Automatic injection mold with secondary ejection combined with inclined ejection and submerged glue feeding

Abstract

The utility model relates to the technical fields of injection mold, disclose automatic injection mold of twice ejection combined with oblique ejection submergence glue inlet, including top cap board, inner mould inner insert, upper die holder, lower die holder, twice ejection mechanism, oblique ejection mechanism, top cap board abuts on the top of inner mould inner insert, form has the submergence glue inlet for injecting liquid, submergence glue inlet runs through oblique ejection mechanism and is linked with forming cavity, once ejection subassembly is connected with submergence glue inlet, twice ejection subassembly and oblique ejection mechanism linkage cooperation, through setting twice ejection mechanism, once ejection subassembly ejection forming glue way, twice ejection subassembly drive oblique ejection mechanism complete reverse buckle demolding and ejection plastic piece, realized the step -by -step ejection, avoided the deformation of plastic piece caused by single ejection, promoted the demolding stability, submergence glue inlet runs through oblique ejection mechanism and is linked with forming cavity, cooperate the design of automatic cutting off sprue when parting, do not need manual intervention cutting off sprue, reduce the subsequent processing procedure, improve the automation production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of injection molds, and more specifically, to an automated injection mold with a combination of secondary ejection and inclined ejector for submersible injection. Background Technology

[0002] In the field of injection mold technology, traditional molds often face numerous problems when molding plastic parts with deep cavities or undercut structures. Using a single ejection method can easily lead to deformation of the plastic part, while multiple ejection operations often require manual intervention, resulting in low production efficiency and difficulty in achieving automated production.

[0003] While angled ejector mechanisms can solve some of the undercut demolding problems, their coordination with the ejection mechanism is insufficient, which can easily lead to unstable demolding. In addition, the gate location of conventional injection methods is mostly located on the outer surface of the plastic part, which can easily leave gate marks, affecting the appearance quality of the product and increasing subsequent processing steps. Utility Model Content

[0004] The purpose of this invention is to provide an automated injection mold with a combination of secondary ejection and inclined ejector for submersible injection, which aims to solve the problems in the prior art where traditional mold ejection easily leads to deformation of plastic parts and requires manual intervention for multiple ejections.

[0005] This utility model is an automated injection mold that combines secondary ejection with inclined ejector and submersible injection. It includes a top cover plate, an inner mold insert, an upper mold base, a lower mold base, a secondary ejection mechanism, and an inclined ejector mechanism. The upper mold base, the lower mold base, and the inclined ejector mechanism together form a molding cavity. The top cover plate abuts against the top of the inner mold insert to form a submersible injection channel for injection. The submersible injection channel passes through the inclined ejector mechanism and communicates with the molding cavity.

[0006] The secondary ejection mechanism includes a primary ejection assembly and a secondary ejection assembly connected in sequence. The primary ejection assembly is connected to the submersible inlet channel and is used to eject the molding channel. The secondary ejection assembly is linked with the angled ejector mechanism and is used to drive the angled ejector mechanism to complete the undercut demolding and eject the plastic part. The submersible inlet channel automatically cuts off the gate during parting.

[0007] Furthermore, the inclined ejector mechanism includes an inclined ejector block and an inner mold outer insert; the inner mold outer insert and the inner mold inner insert are respectively fixed on a fixed mold base, the inner mold outer insert has a guide groove, the inclined ejector block slides with the guide groove, and the bottom of the inclined ejector block is connected to the secondary ejection assembly; the upper mold base, the lower mold base, and the inclined ejector block together form the molding cavity.

[0008] Furthermore, the inclined top block is provided with a conical guide groove on the side near the molding cavity that matches the undercut of the plastic part.

[0009] Furthermore, the submersible injection channel includes a main channel, on which multiple branch channels are provided. One end of each branch channel passes through the inclined top block and forms a submersible injection port that communicates with the molding cavity. The submersible injection port is located on a non-surface surface of the plastic part.

