Molding height tolerance automatic compensation mechanism for embedded iron part

Abstract

The utility model discloses an embedded iron part forming height tolerance automatic compensation mechanism, relates to the technical field of electronic component injection molding processing, and solves the problems that plastic burrs are easily caused or iron parts are crushed due to the height tolerance of the iron parts during rubber coating injection molding of plastic iron-coated part type products, and the embedded iron part forming height tolerance automatic compensation mechanism comprises a pressure spring, the insert can float up and down, and the insert can abut against the upper end face of the iron piece under the action of the pressure spring; and the guide mechanism is arranged on the insert so as to guide the up-and-down movement of the insert. Under the action of the pressure spring, the insert can float up and down, the lower end of the insert is always in contact with the upper end of the iron part, and when the height tolerances of the iron part are different, tolerance compensation glue sealing is automatically carried out by utilizing the floating principle of the insert, so that the problem that a plastic part is easy to generate burrs is avoided, the insert can be prevented from crushing the iron part, and the service life of the insert is prolonged. And the forming quality of the product is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic component injection mould processing technical field, especially a kind of embedding iron piece forming height tolerance automatic compensation mechanism. BACKGROUND

[0002] As Figure 8 As shown in figure, there is a kind of plastic package iron piece type product in existing electronic component, iron piece is embedded in plastic piece using injection mold.The iron piece is positioned in the injection mold, in order to prevent plastic from entering the inside of iron piece when injection molding, a piece of insert will be placed on the top of iron piece, the upper end of insert will be fixedly installed on the upper mold, when the upper mold and the lower mold are covered, the lower end of insert will be in contact with the upper end of iron piece, covering the upper end of iron piece, to prevent plastic from entering the inside of iron piece.Iron piece may have different height tolerances in the process of production and processing, that is, the height of some iron pieces is larger, and the height of some iron pieces is smaller.Iron pieces are not uniform in height.If the height of iron piece is too large, iron piece is easy to be damaged when insert is pressed down.If the height of iron piece is too small, insert may not reach iron piece when pressed down, and there will be a small gap between insert and iron piece, so plastic will enter the inside of iron piece through the gap when injection molding, and burr will be generated when plastic piece is injection molded.The above two cases will have adverse effects on product quality CONTENT

[0003] The utility model aims at solving the above problems, and designs a kind of embedding iron piece forming height tolerance automatic compensation mechanism, solve the problem that plastic package iron piece type product iron piece is easy to be damaged or cause plastic burr when encapsulating injection molding due to the height tolerance of iron piece.

[0004] The technical scheme of the utility model for achieving the above-mentioned purpose is a kind of embedding iron piece forming height tolerance automatic compensation mechanism, which is used for compensating the height tolerance of iron piece embedded in product when product is injection molded, and includes:

[0005] Pressure spring;

[0006] Insert, the insert can float up and down, and the insert can be in contact with the upper end surface of iron piece under the action of pressure spring;

[0007] Guide mechanism, the guide mechanism is arranged on the insert to guide the up-and-down movement of the insert.

[0008] Preferably, the upper surface of the insert has a receiving groove for accommodating the pressure spring, the lower end of the pressure spring is in contact with the bottom surface of the receiving groove, and the upper end of the pressure spring extends out of the receiving groove.

[0009] Preferably, the pressure spring is a flat spring.

[0010] Further, the lower end surface of the flat spring is a plane and is in contact with the bottom surface of the accommodating groove.

[0011] Further, a guide piece is fixedly connected to the lower end of the flat spring, and the guide piece is in up-down sliding connection with the accommodating groove.

[0012] Preferably, the outer diameter of the flat spring is matched with the inner diameter of the accommodating groove, and a guide surface capable of being in up-down sliding contact with the accommodating groove is formed on the outer circumferential surface of the flat spring.

[0013] Preferably, a guide hole is formed in the upper surface of the insert, a guide piece is in up-down sliding connection in the guide hole, and the upper end of the guide piece is fixed on the injection mold.

[0014] Further, the guide piece is a guide rod, and a plurality of guide holes are distributed along the circumferential direction of the accommodating groove, and each guide hole is in up-down sliding connection with a guide rod.

[0015] Further, the guide piece is a guide sleeve, the guide hole is an annular hole, and the guide sleeve is in up-down sliding connection with the annular hole.

[0016] Preferably, a limit protrusion is arranged on the outer edge of the insert.

