Three-point pushing type lampshade injection mold

Abstract

The utility model relates to a three-point pushing type lampshade injection mold. The three-point pushing type lampshade injection mold comprises a movable mold core and a fixed mold core, an injection molding area is arranged on the upper surface of the fixed mold core, an inner cavity molding column is arranged on the injection molding area, and a narrowing part is arranged at the upper end of the inner cavity molding column; the left side and the right side of the inner cavity forming column are each provided with a first ejector pin moving hole and a first ejector pin. A second ejector pin moving hole, an ejector pin sleeve and a second ejector pin are arranged on the front side of the inner cavity forming column; the top end of the inner cavity forming column is higher than the lower end of the narrowing part; a forming groove corresponding to the injection molding area is formed in the lower surface of the movable mold core; when the mold is closed in place, the top end surfaces of the second ejector pin and the inner cavity forming column are attached to the bottom surface of the forming groove; during mold opening, through cooperation of the first ejector pin, the second ejector pin and the ejector pin sleeve, the injection molding workpiece can be ejected out of the inner cavity forming column in a multi-point mode, smooth demolding of the injection molding workpiece is guaranteed, the overall structure is simple, and the demolding effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, especially a three point formula lampshade injection mold of pushing in unison. BACKGROUND

[0002] Mold, industrial production is used to injection, blow molding, extrusion, die casting or forging pressure forming, smelting, stamping and other methods to get the desired products of various molds and tools. In short, the mold is used to make the tool of the formed object, and the tool is composed of various parts, and different molds are composed of different parts.

[0003] The existing various electric appliances, equipment or vehicles, or machine equipment and control box in industrial application are provided with indicator lamps, and different information is conveyed through the on-off or color difference of the indicator lamp. In some special cases, a light shielding piece needs to be specially arranged around the lamp bead to prevent light leakage, especially for the indicator lamp with multiple lamp beads arranged side by side, and it is particularly important to arrange the light shielding piece. In the injection molding process of such light shielding piece, an integrated injection molding method is used for processing to facilitate installation, but this also brings processing problems. Since the inner cavity of the light shielding piece needs to be specially provided with an inner cavity forming column for forming, the friction between the inner cavity forming column and the light shielding piece is large, and if only the mechanical hand is used for clamping and discharging during demolding, the clamping force on the injection molded workpiece will be too large to cause deformation. Therefore, for such injection molded parts, it is necessary to design a new mold to meet the production and processing needs. CONTENT OF THE UTILITY MODEL

[0004] The utility model discloses a three point formula lampshade injection mold that can solve the above problems well.

[0005] To achieve the above requirements, the utility model adopts the technical scheme of:

[0006] A three point formula lampshade injection mold is provided, which comprises a movable mold core and a fixed mold core opposite to each other. An injection molding area is arranged on the upper surface of the fixed mold core. A plurality of inner cavity forming columns are arranged side by side on the injection molding area. A narrowing part is arranged on the upper end of the inner cavity forming column. First needle movable holes are arranged on the left and right sides of the inner cavity forming column on the injection molding area. First needles are arranged in the first needle movable holes. A second needle movable hole is arranged on the front side of the inner cavity forming column on the injection molding area. A needle sleeve is arranged in the second needle movable hole. A second needle is arranged in the needle sleeve. The top end of the inner cavity forming column is higher than the lower end of the narrowing part. A forming groove is arranged on the lower surface of the movable mold core corresponding to the injection molding area. When the mold is closed, the second needle and the top end face of the inner cavity forming column are in contact with the bottom face of the forming groove.

[0007] The three-point synchronous pushing type lampshade injection mold, wherein the first ejector pin and the first ejector pin movable hole are both rectangular in cross section and the length direction is the same as the arrangement direction of the plurality of inner cavity forming columns.

