Injection mold for dustproof net cover on projector

Abstract

The dustproof net cover injection mold on the projector comprises a fixed mold and a movable mold, the fixed mold sequentially comprises a fixed mold bottom plate, a water gap plate and a fixed mold plate from left to right, a fixed mold core is embedded in the fixed mold plate, a glue injection nozzle is arranged on the fixed mold bottom plate, a first glue inlet is formed in the water gap plate and communicated with the glue injection nozzle, and a second glue inlet is formed in the movable mold plate and communicated with the fixed mold core. A main pouring gate and three secondary pouring gates are formed in the left side of the fixed mold plate; the fixed mold core comprises a public fixed mold core and an interchangeable fixed mold core; the movable mold comprises a movable mold bottom plate, an ejector pin assembly and a movable mold plate in sequence from right to left, a movable mold core is embedded in the movable mold plate, a second concave cavity is formed in the movable mold plate and used for installing the movable mold core, and the movable mold core comprises a public movable mold core, a first interchangeable movable mold core, a second interchangeable movable mold core, a third interchangeable movable mold core and a fourth interchangeable movable mold core. According to the dustproof net cover injection mold on the projector, a three-point feeding mode is adopted, compared with a single-point pouring gate feeding mode, the forming efficiency is improved, glue injection can be more uniform, and the appearance of a formed product is smoother.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a dustproof net cover on a projector. Background Art

[0002] An injection mold is a tool for producing plastic products, and is also a tool for giving plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by an injection molding machine, and after cooling and solidification, a molded product is obtained. The existing injection mold for the dust cover on the projector will not fill the plastic sufficiently when it is injected into the mold cavity during injection molding production, resulting in an uneven appearance of the product out of the mold and a high rate of product defects. In addition, the mold core currently used to produce this product adopts an integrated structure, that is, a set of molds can only be used to produce one model of product. If there are multiple models of products with similar features, opening molds one by one will increase development costs, extend the development cycle, and have high maintenance costs. Utility Model Content

[0003] The utility model aims to provide an injection mold for a dustproof net cover on a projector to solve the technical problems in the background technology.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions:

[0005] A dust screen cover injection mold for a projector, comprising a fixed mold and a movable mold, wherein the fixed mold comprises a fixed mold bottom plate, a nozzle plate and a fixed mold plate from left to right, a fixed mold core is embedded in the fixed mold plate, a glue injection nozzle is arranged on the fixed mold bottom plate, a first glue inlet is arranged on the nozzle plate and communicated with the glue injection nozzle, a main gate and three secondary gates are arranged on the left side of the fixed mold plate, the three secondary gates are distributed in three directions along the circumferential direction of the main gate and are communicated with the main gate through a branch channel, the secondary gate runs through the fixed mold plate, and glue inlets are correspondingly arranged on the fixed mold core and communicated with the secondary gates respectively, the main gate is communicated with the first glue inlet, and a first The concave cavity is used to install the fixed mold core, and the fixed mold core includes a common fixed mold core and an interchangeable fixed mold core; the movable mold is composed of a movable mold bottom plate, an ejector pin assembly and a movable mold plate from right to left, and a movable mold core is embedded in the movable mold plate. A second concave cavity is provided in the movable mold plate for installing the movable mold core, and the movable mold core includes a common movable mold core, a first interchangeable movable mold core, a second interchangeable movable mold core, a third interchangeable movable mold core and a fourth interchangeable movable mold core. The first interchangeable movable mold core, the second interchangeable movable mold core, the third interchangeable movable mold core and the fourth interchangeable movable mold core are distributed side by side in the common movable mold core, and a plurality of resin shutters are fixed on the movable mold plate to slide with the fixed mold plate.

[0006] The upper and lower sides of the movable mold core are symmetrically installed with first sliders, and the front side of the movable mold core is provided with two groups of second sliders. The first slider and the second slider are both slidably installed on the movable mold plate, and the fixed mold plate is installed with a first inclined guide column assembly and a second inclined guide column assembly to cooperate with the first slider and the second slider.