[0010] Furthermore, the submersible glue inlet is arranged at an angle, and the submersible glue inlet is inclined to enter the parting surface.

[0011] Furthermore, the runners are located in the top of the inner mold insert and the inclined ejector block, respectively, and the bottom of the runners is provided with a vertical runner for connecting to the primary ejection assembly. The vertical runners are located in the inner mold insert.

[0012] Furthermore, the primary ejection assembly includes a primary sub-top plate and a plurality of primary ejector pins. One end of the primary ejector pin is fixed to the primary sub-top plate, and the other end of the primary ejector pin passes through the secondary ejection assembly and the inner mold insert and extends to the vertical flow channel in the runner.

[0013] The primary ejection assembly also includes a primary top plate return spring and a primary top plate return needle. The primary top plate return spring is sleeved on the outside of the primary top plate return needle, and its two ends abut against the primary auxiliary top plate and the secondary ejection assembly, respectively.

[0014] Furthermore, the secondary ejection assembly includes a secondary main ejector plate and a plurality of secondary ejector pins. One end of each secondary ejector pin is fixed to the secondary main ejector plate, and the other end of each secondary ejector pin passes through the fixed mold base and abuts against the bottom of the inclined ejector block.

[0015] The secondary ejection assembly also includes a secondary ejector plate return spring and a secondary ejector plate return pin. The secondary ejector plate return spring is sleeved on the outside of the secondary ejector plate return pin, and its two ends abut against the secondary main ejector plate and the fixed mold base, respectively.

[0016] Furthermore, the secondary main top plate is also provided with an inclined ejector rod, one end of which abuts against the top of the secondary main top plate, and the other end of which passes through the lower mold base and is inserted into the molding cavity.

[0017] Furthermore, an inclined guide block is sleeved on the inclined push rod, the inclined guide block is installed in the fixed mold base, and a guide groove for guiding the movement direction of the inclined push rod is opened in the inclined guide block.

[0018] Compared with existing technologies, the automated injection mold with secondary ejection combined with inclined ejector and submersible injection provided by this utility model achieves step-by-step ejection by setting a secondary ejection mechanism. The primary ejection component ejects the molding channel, and the secondary ejection component drives the inclined ejector mechanism to complete the inverted demolding and eject the plastic part. This avoids the deformation of the plastic part caused by single ejection and improves demolding stability. The submersible injection channel runs through the inclined ejector mechanism and connects to the molding cavity. With the design of automatically cutting off the gate during parting, there is no need for manual intervention to cut off the gate, reducing subsequent processing steps and improving the efficiency of automated production. The overall structure takes into account both demolding reliability and automated production requirements, while the submersible injection reduces the impact on the appearance of the plastic part. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the automated injection mold with secondary ejection combined with inclined ejector and submersible injection provided by this utility model;

[0020] Figure 2 This is a front view sectional view of the automated injection mold with secondary ejection combined with inclined ejector and submersible injection provided by this utility model.

[0021] Figure 3 This is a side view sectional view of the automated injection mold with secondary ejection combined with inclined ejector and submersible injection provided by this utility model.

[0022] Figure 4 This is a partial top-view three-dimensional schematic diagram of the automated injection mold with secondary ejection combined with inclined ejector and underwater injection provided by this utility model;

[0023] Figure 5 This is a partial bottom-view three-dimensional schematic diagram of the automated injection mold with secondary ejection combined with inclined ejector and underwater injection provided by this utility model;

[0024] Figure 6 This is a three-dimensional schematic diagram of the primary ejection assembly and the submersible inlet channel provided by this utility model.

