Projector shell injection mold

Abstract

The utility model relates to an injection mold for a projector shell, which is applied to the projector shell and comprises a base, an injection molding module and an ejection component. The injection molding module comprises an injection molding cavity and an injection molding channel, the injection molding channel communicates with the injection molding cavity, the injection molding module comprises an upper mold, a lower mold and an injection molding head, and the injection molding head is arranged in the injection molding cavity. The ejection assembly comprises a first ejection rod and a second ejection rod which are both connected with the injection molding head in a sliding mode, the first ejection rod and the second ejection rod are both connected with the base, the first ejection rod slides in the first direction, the second ejection rod slides in the second direction, and an inclined included angle is formed between the first direction and the second direction. Due to the fact that the first ejector rod is obliquely arranged, the second ejector rod is arranged in the vertical direction, inclined force is applied to the periphery of the injection molding product through the first ejector rod, the injection molding product can shake left and right to be loosened during demolding, accordingly, protection of inverted buckles of the injection molding product is facilitated, and the injection molding product can be smoothly disengaged through cooperation of the first ejector rod and the second ejector rod.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of injection molding, especially to a projector shell injection mold. BACKGROUND

[0002] With the rapid development of plastic industry and the continuous improvement of general and engineering plastics in strength and precision, the application range of plastic products is also expanding. Therefore, the application of injection mold is becoming more and more widely.

[0003] With the increasing demand for shape and function of injection products and the characteristics of diversification, the structure of injection mold also becomes more and more complex. The injection products of the current stage are usually designed with reverse buckle structure, and the injection mold generally ejects the injection product through the existing inclined top mechanism, so that the injection product is smoothly demolded.

[0004] However, when the head position of the inclined top mechanism has reverse buckle and cannot be demolded, the existing inclined top mechanism will still have problems such as easy sticking to the mold, difficult to take out the injection product, and even the injection product cannot be demolded. In addition, the reverse buckle is also easy to be damaged during demolding. SUMMARY

[0005] The utility model aims at providing a projector shell injection mold, which aims to solve the technical problems of easy sticking to the mold and easy damage to the reverse buckle of the existing injection mold during demolding.

[0006] In order to solve the above technical problems, a projector shell injection mold is provided, which is applied to the projector shell and includes:

[0007] A base;

[0008] An injection module, including an injection cavity and an injection channel, the injection channel is communicated with the injection cavity, the injection module includes an upper mold, a lower mold and an injection head, the injection head is arranged in the injection cavity;

[0009] An ejection assembly, including a first ejector rod and a second ejector rod which are both in sliding connection with the injection head, the first ejector rod and the second ejector rod are both connected with the base, the first ejector rod slides along a first direction, the second ejector rod slides along a second direction, and the first direction and the second direction have an inclined included angle.

[0010] Further, the first ejector rod is provided with a plurality of first ejector rods, and the inclined included angles of the plurality of first ejector rods include at least two different included angles.

[0011] Further, a reverse buckle is formed in the projector shell, and the extension length of the reverse buckle is positively correlated with the size of the inclined included angle.

[0012] Further, assuming that the extension length of the reverse buckle is L, the depth of the inner cavity of the projector shell is H, and the inclined angle is θ, the calculation formula of the inclined angle θ is:

[0013] Further, the second ejector pin is arranged at the center position of the injection head, and the plurality of first ejector pins are arranged close to the inner wall of the projector shell.

[0014] Further, the first ejector pin is rotationally connected with the base.

[0015] Further, the injection mold further comprises a rotating member, the rotating member is connected with the base, the rotating member is provided with a rotating groove, and the first ejector pin is formed with a rotating part matched with the rotating groove.

[0016] Further, the injection mold further comprises a guide block arranged on the first ejector pin, and the guide block is located between the injection head and the base.

[0017] Further, the injection mold further comprises a driving member for driving the base to move.

[0018] Further, during injection, the first ejector pin and the second ejector pin are configured as part of the injection head.

