A movable two-color mold that saves on rear mold structure

Abstract

This utility model discloses a movable two-color mold that saves on rear mold structure. It includes a front mold mechanism, a rear mold mechanism, and a rear mold movement drive mechanism. The front mold mechanism has a first front mold cavity, a second front mold cavity, a first hot runner, and a second hot runner. The rear mold mechanism has a rear mold cavity. The rear mold movement drive mechanism is connected to the rear mold mechanism and can drive the rear mold mechanism to move laterally. This allows the rear mold cavity of the rear mold mechanism to move to and cooperate with the first front mold cavity of the front mold mechanism, and to switch to and cooperate with the second front mold cavity of the front mold mechanism. This utility model has a reasonable structural design, requiring only one rear mold. After the first injection, the entire rear mold is pushed to the position for the second injection by the rear mold movement drive mechanism for secondary injection. This saves on rear mold material, reduces mold manufacturing costs, and the product transfer process does not rely on manual operation or complex transmission mechanisms, making it very convenient to use.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and more specifically, to a movable two-color mold that can save on the structure of the rear mold. Background Technology

[0002] like Figure 1 The illustrated two-color plastic product has a main body 101 and a top sheet-like part 102 that are set in different colors, thus requiring two injection molding processes. In the two-color injection molding process, traditional two-color molds typically use two independent front molds and two independent rear molds to achieve two injection molding processes. This design has significant drawbacks: on the one hand, multiple front and rear molds result in large material consumption, complex assembly, and high mold prices; on the other hand, the product needs to be moved between different cavities, and the shifting process relies on manual operation or complex transmission mechanisms, making it difficult to achieve high-precision positioning and easily causing quality problems such as product size deviation and misalignment of mating surfaces. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned defects in the prior art and provide a mobile two-color mold that can save on the back mold structure, reduce the mold manufacturing cost, eliminate the need for manual operation or complex transmission mechanisms during product transfer, and is easy to use.

[0004] To achieve the above objectives, this utility model provides a movable two-color mold that saves on the rear mold structure, including a front mold mechanism, a rear mold mechanism, and a rear mold movement drive mechanism. The front mold mechanism can open and close with the rear mold mechanism. The molding surface of the front mold mechanism is provided with a first front mold cavity and a second front mold cavity. The second front mold cavity is located on one side of the first front mold cavity. The interior of the front mold mechanism is provided with a set of first hot nozzles and a set of second hot nozzles. The first hot nozzles are connected to the first front mold cavity, and the second hot nozzles are connected to the second front mold cavity. The molding surface of the rear mold mechanism is provided with a rear mold cavity. The rear mold movement drive mechanism is connected to the rear mold mechanism and can drive the rear mold mechanism to move laterally relative to the front mold mechanism, so that the rear mold cavity of the rear mold mechanism can move to the first front mold cavity of the front mold mechanism and work with it, and switch to move to the second front mold cavity of the front mold mechanism and work with it.

[0005] Preferably, the front mold mechanism includes a front template, a front runner plate, a front mold base plate, a first front mold blank, and a second front mold blank. The front template, the front runner plate, and the front mold base plate are sequentially connected. The first front mold blank and the second front mold blank are respectively installed in corresponding slots of the front template. The first front mold cavity is disposed on the first front mold blank, and the second front mold cavity is disposed on the second front mold blank. The first hot nozzle passes through the front runner plate, the front template, and the first front mold blank, and the outlet of the first hot nozzle is connected to the first front mold cavity. The second hot nozzle passes through the front runner plate, the front template, and the second front mold blank, and the outlet of the second hot nozzle is connected to the second front mold cavity.

[0006] Preferably, the front mold mechanism further includes a first injection nozzle and a second injection nozzle, both of which are disposed on the front mold base plate, or the first injection nozzle is disposed on the front mold base plate and the second injection nozzle is disposed on one side of the front runner plate. The first injection nozzle is connected to the first hot nozzle through a flow channel in the front runner plate, and the second injection nozzle is connected to the second hot nozzle through another flow channel in the front runner plate.

[0007] Preferably, the rear mold mechanism includes a rear mold plate, a rear mold block, a rear mold base plate, a rear mold blank, a rear mold slide, and a slide core-pulling driving device. The rear mold block is installed between the rear mold plate and the rear mold base plate. The rear mold blank is installed in a slot in the rear mold plate. The rear mold slide is located on one side of the rear mold blank. The slide core-pulling driving device is installed on the side of the rear mold plate. The slide core-pulling driving device is connected to the rear mold slide and can drive the rear mold slide away from or towards the rear mold blank. The rear mold cavity is disposed on the rear mold blank and the rear mold slide.

