Injection flow channel blocking mechanism, mold and injection molding method

Abstract

The application relates to an injection flow channel plugging mechanism, a mold and an injection method, wherein the injection flow channel plugging mechanism comprises a first female mold plate, the first female mold plate has an injection space, a flow channel assembly, the flow channel assembly has an injection flow channel communicating with the injection space, the flow channel assembly comprises a plugging block, a driving assembly, the driving assembly is connected with the plugging block, and the plugging block has a plugging state of plugging the injection flow channel and a communication state of communicating the injection flow channel. The technical scheme of the application effectively solves the problem that the efficiency is reduced due to the material vacancy of the mold in the prior art during injection.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection molding, in particular to an injection molding flow channel plugging mechanism, a mold and an injection molding method. BACKGROUND

[0002] The precise automatic material pulling plastic mold has a plurality of process technologies in the front section, and each process will produce defective products, resulting in a large number of NG materials in the same tray of materials during automatic material pulling injection molding. If there is 1 PCS NG material (one material or one hole material) in the mold monitor trigger, the machine alarm stops. The operator needs to manually scrap the entire mold product, and if the mold has 8 holes, 1 PCS NG material will cause the other 7 PCS OK materials to be pulled off and scrapped, which is equivalent to expanding the defective rate by 8 times, causing excessive waste of materials and increasing costs. At the same time, the machine stops, and the operator manually operates, resulting in a decrease in efficiency. SUMMARY

[0003] The present application provides an injection molding flow channel plugging mechanism, a mold and an injection molding method to solve the problem of efficiency reduction caused by material gaps during injection molding of the mold in the prior art.

[0004] According to the injection molding flow channel plugging mechanism provided by the present application, the first mold plate has an injection molding space; the flow channel assembly has an injection molding flow channel communicating with the injection molding space, and the flow channel assembly includes a plugging block; the driving assembly is connected with the plugging block, and the plugging block has a plugging state of plugging the injection molding flow channel and a communication state of communicating the injection molding flow channel.

[0005] Further, the flow channel assembly includes a flow channel plate and a flow channel cover plate, the flow channel plate is located on the side of the injection molding space away from the to-be-injected part, the flow channel cover plate is arranged on the side of the flow channel plate away from the to-be-injected part, and the plugging block is movably arranged between the flow channel plate and the flow channel cover plate.

[0006] Further, the injection molding flow channel includes a first flow channel section penetrating through the flow channel plate, a second flow channel section penetrating through the plugging block, and a third flow channel section penetrating through the flow channel cover plate, and when the plugging block is in the plugging state, the second flow channel section communicates the first flow channel section and the third flow channel section.

[0007] Further, the flow channel plate includes a first plate section, a second plate section and a third plate section in the thickness direction, the first plate section is installed in the injection molding space, the plane of the first plate section away from the to-be-injected part is flush with the surface of the first mold plate, the first flow channel section is located on the first plate section, the second plate section is arranged on the side of the first flow channel section away from the driving assembly, the third plate section is located on the side of the second plate section away from the driving assembly, the flow channel cover plate is arranged on the surface of the second plate section and located on the side of the driving assembly, and the plugging block is at least partially located between the first plate section and the flow channel cover plate.

[0008] Further, the blocking block comprises an integral plate body and a connecting block, the connecting block is connected with the driving assembly, the second flow channel section is located on the plate body, and the connecting block is higher than the plate body on the side away from the flow channel cover plate.

[0009] Further, the injection flow channel blocking mechanism further comprises a second mold plate, and the second mold plate is located on the side of the flow channel assembly away from the first mold plate.

[0010] Further, the injection space is multiple, and the driving assembly and the flow channel assembly are multiple in one-to-one correspondence with the injection space.

[0011] Further, the injection flow channel blocking mechanism further comprises an injection pipeline, the injection pipeline comprises an inlet and multiple outlets, the inlet is arranged on the side of the second mold plate away from the first mold plate, and the multiple outlets are arranged in one-to-one correspondence with the flow channel assembly.

