Secondary ejection mechanism
By simplifying the design of the secondary ejection mechanism and adopting a combination structure of the lower template and ejector plate, the space and cost issues in the existing technology are solved, and efficient product ejection is achieved.
Patent Information
- Application Number
- CN202423302887.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Existing secondary ejection structures require two sets of ejector plates, which increases the height of the mold base, occupies a large space, has high costs, and requires customization.
A secondary ejection mechanism is adopted, which, through the design of the lower template, upper ejector plate and lower ejector plate, combined with components such as limiting ejection column, guide column and return spring, realizes synchronous and secondary ejection of products, reducing the space occupation and manufacturing cost of the ejection mechanism.
It achieves a secondary ejection effect that is simple in structure, has a good ejection effect, occupies little space, and has low manufacturing cost.
Smart Images
Figure CN223630908U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection mold technical field, concretely is a secondary ejection mechanism with simple structure, good ejection effect, small space occupation and low manufacturing cost. BACKGROUND
[0002] It is known that in the injection molding field, two ejection mechanisms are needed to realize the demolding process of products, after one ejection mechanism ejects, the other ejection mechanism acts to realize demolding, but the prior art secondary ejection structure needs two groups of ejector pins to realize secondary ejection action (each group of ejector pins includes an ejector pin face plate and an ejector pin bottom plate), which has the following two defects:
[0003] 1. Two groups of ejector pins increase the height of the mold frame, which may result in a large injection molding machine tonnage during production, large space occupation and increased production cost.
[0004] 2. Two groups of ejector pins are non-standard mold frames, which need to be customized, increasing the cost of the mold frame. SUMMARY
[0005] The utility model discloses a kind of secondary ejection mechanisms with simple structure, good ejection effect, small space occupation and low manufacturing cost.
[0006] The utility model discloses the technical scheme for solving its technical problem is as follows:
[0007] A secondary ejection mechanism is provided with a lower die plate, and the left and right sides of the lower die plate are connected with lower die seats. The lower die plate between the lower die seats is provided with an upper ejector pin plate and a lower ejector pin plate. The lower end surface of the lower ejector pin plate is provided with a secondary ejection groove. The secondary ejection groove is inserted with a secondary ejector pin plate. The secondary ejector pin plate and the groove bottom of the secondary ejection groove of the lower ejector pin plate are connected through a plug. The upper ejector pin plate and the lower ejector pin plate are provided with corresponding secondary ejection holes. A secondary ejection rod is fixedly connected with the secondary ejector pin plate. The upper end of the secondary ejection rod extends out of the secondary ejection holes of the lower ejector pin plate and the upper ejector pin plate in sequence and is connected with a module.
[0008] The secondary ejector pin plate is connected with a limiting ejection column. The upper ejector pin plate and the lower ejector pin plate are provided with limiting ejection holes matched with the limiting ejection column. The lower end of the limiting ejection column is connected with the secondary ejector pin plate. The upper end of the limiting ejection column passes through the limiting ejection holes of the lower ejector pin plate and the upper ejector pin plate in sequence and extends out of the limiting ejection hole of the upper ejector pin plate.
[0009] The upper end of the limiting ejection column is connected with the lower end surface of the middle die plate. The gap between the upper end of the limiting ejection column and the lower end surface of the middle die plate is the synchronous ejection gap of the upper ejector pin plate and the lower ejector pin plate.
[0010] The upper ejector plate is provided with a guide reset column, the middle mold plate above the guide reset column is provided with a guide reset hole, the lower end of the guide reset column is fixedly connected with the upper ejector plate, the upper end of the guide reset column penetrates the guide reset hole of the middle mold plate, and a reset spring is sleeved on the guide reset column between the upper ejector plate and the middle mold plate.
[0011] The upper ejector plate is provided with a guide reset column, the middle mold plate above the guide reset column is provided with a guide reset hole, the lower end of the guide reset column is fixedly connected with the upper ejector plate, the upper end of the guide reset column penetrates the guide reset hole of the middle mold plate, and a reset spring is sleeved on the guide reset column between the upper ejector plate and the middle mold plate.
[0012] The upper ejector plate is provided with a guide reset column, the middle mold plate above the guide reset column is provided with a guide reset hole, the lower end of the guide reset column is fixedly connected with the upper ejector plate, the upper end of the guide reset column penetrates the guide reset hole of the middle mold plate, and a reset spring is sleeved on the guide reset column between the upper ejector plate and the middle mold plate.
