Injection mold and injection molding system

Abstract

The utility model provides an injection mold and an injection system, and relates to the technical field of mold equipment, the injection mold comprises a lower mold, a guide pillar assembly, an upper mold and a liquid guide piece, a first guide column groove is formed in the lower mold; one end of the guide column assembly is inserted into the first guide column groove; the end, away from the first guide column groove, of the guide column assembly is inserted into the second guide column groove, so that the mold upper mold is slidably connected with the mold lower mold through the guide column assembly, and a first injection molding opening is formed in the mold upper mold; one end of the liquid guide piece is communicated with the first injection molding opening; the cavity is of a bent structure, the end, away from the first injection molding opening, of the liquid guide piece communicates with a second injection molding opening of the cavity, and the second injection molding opening is located at one end of the cavity. According to the injection mold, PP materials can be adopted for producing injection test products through the injection mold, the space utilization rate of the cavity of the bent structure is high, and pressure fluctuation loss in the flowing process of injection liquid can be reduced, so that possible appearance defects of the products can be predicted and reflected in advance.

Description

Technical Field

[0001] The utility model relates to the technical field of mold equipment, and more specifically, to an injection mold and an injection system. Background Art

[0002] An injection mold is a key tool in the production of plastic products, determining the shape, size, appearance and performance of the products. After the injection mold is opened, it is found that the products are prone to appearance defects. At this time, the development stage task has been completed after the mold is opened, and it is difficult to re-adjust and change, thus affecting the product quality of the final injection test products. Summary of the Utility Model

[0003] The purpose of the utility model is to provide an injection mold and an injection system, which can produce injection test products with PP - type materials through the injection mold to predict and reflect the possible appearance defects of the products in advance.

[0004] The first aspect of the utility model provides an injection mold, which includes a lower mold, a guide post assembly, an upper mold and a liquid guide member.

[0005] Lower mold, a first guide post groove is formed in the lower mold;

[0006] Guide post assembly, one end of the guide post assembly is inserted into the first guide post groove;

[0007] Upper mold, a second guide post groove is formed in the upper mold, and the end of the guide post assembly far from the first guide post groove is inserted into the second guide post groove, so that the upper mold is slidably connected to the lower mold through the guide post assembly. A first injection port is formed in the upper mold;

[0008] Liquid guide member, one end of the liquid guide member is communicated with the first injection port;

[0009] When the upper mold and the lower mold are closed, the upper mold and the lower mold are abutted against each other to define a cavity. The cavity has a bending structure. The end of the liquid guide member far from the first injection port is communicated with a second injection port of the cavity, and the second injection port is located at one end of the cavity.

[0010] In a possible embodiment of the utility model, the bending structure at least includes a first bending part and a second bending part, and the bending directions of the first bending part and the second bending part are opposite.

[0011] In a possible embodiment of the utility model, both the first bending part and the second bending part are U - shaped structures.

[0012] In a possible embodiment of the present utility model, a plurality of scale marks are provided on the cavity, and the plurality of scale marks are arranged around the periphery of the cavity.

[0013] In a possible embodiment of the present utility model, an upper cavity is provided in the upper mold of the mold, a lower cavity is provided in the lower mold of the mold, and the upper cavity and the lower cavity can jointly form the cavity.

[0014] In a possible embodiment of the present utility model, the upper mold of the mold and the lower mold of the mold are arranged in parallel.

[0015] In a possible embodiment of the present utility model, the guide post assembly includes a plurality of guide post members, and the liquid guide member is arranged in parallel with any one of the guide post members.

[0016] In a possible embodiment of the present utility model, opposite ends of any one of the guide post members are respectively arranged in a first guide post groove and a second guide post groove.

[0017] In a possible embodiment of the present utility model, an insert is provided at one end of the liquid guide member close to the cavity, the liquid guide member is communicated with the second injection port through the insert, and the insert is detachably connected to the liquid guide member.