[0012] Further, the driving assembly comprises a cylinder structure and a connecting rod, the first end of the connecting rod is connected with the cylinder structure, and the second end of the connecting rod is connected with the blocking block.

[0013] According to another aspect of the present application, a mold is also provided, and the mold comprises the injection flow channel blocking mechanism.

[0014] According to another aspect of the present application, an injection method is also provided, and the injection method adopts the mold, and the injection method comprises the following steps: detecting a to-be-injected part; if the to-be-injected part is located at a normal position, performing injection; if the to-be-injected part is not detected, driving the blocking block to be in a blocking state by the driving assembly; and performing injection.

[0015] By using the technical solution of the present application, the to-be-injected part is arranged in the injection space, the to-be-injected part in the injection space is detected, when the to-be-injected part is detected to be located in the injection space and has an injection condition, the injection flow channel of the flow channel assembly is in a connected state, and injection is performed; when the to-be-injected part in the injection space is detected to not have an injection condition, the injection flow channel is in a blocking state. In this way, the stoppage caused by the to-be-injected part not being in a predetermined position is avoided. The technical solution of the present application effectively solves the problem of efficiency reduction caused by the vacancy of material during injection of the mold in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, those skilled in the art can obtain other drawings according to these drawings without any creative effort.

[0018] Figure 1 A perspective structural schematic view of an embodiment of the injection flow channel blocking mechanism of the present application is shown.

[0019] Figure 2 A perspective structural schematic view of an embodiment of the injection flow channel blocking mechanism of the present application is shown. Figure 1

[0020] Figure 3 A perspective structural schematic view of an embodiment of the injection flow channel blocking mechanism of the present application is shown. Figure 1

[0021] Figure 4 A sectional view schematic view of an embodiment of the injection flow channel blocking mechanism of the present application is shown. Figure 1

[0022] Figure 5 A partial enlarged schematic view of an embodiment of the injection flow channel blocking mechanism of the present application is shown. Figure 4

[0023] Figure 6 A sectional view schematic view of an embodiment of the injection flow channel blocking mechanism of the present application is shown. Figure 1

[0024] Figure 7 A partial enlarged schematic view of an embodiment of the injection flow channel blocking mechanism of the present application is shown. Figure 6

[0025] Among the above drawings, the following reference signs are included:

[0026] 10, first female mold plate; 20, flow channel assembly; 21, blocking block; 211, second flow channel section; 22, flow channel plate; 221, first flow channel section; 23, flow channel cover plate; 231, third flow channel section; 30, driving assembly; 31, cylinder structure; 32, connecting rod; 40, second female mold plate; 50, injection pipeline. DETAILED DESCRIPTION

[0027] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] ​​​​​​It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0029] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways, rotated 90 degrees, or in other orientations, and the spatial relative descriptions used herein will be interpreted accordingly.

[0030] like Figures 1 to 7 As shown, the injection molding runner sealing mechanism of this embodiment includes: a first mother mold 10, a runner assembly 20, and a drive assembly 30. The first mother mold 10 has an injection space. The runner assembly 20 has an injection runner communicating with the injection space, and the runner assembly 20 includes a sealing block 21. The drive assembly 30 is connected to the sealing block 21, and the sealing block 21 has a sealing state that blocks the injection runner and a communicating state that communicates with the injection runner.

[0031] Applying the technical solution of this embodiment, the part to be molded is placed within the injection space. The part to be molded within the injection space is detected. When the part to be molded is detected to be in the injection space and the injection conditions are met, the injection flow channel of the flow channel assembly 20 is in a connected state, and injection is performed. When the injection conditions are not met, for example, when the part to be molded is detected within the injection space, the injection flow channel is blocked. This avoids downtime caused by the part to be molded not being in the predetermined position. The technical solution of this embodiment effectively solves the problem of reduced efficiency caused by material gaps during injection molding in existing technologies. The setting of the blocking block 21 also reduces material waste.

