A skin care pump core connecting rod mold

Abstract

This utility model provides a mold for a skincare pump core connecting rod, relating to the mold field, including: an upper mold assembly and a lower mold assembly. The upper mold assembly contains an upper mold core, and the lower mold assembly contains a lower mold core. After the upper and lower mold cores are closed, they form the cavity of the molded product. The sealing mating surface of the cavity adopts an integrated mold core structure; a concealed sliding block structure; a three-plate mold dot gluing system; a parting drive mechanism, including a nylon expansion plug located on the parting surface of the upper mold and an external pull rod for driving the parting of the lower mold; and an ejection mechanism. This application, through the integrated sealing structure of the mold core, ensures precise fit between the angled edges and surfaces at the water-sealing point of the cavity, solving the problem of the integrity of the head water-sealing ring and avoiding water-sealing failure. The concealed sliding block structure enables interference-free demolding at the undercut position, preventing the product from falling and getting stuck in the slider or sticking to the mold. The three-plate mold dot gluing system injects glue from the top, combined with a precise parting drive and ejection mechanism, effectively improving production efficiency, reducing the defect rate, and meeting the needs of high-precision and high-efficiency production.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a mold for a skin care pump core connecting rod. Background Technology

[0002] In the mold manufacturing industry, polypropylene (PP) is widely used in the production of various injection-molded products due to its excellent comprehensive properties, such as low density, good chemical stability, and wide operating temperature range. From daily necessities to industrial parts, PP products occupy a significant market share thanks to their cost-effectiveness.

[0003] However, traditional mold technology faces numerous challenges in the production of precision injection molded parts such as skincare pump core connecting rods. Taking a skincare pump core connecting rod with dimensions of only D3.46mm x 9.18mm as an example, the bevel and surface at the D3.46mm dimension have strict requirements for water sealing, and the injection point is fixed at the top. Due to the small size of the product, conventional mold structures cannot guarantee the integrity of the water-sealing ring at the head, easily leading to water-sealing failure. Furthermore, during demolding, the product is highly susceptible to falling and getting stuck in the slider or sticking to the mold surface, affecting production efficiency and potentially causing product damage, increasing the defect rate.

[0004] Therefore, a skin care pump core connecting rod mold is proposed to meet the production requirements of high precision and high efficiency. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by employing an integrated mold core sealing structure to ensure precise fit between the angles and surfaces at the cavity water seal, thus resolving the issue of the integrity of the head water seal ring and preventing water seal failure. The concealed sliding block structure enables interference-free demolding at the undercut position, preventing products from falling and getting stuck in the slider or sticking to the mold. The three-plate mold point gluing system, with top-mounted gluing and precise parting drive and ejection mechanism, effectively improves production efficiency, reduces the defect rate, and meets the demands of high-precision, high-efficiency production.

[0006] In order to solve the above-mentioned technical problems, the present invention solves the problems of difficulty in ensuring the integrity of the head sealing ring and easy jamming or sticking to the mold during demolding due to the small size of the original product and the presence of an undercut.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A skincare pump core connecting rod mold, comprising:

[0009] The upper mold assembly and the lower mold assembly are provided. The upper mold assembly has an embedded upper mold core, and the lower mold assembly has an embedded lower mold core. After the upper mold core and the lower mold core are closed, they form the cavity of the molded product. The sealing mating surface of the cavity adopts an integrated mold core structure.

[0010] A concealed sliding block structure is provided inside the lower mold core for demolding the undercut part of the product;

[0011] The three-plate die-point gluing system has gluing points located at the top of the product.

[0012] The parting drive mechanism includes a nylon expansion plug located on the parting surface of the upper mold and an external pull rod that drives the lower mold to part.

[0013] Ejection mechanism, including ejector pins, is used to eject the product from the lower mold core.

[0014] Preferably, the water-sealing part of the integrated structure has an angle and a surface to meet the water-sealing requirements.

[0015] Preferably, the upper mold assembly includes plate 1, plate 2 and plate 3 in sequence, and the lower mold assembly includes plate 4, plate 5, plate 6, plate 7, plate 8, plate 9 and plate 10 in sequence.

