Plate toy product injection molding method and mold

Abstract

The invention relates to the technical field of toy molding, and provides a plate toy product injection molding method and mold, and the plate toy product injection molding method comprises the following steps: step 1, forming a first part on a first injection mold so as to form a single part; 2, the single part is picked up through a profiling jig; 3, the profiling jig with the single part is assembled into a two-injection mold, and positioning of the single part is achieved in the mode of positioning the profiling jig; and 4, a second part is formed on the single part through the two-injection mold, and then the whole plate is formed. Precise positioning of the single part on the multi-injection mold is achieved in the mode of positioning the profiling jig, due to the fact that the shrinkage rate of the single part is stable, shrinkage of the center point of a single product is easy to control, the mold repairing difficulty is lowered, and the stability of the product quality is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of toy molding, and in particular to an injection molding method and a mold for a panel toy product. Background Art

[0002] In the prior art, when a panel toy is formed by multiple injection molding, the entire runner design and panel product molding are first performed, and then the entire panel is moved to a multiple molding mold for multiple molding. This molding method generally shrinks the center of the entire part. Since the shrinkage rate of the entire part cannot be controlled, the difficulty of mold repair increases, which greatly affects the quality of the product. Summary of the Invention

[0003] In view of the defects in the prior art, the purpose of the present invention is to provide a method and mold for injection molding a panel toy product.

[0004] According to the present invention, a method for injection molding a panel toy product comprises the following steps:

[0005] Step 1: First, mold the first part in a single shot mold to form a single part;

[0006] Step 2: Pick up the single part by a profiling jig;

[0007] Step 3: Assembling the profiling jig with the single part into a two-shot mold and positioning the single part by positioning the profiling jig;

[0008] Step 4: Molding a second portion on the single part through the two-shot mold to form the entire panel.

[0009] Preferably, the one-shot mold is provided with a first positioning post, and the two-shot mold is provided with a second positioning post, and the profiling jig is positioned on the one-shot mold and the two-shot mold respectively through the first positioning post and the second positioning post.

[0010] Preferably, the first positioning column and the second positioning column are both made of iron.

[0011] Preferably, the profiling jig has positioning holes corresponding to the first positioning column and the second positioning column, and the positioning holes are provided with second linear bearings.

[0012] Preferably, the two-shot mold has a cavity for accommodating the single part, and the profiling jig places the single part in the cavity through its own ejector pins.

[0013] Preferably, each of the single parts corresponds to one ejector pin or a plurality of ejector pins.

[0014] Preferably, the plurality of top pins are arranged symmetrically.

[0015] Preferably, the position of the single part in the first-shot mold corresponds to the position in the second-shot mold so that the single part picked up by the profiling jig positioned on the first-shot mold can be placed in the cavity when positioned on the second-shot mold.

[0016] Preferably, the contoured jig picks up the single part via a suction cup.

[0017] Preferably, the contouring tool is driven by a robot.

[0018] According to a mold provided by the present invention, the above-mentioned plate toy product injection molding method is adopted to realize multiple injection molding of the plate toy.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention adds a profiling jig. After the single part is formed, the profiling jig is used to transfer the single part to the multi-shot mold and accurately position the single part on the multi-shot mold by positioning the profiling jig. Since the shrinkage rate of the single part is stable, the shrinkage of the center point of the single product is easy to control, which reduces the difficulty of mold repair and ensures the stability of product quality.

[0021] 2. The present invention transfers the single part to the multi-shot mold through a profiling jig after single-shot molding, and realizes precise positioning of the single part through the cooperation of the positioning holes on the profiling jig and the positioning columns on the multi-shot mold, which solves the problem of deviation caused by the shrinkage of the plate when relying on the positioning holes of the plate in the prior art, realizes the accurate positioning of the plate in the multi-shot mold, and ensures the stability of product quality.

[0022] 3. The profiling jig of the present invention adds an ejector pin to eject a single part, so that the part can be placed parallel or stably on the multi-shot mold, which is beneficial to the stability of product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0024] Figure 1 Schematic diagram of the top view of the structure of a single shot mold;

[0025] Figure 2 for Figure 1 Middle AA section view;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of the structure of part A in the middle;

[0027] Figure 4 for Figure 2 A schematic diagram of the structure of the middle B part;

[0028] Figure 5 It is a structural diagram of a single part;

[0029] Figure 6 Schematic diagram of the top view of the two-shot mold structure;

[0030] Figure 7 for Figure 6 Middle BB section view;

[0031] Figure 8 This is an exploded diagram of the profiling fixture, in which the lower fixing plate of the ejector pin is not drawn;

[0032] Figure 9 It is a schematic diagram of the structure of the profiling jig from a bottom up view;

[0033] Figure 10 for Figure 9 Middle CC section view;

[0034] Figure 11 It is a side schematic diagram of the structure of the profiling fixture;

[0035] Figure 12 A schematic diagram of the structure of the entire panel.

