Positioning structure and mold for multi-injection molding plate toy

Abstract

The utility model relates to toy molding technical field provides a kind of positioning structure and mould of multiple injection molding plate toy, the positioning structure of multiple injection molding plate toy includes profiling fixture and the second positioning column on the two-shot mould;Profiling fixture has locating hole, the two-shot mould has the cavity that can accommodate single part formed after once injection molding, when profiling fixture with single part is adsorbed and is assembled to the second positioning column through the locating hole, single part can be positioned in the cavity.The utility model solves the problem that there is deviation due to the shrinkage of plate caused by positioning by plate locating hole in the prior art, realizes the accurate positioning of plate in multiple-shot mould, and ensures the stability of product quality.

Description

Technical Field

[0001] This utility model relates to the field of toy molding technology, specifically to a positioning structure and mold for a multi-injection molded sheet toy. Background Technology

[0002] In existing technologies, when board toys are molded through multiple injection molding, it is generally necessary to first mold a single part in a single injection mold, and then transfer the entire board to a multi-injection mold for multiple molding processes to form the entire board. In this molding process, the positioning of the single part after it is taken out of the single injection mold and placed on the multi-injection mold mainly relies on positioning holes set on the board. However, the board shrinks during the molding process, which can cause deviations in the positioning holes. Therefore, there are problems such as inaccurate positioning, which greatly affects the quality of the product. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a positioning structure and mold for multi-injection molded sheet toys.

[0004] The positioning structure of a multi-injection molded sheet toy provided by this utility model includes a contour jig and a second positioning post disposed on the two-shot mold.

[0005] The contour jig has a positioning hole, and the two-shot mold has a cavity for accommodating a single part formed after one injection molding. When the contour jig holding the single part is assembled onto the second positioning post through the positioning hole, the single part can be positioned in the cavity.

[0006] Preferably, a second linear bearing is disposed on the positioning hole.

[0007] Preferably, the second positioning posts are all made of iron.

[0008] Preferably, the profiling fixture is capable of ejecting the individual part through its own ejector pin and placing it in the cavity.

[0009] Preferably, the ejector pin is driven by a cylinder.

[0010] Preferably, each of the individual parts corresponds to one or more of the ejector pins.

[0011] Preferably, the plurality of the top points are arranged symmetrically.

[0012] Preferably, the cross-section of the second positioning post is circular, rhomboid, or regular polygonal.

[0013] Preferably, the contour jig picks up the individual part using a suction cup.

[0014] Preferably, the contour jig is driven by a robotic arm.

[0015] According to the mold provided by this utility model, the positioning structure of the multi-injection molding board toy is used to realize the multi-injection molding of the board toy.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] This invention, after a single part is formed in one shot, uses a contour jig to transfer the single part to a multi-shot mold. The precise positioning of the single part is achieved by the cooperation between the positioning hole on the contour jig and the positioning pin on the multi-shot mold. This solves the problem of deviation caused by the shrinkage of the sheet metal when relying on the positioning hole of the sheet metal for positioning in the prior art. It realizes the accurate positioning of the sheet metal in the multi-shot mold and ensures the stability of product quality. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 A top view schematic diagram of the structure of a molding die;

[0020] Figure 2 for Figure 1 Sectional view along line AA;

[0021] Figure 3 for Figure 2 Enlarged structural diagram of part A in the middle;

[0022] Figure 4 for Figure 2 Enlarged structural diagram of section B in the middle;

[0023] Figure 5 This is a structural schematic diagram of a single part;

[0024] Figure 6 This is a top view schematic diagram of the structure of a two-shot mold;

[0025] Figure 7 for Figure 1 Sectional view along the BB direction;

[0026] Figure 8 This is an exploded view of the structure of a contour jig, in which the lower fixing plate of the ejector pin is not shown;

[0027] Figure 9 This is a bottom view diagram of the structure of a contour jig;

[0028] Figure 10 for Figure 9 C-axis sectional view;

[0029] Figure 11 This is a side view diagram of the contour jig structure;

[0030] Figure 12 This is a structural diagram of the entire panel.

