Combined mold lip for bottle preform mold and bottle preform mold

Abstract

The application relates to a combined mold lip of a bottle blank mold and the bottle blank mold, the combined mold lip comprises two mirror-symmetrical half mold lip parts, the half mold lip parts comprise a half mold lip base body and a half mold lip insert fixed to the half mold lip base body, the half mold lip insert and the half mold lip base body are configured to define a forming surface of the half mold lip part; the bottle blank mold comprises at least one forming assembly, the forming assembly comprises a mold core, a mold cavity and a mold lip which define at least partial bottle blank forming, and the mold lip is a combined mold lip; by distributing half bottle blank forming positions to the half mold lip base body and the half mold lip insert, the base body forming surface on the half mold lip base body and the insert forming surface on the half mold lip insert can be processed separately, the processing difficulty of the respective forming surfaces is reduced, and the influence of multiple clamping on processing positioning is avoided.

Description

Technical Field

[0001] This invention belongs to the technical field of preform mold lip structure, specifically relating to a combined mold lip for preform molds and a preform mold. Background Technology

[0002] In the prior art, the die lip of a preform mold with a handle, as disclosed in Chinese patent document CN113071786A entitled "Preform with Handle, Bottle and Preform Processing Mold," has a half-preform forming position inside the die lip for defining the preform opening and part of the preform body, and a half-handle forming position for defining the preform handle. The structures of the half-preform forming position and the half-handle forming position differ significantly, leading to substantial differences in their processing. In actual processing, requiring separate processing of the half-preform forming position and the half-handle forming position on a single workpiece presents at least the following problems: 1. The preform forming position and the handle forming position need to be clamped separately, which affects the machining positioning accuracy; 2. The semi-handle forming area contains multiple curved surfaces, and the processing path is complex, making it very easy for processing deviations to occur, resulting in the scrapping of the entire semi-mold lip; 3. The surface of the workpiece opposite to the forming position of the third half handle is an arc surface, which makes it difficult to clamp relatively stably. As a result, the force on the workpiece during processing is small, the tool feed is small, and the processing efficiency is low. 4. When the molding of the mold lip is modified, the entire mold lip needs to be replaced, which increases manufacturing costs and production time, and restricts product diversity. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a combined mold lip and a preform mold for handles.

[0004] The technical solution adopted by this invention to solve its technical problem is: The preform mold's combined mold lip includes two mirror-symmetrical half-molding lip components. Each half-molding lip component includes a half-molding lip base and a half-molding lip insert fixed to the half-molding lip base. The half-molding lip insert and the half-molding lip base are configured to define the forming surface of the half-molding lip component. The half-molding lip insert and the half-molding lip base have two mutually perpendicular first and second dividing surfaces. The first dividing surface is parallel to the mold lip parting surface, and the second dividing surface is parallel to the axis of the combined mold lip, or the axis of the combined mold lip lies within the second dividing surface. The angle of the main forming surface corresponding to the half-molding lip insert is 45° to 120°, preferably 90°.

[0005] In this invention, the half-mold lip insert defines the half-handle forming and the half-preform forming corresponding to a portion of the half-handle, the half-mold lip base defines the other portion of the half-preform forming, and the two half-mold lip components are configured to define the handle forming and the preform forming corresponding to the handle.

[0006] In this invention, the inner side of the semi-mold lip base has a base parting surface, a base forming surface, and a base recess; the inner side of the semi-mold lip insert has an insert parting surface and an insert forming surface, and the insert parting surface has a semi-handle forming position that defines the semi-handle forming; the semi-mold lip insert is adaptedly disposed in the base recess, the base parting surface and the insert parting surface are flush and form the mold lip parting surface, and the base forming surface and the insert forming surface form a semi-preform forming position that defines the semi-preform forming.

[0007] In this invention, the two half-die lip components are connected along the parting surface of the die lip, the two half-handle forming positions constitute a handle forming position, the two half-preform forming positions constitute a preform forming position, and the handle forming position is connected to the preform forming position.

