PIN in-mold placing structure, injection mold of coil support and injection molding method

Abstract

The invention provides a PIN in-mold placing structure, an injection mold of a coil support and an injection molding method, the PIN in-mold placing structure comprises a movable mold core plate, an imbedding insert and a positioning sliding block, the movable mold core plate is provided with a mounting hole matched with the imbedding insert, the imbedding insert is inserted into the mounting hole of the movable mold core plate, and the positioning sliding block is arranged in the imbedding insert. An insertion hole is formed in the imbedding insert, and a first pin rod of a PIN is inserted into the insertion hole; the positioning sliding block can slide laterally so as to be close to or far away from the movable mold core plate; and the positioning slide block is provided with a positioning hole for inserting a second pin rod of the PIN. When the PIN is put in, the PIN is inserted into the insert, and then the insert is inserted into the mounting hole of the movable mold core plate, so that the manual operation of an operator is facilitated, and the manual placement of the PIN is quicker and more accurate.

Description

Technical Field

[0001] The invention relates to the field of mold injection, and in particular to an injection mold and an injection molding method for a PIN needle mold placement structure and a coil support. Background Art

[0002] The coil support is a frame for winding electromagnetic coils. After the coil is wound, it needs to be connected to an external circuit. Therefore, in the prior art, a PIN pin is generally integrally formed on the coil support by in-mold injection molding, and the coil is electrically connected to the PIN pin after winding. Figure 1 The coil support 1 shown has two L-shaped PIN needles 2; Figure 2 As shown, the PIN needle 2 has a first needle rod 3 and a second needle rod 4 that are perpendicular to each other. During injection molding, the PIN needle 2 needs to be placed into the mold first. However, due to the small size of the PIN needle 2, it is currently difficult to automatically place it, and it can only be placed manually. However, the manual operation is also difficult, and it is also difficult for the operator to quickly insert the small PIN needle 2 directly into the mold; the placement time is long, the plastic is easy to carbonize, and the product defect rate is high. Therefore, it is necessary to re-create a mold structure suitable for manual fast and accurate placement of this type of PIN needle. Summary of the invention

[0003] Therefore, in order to solve the above problems, the present invention provides an injection mold and an injection molding method for a PIN needle mold placement structure and a coil support.

[0004] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0005] A PIN pin mold placement structure, the PIN pin has a first needle rod and a second needle rod perpendicular to each other; wherein the PIN pin mold placement structure includes a movable mold core plate, an inserted insert and a positioning slider, the movable mold core plate is provided with a mounting hole adapted to the inserted insert, the inserted insert is inserted into the mounting hole of the movable mold core plate, the inserted insert is provided with a plug hole for inserting the first needle rod of the PIN pin; the positioning slider can be laterally slidable to approach or move away from the movable mold core plate; the positioning slider is provided with a positioning hole for inserting the second needle rod of the PIN pin.

[0006] Furthermore, the insert includes a first part and a second part, and the first part and the second part are spliced ​​and fixed to each other and together constitute the insertion hole.

[0007] Furthermore, a raised boss is provided on the first part, and a recess matched with the boss is provided on the second part, and the boss of the first part is snap-fitted into the recess of the second part to achieve splicing and fixation; the boss serves as the bottom of the socket.

[0008] Furthermore, a raised positioning rib is provided on one side of the inserted component, and a positioning recess for cooperating with the positioning rib is provided on one side wall of the mounting hole of the movable mold core plate; the positioning rib is engaged in the positioning recess.

[0009] Furthermore, the positioning slider includes a slider body and an assembly block, the surface of the slider body has a positioning groove, the assembly block is detachably assembled on the slider body, and together they constitute the positioning hole; the positioning groove serves as a part of the positioning hole.

[0010] A coil support injection mold comprises a static mold part and a dynamic mold part, wherein the static mold part comprises a static mold and a static mold core assembled on the static mold, and the dynamic mold part comprises a dynamic mold and a dynamic mold core assembled on the dynamic mold, wherein the static mold and the dynamic mold are closed and enclosed to form a molding cavity; wherein the dynamic mold core comprises the above-mentioned PIN needle mold placement structure.