[0016] Preferably, the concealed sliding block structure includes a slider, hook legs fixed to the number plate, and a shovel that drives the slider. The slider is symmetrically arranged on the number plate. When the mold is opened, the outer pull rod drives the number plate to move, so that the slider slides obliquely along the hook legs and disengages from the product's undercut position.

[0017] Preferably, the flow channel of the three-plate mold injection system passes through the upper mold assembly, and its injection port is located at the top of the number plate and communicates with the cavity.

[0018] Preferably, the nylon expansion plug is disposed between plates 3, 4 and 5, and elastic adhesive is disposed between plates 2 and 3.

[0019] Preferably, the ejector pin of the ejection mechanism penetrates vertically through the lower mold core, and the outline of its ejection end face matches the bottom surface of the product.

[0020] Preferably, plate No. 8 and plate No. 9 in the lower mold assembly constitute an ejector plate group, and the ejector plate group is provided with a return spring for driving the reset.

[0021] Preferably, the upper mold assembly is provided with an upper mold guide post and a small tie rod, and the length of the outer tie rod is greater than the mold opening stroke, which is used to control the timing of the lower mold assembly.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The skincare pump core connecting rod mold provided in this application, through an integrated mold core sealing structure, ensures precise fit between the beveled angle and surface at the cavity water seal, solving the problem of the integrity of the head water seal ring and avoiding water seal failure; the concealed sliding block structure enables interference-free demolding at the undercut position, preventing the product from falling and getting stuck in the sliding block or sticking to the mold; the three-plate mold point gluing system glues from the top, combined with precise parting drive and ejection mechanism, effectively improving production efficiency, reducing the defect rate, and meeting the needs of high-precision and high-efficiency production. Attached Figure Description

[0024] 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.

[0025] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0026] Figure 2 This is a frontal cross-sectional view of the present invention.

[0027] Figure 3 This is a schematic diagram of the first stage of the mold-making process of this utility model;

[0028] Figure 4 This is a schematic diagram of the second stage of the mold-making process of this utility model;

[0029] Figure 5 This is a schematic diagram of the third stage in the mold-making process of this utility model;

[0030] Figure 6 This is a structural diagram of the product in the fourth stage of the present invention, in the ejected state.

[0031] Figure 7 This is a schematic diagram of the concealed sliding block structure of this utility model;

[0032] Figure 8 This is a schematic diagram of the product structure of this utility model.

[0033] Drawing number explanation: 1. Upper mold assembly; 11. Upper mold core; 2. Lower mold assembly; 21. Lower mold core; 3. Concealed sliding block structure; 31. Slider; 32. Hook leg; 33. Pusher; 4. Three-plate mold point glue injection system; 5. External tie rod; 6. Nylon expansion plug; 7. Ejector pin; 8. Upper mold guide pillar; 9. Small tie rod; 10. Return spring. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings.

[0035] 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.

[0036] 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.

[0037] 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

[0038] Please see Figure 1-8 A skincare pump core connecting rod mold includes: an upper mold assembly 1 and a lower mold assembly 2, wherein the upper mold assembly 1 is embedded with an upper mold core 11, and the lower mold assembly 2 is embedded with a lower mold core 21. After the upper mold core 11 and the lower mold core 21 are closed, they form the cavity of the molded product. The sealing mating surface of the cavity adopts an integral mold core structure; a concealed sliding block structure 3 is provided in the lower mold core 21 for demolding the undercut position of the product; a three-plate mold point glue injection system 4, wherein the glue injection point is located at the top of the product; a parting drive mechanism, including a nylon expansion plug 6 provided on the parting surface of the upper mold and an external pull rod 5 for driving the parting of the lower mold; and an ejection mechanism, including an ejector pin 7, for ejecting the product away from the lower mold core 21.

[0039] The skin care pump core connecting rod mold of this application is mainly composed of upper mold assembly 1, upper mold core 11, lower mold assembly 2, lower mold core 21, concealed sliding block structure 3, three-plate mold point glue injection system 4, external pull rod 5, ejector pin 7 and lower mold core 21, etc. The following is a detailed description of the structure and working principle.

