Injection mold sprue bush

Abstract

The utility model provides a sprue bush of an injection mold, and belongs to the technical field of sprue bushes. The injection mold sprue bush comprises a sprue bush assembly, an anti-wiredrawing assembly is arranged at the bottom of the sprue bush assembly, the sprue bush assembly comprises a fixed flange, a nozzle groove is formed in the middle of the bottom end of the fixed flange, sliding block grooves are formed in the two sides of the nozzle groove, and first spring cavities are formed in one sides of the interiors of the sliding block grooves; the anti-wiredrawing assembly comprises two sliding blocks, the sliding blocks are slidably connected with the sliding block grooves, a second spring cavity is formed in one side of each sliding block, a closing part is arranged on the other side of each sliding block, a slope is arranged at the bottom of each closing part, and a pushing spring is fixedly installed in each second spring cavity; the other end of the pushing spring is arranged in the first spring cavity, and the pushing spring is fixedly connected with the first spring cavity, the wire drawing phenomenon can be effectively avoided, and high practical value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of sprue bushes, and more specifically, to a sprue bush for an injection mold. Background Art

[0002] The sprue bush, also known as the nozzle, pouring nozzle, and sprue pouring nozzle, is a component of the runner that allows the molten plastic material to be injected from the nozzle of the injection molding machine into the interior of the mold, and is a metal fitting used to connect the molding mold and the injection molding machine.

[0003] Based on the above, the inventor found the following problems: When the current sprue bush of the injection mold is demolded after injection molding, the plastic at the gate is not completely cured or cooled, resulting in filamentous tails when separating from the main body of the product, affecting the appearance quality of the product and the convenience of subsequent processing, and being inconvenient to use.

[0004] Therefore, in view of this, the existing structure and deficiencies are studied and improved to provide a sprue bush for an injection mold, with the expectation of achieving a more practical value. Summary of the Utility Model

[0005] To solve the above technical problems, an embodiment of the utility model provides a sprue bush for an injection mold, which is specifically realized through the following technical solutions:

[0006] A sprue bush for an injection mold includes a sprue bush assembly. A wire drawing prevention assembly is provided at the bottom of the sprue bush assembly. The sprue bush assembly includes a fixed flange. A nozzle groove is opened in the middle of the bottom end of the fixed flange. Slide block grooves are opened on both sides of the nozzle groove. A first spring cavity is opened on one side inside the slide block groove. The wire drawing prevention assembly includes two sliding blocks. The sliding blocks are slidably connected to the slide block grooves. A second spring cavity is opened on one side of the sliding block. A closing part is provided on the other side of the sliding block. A slope is provided at the bottom of the closing part. A top push spring is fixedly installed inside the second spring cavity. The other end of the top push spring is arranged inside the first spring cavity, and the top push spring is fixedly connected to the first spring cavity.

[0007] The beneficial effect of adopting the above further scheme is that, by providing a wire drawing prevention assembly at the bottom of the sprue bush assembly, it is convenient to prevent wire drawing during demolding. Through the setting of the fixed flange, it is convenient to fixedly install the device on the mounting plate of the injection mold. Through the nozzle groove opened in the middle of the bottom end of the fixed flange, it is convenient for the nozzle of the injection molding machine to be inserted into the nozzle groove for injection molding. Through the slope provided at the bottom of the closing part, it is convenient for the nozzle to be inserted into the nozzle groove during injection molding to push the two sliding blocks to both sides and compress the top push spring. Through the other end of the top push spring being arranged inside the first spring cavity and the top push spring being fixedly connected to the first spring cavity, it is convenient for the nozzle to be withdrawn from the nozzle groove after injection molding. The elastic force of the top push spring makes the two sliding blocks approach each other, closing the two closing parts to clamp off the molten plastic and avoid wire drawing.

[0008] Further, guiding sliding grooves are formed on both sides of the sliding block groove.

[0009] The beneficial effect of adopting the above further solution is that by forming guiding sliding grooves on both sides of the sliding block groove, it is convenient for the guiding sliding grooves to guide the sliding of the sliding block.

[0010] Further, guiding sliding blocks are arranged on both sides of the sliding block, and the guiding sliding blocks are slidably connected with the guiding sliding grooves.

[0011] The beneficial effect of adopting the above further solution is that by arranging guiding sliding blocks on both sides of the sliding block and slidably connecting the guiding sliding blocks with the guiding sliding grooves, it is convenient for the sliding block to slide along the guiding sliding grooves and improve the sliding stability of the sliding block.

