specifically, to a cavity plate cooling channel structure and a preform mold. Background Art

[0002] The preform mold is generally composed of a core plate, a separation plate and a cavity plate. The core plate and the separation plate serve as a movable template, and the cavity plate serves as a fixed template. The movable template is combined with the fixed template to form one or more mold cavities. The preform is injected into the mold cavity through the runner under high pressure to make a melt. The preform in the mold cavity is cooled to form a preform, which can be formed into a plastic bottle through subsequent blow molding.

[0003] The mold cavity is generally defined by the space between the cavity assembly, the mouth die assembly and the core rod assembly. The cavity assembly is used to be set on the cavity plate and at least defines the bottle body portion of the external shape of the bottle blank; the mouth die assembly is used to be set on the separation plate and at least defines the neck portion of the external shape of the bottle blank; the core rod assembly is used to be set on the core plate and at least defines the internal shape of the bottle blank.

[0004] To improve preform manufacturing efficiency, a cavity plate is typically equipped with as many cavity assemblies as possible, and to maximize space utilization, the gaps between cavity assemblies are minimized. The cavity assembly typically consists of a precisely connected flange, cavity, and bottom mold. The cavity is located within the cavity plate, the flange is located above the cavity plate, and the bottom mold is located below the cavity plate. To quickly cool the preform melt injected into the mold cavity, cooling channels are typically provided within the cavity and bottom mold to shorten the preform molding cycle. (Because the cavity assembly, as the most critical component of the molded part, defines the largest portion of the preform, its cooling determines the preform molding cycle.) Coolant flowing into the cooling channels of the cavity and the bottom film is introduced through the cooling channels on the cavity plate.

[0005] Since multiple cavity components are arranged on the cavity plate, the connection between the cooling channel structure of the existing cavity plate and the cooling channel structures of the multiple cavity components is complicated, resulting in the connection structure on the cavity plate being too messy. In addition, the above-mentioned setting will also result in the cooling channel structure of the cavity plate requiring many control ports and being difficult to control.

[0006] Therefore, the prior art needs to be improved. Summary of the Invention

[0007] The purpose of the present application is to provide a cavity plate cooling channel structure and a bottle blank mold to solve the problem that the connection between the cooling channel structure of the existing cavity plate and the cooling channel structures of multiple cavity components is complicated, resulting in the connection structure on the cavity plate being too messy, and also resulting in the cooling channel structure of the cavity plate requiring many control ports and being difficult to control.

[0008] To achieve the above objectives, the technical solution adopted in the first embodiment of the present application is:

[0009] A cavity plate cooling channel structure, comprising:

[0010] The cavity plate body is provided with a coolant inlet pipe opening and a coolant outlet pipe opening;

[0011] A plurality of cavity assemblies are arranged at intervals on the cavity plate body, each of the cavity assemblies includes a cavity and a bottom mold, a cavity cooling channel is provided on the cavity, a bottom mold is provided on the bottom mold, and each of the cavity cooling channels is connected to the bottom mold cooling channel located on the same cavity assembly; a first connecting pipe and a second connecting pipe are provided between the cavity assembly located in the middle and the adjacent cavity assemblies, the adjacent cavity cooling channels are connected through the first connecting pipe, and the adjacent bottom mold cooling channels are connected through the second connecting pipe; A third connecting pipe and a fourth connecting pipe are provided between the cavity assembly on the side and the cavity plate body, and a first blocking member is provided on the third connecting pipe and the fourth connecting pipe; the coolant inlet pipe is connected to the first connecting pipe located on one side; the coolant outlet pipe is connected to the second connecting pipe located on the other side; a second blocking member is provided on each first connecting pipe on the plurality of first connecting pipes, and a third blocking member is provided on each second connecting pipe on the plurality of second connecting pipes, and the second blocking member and the third blocking member are staggered.

[0012] According to the cavity plate cooling channel structure described above, two cooling liquid inlet pipe openings are provided, and two cooling liquid outlet pipe openings are provided, wherein one cooling liquid inlet pipe opening corresponds to one cooling liquid outlet pipe opening.

[0013] According to the cavity plate cooling channel structure described above, one of the two cooling liquid inlet pipe openings is connected to the second connecting pipe located on one side, and the other is connected to the second connecting pipe located on the other side.

[0014] According to the cavity plate cooling channel structure described above, the two cooling liquid outlet pipe openings are connected to the first connecting pipe located in the middle.

[0015] According to the cavity plate cooling channel structure described above, the cavity assembly further includes:

[0016] A flange is provided on the upper end surface of the cavity and is connected to the cavity plate body.