[0040] The upper mold assembly 1 is composed of plates 1, 2, and 3 stacked sequentially, with an embedded upper mold core 11. Plate 3 has a glue inlet at its top, which connects to the flow channel of the three-plate mold glue inlet system 4. The flow channel runs through plates 1, 2, and 3, ensuring that molten glue enters from the top of the product. The upper mold assembly 1 is equipped with upper mold guide pillars 8 and small tie rods 9 for guiding during mold closing and controlling the mold opening sequence.

[0041] The lower mold assembly 2 is composed of plates 4, 5, 6, 7, 8, 9, and 10 stacked sequentially, with an embedded lower mold core 21. A concealed sliding block structure 3 is provided between plates 4 and 5, and plates 8 and 9 form an ejector plate assembly. A return spring 10 is installed at the bottom.

[0042] The concealed sliding block structure 3 includes a sliding block 31 symmetrically arranged on plate 4, a hook leg 32 fixed on plate 5, and a shovel 33 that drives the sliding block. The sliding block 31 cooperates with the lower mold core 21 to form the cavity of the undercut position of the product. When the mold is opened, the outer pull rod 5 drives plate 4 to move, and the sliding block 31 slides obliquely along the hook leg 32 to realize the demolding of the undercut position of the product.

[0043] The parting drive mechanism consists of a nylon expansion plug 6, an outer tie rod 5, and a small tie rod 9 located on the parting surface of the upper mold. The nylon expansion plug 6 is installed between plates 3, 4, and 5, and elastic rubber is installed between plates 2 and 3 to control the parting sequence. (PL1-PL4 represent the parting action sequence). The length of the outer tie rod 5 is greater than the mold opening stroke, and it is used to drive the parting sequence of the lower mold assembly.

[0044] The ejection mechanism includes ejector pins 7 that penetrate vertically through the lower mold core 21. The ejector pin end face profile matches the bottom surface of the product to ensure uniform force on the product during ejection. Ejector plate group plates 8 and 9 achieve automatic reset during mold closing via return springs 10.

[0045] The cavity sealing mating surface formed after the upper mold core 11 and the lower mold core 21 are machined as a single piece. The water sealing part is designed with a specific bevel angle and surface, such as a 30° bevel angle and a precision ground surface, to meet the water sealing requirements at the D3.46MM size and avoid melt leakage.

[0046] The slider 31 of the concealed sliding block demolding 3 is fixed to plate 4, and the hook leg 32 is fixed to plate 5. When the mold is opened, the plate 4 moves and drives the slider to slide along the oblique trajectory of the hook leg, so that the slider is disengaged from the undercut position of the product, and the demolding action is achieved without ejection interference.

[0047] The nylon expansion plug 6 of the parting drive mechanism works with the elastic rubber to ensure that plate 2 and plate 3 separate first when the mold opens. After the small pull rod 9 limits the upper mold, it opens completely. Then, the lower mold is driven to part by the outer pull rod 5, ensuring the precise sequence of actions.

[0048] Working principle

[0049] I. Mold Opening Process

[0050] Phase 1: Initial parting of upper mold component 1

[0051] When the injection molding machine (not shown in the figure) starts the mold opening action, the nylon expansion plug 6 pushes the No. 2 plate and the No. 3 plate to separate. Because the nylon expansion plug 6 between the No. 3 plate, the No. 4 plate and the No. 5 plate restricts their movement, the elastic rubber between the No. 2 plate and the No. 3 plate provides the separation power. At this time, the flow channel of the three-plate mold point injection system 4 begins to separate from the cavity.

[0052] Phase 2: Upper mold component 1 fully opened

[0053] When plate 2 and plate 3 separate to the limit distance of small tie rod 9, small tie rod 9 restricts their continued movement, upper mold assembly 1 is fully opened, and the waste material in the flow channel is initially separated from the product.

[0054] Phase 3: Parting of lower mold assembly 2 and demolding of slider 31

[0055] Since the length of the outer tie rod 5 is greater than the mold opening stroke, when the injection molding machine continues to open the mold, the outer tie rod 5 pulls plate 4 backward, causing the PL4 parting surface to open.

[0056] When plate number 4 moves, slider 31, which is fixed to plate number 4, slides obliquely along hook leg 32, which is fixed to plate number 5. Slider 31 opens to both sides, disengaging from the undercut position of the product, thus completing the demolding of the undercut position. At this time, the product shrinks due to cooling and is fixed on the lower mold core 21.