[0007] The first oblique guide column assembly and the second oblique guide column assembly have the same structure, the first oblique guide column assembly includes a first oblique guide column and a first mounting block, the first mounting block is fixedly connected to the first fixed template, the first mounting block is provided with a first oblique guide hole, the first oblique guide column passes through the first oblique guide hole, the first slider includes a first base and a first side mold core installed on the first base, the movable template is provided with a slide groove, the first base slides in the slide groove, the first base is provided with a second oblique guide hole, the first oblique guide column slides in the second oblique guide hole, the slide groove is provided with a limit piece, and the limit piece is installed above the first base to limit the first base from detaching outward.

[0008] The limiting member is a screw, and the limiting member is threadedly fixed to the movable template.

[0009] The first mounting block is provided with a first inclined guide surface, and the first base is provided with a second inclined guide surface that cooperates with and contacts the first inclined guide surface.

[0010] A plurality of guide sleeves are installed on the fixed platen, and guide posts and guide sleeves are correspondingly provided on the movable platen for sliding connection.

[0011] Compared with the prior art, the utility model provides an injection mold for a dustproof screen cover on a projector, which adopts a three-point feeding method, which improves the molding efficiency and makes the glue injection more uniform than the single-point gate feeding method. The molded surface of the product is smoother, which ensures the quality of the injection molded parts and improves the work efficiency. The structure of the present application splits the structure of the movable mold core and the fixed mold core, and designs the parts with the same structure of multiple models of products into a common movable mold core and a common fixed mold core of a universal structure, and the parts with different structures are designed into replaceable interchangeable movable mold cores and interchangeable fixed mold cores, which greatly reduces the mold opening time, mold opening cost and mold maintenance costs in the later production, and plays a role in energy saving and cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 : Schematic diagram of the fixed mold three-dimensional structure in this application;

[0013] Figure 2 : A schematic diagram of a half-section structure in this application;

[0014] Figure 3 : The main view of the template in this application;

[0015] Figure 4 : Schematic diagram of the decomposition of the fixed mold core in this application;

[0016] Figure 5 : Schematic diagram of the three-dimensional structure of the movable mold in this application;

[0017] Figure 6 : Schematic diagram of the disassembly of the movable mold core in this application;

[0018] Figure 7 : A three-dimensional structural diagram of the first slider in this application. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] Specific embodiment 1: Please refer to Figures 1 to 7In an embodiment of the utility model, a dustproof screen cover injection mold for a projector includes a fixed mold and a movable mold. The fixed mold is composed of a fixed mold bottom plate 1, a nozzle plate 2 and a fixed mold plate 3 from left to right. A fixed mold core 5 is embedded in the fixed mold plate 3. A glue injection nozzle 4 is provided on the fixed mold bottom plate 1. A first glue inlet 201 is provided on the nozzle plate 2 and communicates with the glue injection nozzle 4. A main gate 301 and three secondary gates 302 are provided on the left side of the fixed mold plate 3. The three secondary gates 302 are distributed in three directions along the circumferential direction of the main gate 301 and are communicated with the main gate 301 through a branch channel 303. The secondary gate 302 runs through the fixed mold. The fixed mold core 5 is provided with corresponding glue inlets which are respectively communicated with the secondary gate 302, the main gate 301 is communicated with the first glue inlet 201, the fixed mold plate 3 is provided with a first concave cavity for installing the fixed mold core 5, the fixed mold core 5 includes a common fixed mold core 501 and an interchangeable fixed mold core 502, and the interchangeable fixed mold core 502 is fixed to the common fixed mold core 501 by screws; the movable mold is composed of a movable mold bottom plate 8, an ejector assembly 9 and a movable mold plate 10 from right to left, a movable mold core 11 is embedded in the movable mold plate 10, and a second concave cavity is provided in the movable mold plate 10 for installing the movable mold core 11, and the movable mold core 11 includes a common fixed mold core 501 and an interchangeable fixed mold core 502. The interchangeable fixed mold core 502 is fixed to the common fixed mold core 501 by screws; the movable mold is composed of a movable mold bottom plate 8, an ejector assembly 9 and a movable mold plate 10 from right to left, a movable mold core 11 is embedded in the movable mold plate 10, and a second concave cavity is provided in the movable mold plate 10 for installing the movable mold core 11, and the movable mold core 11 includes a common The common movable mold core 1101, the first interchangeable movable mold core 1102, the second interchangeable movable mold core 1103, the third interchangeable movable mold core 1104 and the fourth interchangeable movable mold core 1105 are arranged side by side and spaced apart in the common movable mold core 1101, and the first interchangeable movable mold core 1102, the second interchangeable movable mold core 1103, the third interchangeable movable mold core 1104 and the fourth interchangeable movable mold core 1105 are all embedded and fixed in the common movable mold core 1101, according to the production model To replace the interchangeable fixed mold core 502 and the interchangeable movable mold core, the mold opening cost and production time of the mold are reduced. Several resin openers and shutters are fixed on the movable mold plate 10 and slidably cooperate with the fixed mold plate 3. The movable mold core 11 also includes a fifth interchangeable movable mold core 1106 and a sixth interchangeable movable mold core 1107. The fifth interchangeable movable mold core 1106 and the sixth interchangeable movable mold core 1107 both include a glue inlet. The fifth interchangeable movable mold core 1106 is on one side of the first interchangeable movable mold core 1102, and the sixth interchangeable movable mold core 1107 is between the third interchangeable movable mold core 1104 and the fourth interchangeable movable mold core 1105.

