A hot runner anti-bubble molding die

Abstract

This utility model discloses a hot runner anti-bubble molding die, relating to the field of hot runner molding die technology. The utility model includes a base, with a lower mold base body fixedly connected to the top of the base. An upper mold base body is positioned above the lower mold base body. Connecting support plates are symmetrically arranged on both sides of the upper mold base body. Electric push rods are symmetrically fixedly mounted on the top of the base on both sides of the lower mold base body, with the upper ends of the electric push rods fixedly connected to the connecting support plates. This utility model uses bubble-piercing spikes and defoaming threads to pierce and cut away bubbles in the molten material. A filter screen further removes bubbles, effectively preventing bubbles from entering the mold cavity between the lower and upper mold base bodies, thus improving molding quality. By unscrewing the bolts, the stirring shaft, stirring crossbar, and filter screen can be removed from the inside of the barrel, facilitating cleaning of the inner wall of the barrel and its internal defoaming structure.

Description

Technical Field

[0001] This utility model belongs to the field of hot runner molding die technology, and in particular relates to a hot runner anti-bubble molding die. Background Technology

[0002] Hot runner molds are molds that use heating devices to prevent the melt inside the runner from solidifying. Because they have a shorter forming cycle than traditional molds and save more raw materials, hot runner molds are widely used in industrialized countries and regions around the world. A search revealed patent application number 202420858940.3, which discloses a hot runner anti-bubble molding mold. This utility model includes a support assembly, a lower mold base assembly, a lower sealing assembly, and an upper sealing assembly. The support assembly includes a support plate, a support rod on top of the support plate, and a fixed shaft inside the support plate. The lower mold base assembly includes a lower mold base body rotatably connected to the fixed shaft and an electric telescopic rod rotatably connected to the bottom of the lower mold base body. The lower sealing assembly includes a sealing box at the bottom of the support plate. The upper sealing assembly includes an electric push rod at the bottom of the support plate, a fixed plate at the top of the electric push rod, and a top cover on the fixed plate.

[0003] However, during actual use, the applicant found that when removing air bubbles from the molten material, the lower mold base body is driven by an electric push rod to move up and down around the hinge axis to clean the air bubbles by shaking. This method of air bubble removal cannot effectively remove air bubbles from the molten material, and during the shaking process, the material is prone to overflow from the lower mold base body. In view of this, we propose a hot runner anti-air bubble molding die. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a hot runner anti-bubble molding die, comprising a base, a lower mold base body fixedly connected to the top of the base, an upper mold base body disposed above the lower mold base body, connecting support plates symmetrically arranged on both sides of the upper mold base body, electric push rods symmetrically fixedly mounted on the top of the base on both sides of the lower mold base body, the upper ends of the electric push rods being fixedly connected to the connecting support plates, a hot runner branch pipe and an exhaust branch pipe fixedly disposed on the top of the upper mold base body, a material cylinder fixedly connected to the upper end of the hot runner branch pipe, and a cylinder cap fixedly fixed to the top of the material cylinder by bolts. A motor is fixedly installed on the top of the cylinder cover. The output end of the motor passes through the cylinder cover and is coaxially fixedly connected to a stirring shaft. Stirring crossbars are evenly spaced along the axial direction on the peripheral wall of the stirring shaft. Bubble-piercing spikes are evenly spaced along the axial direction on the outer wall of the stirring crossbars. A defoaming frame is provided between two adjacent upper and lower stirring crossbars. Defoaming threads are provided on the inner side of the defoaming frame. A filter screen is placed in the material cylinder below the stirring shaft. A feed branch pipe is installed through the cylinder cover on one side of the motor. An exhaust branch pipe is installed through the cylinder cover on the other side of the motor.

[0006] Preferably, the upper part of the barrel is provided with ear seats on both sides symmetrically, and the barrel cover is provided with connecting ears on both sides symmetrically.

[0007] Preferably, the lower end of the bolt passes through the connecting lug and is threaded into the threaded hole at the top of the lug seat.

[0008] Preferably, a placement groove is provided at the bottom of the inner side of the material cylinder, and the filter screen is placed in the placement groove.

[0009] Preferably, three stirring crossbars are arranged in a circular array on the side wall of the stirring shaft of each layer, and several defoaming filaments are arranged side by side at equal intervals inside the defoaming frame. Support frames are symmetrically fixedly connected to both sides of the lower part of the material cylinder, and the lower end of the support frame is fixedly connected to the top of the upper mold base body.

[0010] Preferably, the upper end of the hot runner branch pipe is connected to the inside of the barrel, and a heating coil for heating the inner wall of the barrel is embedded inside the barrel. Telescopic rods are fixedly installed between the bases on the front and rear sides of the electric push rod and the connecting support plate.