[0032] It should be noted that the injection flow channel blocking mechanism further comprises a detection assembly. The detection assembly comprises a detector arranged corresponding to the injection space, for detecting whether the to-be-injected part is located in the injection space. The detection assembly mainly consists of a controller, an electronic valve, an optical fiber amplifier and an induction optical fiber (detector). The main function is to use multiple induction optical fibers to set the induction range value of the incoming materials through the principle of light reflection. The induction optical fiber judges whether the material is NG according to the induction value (because the previous station has AOI full inspection, the NG material has been cut. This section only needs to sense whether there is material or not. Sensing that there is material represents OK, and sensing that there is no material represents NG). The induction optical fiber automatically senses that the previous section of the material has NG material, records the position of the NG material, and after receiving the signal through the optical fiber amplifier, the signal is returned to the controller. When the cavity enters the mold cavity, the controller sends a signal to the electronic valve to provide a signal for the cylinder structure to act. The main function of the driving assembly 30 is to push the blocking block 21 to block the injection flow channel and prevent plastic from flowing into the mold cavity (injection space). The injection flow channel blocking mechanism of the embodiment does not occupy the mold layout, requires small space, has simple structure and reliable action.

[0033] As shown in Figure 2 , Figure 3 and Figure 4 , in the technical solution of the embodiment, the flow channel assembly 20 comprises a flow channel plate 22 and a flow channel cover plate 23. The flow channel plate 22 is located on the side of the injection space away from the to-be-injected part. The flow channel cover plate 23 is arranged on the side of the flow channel plate 22 away from the to-be-injected part. The blocking block 21 is movably arranged between the flow channel plate 22 and the flow channel cover plate 23. The above structure is compact and convenient to operate. By moving the blocking block 21 between the flow channel plate 22 and the flow channel cover plate 23, the communication and blocking of the injection flow channel can be realized. When the detection assembly detects that the to-be-injected part is not located at the predetermined position, the blocking block 21 blocks.

[0034] As shown in Figure 2 and Figure 3 , in the technical solution of the embodiment, the injection flow channel comprises a first flow channel section 221 penetrating through the flow channel plate 22, a second flow channel section 211 penetrating through the blocking block 21, and a third flow channel section 231 penetrating through the flow channel cover plate 23. When the blocking block 21 is in the blocking state, the second flow channel section 211 communicates the first flow channel section 221 and the third flow channel section 231. The above structure has low processing cost and is convenient to operate. By staggering the second flow channel section 211 and the first flow channel section 221 and the third flow channel section 231, the blocking can be realized. It should be noted that in the technical solution of the embodiment, the inner diameter of the injection flow channel decreases in the direction from the first flow channel section 221 to the third flow channel section 231. The center axis of the first flow channel section 221, the center axis of the second flow channel section 211 and the center axis of the third flow channel section 231 are located on the same axis.

[0035] As shown in Figure 4As shown in the technical solution of this embodiment, the runner plate 22 includes a first plate segment, a second plate segment, and a third plate segment in the thickness direction. The first plate segment is installed in the injection molding space, and the plane of the first plate segment away from the part to be injected is flush with the surface of the first master mold 10. The first runner segment 221 is located on the first plate segment. The second plate segment is located on the side of the first runner segment 221 away from the drive assembly 30. The third plate segment is located on the side of the second plate segment away from the drive assembly 30. The runner cover plate 23 is disposed on the surface of the second plate segment and located on one side of the drive assembly 30. The sealing block 21 is at least partially located between the first plate segment and the runner cover plate 23. The above structure has a good support effect, the movement of the sealing block 21 is relatively smooth, and the sealing effect between the sealing block 21 and the runner plate 22 and the runner cover plate 23 is good. The sealing block 21, the runner plate 22, and the runner cover plate 23 have high processing precision, and sealing can be achieved through the planar fit of the above three components. A sliding groove is provided on the surface of the first plate segment facing the sealing block 21. The height of the sliding groove from the surface of the second plate segment is the same as the thickness of the plate body, which is conducive to achieving sealing and fitting accuracy.

