An inner plug mold

Abstract

The present application provides a kind of inner plug mold, including mutually matched front mould group and rear mould group, the front mould group includes panel, fixed plate, push plate and fixed mould plate, the fixed mould plate is slidably inserted with guide pillar, the fixed mould plate and / or the rear mould group is provided with cavity, the fixed mould plate is rotatably connected with rotating disc, the rotating disc is provided with pinhole, each the pinhole is slidably inserted with insert needle, the diameter of each the insert needle is different, the push plate is fixedly connected with ejector pin, after mold closing, the ejector pin is inserted in one of the pinholes, and is abutted at the end of corresponding insert needle, the insert needle abutted by the ejector pin is simultaneously inserted in the cavity.When the inner plug product with different liquid outlet holes needs to be produced, only need to push the fixed mould plate and the push plate away, so that the ejector pin is out of the pinhole, then rotate the rotating disc to move another pinhole to the position corresponding to the ejector pin, the replacement of insert needle can be realized, time and labor are saved, and the production efficiency is relatively high.

Description

Technical Field

[0001] This invention relates to an injection mold, and more particularly to an inner plug mold. Background Technology

[0002] In cosmetic bottles and other types of daily chemical packaging bottles, inner stoppers (or bottle stoppers) are usually used. The liquid outlet of the inner stopper serves as the channel for the liquid to flow out of the daily chemical packaging bottle, which directly determines the flow rate of the daily chemical packaging bottle. Therefore, it is common to see inner stoppers of the same size with various different diameters of liquid outlet.

[0003] Inner plugs are usually obtained by injection molding. The liquid outlet holes on the inner plug are usually achieved by insert pins inserted into the mold cavity. Different diameter liquid outlet holes require insert pins of different diameters. In traditional injection molds, to produce inner plugs of the same size but with different diameter liquid outlet holes, the mold needs to be removed from the injection molding machine, and then the original insert pin needs to be removed and another insert pin needs to be installed. This is time-consuming, labor-intensive, and has relatively low production efficiency.

[0004] In view of this, this application has conducted an in-depth study on the structure of the inner plug mold, which led to this case. Summary of the Invention

[0005] The purpose of this invention is to provide an inner plug mold that is time-saving, labor-saving, and has relatively high production efficiency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An internal plug mold includes a front mold assembly and a rear mold assembly that cooperate with each other. The front mold assembly includes a panel, a fixed plate, a push plate, and a fixed template arranged parallel to each other in sequence. The panel, the fixed plate, and the push plate are fixedly connected to each other. Guide posts fixedly connected to the panel, the fixed plate, or the push plate are slidably inserted on the fixed template. A cavity is formed on the side of the fixed template facing the rear mold assembly and / or on the side of the rear mold assembly facing the fixed template. A turntable is rotatably connected to the fixed template. At least two pinholes are formed on the turntable, centered on the axis of the turntable. The cavity is positioned... Corresponding to the movement trajectory of each pin hole, each pin hole has a sliding insert pin, each insert pin has a different diameter, and each insert pin is fitted with a return spring. One end of the return spring, which is closer to the rear module, abuts against or is fixedly connected to the turntable, and the other end abuts against or is fixedly connected to the corresponding insert pin. The push plate is fixedly connected with ejector pins arranged corresponding to the position of the cavity. After the mold is closed, the ejector pin is inserted into one of the pin holes and abuts against the end of the corresponding insert pin. The insert pin abutted by the ejector pin is simultaneously inserted into the cavity.

[0008] As an improvement of the present invention, the turntable is provided with an annular groove arranged coaxially with the turntable on the side away from the rear module. Each of the pin holes is opened at the bottom of the annular groove. A pressure ring is fixedly embedded in the annular groove. The pressure ring is provided with a through hole at the position corresponding to each of the pin holes for the ejector pin to pass through. The diameter of the through hole is smaller than the outer contour diameter of the end of the corresponding insert pin facing the push plate.

