Injection mold with U-shaped reverse glue inlet runner structure

Abstract

The utility model relates to an injection mold with a U-shaped reverse glue inlet runner structure, which comprises a fixed mold core and a movable mold core which are opposite left and right, the front side wall of the fixed mold core is provided with an injection molding area, a first runner groove and a flow guide block positioned between the first runner groove and the injection molding area, and one end of the flow guide block extends to the injection molding area; a containing groove for containing the flow guide block is formed in the front side wall of the fixed mold core, a flow guide channel and a flow guide groove communicating with the first runner groove are formed in the upper surface of the flow guide block, the flow guide channel is in a U shape and is vertically arranged, and the two ends of the flow guide channel communicate with the flow guide groove and the injection molding area correspondingly; inner cavity forming tables are arranged on the injection molding area and located on the two sides of the flow guide channel. An injection molding groove is formed in the position, corresponding to the injection molding area, of the movable mold core. In the injection molding process, through cooperation of the flow guide groove and the flow guide channel with the first runner groove, melt glue can be guided into the injection molding area and the injection molding groove, the water gap is hidden in the position of a rib at the bottom of the injection molding piece, and later trimming is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, especially a kind of injection mold with U-shaped reverse glue feeding runner structure. BACKGROUND

[0002] Mold, various moulds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging forming, smelting, stamping and other methods. In short, mold is a tool for making shaped objects, which is composed of various parts, and different molds are composed of different parts. And the injection mold is generally composed of fixed mold, movable mold, fixed mold core and movable mold core, and ejector pin module, by injecting molten glue into the injection cavity between fixed mold core and movable mold core to form injection molded parts, the injection molded parts are ejected from the mold to achieve demolding by ejector pin module when the mold is opened.

[0003] In the daily production and processing process, the keycap injection molding of button or knob key is often encountered, the outer side of this kind of injection molding is required to be smooth and beautiful, and the inner side wall is required to be formed into cross rib for easy installation. Because of this requirement, the water gap needs to be hidden in the rib bottom surface of injection molding during mold design, and the water gap is also convenient to cut off in later period. Therefore, in order to meet many processing requirements, a kind of injection mold with U-shaped reverse glue feeding runner structure is specially designed. UTILITY MODEL CONTENT

[0004] The utility model aims at the deficiency of prior art, provides a kind of injection mold with U-shaped reverse glue feeding runner structure, the injection mold with U-shaped reverse glue feeding runner structure can be well solve the above problems.

[0005] To achieve the above requirements, the technical scheme adopted by the utility model to solve its technical problems is:

[0006] Provide a kind of injection mold with U-shaped reverse glue feeding runner structure, including the fixed mold core and movable mold core opposite left and right, the front side wall of fixed mold core is equipped with injection molding area and first runner groove, and the flow guide block between first runner groove and injection molding area, one end of flow guide block extends to injection molding area;The front side wall of fixed mold core is equipped with accommodating groove for accommodating flow guide block, the upper surface of flow guide block is equipped with flow guide channel and flow guide groove communicated with first runner groove, flow guide channel is U-shaped and vertically arranged, and the two ends of flow guide channel are communicated with flow guide groove and injection molding area respectively;The inner cavity forming table is equipped on both sides of flow guide channel on injection molding area, and injection molding groove is arranged on movable mold core corresponding to injection molding area.

[0007] The utility model discloses an injection mold with U-shaped reverse glue feeding runner structure, wherein one end of the accommodating groove extends to the injection molding area, and two opposite notches are arranged on the two inner cavity forming tables corresponding to the accommodating groove.

[0008] The utility model discloses an injection mold with U-shaped reverse glue feeding runner structure, wherein the outlet diameter of the flow guide channel is less than the inlet diameter.

[0009] The utility model discloses an injection mold with U-shaped reverse glue feeding runner structure, wherein the flow guide channel comprises a widening part and a narrowing part arranged from the inlet to the outlet; the narrowing part is in the shape of a circular truncated cone, and the larger end thereof is directly communicated with the widening part.

[0010] The utility model discloses an injection mold with U-shaped reverse glue feeding runner structure, wherein the injection mold with U-shaped reverse glue feeding runner structure further comprises a fixed mold seat for fixing the fixed mold core and a movable mold seat for fixing the movable mold core; the fixed mold seat and the movable mold seat are respectively provided with a first mounting groove and a second mounting groove corresponding to the fixed mold core and the movable mold core.

