Injection mold structure and three-plate mold
By forming the material grabbing part and nozzle part of the cold filling nozzle with the main body, the problems of high cost and long assembly time of the existing three-plate mold are solved, and the stability of the injection molding process and the improvement of material utilization are achieved.
Patent Information
- Application Number
- CN202323037135.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-11-09
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2033-11-09
AI Technical Summary
The existing three-plate mold uses multiple split parts, resulting in high production costs and long assembly time.
By forming the material grabbing part and nozzle part of the cold filling nozzle with the main body part, the number of components is reduced, and the integration of the material grabbing part and nozzle part is achieved.
It reduces production costs and assembly time, and improves the stability and material utilization of the injection molding process.
Smart Images
Figure CN222451172U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of processing molds, and specifically relates to an injection mold structure and a three-plate mold. Background Art
[0002] As an important molding processing method, injection molding is widely used in machinery, chemical industry, transportation and other fields. The parts produced are characterized by high precision, high complexity, high production efficiency and low energy consumption. It has broad market demand and development prospects.
[0003] Due to the limitation of the mold capacity of the micro injection molding machine, the three-plate mold needs to be opened enough during the production process to realize the material rake, which has more stringent requirements on the mold size. The existing three-plate mold is composed of multiple split parts such as grabbing needles, fixing plates, cold filling nozzles, stripping plates and material saving blocks. The overall production cost is high and the overall assembly time is long. Utility Model Content
[0004] The purpose of the utility model is to at least solve the problem that the existing three-plate mold uses multiple split components, resulting in high costs. This purpose is achieved through the following technical solutions:
[0005] The first aspect of the utility model proposes an injection mold structure, including a cold filling nozzle, the cold filling nozzle including a main body, a grabbing part and a nozzle part, the nozzle part and the grabbing part are respectively arranged on the same side of the main body, the main body has a first feed cavity, the nozzle has a flow channel structure, the first feed cavity and the flow channel structure are connected, and the main body, the grabbing part and the nozzle part are an integrally molded structure.
[0006] According to the injection mold structure of the utility model, the material can pass through the first feed cavity and the runner structure in sequence to achieve the purpose of feeding. The grabbing part can pull and fix the shaped material cake when the product is formed, thereby improving the stability during the injection molding process. By integrating the grabbing part and the nozzle part into the main body, the cost and time of making the two parts are saved.
[0007] In addition, the injection mold structure according to the utility model may also have the following additional technical features:
[0008] In some embodiments of the present invention, the nozzle portion is connected to the main body portion, the grabbing portion is connected to a side of the nozzle portion away from the main body portion, and along the radial direction of the cold filling nozzle, the grabbing portion is located on one side of the flow channel structure.
[0009] In some embodiments of the present invention, a side surface of the material grabbing portion facing away from the main body portion and a side surface of the main body portion facing away from the main body portion are located in the same plane.
[0010] In some embodiments of the utility model, the injection mold structure also includes a stripper plate, which is sleeved outside the nozzle portion and abuts against one side of the main body portion. The stripper plate can move along the main body portion toward the grabbing portion. The stripper plate is passed through one end of the grabbing portion away from the main body, and there is a gap between the stripper plate and the grabbing portion.
[0011] In some embodiments of the present invention, the injection mold structure also includes a fixing plate, which is arranged on a side of the main body away from the grabbing portion, and has a second feed cavity therein, and the first feed cavity and the second feed cavity are connected.
[0012] In some embodiments of the present invention, the injection mold structure also includes a mother mold plate and a mother mold core, the mother mold plate is against the fixed plate and has a accommodating cavity inside, the cold filling nozzle and the stripping plate are both located in the accommodating cavity, at least part of the mother mold core is located in the accommodating cavity and connected to the mother mold plate, and the mother mold core is against the side of the stripping plate facing away from the cold filling nozzle.
[0013] In some embodiments of the present invention, the cross-sectional area of the grabbing portion increases gradually along the direction from the main body portion toward the grabbing portion.
[0014] In some embodiments of the present invention, a flow cross-section of the first feed cavity decreases gradually along the direction from the main body to the gripping portion.
[0015] In some embodiments of the present invention, a plurality of the material grabbing parts are provided, and the plurality of the material grabbing parts are arranged at intervals.
[0016] The second aspect of the utility model provides a three-plate mold having the above-mentioned injection mold structure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0018] Figure 1 The schematic diagram of the structure of the injection mold according to the embodiment of the utility model is schematically shown.
