A two-color mold structure mold

Abstract

The application discloses a double-color mold structure mold, which comprises a front mold, a rear mold, a linkage plate, a reset rod, a sliding rail and a sliding block, the linkage plate is movably arranged in the rear mold along a mold opening and closing direction, the reset rod is movably arranged on the rear mold along the mold opening and closing direction and is connected with the linkage plate, the sliding rail is connected with the linkage plate and moves synchronously with the linkage plate, the sliding rail is inclined from the edge of the rear mold core to the middle part of the rear mold core from front to back, and the sliding block is connected with the sliding rail, wherein the rear mold is provided with a limiting sliding block in the mold opening and closing direction and a guide groove for allowing the sliding block to slide in a transverse direction, and the transverse direction is perpendicular to or inclined to the mold opening and closing direction. In the double-color mold structure mold, the sliding block moves away from a one-color part of a product during formation of a double-color mold cavity, so that the problem that the one-color part is damaged due to the movement of the sliding block to the one-color part of the product can be avoided, and the forming effect of the product can be ensured.

Description

Technical Field

[0001] This invention relates to the field of molds, and more specifically to a two-color mold structure. Background Technology

[0002] A two-color mold is a mold in which two plastic materials are injected on a two-color injection molding machine, forming the product in two stages, but the product only exits the mold once. It can make the product have two different colors or materials.

[0003] In existing two-color molds, after the first color is molded, when the second color is injected, the front and rear molds will close again. During the second mold closing process, the slider moves towards the first color part of the product and forms an injection cavity for the second color part between it and the outer side of the product. If the injection cavity is small, or if the slider is close to the first color part, the first color part is easily damaged by the slider, affecting the final molding effect of the product. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] This invention provides a two-color mold structure, which solves at least the technical problem of how to avoid the one-color part being damaged by the slider and improve the molding effect of the product.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0008] A two-color mold structure includes:

[0009] Front mold, the front mold including a front mold core;

[0010] The rear mold can be opened and closed relative to the front mold, and includes a rear mold core;

[0011] A linkage plate, which is movably disposed within the rear mold along the mold opening and closing direction;

[0012] A reset rod is movably mounted on the rear mold along the mold opening and closing direction and is connected to the linkage plate.

[0013] The slide rail and the slider are connected to the linkage plate and move synchronously with the linkage plate. The slide rail is inclined from the edge of the rear mold core to the center of the rear mold core from front to back. The slider is connected to the slide rail.

[0014] The rear mold is provided with a guide groove that limits the slider in the opening and closing direction and allows the slider to slide in the lateral direction, which is perpendicular to or inclined to the opening and closing direction. The front mold and the rear mold include a single-color injection position and a two-color injection position. In the single-color injection position, the front mold core and the rear mold core form the outer side of the single-color mold cavity, and the slider is located inside the single-color mold cavity. The single-color mold cavity is used to inject the single-color part of the product. In the two-color injection position, the front mold pushes the reset rod and drives the linkage plate and slide rail to move backward, so that the slider moves away from the single-color part until a two-color mold cavity is formed between the slider and the single-color part. The two-color mold cavity is used to inject the two-color part of the product.

[0015] In some embodiments, the reset rod moves through the rear mold core, the front mold core is provided with a boss, and the boss is provided with a clearance hole;

[0016] When the single-color injection position is reached, the reset rod extends into the clearance hole;

[0017] At the two-color injection position, the boss pushes the reset rod in the mold closing direction until a two-color mold cavity is formed between the slider and the one-color part.

[0018] In some embodiments, the linkage plate, reset rod, slider, and slide rail are provided in two sets;

[0019] When the single-color injection position is reached, a single-color mold cavity is provided between the slider of the first group and the front mold core and the rear mold core;

[0020] At the two-color injection position, the sliders of the first group form a two-color mold cavity with the one-color portion, and the sliders of the second group form a one-color mold cavity with the front mold core and the rear mold core.

[0021] In some embodiments, the two sets of linkage plates, reset rods, sliders and slide rails are symmetrically arranged along a symmetrical plane;

[0022] The rear mold can rotate relative to the front mold along a center line, the center line passing through the plane of symmetry;

[0023] The rear mold, relative to the front mold at the one-color injection position, sequentially passes through mold opening, rotation around the center line by 180°, and mold closing before reaching the two-color injection position.

[0024] In some embodiments, the rear mold core is provided with a movable cavity, and the linkage plate is movably disposed within the movable cavity;

[0025] When the single-color injection position is reached, the movable cavity is provided with space for the linkage plate to move in the mold closing direction;

[0026] In the two-color injection position, the movable cavity is provided with space for the linkage plate to move in the mold opening direction.