[0017] Compared with the prior art, the beneficial effects are that:

[0018] In the utility model, the insert can float up and down, the lower end of the insert is always in contact with the upper end of the iron piece under the action of the pressure spring, when the height tolerances of the iron pieces are different, the insert automatically compensates for the tolerance and seals the glue by using the floating principle of the insert, the problem that the plastic piece is easy to produce burrs is avoided, the pressure spring can play a buffering role, the iron piece is prevented from being pressed by the insert, and the forming quality of the product is effectively improved through the automatic compensation mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a structure schematic view of the height tolerance automatic compensation mechanism of the embedded iron piece in embodiment 1;

[0020] Figure 2 is a structure schematic view of the height tolerance automatic compensation mechanism of the embedded iron piece when the height tolerance automatic compensation mechanism of the embedded iron piece is installed on the injection mold;

[0021] Figure 3 is a structure schematic view of the injection mold when the upper mold and the lower mold of the injection mold are removed;

[0022] Figure 4 is Figure 3 is an explosion structure schematic view of

[0023] Figure 5Schematic diagram of the cross-sectional structure of the automatic compensation mechanism for the height tolerance of the embedded iron piece in Example 1;

[0024] Figure 6 Schematic diagram of the cross-sectional structure of the automatic compensation mechanism for the height tolerance of the embedded iron piece in Example 2;

[0025] Figure 7 Schematic diagram of the cross-sectional structure of the automatic compensation mechanism for the height tolerance of the embedded iron piece in Example 3;

[0026] Figure 8 It is a structural diagram of the prior art when the insert and the iron piece are matched.

[0027] In the figure, 1. plastic part; 2. insert; 201. guide hole; 202. annular hole; 203. receiving groove; 21. limiting protrusion; 3. iron part; 4. pressure spring; 5. upper mold; 6. lower mold; 7. upper mold core; 701. limiting cavity; 8. guide rod; 9. guide sleeve. DETAILED DESCRIPTION

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] Example 1

[0030] like Figure 1 As shown, a preferred embodiment of the present invention provides an automatic compensation mechanism for the height tolerance of an embedded iron piece. This automatic compensation mechanism is mainly used to compensate for the height of the iron piece 3 in the injection mold, so that the insert 2 can always abut against the top of the iron piece 3, sealing the top of the iron piece 3 to prevent plastic from entering the inside of the iron piece 3 during injection molding, or the insert 2 from crushing the iron piece 3. The iron piece 3 has a cylindrical structure.

[0031] refer to Figure 2 、 Figure 3 The injection mold comprises an upper mold 5 and a lower mold 6. The upper mold 5 has an upper mold core 7, and the lower mold 6 has a lower mold core. When the upper mold 5 and the lower mold 6 are closed together, a cavity for injection molding is formed between the two.

[0032] like Figure 4As shown, the tolerance automatic compensation mechanism is mainly composed of the insert 2 and the pressure spring 4, wherein the upper edge of the insert 2 is outwardly convex along the circumference to form a limiting convex 21, so that the shape of the whole insert 2 presents an inverted "convex" character. The bottom of the upper die core 7 has a limiting cavity 701, the upper end of the insert 2 is inserted into the limiting cavity 701, and the space of the limiting cavity 701 is large enough to leave enough space for the insert 2 to slide up and down. The limiting convex 21 on the outer side of the insert 2 can prevent the insert 2 from leaving the limiting cavity 701.

[0033] The upper surface of the insert 2 has a containing groove 203, the lower end of the pressure spring 4 extends into the containing groove 203 and abuts against the bottom surface of the containing groove 203, and the upper end of the pressure spring 4 extends out of the containing groove 203 and abuts against or is fixedly connected with the upper surface of the limiting cavity 701.

[0034] When the upper die 5 and the lower die 6 are closed, the lower end of the insert 2 always abuts against the upper end surface of the iron piece 3 under the action of the pressure spring 4. If the height of the iron piece 3 is too high, in order for the upper die 5 and the lower die 6 to be closed, the insert 2 can slide upward relative to the limiting cavity 701, at which time the pressure spring 4 is forced to compress. If the height of the iron piece 3 is too small, the pressure spring 4 will press the insert 2 downward, the insert 2 will slide downward relative to the limiting cavity 701, and the lower end of the insert 2 will contact the iron piece 3. In this way, the height tolerance of the iron piece 3 is automatically compensated, so as to prevent the iron piece 3 from being damaged or causing the plastic piece 1 to have burrs.

[0035] As shown in the drawings, Figure 5 In this embodiment, the pressure spring 4 is a flat spring. The outer diameter of the flat spring is matched with the inner diameter of the containing groove 203, at which time the containing groove 203 functions like a guide groove. The outer peripheral surface of the flat spring forms a guide surface, which can slide up and down relative to the containing groove 203 in the process of being forced to compress, and the position of the flat spring will not be skewed when it slides up and down.

[0036] The outer wall of the insert 2 is guided up and down by the inner wall of the upper die core 7, and the flat spring functions like a guide rod to assist the up and down movement of the insert 2, and the flat spring will not be skewed laterally.

[0037] When the lower end of the insert 2 abuts against the upper end of the iron piece 3, the insert 2 and the iron piece 3 are concentric to ensure the molding effect and quality of the plastic piece 1.

[0038] As shown in the drawings, Figure 5 The lower end surface of the flat spring is a plane, so the lower end surface of the flat spring is in plane contact with the bottom surface of the containing groove 203, at which time the contact area is the largest, the contact area of the force exerted by the flat spring on the insert 2 is the largest, and the direction of the force is more consistent.