[0012] Further, a filling nozzle is arranged on the top of the fixed flange, and a flow channel is formed inside the filling nozzle.

[0013] The beneficial effect of adopting the above further solution is that by arranging a filling nozzle on the top of the fixed flange and forming a flow channel inside the filling nozzle, it is convenient for the molten plastic to flow inside the flow channel during injection molding.

[0014] Further, a diversion channel is formed on the top of the nozzle groove, and the diversion channel is in a hemispherical structure.

[0015] The beneficial effect of adopting the above further solution is that by forming a diversion channel on the top of the nozzle groove and the diversion channel being in a hemispherical structure, it is convenient for the nozzle to be inserted into the nozzle groove and fit with the diversion channel during injection molding, so that the molten plastic can smoothly flow into the flow channel inside.

[0016] Further, the diversion channel is communicated with the flow channel, and the inner diameter of the flow channel at the end far from the diversion channel is larger than the inner diameter at the end close to the diversion channel.

[0017] The beneficial effect of adopting the above further solution is that by the inner diameter of the flow channel at the end far from the diversion channel being larger than the inner diameter at the end close to the diversion channel, it is convenient to reduce the generation of shear heat and protect the material properties.

[0018] Further, fixing grooves are formed at both ends of the bottom of the fixed flange, and screw holes are formed in the middle of the inner sides of the fixing grooves.

[0019] The beneficial effect of adopting the above further solution is that by forming fixing grooves at both ends of the bottom of the fixed flange and screw holes in the middle of the inner sides of the fixing grooves, it is convenient to use fixing screws to fixedly install the device on the mounting plate of the injection mold.

[0020] The beneficial effects of the present utility model are as follows: An injection mold sprue bushing obtained by the above design in the present utility model. In this injection mold sprue bushing, an anti-drawing component is provided at the bottom of the sprue bushing assembly, which is convenient for preventing drawing during demolding. Through the setting of the fixed flange, it is convenient to fixedly install the device on the mounting plate of the injection mold. A nozzle groove is provided in the middle of the bottom end of the fixed flange, which is convenient for the nozzle of the injection molding machine to be inserted into the nozzle groove for injection molding. A slope is provided at the bottom of the closing part, which is convenient for the nozzle to be inserted into the nozzle groove during injection molding to push the two sliding blocks to both sides and compress the top push spring. The other end of the top push spring is arranged inside the first spring cavity, and the top push spring is fixedly connected to the first spring cavity, which is convenient for the nozzle to be withdrawn from the nozzle groove after injection molding. The elastic force of the top push spring makes the two sliding blocks approach each other, so that the two closing parts are closed to clamp off the molten plastic, avoiding the occurrence of drawing phenomenon. This utility model can effectively prevent the occurrence of drawing phenomenon and has high practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a three-dimensional structural schematic diagram of an injection mold sprue bushing provided by the present utility model;

[0023] Figure 2 is an exploded view of an injection mold sprue bushing provided by the present utility model;

[0024] Figure 3 is the first sectional view of the sprue bushing assembly provided by the present utility model;

[0025] Figure 4 is the second sectional view of the sprue bushing assembly provided by the present utility model;

[0026] Figure 5 is a three-dimensional structural schematic diagram of the sliding block provided by the present utility model.

[0027] In the figure: 101, sprue bushing assembly; 10101, nozzle; 10102, fixed flange; 10103, nozzle groove; 10104, fixed groove; 10105, screw hole; 10106, slider groove; 10107, guiding chute; 10108, diversion groove; 10109, runner; 10110, first spring cavity; 102, anti-drawing wire assembly; 10201, sliding block; 10202, second spring cavity; 10203, guiding slider; 10204, pushing spring; 10205, ramp; 10206, closing part. Detailed implementation manners

[0028] To make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1 of an injection mold sprue bushing of the present utility model