[0019] The reference numerals in the accompanying drawings represent the following:
[0020] 100. Injection mold structure;
[0021] 11. Main body; 121. Connecting part; 122. Main body; 13. Grabbing part; 14. First feeding cavity; 15. Flow channel structure;
[0022] 20. Stripping plate;
[0023] 30. Fixed plate;
[0024] 41. mother mold plate; 411. receiving cavity; 42. mother mold core;
[0025] 50. Rice cake;
[0026] 60. Products. DETAILED DESCRIPTION
[0027] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0028] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0029] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0030] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0031] As an important molding method, injection molding is widely used in the fields of machinery, chemical industry, transportation, instrumentation, household appliances, etc., and the parts produced are characterized by high precision, high complexity, high consistency, high production efficiency and low energy consumption, and have broad market demand and development prospects. Injection molds are an important process equipment for plastic molding, known as the "mother of industry", and their development level has become an important indicator of the level of a country's plastic product manufacturing industry.
[0032] Three-plate mold generally refers to a fine gate mold with an extra stripper plate. When the product uses a point gate, a three-plate mold structure must be used for molding. Generally, the material rake length of a three-plate mold is much longer than that of a two-plate mold, so the utilization rate of plastic raw materials in a three-plate mold is lower than that of a two-plate mold. The advantages of a three-plate mold are: no scissors are needed to cut the gate, only a small dot is left on the surface of the product, which is suitable for products with low injection pressure and high appearance requirements.
[0033] With the development of micro injection molding, injection molding is developing in the direction of lightweight, miniaturization, short cycle, energy saving and environmental protection. Limited by the mold capacity of the micro injection molding machine itself, the three-plate mold needs to be opened enough during the production process to realize the material rake, which has more stringent requirements on the mold size. The existing three-plate mold is composed of multiple split components such as grabbing needles, fixing plates, cold filling nozzles, stripping plates and material saving blocks. The overall production cost is high and the overall assembly time is long.
[0034] Figure 1 The structure diagram of the injection mold structure according to the embodiment of the utility model is schematically shown. Figure 1As shown, the utility model proposes an injection mold structure 100 and a three-plate mold. The injection mold structure 100 in the utility model includes a cold filling nozzle, which includes a main body 11, a material grabbing part 13 and a nozzle part. The nozzle part and the material grabbing part 13 are respectively arranged on the same side of the main body 11. The main body 11 has a first feed cavity 14, and the nozzle part has a flow channel structure 15. The first feed cavity 14 and the flow channel structure 15 are connected. The main body 11, the material grabbing part 13 and the nozzle part are an integrated molding structure.
[0035] According to the injection mold structure 100 of the utility model, the grabbing part 13 and the nozzle part are respectively integrated on the main body 11, so that the cold filling nozzle can let the material pass through the first feeding cavity 14 and the flow channel structure 15 in sequence to achieve the purpose of feeding. The grabbing part 13 can also be used to pull and fix the shaped material cake 50 when the product 60 is formed, thereby improving the stability of the injection molding process. The utility model integrates the grabbing needle and the cold filling nozzle into one, saving the cost and time of making the two components.
[0036] In some embodiments of the present invention, Figure 1 As shown, in some embodiments of this utility model, Figure 1 As shown, the nozzle portion is connected to the main body portion 11, the grabbing portion 13 is connected to a side of the nozzle portion away from the main body portion 11, and along the radial direction, the grabbing portion 13 is located at one side of the flow structure.
[0037] Specifically, Figure 1 As shown, the nozzle portion includes a connecting portion 121 and a main body 122, the connecting portion 121 and the main body 122 are connected along the radial direction of the cold filling nozzle, the main body 122 has a flow channel structure 15, and the material grabbing portion 13 is arranged on the side of the connecting portion 121 away from the main body 11, and the material grabbing portion 13 and the main body 122 are arranged at intervals along the radial direction of the cold filling nozzle. In this embodiment, the main body 122 is provided with a flow channel structure 15 for the material to pass through and shape, the connecting portion 121 is used to connect and support the material grabbing portion 13, the material grabbing portion 13 is arranged on the connecting portion 121 and is spaced from the main body 122, and is used to separate the material grabbing needle and the main body 122, which can facilitate the filling of the stripping plate 20 on the one hand, so that the material will not penetrate into the innermost part of the gap space, which is convenient for the subsequent stripping of the shaped material cake 50, and improves reliability. On the other hand, it can facilitate part of the material to flow to the end of the gripping portion 13 away from the main body 11, so that the gripping portion 13 can grip and fix the shaped material cake 50, thereby improving the stability to a certain extent.