[0011] Furthermore, a matching groove is provided on the positioning slide block, an elastic protrusion is provided on an opposite side wall of the matching groove, a first shovel base is provided on the static mold, guide slopes are provided on two sides of the first shovel base facing the inner side of the molding cavity, and no guide slopes are provided on two sides of the first shovel base facing away from the outer side of the molding cavity; when the static mold and the dynamic mold are closed, the guide slopes on the two inner sides of the first shovel base abut against and cooperate with the elastic protrusion to drive the elastic protrusion to retract until the first shovel base is completely inserted into the matching groove; when the static mold and the dynamic mold are opened, the outer side of the first shovel base abuts against the elastic protrusion and drives the positioning slide block away from the dynamic mold core plate.

[0012] Furthermore, the movable mold core also includes a forming slider, which is arranged on the opposite side of the positioning slider. A second shovel base is arranged on the static mold, and the second shovel base cooperates with the forming slider to drive the forming slider to approach or move away from the movable mold core plate.

[0013] A method for injection molding a coil support comprises the following steps:

[0014] S1, providing the injection mold of the coil support described above, and manually inserting a PIN needle into the insert;

[0015] S2, manually insert the insert into the mounting hole of the movable mold plate and press it into place, so that the second needle rod of the PIN needle faces the positioning slider;

[0016] S3, the positioning slide block moves toward the movable mold plate, so that the second needle rod of the PIN needle is inserted into the positioning hole;

[0017] S4, the static mold and the movable mold are combined for injection molding to obtain a finished coil support.

[0018] Furthermore, in step S2, the positioning slider includes a slider body and an assembly block, and the surface of the slider body has a positioning groove; the slider body first moves toward the movable mold plate to insert the second needle rod of the PIN needle into the positioning groove, and then the assembly block is assembled on the slider body to realize the positioning of the PIN needle.

[0019] Furthermore, two groups of movable mold parts are provided, which cooperate with the static mold parts alternately.

[0020] The technical solution provided by the present invention has the following beneficial effects:

[0021] 1. By setting the insertion insert method, when performing the insertion operation, first insert the PIN into the insertion insert, and then insert the insertion insert into the mounting hole of the dynamic mold plate. This method is convenient for the operator to operate manually, making the manual insertion of the PIN needle faster and more accurate.

[0022] 2. Set up the structure of the positioning slider. After the insert is inserted into the mounting hole of the movable mold plate, the second needle rod of the PIN needle is fixed by lateral sliding of the positioning slider.

[0023] 3. The insert includes a first part and a second part. The boss of the first part is snap-fitted into the notch of the second part to achieve splicing and fixing, so as to achieve splicing and assembly of the insert, which is more conducive to processing. The boss is the bottom of the jack, and when the first needle rod of the PIN is inserted and abuts on the boss, it means that the insertion is in place.

[0024] 4. A raised positioning rib is provided on one side of the inserted part, and a positioning recess for cooperating with the positioning rib is provided on one side wall of the mounting hole of the movable mold core plate; the positioning rib is engaged in the positioning recess to form an asymmetric assembly structure on both sides to prevent the operator from installing it upside down.

[0025] 5. The positioning slider includes a slider body and an assembly block, the surface of the slider body has a positioning groove, the assembly block can be detachably assembled on the slider body, and together constitute the positioning hole; the positioning groove serves as a part of the positioning hole; when the slider body is close to the movable mold plate, the second needle rod of the PIN needle is first inserted into the positioning groove, because the positioning groove has an open mouth, it can avoid the problem that the PIN needle cannot be inserted into the positioning slider when it is not assembled in place, causing the positioning slider to hit and eventually cause deformation; then the assembly block is covered, and the PIN needle that is not installed in place can be pressed into place. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic diagram of the structure of the coil support;

