Double-color mold structure and injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a bicolor mold structure and an injection mold, the bicolor mold structure comprises a mold main body and a floating mechanism, the mold main body comprises a front mold and a rear mold, the front mold and the rear mold are enclosed to form a cavity, and the front mold comprises a first movable part and a second movable part; the floating mechanism comprises a floating insert and a pushing piece, and the floating insert movably penetrates through the rear mold and corresponds to the first movable part; the rear mold corresponds to the second movable part; the pushing piece is arranged on the rear mold and is connected with the floating insert; the pushing piece drives the floating insert to lift relative to the rear mold; the double-color mold structure has a first injection molding state and a second injection molding state; in the first injection molding state, the first movable part, the floating insert and the rear mold are enclosed to form a first cavity capable of accommodating an injection product; and in the second injection molding state, the first injection product, the floating insert and the rear mold are enclosed to form a second cavity capable of accommodating the second injection product. In the scheme, the two injection molding stages form the limiting part on the secondary injection product, so that the connecting strength of the two injection molding stages is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a double-color mold structure and an injection mold. Background Art

[0002] With the continuous development and progress of science and technology, two-color injection molding has been widely used in almost all plastic fields such as various electronic products, power tools, medical products, household appliances, toys, etc., and related industries such as the production and molding of two-color injection molds, the research and development of two-color injection molding machines and two-color injection molding raw materials have also developed rapidly.

[0003] The products produced by traditional two-shot injection molds include one-shot products and two-shot products. During injection molding, the one-shot product needs to be initially molded in the mold before the two-shot product can be injected. The connection strength at the junction of the one-shot product and the two-shot product is insufficient, which easily causes detachment, affecting the quality of the injection molded product. Utility Model Content

[0004] The main purpose of the utility model is to provide a two-color mold structure, aiming to improve the stability of the connection between the first shot product and the second shot product and improve the quality of the injection molded product.

[0005] To achieve the above purpose, the double-color mold structure proposed by the utility model includes:

[0006] A mold body, the mold body comprising a front mold and a rear mold that are movably connected, the front mold and the rear mold enclose a cavity that can accommodate molten plastic, and the front mold comprises a first movable part and a second movable part that can move relatively;

[0007] A floating mechanism, the floating mechanism comprising a floating insert and a pusher, the floating insert being movably arranged in the rear mold and being arranged corresponding to the first movable part; the rear mold being arranged corresponding to the second movable part; the pusher being arranged in the rear mold and connected to the floating insert, the pusher driving the floating insert to move up and down relative to the rear mold;

[0008] Wherein, the two-color mold structure has a first injection molding state for molding a one-shot product and a second injection molding state for molding the two-shot product on the one-shot product;

[0009] In the first injection molding state, the outer edge of the floating insert is flush with the side of the rear mold facing the front mold, and the first movable portion, the side of the floating insert facing the front mold, and the partial structure of the rear mold close to the floating insert are enclosed to form a first mold cavity capable of accommodating the first-shot product;

[0010] In the second injection molding state, the pushing member drives the floating insert to move closer to the front mold, and the outer edge of the floating insert protrudes from the side of the rear mold facing the front mold. The outer peripheral wall of the molded first-shot product, the outer wall of the floating insert, and the side of the rear mold facing the front mold are combined to form a second cavity that can accommodate the second-shot product.

[0011] Optionally, the floating mechanism further comprises a floating insert seat, the floating insert seat is arranged on the rear mold, and one end of the floating insert away from the cavity is connected to the floating insert seat.

[0012] Optionally, a plurality of floating inserts are provided in the rear mold, and one end of each floating insert away from the cavity is connected to the floating insert seat.

[0013] Optionally, the floating mechanism also includes a floating insert pushing block, which is arranged on the side of the floating insert seat facing away from the cavity, and the floating insert pushing block is clamped with the floating insert seat. The floating insert seat can approach or move away from the cavity in the rear mold along the extension direction of the floating insert.