[0008] The three-point synchronous pushing type lampshade injection mold, wherein the ejector pin sleeve and the second ejector pin are both cylindrical, and when assembled in place, the upper end faces of the ejector pin sleeve and the first ejector pin are both flush with the injection molding area.

[0009] The three-point synchronous pushing type lampshade injection mold, wherein the side wall of the narrowed part is sequentially provided with an inclined surface and a vertical surface from bottom to top, and the upper end of the inclined surface is inclined toward the center of the narrowed part.

[0010] The three-point synchronous pushing type lampshade injection mold, wherein the upper surface of the fixed mold core is provided with a lower runner groove, the lower surface of the movable mold core is provided with a glue feeding runner for feeding glue to the lower runner groove, and the inner wall of the forming groove is provided with a communication runner in communication with the lower runner groove.

[0011] The three-point synchronous pushing type lampshade injection mold, wherein the lower runner groove is inclined, and the communication runner is in the shape of a circular truncated cone with a narrow upper part and a wide lower part.

[0012] The three-point synchronous pushing type lampshade injection mold, wherein the upper part of the outlet of the communication runner is provided with a flow guiding part for guiding the downward flow of the glue.

[0013] The three-point synchronous pushing type lampshade injection mold, wherein the lower runner groove is inclined, and the communication runner is in the shape of a circular truncated cone with a narrow upper part and a wide lower part. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme in 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 also be obtained without creative labor on the premise of not deviating from the concept of the present application:

[0015] Figure 1 is the state diagram when the mold is opened.

[0016] Figure 2 is Figure 1is a partial structure enlarged view of

[0017] Figure 3 is a bottom view of the fixed mold base of the utility model.

[0018] Figure 4 is Figure 3 is a partial structure enlarged view of DETAILED DESCRIPTION

[0019] The terms "first", "second", "third", and "fourth" and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the descriptive terms used in the specification and claims are intended to embrace by interpretation any and all embodiments having equivalent characteristics. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; the use of the singular is not intended to exclude the plural and vice versa unless specifically so stated. The term "include", and grammatical variants thereof, is intended to be non-limiting, such that recitation of items in the singular is not to the exclusion of the plural and vice versa unless specifically stated. It is to be understood that the terms "including", "comprising", "consisting" and "consisting essentially of" to the terms "comprising", "including" and "containing", or any other variation thereof, are not used in this specification in a restrictive sense and serve only to enable the claims to encompass unrecited alternatives, such as components. The contents of any referenced patent, patent application, or other publication are incorporated herein by reference in their entirety.

[0020] 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 various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive or alternative embodiments. It is expressly understood that any of the embodiments described herein can be incorporated into other embodiments. "Plural" means two or more. "And / or" means that the associated listed items are one or both are present. The character " / " is generally used to represent "or", unless otherwise indicated.

[0021] In order to make the purpose, technical scheme and advantages of the utility model embodiment more clear, the following will combine the technical scheme in the utility model embodiment to make clear and complete description, obviously, the described embodiment is partial embodiment of the utility model, not all embodiments. Based on the embodiment of the utility model, all other embodiments obtained by the person skilled in the art without paying creative labor belong to the protection scope of the utility model.