[0017] According to the cavity plate cooling channel structure described above, several flanges are integrated to form a pressure plate.

[0018] According to the cavity plate cooling channel structure described above, the cavity plate cooling channel structure further includes:

[0019] A plurality of first threaded fasteners pass through the flange and are arranged on the cavity plate body.

[0020] According to the cavity plate cooling channel structure described above, a fixed positioning groove is provided on the bottom mold, and the cavity plate cooling channel structure further includes:

[0021] The second threaded fastener has an end head and an end tail, wherein the end head part abuts against the fixed positioning groove and the other part abuts against the cavity plate body, and the end tail is arranged on the cavity plate body to fix the bottom mold on the cavity plate body.

[0022] According to the cavity plate cooling channel structure described above, the cavity plate cooling channel structure further includes:

[0023] A socket, part of which rests on the fixed positioning groove and the other part is used to rest on the cavity plate body. The end of the second threaded fastener is set on the socket, and the tail passes through the socket and is set on the cavity plate body.

[0024] The technical solution adopted in the second embodiment of the present application is:

[0025] A bottle preform mold comprises the cavity plate cooling channel structure described above.

[0026] The beneficial effects of the cavity plate cooling channel structure and preform mold provided by the present application are at least:

[0027] The present application connects the cavity cooling channel of each cavity assembly with the bottom mold cooling channel thereon, thereby increasing the cooling channel area of ​​the cavity assembly compared to independently opening the cavity cooling channel and the bottom mold cooling channel, and can improve the cooling effect of the cavity assembly. The present application also sets a first connecting pipe and a second connecting pipe to connect the cooling channels of all adjacent cavity assemblies (cavity cooling channels and bottom mold cooling channels) into one channel, thereby simplifying and regularizing the connection between the cavity plate body and the cooling channel structure of the cavity assembly. Only one control port is required to control the entire cavity cooling channel structure, which is convenient to control. In addition, the present application uses a second barrier member and a third barrier member to enable adjacent cavity assemblies to be connected in sequence to form a loop, and to enable the coolant to flow through the cavity cooling channel and the bottom mold cooling channel in each cavity assembly, thereby avoiding cooling by the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] Figure 1 A schematic diagram of the three-dimensional structure of a cavity plate cooling channel structure provided in an embodiment of the present application.

[0030] Figure 2 for Figure 1 Enlarged view of point A.

[0031] Figure 3 This is a front structural schematic diagram of a cavity plate cooling channel structure provided in an embodiment of the present application.

[0032] Figure 4 for Figure 3 BB cross-sectional view.

[0033] Figure 5 This is a structural schematic diagram of a cavity plate cooling channel structure provided in an embodiment of the present application, in which a pressure plate is arranged on a cavity plate body.

[0034] Figure 6 This is a schematic diagram of the back structure of a cavity plate cooling channel structure provided in an embodiment of the present application.

[0035] Figure 7 for Figure 6 Enlarged view of point C.

[0036] Figure 8 This is an exploded view of a cavity assembly in a cavity plate cooling channel structure provided in an embodiment of the present application.

[0037] Among them, the reference numerals in the figures are:

[0038] 1. Cavity plate body; 11. Coolant inlet pipe; 12. Coolant outlet pipe; 2. Cavity assembly; 21. Cavity; 211. Cavity cooling channel; 22. Bottom mold; 221. Bottom mold cooling channel; 222. Fixed positioning groove; 23. Press plate; 231. Flange; 3. First connecting pipe; 4. Second connecting pipe; 5. Third connecting pipe; 6. Fourth connecting pipe; 71. First barrier; 72. Second barrier; 73. Third barrier; 8. First threaded fastener; 9. Second threaded fastener; 10. Socket. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0040] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be located directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0041] The preform mold is generally composed of a core plate, a separation plate and a cavity plate. The core plate and the separation plate serve as a movable template, and the cavity plate serves as a fixed template. The movable template is combined with the fixed template to form one or more mold cavities. The preform is injected into the mold cavity through the runner under high pressure to make a melt. The preform in the mold cavity is cooled to form a preform, which can be formed into a plastic bottle through subsequent blow molding.

[0042] The mold cavity is generally defined by the space between the cavity assembly, the mouth die assembly and the core rod assembly. The cavity assembly is used to be set on the cavity plate and at least defines the bottle body portion of the external shape of the bottle blank; the mouth die assembly is used to be set on the separation plate and at least defines the neck portion of the external shape of the bottle blank; the core rod assembly is used to be set on the core plate and at least defines the internal shape of the bottle blank.