[0018] A second aspect of the present utility model provides an injection molding system, including an injection molding test product. The injection molding system further includes the injection molding mold described in any one of the above embodiments, and the injection molding mold is used to produce the injection molding test product.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: An injection molding mold and an injection molding system provided by the present utility model can be used before the shape of the mold opening is determined. Through the injection molding mold, injection molding test products can be produced using PP-based materials. However, appearance defects may occur during the injection molding process of PP-based injection molding products, such as defects in the form of tiger skin-shaped patterns. A cavity with a curved structure is used to produce injection molding test products. The cavity with a curved structure has a high space utilization rate and can reduce the pressure fluctuation loss during the flow of the injection liquid, facilitating personnel to timely detect the appearance defects generated in the injection molding test products at the early test stage of mold opening, so as to predict and reflect in advance the possible appearance defects of the products, facilitate the adjustment of the injection liquid ratio and the production process, timely optimize the performance, reduce the product development cycle, and save the development cost. Description of the Drawings

[0020] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the three-dimensional structure of an injection mold provided in some embodiments of the present utility model Figure 1 ;

[0022] Figure 2 Schematic diagram of the three-dimensional structure of an injection mold provided in some embodiments of the present utility model Figure 2 ;

[0023] Figure 3 Schematic diagram of the three-dimensional structure of the lower mold of an injection mold provided in some embodiments of the present utility model.

[0024] Description of main component symbols;

[0025] 100 - injection mold; 110 - lower mold; 111 - first guide post groove; 120 - guide post assembly; 121 - guide post part; 130 - upper mold; 131 - first injection port; 132 - second guide post groove; 140 - liquid guiding part; 141 - insert; 150 - cavity; 151 - first bending part; 152 - second bending part; 153 - second injection port; 200 - injection test product. Specific embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0028] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is habitually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be construed as indicating or implying relative importance.

[0030] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] The following will describe in detail some embodiments of the present utility model with reference to the drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0033] Embodiment 1

[0034] Refer to Figure 1 As shown, an embodiment of the present application provides an injection mold 100, which includes a mold lower die 110, a guide post assembly 120, a mold upper die 130, and a liquid guide member 140.

[0035] Specifically, in combination with Figure 2 and Figure 3As shown, a first guide post groove 111 is formed in the lower die 110 of the mold; one end of the guide post assembly 120 is inserted into the first guide post groove 111; a second guide post groove 132 is formed in the upper die 130 of the mold, and the end of the guide post assembly 120 away from the first guide post groove 111 is inserted into the second guide post groove 132, so that the upper die 130 of the mold is slidably connected to the lower die 110 of the mold through the guide post assembly 120. A first injection port 131 is formed in the upper die 130 of the mold; one end of the liquid guide member 140 is communicated with the first injection port 131. Accordingly, the injection liquid can flow into the liquid guide member 140 through the first injection port 131, flow out from the second injection port 153 to the cavity 150, and gradually fill all areas of the cavity 150, so as to form an injection product when the mold is closed.

[0036] In this embodiment, when the upper die 130 of the mold is closed with the lower die 110 of the mold, the upper die 130 of the mold abuts against the lower die 110 of the mold and defines a cavity 150. The cavity 150 has a curved structure. One end of the liquid guide member 140 away from the first injection port 131 is communicated with a second injection port 153 of the cavity 150. The second injection port 153 is located at one end of the cavity 150. Through the injection mold 100, an injection test product 200 can be produced using a PP-based material. However, appearance defects may occur during the injection process of the injection product made of the PP-based material, such as defects of the tiger skin-shaped texture type. The cavity 150 with a curved structure is used to produce the injection test piece. The cavity 150 with a curved structure has a high space utilization rate and can reduce the pressure fluctuation loss during the flow of the injection liquid, facilitating personnel to timely discover the appearance defects generated in the injection test product 200 in the early test stage of mold opening, so as to predict and reflect the possible appearance defects of the product in advance, facilitate the adjustment of the ratio of the injection liquid and the production process, and timely optimize the performance, reducing the product development cycle.

[0037] It can be understood that there are appearance defects of the tiger skin-shaped texture type in many injection products made of PP-based materials on the market at present. However, the tiger skin texture defects can only be discovered in the middle and late stages of product research and development. At this time, the preliminary preparation work for mold development and production has been completed, and the relevant material test stage has also been completed. Therefore, the adopted solution can solve the problem that the appearance defects of the tiger skin texture can be discovered in time at the early stage, so as to test according to the injection test product 200 produced by the injection mold 100 of the present application, so as to timely discover the appearance defects and make adjustments and optimizations.

[0038] It should be noted that refer to Figures 1 to 3As shown, the first direction X is taken as an example of the length direction of the injection mold 100, the second direction Y is taken as an example of the width direction of the injection mold 100, and the third direction Z is taken as an example of the height direction of the injection mold 100. Among them, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other pairwise. It can be understood that the above definitions are only for facilitating the understanding of the relative position relationship of the injection mold 100 and should not be construed as a limitation to the present application.