[0011] This utility model has the following beneficial effects:

[0012] This utility model discloses a hot runner anti-bubble molding die. A drive motor rotates the stirring shaft and stirring crossbar, causing the bubble-piercing spikes and defoaming threads to rotate around the stirring shaft. These spikes and threads pierce and cut away bubbles in the molten material within the barrel. A filter screen further filters and removes bubbles from the molten material, effectively preventing bubbles from entering the mold cavity between the lower and upper mold bases. This improves the molding quality of the hot runner molding die. By unscrewing the bolts, the cylinder cover can be moved upwards, allowing the stirring shaft, stirring crossbar, and filter screen to be removed from the inside of the barrel. This facilitates cleaning of the inner wall of the barrel and its internal defoaming structure, resulting in better performance. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of a hot runner anti-bubble molding die according to the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of the material cylinder in a hot runner anti-bubble molding die according to the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of the bubble-piercing spikes, bubble-removing frame, and bubble-removing thread in a hot runner anti-bubble molding die of this utility model.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Base; 2. Lower mold base body; 3. Upper mold base body; 31. Connecting support plate; 32. Hot runner branch pipe; 33. Exhaust branch pipe one; 4. Electric push rod; 5. Telescopic rod; 6. Material cylinder; 61. Placement groove; 62. Ear seat; 7. Cylinder cover; 71. Feed branch pipe; 72. Exhaust branch pipe two; 73. Connecting ear; 8. Motor; 9. Stirring shaft; 91. Stirring crossbar; 911. Bubble-piercing spike; 92. Debubbling frame; 921. Debubbling thread; 10. Filter screen; 11. Bolt; 12. Support frame. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 As shown, this utility model provides a technical solution:

[0021] A hot runner anti-bubble molding die includes a base 1, a lower mold base body 2 fixedly connected to the top of the base 1, an upper mold base body 3 disposed above the lower mold base body 2, connecting support plates 31 symmetrically disposed on both sides of the upper mold base body 3, electric push rods 4 symmetrically fixedly mounted on the top of the base 1 on both sides of the lower mold base body 2, the upper end of the electric push rod 4 being fixedly connected to the connecting support plates 31, telescopic rods 5 being fixedly disposed between the base 1 and the connecting support plates 31 on the front and rear sides of the electric push rod 4, and a hot runner branch pipe 32 and an exhaust branch pipe 33 fixedly disposed on the top of the upper mold base body 3. The exhaust branch pipe 33 is configured to be used when injecting molten material into the mold cavities of the lower mold base body 2 and the upper mold base body 3. The hot runner branch pipe 32 is fixedly connected to the upper end of the material cylinder 6, and the upper end of the hot runner branch pipe 32 communicates with the inside of the material cylinder 6. The inside of the material cylinder 6 is embedded with a heating coil for heating the inner wall of the material cylinder 6, which can prevent the molten material injected into the material cylinder 6 from solidifying. The lower two sides of the material cylinder 6 are symmetrically fixedly connected with support frames 12, and the lower end of the support frame 12 is fixedly connected to the top of the upper mold base body 3. The top of the material cylinder 6 is fixed with a cylinder cover 7 by bolts 11. A motor 8 is fixedly installed on the top of the cylinder cover 7. The output end of the motor 8 passes through the cylinder cover 7 and is coaxially fixedly connected to a stirring shaft 9. Stirring crossbars 9 are arranged at equal intervals along the axial direction on the peripheral wall of the stirring shaft 9. 1. Three stirring crossbars 91 are arranged in a circular array on the side wall of the stirring shaft 9 of each layer. Bubble-piercing spikes 911 are evenly spaced along the axial direction of the stirring crossbars 91 on the outer wall of each stirring crossbar 91. A defoaming frame 92 is arranged between adjacent upper and lower stirring crossbars 91. Defoaming threads 921 are arranged on the inner side of the defoaming frame 92, and several defoaming threads 921 are arranged side-by-side at equal intervals. A filter screen 10 is placed in the material cylinder 6 below the stirring shaft 9. A feed branch pipe 71 is installed through the cylinder cover 7 on one side of the motor 8, and a second exhaust branch pipe 72 is installed through the cylinder cover 7 on the other side of the motor 8. The second exhaust branch pipe 72 is used to vent the injection molding material inside the material cylinder 6. The air discharged from the bubbles is discharged. The electrical components in the device are all controlled by an external controller, which will not be described in detail here. The drive motor 8 drives the stirring shaft 9 and the stirring crossbar 91 to rotate, which can drive the bubble-piercing spikes 911 and the defoaming threads 921 to rotate around the stirring shaft 9. The bubble-piercing spikes 911 and the defoaming threads 921 can pierce and cut away the bubbles in the molten material in the barrel 6. The filter screen 10 can filter the bubbles in the molten material, further removing the bubbles. This can effectively prevent bubbles from entering the mold cavity between the lower mold base body 2 and the upper mold base body 3, thereby improving the molding quality of the hot runner molding die.

[0022] The upper part of the material cylinder 6 has symmetrical ear seats 62 on both sides, and the cylinder cover 7 has symmetrical connecting ears 73 on both sides. The lower end of the bolt 11 passes through the connecting ear 73 and is screwed into the threaded hole at the top of the ear seat 62. The bottom of the inner side of the material cylinder 6 has a placement groove 61, and the filter screen 10 is placed in the placement groove 61. By unscrewing the bolt 11, the cylinder cover 7 can be moved upward to remove the stirring shaft 9, stirring crossbar 91 and filter screen 10 from the inside of the material cylinder 6, which makes it easier for personnel to clean the inner wall of the material cylinder 6 and its internal defoaming structure, resulting in better performance.