[0025] In the figure: Top cover plate 10, fixed mold base 20, inner mold insert 30, inner mold outer insert 40, upper mold base 50, lower mold base 60, secondary ejection mechanism 70, inclined ejector block 80, submersible sprue 90, molding cavity 110, inclined ejector guide block 21, guide groove 22, guide groove 41, primary ejection assembly 71, secondary ejection assembly 72, primary auxiliary ejector plate 711, primary ejector pin 712, primary ejector plate return spring 713, primary ejector plate return pin 714, secondary main ejector plate 721, secondary ejector pin 722, secondary ejector plate return spring 723, secondary ejector plate return pin 724, inclined ejector rod 725, conical guide groove 81, main runner 91, branch runner 92, submersible sprue 93, vertical runner 94. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0028] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Reference Figure 1-6 The image shown is a preferred embodiment of the present invention.

[0030] An automated injection mold with secondary ejection and inclined ejector submersible injection includes a top cover plate 10, an inner mold insert 30, an upper mold base 50, a lower mold base 60, a secondary ejection mechanism 70, and an inclined ejector mechanism. The upper mold base 50, the lower mold base 60, and the inclined ejector mechanism enclose a molding cavity 110. The top cover plate 10 abuts against the top of the inner mold insert 30, forming a submersible injection channel 90 for injection. The submersible injection channel 90 passes through the inclined ejector mechanism and communicates with the molding cavity 110.

[0031] The secondary ejection mechanism 70 includes a primary ejection assembly 71 and a secondary ejection assembly 72 connected in sequence. The primary ejection assembly 71 is connected to the submersible inlet channel 90 and is used to eject the molding channel. The secondary ejection assembly 72 is linked with the angled ejector mechanism and is used to drive the angled ejector mechanism to complete the undercut demolding and eject the plastic part. The submersible inlet channel 90 automatically cuts off the gate during parting.

[0032] The aforementioned automated injection mold with secondary ejection combined with inclined ejector and submersible injection achieves step-by-step ejection by setting a secondary ejection mechanism 70. The primary ejection component 71 ejects the molding channel, and the secondary ejection component 72 drives the inclined ejector mechanism to complete the inverted demolding and eject the plastic part. This avoids deformation of the plastic part caused by single ejection and improves demolding stability. The submersible injection channel 90 passes through the inclined ejector mechanism and connects to the molding cavity 110. With the design of automatically cutting off the gate during parting, there is no need for manual intervention to cut off the gate, reducing subsequent processing steps and improving automated production efficiency. The overall structure takes into account both demolding reliability and automated production requirements, while the submersible injection reduces the impact on the appearance of the plastic part.

[0033] In this embodiment, the inclined ejector mechanism includes an inclined ejector block 80 and an inner mold outer insert 40; the inner mold outer insert 40 and the inner mold inner insert 30 are respectively fixed on the fixed mold base 20, and a guide groove 41 is provided in the inner mold outer insert 40. The inclined ejector block 80 is slidably engaged with the guide groove 41, and the bottom of the inclined ejector block 80 is connected to the secondary ejection assembly 72; the upper mold base 50, the lower mold base 60 and the inclined ejector block 80 together form a molding cavity 110.

[0034] The inner mold outer insert 40 and the inner mold inner insert 30 are fixed to the fixed mold base 20, ensuring the installation stability of the core components of the mold and improving the overall structural rigidity; the sliding fit between the guide groove 41 and the inclined ejector block 80 provides precise guidance for the movement of the inclined ejector block 80, preventing the inclined ejector block 80 from shifting during demolding, and ensuring the sealing of the molding cavity 110 and the demolding accuracy; the bottom of the inclined ejector block 80 is directly connected to the secondary ejection assembly 72, which can efficiently transmit the driving force of the secondary ejection to the inclined ejector block 80, ensuring the response speed and stability of the undercut demolding action.

[0035] In this embodiment, the inclined top block 80 is provided with a conical guide groove 81 on the side near the molding cavity 110, which matches the undercut of the plastic part.

[0036] The conical guide groove 81 is precisely matched with the undercut of the plastic part. During the demolding process, the conical surface can gradually detach from the undercut through the guiding effect of the inclined surface, avoiding damage to the undercut part of the plastic part caused by direct hard demolding and protecting the structural integrity of the plastic part. At the same time, the contact of the conical surface reduces the frictional resistance between the inclined ejector block 80 and the plastic part, making the demolding process smoother and reducing the risk of plastic part deformation. It is especially suitable for molding plastic parts with complex undercut structures.