[0057] Phase 4: Product Ejection

[0058] The injection molding machine ejector roller (not shown in the figure) pushes the ejector plate group of plate 8 and plate 9 of the lower mold assembly 2, which drives the ejector pin 7 to push the product away from the lower mold core 21, thus completing the part removal.

[0059] II. Mold Closing Process

[0060] Phase 1: Resetting the ejector plate assembly

[0061] When the mold begins to close, the return spring 10 at the bottom of plates 8 and 9 of the ejector plate assembly drives the ejector pin 7 to return to its original position first, ensuring that the ejector pin does not interfere with the mold closing action.

[0062] Phase 2: Initial mold assembly of upper mold component 1 and lower mold component 2.

[0063] Plates 2 and 3 are molded together first under the thrust of the injection molding machine, followed by plates 4 and 5. At this time, hook leg 32 is inserted into the mating groove of slider 31, and slider is locked by shovel 33 to ensure cavity sealing.

[0064] Phase 3: Mold Completion

[0065] Each mold plate is closed in sequence, the upper mold core and the lower mold core close to form a complete cavity, the nylon expansion plug 6 and the elastic rubber are reset, ready for the next injection molding cycle.

[0066] 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 skin care pump core connecting rod, characterized in that, include: The upper mold assembly (1) and the lower mold assembly (2) are provided. The upper mold assembly (1) is embedded with an upper mold core (11), and the lower mold assembly (2) is embedded with a lower mold core (21). After the upper mold core (11) and the lower mold core (21) are closed, they form the cavity of the molded product. The sealing mating surface of the cavity adopts an integral mold core structure. The concealed sliding block structure (3) is located inside the lower mold core (21) and is used for demolding the undercut part of the product; The three-plate die-point glue injection system (4) has glue injection points located at the top of the product; The parting drive mechanism includes a nylon expansion plug (6) located on the parting surface of the upper mold and an outer tie rod (5) for driving the parting of the lower mold. The ejection mechanism includes ejector pins (7) for ejecting the product away from the lower mold core (21).

2. The skin care pump core connecting rod mold according to claim 1, characterized in that: The water-sealing part of the integrated structure is provided with bevels and surfaces to meet the water-sealing requirements.

3. The skin care pump core connecting rod mold according to claim 1, characterized in that: The upper mold assembly (1) includes plate 1, plate 2 and plate 3 in sequence, and the lower mold assembly (2) includes plate 4, plate 5, plate 6, plate 7, plate 8, plate 9 and plate 10 in sequence.

4. The skin care pump core connecting rod mold according to claim 1, characterized in that: The concealed sliding block structure (3) includes a slider (31), a hook leg (32) fixed to plate 5, and a shovel (33) that drives the slider (31). The slider (31) is symmetrically arranged on plate 4. When the mold is opened, the outer pull rod (5) drives plate 4 to move, so that the slider (31) slides obliquely along the hook leg (32) and disengages from the product undercut position.

5. The skin care pump core connecting rod mold according to claim 1, characterized in that: The flow channel of the three-plate mold injection system (4) passes through the upper mold assembly (1), and its injection port is located at the top of plate No. 3 and communicates with the cavity.

6. The skin care pump core connecting rod mold according to claim 2, characterized in that: The nylon expansion plug (6) is located between plates 3, 4 and 5, and elastic adhesive is provided between plates 2 and 3.

7. The skin care pump core connecting rod mold according to claim 1, characterized in that: The ejector pin (7) of the ejector mechanism penetrates vertically through the lower mold core (21), and its ejector end face profile matches the bottom surface of the product.

8. A skin care pump core connecting rod mold according to claim 3, characterized in that: Plate 8 and Plate 9 in the lower mold assembly (2) constitute an ejector plate group. The ejector plate group is provided with a reset spring (10) for driving reset.

9. A skin care pump core connecting rod mold according to claim 1, characterized in that: The upper mold assembly (1) is provided with an upper mold guide post (8) and a small tie rod (9). The length of the outer tie rod (5) is greater than the mold opening stroke and is used to control the parting sequence of the lower mold assembly (2).

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