Injection mold

Abstract

The utility model is applicable to the field of injection molds, and provides an injection mold which comprises a fixed mold, a movable mold and an ejection component, the fixed mold and the movable mold are oppositely arranged, and the fixed mold is used for ensuring positioning between the fixed mold and the movable mold; a cavity is formed in the side, close to the movable mold, of the fixed mold, is of a frame structure and is used for material forming; sub-runners are arranged on an inner ring of the mold cavity, the sub-runners are arranged in a radial shape and are used for guiding materials into the mold cavity, and a plurality of excess material cavities are connected to an outer ring of the mold cavity and are used for receiving the materials overflowing from the mold cavity; a main runner is arranged in the middle of the movable mold and is used for injecting materials into the sub-runners; a plurality of positioning rods are arranged on the side, close to the fixed mold, of the movable mold and used for positioning the movable mold. According to the injection mold provided by the utility model, the problems that the injection molding is not full and the product quality is unstable in the existing injection molding process are solved by changing the runner structure.

Description

Technical Field

[0001] The utility model belongs to the field of injection molds, and in particular relates to an injection mold. Background Art

[0002] A mold is a tool used to make products of specific shapes, among which the flow channel structure of the mold determines the important factor of product molding.

[0003] During the injection molding process, the injection molding machine usually injects the material into the runner through the nozzle and into the mold cavity. For products with frame structures, during the injection molding process, the material is filled into the cavity through the runner. After being injected into the runner, it cools down rapidly, resulting in the cavity not being filled with material, resulting in uneven filling and unstable product quality.

[0004] In summary, in the injection molding process, problems such as incomplete injection and unstable product quality are prone to occur, which is not conducive to large-scale production. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide an injection mold, aiming to solve the problems of incomplete injection and unstable product quality in the injection molding process of the prior art, which is not conducive to large-scale production.

[0006] The embodiment of the utility model is implemented as follows: the injection mold includes a fixed mold, a movable mold and an ejector assembly; the fixed mold is arranged opposite to the movable mold, and the fixed mold is used to ensure the positioning between the fixed mold and the movable mold; a cavity is provided on the side of the fixed mold close to the movable mold, and the cavity is arranged into a frame structure, and the cavity is used for material molding; a sub-flow channel is provided on the inner circle of the cavity, and the sub-flow channel is arranged radially, and the sub-flow channel is used to guide the material of the main flow channel into the cavity, and the outer circle of the cavity is connected with a plurality of residual material cavities, and the residual material cavities are used to receive the material overflowing from the cavity; a main flow channel is provided in the middle of the movable mold, and the main flow channel runs through the movable mold, and the main flow channel is used to supply materials to be injected into the sub-flow channel; a plurality of positioning rods are provided on the side of the movable mold close to the fixed mold, and the positioning rods are used to position the movable mold; the ejector assembly is installed inside the fixed mold, and the ejector assembly is used to eject the product from the cavity.

[0007] Preferably, the fixed mold includes: a first mold plate, a second mold plate and a third mold plate;

[0008] The first template is configured to be rectangular, and the first template is used to install the second template;

[0009] The second template is installed on a side of the first template close to the movable mold, the second template is set to be a rectangle with a plurality of through holes, and the second template is used to install the third template;

[0010] The third template is installed on a side of the second template away from the first template, and the cavity and the sub-flow channel are provided on a side of the third template close to the movable mold.

[0011] Preferably, a groove is provided on one side of the second template connected to the first template, the groove is used to install the ejection assembly, and a plurality of through holes are provided in the groove.

[0012] Preferably, the four corners of the third template are provided with first positioning holes for positioning rods to pass through, the bottom of the residual material cavity is provided with a through hole for the ejection assembly to pass through, and the periphery of the sub-flow channel is provided with second positioning holes for pressure rods to pass through.

[0013] Preferably, the movable mold includes: a fourth template, a fifth template and a positioning rod; the shape and size of the fourth template are consistent with those of the first template, and the fourth template is used to install the fifth template; the fifth template is installed on the side of the fourth template close to the fixed mold, and the four corners of the fifth template are provided with countersunk holes for the positioning rod to pass through; four positioning rods are provided, and the positioning rods are respectively installed in the countersunk holes of the fifth template, and the positioning rods are used to position the positioning assembly.