[0036] The figure shows:

[0037] One shot mold 1;

[0038] A first positioning column 11;

[0039] The first male mold 12;

[0040] First public template 13;

[0041] First upper ejector plate 14;

[0042] First lower ejector plate 15;

[0043] Delayed Space 151;

[0044] a first lower fixing plate 16;

[0045] Nozzle material dome needle 17;

[0046] Delay dome needle 18;

[0047] First cylinder needle 19;

[0048] Water inlet cold material well 101;

[0049] Two-shot mold 2;

[0050] A second positioning column 21;

[0051] The second male mold 22;

[0052] Second public template 23;

[0053] Second upper ejector plate 24;

[0054] a third spring 241;

[0055] Second lower ejector plate 25;

[0056] a second lower fixing plate 26;

[0057] Dome needle 27;

[0058] Second sleeve needle 28;

[0059] The entire plate 3;

[0060] Single part 31;

[0061] Part II 32;

[0062] Copying fixture 4;

[0063] Connecting plate 41;

[0064] a first screw 411;

[0065] a second screw 412;

[0066] First pad 413;

[0067] Wire thread insert 4131;

[0068] Fixed main board 42;

[0069] First linear bearing 421;

[0070] Second linear bearing 422;

[0071] a third linear bearing 423;

[0072] Plunger 424;

[0073] Connecting column 425;

[0074] Second pad 426;

[0075] Ejector lower fixing plate 43;

[0076] Ejector upper fixing plate 44;

[0077] thimble 441;

[0078] first spring 4411;

[0079] Guide shaft 442;

[0080] Second spring 4421;

[0081] Profiling fixture fixing plate 45;

[0082] Suction connection hole 451;

[0083] Jig board 46;

[0084] Cylinder 47;

[0085] Suction cup assembly 48. DETAILED DESCRIPTION

[0086] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0087] The present invention provides a method for injection molding a plate toy product, such as Figures 1 to 12 As shown, the following steps are included:

[0088] Step 1: First, a first portion is formed on a single shot mold 1 to form a single part 31;

[0089] Step 2: Pick up a single part 31 by the profiling fixture 4;

[0090] Step 3: Assemble the profiling jig 4 with the single part 31 into the two-shot mold 2 and position the single part 31 by positioning the profiling jig 4;

[0091] Step 4: Using the two-shot mold 2 to mold the second portion 32 on the single part 31 to form the entire panel 3.

[0092] It should be noted that the entire panel 3 is preferably a two-color joint part. The one-shot mold 1 is designed with a shrinkage rate of 16 to 20‰ for the single part 31. The entry point is designed to be separated by ejection. The part arrangement position is consistent with the two-shot mold 2. The two-shot mold 2 has a cavity for accommodating the single part 31. The profiling fixture 4 places the single part 31 in the cavity using its own ejector pin. Compared with the existing technology, the present invention first forms the single part 31 and then forms the entire panel 3. This achieves precise positioning of the single part on the two-shot mold. Since the shrinkage rate of the single part is stable, the shrinkage of the single product's center point is easy to control, which reduces the difficulty of mold repair and ensures the stability of product quality.

[0093] Furthermore, the position of individual part 31 in the first-shot mold 1 corresponds to its position in the second-shot mold 2. After the profiling jig 4 is positioned on the first-shot mold 1 and picks up individual part 31, it is then moved to the second-shot mold 2 and positioned, allowing individual part 31 to be placed in the mold cavity, meeting the requirements of secondary molding. During the injection molding process, individual part 31 is ejected after molding, and separated from the sprue. The robot drives the profiling jig 4 to remove the individual part 31 and the sprue. The sprue is placed in a recycling bin midway, and then the individual part 31 is placed back into the second-shot mold 2. The sprue here is the runner.

[0094] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, an injection mold 1 includes a first positioning column 11, a first male mold core 12, a first male mold plate 13, a first upper ejector plate 14, a first lower ejector plate 15, a first lower fixed plate 16, a sprue round ejector needle 17, a delay round ejector needle 18, a first sleeve needle 19 and a sprue cold material well 101. The first male mold core 12, the first male mold plate 13, the first upper ejector plate 14, the first lower ejector plate 15 and the first lower fixed plate 16 are arranged in sequence from top to bottom. The first positioning column 11 passes through the first male mold core 12 and the bottom end abuts on the first male mold plate 13. The top end of the first positioning column 11 extends to the top of the first male mold core 12. The profiling jig 4 is positioned in the injection mold 1 through the first positioning column 11 and can accurately pick up a single part 31.

