Die for double-tube bottle pump head cap

Abstract

The utility model provides a mould for head caps of double-tube bottles and pumps, which relates to the field of moulds, and comprises an upper mould assembly, a lower mould assembly and an ejection mechanism, the lower mould assembly is provided with a layered demoulding structure and comprises a lower mould punch I, a lower mould punch II and an ejector sleeve thimble which are matched with a glue position surface of an inner cavity of a product, the first lower die punch and the second lower die punch are demoulded in stages through a linkage mechanism. The mold is provided with an arc core pulling mechanism used for achieving arc track core pulling. 3D printing conformal cooling waterways are arranged in the first lower die punch and the second lower die punch. Demolding is completed through three actions of the layered demolding structure, the arc core pulling mechanism is arranged, the requirement of a special product for an arc-shaped liquid outlet channel is met, the problem of product damage possibly caused by one-time demolding of a traditional mold is solved, and the rejection rate is reduced; the 3D printing conformal cooling water channel can be closer to the forming surface of a product, the more uniform and faster cooling effect is achieved, and the forming period is shortened.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a mold for a cap for a double-tube bottle pump. Background Technology

[0002] Dual-tube pump caps are widely used in the packaging of cosmetics, pharmaceuticals, and other products. Their structural design and molding quality directly affect the user experience and sealing performance. Existing molds for dual-tube pump caps face several technical bottlenecks in production: First, traditional molds have a single, straight-through design for the liquid outlet channel, which is insufficient to meet the needs of special products requiring arc-shaped outlet channels, limiting product diversification and functional expansion. Second, the lower mold's demolding structure is complex and lacks a layered demolding mechanism, making it prone to product deformation and breakage due to stress concentration during demolding, reducing yield. Third, the core-pulling mechanism typically only supports linear motion and cannot achieve complex arc-shaped core-pulling actions, resulting in molding defects such as material shortages and surface depressions in products with arc-shaped undercut structures. Fourth, the mold's cooling water channel layout is unreasonable, with cooling blind spots or uneven coolant flow rates, leading to localized overheating and excessively long cooling times. This not only prolongs the production cycle but also causes dimensional deviations and internal stress residues due to inconsistent cooling shrinkage, severely impacting production efficiency and product quality.

[0003] With the increasing market demand for personalized and precision caps for double-tube bottle pumps, and in order to solve the aforementioned technical challenges and meet the needs of high-end and customized production, a mold for caps of double-tube bottle pumps is proposed. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by employing a layered demolding structure that completes demolding in three separate actions, along with an arc-shaped core-pulling mechanism. This meets the requirements of special products for arc-shaped liquid outlet channels, avoiding product damage that may occur with traditional molds that require only one demolding, thus reducing the scrap rate. Furthermore, the 3D-printed conformal cooling water channel can be closer to the product's molding surface, achieving a more uniform and faster cooling effect and shortening the molding cycle.

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

[0006] A mold for a cap of a double-tube bottle pump includes an upper mold assembly, a lower mold assembly, and an ejection mechanism. The lower mold assembly is provided with a layered demolding structure, including a lower mold punch one, a lower mold punch two, and an ejector pin that match the inner cavity of the product. The lower mold punch one and the lower mold punch two are demolded in stages through a linkage mechanism.

[0007] The mold is equipped with an arc core-pulling mechanism to achieve arc trajectory core pulling;

[0008] The lower die punch one and lower die punch two are equipped with 3D printed conformal cooling water channels, which are distributed along the contour of the punch forming surface.

[0009] Preferably, the layered demolding structure completes demolding in three actions: first, the lower die punch two is separated by the linkage mechanism; second, the lower die punch one is separated by the linkage mechanism; and third, the product is ejected by the ejector pin.

[0010] Preferably, the linkage mechanism is a buckle structure, including a first buckle and a second buckle, which are respectively connected to the lower die punch one and the lower die punch two.

[0011] Preferably, the arc core-pulling mechanism consists of a slider seat, slider insert three, slider insert two, slider insert one, and an inclined guide post. Slider insert three is connected to slider seat, and slider insert one is connected to slider insert two.

[0012] Preferably, the slider seat is fixedly connected to the inclined guide post, which is located on plate 2 of the lower mold assembly. During mold opening, the slider seat is driven to slide laterally through the PL1 parting surface.

[0013] Preferably, the 3D printed conformal cooling water channel is located inside the lower die punch.

[0014] Preferably, the ejection mechanism includes an ejector plate and a return spring, wherein the ejector plate automatically returns to its original position when the mold is closed by resetting the return spring.

[0015] Preferably, the slider insert three and the slider insert one are connected by a sliding fit.