[0009] As an improvement of the present invention, the outer peripheral wall of the turntable is provided with a plurality of positioning holes that correspond one-to-one with each of the pin holes, and the fixed template is provided directly or indirectly with wave screws that cooperate with each of the positioning holes.

[0010] As an improvement of the present invention, a transmission rod is fixedly or integrally connected to the turntable, arranged coaxially with the turntable and simultaneously slidably inserted through the push plate and the fixed plate. A gear is rotatably connected to the fixed plate, sleeved on the transmission rod and drivingly connected to the transmission rod. A rack that meshes with the gear is slidably connected to the fixed plate.

[0011] As an improvement of the present invention, the panel is provided with a sliding hole for inserting the transmission rod.

[0012] As an improvement of the present invention, one end of the rack is helically connected to a rifling screw.

[0013] As an improvement of the present invention, the outer wall of the fixing plate is provided with a rotation number position line at a position corresponding to the reciprocating screw, and the end of the reciprocating screw away from the rack is provided with an indicator line that cooperates with the rotation number position line.

[0014] As an improvement of the present invention, a limiting countersunk hole is provided on the side of the fixed plate away from the push plate, and a through hole is provided at the bottom of the limiting countersunk hole. A limiting post fixedly connected to the fixed template is slidably inserted in the through hole. A limiting cap located in the limiting countersunk hole is fixedly connected or integrally connected to the end of the limiting post away from the fixed template. The outer diameter of the limiting cap is larger than the diameter of the through hole.

[0015] By adopting the above solution, the present invention has the following beneficial effects:

[0016] 1. By setting up a turntable, when it is necessary to produce inner plug products with different liquid outlet holes, simply push the fixed platen and the push plate away from each other so that the ejector pin comes out of the pin hole. Then rotate the turntable to move another pin hole to the position corresponding to the ejector pin, so that the insert pin can be replaced. There is no need to remove the mold from the injection molding machine or remove the insert pin, which saves time and effort and has relatively high production efficiency.

[0017] 2. By setting racks and gears, it is easier to drive the turntable to rotate, further improving production efficiency.

[0018] Instruction manual illustrations

[0019] Figure 1 This is a schematic diagram of the internal plug mold in the closed state of the present invention;

[0020] Figure 2 This is a schematic diagram of the inner plug mold in the open state of the present invention;

[0021] Figure 3 This is a schematic diagram of the front module in this invention;

[0022] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the connection structure of the turntable and some of the components that cooperate with the turntable in this invention, with a partial cross-section shown in the figure;

[0024] Figure 6 for Figure 5 A schematic diagram of the exploded structure of the middle view.

[0025] The corresponding markings in the diagram are as follows:

[0026] 10-Fixed module; 11-Panel;

[0027] 12-Fixed plate; 13-Push plate;

[0028] 14-Fixed template; 15-Connecting bolts;

[0029] 16-Guide pillar; 20-Rear module;

[0030] 21-Moving template; 22-Cavity;

[0031] 30 - Turntable; 31 - Needle roller bearing;

[0032] 32 - Pinhole; 33 - Pin;

[0033] 34-Return spring; 35-Ejector pin;

[0034] 36-Annular groove; 37-Pressure ring;

[0035] 38 - Perforation; 39 - Positioning hole;

[0036] 40 - Wave screw; 41 - Drive rod;

[0037] 42-Gear; 43-Rack;

[0038] 44 - Sliding hole; 45 - Riveting screw;

[0039] 46 - Rotation count position line; 47 - Indicator line;

[0040] 48 - Countersunk hole for limiting positioning; 49 - Through hole;

[0041] 50 - Limiting post. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0043] like Figures 1-6 As shown, the inner plug mold provided in this embodiment includes a front mold group 10 (also called a fixed mold group or static mold group) and a rear mold group 20 (also called a moving mold group) that cooperate with each other. The specific cooperation structure between the front mold group 10 and the rear mold group 20 is the same as that of a conventional injection mold, that is, the rear mold group 20 can slide relative to the front mold group 10, thereby realizing the mold opening or closing action. The specific cooperation structure is not the focus of this embodiment and will not be described in detail here.