[0043] To improve preform manufacturing efficiency, a cavity plate is typically equipped with as many cavity assemblies as possible, and to maximize space utilization, the gaps between cavity assemblies are minimized. The cavity assembly typically consists of a precisely connected flange, cavity, and bottom mold. The cavity is located within the cavity plate, the flange is located above the cavity plate, and the bottom mold is located below the cavity plate. To quickly cool the preform melt injected into the mold cavity, cooling channels are typically provided within the cavity and bottom mold to shorten the preform molding cycle. (Because the cavity assembly, as the most critical component of the molded part, defines the largest portion of the preform, its cooling determines the preform molding cycle.) Coolant flowing into the cooling channels of the cavity and the bottom film is introduced through the cooling channels on the cavity plate.

[0044] Since multiple cavity components are arranged on the cavity plate, the connection between the cooling channel structure of the existing cavity plate and the cooling channel structures of the multiple cavity components is complicated, resulting in the connection structure on the cavity plate being too messy. In addition, the above-mentioned setting will also result in the cooling channel structure of the cavity plate requiring many control ports and being difficult to control.

[0045] For this purpose, see Figure 1 、 Figure 3 and Figure 4 , a first aspect of an embodiment of the present application provides a cavity plate cooling channel structure, the cavity plate cooling channel structure includes a cavity plate body 1 and multiple cavity components 2, the cavity plate body 1 is provided with a coolant inlet pipe 11 and a coolant outlet pipe 12, multiple cavity components 2 are arranged at intervals on the cavity plate body 1, each of the cavity components 2 includes a cavity 21 and a bottom mold 22, the cavity 21 is provided with a cavity cooling channel 211, the bottom mold 22 is provided with a bottom mold cooling channel 221, each of the cavity cooling channels 211 is connected to the bottom mold cooling channel 221 located on the same cavity component 2, a first connecting pipe 3 and a second connecting pipe 4 are provided between the cavity component 2 located in the middle and the adjacent cavity component 2, and the adjacent cavity cooling channels 211 are connected. The first connecting pipe 3 is connected, and the adjacent bottom mold cooling channels 221 are connected through the second connecting pipe 4. A third connecting pipe 5 and a fourth connecting pipe 6 are provided between the cavity assembly 2 located on the side and the cavity plate body 1, and a first barrier 71 is provided on the third connecting pipe 5 and the fourth connecting pipe 6; the coolant inlet pipe 11 is connected to the first connecting pipe 3 located on one side, and the coolant outlet pipe 12 is connected to the second connecting pipe 4 located on the other side. A second barrier 72 is provided for each first connecting pipe 3 on multiple first connecting pipes 3, and a third barrier 73 is provided for each second connecting pipe 4 on multiple second connecting pipes 4, and the second barrier 72 and the third barrier 73 are staggered.

[0046] In this embodiment, the cavity cooling channel 211 of each cavity assembly 2 is connected with the bottom mold cooling channel 221 thereon. Compared with the case where the cavity cooling channel 211 and the bottom mold cooling channel 221 are opened independently, the cooling channel area of ​​the cavity assembly 2 is increased, and the cooling effect of the cavity assembly 2 can be improved. In this embodiment, the first connecting pipe 3 and the second connecting pipe 4 are provided to connect the cooling channels of all adjacent cavity assemblies 2 (the cavity cooling channel 211 and the bottom mold 22 cooling flow) into one channel, so that the cooling channel of the cavity plate body 1 and the cavity assembly 2 are connected. The connection between the structures is simplified and regularized. Only one control port is required to control the entire cavity cooling channel structure, which is convenient to control. In addition, in this embodiment, the second barrier 72 and the third barrier 73 are used to enable adjacent cavity components 2 to be connected in sequence to form a loop, and to enable the coolant to flow through the cavity cooling channel 211 and the bottom mold cooling channel 221 in each cavity component 2, thereby preventing the coolant from flowing only through the bottom mold cooling channel 221 and failing to pass through the cavity cooling channel 211 when flowing into the cavity component 2 through the coolant inlet pipe 11.

[0047] Optional, see Figure 3 and Figure 4 In one embodiment, two coolant inlet pipe openings 11 are provided, and two coolant outlet pipe openings 12 are provided, wherein one coolant inlet pipe opening 11 corresponds to one coolant outlet pipe opening 12. In this way, the two coolant inlet pipe openings 11 can form two circuits. It can be foreseen that on the same cavity plate body 1, the two circuits enhance the cooling flow intensity of the coolant compared to one circuit, increase the flow area of ​​the coolant per unit time, and thus enhance the cooling effect of the cavity plate cooling channel structure through the coolant.