[0037] In this embodiment, the submersible inlet channel 90 includes a main channel 91, and a plurality of branch channels 92 are provided on the main channel 91. One end of the branch channel 92 passes through the inclined top block 80 and forms a submersible inlet 93 that communicates with the molding cavity 110. The submersible inlet 93 is located on the non-appearance surface of the plastic part and is connected to the branch channel 92 at an angle of 45°-60°.

[0038] The main runner 91, in conjunction with multiple branch runners 92, can evenly distribute the molten material to each molding cavity 110, ensuring the consistency of the plastic part quality during multi-cavity molding. The submersible gate 93 is located on a non-exterior surface to avoid leaving gate marks on the exterior surface of the plastic part, improving the appearance quality of the product and reducing subsequent grinding processes. The branch runners 92 are connected to the submersible gate 93 at an angle of 45°-60°. This angle design makes the molten material flow path smooth, reduces flow resistance, and avoids stagnation or pressure loss of molten material at the gate, ensuring filling efficiency and molding quality.

[0039] In this embodiment, the submersible inlet 93 is arranged at an angle and is inclined into the parting surface.

[0040] The submersible gate 93 is inclined into the parting surface. During mold parting, the relative movement of the parting surface can directly cut off the gate, realizing automated gate cutting without the need for an additional gate cutting mechanism, simplifying the mold structure and improving production efficiency. The inclined arrangement makes the connection between the gate and the plastic part more concealed, further reducing the impact on the appearance and performance of the plastic part, while facilitating the smooth filling of the molten material into the depth of the molding cavity 110 along the incline.

[0041] In this embodiment, the flow channels 92 are located in the top of the inner mold insert 30 and the inclined ejector block 80, respectively. The bottom of the flow channels 92 is provided with a vertical flow channel 94 for connecting with the primary ejection assembly 71. The vertical flow channel 94 is located in the inner mold insert 30.

[0042] The runners 92 are distributed on the top of the inner mold insert 30 and the inclined ejector block 80, which can adapt to the split structure of the mold and facilitate the processing and assembly of the mold. The vertical runners 94 provide a precise point of action for the primary ejection component 71, so that the primary ejection component 71 can directly act on the molding channel in the runners 92, ensuring the targeting and effectiveness of the ejection action and avoiding interference to the plastic part during ejection. At the same time, the vertical runners 94 are located in the inner mold insert 30, which improves the stability of the runner structure.

[0043] In this embodiment, the primary ejection assembly 71 includes a primary sub-top plate 711 and a plurality of primary ejector pins 712. One end of the primary ejector pin 712 is fixed to the primary sub-top plate 711, and the other end of the primary ejector pin 712 passes through the secondary ejection assembly 72 and the inner mold insert 30 and extends to the vertical flow channel 94 in the flow channel 92.

[0044] The primary ejection assembly 71 also includes a primary top plate return spring 713 and a primary top plate return needle 714. The primary top plate return spring 713 is sleeved on the outside of the primary top plate return needle 714, and its two ends abut against the primary auxiliary top plate 711 and the secondary ejection assembly 72, respectively.

[0045] The primary ejector pin 712 extends directly to the vertical runner 94, accurately ejecting the molding runner within the sub-runner 92 and ensuring complete separation of the runner from the plastic part. The primary ejector plate return spring 713 and the primary ejector plate return pin 714 work together to drive the primary auxiliary ejector plate 711 and the primary ejector pin 712 to quickly and accurately reset after one ejection action, preparing for the next injection cycle and avoiding poor return that could affect the normal operation of the mold. At the same time, the spring's buffering effect reduces mechanical impact during ejection and return, extending the component's service life.