[0027] Figure 2 Shown is a schematic diagram of the structure of a PIN needle;

[0028] Figure 3 The figure shows a schematic diagram of the structure of the insert in the embodiment;

[0029] Figure 4 The figure shows a schematic diagram of the structure of the insert in the embodiment;

[0030] Figure 5 The figure is a schematic diagram of the structure of the PIN needle inserted into the insert in the embodiment;

[0031] Figure 6 The structure of the PIN needle mold placement structure in the embodiment is shown as follows Figure 1 ;

[0032] Figure 7 Shown Figure 6 A magnified schematic diagram of the middle A area;

[0033] Figure 8 The structure of the PIN needle mold placement structure in the embodiment is shown as follows Figure 2 ;

[0034] Fig. 9 Shown Figure 8 A magnified schematic diagram of the middle B area;

[0035] Fig.10 The figure shows a schematic diagram of the structure of the injection mold of the coil support in the embodiment when the mold is opened;

[0036] Fig.11 The figure shows a schematic structural diagram of the coil support after the injection mold of the embodiment hides the front mold structure;

[0037] Fig.12 Shown Fig.11 Enlarged schematic diagram of the middle C area;

[0038] Fig.13 The structure of the first shovel base in the embodiment is shown as follows: Figure 1 ;

[0039] Fig.14 The structure of the first shovel base in the embodiment is shown as follows: Figure 2 . DETAILED DESCRIPTION

[0040] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0041] In the description of the present invention, terms such as "up", "down", "left", "right", "front", "back", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying 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 of the present invention.

[0042] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0043] This embodiment provides a PIN needle mold placement structure, referring to Figure 2 As shown, the PIN needle 2 has a first needle rod 3 and a second needle rod 4 that are perpendicular to each other; wherein, continue to refer to Figures 3 to 9 As shown, the PIN pin mold placement structure includes a movable mold core plate 20, an insert 10 and a positioning slider 30. The movable mold core plate 20 is provided with a mounting hole 21 adapted to the insert 10. Specifically, the cross-section of the insert 10 and the mounting hole 21 is roughly a rectangular structure, so that the insert 10 can be installed in the mounting hole 21. The insert 10 is inserted into the mounting hole 21 of the movable mold core plate 20. The insert 10 is provided with a plug hole 101 for inserting the first needle rod 3 of the PIN pin 2; the positioning slider 30 can be slid laterally to approach or move away from the movable mold core plate 20; specifically, the lateral sliding refers to the sliding perpendicular to the insertion direction of the insert 10. The positioning slider 30 is provided with a positioning hole for inserting the second needle rod 4 of the PIN pin 2.

[0044] That is, when performing the insertion operation, first insert the PIN needle 2 into the insertion insert 10. This operation is not limited to time and place, and the plugging operation is simple. Then, insert the insertion insert 10 into the mounting hole 21 of the movable mold core plate 20. In this way, the insertion insert 10 increases the volume, which is convenient for the operator to manually operate, making the manual insertion of the PIN needle 2 faster and more accurate. Afterwards, the second needle rod 4 of the PIN needle 2 is fixed by sliding the positioning slide block 30 sideways; so as to complete the in-mold placement of the PIN needle 2.

[0045] Furthermore, in this embodiment, the insert 10 includes a first part 11 and a second part 12, which are spliced ​​and fixed to each other and together constitute the socket 101; by splicing the two parts, the components of the socket 101 can be processed in their respective areas, and after splicing, they together constitute the socket 101, which is more conducive to processing.

[0046] The first part 11 is provided with a raised boss 111, and the second part 12 is provided with a recess 121 adapted to the boss 111. The boss 111 of the first part 11 is snap-fitted into the recess 121 of the second part 12 to achieve splicing and fixation; the boss 11 serves as the bottom of the jack 101. In this way, the assembly and fixation of the first part 11 and the second part 12 are ensured, and the insertion limit of the PIN needle 2 is achieved, with a simple structure and ingenious design.