[0027] In some embodiments, an inner core disposed on the rear mold core is also included, the inner core and the slider forming the inner side of the single-color mold cavity.

[0028] In some embodiments, the front mold includes a front template, and the guide groove is formed between the front template and the front mold core; the slider includes a guide plate, which is slidably disposed within the guide groove.

[0029] (III) Beneficial Effects

[0030] Compared with the prior art, the two-color mold structure provided by the present invention has the following beneficial effects:

[0031] During the first mold closing of this two-color mold structure, the front and rear molds are positioned at the one-color injection point. The front and rear mold cores form the outer side of the one-color cavity, while the slider is located inside. The one-color portion of the product is injection molded within this cavity. After the one-color portion is formed, the mold opens and closes again at the two-color injection point. During this process, the front mold pushes the reset rod, causing the linkage plate and slide rail to move backward. Because the slide rail is inclined, the slider moves away from the one-color portion until a two-color cavity is formed between the slider and the one-color portion. Then, the two-color cavity is injected to form the two-color portion of the product. It can be seen that during the formation of the two-color cavity, the slider moves away from the one-color portion of the product, preventing damage to this portion and ensuring a better molding effect. Attached Figure Description

[0032] Figure 1 This is a perspective view of the two-color mold structure mold in the embodiment when it is closed.

[0033] Figure 2 This is a perspective view of the two-color mold structure mold during the mold opening process in the embodiment.

[0034] Figure 3 The image shows a cross-sectional view of the two-color mold structure at the injection position of one color in the embodiment.

[0035] Figure 4 for Figure 3 A three-dimensional image.

[0036] Figure 5 This is a cross-sectional view of the two-color mold structure in the embodiment at the two-color injection position.

[0037] Figure 6 for Figure 5 A three-dimensional image.

[0038] Figure 7This is a schematic diagram showing the connection between the linkage plate, reset rod, slide rail and slider in the embodiment.

[0039] Reference numerals: front mold 1, rear mold 2, linkage plate 3, reset rod 4, slide rail 5, slider 6, inner core 7, front mold core 10, boss 11, clearance hole 12, front template 13, rear mold core 20, movable cavity 21, guide groove 22, guide plate 60, single-color mold cavity 100, two-color mold cavity 200. Detailed Implementation

[0040] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0041] In existing two-color molds, after the first color is molded, when the second color is injected, the front and rear molds will close again. During the second mold closing process, the slider moves towards the first color part of the product and forms an injection cavity for the second color part between it and the outer side of the product. If the injection cavity is small, or if the slider is close to the first color part, the first color part is easily damaged by the slider, affecting the final molding effect of the product.

[0042] To solve the above-mentioned technical problems, this embodiment provides a two-color mold structure. Please refer to [link / reference]. Figures 1 to 7 As shown, Figure 1 This is a perspective view of the two-color mold structure during mold closing in the embodiment. Figure 2 This is a perspective view of the two-color mold structure during mold opening in the embodiment. Figure 3 This is a cross-sectional view of the two-color mold structure at the injection position of the single color in the embodiment. Figure 4 for Figure 3 3D image, Figure 5 This is a cross-sectional view of the two-color mold structure at the two-color injection position in the embodiment. Figure 6 for Figure 5 3D image, Figure 7 This is a schematic diagram showing the connection between the linkage plate, reset rod, slide rail and slider in the embodiment.

[0043] The dual-color mold structure of this embodiment includes: front mold 1, rear mold 2, linkage plate 3, reset rod 4, slide rail 5 and slider 6.

[0044] The front mold 1 includes the front mold core 10.

[0045] The aforementioned front mold 1 forms part of the mold cavity through the front mold core 10.

[0046] The rear mold 2 can be opened and closed relative to the front mold 1, and includes the rear mold core 20.

[0047] The aforementioned rear mold 2 forms another part of the mold cavity through the rear mold core 20, and can be rotated to switch between one-color and two-color injection molding.

[0048] The linkage plate 3 is movably located inside the rear mold 2 along the opening and closing direction.

[0049] The aforementioned linkage plate 3 is used to connect the reset rod 4 and the slide rail 5.

[0050] The reset rod 4 is movably mounted on the rear mold 2 along the opening and closing direction and is connected to the linkage plate 3.

[0051] The aforementioned reset rod 4 can move in the opening and closing direction under the push of the front mold core 10, thereby driving the linkage plate 3 to move.