[0046] In this embodiment, the secondary ejection assembly 72 includes a secondary main ejector plate 721 and a plurality of secondary ejector pins 722. One end of the secondary ejector pin 722 is fixed to the secondary main ejector plate 721, and the other end of the secondary ejector pin 722 passes through the fixed mold base 20 and abuts against the bottom of the inclined ejector block 80. The other end of the primary ejector pin 712 passes through the secondary main ejector plate 721 and the inner mold insert 30 and extends to the vertical flow channel 94 in the flow channel 92.

[0047] The secondary ejection assembly 72 also includes a secondary ejector plate return spring 723 and a secondary ejector plate return needle 724. The secondary ejector plate return spring 723 is sleeved on the outside of the secondary ejector plate return needle 724, and its two ends abut against the secondary main ejector plate 721 and the fixed mold base 20, respectively.

[0048] The secondary ejector pin 722, by abutting against the bottom of the inclined ejector block 80, can efficiently transmit the driving force of the secondary main ejector plate 721 to the inclined ejector block 80, driving the inclined ejector block 80 to complete the undercut demolding and eject the plastic part. The ejection force is uniform, avoiding excessive local force on the plastic part and deformation. The primary ejector pin 712 penetrates the secondary main ejector plate 721, realizing a compact layout of the primary ejection and secondary ejection components 72, saving internal mold space. The secondary ejector plate return spring 723 and return pin ensure that the secondary ejection component 72 accurately resets after completing the action, ensuring that the inclined ejector block 80 returns to the initial position, ensuring the sealing and molding accuracy of the next molding cavity 110.

[0049] In this embodiment, the secondary main top plate 721 is also provided with an inclined push rod 725. One end of the inclined push rod 725 abuts against the top of the secondary main top plate 721, and the other end of the inclined push rod 725 passes through the lower mold base 60 and is inserted into the molding cavity 110.

[0050] The inclined ejector pin 725 can adapt to the complex structure of the plastic part (such as deep cavity, inclined surface, etc.), and assist in ejecting the plastic part from inside the molding cavity 110. It works with the inclined ejector block 80 to form multi-point ejection, improve the ejection balance, and avoid deformation of the plastic part due to single-point force. The inclined ejector pin 725 is directly driven by the secondary main ejector plate 721, with good action synchronization, ensuring accurate ejection timing and further improving demolding reliability.

[0051] In this embodiment, an inclined guide block 21 is sleeved on the inclined push rod 725. The inclined guide block 21 is installed in the fixed mold base 20. A guide groove 22 for guiding the movement direction of the inclined push rod 725 is opened in the inclined guide block 21.

[0052] The guide groove 22 of the inclined ejector guide block 21 provides precise motion guidance for the inclined ejector rod 725, restricting the inclined ejector rod 725 to move only in a preset direction, avoiding the inclined ejector rod 725 from deviating or shaking during the ejection process, and ensuring ejection accuracy; the guide block is installed in the fixed mold base 20, with a stable structure, which can effectively withstand the lateral force when the inclined ejector rod 725 moves, reduce the wear of the inclined ejector rod 725, extend its service life, and at the same time ensure the smoothness of the ejection action.

[0053] The working principle of this utility model is as follows: During operation, the molten material enters the molding cavity 110 through the main channel 91, branch channel 92, and submersible inlet 93 of the submersible inlet channel 90 to complete the molding of the plastic part; during parting, the submersible inlet channel 90 automatically cuts off the gate under the action of the parting surface; subsequently, the primary ejector pin 712 of the primary ejector assembly 71 ejects the molding channel in the branch channel 92, and the primary ejector plate return spring 713 and the primary ejector plate return pin 714 assist the primary ejector assembly 71 in resetting; next, the secondary ejector pin 722 of the secondary ejector assembly 72 drives the inclined ejector block 80 to slide along the guide groove 41, and cooperates with the conical guide groove 81 to complete the undercut demolding. At the same time, the inclined ejector rod 725 assists in ejecting the plastic part under the guidance of the guide groove 22 of the inclined ejector guide block 21, and the secondary ejector plate return spring 723 and the secondary ejector plate return pin 724 assist the secondary ejector assembly 72 in resetting, realizing an automated demolding cycle.