[0014] Optionally, the two-color mold structure further includes a slider seat, and one end of the floating insert pushing block away from the cavity abuts against the slider seat, and the slider seat can push the floating insert pushing block toward or away from the cavity.

[0015] Optionally, a slide groove is provided at one end of the sliding seat close to the floating insert pushing block, and a sliding part is provided at one end of the sliding seat close to the floating insert pushing block corresponding to the slide groove, and the sliding part is snap-fitted with the slide groove.

[0016] Optionally, the floating insert pushes the first shot product to protrude from the rear mold by a distance of 0.55 mm.

[0017] Optionally, the two-color mold structure further includes a shovel, which is clamped with one end of the slider seat away from the floating insert pushing block, and the shovel can drive the slider seat to move up and down.

[0018] Optionally, the two-shot mold structure further includes an ejector rod, which is disposed on the rear mold and can be lifted and moved relative to the rear mold toward the cavity to eject the two-shot product.

[0019] The utility model also provides an injection mold, which includes the above-mentioned two-color mold structure and a template, and the template is arranged at both ends of the column of the mold to connect the injection mold to an injection molding machine.

[0020] In the technical scheme of the utility model, a two-color mold structure is proposed, including a mold body and a floating mechanism. The entire injection molding process is divided into two stages, and through the active cooperation between the front mold and the rear mold, a first cavity and a second cavity are respectively enclosed in the first injection molding state and the second injection molding state to injection mold a one-shot product and a two-shot product. Before injecting the two-shot product, the floating insert is driven by a pusher to lift the one-shot product in the cavity by a certain distance. In this way, when injecting the two-shot product, the molten plastic can enter this lifted part of the space, and after cooling, a limit portion can be formed on the two-shot product to limit the one-shot product, thereby improving the connection strength between the one-shot product and the two-shot product and ensuring the quality of the injection molded products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 A cross-sectional schematic diagram of an embodiment of a two-color mold structure provided by the utility model;

[0023] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the two-color mold structure;

[0024] Figure 3 for Figure 2 A local enlarged schematic diagram of the .

[0025] Description of Figure Numbers:

[0026] Label name Label name 1000 Two-color mold structure 231 Sliding part 1 Mold body 24 Row seat 11 After the mold 241 Chute 2 Floating mechanism 25 Shovel 21 Floating inserts 100 One shot product 22 Floating insert seat 200 Two shot products 23 Floating insert pusher

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] With the continuous development and progress of science and technology, two-color injection molding has been widely used in almost all plastic fields such as various electronic products, power tools, medical products, household appliances, toys, etc., and related industries such as the production and molding of two-color injection molds, the research and development of two-color injection molding machines and two-color injection molding raw materials have also developed rapidly.

[0032] The products produced by traditional two-shot injection molds include one-shot products and two-shot products. During injection molding, the one-shot product needs to be initially molded in the mold before the two-shot product can be injected. The connection strength at the junction of the one-shot product and the two-shot product is insufficient, which easily causes detachment, affecting the quality of the injection molded product.

[0033] In order to solve the above problems, the utility model proposes a two-color mold structure, which aims to improve the stability of the connection between the first shot product and the second shot product and improve the quality of the injection molded product. Figures 1 to 3 The present invention is a schematic structural diagram of an embodiment of a two-color mold structure provided by the present invention.