[0095] Furthermore, the bottom of the delay dome needle 18 is arranged on the first lower fixed plate 16, and the upper end passes through the first lower ejector plate 15 to be connected to the bottom of the sprue material dome needle 17. The top of the sprue material dome needle 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 material well 101 is arranged below the single part 31.

[0096] like Figure 2 、 Figure 4 As shown, a delay space 151 is provided on the first lower ejector plate 15. The height of the delay space 151 is L, where L is the delay distance. The value of L is 5 to 8 mm. A reverse draft is performed on the first male mold core 12, that is, a water inlet cold material well 101 is provided on the first male mold core 12. Figure 3 As shown, the cross-section of the sprue cold material well 101 is an inverted trapezoidal structure, the angle between the hypotenuse of the inverted trapezoidal structure and the vertical direction is 5 to 10 degrees, and the depth of the sprue cold material well 101 is 3 to 5 mm. The purpose of setting the sprue cold material well 101 is to increase the pulling force of the flow channel, first push out the single part 31, and in the process of pushing out, pull the single part 31 apart from the flow channel entry point, and after pushing out 5 to 8 mm, push the flow channel out together to a removable distance.

[0097] 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 mold plate 23, a second upper ejector plate 24, a second lower ejector plate 25, a second lower fixed plate 26, a dome pin 27, and a second sleeve pin 28. The second male mold core 22, the second male mold plate 23, the second upper ejector plate 24, the second lower ejector plate 25, and the second lower fixed plate 26 are arranged in sequence from top to bottom. The second positioning post 21 passes through the second male mold core 22 and its bottom end abuts the top of the second male mold plate 23. The top end of the second positioning post 21 extends above the second male mold core 22. The profiling jig 4 is positioned on the two-shot mold 2 by the second positioning post 21. The top of the dome pin 27 extends into the second male mold core 22. The dome 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 sleeve pin 28 extends into the second male mold plate 23 and the second upper ejector plate 24. A third spring 241 is arranged between the second male plate 23 and the second upper ejector plate 24. When the second male plate 23 moves close to the second upper ejector plate 24, the entire plate 3 is ejected by the dome pin 27, and the third spring 241 is compressed. In the natural state, the third spring 241 can elastically push the second male plate 23 to the initial position.

[0098] like Figure 8 As shown, the profiling jig 4 includes a connecting plate 41, a fixed main board 42, a lower fixing plate 43 for the ejector, an upper fixing plate 44 for the ejector, an ejector 441, a guide shaft 442, a connecting column 425, a profiling jig fixing plate 45, a jig plate 46, a cylinder 47 and a suction cup assembly 48. The connecting plate 41, the fixed main board 42, the lower fixing plate 43 for the ejector, the upper fixing plate 44 for the ejector, the profiling jig fixing plate 45 and the jig plate 46 are arranged in sequence. The connecting plate 41 and the fixed main board A first pad column 413 is arranged between the plates 42, and both ends of the first pad column 413 are arranged with wire screw sleeves 4131. One end of the first pad column 413 is detachably fixed to the connecting plate 41 by a first screw 411, and the other end of the first pad column 413 is detachably fixed to the fixed 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 profiling jig fixing plate 45.

[0099] The fixed main board 42 is provided with a plurality of first linear bearings 421, a second linear bearing 422 and a third linear bearing 423, preferably four first linear bearings 421 and four second linear bearings 422. One end of the guide shaft 442 is provided on the profiling 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 mounted on the guide shaft 442, and the first spring 4411 is located between the profiling jig fixing plate 45 and the first linear bearing 421.

[0100] Furthermore, one end of the connecting column 425 is fixed on the profiling jig fixing plate 45, and the other end of the connecting column 425 passes through the fixed main board 42 and is limited by the protrusion at the end. A second spring 4421 is mounted on the connecting column 425 and the second spring 4421 is located between the fixed main board 42 and the profiling jig fixing plate 45. The second spring 4421 is always in a compressed state.