[0036] like Figure 2 and Figure 3 As shown, in this embodiment, the blocking block 21 includes an integrally formed plate and a connecting block. The connecting block is connected to the drive assembly 30. The second flow channel section 211 is located on the plate. On the side away from the flow channel plate 22, the connecting block is higher than the plate. When the blocking block 21 is in the blocking state, the connecting block is in contact with the flow channel cover plate 23. The above structure of the blocking block 21 can both connect with the connecting rod 32 and limit the movement of the blocking block 21. The connecting rod 32 and the connecting block are detachably connected. Specifically, the upper surface of the connecting block has a groove, and the side of the groove away from the cylinder structure 31 has a mounting hole. There is a neck between the first end and the second end of the connecting rod, and the second end of the connecting rod is located in the mounting hole. It should be noted that when the sealing block 21 is in the sealing state, the plate body and the side of the second plate segment near the drive assembly 30 are in contact to form a limit. When the sealing block 21 is in the communicating state, the gap between the connecting block and the flow channel cover plate 23 is 3mm, so the moving distance of the sealing block 21 is 3mm. The fluid channel has a frustum-shaped structure, and the diameter decreases from the direction away from the part to be injected to the direction of the part to be injected.

[0037] like Figure 1 As shown, in this embodiment, the injection molding runner sealing mechanism further includes a second mother template 40, which is located on the side of the runner assembly 20 away from the first mother template 10. The second mother template 40 effectively protects the runner assembly 20, the drive assembly 30, and the injection pipe 50, making them less susceptible to damage and misalignment. The surface of the third plate segment away from the second plate segment is flush with the surface of the runner cover plate 23 away from the second plate segment.

[0038] As shown in Figure 2 and Figure 3 shown, in the technical scheme of the embodiment, the injection molding space is multiple, and the driving assembly 30 is multiple corresponding to the flow channel assembly 20. The above structure improves the injection molding efficiency. Specifically, in the technical scheme of the embodiment, the injection molding space is eight, and the driving assembly 30 and the flow channel assembly 20 are also corresponding eight.

[0039] As shown in Figure 2 and Figure 3 shown, in the technical scheme of the embodiment, the injection molding flow channel sealing mechanism further comprises an injection molding pipeline 50, the injection molding pipeline 50 comprises an inlet and multiple outlets, the inlet is arranged on the side of the second mold plate 40 away from the first mold plate 10, and the multiple outlets are arranged corresponding to the flow channel assembly 20. The arrangement of the injection molding pipeline 50 reduces the processing cost, so that the injection molding channel does not need to be arranged on the second mold plate. It should be noted that the multiple outlets are arranged in parallel, so that the pressure of each outlet is uniform, and the influence between them is small.

[0040] As shown in Figure 2 and Figure 3 shown, in the technical scheme of the embodiment, the driving assembly 30 comprises a cylinder structure 31 and a connecting rod 32, the first end of the connecting rod 32 is connected with the cylinder structure 31, and the second end of the connecting rod 32 is connected with the sealing block 21. The above structure has low processing cost and is convenient to operate.

[0041] The application also provides a mold, which comprises the injection molding flow channel sealing mechanism.

[0042] The application also provides an injection molding method, which adopts the mold, and the injection molding method comprises the following steps: detecting the to-be-injection-molded part by the detection assembly; if the to-be-injection-molded part is located at a normal position, injection molding is performed; if the to-be-injection-molded part is not detected, the driving assembly 30 drives the sealing block 21 to be in a sealing state; and injection molding is performed. The above injection molding method can improve the injection molding efficiency. It should be noted that when injection molding is multi-point, one or more are sealed, and the rest that meet the injection molding requirements can normally perform injection molding. The material of the to-be-injection-molded part in the application can be plastic material, metal material, a mixture of metal material and plastic material, and plastic material, etc. The above material of the to-be-injection-molded part is only listed but not exhaustive.