[0034] Please refer to Figures 1 to 3The utility model proposes a two-color mold structure 1000, including a mold body 1 and a floating mechanism 2, the mold body 1 includes a front mold and a rear mold 11 that are movably connected, the front mold and the rear mold 11 enclose a cavity that can accommodate molten plastic, and the front mold includes a first movable part and a second movable part that can move relatively; the floating mechanism 2 includes a floating insert 21 and a pusher, the floating insert 21 is movably arranged in the rear mold 11 and is correspondingly arranged with the first movable part; the rear mold 11 is correspondingly arranged with the second movable part; the pusher is arranged in the rear mold 11 and connected with the floating insert 21, and the pusher drives the floating insert 21 to move up and down relative to the rear mold 11; wherein the two-color mold structure 1000 has a first injection molding state for molding a one-shot product 100 and a second injection molding state for molding a one-shot product 100. The second injection molding state of molding the two-shot product 200 on the one-shot product 100; in the first injection molding state, the outer edge of the floating insert 21 is flush with the side of the rear mold 11 facing the front mold, and the first movable part, the side of the floating insert 21 facing the front mold, and the partial structure of the rear mold 11 close to the floating insert 21 are enclosed to form a first cavity that can accommodate the one-shot product 100; in the second injection molding state, the pushing member drives the floating insert 21 to move close to the front mold, and the outer edge of the floating insert 21 protrudes from the side of the rear mold 11 facing the front mold, and the outer peripheral wall of the molded one-shot product 100, the outer wall of the floating insert 21, and the side of the rear mold 11 facing the front mold are enclosed to form a second cavity that can accommodate the two-shot product 200.

[0035] In the technical solution of the utility model, a two-color mold structure 1000 is proposed, including a mold body 1 and a floating mechanism 2. The entire injection molding process is divided into two stages, and through the active cooperation between the front mold and the rear mold 11, a first cavity and a second cavity are respectively enclosed in the first injection molding state and the second injection molding state to injection mold a first-shot product 100 and a second-shot product 200. Before the injection molding of the second-shot product 200, the floating insert 21 is driven by a pusher to lift the first-shot product 100 in the cavity by a certain distance. In this way, when the second-shot product 200 is injected, the molten plastic can enter this part of the lifted space. After cooling, a limit portion can be formed on the second-shot product 200 to limit the first-shot product 100, thereby improving the connection strength between the first-shot product 100 and the second-shot product 200 and ensuring the quality of the injection molded products.

[0036] In an optional embodiment, in order to facilitate the installation of the floating insert 21, the floating mechanism 2 further includes a floating insert seat 22, the floating insert seat 22 is arranged on the rear mold 11, and the end of the floating insert 21 away from the cavity is connected to the floating insert seat 22. Figure 1The end of the floating insert 21 away from the cavity cooperates with the floating insert seat 22. Optionally, a protruding structure can be provided on the floating insert 21 to overlap with the floating insert 21, so that the floating insert seat 22 can limit the floating insert 21 to prevent the floating insert 21 from rotating in the hole.

[0037] Optionally, a plurality of floating inserts 21 are provided in the rear mold 11, and one end of each floating insert 21 away from the cavity is connected to the floating insert seat 22. In the actual product setting process, the two-shot product 200 may cooperate with multiple one-shot products 100, so multiple one-shot products 100 need to be injected simultaneously in one cavity. Correspondingly, multiple floating inserts 21 should also be provided in the injection mold. In order to facilitate the installation and positioning of the floating inserts 21 in one cavity at one time, these floating inserts 21 can be installed on the same floating insert seat 22. Please refer to Figures 1 to 3 Four floating inserts 21 are installed on the floating insert seat 22, which can simplify the installation structure of each floating insert 21 to the greatest extent and facilitate the production of parts in the injection mold.

[0038] In an optional embodiment, in order to push the floating insert 21 to drive the first shot product 100 to move in the cavity, the floating mechanism 2 further includes a floating insert push block 23, which is arranged on the side of the floating insert seat 22 facing away from the cavity, and the floating insert push block 23 is engaged with the floating insert seat 22, and the floating insert seat 22 can be close to or away from the cavity along the extension direction of the floating insert 21 in the rear mold 11. Please refer to Figures 1 to 3 The floating insert pushing block 23 is arranged on the side of the floating insert seat 22 facing away from the cavity. The floating insert pushing block 23 is snap-fitted with the floating insert seat 22 so that when the floating insert pushing block 23 moves toward or away from the cavity in a straight line direction, it can drive the floating insert seat 22 and thus each floating insert 21 can be moved and adjusted relative to the cavity.