[0039] In one embodiment, optionally, the cavity 150 is provided with a plurality of scale marks, and the plurality of scale marks are arranged around the periphery of the cavity 150. The scale marks are used to display the positions where appearance defects such as tiger stripes occur, accurately test and identify appearance defects such as tiger stripes, and record data such as the positions where appearance defects such as tiger stripes occur, which is used to evaluate the conditions for appearance defects to occur on the injection product, and can adjust and optimize the materials and shapes of the product in advance, improving the subsequent production stability of the injection product.

[0040] In one embodiment, optionally, refer to Figure 2 and Figure 3 As shown, the upper mold 130 of the mold is provided with an upper cavity, and the lower mold 110 of the mold is provided with a lower cavity. The upper cavity and the lower cavity can jointly form the cavity 150. Along the third direction, the upper cavity can move relative to the lower cavity, and the upper cavity and the lower cavity are closely matched. When molten plastic is injected into the cavity 150 through the liquid guiding member 140 and then cooled and solidified, an injection product with a predetermined shape is formed. Exemplarily, the upper mold 130 of the mold is a movable mold, and the lower mold 110 of the mold is a fixed mold. When the mold is opened, the upper cavity of the upper mold 130 moves along the third direction, separating the upper cavity of the upper mold 130 and the lower cavity of the lower mold 110, and the injection product is pushed out of the cavity 150 along with the ejector.

[0041] In one embodiment, optionally, refer to Figure 1 and Figure 2 As shown, the guide post assembly 120 includes a plurality of guide post members 121, and the liquid guiding member 140 is arranged parallel to any one of the guide post members 121. The guide post members 121 not only guide the injection mold 100 during mold closing but also can keep the upper mold 130 and the lower mold 110 in a parallel state, reducing the occurrence of parallel deviation. The liquid guiding member 140 is used to realize the diversion of the injection liquid.

[0042] In summary, the injection mold 100 can be used before the shape of the mold is determined during mold opening. Through the injection mold 100, injection test products 200 can be produced using PP-based materials. However, appearance defects may occur during the injection molding process of PP-based injection products, such as defects of the tiger skin pattern type. The cavity 150 with a bending structure is used to produce injection test products. The cavity 150 with a bending structure has a high space utilization rate and can reduce the pressure fluctuation loss during the flow of the injection liquid, facilitating personnel to timely detect the appearance defects generated in the injection test product 200 during the early mold opening test stage, so as to predict and reflect in advance the possible appearance defects of the product, facilitate the adjustment of the injection liquid ratio and the production process, timely optimize the performance, reduce the product development cycle, and save the development cost.

[0043] Embodiment 2

[0044] Reference Figures 1 to 3 As shown, the embodiment of the present application provides another injection mold 100, which includes a mold lower die 110, a guide pillar assembly 120, a mold upper die 130, and a liquid guiding member 140.

[0045] Specifically, in combination with Figure 2 and Figure 3As shown, a first guide post groove 111 is provided on the lower die 110 of the mold; one end of the guide post assembly 120 is inserted into the first guide post groove 111; a second guide post groove 132 is provided on the upper die 130 of the mold, and the end of the guide post assembly 120 away from the first guide post groove 111 is inserted into the second guide post groove 132, so that the upper die 130 of the mold is slidably connected to the lower die 110 of the mold through the guide post assembly 120. A first injection port 131 is provided on the upper die 130 of the mold; one end of the liquid guide member 140 is communicated with the first injection port 131. Correspondingly, the injection liquid can flow into the liquid guide member 140 through the first injection port 131, flow out from the second injection port 153 to the cavity 150, and gradually fill all areas of the cavity 150. When the upper die 130 of the mold is closed with the lower die 110 of the mold, the upper die 130 of the mold abuts against the lower die 110 of the mold and defines the cavity 150. The cavity 150 has a curved structure. The end of the liquid guide member 140 away from the first injection port 131 is communicated with the second injection port 153 of the cavity 150. The second injection port 153 is located at one end of the cavity 150. Through the injection mold 100, injection test products 200 can be produced using PP-based materials. However, appearance defects may occur during the injection molding process of PP-based injection products, such as defects of the tiger skin shape pattern type. The cavity 150 with a curved structure is used to produce injection test products. The cavity 150 with a curved structure has a high space utilization rate and can reduce the pressure fluctuation loss during the flow of the injection liquid, facilitating personnel to timely detect the appearance defects generated in the injection test products 200 at the early test stage of mold opening, so as to predict and reflect in advance the possible appearance defects of the products, facilitate the adjustment of the injection liquid ratio and production process, timely optimize the performance, and reduce the product development cycle.