[0047] At the same time, in order to prevent the insert 10 from being reversely installed into the movable mold core plate 20, a foolproof structure is provided in this embodiment, which is specifically: a raised positioning rib 13 is provided on one side of the insert 10, and a positioning recess 22 for matching with the positioning rib 13 is provided on one side wall of the mounting hole 21 of the movable mold core plate 20; the positioning rib 13 is matched in the positioning recess 22. In this way, when reversely installed, the positioning rib 13 cannot be aligned with the positioning recess 22, resulting in failure to install, thereby preventing operators from installing reversely.

[0048] The above-mentioned structural design for the insert 10 is one of the more preferred solutions. Of course, in other embodiments, the structure of the insert 10 is not limited thereto. For example, the insert 10 can also be an integral structure, and the socket 101 is obtained by drilling. For example, the cross-section of the insert 10 and the mounting hole 21 can also be a triangle, trapezoid, etc., which can prevent reverse installation, and so on.

[0049] Continue to refer to Figures 10 to 14 As shown, the present embodiment further provides an injection mold for a coil bracket, comprising a static mold part 100 and a dynamic mold part 200, wherein the static mold part 100 comprises a static mold and a static mold core 50 assembled on the static mold, and the dynamic mold part 200 comprises a dynamic mold and a dynamic mold core assembled on the dynamic mold, and the static mold and the dynamic mold are closed together so that the static mold core 50 and the dynamic mold core are closed and enclosed to form a molding cavity; wherein the dynamic mold core comprises the above-mentioned PIN pin mold placement structure; specifically, the dynamic mold core plate 20 is fixed on the dynamic mold, and the positioning slider 30 is slidably assembled on the dynamic mold.

[0050] This embodiment also provides a method for injection molding a coil support, comprising the following steps:

[0051] S1, providing the injection mold of the coil support described above, and manually inserting the PIN needle 2 into the insert 10;

[0052] Specifically, the first needle rod 3 of the PIN needle 2 is inserted into the insertion hole 101 of the insert 10. The side surface of the insert 10 is provided with a marking pattern 102 for the operator to refer to, effectively preventing the PIN needle 2 from being inserted in reverse.

[0053] S2, manually insert the insert 10 into the mounting hole 21 of the movable mold plate 20 and press it into place, so that the second needle rod 4 of the PIN needle 2 faces the positioning slider 30;

[0054] Specifically, in this embodiment, after the insert 10 is inserted into the mounting hole 21 of the movable mold plate 20, in order to avoid inadequate insertion, a positioning fixture is used in this embodiment to press the installed PIN needle 2 downward, which can effectively press the installed PIN needle 2 into place.

[0055] S3, the positioning slide block 30 moves toward the movable mold plate 20, so that the second needle rod 4 of the PIN needle 2 is inserted into the positioning hole;

[0056] In this step, the positioning slider 30 can be driven by manual operation.

[0057] Further preferably, the positioning slider 30 includes a slider body 31 and an assembly block 32. The surface of the slider body 31 has a positioning groove 33. The assembly block 32 is detachably assembled on the slider body 31 and together constitutes the positioning hole. The positioning groove 33 is a part of the positioning hole, that is, when the assembly block 32 is assembled on the slider body 31, the assembly block 32 and the positioning groove 33 together constitute the positioning hole. When operating, remove the assembly block 32, the slider body 31 first moves toward the movable mold plate 20, and the second needle rod 4 of the PIN needle 2 is inserted into the positioning groove 33. Since the positioning groove 33 has an open mouth, as shown in FIG. Fig. 9 The PIN pin 2 is not properly assembled and cannot be inserted into the positioning slide block 30, which causes the PIN pin 2 to abut against the positioning slide block 30 and eventually deforms. That is, the height of the PIN pin 2 will be too high when it is not properly assembled. If the complete positioning slide block 30 is slid in at this time, the second needle rod 4 of the PIN pin 2 cannot be accurately aligned with the positioning hole, and thus will abut against the positioning slide block 30, eventually causing the PIN pin 2 to deform. However, by adopting the matching structure of the slider body 31 and the assembly block 32, the slider body 31 slides in alone, and even if the PIN pin 2 is not properly assembled, after sliding in, the second needle rod 4 of the PIN pin 2 is located above the open mouth of the positioning groove 33 and will not abut against the slider body 31. After that, the assembly block 32 is covered, and the PIN pin 2 that is not properly assembled can continue to be pressed into place. This greatly improves the fault tolerance of manual operation.