[0022] The three-point push type lampshade injection mold of the preferred embodiment of the utility model, such as Figures 1-4As shown, the mold comprises a movable mold core 10 and a fixed mold core 20 opposite to each other; the upper surface of the fixed mold core 20 is provided with an injection molding area 201, a plurality of inner cavity forming columns 30 are arranged side by side in front and back on the injection molding area 201, and the upper end of the inner cavity forming column 30 is provided with a narrowing part 31; the left and right sides of the inner cavity forming column 30 on the injection molding area 201 are both provided with a first ejector pin movable hole 202, and the first ejector pin movable hole 202 is provided with a first ejector pin 40; the front side of the inner cavity forming column 30 on the injection molding area 201 is provided with a second ejector pin movable hole 203, the second ejector pin movable hole 203 is provided with an ejector pin sleeve 50 matched therewith, the ejector pin sleeve 50 is provided with a second ejector pin 60 matched with the inner cavity thereof, and the top end of the inner cavity forming column 30 is higher than the lower end of the narrowing part 31; the lower surface of the movable mold core 10 is provided with a forming groove 101 corresponding to the injection molding area 201; when the mold is closed, the top end surface of the second ejector pin 60 and the inner cavity forming column 30 are both in contact with the bottom surface of the forming groove 101; when the mold is opened, the injection molding machine drives the first ejector pin 40, the second ejector pin 60 and the ejector pin sleeve 50 to move towards the movable mold core 10, thereby exerting a pushing force on the left and right sides and the front side of the injection molded workpiece 200 and synchronously ejecting the inner cavity forming column 30, thereby realizing smooth separation from the inner cavity forming column 30. The overall structure of the present scheme is simple, the demolding effect is good, and the situation that the injection molded workpiece is clamped and damaged due to excessive clamping force of the blanking manipulator is avoided.

[0023] In the present embodiment, the cross section of the first ejector pin 40 and the first ejector pin movable hole 202 is rectangular and the length direction is the same as the arrangement direction of the plurality of inner cavity forming columns 30, so as to increase the contact area of the first ejector pin 40 and the lower end of the injection molded workpiece.

[0024] In the present embodiment, the ejector pin sleeve 50 and the second ejector pin 60 are both cylindrical, and when assembled in place, the upper end surface of the ejector pin sleeve 50 and the first ejector pin 40 is flush with the injection molding area 201, so as to ensure the flatness of the lower end surface of the injection molded workpiece.

[0025] In the present embodiment, the side wall of the narrowing part 31 is sequentially provided with an inclined surface 310 and a vertical surface 311 from bottom to top, and the upper end of the inclined surface 310 is inclined towards the center of the narrowing part 31.

[0026] In this embodiment, a downstream runner groove 204 is provided in the front-rear direction on the upper surface of the stationary mold core 20, and an upstream runner groove 104 corresponding to the downstream runner groove 204 is provided on the lower surface of the movable mold core 10; the inner cavity forming column 30 is located on one side of the downstream runner groove 204, and a glue inlet runner 103 for supplying molten glue to the downstream runner groove 204 is provided on the lower surface of the movable mold core 10, and a connecting runner 1011 communicating with the downstream runner groove 204 is provided on the inner wall of the forming groove 101. Specifically, the connecting runner 1011 is communicated with the downstream runner groove 204 through the upstream runner groove 104; further, a plurality of inner cavity forming columns 30 arranged in the front-rear direction are provided on both the left and right sides of the downstream runner groove 204 to increase the injection efficiency and achieve multi-station processing in one mold.

[0027] In this embodiment, the downstream runner groove 204 is inclined, and the connecting runner 1011 is in the shape of a frustum of a cone with a narrow upper part and a wide lower part. Further, a guiding part 1012 for guiding the molten glue downward is provided on the upper side wall of the outlet of the connecting runner 1011, so that the molten glue enters the forming groove 101 at an angle facing downward, avoiding the appearance of air bubbles in the workpiece and reducing the diameter of the sprue connected to the injection molded part after the molten glue solidifies.

[0028] Further, this mold further includes a movable mold base 70 and a stationary mold base 80 for respectively fixing the movable mold core 10 and the stationary mold core 20. The movable mold core and the stationary mold core are respectively embedded on the opposite side walls of the movable mold base 70 and the stationary mold base 80; an injection molding glue inlet 71 communicated with the glue inlet runner 103 is provided on the upper surface of the movable mold base 70. By cooperating with an injection molding machine through the injection molding glue inlet 71 and the connecting runner 1011, it is ensured that the molten glue smoothly enters the interior of the injection molding cavity.