[0039] A circular guide piece can also be connected to the lower end of the flat spring, and the thickness of the guide piece should be thick enough so that the guide piece can slide up and down relative to the receiving groove 203. The force applied by the flat spring will first act on the guide piece, and then press the insert 2 downward through the guide piece.

[0040] After the molding, the iron piece 3 is embedded in the inner side of the plastic piece 1, and the insert 2 is embedded in the upper end of the plastic piece 1. At this time, after the plastic piece 1 is molded, the insert 2 can be pulled out.

[0041] Example 2

[0042] like Figure 6 As shown, the difference between this embodiment and embodiment 1 is that the structure of the insert 2 is modified in this embodiment.

[0043] The top surface of the insert 2 is provided with a plurality of circular blind guide holes 201, evenly distributed along the circumference of the receiving groove 203. Each guide hole 201 is fitted with a guide rod 8, the length of which must not exceed the depth of the hole 201. The upper end of the guide rod 8 is fixedly mounted on the upper die 7 and can slide up and down relative to the guide hole 201. The cooperation between the guide rod 8 and the guide hole 201 ensures that the insert 2 remains concentric with the iron piece 3 during vertical movement without deflection.

[0044] The outer circumference of the insert 2 and the upper die core 7 have an up-and-down guiding effect, and the guide rod 8 and the guide hole 201 cooperate to help strengthen the guiding effect.

[0045] Example 3

[0046] like Figure 7 As shown, the difference between this embodiment and embodiment 1 is that the structure of the insert 2 is also modified. An annular hole 202 is provided on the upper surface of the insert 2, and the annular hole 202 is also a blind hole. At the same time, a guide sleeve 9 is provided in the annular hole 202. The guide sleeve 9 is cylindrical and can slide up and down relative to the annular guide hole 201. The depth of the hole must not be less than the height of the guide sleeve 9. The upper end of the guide sleeve is fixedly mounted on the upper mold core 7. The function is the same as that of the guide rod 8 in embodiment 2, which is to strengthen the guidance between the outer peripheral surface of the insert 2 and the upper mold core 7.

[0047] The above technical solutions only reflect the preferred technical solutions of the present utility model. Any changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present utility model and fall within the scope of protection of the present utility model.

Claims

1. An automatic compensation mechanism for height tolerance of embedded iron parts, used for compensating the height tolerance of the iron parts (3) embedded in the product when the product is injection molded, characterized in that, Include: A pressure spring (4); An insert (2) concentric with the iron piece (3) and capable of floating up and down, which can be in contact with the upper end surface of the iron piece (3) under the action of the pressure spring (4); A guide mechanism provided on the insert (2) to guide the up and down movement of the insert (2).

2. The automatic compensation mechanism for height tolerance of embedded iron parts forming according to claim 1, characterized in that, The upper surface of the insert (2) has a receiving groove (203) for accommodating the pressure spring (4), the lower end of the pressure spring (4) is in contact with the bottom surface of the receiving groove (203), and the upper end of the pressure spring (4) protrudes out of the receiving groove (203).

3. The automatic compensation mechanism for height tolerance of embedded iron parts forming according to claim 2, characterized in that, The pressure spring (4) is a flat spring.

4. The automatic compensation mechanism for height tolerance of embedded iron parts forming according to claim 3, characterized in that, The lower end surface of the flat spring is a plane and is in contact with the bottom surface of the receiving groove (203).

5. The automatic compensation mechanism for height tolerance of a molded embedded iron part according to claim 3, characterized in that, The lower end of the flat spring is fixedly connected with a guide piece, which is in sliding connection with the receiving groove (203) up and down.

6. The automatic compensation mechanism for height tolerance of a molded embedded iron part according to claim 4 or 5, characterized in that, The outer diameter of the flat spring is matched with the inner diameter of the receiving groove (203), and a guide surface capable of sliding contact with the receiving groove (203) up and down is formed on the outer peripheral surface of the flat spring.

7. The automatic compensation mechanism for height tolerance of a molded embedded iron part according to claim 2, characterized in that, The upper surface of the insert (2) is provided with a guide hole (201), and a guide piece is in sliding connection with the guide hole (201) up and down, and the upper end of the guide piece is fixed on the injection mold.

8. The automatic compensation mechanism for forming height tolerance of embedded iron part according to claim 7, characterized in that, The guide piece is a guide rod (8), and a plurality of guide holes (201) are distributed along the circumferential direction of the receiving groove (203), and each guide hole (201) is in sliding connection with a guide rod (8) up and down.

9. The automatic compensation mechanism for height tolerance of a molded embedded iron part according to claim 7, characterized in that, The guide piece is a guide sleeve (9), the guide hole (201) is an annular hole (202), and the guide sleeve (9) is in sliding connection with the annular hole (202) up and down.

10. The automatic compensation mechanism for height tolerance of a molded embedded iron part according to claim 1, characterized in that, The outer edge of the insert (2) is provided with a ring of limiting protrusions (21).

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