[0031] The diagram shows:

[0032] One-shot mold 1;

[0033] First positioning post 11;

[0034] First male mold core 12;

[0035] First public template 13;

[0036] First upper ejector plate 14; First lower ejector plate 15; Delay space 151;

[0037] First lower fixing plate 16; sprue material dome pin 17; delay dome pin 18;

[0038] First ejector needle 19;

[0039] 101 cold runner well; 2-shot mold;

[0040] Second positioning post 21;

[0041] Second male mold core 22;

[0042] Second public template 23;

[0043] Second upper ejector plate 24; Third spring 241;

[0044] Second lower ejector plate 25; Second lower fixing plate 26; Round ejector pin 27;

[0045] Second ejector needle 28;

[0046] 3 pieces in total;

[0047] 31 for a single part;

[0048] Part Two, 32;

[0049] Copying fixture 4;

[0050] Connecting plate 41;

[0051] First screw 411;

[0052] Second screw 412;

[0053] First support post 413;

[0054] 4131 wire thread insert;

[0055] Fixed motherboard 42;

[0056] First linear bearing 421;

[0057] Second linear bearing 422;

[0058] Third linear bearing 423;

[0059] Piston 424;

[0060] Connecting post 425;

[0061] Second support column 426;

[0062] Ejector pin lower fixing plate 43;

[0063] Ejector pin upper fixing plate 44;

[0064] Thimble 441;

[0065] First spring 4411;

[0066] Guide shaft 442;

[0067] Second spring 4421;

[0068] Contouring fixture fixing plate 45;

[0069] Suction connection hole 451;

[0070] Jig board 46;

[0071] Cylinder 47;

[0072] Suction cup assembly 48. Detailed Implementation

[0073] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0074] This utility model provides a positioning structure for multi-injection molded sheet toys, such as... Figures 1 to 12 As shown, it includes a contour jig 4 and a second positioning post 21 disposed on the two-shot mold 2. The contour jig 4 has a positioning hole. The two-shot mold 2 has a cavity for accommodating a single part 31 formed after one injection molding. The injection molding of the single part 31 is completed in the one-shot mold 1. When the contour jig 4 with the single part 31 adsorbed is assembled onto the second positioning post 21 through the positioning hole, the single part 31 can be positioned in the cavity.

[0075] It should be noted that the first-shot mold 1 is designed with a shrinkage rate of 16-20‰ for a single part 31. The entry point is designed as a separate entry point and the part arrangement is consistent with the second-shot mold 2. The second-shot mold 2 has a cavity to accommodate a single part 31. The contour jig 4 places the single part 31 in the cavity through its own ejector pin.

[0076] Furthermore, the position of a single part 31 in the first injection mold 1 corresponds to its position in the second injection mold 2. After the contour jig 4 is positioned on the first injection mold 1 to pick up the single part 31, it is moved to the second injection mold 2 and positioned thereafter, allowing the single part 31 to be placed in the cavity to meet the needs of secondary molding. During the injection molding process, after the single part 31 is formed, it is ejected and separated from the sprue. The robotic arm drives the contour jig 4 to remove the single part 31 and the sprue. Midway through the process, the sprue is placed into the recycling bin, and then the single part 31 is placed into the second injection mold 2. The sprue here is the runner.

[0077] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the injection mold 1 includes a first positioning post 11, a first male mold core 12, a first male template 13, a first upper ejector plate 14, a first lower ejector plate 15, a first lower fixing plate 16, a sprue ejector pin 17, a delay ejector pin 18, a first ejector sleeve pin 19, and a sprue cold slug well 101. The first male mold core 12, the first male template 13, the first upper ejector plate 14, the first lower ejector plate 15, and the first lower fixing plate 16 are arranged sequentially from top to bottom. The first positioning post 11 passes through the first male mold core 12 and its bottom end abuts against the first male template 13. The top end of the first positioning post 11 extends above the first male mold core 12. The contour jig 4 achieves positioning in the injection mold 1 through the first positioning post 11, thereby accurately picking up individual parts 31.

[0078] Furthermore, the bottom of the delay ejector pin 18 is disposed on the first lower fixing plate 16, and the upper end passes through the first lower ejector plate 15 and is connected to the bottom of the sprue ejector pin 17. The top of the sprue ejector pin 17 passes through the first upper ejector plate 14 and the first male mold plate 13 in sequence and extends to the top of the first male mold core 12. The sprue cold slug well 101 is disposed below the individual part 31.

[0079] like Figure 2 , Figure 4 As shown, a delay space 151 is configured on the first lower ejector plate 15, the height of which is L, where L is the delay distance, and the value of L is 5-8mm. A reverse draft mold is made on the first male mold core 12, that is, a sprue cooling slug well 101 is set on the first male mold core 12. Figure 3As shown, the cross-section of the sprue cooling well 101 is an inverted trapezoidal structure. The angle between the hypotenuse of the inverted trapezoidal structure and the vertical direction is 5-10°. The depth of the sprue cooling well 101 is 3-5mm. The purpose of setting the sprue cooling well 101 is to increase the pulling force of the flow channel. First, the individual parts 31 are pushed out. During the pushing process, the individual parts 31 are pulled apart from the flow channel inlet. After being pushed out 5-8mm, the flow channel is pushed out together to the distance where it can be removed.