[0046] It should be noted that with reference to Figures 1 to 3 As shown, the first direction X takes the length direction of the injection mold 100 as an example, the second direction Y takes the width direction of the injection mold 100 as an example, and the third direction Z takes the height direction of the injection mold 100 as an example. Among them, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs.

[0047] In one embodiment, optionally, the curved structure at least includes a first curved portion 151 and a second curved portion 152. The bending directions of the first curved portion 151 and the second curved portion 152 are opposite. The bending directions should facilitate the manufacturing process, be reasonably arranged, improve the space utilization efficiency, enable the first curved portion 151 and the second curved portion 152 to effectively disperse external forces, reduce the complexity of mold design, and be used for the test and simulation of injection products.

[0048] Optionally, as Figure 3As shown, both the first bending portion 151 and the second bending portion 152 are U-shaped structures, which are used to meet specific functional requirements, enabling the injection liquid to fill the entire cavity 150 through the second injection port 153. The first bending portion 151 and the second bending portion 152 of the U-shaped structure reduce the power loss during the flow of the injection liquid, simulating the appearance scenarios of appearance defects such as tiger skin patterns during the actual production process.

[0049] In one embodiment, optionally, the cavity 150 is provided with a plurality of scale marks, which are arranged around the perimeter of the cavity 150. The scale marks are used for the size control of the injection molded product or as a visual reference when the product is in use, and can display the positions where appearance defects such as tiger skin patterns occur, accurately test and identify the appearance defects such as tiger skin patterns, and record data such as the positions where the appearance defects such as tiger skin patterns occur, for evaluating the conditions under which appearance defects occur on the injection molded product, and can make adjustments and optimizations to the materials and shapes of the product in advance, improving the subsequent production stability of the injection molded product. Correspondingly, the plurality of scale marks are arranged at intervals, facilitating the staff to clearly identify and read the scale marks, and ensuring the size, spacing and clarity of the scales. Exemplarily, the scale marks include 100mm, 200mm, 300mm, 400mm, 500mm and 600mm, and the scale marks can adopt an etched structure or a carved structure.

[0050] In one embodiment, optionally, refer to Figure 2 and Figure 3 As shown, the upper die 130 of the mold is provided with an upper cavity, and the lower die 110 of the mold is provided with a lower cavity. The upper cavity and the lower cavity can jointly form the cavity 150. The upper cavity and the lower cavity are closely fitted. After injecting molten plastic into the cavity 150 through the liquid guiding member 140 and then cooling and solidifying, an injection molded product of a predetermined shape is formed. Exemplarily, the upper die 130 of the mold is a movable die, and the lower die 110 of the mold is a fixed die. When the mold is opened, the upper cavity of the upper die 130 moves in the third direction, separating the upper cavity of the upper die 130 and the lower cavity of the lower die 110, and the injection molded product is pushed out of the cavity 150 along with the ejector.

[0051] Optionally, as Figure 2 shown, the upper die 130 of the mold and the lower die 110 of the mold are arranged in parallel, which is conducive to manufacturing injection molded products of higher quality, enabling the upper die 130 of the mold and the lower die 110 of the mold to have higher fitting accuracy. Relatively small deviations may affect the dimensional accuracy and surface quality of the injection molded product, reducing the occurrence of flash or unstable dimensions of the injection molded product. The first direction X and the second direction Y can form an X-Y plane, and both the upper die 130 of the mold and the lower die 110 of the mold are parallel to the X-Y plane.

[0052] In one embodiment, optionally, refer toFigure 1 and Figure 2 As shown, the guide post assembly 120 includes a plurality of guide post members 121. The liquid guide member 140 is arranged in parallel with any one of the guide post members 121. The guide post member 121 not only guides the injection mold 100 during mold closing, but also can keep the upper mold 130 and the lower mold 110 of the mold in a parallel state, reducing the occurrence of parallel deviation. The liquid guide member 140 is used to realize the diversion of the injection liquid. Exemplarily, the liquid guide member 140 is a liquid guide pipe. The liquid guide pipe and any one of the guide post members 121 are both arranged along the third direction Z in parallel. The first direction X and the second direction Y can form an X - Y plane, and the X - Y plane is perpendicular to the liquid guide pipe and the guide post member 121 respectively. When injecting the injection liquid through the liquid guide pipe, the injection pressure is 80 bar and the injection speed is 30 mm / s.

