Pin lifting mechanism and forming die

Abstract

The utility model provides an ejector pin mechanism and a forming die, the die layout difficulty can be reduced, the die opening stability can be improved, the ejector pin mechanism is applied to the forming die comprising an upper die mechanism and a lower die mechanism which are matched in an opening and closing mode, the ejector pin mechanism comprises an ejector pin base, a first protruding body and a second protruding body, and the base is provided with a containing groove; the containing groove comprises a first groove wall, a bottom wall and a second groove wall which are sequentially connected, the first groove wall and the second groove wall are oppositely arranged in the first direction perpendicular to the mold opening direction, the first protruding body is arranged on the first groove wall, and the second protruding body is arranged on the second groove wall and located between the first protruding body and the bottom wall in the mold opening direction; and the pin lifting piece comprises a supporting body and an angle pin body, the supporting body movably penetrates through the containing groove and abuts against the sides, facing the bottom wall, of the first protruding body and the second protruding body at the same time, the angle pin body is obliquely arranged relative to the supporting body and connected with the supporting body, and the end, away from the supporting body, of the angle pin body movably penetrates through the lower die mechanism.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding technical field especially relates to a top pin mechanism and forming die. BACKGROUND

[0002] At present, in the field of plastic mold design, the inclined pin mechanism is the key component to realize the demolding of complex products. However, due to the relatively wide width and large size of the traditional T-shaped rod type, double-sided T-groove type and roller type inclined pin, it is often difficult to layout under the condition of limited mold space. In addition, although the single-sided T-groove type inclined pin is relatively easy to layout, its strength and stability are insufficient, especially under high temperature forming conditions, the imbalance of inclined pin movement is easy to cause its fracture, and further cause the phenomenon of jamming of the mold in the process of opening the mold and ejecting the product, which seriously affects the service life and production efficiency of the mold. SUMMARY

[0003] In view of the above situation, it is necessary to provide a top pin mechanism and a forming die to reduce the difficulty of mold layout and improve the opening stability.

[0004] The embodiment of the application provides a top pin mechanism applied to a forming die for injection molding a product with a reverse buckle structure, the forming die comprises an upper die mechanism and a lower die mechanism matched with each other, and the top pin mechanism comprises:

[0005] A top pin seat comprising a seat body, a first protruding body and a second protruding body, the seat body is provided with a receiving groove, the receiving groove comprises a first groove wall, a bottom wall and a second groove wall connected in sequence, the first groove wall and the second groove wall are oppositely arranged along a first direction perpendicular to the opening direction, the first protruding body is arranged on the first groove wall, and the second protruding body is arranged on the second groove wall and located between the first protruding body and the bottom wall along the opening direction; and

[0006] A top pin piece comprising a supporting body and an inclined pin body, the supporting body is movably arranged in the receiving groove and simultaneously abuts against one side of the first protruding body and the second protruding body facing the bottom wall, the inclined pin body is arranged obliquely relative to the supporting body and connected with the supporting body, one end of the inclined pin body away from the supporting body is movably arranged in the lower die mechanism, and the inclined pin body is used for cooperating with the upper die mechanism and the lower die mechanism to form a forming cavity for injection molding the product when the mold is closed, and is used for retreating from the product under the driving of the seat body when the mold is opened.

[0007] The first protruding body and the second protruding body are arranged on the first groove wall and the second groove wall respectively, the support body is abutted to one side of the first protruding body and the second protruding body towards the bottom wall, so that the ejector pin seat and the ejector pin are stably connected in sliding mode, the ejector pin mechanism occupies a small size space in the horizontal direction, the reasonable layout of the mold is facilitated, the layout difficulty of the mold is reduced, and the stability of mold opening is improved.

[0008] In some embodiments, the ejector pin seat is provided with a plurality of the receiving grooves, the plurality of the receiving grooves are arranged at intervals along the first direction, the number of the first protruding body, the second protruding body and the ejector pin is a plurality, and the first protruding body, the second protruding body and the ejector pin are arranged one by one corresponding to the plurality of the receiving grooves respectively.