[0016] Preferably, the head of the ejector pin is made of beryllium copper alloy.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The mold for the cap of the double-tube bottle pump provided in this application completes demolding in three steps through a layered demolding structure and an arc-shaped core-pulling mechanism, which meets the needs of special products for arc-shaped liquid outlet channels, avoids the product damage problem that may be caused by one-time demolding of traditional molds, and reduces the scrap rate; the 3D printed conformal cooling water channel can be closer to the product molding surface, achieve a more uniform and faster cooling effect, and shorten the molding cycle.

[0019] The beryllium copper alloy ejector pins in this application achieve rapid cooling, reducing surface defects and internal stress in the product; the linkage mechanism adopts a snap-fit ​​structure to ensure the accuracy and stability of the demolding action; the sliding fit connection of the arc core-pulling mechanism ensures smooth movement and reduces damage to mold components. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0022] Figure 2 This is a top view of the lower mold assembly of this utility model;

[0023] Figure 3 This is a schematic diagram of the layered demolding structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the return structure of the arc core-pulling mechanism of this utility model;

[0025] Figure 5 This is a schematic diagram of the arc core-pulling mechanism extraction structure of this utility model;

[0026] Figure 6 This is a schematic diagram of the lower die punch structure of this utility model;

[0027] Figure 7 This is a schematic diagram of the top structure of the actuator of this utility model.

[0028] Drawing number explanations: 100, Upper mold assembly; 200, Lower mold assembly; 210, Layered demolding structure; 211, Lower mold punch one; 212, Lower mold punch two; 213, Ejector sleeve; 228, Angled guide post; 214, Linkage mechanism; 215, First locking mechanism; 216, Second locking mechanism; 220, Arc-shaped core pulling mechanism; 224, Slider seat; 225, Slider insert three; 226, Slider insert two; 227, Slider insert one; 230, 3D printed conformal cooling water channel; 300, Ejection mechanism; 310, Ejector plate; 320, Return spring. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings.

[0030] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious modifications will be apparent to those skilled in the art. The basic principles of the present invention defined in the following description can be used in other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0031] Those skilled in the art should understand that in the disclosure of this utility model, the terms "longitudinal", "lateral", "up", "down", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or position based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0032] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number. Example

[0033] Please see Figure 1-7 A mold for a cap of a double-tube bottle pump includes an upper mold assembly 100, a lower mold assembly 200, and an ejection mechanism 300. The lower mold assembly 200 is provided with a layered demolding structure 210, which includes a lower mold punch 1 211, a lower mold punch 212, and an ejector pin 213 that match the inner cavity of the product. The lower mold punch 1 211 and the lower mold punch 212 are demolded in stages through a linkage mechanism 214.

[0034] The mold is equipped with an arc core-pulling mechanism 220 to achieve arc trajectory core pulling;

[0035] The lower die punch 1 211 and lower die punch 212 are equipped with 3D printed conformal cooling water channels 230, which are distributed along the contour of the punch forming surface.

[0036] The mold for the cap of the double-tube bottle pump of this application is mainly composed of an upper mold assembly 100, a lower mold assembly 200, an ejector mechanism 300, a lower mold punch 1 211, a lower mold punch 212, an ejector pin 213, and an arc core pulling mechanism 220. The following is a detailed description of the structure and working principle.

[0037] Mold structure and working principle

[0038] The mold for the cap of the double-tube bottle pump consists of an upper mold assembly 100, a lower mold assembly 200, and an ejection mechanism 300. A mold core adapted to the product is provided between the upper mold assembly 100 and the lower mold assembly 200, which can meet the special liquid outlet channel shape requirements of the double-tube bottle emulsion cap product, giving the product two arc-shaped liquid outlet channels.

[0039] The lower mold assembly 200 is equipped with a layered demolding structure 210, including a first lower mold punch 211, a second lower mold punch 212, an inclined guide post 228, and an ejector pin 213. Demolding is achieved in stages via a linkage mechanism 214. The layered demolding structure 210 completes demolding in three actions: first, the linkage mechanism 214 drives the separation of the second lower mold punch 212; second, it drives the separation of the first lower mold punch 211; and third, the ejector pin 213 ejects the product. The linkage mechanism 214 adopts a snap-fit ​​structure, including a first snap-fit ​​215 and a second snap-fit ​​216, which are connected to the first lower mold punch 211 and the second lower mold punch 212 respectively, ensuring the accuracy and stability of the demolding action.

[0040] The arc-shaped core-pulling mechanism 220 consists of a slider seat 224, a third slider insert 225, a second slider insert 226, and a first slider insert 227, enabling arc-shaped core-pulling. The slider seat 224 is fixedly connected to the inclined guide post 228, which is located on plate number 2 of the lower mold assembly 200. During mold opening, the slider seat 224 slides laterally via the PL1 parting surface, thus completing the arc-shaped core-pulling. The third slider insert 225 and the first slider insert 227 are connected by a sliding fit to ensure smooth core-pulling operation.