[0044] The front module 10 includes a panel 11, a fixing plate 12, a push plate 13, and a fixed template 14 arranged parallel to each other in sequence. The panel 11, the fixing plate 12, and the push plate 13 are fixedly connected to each other by connecting bolts 15. Guide posts 16 are slidably inserted into the fixed template 14 and fixedly connected to the panel 11, the fixing plate 12, or the push plate 13. In this embodiment, the guide posts 16 are fixedly connected to the panel. In addition, the fixed module 10 also needs to be provided with structures such as gates and runners. These structures are the same as those of conventional injection molds and will not be described in detail here.

[0045] The structure of the rear mold assembly 20 is the same as that of a conventional injection mold, including a movable mold plate 21 that adheres tightly to the fixed mold plate 14 after mold closing. The specific structure is not the focus of this embodiment and will not be described in detail here. A cavity 22 is formed on the side of the fixed mold plate 14 facing the rear mold assembly 20 and / or on the side of the movable mold plate 21 facing the fixed mold plate 14. That is, the cavity 22 can be formed on the fixed mold plate 14, on the movable mold plate 21, or on both the fixed mold plate 14 and the movable mold plate 21. In this embodiment, the cavities 22 are formed on both the fixed mold plate 14 and the movable mold plate 21. After mold closing, the cavities 22 on the fixed mold plate 14 and the movable mold plate 21 together form the product cavity for molding the product. It should be noted that there can be more than two product cavities.

[0046] A set of turntables 30, the same number as the product cavities, are rotatably connected to the fixed template 14 and arranged in a one-to-one correspondence. In this embodiment, the structure is described using one set of corresponding product cavities and turntables 30 as an example. Specifically, the turntables 30 are embedded in the fixed template 14, and a needle roller bearing 31 is provided between the turntables 30 and the fixed template 14. The axis of the turntables 30 is arranged parallel to the guide post 16. At least two pinholes 32 are provided on the turntables 30, centered on the axis of the turntables 30. The distance between each pinhole 32 and the axis of the turntables 30 is the same, and each pinhole 32 is a stepped hole. The position of the cavity corresponds to the movement trajectory of each pinhole 32; that is, when one of the pinholes 32 moves to a predetermined position around the axis of the turntable 30, that pinhole 32 communicates with the cavity 22. Each pin 32 has a sliding insert pin 33, and the diameters of each insert pin 33 are different, so as to form internal plugs with different diameters for liquid discharge. At the same time, each insert pin 33 is fitted with a return spring 34. The end of the return spring 34 that is closer to the rear module 20 abuts against or is fixedly connected to the turntable 30, and the other end abuts against or is fixedly connected to the corresponding insert pin 33. In this embodiment, the end of the insert pin 33 facing the push plate 13 has an outer protruding ring. The end of the return spring 34 that is closer to the rear module 20 abuts against the stepped surface of the corresponding pin hole 32, and the other end abuts against the corresponding outer protruding ring.

[0047] Ejector pins 35 are fixedly connected to the push plate 13, corresponding to the positions of the cavities 22. That is, the number of ejector pins 35 is the same as the number of product cavities and they are arranged in a one-to-one correspondence. In this embodiment, one of them is used as an example for explanation. After the mold is closed, the ejector pin 35 is inserted into one of the pin holes 32 and abuts against the end of the corresponding insert pin 33. The pin hole 32 through which the ejector pin 35 is inserted is the pin hole 32 that has moved to a predetermined position around the axis of the turntable 30 as described above. The insert pin 33 abutted by the ejector pin 35 is simultaneously inserted into the cavity 22.