[0008] In this invention, the preform forming position includes a preform mouth forming position and a preform body forming position, and the handle forming position is connected to the preform body forming position.

[0009] In this invention, the outer side of the half-mold lip insert is provided with an insert pin hole, and the recessed part of the base is provided with a base pin hole corresponding to the insert pin hole. The half-mold lip insert and the half-mold lip base are positioned by a positioning pin inserted between the insert pin hole and the base pin hole.

[0010] In this invention, the semi-molding lip base and the semi-molding lip insert are detachably connected by a first connecting structure; or, the semi-molding lip base and the semi-molding lip insert are combined and connected by welding.

[0011] In this invention, the semi-mold lip insert includes an insert base and a semi-handle forming insert. The inner side of the insert base is provided with an insert parting surface recess. The semi-handle forming insert is adapted to be disposed in the insert parting surface recess to form the semi-handle forming position.

[0012] In this invention, the insert base and the semi-handle molded insert are detachably connected by a second connecting structure; or, the insert base and the semi-handle molded insert are combined and connected by welding.

[0013] Based on the combined mold lip of the handle preform mold provided above, the present invention also provides a preform mold including at least one molding component, the molding component including a mold core, a mold cavity and a mold lip defining at least part of the preform molding, characterized in that the mold lip is a combined mold lip of any of the above.

[0014] The beneficial effects of this invention are as follows: By distributing the preform forming positions to the preform base and the preform insert, the base forming surface on the preform base and the insert forming surface on the preform insert can be processed independently. The corresponding forming and assembly surfaces can be processed in their respective clamping, reducing the processing difficulty of each forming surface and avoiding the impact of multiple clamping operations on processing positioning. The preform insert has a complete half-handle forming position, so processing deviations will not affect the preform base, reducing scrap losses caused by handle forming position processing failures. The handle forming position is planar on both the preform insert processing surface and its opposite surface, allowing for good positioning and fixation during handle forming position processing. This provides more accurate positioning and sufficient locking force, reducing the possibility of processing failures and improving processing accuracy and efficiency. When it is necessary to change part of the preform structure, only the preform insert needs to be replaced, without remaking the entire preform. For example, changing the handle shape molded by the preform insert, or switching between having and not having a molded handle, etc. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the combined mold lip; Figure 2 This is a structural schematic diagram of the semi-molded lip component; Figure 3 This is a schematic diagram of the inner structure of the semi-molded lip base; Figure 4 This is a schematic diagram of the inner structure when the insert base and the half-handle forming insert are connected in a detachable manner in a half-mold lip insert. Figure 5 This is a schematic diagram of the outer structure of the half-molded lip insert; Figure 6 This is a schematic diagram of the inner structure when the insert base and the half-handle forming insert are combined and connected by welding in the half-mold lip insert. Figure 7 This is a schematic diagram of the molded component. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0017] like Figures 1 to 6As shown, this embodiment discloses a combined mold lip for a handle preform mold, including two mirror-symmetrical half-molding lip components 1. The contact surface of the two half-molding lip components 1 is the mold lip parting surface 2 of both. Each half-molding lip component 1 includes a half-molding lip base 3 and a half-molding lip insert 4 fixed to the half-molding lip base 3. The half-molding lip insert 4 and the half-molding lip base 3 have two mutually perpendicular first dividing surfaces 6 and second dividing surfaces 7. The first dividing surface 6 is parallel to the mold lip parting surface 2, and the second dividing surface 7 is parallel to the axis of the combined mold lip, or the axis of the combined mold lip is located within the second dividing surface 7. The angle of the forming surface corresponding to the half-molding lip insert 4 is 45~120°. In this embodiment, the angle of the main forming surface corresponding to the half-molding lip insert 4 is 90°, where the main forming surface corresponding to the half-molding lip insert 4 is the forming surface that defines the main body of the preform, and the angle of the main forming surface corresponding to the half-molding lip component 1 is 180°.