[0031] The present utility model provides the following technical solutions: As Figures 1 - 5As shown in the figure, an injection mold sprue bushing includes a sprue bushing assembly 101. A wire-drawing prevention assembly 102 is provided at the bottom of the sprue bushing assembly 101. By providing the wire-drawing prevention assembly 102 at the bottom of the sprue bushing assembly 101, it is convenient to prevent wire-drawing during demolding. The sprue bushing assembly 101 includes a fixed flange 10102. By setting the fixed flange 10102, it is convenient to fixedly install the device on the mounting plate of the injection mold. A nozzle groove 10103 is provided in the middle of the bottom end of the fixed flange 10102. By providing the nozzle groove 10103 in the middle of the bottom end of the fixed flange 10102, it is convenient for the nozzle of the injection molding machine to be inserted into the nozzle groove 10103 for injection molding. Slide grooves 10106 are provided on both sides of the nozzle groove 10103. A first spring cavity 10110 is provided on one side inside the slide groove 10106. The wire-drawing prevention assembly 102 includes two sliding blocks 10201. The sliding blocks 10201 are slidably connected to the slide grooves 10106. A second spring cavity 10202 is provided on one side of the sliding block 10201. And a closing part 10206 is provided on the other side of the sliding block 10201. A slope 10205 is provided at the bottom of the closing part 10206. By providing the slope 10205 at the bottom of the closing part 10206, it is convenient for the nozzle to push the two sliding blocks 10201 to both sides and compress the pushing spring 10204 when inserting into the nozzle groove 10103 during injection molding. A pushing spring 10204 is fixedly installed inside the second spring cavity 10202. The other end of the pushing spring 10204 is arranged inside the first spring cavity 10110, and the pushing spring 10204 is fixedly connected to the first spring cavity 10110. By arranging the other end of the pushing spring 10204 inside the first spring cavity 10110 and fixedly connecting the pushing spring 10204 to the first spring cavity 10110, it is convenient for the nozzle to be withdrawn from the nozzle groove 10103 after injection molding. The elastic force of the pushing spring 10204 makes the two sliding blocks 10201 approach each other, so that the two closing parts 10206 are closed to clamp off the molten plastic and avoid wire-drawing phenomenon.

[0032] Embodiment 2 of an injection mold sprue bushing of the present utility model

[0033] Refer to Figures 1 - 5As shown, guiding sliding grooves 10107 are provided on both sides of the slider groove 10106. By providing the guiding sliding grooves 10107 on both sides of the slider groove 10106, it is convenient for the guiding sliding grooves 10107 to guide the sliding of the sliding block 10201. Guiding sliders 10203 are provided on both sides of the sliding block 10201, and the guiding sliders 10203 are slidably connected to the guiding sliding grooves 10107. By providing the guiding sliders 10203 on both sides of the sliding block 10201 and the guiding sliders 10203 being slidably connected to the guiding sliding grooves 10107, it is convenient for the sliding block 10201 to slide along the guiding sliding grooves 10107, improving the stability of the sliding of the sliding block 10201. A nozzle 10101 is provided on the top of the fixed flange 10102, and a flow channel 10109 is provided inside the nozzle 10101. By providing the nozzle 10101 on the top of the fixed flange 10102 and the flow channel 10109 being provided inside the nozzle 10101, it is convenient for the molten plastic to flow inside the flow channel 10109 during injection molding. A diversion channel 10108 is provided on the top of the nozzle groove 10103, and the diversion channel 10108 is in a hemispherical structure. By providing the diversion channel 10108 on the top of the nozzle groove 10103 and the diversion channel 10108 being in a hemispherical structure, it is convenient for the nozzle to be inserted into the nozzle groove 10103 and fit with the diversion channel 10108 during injection molding, enabling the molten plastic to smoothly flow into the inside of the flow channel 10109.

[0034] Embodiment Three of a Gate Bush for an Injection Mold of the Present Utility Model

[0035] Referring to Figures 1 - 5 As shown, the diversion channel 10108 is communicated with the flow channel 10109, and the inner diameter of the end of the flow channel 10109 far from the diversion channel 10108 is larger than the inner diameter of the end close to the diversion channel 10108. By the inner diameter of the end of the flow channel 10109 far from the diversion channel 10108 being larger than the inner diameter of the end close to the diversion channel 10108, it is convenient to reduce the generation of shear heat and protect the material properties. Fixing grooves 10104 are provided at both ends of the bottom of the fixed flange 10102, and screw holes 10105 are provided in the middle of the inner sides of the fixing grooves 10104. By providing the fixing grooves 10104 at both ends of the bottom of the fixed flange 10102 and the screw holes 10105 being provided in the middle of the inner sides of the fixing grooves 10104, it is convenient to fixedly install the device on the mounting plate of the injection mold using fixing screws.