[0048] Preferably, in order to prevent the insert pin 33 from coming out of the pin hole 32, in this embodiment, the turntable 30 is provided with an annular groove 36 arranged coaxially with the turntable 30 on the side away from the rear module 20. Each pin hole 32 is opened at the bottom of the annular groove 36. A pressure ring 37 is fixedly embedded in the annular groove 36. The pressure ring 37 is provided with a through hole 38 for the ejector pin 35 to pass through at the position corresponding to each pin hole 32. The diameter of the through hole 38 is smaller than the outer contour diameter of the end of the corresponding insert pin 33 facing the push plate 13 (i.e., the outer convex ring). This can ensure that the ejector pin 35 can be inserted while preventing the insert pin 33 from coming out. In addition, the outer peripheral wall of the turntable 30 is provided with a plurality of positioning holes 39 corresponding to each pin hole 32. The fixed template 14 is provided with a corrugated screw 40 that mates with each positioning hole 39 directly or indirectly. When the corrugated screw 40 is inserted into one of the positioning holes 39, the pin hole 32 corresponding to the positioning hole 39 is located at the pre-set position mentioned above. This makes it easy to determine whether the turntable 30 has been rotated to the correct position when rotating the turntable 30, and also avoids the turntable 30 being rotated accidentally during use.

[0049] Preferably, to facilitate the rotation of the turntable 30, in this embodiment, a transmission rod 41 is fixedly or integrally connected to the turntable 30, coaxially arranged with the turntable 30, and slidably inserted on the push plate 12 and the fixed plate 13. Simultaneously, a gear 42 is rotatably connected to the fixed plate 13, sleeved on the transmission rod 41 and drivingly connected to it. Specifically, the transmission rod 41 can be a non-circular rod, and the cross-section of the inner hole of the gear 42 that mates with the transmission rod 41 can be set to match the cross-section of the transmission rod 41, thereby achieving a sliding connection and a driving connection between the two. Alternatively, an external spline section can be directly provided on the transmission rod 41, and an internal spline hole can be provided on the gear 42, using spline engagement to achieve a sliding connection and a driving connection between the two. A rack 43 that meshes with the gear 42 is also slidably connected to the fixed plate 13. This allows the gear 42 to rotate by pushing the rack 43, thereby causing the turntable 30 to rotate. It should be noted that the same rack 43 can mesh with two or more gears 42. In addition, if necessary, a sliding hole 44 for inserting the transmission rod 41 can be provided on the panel 11. After the mold is closed, the transmission rod 41 can be inserted into the sliding hole 44, which allows the transmission rod 41 to have a larger sliding stroke.

[0050] Furthermore, in order to more accurately control the rotation position of the turntable 30, in this embodiment, one end of the rack 43 is helically connected to a reciprocating screw 45, the end of the reciprocating screw 45 away from the rack 43 is close to the outer side wall of the fixing plate 12, and the outer side wall of the fixing plate 13 is provided with a rotation number position line 46 at the position corresponding to the reciprocating screw 45, and at the same time, the end of the reciprocating screw 45 away from the rack 43 is provided with an indicator line 47 that cooperates with the rotation number position line 46.

[0051] Preferably, in order to limit the sliding stroke of the fixed template 14, in this embodiment, a limiting countersunk hole 48 is provided on the side of the fixed plate 12 away from the push plate 13, and a through hole 49 is provided at the bottom of the limiting countersunk hole 48. A limiting post 50 fixedly connected to the fixed template 14 is slidably inserted into the through hole 49. Of course, the limiting post 50 needs to be slidably inserted into the push plate 13 to be fixedly connected to the fixed template 14. A limiting cap located in the limiting countersunk hole 48 is fixedly connected or integrally connected to the end of the limiting post 50 away from the fixed template 14. The outer diameter of the limiting cap is larger than the diameter of the through hole 49, thereby achieving the limiting.