[0019] The embodiment of the present application has the following beneficial effects:

[0020] The injection mold for the projector shell in the embodiment has the following beneficial effects: the first ejector pin is arranged in an inclined manner, the second ejector pin is arranged in a vertical direction, the first ejector pin applies an inclined force to the periphery of the injection product, the injection product can shake left and right to loosen during demolding, thereby being beneficial to protecting the reverse buckle of the injection product from being damaged, and in addition, the first ejector pin cooperates with the second ejector pin to facilitate the smooth demolding of the injection product. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0022] Figure 1 The structure diagram of the injection mold according to the embodiment of the present application is shown in the figure;

[0023] Figure 2 The cross-sectional view of the injection mold according to the embodiment of the present application is shown in the figure;

[0024] Figure 3 A structure schematic view of the ejection assembly;

[0025] Figure 4 A sectional view of the ejection assembly;

[0026] Figure 5 A top view of the ejection assembly;

[0027] Figure 6 A sectional view of the ejection assembly and the base connection;

[0028] Figure 7 A bottom view of the projector shell.

[0029] Wherein: 100, the projector shell injection mold; 110, the base; 120, the injection mold module; 121, the upper die; 122, the lower die; 123, the injection head; 124, the injection cavity; 125, the injection channel; 130, the ejection assembly; 131, the first ejector rod; 1311, the rotating part; 132, the second ejector rod; 140, the rotating piece; 141, the rotating groove; 150, the guide block;

[0030] 200, the projector shell; 210, the reverse buckle; 220, the inner wall. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0034] Referring to Figures 1-7 The projection housing injection mold 100 provided by the embodiment of the application is applied to a projection housing 200, and the injection mold comprises a base 110, an injection module 120 and an ejection assembly 130. The injection module 120 comprises an injection cavity 124 and an injection channel 125, the injection channel 125 is in communication with the injection cavity 124, the injection module 120 comprises an upper mold 121, a lower mold 122 and an injection head 123, and the injection head 123 is arranged in the injection cavity 124. The ejection assembly 130 comprises a first ejector rod 131 and a second ejector rod 132 which are both in sliding connection with the injection head 123, the first ejector rod 131 and the second ejector rod 132 are both connected with the base 110, the first ejector rod 131 slides in a first direction, the second ejector rod 132 slides in a second direction, and the first direction and the second direction have an oblique included angle. It is exemplarily pointed out that the second ejector rod 132 moves in a vertical direction, that is, the first ejector rod 131 is arranged obliquely relative to the second ejector rod 132. The injection head 123 is one of the key components of the injection mold which directly contacts with the injection product, and the shape and size of the injection head 123 determine the contour of the injection product. In the injection process, the molten plastic material enters the injection cavity 124 through the injection channel 125, and forms the contour of the product under the constraint of the injection head 123. Therefore, the design of the injection head 123 must be matched with the design requirement of the product, so as to ensure that the product can reach the expected contour and size.

[0035] The projection housing injection mold 100 in the embodiment is provided with the first ejector rod 131 and the second ejector rod 132, the first ejector rod 131 is arranged obliquely, the second ejector rod 132 is arranged in a vertical direction, and the oblique force is applied to the periphery of the injection product by the first ejector rod 131, so that the injection product can shake left and right to produce loosening when demolding, thereby being beneficial to protecting the reverse buckle 210 of the injection product from being damaged, and in addition, the first ejector rod 131 cooperates with the second ejector rod 132 to be more beneficial to the smooth ejection of the injection product.

[0036] Referring to Figure 3 , Figure 4 and Figure 5 In a possible implementation, a plurality of first ejector rods 131 are arranged, and the oblique included angles of the plurality of first ejector rods 131 comprise at least two different included angles.

[0037] Referring to Figure 7In a possible implementation, the projection device housing 200 is formed with an undercut 210, and the extension length of the undercut 210 is positively correlated with the size of the inclined angle. For example, the extension length of the undercut 210 refers to the length extending from the inner wall 220 of the projection device housing 200 to the center of the projection device housing 200. It can be understood that the longer the extension length of the undercut 210, the larger the inclined angle of the first ejector pin 131, and vice versa. It should be noted that in the present embodiment, the first ejector pin 131 is arranged beside each undercut 210, that is, the position of the first ejector pin 131 corresponds to the position of the undercut 210, and the first ejector pin 131 with the corresponding inclined angle is arranged according to the extension length of the undercut 210, so that each undercut 210 can be accurately matched. The undercut 210 structure is prone to cause mold sticking problems in injection molding products, because the undercut 210 part will generate a large friction force and resistance with the mold during demolding. By setting the inclined angle matching the extension length of the undercut 210, the first ejector pin 131 can more effectively exert a force in the inclined direction during demolding, so that the injection molding product shakes left and right during the demolding process, thereby reducing the adhesion between the injection molding product and the mold and reducing the risk of mold sticking. The longer the extension length of the undercut 210, the larger the contact area with the mold, and the more difficult the demolding. By setting the inclined angle corresponding to the extension length of the undercut 210, the first ejector pin 131 can exert a larger inclined force on the undercut 210 during demolding, helping the undercut 210 to smoothly separate from the mold and avoiding deformation or damage of the undercut 210 due to difficult demolding. If the inclined angle of the first ejector pin 131 is not reasonably set during the demolding process, the undercut 210 may be damaged. By accurately setting the inclined angle according to the extension length of the undercut 210, the force exerted by the first ejector pin 131 during demolding can be more uniform and reasonable, avoiding excessive local stress on the undercut 210, thereby effectively protecting the undercut 210 from damage and improving the integrity and quality of the injection molding product.