[0009] In some embodiments, the support body is gap-fitted with the first groove wall, the second groove wall and the bottom wall respectively.

[0010] In some embodiments, the inclined pin body comprises:

[0011] The inclined pin portion is arranged obliquely relative to the support body and connected with the support body;

[0012] The forming portion is arranged at one end of the inclined pin portion away from the support body, and is used for cooperating with the upper die mechanism and the lower die mechanism to form the forming cavity.

[0013] In some embodiments, the connection between the first protruding body and the first groove wall, the connection between the second protruding body and the second groove wall, and the connection between the first groove wall, the second groove wall and the bottom wall are all arc structures.

[0014] In some embodiments, the length of the first protruding body and the second protruding body in the first direction is equal.

[0015] In some embodiments, the length of the receiving groove in a second direction perpendicular to the first direction is greater than the length of the support body in the second direction.

[0016] In some embodiments, the ejector pin mechanism further comprises:

[0017] The guide member is arranged on the lower die mechanism and sleeved on the ejector pin seat, and is used for guiding the movement of the ejector pin seat in the mold opening direction.

[0018] Embodiments of the present application provide a forming mold, comprising:

[0019] The upper die mechanism;

[0020] a lower mold mechanism adapted to the upper mold mechanism;

[0021] The ejector pin mechanism described above, the ejector pin seat and the ejector pin of the ejector pin mechanism are both movably arranged in the lower mold mechanism, and the ejector pin cooperates with the upper mold mechanism and the lower mold mechanism to form a molding cavity for injection molding a product with an undercut structure.

[0022] In the molding mold described above, by arranging the first protruding body and the second protruding body on the first groove wall and the second groove wall respectively, the support body can abut against one side of the first protruding body and the second protruding body facing the bottom wall, so that the ejector pin seat and the ejector pin are stably connected in sliding mode, avoiding the ejector pin mechanism occupying too large a size space in the horizontal direction, which is conducive to the rational layout of the mold, reduces the difficulty of mold layout, and at the same time, when the ejector pin seat drives the ejector pin to move, the support body is subjected to a force applied by one side of the first protruding body and the second protruding body facing the bottom wall, so that the ejector pin is subjected to a uniform force, preventing the ejector pin from being stuck during the process of opening the mold and ejecting the product, and improving the opening stability.

[0023] In some embodiments, the number of the ejector pin mechanisms is multiple, and multiple ejector pin mechanisms are arranged at intervals in the lower mold mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A schematic diagram of the three-dimensional structure of the molding mold provided by the embodiments of the present application is shown.

[0025] Figure 2 A schematic diagram of the three-dimensional structure of the ejector pin seat and the ejector pin of the molding mold shown. Figure 1 A schematic diagram of the three-dimensional structure of the ejector pin seat and the ejector pin shown.

[0026] Figure 3 A schematic diagram of the structure of the ejector pin seat and the ejector pin shown. Figure 2 A schematic diagram of the structure of the ejector pin seat and the ejector pin shown.

[0027] Figure 4 A schematic diagram of the three-dimensional structure of the ejector pin seat shown. Figure 2 A schematic diagram of the three-dimensional structure of the ejector pin seat shown.

[0028] Main element symbol explanation: ejector pin mechanism 100, molding mold 200, upper mold mechanism 201, lower mold mechanism 202, ejector pin seat 10, seat body 11, receiving groove 111, first groove wall 1111, bottom wall 1112, second groove wall 1113, first protruding body 12, arc-shaped structure 121, second protruding body 13, ejector pin 20, support body 21, inclined pin body 22, inclined pin portion 221, molding portion 222, guide member 30. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below with reference to the drawings, in which the same or similar components have the same or similar designations and functions throughout the several figures which are not intended to limit the scope of the present application. The embodiments described below are examples only, and are not intended to limit the scope of the present application.

