Injection molding structure and method for double-color double-gram-weight product

Abstract

The invention belongs to the technical field of injection molds, and particularly relates to an injection molding structure and method for a double-color double-gram-weight product, the injection molding structure comprises an injection molding machine and a mold arranged on the injection molding machine, and two adjacent vertical faces of the mold are provided with a first glue injection opening and a second glue injection opening correspondingly; a first glue injection opening and a second glue injection opening are formed in the mold body, a first glue injection screw and a second glue injection screw are correspondingly arranged at the first glue injection opening and the second glue injection opening respectively and used for injection molding of a first-color small-gram-weight product and a second-color large-gram-weight product respectively, the mold comprises a fixed mold body and a movable mold body, and the movable mold body can rotate by 180 degrees; and the injection molding device is used for transferring the injection-molded first-color small-gram-weight product to the injection molding of a second-color large-gram-weight product, and meanwhile, the injection molding of the next first-color small-gram-weight product is carried out. Through the arrangement design of the mold, the screw does not need to be frequently replaced, the cost of replacing the screw can be saved, the service life of the injection molding machine is prolonged, meanwhile, the appearance quality of a double-color small-gram-weight product can be guaranteed, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to an injection molding structure and method for double-color and double-weight products. Background Art

[0002] At the current stage of rapid development of injection molds, there are more and more complex injection molded parts. Among them, the large weight difference between the two-color products of the two-color mold is already a common phenomenon. The production of two-color small-weight products often faces the problem of matching with the injection molding machine. Due to the large weight difference between the two-color products, the cavity side of the large-weight product has not completed the injection molding while the cavity side of the small-weight product has completed the injection molding in advance. At this time, the valve needle of the small-weight product is closed, and the molten material in the barrel of the small-weight product is in a heated state for a long time. The degradation of the material will cause the molded part to turn yellow during the next mold injection.

[0003] At the same time, the traditional mold arrangement design has problems such as waste of injection molding machine resources, low production efficiency, and unstable product quality when processing small-weight products. For example, using a large injection molding machine to produce small-weight products will lead to high resource consumption and increased costs; while inappropriate mold arrangement may cause uneven pressure distribution during the injection molding process, affecting product quality. Summary of the invention

[0004] The purpose of the present invention is to solve the defects and shortcomings in the prior art and to provide an injection molding structure and method for a double-color and double-weight product.

[0005] To achieve the above object, the technical solution adopted by the present invention is: an injection molding structure for a two-color and two-gram weight product, comprising an injection molding machine and a mold arranged on the injection molding machine, wherein a first injection port and a second injection port are respectively arranged on two adjacent vertical surfaces of the mold, and corresponding first injection screws and second injection screws are respectively arranged at the first injection port and the second injection port, which are respectively used for injection molding of a first color and a small gram weight product and injection molding of a second color and a large gram weight product;

[0006] The mold includes a fixed mold and a movable mold. The movable mold can rotate 180° under the action of its driving component to achieve switching between its first position and second position, and is used to transfer the first color small gram weight product injection molded by the first injection port to the second injection port for injection molding of the second color large gram weight product, while the first injection port performs injection molding of the next first color small gram weight product.

[0007] Preferably, a first positioning ring and a second positioning ring are respectively provided at the first glue injection port and the second glue injection port, which are respectively used to cooperate and connect with the first nozzle of the first glue injection screw and the second nozzle of the second glue injection screw.

[0008] Preferably, the mold further comprises a diverter plate.

[0009] Preferably, the diameter of the first injection screw is 25 / 40 mm, and the material storage capacity is 76 / 261 g; the diameter of the second injection screw is 70 mm, and the material storage capacity is 1440 g.

[0010] Preferably, the injection molding of the first color and small gram weight product is located on the non-operator side, and the injection molding of the second color and large gram weight product is located on the operator side.

[0011] An injection molding method for a double-color and double-weight product, using the above-mentioned injection molding structure, comprises the following steps:

[0012] S1, the movable mold is located at the initial first position and is molded together with the fixed mold;

[0013] S2, injecting glue through the first nozzle of the first injection screw against the first positioning ring to complete the injection molding of the first color and small weight product;

[0014] S3, open the mold, rotate the movable mold 180° to the second position, and close the mold with the fixed mold again;

[0015] S4, the second nozzle of the second injection screw pushes against the second positioning ring to inject glue to complete the injection molding of the second color heavy weight product, and at the same time, the first nozzle of the first injection screw pushes against the first positioning ring to inject glue to complete the injection molding of the next first color light weight product;

[0016] S5, mold opening, the ejection system ejects and takes out the two-color product that has completed the injection molding of the second color heavy weight product. After the ejection system is reset, the movable mold rotates 180° and then closes with the fixed mold;

[0017] S6, repeat the above steps S4 and S5, and repeat the cycle.