[0014] Preferably, the ejection assembly comprises: a flat frame, a push block, a spring and a pressure rod; the flat frame is arranged in the groove of the second template, the flat frame is composed of a plurality of strip rods, the middle part and the outer ring of the flat frame are provided with a boss for installing the push block, and the intersection of the outer periphery of the flat frame is provided with a round table for supporting the spring; there are a plurality of bosses, the push block is arranged on the side of the flat frame close to the third template through a connecting rod, the shape of the push block is consistent with the shape of the residual material cavity, and the push block is used to eject the molded product from the cavity; there are a plurality of springs, the spring is arranged at the bottom of the round table of the flat frame, the spring is used to push the flat frame to drive the push block to eject the molded product in the cavity; there are a plurality of pressure rods, the pressure rod passes through the third template through the through hole opened on the fifth template, and the pressure rod is used to press the flat frame.

[0015] Preferably, the depth of the cavity is greater than the depth of the sub-channel.

[0016] Preferably, the residual material cavity is connected to the mold cavity via a groove, and the depth of the groove is smaller than the depth of the mold cavity.

[0017] An injection mold provided by the embodiment of the utility model has the following beneficial effects compared with the prior art:

[0018] 1. By changing the layout structure of the sub-runner to a radial shape, the material is dispersed from the main channel through the sub-runner, and the material is evenly dispersed into the cavity, solving the problem of incomplete injection.

[0019] 2. By adding the ejector assembly, the product can be quickly and conveniently removed from the mold during demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the first three-dimensional structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the explosion three-dimensional structure of the utility model;

[0022] Figure 3 It is a partial three-dimensional structural schematic diagram of the utility model;

[0023] Figure 4 It is a partial three-dimensional structural schematic diagram of the utility model;

[0024] Figure 5 It is a three-dimensional structural schematic diagram of the ejection assembly of the utility model;

[0025] In the accompanying drawings: 1. fixed mold; 101. first template; 102. second template; 103. third template; 104. cavity; 105. sub-flow channel; 106. residual material cavity; 107. first positioning hole; 108. second positioning hole; 109. groove; 2. movable mold; 201. fourth template; 202. fifth template; 203. main flow channel, 204. positioning rod; 205. countersunk hole; 3. ejector assembly; 301. flat frame; 302. round table; 303. connecting rod; 304. push block; 305. spring. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] The specific implementation of the present utility model is described in detail below in conjunction with specific embodiments.

[0028] like Figure 1-2 As shown, it is a structural diagram of an injection mold provided by an embodiment of the utility model, including:

[0029] A fixed mold 1, a movable mold 2 and an ejector assembly; the fixed mold 1 and the movable mold 2 are arranged opposite to each other, and the fixed mold 1 is used to ensure the positioning between the fixed mold 1 and the movable mold 2; a cavity 104 is provided on the side of the fixed mold 1 close to the movable mold 2, and the cavity 104 is arranged as a frame structure, and the cavity 104 is used for material molding; a sub-flow channel 105 is provided in the inner circle of the cavity 104, and the sub-flow channel 105 is arranged radially, and the sub-flow channel 105 is used to guide the material of the main flow channel into the cavity 104, The outer circle of the cavity 104 is connected to a plurality of residual material cavities 106, and the residual material cavities 106 are used to receive the material overflowing from the cavity 104; a main flow channel is provided in the middle of the movable mold 2, and the main flow channel runs through the movable mold 2, and the main flow channel is used to inject the material into the sub-flow channel 105; a plurality of positioning rods are provided on the side of the movable mold 2 close to the fixed mold 1, and the positioning rods are used to position the movable mold 2; the ejector assembly is installed inside the fixed mold 1, and the ejector assembly is used to eject the product from the cavity 104.

[0030] In an embodiment of the utility model, the ejection assembly is arranged inside the fixed mold 1. During injection molding, the movable mold 2 is fitted with the fixed mold 1. The material is injected through the main channel of the fixed mold 1 and then evenly dispersed into the cavity 104 through the sub-channel 105. The material overflowing from the cavity 104 is received in the residual material cavity 106. The material is cooled and shaped in the cavity 104 and then ejected from the fixed mold 1 through the ejection assembly. The fixed mold 1 is fixed to the fixed end of the injection molding equipment by a clamp, and the movable mold 2 is installed at the power end by a clamp. The power end and the fixed end are arranged face to face. After the equipment is started, the power end moves toward the fixed end.