[0052] The injection molding process of the inner plug mold provided in this embodiment is the same as that of a conventional injection mold. When the insert pin 33 needs to be replaced, the inner plug mold is switched to the open state, and then the fixed platen 14 is slid to the extreme position in the direction of the rear module 20, so that the ejector pin 35 is separated from the turntable 30. Then, the rewinding screw 45 is rotated with the help of a screwdriver or Allen wrench (which needs to be configured separately and is not part of this embodiment), and then the turntable 30 is rotated through the rack 43 until the required insert pin 33 moves to the preset position mentioned above. Then, the fixed platen 14 is pushed to reset, so that the ejector pin 35 passes through the corresponding pin hole 32, and the process of replacing the insert pin 33 is completed. Production can continue without disassembling the mold.

[0053] The present invention has been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the above embodiments. Those skilled in the art can make various modifications to the present invention based on the prior art, and these modifications all fall within the protection scope of the present invention.

Claims

1. An inner closure mold comprising a front mold block and a back mold block which cooperate with each other, characterized in that, The front mold set comprises panels, a fixed plate, a push plate and a fixed mold plate arranged in sequence and parallel to each other, the panels, the fixed plate and the push plate are fixedly connected to each other, guide columns fixedly connected to the panels, the fixed plate or the push plate are slidingly inserted into the fixed mold plate, a cavity is formed on the side of the fixed mold plate facing the rear mold set and / or the side of the rear mold set facing the fixed mold plate, a rotating disc is rotatably connected to the fixed mold plate, at least two pinholes are formed on the rotating disc and arranged around the axis of the rotating disc, the position of the cavity corresponds to the movement track of each pinhole, each pinhole slidingly inserts an inlay pin, the diameters of the inlay pins are different from each other, a return spring is sleeved on each inlay pin, one end of the return spring close to the rear mold set abuts against or is fixedly connected to the rotating disc, and the other end abuts against or is fixedly connected to the corresponding inlay pin, a ejector pin corresponding to the position of the cavity is fixedly connected to the push plate, after the mold is closed, the ejector pin is inserted into one of the pinholes and abuts against the end of the corresponding inlay pin, and the inlay pin abutted by the ejector pin is simultaneously inserted into the cavity; An annular groove coaxially arranged with the rotating disc is formed on the side of the rotating disc away from the rear mold set, each pinhole is formed in the groove bottom of the annular groove, a press ring is fixedly embedded in the annular groove, a through hole for the ejector pin to pass through is formed in the press ring at a position corresponding to each pinhole, and the diameter of the through hole is smaller than the outer contour diameter of the end of the corresponding inlay pin facing the push plate; A plurality of positioning holes corresponding to each pinhole are formed on the outer peripheral wall of the rotating disc, and a wave screw is directly or indirectly arranged on the fixed mold plate and matched with each positioning hole.

2. The inner closure mold of claim 1, wherein, A transmission rod coaxially arranged with the rotating disc and simultaneously slidingly inserted into the push plate and the fixed plate is fixedly connected or integrally connected to the rotating disc, a gear rotatably connected to the transmission rod and in transmission connection with the transmission rod is rotatably connected to the fixed plate, and a rack in mesh with the gear is slidingly connected to the fixed plate.

3. The inner closure mold of claim 2, wherein, A sliding hole for inserting the transmission rod is formed on the panel.

4. The inner closure mold of claim 2, wherein, A bolt screw is screw-connected to one end of the rack.

5. The inner closure mold of claim 4, wherein, A rotation number position line is arranged on the outer side wall of the fixed plate at a position corresponding to the bolt screw, and an indicating line matched with the rotation number position line is arranged on the end of the bolt screw away from the rack.

6. The inner closure mold of claim 1, wherein, A limiting counterbore is formed on the side of the fixed plate away from the push plate, a through hole is formed in the bottom of the limiting counterbore, a limiting column fixedly connected to the fixed mold plate is slidingly inserted into the through hole, and a limiting cap located in the limiting counterbore is fixedly connected or integrally connected to the end of the limiting column away from the fixed mold plate, and the outer diameter of the limiting cap is greater than the diameter of the through hole.

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