Double-color bottom cover mold

Abstract

The utility model discloses a double-color bottom cover mould which comprises an upper mould assembly and a lower mould assembly, the upper mould assembly comprises a liftable and rotatable upper mould plate, the lower mould assembly comprises a lower mould plate and an auxiliary plate, the upper mould plate is provided with a first injection insert and a second injection insert, the lower mould plate is provided with a lower mould insert, sliding blocks are arranged on the two sides of the lower mould insert, and the auxiliary plate is arranged on the lower mould insert. The auxiliary plate is provided with an inclined guide column which can movably penetrate through the lower die plate and is matched with the sliding block, the first injection insert is provided with a first injection type sleeve, the second injection insert is provided with a second injection type sleeve, the first injection insert is provided with a first injection embedding head, the second injection insert is provided with a second injection embedding head, the diameter of the second injection embedding head is smaller than that of the first injection embedding head, and the inner diameter of the second injection type sleeve is smaller than that of the first injection type sleeve. The positions of the first injection insert and the second injection insert can be exchanged along with rotation of the upper mold plate, so that secondary injection is achieved, namely, independent injection molding combination of the cover body and the sealing part is achieved, the matching reliability of the bottom cover and the sealing part is guaranteed, and use is convenient. And meanwhile, the diameter of the second injection embedding head is smaller than that of the first injection embedding head, and the inner diameter of the second injection sleeve is smaller than that of the first injection sleeve, so that a sealing part can be ensured to be fixed during injection molding, and air in a second injection cavity during secondary injection molding can be conveniently squeezed out.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a double-color bottom cover mold. Background Art

[0002] The bottom cover is widely used as a bottom seal. It is usually made of plastic and has a sealing ring attached to it. However, during actual use, twisting the bottom cover can easily cause the sealing ring to fail and fall off. To ensure the sealing reliability of the bottom cover, the sealing ring and the bottom cover are currently designed to be integrated through secondary injection molding, thereby improving ease of use. However, during the secondary injection molding process, the existing mold uses a two-part mold-parting method. That is, the bottom cover is partially injection-molded in a single mold, and then the mold is separated. Finally, the sealing ring is injected in a second mold-parting method, and then the second mold is parted to remove the part. To ensure the stability of the bottom cover during the first parting, the bottom cover is usually set to an interference fit with the mold to ensure that the bottom cover does not shake during the first parting and to avoid the phenomenon of sol penetration during the secondary injection molding. This can make it difficult to vent air during the secondary injection molding, making the secondary injection molded sealing ring uneven and even containing bubbles, which in turn leads to poor sealing performance and even failure. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a two-color bottom cover mold with simple structure, high efficiency and high qualified rate.

[0004] In order to solve the above technical problems, the utility model is solved by the following technical solutions: a two-color bottom cover mold, including an upper mold assembly and a lower mold assembly, characterized in that the upper mold assembly includes an upper mold plate that can be lifted and rotated, the lower mold assembly includes a lower mold plate and an auxiliary plate, the upper mold plate is provided with a first shot insert and a second shot insert, the lower mold plate is provided with a lower mold insert, sliders are provided on both sides of the lower mold insert, the auxiliary plate is provided with an inclined guide column that can movably pass through the lower mold plate and cooperate with the slider, the first shot insert is provided with a shot sleeve, the second shot insert is provided with a second shot sleeve sleeve; during the first mold closing, the one-shot insert, the one-shot sleeve, the slider and the lower mold insert are surrounded by a one-shot cavity, and the one-shot insert, the one-shot sleeve and the lower mold insert are coaxially arranged; during the second mold closing, the two-shot insert, the two-shot sleeve, the slider and the lower mold insert are surrounded by a two-shot cavity, and the two-shot insert, the two-shot sleeve and the lower mold insert are coaxially arranged; the lower end of the one-shot insert is provided with a one-shot inserting head that penetrates into the one-shot cavity, the lower end of the two-shot insert is provided with a two-shot inserting head that penetrates into the two-shot cavity, the diameter of the two-shot inserting head is smaller than that of the one-shot inserting head, and the inner diameter of the two-shot sleeve is smaller than that of the one-shot sleeve.