[0008] Preferably, the core-pulling drive device is configured as a pneumatic cylinder or a hydraulic cylinder.

[0009] Preferably, the rear mold mechanism further includes an ejector plate and ejector pins. The ejector plate is located between the rear mold plate and the rear mold base plate. Several ejector pins are provided and are respectively installed on the ejector plate. The head end of the ejector pin can pass through the surface of the rear mold blank.

[0010] Preferably, the rear mold moving drive mechanism includes a moving base plate, a rear mold moving drive device, and a limiting guide bar. The rear mold base plate of the rear mold mechanism is slidably mounted on the moving base plate. The cross-sectional shape of the limiting guide bar is set to L-shape. The limiting guide bar is installed on both sides of the moving base plate and can limit the movement of the two sides of the rear mold base plate. The rear mold moving drive device is installed on the side of the moving base plate. The rear mold moving drive device is connected to the rear mold base plate and can drive it to move laterally.

[0011] Preferably, the rear mold moving drive device is configured as a pneumatic cylinder or a hydraulic cylinder, and two rear mold moving drive devices are configured.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] The structure of this utility model is reasonable. It only has one set of rear molds. After the first injection, the entire rear mold is pushed to the position of the second injection by the rear mold moving drive mechanism for secondary injection. This can save the material of the rear mold, reduce the mold preparation cost, and the product shifting process does not rely on manual operation or complex transmission mechanisms, making it very convenient to use. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural diagram of a two-color plastic product;

[0016] Figure 2 This is a schematic diagram of the structure of the movable two-color mold provided in this embodiment of the utility model. Figure 1 ;

[0017] Figure 3 This is a schematic diagram of the front mold mechanism provided in an embodiment of the present invention;

[0018] Figure 4 This is a schematic diagram of the rear mold mechanism provided in this embodiment of the utility model. Figure 1 ;

[0019] Figure 5 This is a schematic diagram of the rear mold mechanism provided in this embodiment of the utility model. Figure 2 ;

[0020] Figure 6 This is a schematic diagram of the structure of the movable two-color mold provided in the embodiment of this utility model at the first injection station;

[0021] Figure 7 This is a schematic diagram of the structure of the movable two-color mold provided in the embodiment of this utility model at the second injection station. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Please refer to Figure 2 This utility model provides a movable two-color mold that saves on the rear mold structure, including a front mold mechanism 1, a rear mold mechanism 2, and a rear mold movement drive mechanism 3. The front mold mechanism 1 can open and close the mold with the rear mold mechanism 2, and the rear mold movement drive mechanism 3 can drive the rear mold mechanism 2 to move laterally. The components of this embodiment will be described in detail below with reference to the accompanying drawings.

[0024] like Figure 2 and Figure 3 As shown, the front mold mechanism 1 may include a front template 11, a front runner plate 12, a front mold base plate 13, a first front mold blank 14, a second front mold blank 15, a first hot nozzle 16, and a second hot nozzle 17. The front template 11, the front runner plate 12, and the front mold base plate 13 are sequentially connected. The first front mold blank 14 and the second front mold blank 15 are respectively installed in the corresponding slots of the front template 11. The first front mold blank 14 is provided with a first front mold cavity 110, and the second front mold blank 15 is provided with a second front mold cavity 111. The first hot nozzle 16 can pass through the front runner plate 12, the front template 11, and the first front mold blank 14. There may be two first hot nozzles 16. The outlet of the first hot nozzle 16 is connected to the first front mold cavity 110. The second hot nozzle 17 can pass through the front runner plate 12, the front template 11, and the second front mold blank 15. There may be two second hot nozzles 17. The outlet of the second hot nozzle 17 is connected to the second front mold cavity 111.

[0025] In addition, the front mold mechanism 1 may also include a first inlet nozzle 18 and a second inlet nozzle 19. The first inlet nozzle 18 is disposed on the front mold base plate 11, and the second inlet nozzle 19 is disposed on one side of the front runner plate 12. The first inlet nozzle 18 is connected to the inlet of the first hot nozzle 16 through the flow channel in the front runner plate 12, and the second inlet nozzle 19 is connected to the inlet of the second hot nozzle 17 through another flow channel in the front runner plate 12.

[0026] Of course, in other embodiments, the first injection nozzle 18 and the second injection nozzle 19 may also be simultaneously disposed on the front mold base plate 13, which is not limited to this embodiment.