[0018] The half-mold lip insert 4 defines the forming of half-handle and half-preform corresponding to part of the half-handle, and the half-mold lip base 3 defines the forming of another part of the half-preform. The two half-mold lip components 1 are configured to define the forming of handle and the forming of preform corresponding to handle. The inner side of the half-mold lip base 3 has a base parting surface 31, a base forming surface 32 and a base recess 33. The base parting surface 31 is part of the mold lip parting surface 2 constituting the half-mold lip component 1. The base forming surface 32 is used to define part of the preform opening and part of the preform body. The base recess 33 is used to accommodate the half-mold lip insert 4.

[0019] The inner side of the semi-mold lip insert 4 has an insert forming surface 41 and an insert parting surface 42. The insert forming surface 41 is used to define part of the blank opening and part of the blank body forming. The insert parting surface 42 is part of the mold lip parting surface 2 constituting the semi-mold lip component 1. The insert parting surface 42 has a semi-handle forming position 43 for defining part of the handle forming. The semi-mold lip insert 4 is adaptedly disposed in the base recess 33. The insert parting surface 42 is flush with the base parting surface 31 to form the mold lip parting surface 2 of the semi-mold lip component 1. The insert forming surface 41 and the base forming surface 32 are joined to form a semi-preform forming position 5 for defining part of the blank opening forming and part of the blank body forming.

[0020] Two half-die lip components 1 fit together along the die lip parting surface 2, two half-handle forming positions 43 form a handle forming position, two half-preform forming positions 5 form a preform forming position, and the handle forming position is connected to the preform forming position.

[0021] The preform forming position 5 includes a preform opening forming position 51 for defining part of the preform opening and a preform body forming position 52 for defining part of the preform body. The handle forming position 43 is connected to the preform body forming position 52. The two half mold lip components 1 are joined together along the mold lip parting surface 2. The two preform opening forming positions 51 constitute the preform opening forming position, and the two preform body forming positions 52 constitute the preform body forming position. The handle forming position is connected to the preform body forming position.

[0022] This embodiment distributes the preform forming positions 5 to the mold lip base 3 and the mold lip insert 4, allowing the base forming surface 32 on the mold lip base 3 and the insert forming surface 41 on the mold lip insert 4 to be processed independently. Both the base forming surface 32 and the insert forming surface 41 have an angle of 90°. Compared to the prior art where the preform forming positions 5 are processed together with a curved surface angle of 180°, the processing difficulty is greatly reduced. During processing, only a portion of the preform forming positions 5 and the handle forming positions 43 need to be processed on the mold lip insert 4, while the other portion is processed on the mold lip base 3. The mold lip base 3 and the mold lip insert 4 are processed separately and then combined to form complete preform forming positions 5 and handle forming positions 43. This method eliminates the need to process both preform forming positions 5 and handle forming positions 43 simultaneously on a single workpiece, reducing processing difficulty, simplifying the entire process, and improving processing efficiency and accuracy.

[0023] In this embodiment, the half-mold lip base 3 is provided with a base cooling water channel for cooling the base molding surface 32, and the half-mold lip insert 4 is provided with an insert cooling water channel for cooling the insert molding surface 41 and the half-handle molding position 43. The base cooling water channel and the insert cooling water channel are connected. The half-mold lip base 3 is provided with an inlet hole and an outlet hole for the cooling medium to enter and exit.

[0024] In this embodiment, there are multiple ways to combine the semi-molded lip base 3 and the semi-molded lip insert 4. Here, two specific combinations are provided: 1. The half-die lip base 3 and the half-die lip insert 4 adopt a detachable combination structure. Specifically, the half-die lip insert 4 is provided with an insert pin hole 44 on its outer side, and the base recess 33 is provided with a base pin hole 34 corresponding to the insert pin hole 44. The half-die lip insert 4 and the half-die lip base 3 are positioned by inserting a positioning pin into the insert pin hole 44 and the base pin hole 34. The half-die lip insert 4 is provided with a first insert connecting hole 45, and the base recess 33 is provided with a base connecting hole 35 corresponding to the first insert connecting hole 45. The half-die lip insert 4 and the half-die lip base 3 are locked together by a first connecting structure that engages with the first insert connecting hole 45 and the base connecting hole 35. The first connecting structure can be made of bolts, screws or other fasteners, so that the half-die lip base 3 and the half-die lip insert 4 can be detachably connected.