[0005] Preferably, the one-shot insert and the two-shot insert are symmetrically arranged on the upper mold plate, and the upper mold plate can be rotated to align the one-shot insert or the two-shot insert with the lower mold insert; the advantage is that the position of the one-shot insert and the two-shot insert can be easily interchanged by setting the rotatable upper mold plate, thereby realizing secondary injection molding, and secondary injection molding can be realized without demolding the product as a whole.

[0006] Furthermore, the upper mold assembly also includes a movable plate, which is arranged below the upper mold plate, and the one-shot sleeve and the two-shot sleeve are fixed to the interactive plate. The one-shot insert and the two-shot insert pass downward through the movable plate and cooperate with the corresponding one-shot sleeve and the two-shot sleeve; the advantage is that the movable plate and the one-shot sleeve and the two-shot sleeve can press the bottom cover when the upper mold plate moves upward to remove the one-shot insert or the two-shot insert, thereby preventing the bottom cover from being displaced as the upper mold plate moves due to adhesion.

[0007] Preferably, the auxiliary plate is movably arranged below the lower template and fixed to the inclined guide pillar; the advantage is that the inclined guide pillar can reliably drive the slider through the auxiliary plate, thereby ensuring the sealing of the first-shot cavity and the second-shot cavity during the mold closing process.

[0008] Furthermore, the oblique guide column is provided with a vertical connecting rod, and the connecting rod is vertically movable and passes through the lower template and is fixed to the auxiliary plate.

[0009] Furthermore, the lower die insert includes a lower die punch and a lower die sleeve fixed to the lower die plate. The lower die punch is fixed to the auxiliary plate and can pass through the lower die sleeve upward. The advantage is that the cooperation between the lower die punch and the lower die sleeve can facilitate the separation of the lower die punch, thereby facilitating the clamping of the two-color bottom cover in the later stage.

[0010] Furthermore, after the mold is closed, the slider forms a limiting groove, and the one-shot mold sleeve and the two-shot mold sleeve can be embedded in the corresponding limiting groove; the advantage is that the setting of the limiting groove can ensure the stability of the one-shot cavity or the two-shot cavity after the mold is closed, thereby improving the accuracy of injection molding.

[0011] Preferably, the two-shot insert is provided with two vertical injection channels, which pass through the two-shot insert; after the secondary mold closing, the lower end of the injection channel is located at the bottom of the two-shot cavity; the advantage is that the provided injection channels can realize injection from the bottom, thereby squeezing the air upward and discharging it.

[0012] Compared to existing technologies, this invention offers the following advantages: The upper and lower mold assemblies enable mold closing and opening of the product. The first- and second-shot inserts can be interchanged with the rotation of the upper mold plate, enabling secondary injection, i.e., the cover and seal are individually injection-molded, ensuring reliable fit between the bottom cover and the seal, and facilitating ease of use. Furthermore, the second-shot insert head has a smaller diameter than the first-shot insert head, and the second-shot mold sleeve has a smaller inner diameter than the first-shot mold sleeve, ensuring a certain degree of clearance for the seal during injection molding and facilitating the expulsion of air from the second-shot cavity during secondary injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic structural diagram of the double-color bottom cover of the utility model;

[0015] Figure 2 for Figure 1 Schematic diagram of the cross-section structure;

[0016] Figure 3 This is a schematic diagram of the state of the utility model during one-time mold closing;

[0017] Figure 4 This is a schematic diagram of the state of the utility model during one-time mold separation;

[0018] Figure 5 This is a schematic diagram of the state of the utility model during secondary mold closing;

[0019] Figure 6 This is a schematic diagram of the state of the utility model during secondary mold separation;

[0020] Figure 7 This is a schematic diagram of the cooperation between the two-shot inserting head and the lower mold insert of the utility model;

[0021] Figure 8 for Figure 7 Enlarged schematic diagram of part A. DETAILED DESCRIPTION

[0022] The present invention is described in further detail below with reference to the accompanying drawings.