[0018] After adopting the above technical solution, the injection molding structure and method for double-color and double-weight products provided by the present invention have the following beneficial effects:

[0019] 1) The present invention can solve the appearance defects of two-color small-weight products and improve the product appearance quality;

[0020] 2) The present invention can improve the utilization rate of the injection molding machine and avoid waste of resources. A suitable injection molding machine can be selected according to the small-weight product. There is no need to frequently replace the screw due to the production of small-weight products, which saves the cost of replacing the screw and increases the service life of the injection molding machine.

[0021] 3) The present invention can improve production efficiency and increase output per unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the first color and small gram weight product injection molding using the present invention;

[0023] Figure 2 The present invention is a schematic structural diagram of simultaneously performing injection molding of a first color small grammage product and a second color large grammage product.

[0024] Among them: the second injection screw 1, the third injection screw 2, the first injection screw 3, the injection molding machine 4, the diverter plate 5, the first color small gram weight product 6, the second color large gram weight product 7, the second nozzle 8, the third nozzle 9, the first nozzle 10, the second positioning ring 11, and the first positioning ring 12. DETAILED DESCRIPTION

[0025] The present invention is further described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0027] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0028] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0029] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0030] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0031] As we all know, traditional injection molding machines usually use Figure 1-2 The second injection screw 1 and the third injection screw 2 shown in the figure are used for two-color injection molding, but because the third injection screw 2 stores more material, using it for injection molding of small-weight products will cause material degradation, and the product is prone to yellowing, affecting the appearance of the product. To solve this problem, the third injection screw 2 needs to be replaced and a small screw is used to achieve injection molding. However, the cost and time of screw replacement are high, and the service life of the injection molding machine is also affected. Therefore, the present invention proposes a new mold arrangement method to solve this problem. Specifically, the present invention provides an injection molding structure for two-color and double-weight products, such as Figure 1-2As shown, it includes an injection molding machine 4 and a mold arranged on the injection molding machine 4, wherein the first injection port and the second injection port are respectively arranged on two adjacent vertical surfaces of the mold, and the first injection port and the second injection port are respectively arranged with corresponding first injection screws 3 and second injection screws 1, which are respectively used for injection molding of a first color small gram weight product and injection molding of a second color large gram weight product, specifically, the first injection port and the second injection port are respectively arranged with a first positioning ring 12 and a second positioning ring 11, which are respectively used to cooperate and connect with the first nozzle 10 of the first injection screw 3 and the second nozzle 8 of the second injection screw 1;

[0032] The mold includes a fixed mold and a movable mold. The movable mold can rotate 180° under the action of its driving component to achieve switching between its first position and second position, and is used to transfer the first color small gram weight product injection molded by the first injection port to the second injection port for injection molding of the second color large gram weight product, while the first injection port performs injection molding of the next first color small gram weight product. Specifically, the mold also includes a diverter plate 5, the first color small gram weight product 6 injection molding is located on the non-operator side, and the second color large gram weight product 7 injection molding is located on the operator side.

[0033] Furthermore, the diameter of the first injection screw 3 is 25 / 40 mm, and the material storage capacity is 76 / 261 g, which is used to realize the injection molding of the first color and small gram weight product. The diameter of the second injection screw 1 is 70 mm, and the material storage capacity is 1440 g, which is used to realize the injection molding of the second color and large gram weight product.

