Injection mold for shell of automobile discharge gun

Abstract

The utility model belongs to the technical field of molds, and particularly relates to an injection mold for an automobile discharge gun shell. The injection mold for the automobile discharge gun shell comprises a hot runner template and a front mold which are connected in sequence, a valve needle hot runner is arranged in the hot runner template, and a discharging sprue of the valve needle hot runner extends into the front mold; a front mold core is arranged in the front mold, a product cavity is formed in the front mold core, and the discharging sprue is connected with the product cavity. According to the injection mold for the discharge gun shell of the automobile, the valve needle hot runner is directly connected with the product cavity, so that on one hand, waste stub bars are not generated, and the raw material consumption is saved; and on the other hand, after the valve needle hot runner injects plastic into the product cavity, the valve needle can be closed immediately, plastic backflow in the mold cavity can be prevented (the interior of the product cavity is in a high-pressure state), therefore, the product is filled more fully, the problems of product shrinkage, weld lines and the like are reduced, and the appearance of the product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds, and in particular relates to an injection mold for a housing of an automobile discharge gun. Background Art

[0002] With the popularity of quick payment, in order to better occupy the market share, discharge guns tend to have a more beautiful and flawless appearance. Under the same product size, the difficulty of developing the size, weight and appearance mold of the injection molded product is increasing rapidly.

[0003] The current discharge gun housing mold utilizes a conventional injection molding mechanism and a fine internal water channel structure. This conventional injection molding mechanism results in excessive injection pressure, prolonged cooling time, and cumbersome runner removal, which increases costs. Waste in the runner slugs results in low raw material utilization, increasing production costs. Furthermore, the weld lines on the product's exterior cannot be completely corrected, impacting product aesthetics. The fine water channel, due to its low flow rate, lacks effective heat transfer, leading to uneven heating across the mold cavity and increased production costs. Furthermore, the weld lines on the product's exterior cannot be completely corrected, impacting product appearance. Utility Model Content

[0004] The utility model aims to provide an injection mold for an automobile discharge gun shell, so as to solve the technical problem in the prior art that a lot of runner head waste is produced after injection molding of the discharge gun shell mold, resulting in low raw material utilization.

[0005] In order to solve the above technical problems, the utility model provides an injection mold for an automobile discharge gun housing, comprising: a hot runner template and a front mold connected in sequence;

[0006] A valve needle hot runner is provided in the hot runner template; a discharge nozzle of the valve needle hot runner extends into the front mold;

[0007] A front mold core is provided in the front mold; a product cavity is provided in the front mold core; and the discharge nozzle is connected to the product cavity.

[0008] In one embodiment of the present application, the valve needle hot runner is a single-point valve needle hot runner.

[0009] In one embodiment of the present application, a water channel system is provided in the front mold core and is arranged around the product cavity.

[0010] In one embodiment of the present application, the diameter of the water pipe of the water system is 12 mm.

[0011] In one embodiment of the present application, the water system includes multiple layers of water pipes spaced apart along the axial direction of the product cavity.

[0012] In one embodiment of the present application, the injection mold for the automobile discharge gun housing further includes a middle mold and a rear mold;

[0013] A middle mold core is provided in the middle mold;

[0014] A cavity cover for sealing the opening of the product cavity is provided in the middle mold core.

[0015] In one embodiment of the present application, the feed nozzle of the valve needle hot runner is exposed on the hot runner template for receiving material.

[0016] The present invention has the beneficial effect of comprising a hot runner template and a front mold connected in sequence; a valve needle hot runner is disposed within the hot runner template, a discharge nozzle of the valve needle hot runner extends into the front mold; a front mold core is disposed within the front mold core, a product cavity is disposed within the front mold core, and the discharge nozzle is connected to the product cavity. The present invention utilizes a valve needle hot runner directly connected to the product cavity, which, on the one hand, eliminates waste material and saves on raw material; on the other hand, the valve needle can be immediately closed after the valve needle hot runner injects plastic into the product cavity, preventing plastic backflow within the mold cavity (the product cavity is under high pressure), thereby ensuring fuller product filling, reducing product shrinkage, weld lines, and other problems, and improving product appearance.

[0017] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a three-dimensional diagram of the injection mold for the automobile discharge gun housing of the utility model;

[0021] Figure 2 It is a cross-sectional view of the front mold of the utility model;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is a schematic diagram of the injection mold for the automobile discharge gun housing of the present invention, with the front mold and the front mold core hidden;

[0024] Figure 5 It is a cross-sectional view of the middle mold of the present utility model.

[0025] In the picture:

[0026] Hot runner template 1, front mold 2, front mold core 21, product cavity 22, valve needle hot runner 3, feed nozzle 31, discharge nozzle 32, water system 4, water pipe 41, middle mold 5, middle mold core 51, cavity cover 52, back mold 6, injection molding machine nozzle 100. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0028] See also Figures 1 to 4 In one embodiment of the present application, the injection mold for the automobile discharge gun housing includes a hot runner template 1 and a front mold 2 connected in sequence; a valve needle hot runner 3 is provided in the hot runner template 1; a discharge nozzle 32 of the valve needle hot runner 3 extends into the front mold 2; a front mold core 21 is provided in the front mold 2; a product cavity 22 is provided in the front mold core 21; and the discharge nozzle 32 is connected to the product cavity 22.