[0025] When assembling the half-die lip base 3 and the half-die lip insert 4, the positioning pin can be first inserted into the insert pin hole 44 or the base pin hole 34, and the half-die lip insert 4 and the base recess 33 of the half-die lip base 3 can be aligned and assembled. The positioning pin is then inserted into the base pin hole 34 or the insert pin hole 44, thereby completing the positioning of the half-die lip insert 4 and the half-die lip base 3. Then, the connecting fastener is screwed into the first insert connecting hole 45 and the base connecting hole 35 to lock the half-die lip insert 4 and the half-die lip base 3 together. When the half-die lip insert 4 needs to be disassembled, simply unscrew the connecting fastener to remove the half-die lip insert 4 from the base recess 33 of the half-die lip base 3.

[0026] The half-mold lip component 1 of this combined structure allows for the replacement of the half-mold lip insert 4. For a series of bottle preforms with the same preform body molding structure but different handle molding structures, different styles of handle preforms can be prepared by replacing the half-mold lip insert 4. When replacing the half-mold lip insert 4, it is only necessary to remove the original half-mold lip insert 4 and install the other half-mold lip insert 4, which makes the replacement highly convenient.

[0027] 2. The semi-molding lip base 3 and the semi-molding lip insert 4 are joined by welding. Specifically, the semi-molding lip base 3 and the semi-molding lip insert 4 are fixedly connected by brazing. This connection method eliminates the need for connecting structures within the semi-molding lip base 3 and the semi-molding lip insert 4, allowing for greater space for the internal cooling water channels and more flexible configuration, resulting in a more ideal cooling effect. The brazed connection between the semi-molding lip base 3 and the semi-molding lip insert 4 results in a high degree of tightness, minimizing the impact of the joint line on the molded preform and producing excellent appearance quality.

[0028] In this embodiment, the semi-handle forming position 43 can be formed in various ways, and the following two methods are specifically provided here: 1. The half handle forming position 43 is obtained directly on the parting surface 42 of the half mold lip insert 4 by machining. The half mold lip insert 4 is an integral structure.

[0029] 2. The semi-mold lip insert 4 includes an insert base 46 and a semi-handle forming insert 47. The inner side of the insert base 46 is provided with an insert parting surface recess 471. The semi-handle forming insert 47 is adaptedly disposed in the insert parting surface recess 471 to form a semi-handle forming position 43. During processing, the insert parting surface recess 471 is first machined on the insert parting surface 42, and then the semi-handle forming insert 47 is fixed in the insert parting surface recess 471. The outer side wall of the semi-handle forming insert 47 and the insert parting surface recess 471 together define the semi-handle forming position 43.

[0030] Similarly, the combination between the insert base 46 and the semi-handle molding insert 47 can be either detachable or welded. When the insert base 46 and the semi-handle molding insert 47 are detachably connected, the semi-handle molding insert 47 is provided with a second insert connection hole 472, and the insert parting surface recess 471 is provided with a third insert connection hole 461 corresponding to the second insert connection hole 472. The insert base 46 and the semi-handle molding insert 47 are locked together through a second connection structure into the second insert connection hole 472 and the third insert connection hole 461. At this time, the semi-handle molding insert 47 can be disassembled and replaced. For a series of bottle preforms with the same outer molding surface but different inner molding surfaces, only the semi-handle molding insert 47 needs to be replaced to prepare different styles of handle preforms, and the insert base 46 can be universal.