[0048] Optional, see Figure 3 and Figure 4 In one embodiment, one of the two coolant inlet pipe openings 11 is connected to the second connecting pipe 4 located on one side, and the other is connected to the second connecting pipe 4 located on the other side.

[0049] Optional, see Figure 3 and Figure 4 In one embodiment, the two coolant outlet pipes 12 are connected to the first connecting pipe 3 located in the middle.

[0050] Optional, see Figure 1 and Figure 2 In one embodiment, the cavity assembly 2 further includes a flange 231 , which is disposed on the upper end surface of the cavity 21 and connected to the cavity plate body 1 .

[0051] Optionally, in one embodiment, a plurality of flanges 231 are integrated to form a pressure plate 23, see Figure 5 The pressure plate 23 can be integrated by four flanges 231, that is, four cavities 21 can be correspondingly set on one pressure plate 23. By integrating the flanges 231, this embodiment can reduce the assembly process and improve the assembly efficiency of the cavity component 2.

[0052] Optional, see Figure 1 and Figure 2 In one embodiment, the cavity plate cooling channel structure further includes a plurality of first threaded fasteners 8, which pass through the flange 231 and are arranged on the cavity plate body 1. It can be understood that the flange 231 is connected to the cavity plate body 1 through the first threaded fasteners 8.

[0053] Among them, see Figure 1 and Figure 2 In one embodiment, four first threaded fasteners 8 may be provided, and the first threaded fasteners 8 may be provided as bolts.

[0054] Optional, see Figure 6 、 Figure 7 and Figure 8 In one embodiment, a fixed positioning groove 222 is provided on the bottom mold 22, and the cavity plate cooling flow channel structure further includes a second threaded fastener 9, which has an end and a tail. The end portion rests in the fixed positioning groove 222 and the other portion rests on the cavity plate body 1. The tail is provided on the cavity plate body 1 to fix the bottom mold 22 on the cavity plate body 1.

[0055] Optional, see Figure 6 、 Figure 7 and Figure 8 In one embodiment, the cavity plate cooling channel structure further includes a socket 10, part of which rests on the fixed positioning groove 222 and the other part is used to rest on the cavity plate body 1, the end of the second threaded fastener 9 is set on the socket 10, and the tail passes through the socket 10 and is set on the cavity plate body 1.

[0056] In this embodiment, the sleeve seat 10 is provided. Compared with directly resting the end of the second threaded fastener 9 on the fixed positioning groove 222 and the cavity plate body 1, the provision of the sleeve seat 10 can make the contact area between the second threaded fastener 9 and the fixed positioning groove 222 and the cavity plate body 1 larger, thereby making the connection structure of the second threaded fastener 9 used to connect the bottom mold 22 and the cavity plate body 1 more stable.

[0057] Among them, see Figure 8 In one embodiment, the fixed positioning grooves 222 can be set to two, and accordingly, the second threaded fasteners 9 can be set to two, and the sockets 10 can also be set to two, and the second threaded fasteners 9 can be set to bolts.

[0058] A second aspect of an embodiment of the present application provides a preform mold, comprising the cavity plate cooling channel structure as described above.

[0059] In summary, the present application provides a cavity plate cooling channel structure and a preform mold, wherein the cavity plate cooling channel structure includes a cavity plate body 1 and multiple cavity components 2, the cavity plate body 1 is provided with a coolant inlet pipe port 11 and a coolant outlet pipe port 12, and multiple cavity components 2 are arranged at intervals on the cavity plate body 1, each of the cavity components 2 includes a cavity 21 and a bottom mold 22, the cavity 21 is provided with a cavity cooling channel 211, and the bottom mold 22 is provided with a bottom mold cooling channel 221, each of the cavity cooling channels 211 is connected to the bottom mold cooling channel 221 located on the same cavity component 2, and a first connecting pipe 3 and a second connecting pipe 4 are provided between the cavity component 2 located in the middle and the adjacent cavity component 2, and the adjacent cavity cooling channels 211 are connected. The cooling channels 221 of the bottom mold are connected through the first connecting pipe 3, and the adjacent bottom mold cooling channels 221 are connected through the second connecting pipe 4. A third connecting pipe 5 and a fourth connecting pipe 6 are provided between the cavity assembly 2 located on the side and the cavity plate body 1, and the third connecting pipe 5 and the fourth connecting pipe 6 are both provided with a first blocking member 71; the coolant inlet pipe 11 is connected to the first connecting pipe 3 located on one side, and the coolant outlet pipe 12 is connected to the second connecting pipe 4 located on the other side, and a second blocking member 72 is provided for each first connecting pipe 3 on multiple first connecting pipes 3, and a third blocking member 73 is provided for each second connecting pipe 4 on multiple second connecting pipes 4, and the second blocking member 72 and the third blocking member 73 are staggered. The present application connects the cavity cooling channel 211 of each cavity assembly 2 with the bottom mold cooling channel 221 thereon, thereby increasing the cooling channel area of ​​the cavity assembly 2 compared to the case where the cavity cooling channel 211 and the bottom mold cooling channel 221 are opened independently, thereby improving the cooling effect of the cavity assembly 2. The present application also connects the cooling channels of all adjacent cavity assemblies 2 (cavity cooling channel 211 and bottom mold 22 cooling flow) into one channel by setting a first connecting pipe 3 and a second connecting pipe 4, so as to connect the cooling channels of the cavity plate body 1 and the cavity assembly 2 into one channel. The connection between the structures is simplified and regularized. Only one control port is required to control the entire cavity cooling channel structure, which is convenient to control. In addition, the present application uses the second barrier 72 and the third barrier 73 to enable adjacent cavity components 2 to be connected in sequence to form a loop, and to enable the coolant to flow through the cavity cooling channel 211 and the bottom mold cooling channel 221 in each cavity component 2, thereby preventing the coolant from flowing only through the bottom mold cooling channel 221 and failing to pass through the cavity cooling channel 211 when flowing into the cavity component 2 through the coolant inlet pipe 11.