[0023] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention as defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0024] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate directions or positions are based on the directions or positional relationships shown in the accompanying drawings, which are merely simplified descriptions for the convenience of describing the present invention, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the above terms should not be understood as limitations on the present invention.

[0025] As attached Figure 1-8 The two-color bottom cover mold shown in the figure includes an upper mold assembly 1 and a lower mold assembly 2. The upper mold assembly 1 includes a liftable and rotatable upper mold plate 1.1, and the lower mold assembly 2 includes a lower mold plate 2.1 and an auxiliary plate 2.3. The upper mold plate 1.1 is provided with a first-shot insert 1.2 and a second-shot insert 1.3. The lower mold plate 2.1 is provided with a lower mold insert. Slide blocks 2.2 are provided on both sides of the lower mold insert. The auxiliary plate 2.3 is provided with inclined guide posts 2.4 that can move through the lower mold plate 2.1 and cooperate with the slide blocks 2.2. The first-shot insert 1.2 is provided with a first-shot mold sleeve 1.41, and the second-shot insert 1.3 is provided with a second-shot mold sleeve 1.42. When the mold is closed once, the first-shot insert 1.2 and the first-shot mold sleeve 1.42 are installed. 41, the slider 2.2 and the lower mold insert are surrounded by a one-shot cavity, and the one-shot insert 1.2, the one-shot sleeve 1.41 and the lower mold insert are coaxially arranged; during the secondary mold closing, the two-shot insert 1.3, the two-shot sleeve 1.42, the slider 2.2 and the lower mold insert are surrounded by a two-shot cavity, and the two-shot insert 1.3, the two-shot sleeve 1.42 and the lower mold insert are coaxially arranged; the lower end of the one-shot insert 1.2 is provided with a one-shot insert head 1.21 that penetrates into the one-shot cavity, and the lower end of the two-shot insert 1.3 is provided with a two-shot insert head 1.31 that penetrates into the two-shot cavity, the diameter of the two-shot insert head 1.31 is smaller than the one-shot insert head 1.21, and the inner diameter of the two-shot sleeve 1.42 is smaller than the one-shot sleeve 1.41.

[0026] The upper and lower mold assemblies 1 and 2 enable the product to be molded and separated. The first-shot insert 1.2 and second-shot insert 1.3 interchange with the rotation of the upper mold plate 1.1, enabling secondary injection, i.e., the separate injection molding of the cover body and the sealing portion 4. This ensures a secure fit between the bottom cover 3 and the sealing portion 4 and facilitates ease of use. Furthermore, the diameter of the second-shot insert head 1.31 is smaller than that of the first-shot insert head 1.21, and the inner diameter of the second-shot mold sleeve 1.42 is smaller than that of the first-shot mold sleeve 1.41, ensuring that the sealing portion 4 has a certain clearance during injection molding and facilitating the expulsion of air from the second-shot cavity during secondary injection molding.

[0027] On the basis of the above, the first-shot insert 1.2 and the second-shot insert 1.3 are symmetrically arranged on the upper mold plate 1.1. The upper mold plate 1.1 can be rotated to align the first-shot insert 1.2 or the second-shot insert 1.3 with the lower mold insert. By setting the rotatable upper mold plate 1.1, it is convenient to interchange the positions of the first-shot insert 1.2 and the second-shot insert 1.3, thereby realizing secondary injection molding, and secondary injection molding can be realized without demolding the product as a whole. Furthermore, the upper mold assembly 1 also includes a movable plate 1.4, which is arranged below the upper mold plate 1.1. The first-shot sleeve 1.41 and the second-shot sleeve 1.42 are both fixed to the interactive plate. The first-shot insert 1.2 and the second-shot insert 1.3 pass downward through the movable plate 1.4 and cooperate with the corresponding first-shot sleeve 1.41 and the second-shot sleeve 1.42. Through the provision of the movable plate 1.4, the first-shot sleeve 1.41 and the second-shot sleeve 1.42, the bottom cover 3 can be pressed when the upper mold plate 1.1 moves upward to remove the first-shot insert 1.2 or the second-shot insert 1.3, so as to prevent the bottom cover 3 from being displaced due to adhesion as the upper mold plate 1.1 moves.