[0023] Working principle: During use, a certain amount of molten material is injected into the preheated cylinder 6 through the feed branch pipe 71, and the drive motor 8 drives the stirring shaft 9 to rotate. The rotation of the stirring shaft 9 drives the stirring crossbar 91 and the bubble-piercing spikes 911 to rotate. The rotation of the stirring crossbar 91 drives the defoaming frame 92 and the defoaming wire 921 to rotate together. The bubble-piercing spikes 911 and the defoaming wire 921 can pierce and cut away the bubbles in the molten material. After one defoaming, the molten material is introduced into the mold cavity between the lower mold base body 2 and the upper mold base body 3 through the hot runner branch pipe 32. During the process, the molten material can be filtered through the filter screen 10 to achieve secondary defoaming of the molten material, effectively preventing air bubbles from being trapped in the material entering the mold cavity. The air in the air bubbles can be discharged from the exhaust branch pipe 72, and the air in the mold cavity can be discharged from the exhaust branch pipe 33, so that the molten material fills the entire mold cavity. When it is necessary to clean the defoaming structure inside the barrel 6 and the inner wall of the barrel 6, the bolt 11 can be unscrewed, the barrel cover 7 can be opened, and the stirring shaft 9 and the filter screen 10 can be removed from the inside of the barrel 6 to clean the inner wall of the barrel 6 and the defoaming structure.

[0024] The text shows and describes the basic principles, main features and advantages of this utility model. The standard parts used in this utility model can all be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part can all adopt conventional methods such as bolts, rivets and welding that are mature in the prior art. The machinery, parts and equipment can all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. This part will not be described in detail in the text.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.

Claims

1. A hot runner anti-bubble molding die, comprising a base (1), characterized in that: The base (1) is fixedly connected to the top of the lower mold base body (2), and the upper mold base body (3) is provided above the lower mold base body (2). Connecting support plates (31) are symmetrically arranged on both sides of the upper mold base body (3). Electric push rods (4) are symmetrically fixedly installed on the top of the base (1) on both sides of the lower mold base body (2). The upper end of the electric push rod (4) is fixedly connected to the connecting support plate (31). A hot runner branch pipe (32) and an exhaust branch pipe (33) are fixedly installed on the top of the upper mold base body (3). A material cylinder (6) is fixedly connected to the upper end of the hot runner branch pipe (32). A cylinder cover (7) is fixedly fixed to the top of the material cylinder (6) by bolts (11). A motor (8) is fixedly installed on the top of the cylinder cover (7). The output end of the motor (8) passes through the cylinder cover (7) and is coaxially fixedly connected to the stirring shaft (9). The stirring shaft (9) has stirring crossbars (91) arranged at equal intervals along the axial direction on the peripheral side wall. The stirring crossbars (91) have bubble-piercing spikes (911) arranged at equal intervals along the axial direction on the outer wall. A defoaming frame (92) is arranged between two adjacent upper and lower stirring crossbars (91). A defoaming thread (921) is arranged on the inner side of the defoaming frame (92). A filter screen (10) is placed in the material cylinder (6) below the stirring shaft (9). A feed branch pipe (71) is arranged through the cylinder cover (7) on one side of the motor (8). An exhaust branch pipe (72) is arranged through the cylinder cover (7) on the other side of the motor (8).

2. The hot runner anti-bubble molding die according to claim 1, characterized in that, The upper part of the material cylinder (6) is symmetrically provided with ear seats (62) on both sides, and the cylinder cover (7) is symmetrically provided with connecting ears (73) on both sides.

3. The hot runner anti-bubble molding die according to claim 2, characterized in that, The lower end of the bolt (11) passes through the connecting lug (73) and is screwed into the threaded hole at the top of the lug seat (62).

4. The hot runner anti-bubble molding die according to claim 1, characterized in that, The bottom of the inner side of the material cylinder (6) is provided with a placement groove (61), and the filter screen (10) is placed in the placement groove (61).

5. A hot runner anti-bubble molding die according to claim 1, characterized in that, Three stirring crossbars (91) are arranged in a ring array on the side wall of the stirring shaft (9) of each layer. Several defoaming wires (921) are arranged side by side at equal intervals inside the defoaming frame (92). Support frames (12) are symmetrically fixedly connected to the two sides of the lower part of the material cylinder (6), and the lower end of the support frame (12) is fixedly connected to the top of the upper mold base body (3).

6. A hot runner anti-bubble molding die according to claim 1, characterized in that, The upper end of the hot runner branch pipe (32) is connected to the inside of the barrel (6). The inside of the barrel (6) is equipped with a heating coil for heating the inner wall of the barrel (6). A telescopic rod (5) is fixedly installed between the base (1) on the front and rear sides of the electric push rod (4) and the connecting support plate (31).

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