[0060] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A cavity plate cooling channel structure, characterized in that: include: The cavity plate body is provided with a coolant inlet pipe opening and a coolant outlet pipe opening; A plurality of cavity assemblies are arranged at intervals on the cavity plate body, each of the cavity assemblies includes a cavity and a bottom mold, a cavity cooling channel is provided on the cavity, a bottom mold is provided on the bottom mold, and each of the cavity cooling channels is connected to the bottom mold cooling channel located on the same cavity assembly; a first connecting pipe and a second connecting pipe are provided between the cavity assembly located in the middle and the adjacent cavity assemblies, the adjacent cavity cooling channels are connected through the first connecting pipe, and the adjacent bottom mold cooling channels are connected through the second connecting pipe; A third connecting pipe and a fourth connecting pipe are provided between the cavity assembly on the side and the cavity plate body, and a first blocking member is provided on the third connecting pipe and the fourth connecting pipe; the coolant inlet pipe is connected to the first connecting pipe located on one side; the coolant outlet pipe is connected to the second connecting pipe located on the other side; a second blocking member is provided on each first connecting pipe on the plurality of first connecting pipes, and a third blocking member is provided on each second connecting pipe on the plurality of second connecting pipes, and the second blocking member and the third blocking member are staggered.

2. The cavity plate cooling channel structure according to claim 1, characterized in that: There are two coolant inlet pipe openings, and two coolant outlet pipe openings, wherein one coolant inlet pipe opening corresponds to one coolant outlet pipe opening.

3. The cavity plate cooling channel structure according to claim 2, characterized in that: One of the two cooling liquid inlet pipe openings is connected to the second connecting pipe located on one side, and the other is connected to the second connecting pipe located on the other side.

4. The cavity plate cooling channel structure according to claim 2, characterized in that: The two coolant outlet pipe openings are connected to the first connecting pipe located in the middle.

5. The cavity plate cooling channel structure according to claim 1, characterized in that: The cavity assembly further comprises: A flange is provided on the upper end surface of the cavity and is connected to the cavity plate body.

6. The cavity plate cooling channel structure according to claim 5, characterized in that: A plurality of flanges are integrated to form a pressure plate.

7. The cavity plate cooling channel structure according to claim 5, characterized in that: The cavity plate cooling channel structure further includes: A plurality of first threaded fasteners pass through the flange and are arranged on the cavity plate body.

8. The cavity plate cooling channel structure according to claim 7, characterized in that: The bottom mold is provided with a fixed positioning groove, and the cavity plate cooling channel structure further includes: The second threaded fastener has an end head and an end tail, wherein the end head part abuts against the fixed positioning groove and the other part abuts against the cavity plate body, and the end tail is arranged on the cavity plate body to fix the bottom mold on the cavity plate body.

9. The cavity plate cooling channel structure according to claim 8, characterized in that: The cavity plate cooling channel structure further includes: A socket, part of which rests on the fixed positioning groove and the other part is used to rest on the cavity plate body. The end of the second threaded fastener is set on the socket, and the tail passes through the socket and is set on the cavity plate body.

10. A preform mold, characterized in that: It comprises the cavity plate cooling channel structure according to any one of claims 1 to 9.

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