[0011] The utility model discloses an injection mold with U-shaped reverse glue feeding runner structure, wherein the flow guide block and the fixed mold core are detachably connected.

[0012] The utility model discloses an injection mold with U-shaped reverse glue feeding runner structure, wherein the lower end of the flow guide block is provided with a boss on the opposite side wall, the bottom surface of the fixed mold core is provided with a positioning groove matched with the boss, and when assembled in place, the two ends of the boss are respectively abutted against the bottom surface of the positioning groove and the first mounting groove.

[0013] The utility model discloses an injection mold with U-shaped reverse glue feeding runner structure, wherein the flow guide block comprises two flow guide block bodies closely adhering to each other, U-shaped grooves are arranged on the opposite side walls of the two flow guide block bodies, the two ends of the U-shaped grooves are respectively penetrated through one end face of the flow guide block body, and the two U-shaped grooves jointly enclose the flow guide channel; the bosses are respectively arranged on the side walls of the two flow guide block bodies away from each other.

[0014] The utility model has the advantages that when injection molding, the fixed mold core and the movable mold core are clamped, so that the injection molding groove and the injection molding area are folded to form an injection molding cavity, when the molten glue enters the flow guide groove through the first runner groove, the molten glue is further filled in the injection molding cavity on the injection molding area and between the two inner cavity forming tables through the flow guide channel, and the water gap is hidden in the bottom rib position of the injection part, which greatly facilitates the trimming of the water gap in the later stage. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application will be further described below with reference to the drawings and embodiments. The drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the premise that they do not pay creative labor:

[0016] Figure 1 is the state diagram of the flow guide block separating the lower mold core of the present application.

[0017] Figure 2 is Figure 1 is an enlarged view of the injection molding area in

[0018] Figure 3 is an exploded view of the flow guide block of the present application.

[0019] Figure 4 is an assembly drawing of the movable mold core and the movable mold seat of the present application.

[0020] Figure 5 is a front view of the assembly of the fixed mold core and the fixed mold seat of the present application.

[0021] Figure 6 is Figure 5 A-A sectional view of DETAILED DESCRIPTION

[0022] The terms "first", "second", "third", and "fourth" and the like in the description and claims of the present application and the accompanying drawings are used for distinguishing between similar objects, not necessarily for describing a particular sequential or chronological order. The terms "include" and "have" and their derivatives, mean "comprising" or "including", and are not limiting. For example, a process, method, object, or apparatus that comprises a list of steps or elements is not necessarily limited to the listed steps or elements, but can include additional steps or elements not expressly listed or inherent to such process, method, object, or apparatus.

[0023] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be combined with any of the other embodiments.

[0024] "Multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, a clear and complete description will be provided below in conjunction with the technical solutions in the embodiments of this utility model. Obviously, the described embodiments are some, but not all, embodiments of this utility model. 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.

[0026] The preferred embodiment of this utility model is an injection mold with a U-shaped reverse flow channel structure, such as... Figures 1-6 As shown, this mold includes a fixed mold core 10 and a moving mold core 20 facing each other. The front sidewall of the fixed mold core 10 is provided with an injection molding area 101 and a first runner groove 102. The moving mold core 20 is provided with a second runner groove 201 corresponding to the first runner groove 102, and the moving mold core 20 is also provided with a molten material inlet channel 202 corresponding to the second runner groove 201 and the first runner groove 102. The front sidewall of the fixed mold core 10 is also provided with a guide block 30 located between the first runner groove 102 and the injection molding area 101, with one end of the guide block 30 extending onto the injection molding area 101. The front sidewall of the fixed mold core 10 is provided with a receiving groove 104 for accommodating the guide block 30. When assembled, the upper surface of the guide block 30, located outside the injection molding area 101, is flush with the surface of the fixed mold core 10. The upper surface of the guide block 30 is provided with a guide channel 31 and a flow channel 202 connecting to the first runner groove 102. The runner 102 is connected to the guide channel 32, and the guide channel 31 is U-shaped and vertically arranged. The two ends of the guide channel 31 are connected to the guide channel 32 and the injection molding area 101, respectively. The injection molding area 101 is provided with inner cavity molding platforms 40 on both sides of the guide channel 31, and the moving mold core 20 is provided with an injection molding groove 203 corresponding to the injection molding area 101. During injection, the fixed mold core 10 and the moving mold core 20 close the mold, so that the injection molding groove 203 and the injection molding area 101 are closed to form an injection molding cavity. When the molten plastic enters the guide channel 32 through the first runner 102, it further passes through the guide channel 31 and gradually fills the entire injection molding cavity on the injection molding area 101 between the two inner cavity molding platforms 40, and hides the gate in the bottom rib position of the injection molded part, which greatly facilitates the subsequent trimming operation of the gate and ensures the clean appearance of the product.