[0080] like Figure 6 , Figure 7 As shown, the two-shot mold 2 includes a second positioning post 21, a second male mold core 22, a second male template 23, a second upper ejector plate 24, a second lower ejector plate 25, a second lower fixing plate 26, a round ejector pin 27, and a second ejector sleeve pin 28. The second male mold core 22, the second male template 23, the second upper ejector plate 24, the second lower ejector plate 25, and the second lower fixing plate 26 are arranged sequentially from top to bottom. The second positioning post 21 passes through the second male mold core 22 and its bottom end abuts against the top of the second male template 23. The top end of the second positioning post 21 extends above the second male mold core 22. The contour jig 4 is positioned on the two-shot mold 2 through the second positioning post 21. The cross-section of the second positioning post 21 can be designed as a circle, a rhombus, or a regular polygon.

[0081] Furthermore, the top of the ejector pin 27 extends into the second male mold core 22. The ejector pin 27 can move relative to the second male mold core 22 and the second male mold plate 23, thereby ejecting the entire plate 3. The second ejector pin 28 extends into the second male mold plate 23 and the second upper ejector plate 24. A third spring 241 is disposed between the second male mold plate 23 and the second upper ejector plate 24. When the second male mold plate 23 moves close to the second upper ejector plate 24, the entire plate 3 is ejected by the ejector pin 27, and the third spring 241 is compressed. In its natural state, the third spring 241 can elastically push the second male mold plate 23 to its initial position.

[0082] like Figure 8As shown, the profilotype fixture 4 includes a connecting plate 41, a fixed main plate 42, a lower ejector pin fixing plate 43, an upper ejector pin fixing plate 44, an ejector pin 441, a guide shaft 442, a connecting column 425, a profilotype fixture fixing plate 45, a fixture plate 46, a cylinder 47, and a suction cup assembly 48. The connecting plate 41, the fixed main plate 42, the lower ejector pin fixing plate 43, the upper ejector pin fixing plate 44, the profilotype fixture fixing plate 45, and the fixture plate 46 are arranged sequentially. The connecting plate 41 and the fixed main plate 42 are connected in series. A first pad post 413 is arranged between the plates 42. Both ends of the first pad post 413 are equipped with wire thread sleeves 4131. One end of the first pad post 413 is detachably fixed to the connecting plate 41 by a first screw 411, and the other end of the first pad post 413 is detachably fixed to the fixing main plate 42 by a second screw 412. The cylinder 47 is arranged on the ejector pin fixing plate 44, and the end of the ejector rod of the cylinder 47 is arranged on the contour jig fixing plate 45.

[0083] The fixed main board 42 is equipped with multiple first linear bearings 421, second linear bearings 422 and third linear bearings 423, preferably four first linear bearings 421 and four second linear bearings 422. One end of the guide shaft 442 is disposed on the contour jig fixing plate 45, and the other end of the guide shaft 442 extends into the first linear bearing 421 and can slide in the first linear bearing 421. A first spring 4411 is fitted on the guide shaft 442, and the first spring 4411 is located between the contour jig fixing plate 45 and the first linear bearing 421.

[0084] Furthermore, one end of the connecting post 425 is fixed to the contour jig fixing plate 45, and the other end of the connecting post 425 passes through the fixing main plate 42 and is limited by the protrusion at the end. A second spring 4421 is fitted on the connecting post 425 and the second spring 4421 is located between the fixing main plate 42 and the contour jig fixing plate 45. The second spring 4421 is always in a compressed state.

[0085] Specifically, a plunger 424 is disposed on the side of the lower ejector plate 43 facing the fixed main plate 42, and there is a gap between the plunger 424 and the fixed main plate 42. One end of the ejector pin 441 is disposed on the upper ejector plate 44 and contacts the end of the plunger 424 facing away from the fixed main plate 42. The lower ejector plate 43 and the upper ejector plate 44 are connected by a second pad 426. The other end of the ejector pin 441 passes through the upper ejector plate 44 and the profiling fixture plate 45 in sequence and extends into the fixture plate 46. The profiling fixture 4 can eject a single part 31 through the ejector pin 441 and place it in the cavity. The movement of the ejector pin 441 is driven by the cylinder 46. When the cylinder 47 retracts, it moves the upper fixing plate 44 of the ejector pin closer to the copying fixture fixing plate 45 and fixture plate 46, and the ejector pin 441 presses against the individual part 31, causing the individual part 31 to fall off and be accurately placed in the required position on the plate. When the cylinder 47 extends, the upper fixing plate 44 of the ejector pin moves away from the copying fixture fixing plate 45 and fixture plate 46, and the ejector pin 441 moves away from the fixture plate 46.