[0058] S4, the static mold and the dynamic mold are combined for injection molding to obtain Figure 1 The finished coil support is shown.

[0059] Specifically, in this embodiment, two groups of movable mold parts 200 are provided, one supporting two, and they are alternately coordinated with the static mold part 100, that is, one group performs the operation of manually inserting the PIN needle 2, and after the insertion is completed, it switches to the static mold part 100 for injection molding, and then the second movable mold part 200 performs the operation of inserting the PIN needle 2, and the alternating reciprocating is performed to improve efficiency. Of course, the number of movable mold parts 200 can also be one or two.

[0060] Furthermore, in this embodiment, since the positioning slider 30 has a manual sliding operation, it needs to be linked with the front mold when the product is completed and demolded; to achieve this function, in this embodiment, the positioning slider 30 (specifically the slider body 31) is provided with a matching slide 311, and the matching slide 311 is open in the outer direction away from the molding cavity (also away from the movable mold core plate 20), which plays a role of giving way. An elastic protrusion 34 is provided on one of the opposite side walls of the matching slide 311, and specifically, the elastic protrusion 34 includes a latch and a spring, and the latch and the spring are inserted into the hole of the side wall of the matching slide 311. The static mold is provided with a first shovel base 35, and the first shovel base 35 is provided with guiding inclined surfaces 353 on both sides of the inner side 352 facing the molding cavity, and the first shovel base 35 is not provided with guiding inclined surfaces on both sides of the outer side 351 away from the molding cavity; when the static mold and the dynamic mold are closed, the guiding inclined surfaces 353 on both sides of the inner side 352 of the first shovel base 35 abut against the elastic protrusion 34 to drive the elastic protrusion 34 to retract until the first shovel base 35 is completely inserted into the matching slide groove 311, as shown in FIG. Fig.11 In the state shown, after being inserted, the elastic protrusion 34 is restricted to the outer side 351 of the first shovel base 35; when the static mold and the movable mold are opened, the outer side 351 of the first shovel base 35 abuts against the elastic protrusion 34 and drives the positioning slider 30 away from the movable mold core plate 20, that is, the outer side of the first shovel base is not provided with a guide slope, and the elastic protrusion 34 cannot be driven to retract and give way. As the static mold is separated, the first shovel base 35 can drive the positioning slider 30 away from the movable mold core plate 20 to achieve mold opening. Such a setting has a simple and ingenious structural design.

[0061] Furthermore, since the coil support 1 is a hollow structure, the hollow part in the middle thereof needs to be inserted with a forming column, and it also needs to be pulled out laterally when demolding. Therefore, in this embodiment, a forming slider 41 is also provided, and the forming slider 41 is provided on the opposite side of the positioning slider 30, and a second shovel base 42 is provided on the static mold. Specifically, in this embodiment, the second shovel base 42 is an obliquely arranged round rod, and the second shovel base 42 cooperates with the forming slider 41 to drive the forming slider 41 close to or away from the movable mold core plate 20. When closing the mold, the second shovel base 42 drives the forming slider 41 close to the movable mold core plate 20, and when opening the mold, the second shovel base 42 drives the forming slider 41 away from the movable mold core plate 20 to achieve lateral demolding.