[0013] The upper ejector plate is provided with a guide reset column, the middle mold plate above the guide reset column is provided with a guide reset hole, the lower end of the guide reset column is fixedly connected with the upper ejector plate, the upper end of the guide reset column penetrates the guide reset hole of the middle mold plate, and a reset spring is sleeved on the guide reset column between the upper ejector plate and the middle mold plate. BRIEF DESCRIPTION OF DRAWINGS
[0014] Figure 1 It is a structural schematic view of the utility model.
[0015] Figure 2 It is Figure 1 It is a bottom view of the utility model in the absence of the lower mold plate.
[0016] Figure 3 It is Figure 1 It is a sectional view of the utility model.
[0017] Figure 4 It is Figure 1 It is another sectional view of the utility model in another direction.
[0018] Figure 5 It is Figure 1 It is a perspective view of the utility model in the top direction.
[0019] Figure 6 It is Figure 1 It is a structural schematic view of the utility model in the absence of the lower mold base, the middle mold plate and the formed lower mold core.
[0020] Figure 7 It is a structural schematic view of the formed lower mold core.
[0021] Figure 8 It is a structural schematic view of the middle mold plate.
[0022] Figure 9 It is a structural schematic view of the upper ejector plate.
[0023] Figure 10 It is a structural schematic view of the lower ejector plate.
[0024] Figure 11 is Figure 8 the structure diagram of another direction of the middle template. DETAILED DESCRIPTION
[0025] The utility model is further explained in connection with the drawings:
[0026] As shown in the drawings, a secondary ejection mechanism is provided with a lower template 1, the left and right sides of the lower template 1 are connected with lower die seats 2 respectively, characterized in that the lower template 1 between the lower die seats 2 is provided with an upper ejector pin plate 3 and a lower ejector pin plate 4, the lower end surface of the lower ejector pin plate 4 is provided with a secondary ejection groove 5, a secondary ejector pin plate 6 is inserted into the secondary ejection groove 5, the secondary ejector pin plate 6 and the groove bottom of the secondary ejection groove 5 of the lower ejector pin plate 4 are connected through a plug 7, the upper ejector pin plate 3 and the lower ejector pin plate 4 are provided with corresponding secondary ejection holes 9, a secondary ejection rod is fixedly connected with the secondary ejector pin plate 6, and the upper end of the secondary ejection rod is sequentially extended out of the secondary ejection holes 9 on the lower ejector pin plate 4 and the upper ejector pin plate 3 and connected with a die block.
[0027] Further, the secondary ejector pin plate 6 is connected with a limiting ejection column 8, the upper ejector pin plate 3 and the lower ejector pin plate 4 are provided with limiting ejection holes matched with the limiting ejection column 8, the lower end of the limiting ejection column 8 is connected with the secondary ejector pin plate 6, and the upper end of the limiting ejection column 8 is sequentially inserted through the limiting ejection holes 10 of the lower ejector pin plate 4 and the upper ejector pin plate 3 and extended out of the limiting ejection hole 10 of the upper ejector pin plate 3.
[0028] Further, the upper end of the lower die seat 2 is connected with a middle template 11, the middle template 11 is provided with a forming lower die core 12, the forming lower die core 12 is fixedly connected with the middle template 11, and the gap between the upper end of the limiting ejection column 8 and the lower end surface of the middle template 11 is a synchronous ejection gap of the upper ejector pin plate 3 and the lower ejector pin plate 4.
[0029] Further, a guide column 13 is installed on the lower template 1, the upper ejector pin plate 3 and the lower ejector pin plate 4 are respectively provided with guide holes 14 correspondingly, the lower end of the guide column 13 is connected with the lower template 1, and the upper end of the guide column 13 is connected with the middle template 11 after being inserted through the guide holes 14 of the upper ejector pin plate 3 and the lower ejector pin plate 4.
[0030] Further, the upper ejector pin plate 3 is provided with a guide reset column 15, the middle template 11 above the guide reset column 15 is provided with a guide reset hole 17, the lower end of the guide reset column 15 is fixedly connected with the upper ejector pin plate 3, the upper end of the guide reset column 15 is inserted into the guide reset hole 17 of the middle template 11, and the guide reset column 15 between the upper ejector pin plate 3 and the middle template 11 is sleeved with a reset spring 16.
[0031] Further, the upper ejector plate 3 is provided with a demolding ejection rod 18, the lower end of which is fixedly connected with the upper ejector plate 3, and the upper end of which is inserted into the bottom of the mold groove of the mold core after passing through the through hole of the middle mold plate 11, and the product after molding is ejected through the demolding ejection rod 18.
[0032] The plug 7 is a plastic column, the upper end of which is fixedly connected with the lower ejector plate 4, and the lower end of which is inserted into the insertion hole provided in the secondary ejector plate 6.