[0027] In the embodiment, one end of the accommodating groove 104 extends to the injection molding area 101, and the two inner cavity forming platforms 40 are respectively provided with two opposite notches 41 corresponding to the accommodating groove 104. The upper surface of the flow guide block 30 is provided with two protruding filling parts 33 corresponding to the two notches 41. The two protruding filling parts 33 are located on both sides of the flow guide channel 31. When assembled in place, the protruding filling parts 33 on the flow guide block 30 are just completely filled in the notches 41, which cooperates with the inner cavity forming platform 40 to form an inner cavity on the inner side of the injection molded part. At the same time, the grooves between the two inner cavity forming platforms 40 form a convex rib, and the connecting part of the communication flow channel to the injection molding area 101 is located on the convex rib.

[0028] In the embodiment, the outlet diameter of the flow guide channel 31 is smaller than the inlet diameter, so as to reduce the diameter of the connecting part of the water gap to the injection molded part. Specifically, the flow guide channel 31 includes a widening part 311 and a narrowing part 312 arranged in the direction from the inlet to the outlet. The narrowing part 312 is in the shape of a circular truncated cone, and the larger end thereof is directly communicated with the widening part 311. This ensures that the water gap can be easily separated from the structure of the convex rib during demolding, and also facilitates the water gap ejector pin 80 on the lower mold core to easily eject the water gap in the first flow channel groove 102 when ejecting the water gap.

[0029] In the embodiment, the mold further includes a fixed mold seat 50 for fixing the fixed mold core 10, and a movable mold seat 60 for fixing the movable mold core 20. The fixed mold seat 50 and the movable mold seat 60 are respectively provided with a first installation groove 51 and a second installation groove 61 corresponding to the fixed mold core 10 and the movable mold core 20. The flow guide block 30 is detachably connected with the fixed mold core 10, so as to facilitate replacement and disassembly.

[0030] Further, the lower end of the flow guide block 30 is provided with a boss 301 on the opposite side wall. The bottom surface of the fixed mold core 10 is provided with a positioning groove 52 matched with the boss 301. When assembled in place, the two ends of the boss 301 are respectively abutted against the bottom surface of the positioning groove 52 and the first installation groove 51, so as to ensure the stability of the flow guide block 30 and prevent it from shaking. Specifically, the flow guide block 30 includes two flow guide block bodies 3a which are tightly attached to each other. The two flow guide block bodies 3a are both in the shape of a cuboid and are parallel to each other. One end of the opposite side walls of the two flow guide block bodies 3a is respectively provided with a U-shaped groove a1. The two ends of the U-shaped groove a1 are both penetrated through one end surface of the flow guide block body 3a. The two U-shaped grooves a1 jointly form the flow guide channel 31. The boss 301 is respectively located on the side wall of the two flow guide block bodies 3a which are away from each other. When installed in place, the two flow guide block bodies 3a are abutted against the inner wall of the accommodating groove 104 and tightly attached to each other.

[0031] Further, the upper surface of the movable mold seat 60 is provided with an injection inlet 62 communicated with the glue inlet flow channel 202. The injection inlet 62 and the glue inlet flow channel 202 are matched with an injection molding machine to ensure that the molten glue can smoothly enter the inside of the injection cavity.