[0062] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A PIN needle mold placement structure, the PIN needle has a first needle rod and a second needle rod perpendicular to each other; characterized in that: The PIN pin mold placement structure includes a movable mold plate, an inserted insert and a positioning slider. The movable mold plate is provided with a mounting hole that is compatible with the inserted insert. The inserted insert is inserted into the mounting hole of the movable mold plate. The inserted insert is provided with a plug hole for inserting the first needle rod of the PIN pin; the positioning slider can be slid laterally to approach or move away from the movable mold plate; the positioning slider is provided with a positioning hole for inserting the second needle rod of the PIN pin.

2. The PIN needle mold placement structure according to claim 1, characterized in that: The insert comprises a first part and a second part, wherein the first part and the second part are spliced ​​and fixed to form the insertion hole.

3. The PIN needle mold placement structure according to claim 2, characterized in that: The first part is provided with a raised boss, the second part is provided with a recess matched with the boss, the boss of the first part is snap-fitted into the recess of the second part to achieve splicing and fixation; the boss serves as the bottom of the jack.

4. The PIN needle mold placement structure according to claim 1, characterized in that: A raised positioning rib is provided on one side of the insert, and a positioning recess for cooperating with the positioning rib is provided on one side wall of the mounting hole of the movable mold core plate; the positioning rib is engaged in the positioning recess.

5. The PIN needle mold placement structure according to claim 1, characterized in that: The positioning slider includes a slider body and an assembly block. The surface of the slider body has a positioning groove. The assembly block is detachably assembled on the slider body and together they form the positioning hole. The positioning groove serves as a part of the positioning hole.

6. An injection mold for a coil support, comprising a static mold part and a dynamic mold part, wherein the static mold part comprises a static mold and a static mold core assembled on the static mold, and the dynamic mold part comprises a dynamic mold and a dynamic mold core assembled on the dynamic mold, wherein the static mold and the dynamic mold are closed and enclosed to form a molding cavity; characterized in that: The movable mold core includes the PIN pin mold placement structure described in any one of claims 1 to 5 above.

7. The injection mold of the coil support according to claim 6, characterized in that: The positioning slide block is provided with a matching slide groove, an elastic protrusion is provided on an opposite side wall of the matching slide groove, and a first shovel base is provided on the static mold, and guide inclined surfaces are provided on two sides of the first shovel base facing the inner side of the molding cavity, and no guide inclined surfaces are provided on two sides of the first shovel base facing away from the outer side of the molding cavity; when the static mold and the dynamic mold are closed, the guide inclined surfaces on the two inner sides of the first shovel base abut against and cooperate with the elastic protrusion to drive the elastic protrusion to retract and give way until the first shovel base is completely inserted into the matching slide groove; when the static mold and the dynamic mold are opened, the outer side of the first shovel base abuts against the elastic protrusion and drives the positioning slide block away from the dynamic mold core plate.

8. The injection mold of the coil support according to claim 6, characterized in that: The movable mold core also includes a forming slider, which is arranged on the opposite side of the positioning slider. A second shovel base is arranged on the static mold, and the second shovel base cooperates with the forming slider to drive the forming slider to approach or move away from the movable mold core plate.

9. A method for injection molding a coil support, characterized in that: The steps include: S1, providing an injection mold of the coil support according to any one of claims 6 to 8, and manually inserting a PIN needle into the insert; S2, manually insert the insert into the mounting hole of the movable mold plate and press it into place, so that the second needle rod of the PIN needle faces the positioning slider; S3, the positioning slide block moves toward the movable mold plate, so that the second needle rod of the PIN needle is inserted into the positioning hole; S4, the static mold and the movable mold are combined for injection molding to obtain a finished coil support.

10. The method for injection molding a coil support according to claim 9, characterized in that: In step S2, the positioning slider includes a slider body and an assembly block, and the surface of the slider body has a positioning groove; the slider body first moves toward the movable mold plate to insert the second needle rod of the PIN needle into the positioning groove, and then the assembly block is assembled on the slider body to realize the positioning of the PIN needle.

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