[0038] Please refer to Figure 4 and Figure 7 In a possible implementation, the extension length of the undercut 210 is L, the depth of the inner cavity of the projection device housing 200 is H, and the inclined angle is θ. The calculation formula of the inclined angle θ is: Exemplarily, in the present embodiment, the inclination angle θ includes 2°, or 3°, or 4°, that is, at least one first ejector pin 131 has an inclination angle θ of 2°, at least one first ejector pin 131 has an inclination angle θ of 3°, and at least one first ejector pin 131 has an inclination angle θ of 4°. Of course, in specific applications, the value of the inclination angle θ can be specifically set according to the extension length of the undercut 210 of the injection molded product, for example, as an alternative, the inclination angle θ can also be 1°, or 5°, or 6°.

[0039] Please refer to Figure 3 , Figure 4 and Figure 5 In a possible implementation, the second ejector pin 132 is arranged at the center of the injection head 123, and the plurality of first ejector pins 131 are arranged close to the inner wall 220 of the projector shell 200. Exemplarily, arranging the plurality of first ejector pins 131 near the inner wall 220 of the injection molded product can make the ejection force applied during demolding more evenly distributed on the inner surface of the injection molded product. Such uniform force distribution helps to reduce local stress concentration and avoid demolding difficulties or product deformation caused by uneven ejection force. The inner wall 220 is a part of the injection molded product that has a larger contact area with the mold and is prone to generate a larger mold sticking force. Arranging ejector pins at these parts can more effectively apply ejection force to overcome the mold sticking force, making the injection molded product easier to separate from the mold. If there is an undercut 210 structure near the inner wall 220 of the projector shell 200, the ejector pins arranged near the inner wall 220 can better cooperate with the demolding of the undercut 210 and reduce damage to the undercut 210. This is because the ejector pins can more directly act on the undercut 210, providing more appropriate demolding force. For a projector shell 200 with complex shape and uneven wall thickness, the ejector pins arranged near the inner wall 220 can better adapt to the demolding needs of different parts. For example, in areas where the inner wall 220 is thicker or has a more complex shape, the first ejector pins 131 can provide stronger ejection force to ensure smooth demolding of these parts.

[0040] Please refer to Figure 6 In a possible implementation, the first ejector pin 131 is rotationally connected to the base 110. Exemplarily, rotational connection is conducive to improving the flexibility and adaptability of demolding. The rotational connection allows the first ejector pin 131 to flexibly adjust the angle and position during demolding to adapt to injection molded products of different shapes and structures. This flexibility allows the first ejector pin 131 to better cooperate with the geometric features of the product during demolding, reducing demolding difficulties caused by fixed positions of the ejector pins. The obliquely arranged ejector pins can apply force in an oblique direction during demolding. The direction of this force has a certain angle with the demolding direction of the product. This oblique force can cause the product to rotate or swing during demolding, making it easier to separate from the mold and improving demolding efficiency.

[0041] Please refer to Figure 6 In a possible implementation, the injection mold further comprises a rotating member 140 connected with the base 110, and the rotating member 140 is provided with a rotating groove 141, and the first ejector rod 131 is formed with a rotating part 1311 matched with the rotating groove 141. Exemplarily, the rotating part 1311 is rotatably installed in the rotating groove 141.