[0036] Specifically, the working principle of this injection mold sprue bushing: During use, fixing grooves 10104 are provided at both ends of the bottom of the fixing flange 10102, and screw holes 10105 are provided in the middle of the inner side of the fixing grooves 10104, which facilitates the use of fixing screws to fixedly install the device on the mounting plate of the injection mold. A nozzle groove 10103 is provided in the middle of the bottom end of the fixing flange 10102, which facilitates the nozzle of the injection molding machine to be inserted into the nozzle groove 10103 for injection molding. A slope 10205 is provided at the bottom of the closing part 10206, which facilitates the nozzle to be inserted into the nozzle groove 10103 during injection molding to push the two sliding blocks 10201 to both sides and compress the push spring 10204. Guide sliders 10203 are provided on both sides of the sliding block 10201, and the guide sliders 10203 are slidably connected to the guide chute 10107, which facilitates the sliding block 10201 to slide along the guide chute 10107 and improves the sliding stability of the sliding block 10201. A diversion groove 10108 is provided at the top of the nozzle groove 10103, and the diversion groove 10108 has a hemispherical structure, which facilitates the nozzle to be inserted into the nozzle groove 10103 and fit with the diversion groove 10108 during injection molding, so that the molten plastic can smoothly flow into the runner 10109. The inner diameter of the end of the runner 10109 far from the diversion groove 10108 is larger than the inner diameter of the end close to the diversion groove 10108, which facilitates reducing the generation of shear heat and protecting the material properties. The other end of the push spring 10204 is arranged inside the first spring chamber 10110, and the push spring 10204 is fixedly connected to the first spring chamber 10110, which facilitates the nozzle to be withdrawn from the nozzle groove 10103 after injection molding. The elastic force of the push spring 10204 causes the two sliding blocks 10201 to approach each other, so that the two closing parts 10206 are closed to clamp off the molten plastic and avoid the phenomenon of wire drawing.

[0037] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sprue bushing for an injection mold, characterized in that: The invention comprises a sprue sleeve assembly (101), wherein an anti-wire drawing assembly (102) is provided at the bottom of the sprue sleeve assembly (101), wherein the sprue sleeve assembly (101) comprises a fixed flange (10102), wherein a nozzle groove (10103) is provided at the middle of the bottom end of the fixed flange (10102), wherein slider grooves (10106) are provided on both sides of the nozzle groove (10103), wherein a first spring cavity (10110) is provided on one side of the slider groove (10106), wherein the anti-wire drawing assembly (102) comprises two sliding blocks (10201), wherein the sliding blocks (10201) and the sliding blocks (10201) are connected to each other. The block groove (10106) is slidably connected, a second spring cavity (10202) is opened on one side of the sliding block (10201), and a closing portion (10206) is provided on the other side of the sliding block (10201), a slope (10205) is provided at the bottom of the closing portion (10206), a push spring (10204) is fixedly installed inside the second spring cavity (10202), the other end of the push spring (10204) is arranged inside the first spring cavity (10110), and the push spring (10204) is fixedly connected to the first spring cavity (10110).

2. The injection mold sprue bushing according to claim 1, characterized in that: Guide sliding grooves (10107) are provided on both sides of the sliding block groove (10106).

3. The injection mold sprue bushing according to claim 2, characterized in that: Guide slide blocks (10203) are provided on both sides of the sliding block (10201), and the guide slide blocks (10203) are slidably connected to the guide sliding grooves (10107).

4. The injection mold sprue bushing according to claim 1, characterized in that: A filling nozzle (10101) is provided at the top of the fixed flange (10102), and a flow channel (10109) is provided inside the filling nozzle (10101).

5. The injection mold sprue bushing according to claim 4, characterized in that: A guide groove (10108) is provided on the top of the nozzle groove (10103), and the guide groove (10108) is a hemispherical structure.

6. The injection mold sprue bushing according to claim 5, characterized in that: The guide groove (10108) is connected to the flow channel (10109), and the inner diameter of the end of the flow channel (10109) away from the guide groove (10108) is larger than the inner diameter of the end close to the guide groove (10108).

7. The injection mold sprue bushing according to claim 1, characterized in that: The fixing flange (10102) has fixing grooves (10104) at both ends of the bottom, and a screw hole (10105) is provided in the middle of the inner side of the fixing groove (10104).

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