[0028] The auxiliary plate 2.3 of the present invention is movably positioned below the lower mold plate 2.1 and secured to the inclined guide post 2.4. The inclined guide post 2.4 is provided with a vertical connecting rod 2.41, which vertically and movably extends beyond the lower mold plate 2.1 and secures to the auxiliary plate 2.3. The lower mold insert comprises a lower mold punch 2.6 and a lower mold insert sleeve 2.5 secured to the lower mold plate 2.1. The lower mold punch 2.6 is secured to the auxiliary plate 2.3 and can be upwardly extended beyond the lower mold insert sleeve 2.5. The engagement of the lower mold punch 2.6 with the lower mold insert sleeve 2.5 facilitates separation of the lower mold punch 2.6, thereby facilitating the subsequent removal of the two-color bottom cover.

[0029] It is worth mentioning that after mold closing, the slider 2.2 forms a limit groove 2.21, and the first-shot mold sleeve 1.41 and the second-shot mold sleeve 1.42 can be embedded in the corresponding limit groove 2.21, thereby ensuring the stability of the first-shot cavity or the second-shot cavity after mold closing and improving the accuracy of injection molding.

[0030] Preferably, the two-shot insert 1.3 of the present invention is provided with two vertical injection channels 1.32, and the injection channels 1.32 run through the two-shot insert 1.3; after the secondary mold closing, the lower end of the injection channel 1.32 is located at the bottom of the two-shot cavity, and injection from the bottom can be achieved through the provided injection channels 1.32, and the two provided injection channels 1.32 can realize simultaneous injection molding of both sides of the bottom cover 3 to form a sealing portion 4, thereby avoiding displacement of the cover body caused by extrusion of the shot during unilateral injection molding, and can squeeze and discharge the air upward.

[0031] The upper mold assembly and the auxiliary plate can be driven by a cylinder, a hydraulic pump or an electric motor, which is the existing technology in this field and will not be described in detail here.

[0032] The working process of the present invention is as follows: the upper die assembly 1 and the lower die assembly 2 are driven together to close the mold for the first time. At this time, the auxiliary plate 2.3 drives the lower die punch 2.6 upward to pass through the lower die insert 2.5, while simultaneously driving the inclined guide post 2.4 to drive the slide 2.2 to close. The movable plate 1.4 then drives the first-shot sleeve 1.41 downward to fit into the retaining groove 2.21. Simultaneously, the first-shot insert 1.2 passes downward through the movable plate 1.4 and the first-shot sleeve 1.41, and together with the first-shot sleeve 1.41, the slide 2.2, and the lower die insert, forms a first-shot cavity. At this point, the upper die insert injects material into the first-shot cavity to form the bottom cover. After the bottom cover is formed, the upper mold plate 1.1 rises, pulling the upper mold insert out. At this point, the movable plate 1.4 remains stationary, allowing the first-shot sleeve 1.41 to press against the cover from above. The movable plate 1.4 then moves upward, separating the first-shot sleeve 1.41 from the lower mold plate 2.1, achieving a single mold split. The upper mold assembly 1 then rotates, causing the upper mold plate 1.1 and movable plate 1.4 to rotate and align the second-shot insert 1.31 and second-shot sleeve 1.42 with the bottom cover. The upper mold assembly 1 moves downward, driving the second-shot sleeve 1.42 to press against the bottom cover. The second-shot insert 1.31 then moves downward into position, forming a second-shot cavity with the slider 2.2 and lower mold insert. The lower mold insert injects material from both sides of the cover to form the seal 4. During this process, the cooperation between the second-shot sleeve 1.42 and the second-shot insert 1.31 effectively ensures the reliable expulsion of air from the seal 4 during injection molding. After the sealing part 4 is injection-molded, the upper mold assembly 1 and the lower mold assembly 2 are separated for the second time. At this time, the upper mold plate 1.1 first moves upward to drive the second-shot inserting head 1.31 to separate, and then the movable plate 1.4 moves upward to drive the second-shot sleeve 1.42 to separate from the lower mold plate 2.1. Finally, the auxiliary plate 2.3 moves downward to drive the lower mold punch 2.6 to move downward. At the same time, the inclined guide column 2.4 drives the slider 2.2 to separate, realizing the final secondary mold separation, which is convenient for subsequent product clamping.