[0052] The slide rail 5 and the slider 6 are connected to the linkage plate 3 and move synchronously with the linkage plate 3. The slide rail 5 is inclined from the edge of the rear mold core 20 to the middle of the rear mold core 20 from front to back. The slider 6 is connected to the slide rail 5. The rear mold 2 is provided with a guide groove 22 that limits the slider 6 in the opening and closing direction and allows the slider 6 to slide in the lateral direction. The lateral direction is perpendicular to or inclined to the opening and closing direction.

[0053] The aforementioned slide rail 5 moves along the opening and closing mold direction, causing the slider 6 to move laterally. Here, "from front to back" refers to the directions of the front mold 1 and the rear mold 2, with the front mold 1 direction being "forward" and the rear mold 2 direction being "backward." Figure 7 As shown, since the slide rail 5 is inclined from front to back along the edge of the rear mold core 20 towards the center of the rear mold core 20, when the slide rail 5 moves backward, the slider 6 can move towards the center of the rear mold core 20.

[0054] The front mold 1 and the rear mold 2 include single-color injection positions and two-color injection positions, such as... Figure 3 and Figure 4 As shown, in the single-color injection position, the front mold core 10 and the rear mold core 20 form the outer side of the single-color mold cavity 100, and the slider 6 is located inside the single-color mold cavity 100. The single-color mold cavity 100 is used for the single-color portion of the injection molded product; as shown Figure 5 and Figure 6 As shown, in the two-color injection position, the front mold 1 pushes the reset rod 4, and drives the linkage plate 3 and slide rail 5 to move backward, so that the slider 6 moves away from the one-color part, until the slider 6 and the one-color part form a two-color mold cavity 200, which is used for the two-color part of the injection molded product.

[0055] In the first mold closing of the two-color mold structure of the above technical solution, the front mold 1 and the rear mold 2 are at the one-color injection position, the front mold core 10 and the rear mold core 20 form the outer side of the one-color mold cavity 100, and the slider 6 is located inside the one-color mold cavity 100. The one-color part of the product is injection molded in the one-color mold cavity 100. After the one-color part of the product is formed, the mold is opened and closed again at the two-color injection position, such as... Figure 7 As shown, during this process, the front mold 1 pushes the reset rod 4, which in turn moves the linkage plate 3 and the slide rail 5 backward. Since the slide rail 5 is inclined, as... Figure 5 and 6 As shown, slider 6 moves away from the single-color portion until a two-color cavity 200 is formed between slider 6 and the single-color portion. Then, injection molding is performed on the two-color cavity 200 to form the two-color portion of the product. It can be seen that during the formation of the two-color cavity 200, slider 6 moves away from the single-color portion of the product, which avoids the problem of slider 6 moving towards the single-color portion and damaging it, thus ensuring the molding effect of the product.

[0056] See Figure 4 and Figure 6 As shown, in one embodiment of the front mold 1 pushing the reset rod 4, the reset rod 4 moves through the rear mold core 20. The front mold core 10 is provided with a boss 11, and the boss 11 is provided with a relief hole 12. In the single-color injection position, the reset rod 4 extends into the relief hole 12, and the boss 11 will not push the reset rod 4. In the two-color injection position, the boss 11 pushes the reset rod 4 in the mold closing direction to move it to form a two-color mold cavity 200 between the slider 6 and the single-color part.

[0057] See Figure 3 As shown and Figure 5 As shown, in this embodiment, the linkage plate 3, reset rod 4, slider 6, and slide rail 5 are provided in two sets. In the single-color injection position, the slider 6 of the first set forms a single-color mold cavity 100 between the front mold core 10 and the rear mold core 20. In the two-color injection position, the slider 6 of the first set forms a two-color mold cavity 200 with the single-color portion, and the slider 6 of the second set forms a single-color mold cavity 100 with the front mold core 10 and the rear mold core 20. This arrangement allows for the simultaneous molding of the single-color portion and the two-color portion, improving product molding efficiency.

[0058] One way to switch between the single-color injection position and the two-color injection position is as follows: two sets of linkage plates 3, reset rods 4, sliders 6 and slide rails 5 are symmetrically arranged along a symmetrical plane; the rear mold 2 can rotate relative to the front mold 1 along a center line, and the center line passes through the symmetrical plane; the rear mold 2 reaches the two-color injection position relative to the front mold 1 in the single-color injection position by sequentially opening the mold, rotating 180° around the center line and closing the mold.