[0030] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the purpose of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the term "connection" should be broadly understood, for example, it can be a fixed connection, or a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection or can communicate with each other, it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned term in the present application can be understood according to the specific circumstances.

[0032] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0033] Referring to Figure 1 The present application provides a molding die 200, which comprises an upper die mechanism 201, a lower die mechanism 202 and a ejector pin mechanism 100. The lower die mechanism 202 is arranged opposite to the upper die mechanism 201 and is matched and opened and closed, the ejector pin mechanism 100 is movably arranged in the lower die mechanism 202, and the ejector pin mechanism 100 cooperates with the upper die mechanism 201 and the lower die mechanism 202 to form a molding cavity of a product (not shown in the figure) with a reverse locking structure.

[0034] Referring to Figure 2, the ejector pin mechanism 100 comprises an ejector pin seat 10, a seat body 11, a first protruding body 12 and a second protruding body 13, the seat body 11 is provided with a receiving groove 111, the receiving groove 111 comprises a first groove wall 1111, a bottom wall 1112 and a second groove wall 1113 connected in sequence, the first groove wall 1111 and the second groove wall 1113 are oppositely arranged along a first direction perpendicular to the mold opening direction, the first protruding body 12 is arranged on the first groove wall 1111, and the second protruding body 13 is arranged on the second groove wall 1113 and located between the first protruding body 12 and the bottom wall 1112 along the mold opening direction. The ejector pin piece 20 comprises a supporting body 21 and an inclined pin body 22, the supporting body 21 is movably arranged in the receiving groove 111 and simultaneously abuts against one side of the first protruding body 12 and the second protruding body 13 facing the bottom wall 1112, the inclined pin body 22 is arranged obliquely relative to the supporting body 21 and connected with the supporting body 21, one end of the inclined pin body 22 away from the supporting body 21 is movably arranged in the lower mold mechanism 202, and the inclined pin body 22 is used for cooperating with the upper mold mechanism 201 and the lower mold mechanism 202 to form a molding cavity of an injection molding product when the mold is closed, and is also used for retreating from the product under the driving of the seat body 11 when the mold is opened.

[0035] In the ejector pin mechanism 100 and the molding mold 200, by arranging the first protruding body 12 and the second protruding body 13 on the first groove wall 1111 and the second groove wall 1113 respectively, the supporting body 21 can abut against one side of the first protruding body 12 and the second protruding body 13 facing the bottom wall 1112, so that the ejector pin seat 10 and the ejector pin piece 20 are stably and slidably connected, the horizontal size of the ejector pin mechanism 100 is avoided from being too large, the mold layout is facilitated, the mold layout difficulty is reduced, and when the seat body 11 drives the movement of the ejector pin piece 20, the force is applied to the supporting body 21 through one side of the first protruding body 12 and the second protruding body 13 facing the bottom wall 1112, so that the force acting on the ejector pin piece 20 is uniform, the ejector pin piece 20 is prevented from being stuck during the process of opening the mold and ejecting the product, and the mold opening stability is improved.

[0036] Please refer to Figure 2 and Figure 3 In some embodiments, the ejector pin seat 10 is provided with a plurality of receiving grooves 111, the plurality of receiving grooves 111 are arranged at intervals along the first direction, the number of the first protruding bodies 12, the second protruding bodies 13 and the ejector pin pieces 20 is plural, and they are arranged one by one corresponding to the plurality of receiving grooves 111 respectively.

[0037] It can be understood that the first direction mentioned above refers to the direction of one receiving groove 111 in the ejector pin seat 10 pointing to another receiving groove 111.

[0038] Since the size of the ejector pin mechanism 100 is simple and the space occupied is small, by arranging the plurality of first protruding bodies 12, the plurality of second protruding bodies 13 and the plurality of ejector pin pieces 20 to share the ejector pin seat 10, the ejector pin mechanism 100 and the molding mold 200 are reasonably arranged, and the structure of the molding mold 200 is simplified.