[0042] Please refer to Figure 3 , Figure 4 and Figure 5 In a possible implementation, the injection mold further comprises a guide block 150 arranged on the first ejector rod 131, and the guide block 150 is located between the injection head 123 and the base 110. Exemplarily, the guide block 150 is fixedly installed on the lower mold 122, and the first ejector rod 131 is slidingly installed on the guide block 150, one guide block 150 is arranged on one first ejector rod 131, and in addition, the lower mold 122 is correspondingly provided with a through slot for the first ejector rod 131 to pass through. The arrangement of the guide block 150 is beneficial to ensure the accuracy of the sliding of the first ejector rod 131. The guide block 150 can provide stable guiding action for the first ejector rod 131, so that it always maintains linear motion in the sliding process. This is crucial to ensure that the ejector rod can accurately exert the ejecting force when demolding, and avoid incomplete demolding or product damage caused by the deviation of the ejector rod. The arrangement of the guide block 150 can effectively reduce such motion error, and improve the accuracy and consistency of the motion of the first ejector rod 131.

[0043] In a possible implementation, the injection mold further comprises a driving member (not shown in the figure), which is used to drive the base 110 to move. Exemplarily, during demolding, the driving member drives the base 110 to rise, and at the same time, the base 110 drives the first ejector rod 131 and the second ejector rod 132 to rise simultaneously.

[0044] Please refer to Figure 6 , Figure 3 and Figure 5 Figure 6In a possible implementation, the first ejector rod 131 and the second ejector rod 132 are configured as part of the injection head 123 during injection molding. For example, the first ejector rod 131 is slidingly installed on the outer side of the injection head 123, and during injection molding, the first ejector rod 131 is partially embedded in the injection head 123 to become part of the injection head 123, thereby providing an outline for the shape of the injection molded product. When demolding is required, the driving member drives the first ejector rod 131 and the second ejector rod 132 to rise, at which time the first ejector rod 131 and the second ejector rod 132 protrude from the outer surface of the injection head 123 and lift the injection molded product to separate it from the injection head 123. During injection molding, the ejector rod is part of the injection head 123, so there is no need for additional steps to adjust the position or state of the ejector rod, simplifying the injection molding process. After injection molding is completed, the ejector rod can directly participate in the demolding process, reducing intermediate links and improving production efficiency. During injection molding, the first ejector rod 131 and the second ejector rod 132 are embedded in the injection head 123 to become part of the injection head 123, which ensures that the outline of the injection molded product is formed by the injection head 123 and the ejector rod. This design makes the surface of the injection molded product smoother and more even, reducing product surface defects such as depressions and burrs caused by gaps between the ejector rod and the injection head 123, thereby improving the appearance quality and dimensional accuracy of the product.

[0045] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A projector housing injection mold applied to a projector housing, characterized in that, The injection molding device comprises a base, an injection molding module, and an ejection assembly. The injection molding module comprises an injection cavity, an injection channel, an upper mold, a lower mold, and an injection head. The ejection assembly comprises a first ejection rod and a second ejection rod, both of which are in sliding connection with the injection head. The first ejection rod is in connection with the base and slides in a first direction.

2. The projector housing injection mold of claim 1, wherein, The second ejection rod is in connection with the base and slides in a second direction.

3. The projector housing injection mold of claim 2, wherein, The first ejection rod is provided with a plurality of ejection rods, and the plurality of ejection rods have at least two different angles.

4. The projector housing injection mold of claim 3, wherein the first mold half is configured to define a first mold cavity and the second mold half is configured to define a second mold cavity. The extension length of the reverse buckle is L, the depth of the inner cavity of the projector shell is H, and the inclined angle is θ, and the calculation formula of the inclined angle θ is:

5. The projector housing injection mold of claim 2, wherein, The projection housing is provided with an undercut, and the extension length of the undercut is positively correlated with the size of the angle.

6. The projector housing injection mold of claim 1, wherein, The second ejection rod is arranged at the center of the injection head, and the plurality of first ejection rods are arranged close to the inner wall of the projection housing.

7. The projector housing injection mold of claim 6, wherein, The first ejection rod is in rotational connection with the base.

8. The projector housing injection mold of claim 1, wherein, The injection molding device further comprises a rotating member in connection with the base.

9. The projector housing injection mold of claim 1, wherein, The rotating member is provided with a rotating groove, and the first ejection rod is provided with a rotating part in cooperation with the rotating groove.

10. The projector housing injection mold of claim 1, wherein, The injection molding device further comprises a guide block arranged on the first ejection rod and located between the injection head and the base. The injection molding device further comprises a driving member for driving the base to move. During injection molding, the first ejection rod and the second ejection rod are configured as part of the injection head.

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