[0039] In an optional embodiment, in order to push the floating insert push block 23 to move in the rear mold 11, the two-color mold structure 1000 further includes a slider seat 24, and one end of the floating insert push block 23 away from the cavity abuts against the slider seat 24, and the slider seat 24 can push the floating insert push block 23 to approach or away from the cavity. Figures 1 to 3The contact part between the slider 24 and the floating insert push block 23 is arranged in an inclined surface, so that the movement mode of the slider 24 can be flexibly adjusted to realize the movement of the floating insert 21. For example, when the slider 24 moves along the extension direction perpendicular to the floating insert 21, the slider 24 can press the floating insert push block 23 to make it move in a straight line. When the slider 24 moves along the extension direction of the floating insert 21, the slider 24 can also realize the movement of the floating insert push block 23 by vertical lifting. In this way, whether it is vertical movement or horizontal movement, it can drive the floating insert 21 to move.

[0040] Furthermore, in order to achieve stable cooperation between the slider seat 24 and the floating insert push block 23, a slide groove 241 is provided at one end of the slider seat 24 close to the floating insert push block 23, and a sliding portion 231 is provided at one end of the floating insert push block 23 close to the slider seat 24 corresponding to the slide groove 241, and the sliding portion 231 is engaged with the slide groove 241. Figures 1 to 3 The setting inclination of the slide groove 241 and the sliding part 231 is consistent with the inclination of the inclined surface at the junction of the sliding groove 24 and the floating insert pushing block 23, so that when the slide groove 241 and the sliding part 231 cooperate, the movement trajectory of the floating insert pushing block 23 is always consistent each time, and at the same time, it is ensured that the sliding seat 24 will not interfere with the floating insert pushing block 23 when pushing the floating insert pushing block 23 to move, thereby improving the stability of the cooperation between the sliding seat 24 and the floating insert pushing block 23.

[0041] In an optional embodiment, in order to ensure the connection strength between the first shot product 100 and the second shot product 200, the floating insert 21 pushes the first shot product 100 to protrude from the rear mold 11 by a distance of 0.55 mm. Figure 1Before the injection molding of the first shot product 100, the end face of the outer edge of the floating insert 21 is flush with the end face of the rear mold 11, and the front mold and the rear mold 11 are driven by the pushing mechanism to enclose the cavity of the first shot product 100 to injection mold the first shot product 100. After the first shot product 100 is injection molded and cooled for a period of time, the pushing mechanism drives the front mold to retreat to enclose the cavity of the second shot product 200 with the rear mold 11, and the floating insert 21 is lifted to move the first shot product 100. 0 is ejected by 0.55mm, so that the bottom surface of the first-shot product 100 and the end surface of the lower mold have a height of 0.55mm. When the injection molding of the second-shot product 200 begins, the molten plastic fluid will enter the 0.55mm space, and after cooling, a fixing portion is formed to lock and fix the first-shot product 100 in the second-shot product 200. In this way, the first-shot product 100 and the second-shot product 200 are tightly connected together to avoid separation due to cold shut and other reasons, thereby ensuring the quality of the plastic product.

[0042] In an optional embodiment, in order to realize the movement of the slider seat 24, the two-color mold structure 1000 further includes a shovel 25, which is engaged with one end of the slider seat 24 away from the floating insert push block 23, and the shovel 25 can drive the slider seat 24 to move up and down. Figures 1 to 3 A matching hole is formed at one end of the slider seat 24 away from the floating insert 21, and a partial structure of the shovel 25 is clamped in the matching hole, so that the slider seat 24 can be pulled to move along the extending direction of the floating insert 21, or the slider seat 24 can be pushed to move along the extending direction perpendicular to the floating insert 21, thereby realizing the movement of the floating insert 21.

[0043] In an optional embodiment, in order to facilitate ejection of the two-shot product 200 after injection molding, the two-shot mold structure 1000 further includes an ejector rod, which is disposed on the rear mold 11 and can be lifted and moved relative to the rear mold 11 toward the cavity to eject the two-shot product 200. Figures 1 to 3 A plurality of ejector pins are arranged on the bottom periphery of the two-shot product 200, each of the ejector pins passes through the lower mold, the movable insert seat, the movable insert seat and the slide seat 24, and is connected to the top plate below to realize synchronous movement to eject the two-shot product 200 out of the cavity, thereby ensuring the integrity of the two-shot product 200 and avoiding deformation of the two-shot product 200 caused by inconsistent movement speeds of the ejector pins.