[0041] The lower die punch 1 211 and the lower die punch 212 are equipped with 3D printed conformal cooling water channels 230. The water channels 230 are distributed along the contour of the punch forming surface. The 3D printed conformal cooling water channels 230 are set inside the lower die punch 1 211, which can achieve efficient cooling of the mold, improve production efficiency and product quality.

[0042] The ejection mechanism 300 includes an ejector plate 310 and a return spring 320. The ejector plate 310 is reset by the return spring 320 to achieve automatic return when the mold is closed, ensuring the normal operation of the mold.

[0043] The ejector pin 213 is made of beryllium copper alloy, which has good thermal conductivity and can achieve rapid cooling, thus compensating for the deficiency of the lower mold ejector pin being too small to be made into a cooling water channel.

[0044] Mold operation process

[0045] Mold opening process: The injection molding machine (not shown in the figure) starts to open, with the PL1 parting surface opening first. Since the inclined guide post 228 is fixed to plate 2, after the PL1 parting surface opens, the slider seat 224 slides outward under the action of the inclined guide post 228, and the arc-shaped core-pulling mechanism 220 starts operating, completing the action of the arc-shaped insert separating from the product. When the parting surface is fully open, the injection molding machine ejector roller starts operating, directly pressing against plates 8 and 9. Driven by the first locking mechanism 215, the PL2 parting surface opens by 25mm, causing the lower mold punch 212 to separate from the product. Next, the ejector roller continues pushing, and driven by the second locking mechanism 216, the PL3 parting surface opens by 25mm, causing the lower mold punch 211 to separate from the product. Finally, the ejector plate 310 continues its ejection operation under the action of the ejector roller until the product is completely ejected.

[0046] Mold closing process: When the mold closes, the ejector plate 310 is first reset by the return spring 320. The inclined guide post 228 is inserted into the lower mold slide, causing the slide seat 224 to reset, thus completing the mold closing action.

[0047] This utility model's mold for double-tube bottle pump caps effectively solves the problems of difficult demolding, inconvenient core pulling, and poor cooling effect in the production of double-tube bottle pump caps through a unique layered demolding structure 210, an arc-shaped core pulling mechanism 220, and a 3D-printed conformal cooling water channel 230. It improves production efficiency and product quality and has good application prospects.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

Claims

1. A mold for a cap on a double-tube bottle pump, comprising an upper mold assembly (100), a lower mold assembly (200), and an ejection mechanism (300), characterized in that... ； The lower mold assembly (200) is provided with a layered demolding structure (210), including a lower mold punch one (211), a lower mold punch two (212) and an ejector pin (213) that match the inner cavity of the product. The lower mold punch one (211) and the lower mold punch two (212) are demolded in stages through a linkage mechanism (214). The mold is equipped with an arc core-pulling mechanism (220) to achieve arc trajectory core pulling; The lower die punch one (211) and lower die punch two (212) are provided with 3D printed conformal cooling water channels (230), which are distributed along the contour of the punch forming surface.

2. The mold for the cap of a double-tube bottle pump according to claim 1, characterized in that: The layered demolding structure (210) completes demolding in three actions: first, the linkage mechanism (214) drives the separation of the lower die punch two (212); second, the linkage mechanism (214) drives the separation of the lower die punch one (211); and third, the ejector pin (213) ejects the product.

3. The mold for the cap of a double-tube bottle pump according to claim 2, characterized in that: The linkage mechanism (214) is a buckle structure, including a first buckle (215) and a second buckle (216), which are respectively connected to the lower die punch one (211) and the lower die punch two (212).

4. The mold for the cap of a double-tube bottle pump according to claim 3, characterized in that: The circular arc core pulling mechanism (220) consists of a slider seat (224), slider insert three (225), slider insert two (226), slider insert one (227) and inclined guide post (228). Slider insert three (225) is connected to slider seat (224), and slider insert one (227) is connected to slider insert two (226).

5. A mold for a cap on a double-tube bottle pump according to claim 4, characterized in that: The slider seat (224) is fixedly connected to the inclined guide post (228). The inclined guide post (228) is located on the No. 2 plate of the lower mold assembly (200). When the mold is opened, the slider seat (224) is driven to slide laterally through the PL1 parting surface.

6. The mold for the cap of a double-tube bottle pump according to claim 1, characterized in that: The 3D printed conformal cooling water channel (230) is located inside the lower die punch (211).

7. The mold for the cap of a double-tube bottle pump according to claim 1, characterized in that: The ejection mechanism (300) includes an ejector plate (310) and a return spring (320). The ejector plate (310) is automatically returned to its original position when the mold is closed by the return spring (320).

8. A mold for a cap on a double-tube bottle pump according to claim 4, characterized in that: The slider insert three (225) and slider insert one (227) are connected by a sliding fit.

9. A mold for a cap on a double-tube bottle pump according to claim 1, characterized in that: The head of the ejector pin (213) is made of beryllium copper alloy.

Images