[0038] In some embodiments of the present invention, a plurality of gripping parts 13 are provided, and the plurality of gripping parts 13 are arranged at intervals. In this embodiment, a plurality of gripping parts 13 can be used to grip and fix the shaped material cake 50, thereby achieving multi-point fixation of the material cake 50, and improving the convenience of removing the material cake 50.
[0039] In some embodiments of the present invention, Figure 1 As shown, the side of the gripping portion 13 away from the main body 11 and the side of the main body 122 away from the main body 11 are located in the same plane. In this embodiment, the side of the gripping portion 13 away from the main body 11 and the side of the main body 122 away from the main body 11 are respectively arranged parallel to the horizontal plane, which can ensure that the gripping portion 13 and the main body 122 correspond to the female mold core 42 respectively, thereby realizing the control of the shape of the material cake 50.
[0040] In some embodiments of the present invention, Figure 1 As shown, the injection mold structure 100 also includes a stripper plate 20, which is sleeved outside the nozzle portion and abuts against one side of the main body 11. The stripper plate 20 can move along the main body 11 toward the grabbing portion 13. The stripper plate 20 is passed through one end of the grabbing portion 13 away from the main body 11, and there is a gap between the stripper plate 20. In this embodiment, the stripper plate 20 can perform a stripping operation on the shaped material cake 50. The stripper plate 20 is sleeved outside the nozzle portion and can perform a circumferential positioning operation on the nozzle portion and the cold filling nozzle. One end of the grabbing portion 13 can pass through the stripper plate 20 and connect and fix the shaped material cake 50 located in the mother mold core 42, so as to facilitate the removal of the product 60 of the mother mold core 42.
[0041] Specifically, in this embodiment, the stripping plate 20 is a component that integrates the two functions of stripping and material saving. On the one hand, it can perform stripping operations on the material cake 50, and on the other hand, it reduces the distance between the end of the flow channel structure 15 away from the fixed plate 30 and the side of the mother mold core 42 away from the fixed plate 30, thereby reducing the overall length of the material cake 50, reducing the generation of waste, and at the same time improving the utilization rate of raw materials.
[0042] In some embodiments of the present invention, Figure 1 As shown, the injection mold structure 100 also includes a fixing plate 30, which is arranged on the side of the main body 11 away from the material grabbing portion 13, and has a second feed cavity in the fixing plate 30, and the first feed cavity 14 is connected to the second feed cavity. In this embodiment, the fixing plate 30 is used to fix the cold filling nozzle, and the second feed cavity of the fixing plate 30 is connected to the first feed cavity 14, so that the material can be fed through the second feed cavity and the first feed cavity 14.
[0043] In some embodiments of the present invention, Figure 1 As shown, the injection mold structure 100 also includes a mother mold plate 41 and a mother mold core 42. The mother mold plate 41 abuts against the fixed plate 30 and has an accommodating cavity 411 inside. The cold filling nozzle and the stripper plate 20 are both located in the accommodating cavity 411. At least part of the mother mold core 42 is located in the accommodating cavity 411 and is connected to the mother mold plate 41. The mother mold core 42 abuts against the side of the stripper plate 20 away from the cold filling nozzle. In this embodiment, the mother mold plate 41 directly abuts against the fixed plate 30, which can reduce the thickness of the overall injection mold structure 100, reserve sufficient mold opening, provide sufficient space for the robot to take the product 60 and the material rake, and realize mass production of the product 60. A stripping plate 20 and a material saving block are respectively sandwiched between the existing fixed plate 30 and the mother template 41, so that the thickness of the existing injection mold structure 100 is relatively large. The stripping plate 20 and the cold filling nozzle in the utility model are both located in the accommodating cavity 411 of the mother template 41, and the mother template 41 is directly abutted against the fixed plate 30, which can better reduce the thickness of the overall injection mold structure 100, thereby reducing the length of the material cake 50 during the material injection process, thereby improving the utilization rate of the raw materials.
[0044] In some embodiments of the present invention, Figure 1 As shown, the cross-sectional area of the gripping portion 13 increases along the direction from the main body 11 to the gripping portion 13. In this embodiment, since there is a gap between the circumferential direction of the end of the gripping portion 13 away from the main body 11 and the stripping plate 20, the material can flow here, and since the cross-sectional area of the gripping portion 13 increases along the direction from the main body 11 to the gripping portion 13, the shaped material cake 50 can be stuck on the gripping portion 13, and due to the clamping force between the gripping portion 13 and the material cake 50, when the injection mold structure 100 first detaches the product 60, it will not affect the material cake 50, thereby improving reliability.