[0033] Taking the injection molded tee pipe as an example, the mold is manufactured and assembled, and the specific structure is as follows:
[0034] The mold comprises an upper mold plate, a molding upper mold core, a molding lower mold core 12, a middle mold plate 11, a lower mold plate 1, a lower mold base 2, an upper ejector plate 3, a lower ejector plate 4, a secondary ejector plate 6, the molding upper mold core is installed on the lower end face of the upper mold plate, the upper mold plate and the molding upper mold core are respectively installed on the output end of the press (the specific structure and connection relationship thereof are prior art, and the positions in the figure are not described in detail), the upper end face of the middle mold plate 11 is connected with the molding lower mold core 12, the molding upper mold core and the molding upper mold form the external shape of the two pipe parts in the same plane of the tee pipe, the molding lower mold core 12 is provided with a third pipe forming module, the forming module is a left module 19 and a right module 20, the left module 19 is slidingly connected with the sliding groove of the middle mold plate 11 through a sliding block, the right module 20 is connected with the secondary ejection rod which extends into the mold core sliding hole provided in the molding lower mold core 12, the molding lower mold core 12 below the forming hole after the left module 19 and the right module 20 are closed is provided with an end forming hole, a sleeve cylinder 21 is provided in the end forming hole, the outer cylinder of the sleeve cylinder 21 cooperates with the outer wall of the end forming hole, the inner rod of the sleeve cylinder 21 extends into the forming hole after the left module 19 and the right module 20 are closed, the two ends of the two pipe parts in the same plane of the tee pipe are respectively provided with an inner plug block, one end of the inner plug block is inserted into the abutment of the molding upper mold core and the molding lower mold core 12, the other end of the inner plug block extends out of the molding upper mold core and the molding lower mold core 12 and is slidingly connected with the sliding groove 22 of the middle mold plate 11 through a sliding block, the gap between the top of the sleeve cylinder 21 and the left module 19 and the right module 20, and the gap between the molding upper mold core and the molding lower mold core 12 and the inner plug block respectively form the molding cavity of the tee pipe, since the outer end of the end part of the pipe body after molding of the left module 19 and the right module 20 of the tee pipe has a bulging part, the tee pipe cannot be directly ejected and demolded, and thus a secondary ejection mechanism is needed to assist in demolding;
[0035] The module in the secondary ejection mechanism is the right module 20, the secondary ejection rod comprises an ejection inclined rod 23 and an ejection slide 24, the upper end of the ejection inclined rod 23 is connected with the right module 20, the lower end of the ejection inclined rod 23 is connected with a T-shaped slide head 28, the upper end of the ejection slide 24 is provided with a T-shaped slide groove 29, the T-shaped slide head 28 at the lower end of the ejection inclined rod 23 is in sliding connection with the T-shaped slide groove 29 at the upper end of the ejection slide 24, the upper end of the ejection slide 24 of the ejection inclined rod 23 extends out of the upper end surface of the lower ejector plate 4, the lower end of the ejection slide 24 of the ejection inclined rod 23 is sequentially threaded through the secondary ejection hole 9 on the upper ejector plate 3 and the lower ejector plate 4 and is fixedly connected with the secondary ejector plate 6, the middle die plate 11 is provided with a swing hole 25 for the movement of the ejection inclined rod 23, the swing hole 25 is matched with a die core sliding hole provided on the forming lower die core 12 to allow the ejection inclined rod 23 to swing in the swing hole 25 and the die core sliding hole 26, the outer cylinder of the control cylinder 21 is fixedly connected with the secondary ejector plate 6 by being threaded through the middle die plate 11, the upper ejector plate 3, the lower ejector plate 4 and the secondary ejector plate 6, the inner rod of the control cylinder 21 is fixedly connected with the lower die plate 1 by being threaded through the through hole on the middle die plate 11, the upper ejector plate 3, the lower ejector plate 4 and the secondary ejector plate 6, the specific connection relationship of the middle die plate 11, the lower die plate 1, the lower die seat 2, the upper ejector plate 3, the lower ejector plate 4 and the secondary ejector plate 6 is the same as that in the above embodiment, and details are not described herein again, the lower die plate 1 is provided with an ejection shaft hole 27, and an ejection shaft extending into the ejection shaft hole 27 is in contact with the lower end surface of the lower ejector plate 4.