[0043] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting, as the scope of the exemplary embodiments of this application is limited only by the appended claims. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0044] It should be noted that the terms "first", "second", and the like, herein do not necessarily have an ordinal meaning. Rather, such terms are used to distinguish between similar objects or actions. It should also be noted that the terms "coupled" and "connected" along with their derivatives, as used herein, can be used in

[0045] The only limitation of the application is set forth in the accompanying claims and the application encompasses modifications and variations of the preferred embodiments thereof as come within the scope of the appended claims. It is intended that the specification and figures be considered as illustrative only and not restrictive in character. It is therefore wished to be protected in the full scope by the appended claims and their equivalents.

Claims

1. A gate pinching mechanism for injection molding, comprising: The injection molding flow channel blocking mechanism comprises: a first master mold plate (10) having an injection molding space; a flow channel assembly (20) having an injection molding flow channel communicating with the injection molding space, the flow channel assembly (20) comprising a blocking block (21), the flow channel assembly (20) comprising a flow channel plate (22) and a flow channel cover plate (23), the flow channel plate (22) being located on a side of the injection molding space away from a to-be-injected part, the flow channel cover plate (23) being arranged on a side of the flow channel plate (22) away from the to-be-injected part, the blocking block (21) being movably arranged between the flow channel plate (22) and the flow channel cover plate (23), the injection molding flow channel comprising a first flow channel section (221) penetrating through the flow channel plate (22), a second flow channel section (211) penetrating through the blocking block (21), and a third flow channel section (231) penetrating through the flow channel cover plate (23), the second flow channel section (211) communicating the first flow channel section (221) and the third flow channel section (231) when the blocking block (21) is in a communicating state; a driving assembly (30) connected with the blocking block (21), the blocking block (21) having a blocking state of blocking the injection molding flow channel and a communicating state of communicating the injection molding flow channel, the blocking block (21) comprising an integrally formed plate body and a connecting block, the connecting block being connected with the driving assembly (30), the second flow channel section (211) being located on the plate body, the connecting block being higher than the plate body on a side away from the flow channel plate (22), the connecting block being in abutment with the flow channel cover plate (23) when the blocking block (21) is in the blocking state; the flow channel plate (22) comprising a first plate section, a second plate section and a third plate section in a thickness direction, the first plate section being installed in the injection molding space, a plane of the first plate section away from the to-be-injected part being flush with a surface of the first master mold plate (10), the first flow channel section (221) being located on the first plate section, the second plate section being arranged on a side of the first flow channel section (221) away from the driving assembly (30), the third plate section being located on a side of the second plate section away from the driving assembly (30), the flow channel cover plate (23) being arranged on a surface of the second plate section and located on a side of the driving assembly (30), the blocking block (21) being at least partially located between the first plate section and the flow channel cover plate (23).

2. The injection molding gate pinching mechanism of claim 1, wherein, The injection molding flow channel blocking mechanism further comprises a second master mold plate (40) located on a side of the flow channel assembly (20) away from the first master mold plate (10).

3. The injection molding gate pinching mechanism of claim 2, wherein, The injection molding space is multiple, and the driving assembly (30) and the flow channel assembly (20) are multiple in one-to-one correspondence with the injection molding space.

4. The injection molding gate pinching mechanism of claim 3, wherein, The injection flow channel blocking mechanism further comprises an injection pipe (50) comprising an inlet and a plurality of outlets, the inlet being arranged on the second mold plate (40) away from the first mold plate (10), and the plurality of outlets being arranged one-to-one with the flow channel assemblies (20).

5. The injection molding gate pinching mechanism of claim 1 wherein, The driving assembly (30) comprises a cylinder structure (31) and a connecting rod (32), the first end of the connecting rod (32) being connected with the cylinder structure (31), and the second end of the connecting rod (32) being connected with the blocking block (21).

6. A mold characterized by, The mold comprises an injection flow channel blocking mechanism, and the injection flow channel blocking mechanism is the injection flow channel blocking mechanism according to any one of claims 1 to 5.

7. A method of injection molding, characterized in that, The injection method adopts the mold according to claim 6, and the injection method comprises the following steps: detecting a to-be-injected part; if the to-be-injected part is in a normal position, performing injection; if the to-be-injected part is not detected, the driving assembly (30) drives the blocking block (21) to be in a blocking state; performing injection.

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