[0044] The utility model also provides an injection mold, which includes a two-color mold structure 1000 and a template, wherein the template is arranged at both ends of the column of the mold to connect the injection mold to an injection molding machine. The specific structure of the two-color mold structure 1000 refers to the above embodiment. Since the injection mold adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0045] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A two-color mold structure, characterized in that: include: A mold body, the mold body comprising a front mold and a rear mold that are movably connected, the front mold and the rear mold enclose a cavity that can accommodate molten plastic, and the front mold comprises a first movable part and a second movable part that can move relatively; A floating mechanism, the floating mechanism comprising a floating insert and a pusher, the floating insert being movably arranged in the rear mold and being arranged corresponding to the first movable part; the rear mold being arranged corresponding to the second movable part; the pusher being arranged in the rear mold and connected to the floating insert, the pusher driving the floating insert to move up and down relative to the rear mold; Wherein, the two-shot mold structure has a first injection molding state for molding a one-shot product and a second injection molding state for molding a two-shot product on the one-shot product; In the first injection molding state, the outer edge of the floating insert is flush with the side of the rear mold facing the front mold, and the first movable portion, the side of the floating insert facing the front mold, and the partial structure of the rear mold close to the floating insert are enclosed to form a first mold cavity capable of accommodating the first-shot product; In the second injection molding state, the pushing member drives the floating insert to move closer to the front mold, and the outer edge of the floating insert protrudes from the side of the rear mold facing the front mold. The outer peripheral wall of the molded first-shot product, the outer wall of the floating insert, and the side of the rear mold facing the front mold are combined to form a second cavity that can accommodate the second-shot product.

2. The two-color mold structure according to claim 1, characterized in that: The floating mechanism also includes a floating insert seat, which is arranged on the rear mold, and one end of the floating insert away from the cavity is connected to the floating insert seat.

3. The two-color mold structure according to claim 2, characterized in that: A plurality of floating inserts are arranged in the rear mold, and one end of each floating insert away from the mold cavity is connected to the floating insert seat.

4. The two-color mold structure according to any one of claims 2 to 3, characterized in that: The floating mechanism also includes a floating insert pushing block, which is arranged on the side of the floating insert seat facing away from the cavity. The floating insert pushing block is clamped with the floating insert seat, and the floating insert seat can approach or move away from the cavity along the extension direction of the floating insert in the rear mold.

5. The two-color mold structure according to claim 4, characterized in that: The two-color mold structure also includes a slider seat, and one end of the floating insert pushing block away from the cavity abuts against the slider seat, and the slider seat can push the floating insert pushing block to approach or away from the cavity.

6. The two-color mold structure according to claim 5, characterized in that: One end of the sliding seat close to the floating insert pushing block is provided with a sliding groove, and one end of the floating insert pushing block close to the sliding seat is provided with a sliding part corresponding to the sliding groove, and the sliding part is correspondingly engaged with the sliding groove.

7. The two-color mold structure according to claim 6, characterized in that: The floating insert pushes the first shot product to protrude from the rear mold by a distance of 0.55 mm.

8. The two-color mold structure according to claim 7, characterized in that: The two-color mold structure also includes a shovel, which is clamped with one end of the slider away from the floating insert pushing block, and the shovel can drive the slider to move up and down.

9. The two-color mold structure according to claim 8, characterized in that: The two-color mold structure also includes an ejector pin, which is disposed on the rear mold and can be lifted and moved relative to the rear mold toward the cavity to eject the two-shot product.

10. An injection mold, characterized in that: comprising the two-color mold structure as claimed in any one of claims 1 to 9, and The template is arranged at two ends of the column of the mold and is used to connect the injection mold to an injection molding machine.

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