[0036] The above upper die plate, forming upper die core, forming lower die core 12, middle die plate 11, lower die plate 1, lower die seat 2, upper ejector plate 3, lower ejector plate 4, secondary ejector plate 6, left module 19, right module 20, inner plug block and control cylinder 21 are combined and then subjected to injection molding, the design of the injection molding pipeline is prior art, and details are not described herein again, and after the injection molding is completed, demolding is performed, and the steps of demolding are as follows:
[0037] Firstly, the upper die plate and the upper molding core are moved upward to demold the upper part of the molded product, the insert core and the left module 19 are separated from the molded product under the driving of the slider, after the upper demolding is completed, the ejecting shaft is inserted into the ejecting shaft hole 27 of the lower die plate 1, and then the lower ejector plate 4, the upper ejector plate 3, the right module 20, the ejecting inclined rod 23, the ejecting slide 24 and the outer barrel of the control cylinder 21 are moved upward together, the demolding ejecting rod 18 on the upper ejector plate 3 ejects the molded product from the lower molding core 12, when the upper ejector plate 3 moves to the position where the limiting ejecting column 8 contacts the lower end surface of the middle die plate 11 (the ejecting distance can be set to 37mm), the upper ejector plate 3 and the lower ejector plate 4 continue to move upward, but the secondary ejector plate 6 is separated from the lower ejector plate 4 by overcoming the resistance of the plug 7 due to the limitation of the limiting ejecting column 8, during the process that the secondary ejector plate 6 is separated and the upper ejector plate 3 moves upward, the ejecting inclined rod 23 slides on the ejecting slide 24, the ejecting inclined rod 23 drives the right module 20 to expand and separate from the expanded part of the lower end of the molded three-way pipeline, the outer barrel of the control cylinder 21 moves the upper end of the inner rod of the control cylinder 21 (the moving distance can be set to 20mm) during the process that the upper ejector plate 3 moves upward, and the lower end of the pipeline of the three-way is separated from the inner rod of the control cylinder 21, thereby completing the whole demolding process, since the secondary ejector plate 6 is hidden in the secondary ejecting groove 5 at the lower end surface of the lower ejector plate 4, and then the secondary ejector plate 6 is separated from the secondary ejecting groove 5 through the limiting ejecting column 8, thereby realizing the secondary ejecting process.
Claims
1. A secondary ejection mechanism, provided with a lower die plate, the left and right sides of the lower die plate are connected with lower die seats, characterized in that The lower die base is provided with an upper ejector rod and a lower ejector rod on the lower die plate between the lower die bases, the lower end surface of the lower ejector rod is provided with a secondary ejection groove, a secondary ejector rod is inserted into the secondary ejection groove, the secondary ejector rod and the bottom of the secondary ejection groove of the lower ejector rod are connected through a plug, the upper ejector rod and the lower ejector rod are provided with corresponding secondary ejection holes, the secondary ejection rod is fixedly connected with the secondary ejector rod, and the upper end of the secondary ejection rod extends out of the secondary ejection holes of the lower ejector rod and the upper ejector rod in sequence and is connected with the mold block.
2. A secondary ejection mechanism according to claim 1, wherein The secondary ejector rod is connected with the limiting ejection column, the upper ejector rod and the lower ejector rod are provided with limiting ejection holes matched with the limiting ejection column, the lower end of the limiting ejection column is connected with the secondary ejector rod, and the upper end of the limiting ejection column extends out of the limiting ejection holes of the lower ejector rod and the upper ejector rod in sequence and extends out of the limiting ejection hole of the upper ejector rod.
3. A secondary ejection mechanism according to claim 1, wherein The upper end of the limiting ejection column and the lower end surface of the middle die plate are connected, and the gap between the upper end of the limiting ejection column and the lower end surface of the middle die plate is a synchronous ejection gap of the upper ejector rod and the lower ejector rod.
4. A secondary ejection mechanism according to claim 1, wherein The lower die plate is provided with a guide column, the upper ejector rod and the lower ejector rod are respectively provided with guide holes corresponding to each other, the lower end of the guide column is connected with the lower die plate, and the upper end of the guide column passes through the guide holes of the upper ejector rod and the lower ejector rod and is connected with the middle die plate.
5. A secondary ejection mechanism according to claim 1, wherein The upper ejector rod is provided with a guide reset column, the middle die plate above the guide reset column is provided with a guide reset hole, the lower end of the guide reset column is fixedly connected with the upper ejector rod, and the upper end of the guide reset column penetrates into the guide reset hole of the middle die plate.
6. A secondary ejection mechanism according to claim 1, wherein The upper ejector rod is provided with a demolding ejection rod, the lower end of the demolding ejection rod is fixedly connected with the upper ejector rod, the upper end of the demolding ejection rod penetrates through the through hole of the middle die plate and is inserted into the mold groove bottom of the mold core, and the formed product is ejected through the demolding ejection rod.