[0045] In some embodiments of the present invention, Figure 1 As shown, the flow cross section of the first feed cavity 14 along the main body 11 (a plane perpendicular to the axis of the cold filling nozzle) decreases toward the direction of the gripping portion 13. In this embodiment, since the first feed cavity 14 is located above the flow channel structure 15, the above arrangement enables the first feed cavity 14 to squeeze the material in the flow channel structure 15, thereby accelerating the flow rate of the flow channel structure 15, improving the speed of material circulation, and thus improving the operating efficiency.
[0046] Furthermore, in this utility model, the operation process of the injection mold structure 100 is as follows: the mother template 41 is pre-adapted to the fixed plate 30, and the opposite ends of the stripper plate 20 are respectively connected to the cold filling nozzle and the mother mold core 42, and the sealing performance can be ensured between the second feed cavity, the first feed cavity 14, the flow channel structure 15 and the discharge cavity. The operator injects the molten material for injection molding into the second feed cavity, and then passes through the first feed cavity 14, the flow channel structure 15 and the discharge cavity in sequence, and the shaping operation will be completed after a certain period of time. After that, the mother template 41 and the mother mold core 42 are first moved in the direction away from the fixed plate 30. At this time, the shaped product 60 on the side of the mother mold core 42 away from the fixed plate 30 will be separated, and then the stripper plate 20 is moved in the direction away from the fixed plate 30, so that the material cake 50 can be separated, thereby completing the separation operation. If the injection molding operation needs to be performed again, the above operation can be repeated.
[0047] The utility model also provides a three-plate mold having the above-mentioned injection mold structure 100 .
[0048] According to the injection mold structure 100 of the utility model, the grabbing part 13 and the nozzle part are respectively integrated on the main body 11, so that the cold filling nozzle can let the material pass through the first feeding cavity 14 and the flow channel structure 15 in sequence to achieve the purpose of feeding. The grabbing part 13 can also be used to pull and fix the shaped material cake 50 when the product 60 is formed, thereby improving the stability of the injection molding process. The utility model integrates the grabbing needle and the cold filling nozzle into one, saving the cost and time of making the two components.
[0049] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An injection mold structure, characterized in that: It includes a cold filling nozzle, which includes a main body, a grabbing part and a nozzle part. The nozzle part and the grabbing part are respectively arranged on the same side of the main body. The main body has a first feed cavity, and the nozzle part has a flow channel structure. The first feed cavity and the flow channel structure are connected. The main body, the grabbing part and the nozzle part are an integrally formed structure.
2. The injection mold structure according to claim 1, characterized in that: The nozzle part is connected to the main body part, the grabbing part is connected to a side of the nozzle part away from the main body part, and along the radial direction of the cold pouring nozzle, the grabbing part is located on one side of the flow channel structure.
3. The injection mold structure according to claim 2, characterized in that: A side surface of the material grabbing portion facing away from the main body portion and a side surface of the main body portion facing away from the main body portion are located in the same plane.
4. The injection mold structure according to claim 1, characterized in that: The injection mold structure also includes a stripper plate, which is sleeved outside the nozzle portion and abuts against one side of the main body portion. The stripper plate can move along the main body portion toward the grabbing portion. The stripper plate is passed through one end of the grabbing portion away from the main body, and there is a gap between the stripper plate and the grabbing portion.
5. The injection mold structure according to claim 4, characterized in that: The injection mold structure also includes a fixing plate, which is arranged on a side of the main body away from the material grabbing portion. A second feed cavity is formed in the fixing plate, and the first feed cavity is connected to the second feed cavity.
6. The injection mold structure according to claim 5, characterized in that: The injection mold structure also includes a mother mold plate and a mother mold core. The mother mold plate is against the fixed plate and has a accommodating cavity inside. The cold filling nozzle and the stripper plate are both located in the accommodating cavity. At least part of the mother mold core is located in the accommodating cavity and is connected to the mother mold plate. The mother mold core is against the side of the stripper plate facing away from the cold filling nozzle.
7. The injection mold structure according to claim 1, characterized in that: Along the direction from the main body to the grabbing portion, the cross-sectional area of the grabbing portion increases gradually.
8. The injection mold structure according to claim 1, characterized in that: The flow cross section of the first feeding cavity decreases gradually along the direction from the main body to the grabbing portion.
9. The injection mold structure according to claim 1, characterized in that: There are multiple material grabbing parts, and the multiple material grabbing parts are arranged at intervals.
10. A three-plate mold, characterized in that: The invention has an injection mold structure according to any one of claims 1 to 9.