[0034] The present invention provides an injection molding method for a double-color and double-weight product, which adopts the above-mentioned injection molding structure and comprises the following steps:

[0035] S1, the movable mold is located at the initial first position and is molded together with the fixed mold;

[0036] S2, the second nozzle 8 of the second injection screw 1 and the third nozzle 9 of the third injection screw 2 remain stationary, and the first nozzle 10 of the first injection screw 3 pushes against the first positioning ring 12 to inject glue to complete the injection molding of the first color small weight product 6;

[0037] S3, open the mold, the movable mold rotates 180° to the second position, at this time the small weight product rotates to the operator side and closes with the fixed mold again;

[0038] S4, the third nozzle 9 of the third injection screw 2 remains stationary, and the second nozzle 8 of the second injection screw 1 pushes against the second positioning ring 11 to inject glue to complete the injection molding of the second color heavy weight product 7, and at the same time, the first nozzle 10 of the first injection screw 3 pushes against the first positioning ring 12 to inject glue to complete the injection molding of the next first color light weight product 6;

[0039] S5, mold opening, the ejection system ejects and takes out the two-color product 7 that has been completed by injection molding of the second color and heavy weight. After the ejection system is reset, the movable mold rotates 180° and then closes with the fixed mold.

[0040] S6, repeat the above steps S4 and S5, and the two-color injection molding cycle can be completed by repeating the cycle.

[0041] Among them, in step S5, since the injection molding of the second color heavy weight product 7 is designed to be located on the operator side, it is convenient for the operator to take out the product when the injection molding is completed and the product is ejected.

[0042] To sum up, the injection molding structure and method for two-color and two-gram weight products provided by the present invention solve the problem that two-color and small-gram weight products are not matched with the injection molding machine, and can achieve efficient matching of two-color and small-gram weight products with the injection molding machine. Through the mold ranking design, it breaks the traditional injection molding method of using the second injection screw 1 and the third injection screw 2, and instead uses the second injection screw 1 and the first injection screw 3 to complete the injection molding. There is no need to replace the screw frequently, which can save the cost of replacing the screw and increase the service life of the injection molding machine. At the same time, it can ensure the appearance quality of the two-color and small-gram weight products and improve production efficiency.

[0043] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection molding structure for a double-color and double-weight product, characterized in that: The invention comprises an injection molding machine (4) and a mold arranged on the injection molding machine (4), wherein a first injection port and a second injection port are respectively arranged on two adjacent vertical surfaces of the mold, and a first injection screw (3) and a second injection screw (1) are respectively arranged at the first injection port and the second injection port, and are respectively used for injection molding of a first color small gram weight product and injection molding of a second color large gram weight product; The mold includes a fixed mold and a movable mold. The movable mold can rotate 180° under the action of its driving component to achieve switching between its first position and second position, and is used to transfer the first color small gram weight product injection molded by the first injection port to the second injection port for injection molding of the second color large gram weight product, while the first injection port performs injection molding of the next first color small gram weight product.

2. The injection molding structure for double-color and double-weight products according to claim 1, characterized in that: A first positioning ring (12) and a second positioning ring (11) are respectively provided at the first glue injection port and the second glue injection port, and are respectively used to cooperate and connect with the first nozzle (10) of the first glue injection screw (3) and the second nozzle (8) of the second glue injection screw (1).

3. The injection molding structure for double-color and double-weight products according to claim 1, characterized in that: The mold further comprises a diverter plate (5).

4. The injection molding structure for a double-color and double-weight product according to claim 1, characterized in that: The diameter of the first injection screw (3) is 25 / 40 mm, and the material storage capacity is 76 / 261 g; the diameter of the second injection screw (1) is 70 mm, and the material storage capacity is 1440 g.

5. The injection molding structure for double-color and double-weight products according to claim 1, characterized in that: The injection molding of the first color and small grammage product (6) is located on the non-operator side, and the injection molding of the second color and large grammage product (7) is located on the operator side.

6. An injection molding method according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, the movable mold is located at the initial first position and is molded together with the fixed mold; S2, the first nozzle (10) of the first injection screw (3) pushes against the first positioning ring (12) to inject glue to complete the injection molding of the first color and small gram weight product (6); S3, open the mold, rotate the movable mold 180° to the second position, and close the mold with the fixed mold again; S4, the second nozzle (8) of the second injection screw (1) pushes against the second positioning ring (11) to inject glue to complete the injection molding of the second color and large gram weight product (7), and at the same time, the first nozzle (10) of the first injection screw (3) pushes against the first positioning ring (12) to inject glue to complete the injection molding of the next first color and small gram weight product (6); S5, mold opening, the ejection system ejects and removes the two-color product that has been completed by injection molding of the second color heavy weight product (7), and after the ejection system is reset, the movable mold rotates 180° and then closes with the fixed mold; S6, repeat the above steps S4 and S5, and repeat the cycle.

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