[0031] In one example of the utility model, during injection molding, the movable mold 2 moves toward the fixed mold 1, and when the fifth template 202 has not yet fitted with the countersunk hole of the third template 103, the pressure rod contacts the position of the flat frame truncated table, pressing the flat frame downward, and the push block and the connecting rod descend together, and the bottom spring is compressed. When the top of the push block is flush with the bottom of the residual material cavity 106, the material is injected from the main channel and evenly dispersed into the cavity 104 through the sub-channel 105. The material overflowing from the cavity 104 is received in the residual material cavity 106. After the material is cooled and formed, the movable mold 2 is separated from the fixed mold 1. At this time, the pressure rod is separated from the flat frame, and the ejection assembly ejects the residual material in the residual material cavity 106 together with the finished product in the cavity 104 and the material in the sub-channel 105 and the main channel under the elastic force of the spring.

[0032] like Figure 2As shown, as a preferred embodiment of the utility model, the fixed mold 1 includes: a first template 101, a second template 102 and a third template 103 countersink; the first template 101 is arranged in a rectangular shape, and the first template 101 is used to install the second template 102; the second template 102 is installed on the side of the first template 101 close to the movable mold 2, and the second template 102 is arranged in a rectangle with a plurality of through holes, and the second template 102 is used to install the third template 103 countersink; the third template 103 countersink is installed on the side of the second template 102 away from the first template 101, and the side of the third template 103 countersink close to the movable mold 2 is provided with the cavity 104 and the sub-flow channel 105.

[0033] In an embodiment of the utility model, the fixed surface of the first template 101 is a side connected to the fixed end of the injection molding equipment, the mounting surface of the first template 101 is used to mount the second template 102, and the other side of the second template 102 connected to the first template 101 is used to mount the countersunk hole of the third template 103, the shape and size of the countersunk hole of the third template 103 are consistent with the shape and size of the second template 102, the second template 102 and the third template 103 countersunk hole are locked by screws from the connecting surface of the second template 102 and the first template 101, and the second template 102 is locked to the second template 102 by screws from the fixed surface of the first template 101.

[0034] like Figure 3 As shown in the countersunk hole, as a preferred embodiment of the present invention, a groove 109 is provided on one side where the second template 102 is connected to the first template 101 . The groove 109 is used to install the ejection assembly, and there are several through holes in the groove 109 .

[0035] In the embodiment of the utility model, a groove 109 is provided on one side where the second template 102 is connected to the first template 101. The contour of the groove 109 is consistent with the shape of the bottom of the ejector assembly, so that the ejector assembly can slide in the groove 109. A through hole for the connecting rod to pass through is also provided inside the groove 109. The four corners of the second template 102 are provided with threaded holes for connecting with the first template 101.

[0036] like Figure 4 As shown, as a preferred embodiment of the utility model, the countersunk hole of the third template 103 is provided with first positioning holes 107 for the positioning rod to pass through at the four corners, the bottom of the residual material cavity 106 is provided with a through hole for the ejection assembly to pass through, and the sub-flow channel 105 is provided with second positioning holes 108 for the pressure rod to pass through around it.

[0037] In the embodiment of the utility model, a frame-shaped cavity 104 is formed on one side of the countersink of the third template 103 close to the movable mold 2, a radial sub-channel 105 is formed on the inner circle of the cavity 104, a plurality of excess material cavities 106 are formed on the outer circle of the cavity 104, the excess material cavities 106 are connected to the cavity 104 by grooves 109, and a through hole for the connecting rod to pass through is formed at the bottom of the excess material cavity 106; first positioning holes 107 matching the positioning rod are also formed at the four corners of the countersink of the third template 103, and a threaded hole for connecting with the second template 102 is formed on the other side of the countersink of the third template 103.

[0038] In one example of the present invention, the material is evenly dispersed into the cavity 104 through the sub-flow channel 105, and the material overflowing from the cavity 104 is guided into the residual material cavity 106 through the groove 109. After the material is cooled and formed, the material in the residual material cavity 106 is demolded together with the finished product in the cavity 104 and the material in the sub-flow channel 105.