[0033] Those skilled in the art will appreciate that the embodiments of the present invention described above and shown in the accompanying drawings are intended only as examples and do not limit the present invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been demonstrated and illustrated in the embodiments. Any variations or modifications may be made to the embodiments of the present invention without departing from the principles described.

Claims

1. A two-color bottom cover mold, comprising an upper mold assembly and a lower mold assembly, characterized in that: The upper mold assembly includes an upper mold plate that can be lifted and rotated, and the lower mold assembly includes a lower mold plate and an auxiliary plate. The upper mold plate is provided with a first-shot insert and a second-shot insert. The lower mold plate is provided with a lower mold insert. Slide blocks are provided on both sides of the lower mold insert. The auxiliary plate is provided with an inclined guide column that can movably pass through the lower mold plate and cooperate with the slide block. The first-shot insert is provided with a first-shot mold sleeve, and the second-shot insert is provided with a second-shot mold sleeve. When the mold is closed once, the first-shot insert, the first-shot mold sleeve, the slide block and the lower mold insert surround The mold is gathered into a one-shot cavity, and the one-shot insert, the one-shot sleeve and the lower mold insert are coaxially arranged; when the mold is closed for the second time, the two-shot insert, the two-shot sleeve, the slider and the lower mold insert are gathered into a two-shot cavity, and the two-shot insert, the two-shot sleeve and the lower mold insert are coaxially arranged; the lower end of the one-shot insert is provided with a one-shot insert head that penetrates into the one-shot cavity, and the lower end of the two-shot insert is provided with a two-shot insert head that penetrates into the two-shot cavity, the diameter of the two-shot insert head is smaller than that of the one-shot insert head, and the inner diameter of the two-shot sleeve is smaller than that of the one-shot sleeve.

2. The two-color bottom cover mold according to claim 1, characterized in that: The one-shot insert and the two-shot insert are symmetrically arranged on the upper mold plate, and the upper mold plate can be rotated to align the one-shot insert or the two-shot insert with the lower mold insert.

3. The two-color bottom cover mold according to claim 2, characterized in that: The upper mold assembly also includes a movable plate, which is arranged below the upper mold plate. The one-shot sleeve and the two-shot sleeve are both fixed to the interactive plate. The one-shot insert and the two-shot insert pass through the movable plate downward and cooperate with the corresponding one-shot sleeve and the two-shot sleeve.

4. The two-color bottom cover mold according to claim 1, characterized in that: The auxiliary plate is movably arranged below the lower template and is fixed to the inclined guide column.

5. The two-color bottom cover mold according to claim 4, characterized in that: The oblique guide column is provided with a vertical connecting rod, and the connecting rod is vertically movable and passes through the lower template and is fixed to the auxiliary plate.

6. The two-color bottom cover mold according to claim 5, characterized in that: The lower die insert comprises a lower die punch and a lower die insert sleeve fixed to the lower die plate; the lower die punch is fixed to the auxiliary plate and can pass through the lower die insert sleeve upwards.

7. The two-color bottom cover mold according to claim 6, characterized in that: After the mold is closed, the slider forms a limiting groove, and the first-shot mold sleeve and the second-shot mold sleeve can be embedded in the corresponding limiting groove.

8. The two-color bottom cover mold according to claim 1, characterized in that: The two-shot insert is provided with two vertical injection channels, which penetrate the two-shot insert; after the secondary mold closing, the lower ends of the injection channels are located at the bottom of the two-shot cavity.

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