[0059] See Figure 3 and Figure 5 As shown, in one embodiment where the linkage plate 3 is movably disposed within the rear mold 2, the rear mold core 20 is provided with a movable cavity 21, which extends towards the front mold 1, and the linkage plate 3 is movably disposed within the movable cavity 21. In the single-color injection position, the movable cavity 21 provides space for the linkage plate 3 to move in the mold closing direction; in the two-color injection position, the movable cavity 21 provides space for the linkage plate 3 to move in the mold opening direction, thereby allowing the linkage plate 3 to move relative to the rear mold 2 within the movable cavity 21.

[0060] See Figure 3 and Figure 5 As shown, in one embodiment of the single-color mold cavity 100, the mold further includes an inner core 7 disposed on the rear mold core 20. The inner core 7 and the slider 6 form the inner side of the single-color mold cavity 100. When the slider 6 and the single-color part of the product form a two-color mold cavity 200, the inner core 7 can be fixed relative to the single-color part.

[0061] See Figure 6 As shown, in one embodiment where the guide groove restricts the sliding direction of the slider 6, the front mold 1 includes a front template 13 fixed adjacent to the front mold core 10, and a guide groove 22 is formed between the front template 13 and the front mold core 10; the slider 6 includes a guide plate 60, which is slidably disposed in the guide groove 22, wherein both the guide plate 60 and the guide groove 22 can be linearly extended.

[0062] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A two-color mold structure, characterized in that, include: Front mold, the front mold including a front mold core; The rear mold can be opened and closed relative to the front mold, and includes a rear mold core; A linkage plate, which is movably disposed within the rear mold along the mold opening and closing direction; A reset rod is movably mounted on the rear mold along the mold opening and closing direction and is connected to the linkage plate. The slide rail and the slider are connected to the linkage plate and move synchronously with the linkage plate. The slide rail is inclined from the edge of the rear mold core to the center of the rear mold core from front to back. The slider is connected to the slide rail. The rear mold is provided with a guide groove that limits the slider in the opening and closing direction and allows the slider to slide in the lateral direction, which is perpendicular to or inclined to the opening and closing direction. The front mold and the rear mold include a single-color injection position and a two-color injection position. In the single-color injection position, the front mold core and the rear mold core form the outer side of the single-color mold cavity, and the slider is located inside the single-color mold cavity. The single-color mold cavity is used to inject the single-color part of the product. In the two-color injection position, the front mold pushes the reset rod and drives the linkage plate and slide rail to move backward, so that the slider moves away from the single-color part until a two-color mold cavity is formed between the slider and the single-color part. The two-color mold cavity is used to inject the two-color part of the product.

2. The two-color mold structure mold according to claim 1, characterized in that, The reset rod moves through the rear mold core, and the front mold core is provided with a boss, which is provided with a clearance hole. When the single-color injection position is reached, the reset rod extends into the clearance hole; At the two-color injection position, the boss pushes the reset rod in the mold closing direction until a two-color mold cavity is formed between the slider and the one-color part.

3. The two-color mold structure mold according to claim 1, characterized in that, The linkage plate, reset rod, slider, and slide rail are provided in two sets; When the single-color injection position is reached, a single-color mold cavity is provided between the slider of the first group and the front mold core and the rear mold core; At the two-color injection position, the sliders of the first group form a two-color mold cavity with the one-color portion, and the sliders of the second group form a one-color mold cavity with the front mold core and the rear mold core.

4. The two-color mold structure mold according to claim 3, characterized in that, The two sets of linkage plates, reset rods, sliders, and slide rails are symmetrically arranged along a symmetrical plane. The rear mold can rotate relative to the front mold along a center line, the center line passing through the plane of symmetry; The rear mold, relative to the front mold at the one-color injection position, sequentially passes through mold opening, rotation around the center line by 180°, and mold closing before reaching the two-color injection position.

5. The two-color mold structure mold according to claim 3, characterized in that, The rear mold core is provided with a movable cavity, and the linkage plate is movably disposed within the movable cavity; When the single-color injection position is reached, the movable cavity is provided with space for the linkage plate to move in the mold closing direction; In the two-color injection position, the movable cavity is provided with space for the linkage plate to move in the mold opening direction.

6. The two-color mold structure mold according to claim 1, characterized in that, It also includes an inner core disposed on the rear mold core, the inner core and the slider forming the inner side of the single-color mold cavity.

7. The two-color mold structure mold according to claim 1, characterized in that, The front mold includes a front template, and the guide groove is formed between the front template and the front mold core; the slider includes a guide plate, and the guide plate is slidably disposed in the guide groove.

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