[0032] The fixed mold base 50 is further provided with injection part ejector pins 70 for ejecting the injection molded part and separating the injection molded part from the inner cavity forming platform 40. The injection part ejector pins 70 penetrate the end face of the inner cavity forming platform 40, and each inner cavity forming platform 40 corresponds to one injection part ejector pin 70. The movable base 90 for driving the injection part ejector pins 70 and the nozzle ejector pins 80 to move up and down is arranged below the fixed mold base 50. The lower end of the fixed mold base 50 is vertically fixed with guide columns 130 penetrating the movable base 90. The movable base 90 and the fixed mold base 50 are provided with buffer springs 100, and the buffer springs 100 are sleeved on the guide columns 130. The nozzle ejector pins 80 and the injection part ejector pins 70 are fixed on the movable base 90. The movable base 90 is provided with a fixed base 110 below, and the fixed base 110 is fixed with the lower end of the guide columns 130. In the actual processing process, the movable base 90 is driven to move up and down by the driving mechanism of the injection molding machine, thereby driving the injection part ejector pins and the nozzle ejector pins to move up and down. When demolding, the injection part ejector pins 70 and the nozzle ejector pins 80 can ensure that the injection molded part is smoothly separated from the plurality of inner cavity forming columns 30.

[0033] In the embodiment, the fixed base 110 is provided with support bases 120 on both opposite sides of the movable base 90 to support the fixed mold base 50, so as to fix the fixed mold base 50 and provide a moving space for the movable base 90 to move up and down.

[0034] It should be understood that the above description is only an example, and those skilled in the art can make improvements or changes according to the above description, and all these improvements and changes shall belong to the protection scope of the appended claims of the utility model.

Claims

1. An injection mold with a U-shaped reverse flow channel structure, characterized in that, The device includes a fixed mold core and a moving mold core facing each other. The front sidewall of the fixed mold core is provided with an injection molding area and a first runner groove, as well as a guide block located between the first runner groove and the injection molding area. One end of the guide block extends to the injection molding area. The front sidewall of the fixed mold core is provided with a receiving groove to accommodate the guide block. The upper surface of the guide block is provided with a guide channel and a guide groove communicating with the first runner groove. The guide channel is U-shaped and vertically arranged. The two ends of the guide channel are respectively connected to the guide groove and the injection molding area. The injection molding area is provided with an inner cavity molding platform on both sides of the guide channel. The moving mold core is provided with an injection molding groove corresponding to the injection molding area.

2. The injection mold with a U-shaped reverse flow channel structure according to claim 1, characterized in that, One end of the receiving groove extends to the injection molding area. The two inner cavity molding platforms are provided with two opposite notches corresponding to the receiving groove. The upper surface of the guide block is provided with two protruding filling parts corresponding to the two notches. The two protruding filling parts are located on both sides of the guide channel.

3. The injection mold with a U-shaped reverse flow channel structure according to claim 2, characterized in that, The outlet diameter of the flow channel is smaller than the inlet diameter.

4. The injection mold with a U-shaped reverse flow channel structure according to claim 2, characterized in that, The flow channel includes a widening section and a narrowing section arranged from its inlet toward its outlet; the narrowing section is frustum-shaped and its larger end is directly connected to the widening section.

5. The injection mold with a U-shaped reverse flow channel structure according to claim 4, characterized in that, The injection mold with the U-shaped reverse injection channel structure further includes a fixed mold base for fixing the fixed mold core and a movable mold base for fixing the movable mold core; the fixed mold base and the movable mold base are respectively provided with a first mounting groove and a second mounting groove corresponding to the fixed mold core and the movable mold core.

6. The injection mold with a U-shaped reverse flow channel structure according to claim 5, characterized in that, The guide block is detachably connected to the fixed mold core.

7. The injection mold with a U-shaped reverse flow channel structure according to claim 6, characterized in that, The lower end of the guide block is provided with a boss on the opposite side wall. The bottom surface of the fixed mold core is provided with a positioning groove that matches the boss. When assembled, the two ends of the boss abut against the bottom surface of the positioning groove and the first mounting groove, respectively.

8. The injection mold with a U-shaped reverse flow channel structure according to claim 7, characterized in that, The flow guide block includes two flow guide block bodies that are closely attached to each other. Each of the two flow guide block bodies has a U-shaped groove on its opposite sidewall. Both ends of the U-shaped groove penetrate one end face of the flow guide block body. The two U-shaped grooves together enclose and form the flow guide channel. The boss is located on the opposite sidewall of the two flow guide block bodies.

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