[0029] Among them, the first ejector pin and the ejector pin sleeve 50 both longitudinally penetrate through the stationary mold core and the stationary mold base 80. Below the stationary mold base 80, there is a movable seat 80 for driving the first ejector pin 40 and the second ejector pin 60 to move up and down. A guide post 90 penetrating through the movable seat 80 is vertically fixed at the lower end of the stationary mold base 80. A buffer spring 100 is provided between the movable seat 80 and the stationary mold base 80. The buffer spring 100 is sleeved on the guide post 90. The ejector pin sleeve 50, the second ejector pin 60, and the first ejector pin 40 are all fixed on the movable seat 80. Below the movable seat 80, there is a fixed seat 110. The fixed seat 110 is fixed to the lower end of the guide post 90. During the actual processing, the movable seat 80 is driven to move up and down by the driving mechanism of the injection molding machine, and then the ejector pin sleeve 50 can be pushed to move up and down. When demolding, the injection molded part can be ensured to smoothly separate from the plurality of inner cavity forming columns 30 through the ejector pin sleeve 50, the first ejector pin 40, and the second ejector pin 60.

[0030] In this embodiment, support seats 120 for supporting the stationary mold base 80 are provided on both opposite sides of the movable seat 80 on the fixed seat 110, so as to play the role of fixing the movable mold base 70 and the fixed seat 110 and providing a moving space for the up and down movement of the movable seat 80.

[0031] It should be understood that modifications or variations can be made according to the above description by those of ordinary skill in the art, and all such modifications and variations are intended to be within the scope of the present application as defined by the claims appended hereto.

Claims

1. A three-point simultaneous push type lampshade injection mold characterized by, The injection molding die comprises an upper and lower movable die core and a fixed die core; the upper surface of the fixed die core is provided with an injection molding area, a plurality of inner cavity forming columns are arranged side by side on the injection molding area, the upper end of the inner cavity forming column is provided with a narrowing part; the left and right sides of the inner cavity forming column on the injection molding area are provided with a first ejector pin movable hole, the first ejector pin movable hole is provided with a first ejector pin; the front side of the inner cavity forming column on the injection molding area is provided with a second ejector pin movable hole, the second ejector pin movable hole is provided with an ejector pin sleeve matched therewith, the ejector pin sleeve is provided with a second ejector pin matched with the inner cavity thereof, the top end of the inner cavity forming column is higher than the lower end of the narrowing part; the lower surface of the movable die core is provided with a forming groove corresponding to the injection molding area; when the mold is closed, the second ejector pin and the top end surface of the inner cavity forming column are both in contact with the bottom surface of the forming groove.

2. The three-point push-together lampshade injection mold of claim 1, wherein, The first ejector pin and the first ejector pin movable hole are both rectangular in cross section, and the length direction is the same as the arrangement direction of the plurality of inner cavity forming columns.

3. The three-point push-together lampshade injection mold of claim 2, wherein, The ejector pin sleeve and the second ejector pin are both cylindrical, and the upper end surface of the ejector pin sleeve and the first ejector pin are flush with the injection molding area when assembled.

4. The three-point push-together lampshade injection mold of claim 1, wherein, The side wall of the narrowing part is sequentially provided with an inclined surface and a vertical surface from bottom to top, and the upper end of the inclined surface is inclined towards the center of the narrowing part.

5. The three-point pusher-type lampshade injection mold according to any one of claims 1 to 4, characterized in that, The upper surface of the fixed die core is provided with a lower runner groove, the lower surface of the movable die core is provided with a glue inlet runner for supplying molten glue to the lower runner groove, and the inner wall of the forming groove is provided with a communication runner in communication with the lower runner groove.

6. The three-point push-together lampshade injection mold of claim 5, wherein, The lower runner groove is inclined, and the communication runner is in the shape of a circular truncated cone with a narrow upper part and a wide lower part.

7. The three-point push-together lampshade injection mold of claim 6, wherein, The upper part of the outlet of the communication runner is provided with a flow guide part for guiding the molten glue downward.

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