[0039] Please refer to Figure 1 In some embodiments, the number of ejector pin mechanisms 100 is multiple, and the multiple ejector pin mechanisms 100 are arranged at intervals in the lower die mechanism 202 and cooperated with the upper die mechanism 201 and the lower die mechanism 202 to form a molding cavity. It can be understood that the above-mentioned multiple refers to two, three, four, five, etc.

[0040] In this way, the molding die 200 utilizes the simple size and small space occupation characteristics of the ejector pin mechanism 100, so that the multiple ejector pin mechanisms 100 can be reasonably arranged in the molding die 200, preventing the multiple ejector pin mechanisms 100 from being stuck with each other when the mold is opened.

[0041] It should be noted that the molding cavity formed by the molding die 200 with one ejector pin mechanism 100 is different from the molding cavity formed by the molding die 200 with multiple ejector pin mechanisms 100, and the products formed by the two are also different.

[0042] Please refer to Figure 2 In some embodiments, the support body 21 is gap-fitted with the first groove wall 1111, the second groove wall 1113, and the bottom wall 1112, respectively.

[0043] In this way, the support body 21 has a large enough movement gap with the first groove wall 1111, the second groove wall 1113, and the bottom wall 1112, avoiding the friction between the support body 21 and the first groove wall 1111, the second groove wall 1113, and the bottom wall 1112 when the support body 21 slides in the accommodation groove 111, so that the stress distribution of the support body 21 is not uniform and the support body 21 is stuck when the mold is opened, thereby ensuring the stable sliding of the support body 21 in the accommodation groove 111.

[0044] It should be noted that the support body 21 only contacts the side of the first protruding body 12 and the second protruding body 13 facing the bottom wall 1112, and other parts of the support body 21 have a certain distance from the accommodation groove 111.

[0045] Please continue to refer to Figure 2 In some embodiments, the inclined pin body 22 includes an inclined pin portion 221 and a molding portion 222. The inclined pin portion 221 is arranged obliquely relative to the support body 21 and connected with the support body 21, and the molding portion 222 is arranged at one end of the inclined pin portion 221 away from the support body 21, for cooperating with the upper die mechanism 201 and the lower die mechanism 202 to form a molding cavity.

[0046] In this way, by arranging the molding portion 222 at one end of the obliquely arranged inclined pin portion 221 away from the support body 21, the inclined pin body 22 can be reasonably arranged, so as to ensure that the molding portion 222 stably cooperates with the upper die mechanism 201 and the lower die mechanism 202 to form a molding cavity when the mold is closed.

[0047] Please refer toFigure 4 In some embodiments, the connection between the first protrusion 12 and the first groove wall 1111, the connection between the second protrusion 13 and the second groove wall 1113, and the connection between the first groove wall 1111 and the second groove wall 1113 and the bottom wall 1112 are all arc-shaped structures 121.

[0048] In this way, the arc-shaped structures 121 avoid the support body 21 from interfering with the seat body 11 when the support body 21 slides in the receiving groove 111.

[0049] Please refer to Figure 2 In some embodiments, the lengths of the first protrusion 12 and the second protrusion 13 in the first direction are equal, so that the seat body 11 applies the same force to the two parts of the ejector pin 20 through the first protrusion 12 and the second protrusion 13 with equal lengths, thereby making the force on the ejector pin 20 uniform and balanced, which is conducive to preventing the ejector pin 20 from being stuck during the process of ejecting the product.

[0050] In some embodiments, the inclined pin body 22 is clearance-fitted with the side of the seat body 11 facing the upper die mechanism 201, so that a clearance gap is formed between the inclined pin body 22 and the seat body 11, which is conducive to the stable movement of the inclined pin body 22 driven by the support body 21.

[0051] In some embodiments, the length of the receiving groove 111 in the second direction perpendicular to the first direction is greater than the length of the support body 21 in the second direction, which ensures that the receiving groove 111 provides a large enough length dimension for the support body 21, and is conducive to the stable sliding of the support body 21 during the mold opening process.

[0052] It can be understood that the above-mentioned second direction refers to the extension direction of the first protrusion 12.