[0027] like Figure 4 and Figure 5As shown, the rear mold mechanism 2 may include a rear template 21, a rear mold block 22, a rear mold base plate 23, a rear mold blank 24, a rear mold slide 25, and a slide core-pulling driving device 26. Two rear mold blocks 22 are provided and are installed at intervals between the rear template 21 and the rear mold base plate 23. The rear mold blank 24 is installed in the slot of the rear template 21. The rear mold slide 25 is located on one side of the rear mold blank 24. The slide core-pulling driving device 26 is installed on the side of the rear template 21. The slide core-pulling driving device 26 is connected to the rear mold slide 25 and can drive the rear mold slide 25 away from or closer to the rear mold blank 24. The rear mold cavity 27 is provided on the rear mold blank 24 and the rear mold slide 25. That is, the cavity on the rear mold blank 24 and the rear mold slide 25 is combined to form the rear mold cavity 27.

[0028] In this embodiment, the sliding core-pulling drive device 26 can preferably be configured as a pneumatic cylinder or a hydraulic cylinder, or of course, it can be configured as a common drive device such as a motor + lead screw.

[0029] like Figure 5 As shown, the rear mold mechanism 2 may also include an ejector plate 28 and ejector pins 29. The ejector plate 28 is located between the rear mold plate 21 and the rear mold base plate 23. Several ejector pins 29 are provided and are respectively installed on the ejector plate 28. The head end of the ejector pin 29 can pass through the surface of the rear mold blank 24.

[0030] like Figure 4 and Figure 5 As shown, the rear mold moving drive mechanism 3 may include a moving base plate 31, a rear mold moving drive device 32, and a limiting guide bar 33. The rear mold base plate 23 of the rear mold mechanism 2 is slidably mounted on the moving base plate 31. The cross-sectional shape of the limiting guide bar 33 is set to L-shape. The limiting guide bar 33 is installed on both sides of the moving base plate 31 and can limit the movement of the two sides of the rear mold base plate 23. The rear mold moving drive device 32 is installed on the side of the moving base plate 31. The rear mold moving drive device 32 is connected to the rear mold base plate 23 and can drive it to move laterally.

[0031] In this embodiment, the rear mold moving drive device 32 can preferably be configured as a cylinder or a hydraulic cylinder, or it can be configured as a common drive device such as a motor and a lead screw. Preferably, two rear mold moving drive devices 32 are provided, which facilitates the balanced movement of the rear mold base plate 23 and avoids the problem of the plate getting stuck.

[0032] The working principle of this utility model is as follows:

[0033] like Figure 6As shown, when the two-color mold performs the first injection molding, the front mold mechanism 1 and the rear mold mechanism 2 close the mold. The rear mold blank 24 of the rear mold mechanism 2 cooperates with the first front mold blank 14 of the front mold mechanism 1 for injection molding. The first front mold cavity 110 of the first front mold blank 14 and the rear mold cavity 27 of the rear mold blank 24 together form the first injection cavity for preparing the main body part 101 of the two-color plastic product. The first plastic material can be injected into the first injection cavity through the first hot nozzle 16, thereby injection molding the main body part 101 of the two-color plastic product.

[0034] like Figure 7 As shown, when the two-color mold needs to continue the second injection molding, the front mold mechanism 1 and the rear mold mechanism 2 open the mold. The rear mold moving drive mechanism 3 can drive the rear mold mechanism 2 and the main body 101 of the molded two-color plastic product to move laterally relative to the front mold mechanism 1, so that the rear mold cavity 27 of the rear mold mechanism 2 moves to the corresponding position of the second front mold cavity 111 of the front mold mechanism 1. Then the front mold mechanism 1 and the rear mold mechanism 2 close the mold again. The second front mold cavity 111 of the first front mold blank 14 and the rear mold cavity 27 of the rear mold blank 24 are closed to form a second injection cavity for preparing the top sheet part 102 of the two-color plastic product. The second plastic material can be injected into the second injection cavity through the second hot nozzle 17, so that the top sheet part 102 of the two-color plastic product and the main body 101 are integrally injection molded.

[0035] After the two-color plastic product is injection molded, the front mold mechanism 1 and the rear mold mechanism 2 open the mold. The slide core pulling drive device 26 drives the rear mold slide 25 to retract and reset, releasing the two-color plastic product. Finally, the ejector pin 29 ejects the two-color plastic product to achieve demolding.

[0036] It should be noted that the shapes of the first front mold cavity 110, the second front mold cavity 111, and the rear mold cavity 27 in this embodiment can be set according to the actual shape of different products, and are not limited to this embodiment.