[0031] Of course, the insert base 46 and the semi-handle forming insert 47 can also be connected by welding. Specifically, the semi-handle forming insert 47 and the recessed parting surface 471 are connected by low-temperature brazing with tin-based solder. After the insert base 46 and the semi-handle forming insert 47 are fixed by brazing, they form an integral structure that cannot be separated. When the two are fixed by brazing, there is no need to open connection holes in the insert base 46 and the semi-handle forming insert 47. The cooling water channel used to cool the preform handle is not obstructed by connection holes, allowing for more flexible design and thus achieving a more ideal cooling effect.

[0032] Based on the combined die lip of the handle preform mold provided in this embodiment, this embodiment also discloses a preform mold, such as... Figure 7 As shown, the preform mold includes at least one molding component, which includes a mold core 8, a mold cavity 9, and a mold lip 10 defining at least part of the preform molding, wherein the mold lip 10 is the aforementioned combined mold lip.

[0033] The above description is only a preferred embodiment of the present invention. Any technical solution that achieves the purpose of the present invention by essentially the same means is within the protection scope of the present invention.

Claims

1. A combined mold lip for a preform mold, comprising two mirror-symmetrical half-molding lip components, characterized in that, The semi-molded lip component includes a semi-molded lip base and a semi-molded lip insert fixed to the semi-molded lip base. The semi-molded lip insert and the semi-molded lip base are configured to define the molding surface of the semi-molded lip component. The semi-molded lip insert defines the molding of a half-handle and the molding of a half-preform corresponding to a portion of the half-handle. The semi-molded lip base defines the molding of another portion of the half-preform. The two semi-molded lip components are configured to define the molding of the handle and the molding of the preform corresponding to the handle.

2. The combined die lip of the preform mold according to claim 1, characterized in that, The inner side of the semi-molded lip base has a base parting surface, a base forming surface, and a base recess; The inner side of the semi-mold lip insert has an insert parting surface and an insert forming surface, and the insert parting surface has a semi-handle forming position that defines the semi-handle forming. The semi-mold lip insert is adapted to be disposed in the recessed position of the substrate. The parting surface of the substrate and the parting surface of the insert are flush and form the parting surface of the mold lip. The forming surface of the substrate and the forming surface of the insert form the semi-preform forming position that defines the semi-preform forming.

3. The combined die lip of the preform mold according to claim 2, characterized in that, The two half-die lip components are joined together along the parting surface of the die lip, the two half-handle forming positions constitute the handle forming position, the two half-preform forming positions constitute the preform forming position, and the handle forming position is connected to the preform forming position.

4. The combined die lip of the preform mold according to claim 3, characterized in that, The preform forming position includes a preform mouth forming position and a preform body forming position, and the handle forming position is connected to the preform body forming position.

5. The combined die lip of the preform mold according to claim 2, characterized in that, The outer side of the half-mold lip insert is provided with an insert pin hole, and the recessed part of the base is provided with a base pin hole corresponding to the insert pin hole. The half-mold lip insert and the half-mold lip base are positioned by a positioning pin inserted between the insert pin hole and the base pin hole.

6. The combined die lip of the preform mold according to any one of claims 1-5, characterized in that, The semi-molding lip base and the semi-molding lip insert are detachably connected by a first connecting structure; or, the semi-molding lip base and the semi-molding lip insert are combined and connected by welding.

7. The combined die lip of the preform mold according to claim 1, characterized in that: The semi-mold lip insert includes an insert base and a semi-handle forming insert. The inner side of the insert base is provided with an insert parting surface recess. The semi-handle forming insert is adapted to be disposed in the insert parting surface recess to form a semi-handle forming position.

8. The combined die lip of the preform mold according to claim 7, characterized in that, The insert base and the semi-handle molded insert are detachably connected by a second connecting structure; or, the insert base and the semi-handle molded insert are combined and connected by welding.

9. A preform mold, comprising at least one forming component, said forming component including a mold core, a mold cavity, and a mold lip defining at least a portion of the preform forming, characterized in that, The die lip is the combined die lip as described in any one of claims 1-8.

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