[0029] In this embodiment, the valve needle hot runner 3 is directly connected to the product cavity 22. On the one hand, no waste material heads are generated, saving the amount of raw materials; on the other hand, the valve needle of the valve needle hot runner 3 can be closed immediately after the plastic is injected into the product cavity 22, which can prevent the plastic in the mold cavity from flowing back (the product cavity 22 is in a high-pressure state), thereby making the product filling more full, reducing product shrinkage, weld lines and other problems, and improving the product appearance.

[0030] In this embodiment, the valve needle hot runner 3 may be a single-point valve needle hot runner, which has only one glue feeding point between it and the product cavity 22 .

[0031] It should be noted that the valve needle hot runner 3 can be realized by using the valve needle hot runner of the existing technology; the valve needle hot runner 3 can be temperature-controlled by an external hot runner temperature control box or other device, which can also be achieved by using the existing technology.

[0032] In this embodiment, optionally, the feed nozzle 31 of the valve needle hot runner 3 is exposed outside the hot runner template 1 for receiving material.

[0033] In one application scenario, the injection molding feeding process is as follows: high-temperature plastic melt is injected into the mold at high speed and high pressure through the injection molding machine nozzle 100, and the plastic melt enters the valve needle hot runner 3 through the feed nozzle 31; the hot runner external heat source temperature is controlled by the hot runner temperature control box, allowing the hot runner to achieve different temperatures; the melt enters the product cavity 22 from the discharge nozzle 32, and the product molding begins.

[0034] See also Figure 4 Preferably, the front mold core 21 is provided with a water system 4 arranged around the product cavity 22, which can be used to cool and shape the product.

[0035] Preferably, the diameter of the water pipe of the water system 4 is 12 mm.

[0036] Preferably, the water system 4 includes multiple layers of water pipes 41 spaced apart along the axial direction of the product cavity 22 .

[0037] Compared with the prior art, the water pipes of the water system 4 of the present invention have larger diameters, which improves the heat transfer effect, so that the product cavity 22 is heated evenly, and the joint line of the product appearance surface is improved without affecting the product appearance.

[0038] For further information, see Figure 1 and Figure 5 The injection mold for the automobile discharge gun housing further includes a middle mold 5 and a rear mold 6; a middle mold core 51 is provided in the middle mold 5; a cavity cover 52 for sealing the opening of the product cavity 22 is provided in the middle mold core 51.

[0039] It should be noted that the mold closing and demoulding mechanisms of the injection mold for the automobile discharge gun housing of the present invention can be implemented using existing structures, and this application does not improve the above-mentioned mechanisms.

[0040] In summary, the improved closed hot runner point-feeding of the automobile discharge gun housing injection mold of the utility model can achieve temperature adjustment through the hot runner temperature control box, thereby solving the problem of the appearance joint line of the injection molded product; by adjusting the hot runner and the mold feeding method, the function of making the runner smaller and lighter is achieved; the structure solves the problems of heavy runner and product appearance, improves raw material utilization, reduces production costs and improves the yield rate.

[0041] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0042] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0043] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. An injection mold for an automobile discharge gun housing, characterized in that: include: A hot runner template (1) and a front mold (2) connected in sequence; A valve needle hot runner (3) is provided in the hot runner template (1); a discharge nozzle (32) of the valve needle hot runner (3) extends into the front mold (2); A front mold core (21) is provided in the front mold (2); a product cavity (22) is provided in the front mold core (21); and the discharge nozzle (32) is connected to the product cavity (22).

2. The injection mold for the automobile discharge gun housing according to claim 1, characterized in that: The valve needle hot runner (3) is a single-point valve needle hot runner.

3. The injection mold for the automobile discharge gun housing according to claim 1, characterized in that: A water channel system (4) is provided in the front mold core (21) and is arranged around the product cavity (22).

4. The injection mold for the automobile discharge gun housing according to claim 3, characterized in that: The diameter of the water pipe of the water system (4) is 12 mm.

5. The injection mold for the automobile discharge gun housing according to claim 3, characterized in that: The water system (4) comprises multi-layer water pipes (41) spaced apart along the axial direction of the product cavity (22).

6. The injection mold for the automobile discharge gun housing according to claim 1, characterized in that: The automobile discharge gun housing injection mold further comprises a middle mold (5) and a rear mold (6); A middle mold core (51) is provided in the middle mold (5); A cavity cover (52) for sealing the opening of the product cavity (22) is provided in the middle mold core (51).

7. The injection mold for the automobile discharge gun housing according to claim 1, characterized in that: The feed nozzle (31) of the valve needle hot runner (3) is exposed on the hot runner template (1) and is used to receive material.

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