[0037] In summary, the present invention has a reasonable structural design. It only requires one set of rear molds. After the first injection, the entire rear mold is pushed to the position of the second injection by the rear mold moving drive mechanism for secondary injection. This can save materials for the rear mold, reduce the mold manufacturing cost, and the product shifting process does not require manual operation or complex transmission mechanisms, making it very convenient to use.

[0038] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A mobile two-color mold capable of saving a back mold structure, characterized by: The device includes a front mold mechanism, a rear mold mechanism, and a rear mold movement drive mechanism. The front mold mechanism is capable of opening and closing the mold with the rear mold mechanism. The molding surface of the front mold mechanism is provided with a first front mold cavity and a second front mold cavity. The second front mold cavity is located on one side of the first front mold cavity. The interior of the front mold mechanism is provided with a set of first hot nozzles and a set of second hot nozzles. The first hot nozzles are connected to the first front mold cavity, and the second hot nozzles are connected to the second front mold cavity. The molding surface of the rear mold mechanism is provided with a rear mold cavity. The rear mold movement drive mechanism is connected to the rear mold mechanism and can drive the rear mold mechanism to move laterally relative to the front mold mechanism. This allows the rear mold cavity of the rear mold mechanism to move to the first front mold cavity of the front mold mechanism and work with it, as well as to switch to the second front mold cavity of the front mold mechanism and work with it.

2. The mobile two-color mold capable of saving a back mold structure according to claim 1, wherein: The front mold mechanism includes a front template, a front runner plate, a front mold base plate, a first front mold blank, and a second front mold blank. The front template, the front runner plate, and the front mold base plate are sequentially connected. The first front mold blank and the second front mold blank are respectively installed in corresponding slots of the front template. The first front mold cavity is disposed on the first front mold blank, and the second front mold cavity is disposed on the second front mold blank. The first hot nozzle passes through the front runner plate, the front template, and the first front mold blank, and the outlet of the first hot nozzle is connected to the first front mold cavity. The second hot nozzle passes through the front runner plate, the front template, and the second front mold blank, and the outlet of the second hot nozzle is connected to the second front mold cavity.

3. The mobile two-color mold with a post-mold structure saving portion according to claim 2, characterized in that: The front mold mechanism further includes a first injection nozzle and a second injection nozzle. Both the first injection nozzle and the second injection nozzle are disposed on the front mold base plate, or the first injection nozzle is disposed on the front mold base plate and the second injection nozzle is disposed on one side of the front runner plate. The first injection nozzle is connected to the first hot nozzle through a flow channel in the front runner plate, and the second injection nozzle is connected to the second hot nozzle through another flow channel in the front runner plate.

4. The mobile two-color mold with a post-mold structure saving portion according to claim 1, wherein: The rear mold mechanism includes a rear mold plate, a rear mold block, a rear mold base plate, a rear mold blank, a rear mold slide, and a slide core-pulling driving device. The rear mold block is installed between the rear mold plate and the rear mold base plate. The rear mold blank is installed in a slot in the rear mold plate. The rear mold slide is located on one side of the rear mold blank. The slide core-pulling driving device is installed on the side of the rear mold plate. The slide core-pulling driving device is connected to the rear mold slide and can drive the rear mold slide away from or towards the rear mold blank. The rear mold cavity is set on the rear mold blank and the rear mold slide.

5. The mobile two-color mold capable of saving a back mold structure according to claim 4, wherein: The core-pulling and moving drive device is configured as a pneumatic cylinder or a hydraulic cylinder.

6. The mobile two-color mold capable of saving a back mold structure according to claim 4, wherein: The rear mold mechanism also includes an ejector plate and ejector pins. The ejector plate is located between the rear mold plate and the rear mold base plate. Several ejector pins are provided and are respectively installed on the ejector plate. The head end of the ejector pin can pass through the surface of the rear mold blank.

7. The mobile two-color mold capable of saving a back mold structure according to claim 4, wherein: The rear mold moving drive mechanism includes a moving base plate, a rear mold moving drive device, and a limiting guide bar. The rear mold base plate of the rear mold mechanism is slidably mounted on the moving base plate. The cross-sectional shape of the limiting guide bar is set to L-shape. The limiting guide bar is installed on both sides of the moving base plate and can limit the movement of the two sides of the rear mold base plate. The rear mold moving drive device is installed on the side of the moving base plate. The rear mold moving drive device is connected to the rear mold base plate and can drive it to move laterally.

8. The mobile two-color mold capable of saving a back mold structure according to claim 7, wherein: The rear mold moving drive device is configured as a pneumatic cylinder or a hydraulic cylinder, and two rear mold moving drive devices are configured.

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