[0021] The first slide blocks 12 are symmetrically installed on the upper and lower sides of the movable mold core 11, and two groups of second slide blocks 13 are provided on the front side of the movable mold core 11. The upper and lower positions of the two groups of second slide blocks 13 are installed on the fixed first slide block 12 and the second slide block 13 are both slidably installed on the movable mold plate 10, and the first inclined guide column assembly 6 and the second inclined guide column assembly 7 are installed on the fixed mold plate 3 to cooperate with the first slide block 12 and the second slide block 13.

[0022] The first oblique guide column assembly 6 and the second oblique guide column assembly 7 have the same structure. The first oblique guide column assembly 6 includes a first oblique guide column 602 and a first mounting block 601. The first mounting block 601 is fixedly connected to the first fixed template 3. The first mounting block 601 is provided with a first oblique guide hole. The first oblique guide column 602 passes through the first oblique guide hole. The first slider 12 includes a first base 1201 and a first side mold core 1202 installed on the first base 1201. A sliding groove is provided on the movable template 10. The first base 1201 slides in the sliding groove. The first base 1201 is provided with a second oblique guide hole. The first oblique guide column 602 slides in the second oblique guide hole. A limit member 14 is provided on the sliding groove. The limit member 14 is installed above the first base 1201 to limit the first base 1201 from detaching outward. The limit member 14 in the present application is a screw, and the limit member 14 is threadedly fixed to the movable template 10. The second slider includes a second base and a second side mold core. The cooperation between the second slider 13 and the second oblique guide column assembly 7 is the same as the cooperation between the first slider 12 and the first oblique guide column assembly 6, and will not be repeated.

[0023] A compression spring 1203 is provided between the first base 1201 and the movable mold core 11. When the mold is opened, when the first inclined guide column 602 is separated from the first base 1201, the first base 1201 drives the first side mold core 1202 to slide outward due to the reaction force of the compression spring 1203, and the first side mold core 1202 is demolded from the product.

[0024] The first mounting block 601 is provided with a first inclined guide surface 601-1, and the first base 1201 is provided with a second inclined guide surface 1201-1 which cooperates with and contacts the first inclined guide surface 601-1. The first inclined guide surface 601-1 and the second inclined guide surface 1201-1 can enable the slider and the inclined guide column assembly to have a force to slide the slider toward the movable mold core 11 when the mold is closed, thereby ensuring that all sliders can accurately slide into the set position.

[0025] A plurality of guide sleeves 15 are installed on the fixed die plate 3 , and a guide column 16 is correspondingly provided on the movable die plate 10 and is slidably connected to the guide sleeves 15 .