[0053] Please refer to Figure 1 In some embodiments, the ejector pin mechanism 100 further comprises a guide 30, which is arranged on the lower die mechanism 202 and is sleeved on the ejector pin seat 10, and the guide 30 is used to guide the movement of the ejector pin seat 10 in the mold opening direction.

[0054] In this way, by arranging the above-mentioned guide 30, the guide 30 can guide the movement direction of the ejector pin seat 10, so that the ejector pin seat 10 moves stably in the mold opening direction under the guidance of the guide 30, thereby ensuring that the ejector pin 20 stably retreats from the product.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. A pin ejector mechanism applied to a molding die for injection molding a product having an undercut structure, the molding die comprising an upper die mechanism and a lower die mechanism which are adapted to be opened and closed, characterized in that, The ejector pin mechanism comprises: an ejector pin seat comprising a seat body, a first protruding body and a second protruding body, the seat body is provided with a receiving groove, the receiving groove comprises a first groove wall, a bottom wall and a second groove wall connected in sequence, the first groove wall and the second groove wall are oppositely arranged along a first direction perpendicular to the mold opening direction, the first protruding body is arranged on the first groove wall, the second protruding body is arranged on the second groove wall and located between the first protruding body and the bottom wall along the mold opening direction; and an ejector pin member comprising a support body and an inclined pin body, the support body is movably arranged in the receiving groove and simultaneously abuts against one side of the first protruding body and the second protruding body towards the bottom wall, the inclined pin body is arranged obliquely relative to the support body and connected with the support body, one end of the inclined pin body away from the support body is movably arranged in the lower mold mechanism, the inclined pin body is used for cooperating with the upper mold mechanism and the lower mold mechanism to form a molding cavity for injection molding the product when the mold is closed, and is also used for retreating from the product under the driving of the seat body when the mold is opened.

2. The pin lifter mechanism of claim 1 wherein, The ejector pin seat is provided with a plurality of receiving grooves, the plurality of receiving grooves are arranged at intervals along the first direction, the number of the first protruding body, the second protruding body and the ejector pin member are all plural, and they are respectively arranged one by one corresponding to the plurality of receiving grooves.

3. The pin lifter mechanism of claim 1 wherein, The support body is gap-fitted with the first groove wall, the second groove wall and the bottom wall respectively.

4. The pin lifter mechanism of claim 1 wherein, The inclined pin body comprises: an inclined pin part arranged obliquely relative to the support body and connected with the support body; a molding part arranged at one end of the inclined pin part away from the support body and used for cooperating with the upper mold mechanism and the lower mold mechanism to form the molding cavity.

5. The pin lifter mechanism of claim 1 wherein, The connection between the first protruding body and the first groove wall, the connection between the second protruding body and the second groove wall, and the connection between the first groove wall, the second groove wall and the bottom wall are all arc structures.

6. The pin lifter mechanism of claim 1 wherein, The lengths of the first protruding body and the second protruding body in the first direction are equal.

7. The pin lifter mechanism of claim 1 wherein, The length of the receiving groove in a second direction perpendicular to the first direction is greater than the length of the support body in the second direction.

8. The pin lifter mechanism of claim 1 wherein, The ejector pin mechanism further comprises: a guide member arranged in the lower mold mechanism and sleeved on the ejector pin seat, the guide member is used for guiding the movement of the ejector pin seat along the mold opening direction.

9. A forming die characterized by, comprises: an upper mold mechanism; a lower mold mechanism adapted to the upper mold mechanism; The ejector pin mechanism of any one of claims 1-8, the ejector pin seat and the ejector pin member of the ejector pin mechanism are movably arranged in the lower mold mechanism, the ejector pin member cooperates with the upper mold mechanism and the lower mold mechanism to form a molding cavity for injection molding a product with a reverse buckle structure.

10. The forming mold of claim 9, wherein, The number of the ejector pin mechanism is plural, and the plurality of ejector pin mechanisms are arranged at intervals in the lower mold mechanism.

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