[0101] Specifically, a plunger 424 is provided on the side of the lower fixing plate 43 of the ejector 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 441 is arranged on the upper fixing plate 44 of the ejector and contacts the end of the plunger 424 facing away from the fixed main plate 42. The lower fixing plate 43 of the ejector and the upper fixing plate 44 of the ejector are connected by a second pad 426. The other end of the ejector 441 passes through the upper fixing plate 44 of the ejector and the profiling jig fixing plate 45 in sequence and extends into the jig plate 46. When the cylinder 47 retracts, it can drive the upper fixing plate 44 of the ejector to move close to the profiling jig fixing plate 45 and the jig plate 46, and the ejector 441 presses on the single part 31, so that the single part 31 falls off and is then accurately placed on the required position of the plate; when the cylinder 47 extends, the upper fixing plate 44 of the ejector moves away from the profiling jig fixing plate 45 and the jig plate 46, and the ejector 441 moves in the direction away from the jig plate 46.

[0102] Furthermore, the fixed main board 42 has a plurality of positioning holes, and the positioning holes are provided 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 column 11 and be positioned on the first-shot mold 1, or to match the second positioning column 21 and be positioned on the second-shot mold 2, so as to pick up a single part 31 or place a single part 31 in the cavity.

[0103] The present invention also provides a mold, which adopts the plate toy product injection molding method to achieve multiple injection molding of the plate toy, and preferably adopts the plate toy product injection molding method to achieve secondary injection molding of the plate toy.

[0104] The working principle of the profiling fixture in the present invention is as follows:

[0105] The profiling jig 4 is provided with an ejector pin 441, which ejects a single part 31, allowing for more precise placement of the single part 31. Specifically, the profiling jig fixing plate 45 is provided with a suction cup assembly 48 and an air 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 air suction connection hole 451 is connected to the suction cup, which can be sucked by controlling suction or blowing.

[0106] First, control the suction cup to release, and then control the ejector pin 441 to be ejected so that the single part 31 can be accurately placed at the required position on the plate. The ejector pin corresponds to the single part 31. Preferably, one part corresponds to 1 to 3 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 the position of the part, so that the single part 31 can be placed parallel or stably on the two-shot mold 2.

[0107] The ejection action principle of ejector 441 is as follows: ejector 441 is mounted on ejector upper fixing plate 44. When cylinder 47 retracts, it drives ejector upper fixing plate 44 to move closer to profiling jig fixing plate 45 and jig plate 46, thereby driving ejector 441 toward jig plate 46 to realize the ejection action of single part 31.

[0108] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0109] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A method for injection molding a panel toy product, characterized in that: The steps include: Step 1: First, a first portion is formed on a first shot mold (1) to form a single part (31); Step 2: Picking up the single part (31) by a profiling jig (4); Step 3: Assembling the profiling jig (4) with the single part (31) into the two-shot mold (2) and positioning the single part (31) by positioning the profiling jig (4); Step 4: Using the two-shot mold (2), a second portion (32) is molded on the single part (31) to form the entire panel (3).

2. The method for injection molding a panel toy product according to claim 1, wherein: The first-shot mold (1) is provided with a first positioning column (11), and the second-shot mold (2) is provided with a second positioning column (21); the profiling jig (4) is positioned on the first-shot mold (1) and the second-shot mold (2) respectively via the first positioning column (11) and the second positioning column (21).

3. The method for injection molding a panel toy product according to claim 2, wherein: The first positioning column (11) and the second positioning column (21) are both made of iron.

4. The method for injection molding a panel toy product according to claim 2, wherein: The profiling jig (4) has positioning holes corresponding to the first positioning column (11) and the second positioning column (21), and the positioning holes are provided with second linear bearings (422).

5. The method for injection molding a panel toy product according to claim 1, wherein: The two-shot mold (2) has a cavity for accommodating the single part (31), and the profiling jig (4) places the single part (31) in the cavity through its own ejector pin (441).

6. The method for injection molding a panel toy product according to claim 5, characterized in that: Each of the single parts (31) corresponds to one ejector pin (441) or a plurality of ejector pins (441). Preferably, the plurality of ejector pins (441) are symmetrically arranged.

7. The method for injection molding a panel toy product according to claim 5, wherein: The position of the single part (31) in the first-shot mold (1) corresponds to the position in the second-shot mold (2), so that the single part (31) picked up by the profiling jig (4) positioned on the first-shot mold (1) can be placed in the mold cavity when it is positioned on the second-shot mold (2).

8. The method for injection molding a panel toy product according to claim 1, wherein: The profiling jig (4) picks up the single part (31) via a suction cup.

9. The method for injection molding a panel toy product according to claim 1, wherein: The contouring tool is driven by a robot.

10. A mold, characterized in that: The plate toy product injection molding method according to any one of claims 1 to 9 is used to realize multiple injection molding of the plate toy.

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