[0039] like Figure 2 As shown, as a preferred embodiment of the utility model, the movable mold 2 includes: a fourth template 201, a fifth template 202 and a positioning rod; the shape and size of the fourth template 201 are consistent with those of the first template 101, and the fourth template 201 is used to install the fifth template 202; the fifth template 202 is installed on the side of the fourth template 201 close to the fixed mold 1, and the four corners of the fifth template 202 are provided with countersunk holes for the positioning rod to pass through; four positioning rods are provided, and the positioning rods are respectively installed in the countersunk holes of the fifth template 202, and the positioning rods are used to position the positioning assembly.

[0040] In an embodiment of the utility model, a side of the fourth template 201 connected to the power end is a fixed surface, and a side away from the first fixed surface is an installation surface, and the installation surface is used to install the fifth template 202. The fixed surface of the fourth template 201 is provided with a plurality of threaded holes, and a side of the fifth template 202 connected to the fourth template 201 is provided with threaded holes in the same position, and the fourth template 201 and the fifth template 202 are connected by screws. Countersunk holes consistent with the positioning holes on the countersunk holes of the third template 103 are provided at the four corners of the fourth template 201, and the countersunk holes are used to install the positioning rod, and a boss is provided on the top of the positioning rod, and the size of the boss is consistent with the size of the countersunk hole; the fifth template 202 is provided with a pressure rod installed through a through hole set in the middle position, and the pressure rod is used to extrude and fix the component.

[0041] In an example of the present invention, a main channel is provided between the fourth template 201 and the fifth template 202 . The main channel is in a conical structure, and the diameter of the main channel close to the fixed mold 1 is larger than the diameter of the fixed surface of the fourth template 201 of the main channel.

[0042] like Figure 5As shown, as a preferred embodiment of the utility model, the ejection assembly includes: a flat frame, a push block, a spring and a pressure rod; the flat frame is arranged in the groove 109 of the second template 102, the flat frame is composed of a plurality of strip rods, the middle part and the outer ring of the flat frame are provided with a boss for installing the push block, and the intersection of the outer periphery of the flat frame is provided with a truncated table for supporting the spring; there are several bosses, the push block is arranged on the side of the flat frame close to the countersunk hole of the third template 103 through a connecting rod, the shape of the push block is consistent with the shape of the residual material cavity 106, and the push block is used to eject the molded product from the cavity 104; there are several springs, the springs are arranged at the bottom of the truncated table of the flat frame, the springs are used to push the flat frame to drive the push block to eject the molded product in the cavity 104; there are several pressure rods, the pressure rod passes through the countersunk hole of the third template 103 through the through hole opened on the fifth template 202, and the pressure rod is used to press the flat frame.

[0043] In the embodiment of the utility model, the flat frame is arranged in the groove 109 of the second template 102, and the outer contour of the flat frame is smaller than the contour of the groove 109, so that the flat frame can slide in the groove 109, and a connecting rod is arranged on the top of the flat frame, and the connecting rod passes through the through hole opened in the groove 109 of the second template 102 until it enters the countersunk residual material cavity 106 of the third template 103; a push block is arranged inside the residual material cavity 106, and the bottom of the push block is connected to the top of the connecting rod; a spring is installed at the bottom of the round table of the flat frame, and the spring is installed between the first template 101 and the flat frame;

[0044] In an example of the utility model, in a natural state, the spring is in an expanded state, and the ejection assembly is ejected upward. During injection molding, the ejection assembly is squeezed by the pressure rod to compress the spring. After the injection molding is completed, the pressure rod is separated from the ejection assembly, and the ejection assembly ejects the product in the fixed mold 1 under the thrust of the spring.

[0045] like Figure 4 As shown, as a preferred embodiment of the present invention, the depth of the cavity 104 is greater than the depth of the sub-channel 105 .

[0046] In the embodiment of the utility model, the sub-channel 105 is used to disperse the material into the cavity 104. The material in the cavity 104 is the final desired product. After demolding, the residual material in the sub-channel 105 needs to be removed, so the depth of the sub-channel 105 is reduced. When cutting, the remaining amount is small, which has little impact on the product itself. At the same time, the remaining material cut off can be reused.