[0026] Compared with the prior art, the utility model provides an injection mold for a dustproof screen cover on a projector, which adopts a three-point feeding method, which improves the molding efficiency and makes the glue injection more uniform than the single-point gate feeding method. The molded surface of the product is smoother, which ensures the quality of the injection molded parts and improves the work efficiency. The structure of the present application splits the structure of the movable mold core and the fixed mold core, and designs the parts with the same structure of multiple models of products into a common movable mold core and a common fixed mold core of a universal structure, and the parts with different structures are designed into replaceable interchangeable movable mold cores and interchangeable fixed mold cores, which greatly reduces the mold opening time, mold opening cost and mold maintenance costs in the later production, and plays a role in energy saving and cost reduction.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the foregoing exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An injection mold for a dust screen cover on a projector, characterized in that: It includes a fixed mold and a movable mold, and the fixed mold is composed of a fixed mold bottom plate, a nozzle plate and a fixed mold plate from left to right. A fixed mold core is embedded in the fixed mold plate, a glue injection nozzle is provided on the fixed mold bottom plate, a first glue inlet is provided on the nozzle plate and is communicated with the glue injection nozzle, a main gate and three secondary gates are provided on the left side of the fixed mold plate, the three secondary gates are distributed in three directions along the circumferential direction of the main gate and are communicated with the main gate through a branch channel, the secondary gate runs through the fixed mold plate, and glue inlets are correspondingly provided on the fixed mold core and are communicated with the secondary gates respectively, the main gate is communicated with the first glue inlet, and a first concave cavity is provided in the fixed mold plate for installing the fixed mold The mold core, the fixed mold core includes a common fixed mold core and an interchangeable fixed mold core; the movable mold is composed of a movable mold bottom plate, an ejector pin assembly and a movable mold plate from right to left, a movable mold core is embedded in the movable mold plate, a second concave cavity is provided in the movable mold plate for installing the movable mold core, the movable mold core includes a common movable mold core, a first interchangeable movable mold core, a second interchangeable movable mold core, a third interchangeable movable mold core and a fourth interchangeable movable mold core, the first interchangeable movable mold core, the second interchangeable movable mold core, the third interchangeable movable mold core and the fourth interchangeable movable mold core are distributed side by side in the common movable mold core, and a plurality of resin shutters are fixed on the movable mold plate to slide with the fixed mold plate.

2. The dustproof screen cover injection mold for a projector according to claim 1, characterized in that: The upper and lower sides of the movable mold core are symmetrically installed with first sliders, and the front side of the movable mold core is provided with two groups of second sliders. The first slider and the second slider are both slidably installed on the movable mold plate, and the fixed mold plate is installed with a first inclined guide column assembly and a second inclined guide column assembly to cooperate with the first slider and the second slider.

3. The dust screen cover injection mold for a projector according to claim 2, characterized in that: The first oblique guide column assembly and the second oblique guide column assembly have the same structure, the first oblique guide column assembly includes a first oblique guide column and a first mounting block, the first mounting block is fixedly connected to the first fixed template, the first mounting block is provided with a first oblique guide hole, the first oblique guide column passes through the first oblique guide hole, the first slider includes a first base and a first side mold core installed on the first base, the movable template is provided with a slide groove, the first base slides in the slide groove, the first base is provided with a second oblique guide hole, the first oblique guide column slides in the second oblique guide hole, the slide groove is provided with a limit piece, and the limit piece is installed above the first base to limit the first base from detaching outward.

4. The dust screen cover injection mold for a projector according to claim 3, characterized in that: The limiting member is a screw, and the limiting member is threadedly fixed to the movable template.

5. The dust screen cover injection mold for a projector according to claim 4, characterized in that: The first mounting block is provided with a first inclined guide surface, and the first base is provided with a second inclined guide surface that cooperates with and contacts the first inclined guide surface.

6. The dust screen cover injection mold for a projector according to claim 5, characterized in that: A plurality of guide sleeves are installed on the fixed platen, and guide posts and guide sleeves are correspondingly provided on the movable platen for sliding connection.

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