[0054] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automated injection mold with a two-stage ejection system combined with a slanted ejector and underwater injection, characterized in that: It includes a top cover plate, an inner mold insert, an upper mold base, a lower mold base, a secondary ejection mechanism, and an inclined ejection mechanism. The upper mold base, the lower mold base, and the inclined ejection mechanism together form a molding cavity. The top cover plate abuts against the top of the inner mold insert and forms a submersible injection channel for liquid injection. The submersible injection channel passes through the inclined ejection mechanism and communicates with the molding cavity. The secondary ejection mechanism includes a primary ejection assembly and a secondary ejection assembly connected in sequence. The primary ejection assembly is connected to the submersible inlet channel and is used to eject the molding channel. The secondary ejection assembly is linked with the angled ejector mechanism and is used to drive the angled ejector mechanism to complete the undercut demolding and eject the plastic part. The submersible inlet channel automatically cuts off the gate during parting.

2. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 1, characterized in that, The inclined ejector mechanism includes an inclined ejector block and an inner mold outer insert; the inner mold outer insert and the inner mold inner insert are respectively fixed on a fixed mold base, the inner mold outer insert has a guide groove, the inclined ejector block slides with the guide groove, and the bottom of the inclined ejector block is connected to the secondary ejection assembly; the upper mold base, the lower mold base, and the inclined ejector block together form the molding cavity.

3. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 2, characterized in that, The inclined top block has a conical guide groove on the side near the molding cavity that matches the undercut of the plastic part.

4. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 2, characterized in that, The submersible inlet channel includes a main channel with multiple branch channels. One end of each branch channel passes through the inclined top block and forms a submersible inlet that communicates with the molding cavity. The submersible inlet is located on a non-surface surface of the plastic part.

5. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 4, characterized in that, The diving inlet is arranged at an angle and is inclined into the parting surface.

6. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 5, characterized in that, The runners are located at the top of the inner mold insert and the top of the inclined ejector block, respectively. The bottom of the runners is provided with a vertical runner for connecting to the primary ejection assembly. The vertical runner is located in the inner mold insert.

7. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in any one of claims 2 to 6, characterized in that, The primary ejection assembly includes a primary sub-top plate and several primary ejector pins. One end of each primary ejector pin is fixed to the primary sub-top plate, and the other end of each primary ejector pin passes through the secondary ejection assembly and the inner mold insert and extends into the vertical flow channel in the runner. The primary ejection assembly also includes a primary top plate return spring and a primary top plate return needle. The primary top plate return spring is sleeved on the outside of the primary top plate return needle, and its two ends abut against the primary auxiliary top plate and the secondary ejection assembly, respectively.

8. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 7, characterized in that, The secondary ejection assembly includes a secondary main ejector plate and several secondary ejector pins. One end of each secondary ejector pin is fixed to the secondary main ejector plate, and the other end of each secondary ejector pin passes through the fixed mold base and abuts against the bottom of the inclined ejector block. The secondary ejection assembly also includes a secondary ejector plate return spring and a secondary ejector plate return pin. The secondary ejector plate return spring is sleeved on the outside of the secondary ejector plate return pin, and its two ends abut against the secondary main ejector plate and the fixed mold base, respectively.

9. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 8, characterized in that, The secondary main top plate is also provided with inclined ejector rods. One end of the ejector rod abuts against the top of the secondary main top plate, and the other end of the ejector rod passes through the lower mold base and is inserted into the molding cavity.

10. The automated injection mold with secondary ejection combined with inclined ejector and submersible injection as described in claim 9, characterized in that, An inclined guide block is fitted onto the inclined push rod. The inclined guide block is installed in the fixed mold base. A guide groove is provided in the inclined guide block to guide the movement direction of the inclined push rod.

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