[0086] Furthermore, the fixed main board 42 has multiple positioning holes, and the positioning holes are equipped with second linear bearings 422, preferably a total of 4 second linear bearings 422. The second linear bearings 422 are used to match the first positioning post 11 and be positioned on the first injection mold 1, or to match the second positioning post 21 and be positioned on the second injection mold 2, so as to pick up a single part 31 or place a single part 31 in the cavity.

[0087] This utility model also provides a mold that uses a positioning structure for multiple injection molding of sheet toys to achieve multiple injection molding of sheet toys.

[0088] The principle of injection molding for slab toy products is as follows:

[0089] First, a first part is formed on a molding die 1 to form a single part 31, and the single part 31 is picked up by a contour jig 4;

[0090] Secondly, the profiling fixture 4 with a single part 31 is assembled into the two-shot mold 2, and the positioning of the single part 31 is achieved by positioning the profiling fixture 4.

[0091] Finally, the second part 32 is formed on the single part 31 by the two-shot mold 2, thereby forming the entire plate 3, which is preferably a two-color joint part.

[0092] The working principle of the contour jig in this utility model is as follows:

[0093] The contour jig 4 is equipped with an ejector pin 441, which ejects individual parts 31, making the placement of individual parts 31 more precise. Specifically, the contour jig fixing plate 45 is equipped with a suction cup assembly 48 and a suction connection hole 451. The suction cup assembly 48 has a suction cup at its end, which extends to the outside of the jig plate 46. The suction connection hole 451 connects to the suction cup, and the suction cup can be activated by controlling suction or blowing.

[0094] First, control the suction cup to release. At this time, control the ejector pin 441 to eject, so that the individual part 31 can be accurately placed in the required position on the plate. The ejector pin corresponds to the individual part 31. Preferably, one part corresponds to one to three ejector pins 441. When using one ejector pin 441, the ejector pin 441 should be directly opposite the center position of the part. If two ejector pins 441 are set, they should be placed symmetrically with respect to the position of the part. The purpose is to enable the individual part 31 to be placed parallel or stably on the two-shot mold 2.

[0095] The ejector pin 441 is mounted on the ejector pin fixing plate 44. When the cylinder 47 retracts, it can drive the ejector pin fixing plate 44 to move closer to the contour jig fixing plate 45 and jig plate 46, thereby driving the ejector pin 441 to move toward the jig plate 46 to realize the ejection action of a single part 31.

[0096] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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, they should not be construed as limitations on this application.

[0097] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A positioning structure for a multi-injection molded sheet toy, characterized in that, Includes a contour jig (4) and a second positioning post (21) disposed on the two-shot mold (2); The profiling fixture (4) has a positioning hole, and the two-shot mold (2) has a cavity for accommodating a single part (31) formed after one injection molding. When the profiling fixture (4) with the single part (31) adsorbed is assembled onto the second positioning post (21) through the positioning hole, the single part (31) can be positioned in the cavity.

2. The positioning structure for multi-injection molded sheet toy according to claim 1, characterized in that, A second linear bearing (422) is disposed on the positioning hole.

3. The positioning structure for multi-injection molded sheet toy according to claim 1, characterized in that, The second positioning post (21) is made of iron.

4. The positioning structure for multi-injection molded sheet toy according to claim 1, characterized in that, The profiling fixture (4) can eject the individual part (31) through its own ejector pin (441) and place it in the cavity.

5. The positioning structure for a multi-injection molded sheet toy according to claim 4, characterized in that, The ejector pin (441) is driven by a cylinder (46).

6. The positioning structure for a multi-injection molded sheet toy according to claim 4, characterized in that, Each of the individual parts (31) corresponds to one or more of the ejector pins (441).

7. The positioning structure for a multi-injection molded sheet toy according to claim 6, characterized in that, Multiple of the aforementioned ejector pins (441) are arranged symmetrically.

8. The positioning structure for a multi-injection molded sheet toy according to claim 1, characterized in that, The cross-section of the second positioning post (21) is circular, rhomboid or regular polygonal.

9. The positioning structure for a multi-injection molded sheet toy according to claim 1, characterized in that, The contour jig (4) picks up the individual part (31) using a suction cup.

10. The positioning structure for a multi-injection molded sheet toy according to claim 1, characterized in that, The profiling fixture (4) is driven by a robotic arm.

11. A mold, characterized in that, The positioning structure of the multi-injection molded sheet toy as described in any one of claims 1 to 10 is used to realize the multi-injection molding of the sheet toy.

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