[0053] Optionally, referring to Figure 2 and Figure 3 As shown, the opposite ends of any one of the guide post members 121 are respectively arranged in a first guide post groove 111 and a second guide post groove 132. Further, the guide post member 121 can connect the upper mold 130 and the lower mold 110 of the mold respectively, playing a role in guiding and supporting, and is a key component to ensure the accurate alignment of the upper mold 130 and the lower mold of the mold. Correspondingly, a plurality of guide post members 121 are evenly distributed on the four sides of the injection mold 100, which can support the weight of the mold enough and keep the injection mold 100 stable, ensuring the smooth opening and closing of the injection mold 100 and reducing the eccentric load.

[0054] Optionally, as Figure 3 shown, one end of the liquid guide member 140 close to the cavity 150 is provided with an insert 141. The liquid guide member 140 is connected to the second injection port 153 through the insert 141. The insert 141 is detachably connected to the liquid guide member 140. The insert 141 is a component embedded in the mold, mainly used to form complex shapes that the mold cannot directly process or parts that require special materials. The insert 141 realizes the complex geometric structure in the injection product, and the insert 141 can be replaced according to needs. Further, the insert 141 is provided with a gate, and the gate can introduce the injection liquid into the cavity 150 through the second injection port 153. Exemplarily, the gate can be one of an edge gate, a pin gate, and a submarine gate.

[0055] Embodiment 3

[0056] The embodiment of the present utility model further provides an injection system, including an injection test product 200. The injection system further includes the injection mold 100 in Embodiment 1 or Embodiment 2. The injection mold 100 is used to produce the injection test product 200. The injection system including the injection mold 100 has all the beneficial effects of the injection mold 100, which will not be elaborated here in detail.

[0057] In all the examples shown and described herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0058] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several variations and improvements can still be made, and these all fall within the protection scope of the present utility model.

Claims

1. An injection mold, characterized in that: include: A mold lower mold, wherein the mold lower mold is provided with a first guide column groove; A guide post assembly, one end of which is plugged into the first guide post slot; A mold upper mold, wherein the mold upper mold is provided with a second guide post groove, and one end of the guide post assembly away from the first guide post groove is plugged into the second guide post groove, so that the mold upper mold is slidably connected with the mold lower mold through the guide post assembly, and the mold upper mold is provided with a first injection port; A liquid guiding member, one end of which is connected to the first injection port; When the upper mold and the lower mold are closed, the upper mold and the lower mold abut against each other and define a cavity, the cavity has a curved structure, and the end of the liquid guide part away from the first injection port is connected to the second injection port of the cavity, and the second injection port is located at one end of the cavity.

2. The injection mold according to claim 1, characterized in that: The bending structure at least includes a first bending portion and a second bending portion, and a bending direction of the first bending portion is opposite to a bending direction of the second bending portion.

3. The injection mold according to claim 2, characterized in that: The first curved portion and the second curved portion are both U-shaped structures.

4. The injection mold according to claim 1, characterized in that: The mold cavity is provided with a plurality of scale marks, and the plurality of scale marks are arranged around the mold cavity.

5. The injection mold according to any one of claims 1 to 4, characterized in that: The upper mold of the mold is provided with an upper cavity, and the lower mold of the mold is provided with a lower cavity. The upper cavity and the lower cavity can together constitute the mold cavity.

6. The injection mold according to claim 5, characterized in that: The upper mold and the lower mold are arranged in parallel.

7. The injection mold according to any one of claims 1 to 4, characterized in that: The guide column assembly includes a plurality of guide column members, and the liquid guiding member is arranged in parallel with any one of the guide column members.

8. The injection mold according to claim 7, characterized in that: The opposite ends of any one of the guide pillar members are respectively arranged in one of the first guide pillar grooves and one of the second guide pillar grooves.

9. The injection mold according to claim 7, characterized in that: An insert is provided at one end of the liquid guiding member close to the mold cavity, the liquid guiding member is connected with the second injection port through the insert, and the insert is detachably connected to the liquid guiding member.

10. An injection molding system, comprising an injection molding test product, characterized in that: It also comprises the injection mold according to any one of claims 1 to 9, wherein the injection mold is used to produce the injection molded test product.

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