[0047] like Figure 4As shown, as a preferred embodiment of the present utility model, the residual material cavity 106 is connected to the mold cavity 104 via a groove 109 , and the depth of the groove 109 is less than the depth of the mold cavity 104 .

[0048] In the embodiment of the utility model, the residual material cavity 106 is used to receive the material overflowing from the cavity 104, while ensuring that the material in the cavity 104 needs to fill the cavity 104. The smaller the depth of the groove 109 connecting the cavity 104 and the residual material cavity 106, the more difficult it is for the material in the cavity 104 to overflow into the residual material cavity 106.

[0049] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold, characterized in that: The injection mold comprises a fixed mold, a movable mold and an ejector assembly; The fixed mold and the movable mold are arranged opposite to each other, and the fixed mold is used to ensure the positioning between the fixed mold and the movable mold; a cavity is provided on one side of the fixed mold close to the movable mold, and the cavity is arranged in a frame structure, and the cavity is used for material molding; a sub-flow channel is provided in the inner circle of the cavity, and the sub-flow channel is arranged in a radial shape, and the sub-flow channel is used to guide the material of the main flow channel into the cavity; a plurality of residual material cavities are connected to the outer circle of the cavity, and the residual material cavity is used to receive the material overflowing from the cavity; A main flow channel is provided in the middle of the movable mold, the main flow channel runs through the movable mold, and the main flow channel is used to inject materials into the sub-flow channel; a plurality of positioning rods are provided on the side of the movable mold close to the fixed mold, and the positioning rods are used to position the movable mold; The ejector assembly is installed inside the fixed mold, and is used to eject the product from the cavity.

2. An injection mold according to claim 1, characterized in that: The fixed mold comprises: a first mold plate, a second mold plate and a third mold plate; The first template is configured to be rectangular, and the first template is used to install the second template; The second template is installed on a side of the first template close to the movable mold, the second template is set to be a rectangle with a plurality of through holes, and the second template is used to install the third template; The third template is installed on a side of the second template away from the first template, and the cavity and the sub-flow channel are provided on a side of the third template close to the movable mold.

3. An injection mold according to claim 2, characterized in that: A groove is provided on one side of the second template connected to the first template. The groove is used to install the ejection assembly, and a plurality of through holes are arranged in the groove.

4. An injection mold according to claim 2, characterized in that: The third template is provided with first positioning holes at four corners for positioning rods to pass through, the bottom of the residual material cavity is provided with a through hole for the ejection assembly to pass through, and the sub-flow channel is provided with second positioning holes around it for the pressure rod to pass through.

5. The injection mold according to claim 2, characterized in that: The movable mold comprises: a fourth mold plate, a fifth mold plate and a positioning rod; The shape and size of the fourth template are consistent with those of the first template, and the fourth template is used to install the fifth template; The fifth template is installed on a side of the fourth template close to the fixed mold, and countersunk holes for positioning rods to pass through are provided at four corners of the fifth template; There are four positioning rods, which are respectively installed in the countersunk holes of the fifth template, and are used to position the positioning assembly.

6. The injection mold according to claim 1, characterized in that: The ejection assembly comprises: a flat frame, a push block, a spring and a pressure rod; The flat frame is arranged in the groove of the second template, and the flat frame is composed of a plurality of strip-shaped bars spliced ​​together. The middle part and the outer ring of the flat frame are provided with bosses for mounting the push block, and the intersection of the outer periphery of the flat frame is provided with a round table for supporting the spring; The bosses are provided in plurality, and the push block is provided on a side of the flat frame close to the third template through a connecting rod. The shape of the push block is consistent with the shape of the residual material cavity, and the push block is used to eject the molded product from the cavity; The springs are provided in plurality and are arranged at the bottom of the round table of the flat frame. The springs are used to push the flat frame to drive the push block to eject the molded product in the cavity. A plurality of pressure rods are provided, and the pressure rods pass through the third template through the through holes provided on the fifth template, and the pressure rods are used to press the flat rack.

7. The injection mold according to claim 1, characterized in that: The depth of the cavity is greater than the depth of the sub-flow channel.

8. The injection mold according to claim 1, characterized in that: The residual material cavity is connected to the mold cavity via a groove, and the depth of the groove is smaller than the depth of the mold cavity.

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