Insert positioning mechanism and injection mold

Abstract

The utility model belongs to the technical field of molds, and discloses an insert positioning mechanism and an injection mold. The insert positioning mechanism comprises a first positioning piece and a second positioning piece, the first positioning piece is embedded in the female die, and a part of the first positioning piece extends into the cavity and can be matched with the insert plug-in in the die assembly direction of the die; and the second positioning piece penetrates through the male mold in a sliding manner, slides in the mold closing direction of the mold, partially extends into the cavity, and has a first working state in which the second positioning piece abuts against the insert and a second working state in which a gap is reserved between the second positioning piece and the insert. According to the insert positioning mechanism, the insert is preliminarily positioned through the first positioning piece, the second positioning piece is further connected with the insert in an abutting mode, accurate limiting of the insert is achieved, the insert is not prone to abnormal movement, and the yield of products is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field especially relates to a kind of insert positioning mechanism and injection mould. BACKGROUND

[0002] Insert refers to embedding in product in the plastic forming process, forming the part of inseparable coupling. Insert can be metal or other material, usually implanted in plastic product when mould injection, combined with plastic product. The main role of insert is to increase the function or decorative effect of plastic product, while improving the mechanical strength and wear resistance of plastic parts.

[0003] The present injection molding product has a connecting barrel on the product, one end of the connecting barrel has a plugging part to block the end of the connecting barrel, the other end of the connecting barrel is open, and an insert is arranged inside the connecting barrel to connect other components through the insert. During injection molding, it is not convenient to accurately position the insert, and the insert is prone to move during mold closing and injection molding, causing the plugging part to be too thin or broken, which greatly affects the quality of the product. UTILITY MODEL CONTENT

[0004] The utility model aims to provide an insert positioning mechanism and injection mold to accurately position the position of the insert during injection molding, prevent the insert from moving during injection molding, and improve the yield of the product.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The insert positioning mechanism is used to position the insert inside the mold, the mold includes a male mold and a female mold, the male mold and the female mold can be closed to form a cavity for injection molding, the female mold is provided with an injection port communicating with the cavity, and the insert positioning mechanism includes:

[0007] The first positioning member is embedded in the interior of the female mold, part of the first positioning member extends into the interior of the cavity, and the part can cooperate with the insert plug along the closing direction of the mold; and

[0008] The second positioning member is slidably arranged through the male mold, the second positioning member slides along the closing direction of the mold, part of the second positioning member extends into the interior of the cavity, the second positioning member has a first working state of abutting against the insert and a second working state of leaving a gap between the insert, and the second positioning member can be switched from the first working state to the second working state under the pushing of the injection fluid.

[0009] As a preferred, the first positioning member is in a columnar shape, the insert is in an annular shape, and the insert is nested on the first positioning member.

[0010] Preferably, the end of the first positioning member is provided with an insert post, the diameter of the insert post is smaller than that of the first positioning member, and the insert sleeve is sleeved on the insert post and abuts against the end of the first positioning member.

[0011] Preferably, the insert post, the first positioning member and the insert are coaxially arranged.

[0012] Preferably, the second positioning member is in the shape of a column, and the diameter of the second positioning member is greater than or equal to the outer diameter of the insert.

[0013] Preferably, the insert positioning mechanism further comprises:

[0014] a positioning seat, which is arranged on the side of the male mold away from the female mold and is spaced apart from the male mold; and

[0015] an elastic member, which is arranged between the positioning seat and the second positioning member, and the pressure of the injection fluid acting on the second positioning member can overcome the elastic force of the elastic member.

[0016] Preferably, a positioning groove is formed in the positioning seat, and the elastic member is located in the positioning groove.

[0017] Preferably, a limiting groove is formed in the second positioning member at a position corresponding to the positioning groove, and the elastic member partially extends out of the positioning groove and abuts against the side wall of the limiting groove.

[0018] Preferably, a limiting plate is arranged on the side of the positioning seat close to the second positioning member, a through hole is formed in the limiting plate for the second positioning member to pass through, a sliding groove is formed in the end of the through hole close to the positioning seat, so that a stepped surface is formed at the connection between the through hole and the sliding groove.

[0019] A limiting head is arranged at the end of the second positioning member close to the positioning seat, the limiting head is located in the sliding groove, and the limiting head abuts against the stepped surface when the second positioning member is in the first working state.

[0020] An injection mold, which comprises a mold body and an insert positioning mechanism.

[0021] The injection mold has the following beneficial effects:

[0022] The embedded part positioning mechanism of the utility model, through the first positioning piece in the mold closing direction cooperation with the embedded part insert, thereby to the embedded part preliminary positioning, make embedded part not easy along perpendicular to the mold closing direction direction movement, further through the second positioning piece abuts embedded part, before the injection fluid promotes the second positioning piece to the embedded part in the mold closing direction direction limit, thereby realize embedded part accurate limit, make embedded part not easy to appear abnormal movement;

[0023] When injection molding, injection fluid flows from the injection port on the female mold to the inside of the cavity, and flows towards the male mold. The injection fluid flowing to the second positioning piece promotes the second positioning piece to move, so that the time when the second positioning piece starts to move can be accurately controlled. That is, when the injection fluid promotes the second positioning piece, the injection fluid has already flowed to the position farthest from the injection port. At this time, the injection fluid has filled the entire cavity, and the embedded part has no abnormal movement space, thereby greatly improving the yield of the product. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is the product of the utility model;

[0025] Figure 2 is the front view of the injection mold of the utility model;

[0026] Figure 3 is Figure 2 the sectional view along A-A direction.

[0027] In the drawings:

[0028] 100, product; 101, connecting barrel; 102, plugging part; 200, nut ring; 1, first positioning piece; 11, insert column; 2, second positioning piece; 21, limiting groove; 22, limiting head; 3, positioning seat; 31, positioning groove; 32, limiting plate; 321, sliding groove; 322, step surface; 4, elastic piece; 5, mold body; 51, movable mold; 52, fixed mold; 53, forming cavity. DETAILED DESCRIPTION

[0029] The utility model will be further described in detail below in combination with the drawings and examples. It can be understood that the specific examples described here are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all structures.

[0030] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element's interaction relationship.For the ordinary skill in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0031] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional features between them.Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the horizontal height of the first feature is higher than the second feature.The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the horizontal height of the first feature is less than the second feature.

[0032] In the description of the embodiment, the terms "on", "under", "right", etc. Orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model.In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0033] The following refers to Figures 1 to 3 The insert positioning mechanism and injection mold provided by the utility model are described.

[0034] Referring to Figure 1 At present, there is an injection product 100, which has a plurality of circular connecting barrels 101, and four are taken as an example in the embodiment, one end of the connecting barrel 101 is integrally formed with a plugging part 102 to plug the end of the connecting barrel 101, and the other end of the connecting barrel 101 is open. The inside of each connecting barrel 101 is provided with an insert, which is a nut ring 200 coaxially arranged with the connecting barrel 101, so as to be screwed with other parts through the nut ring 200. At present, the nut ring 200 is prone to move during the injection process, resulting in that the thickness of the plugging part 102 is too thin or is broken.

[0035] In order to accurately position the insert, the utility model provides an insert positioning mechanism and injection mold. Referring to Figure 2 And Figure 3The injection mold comprises a mold body 5 and an insert positioning mechanism, the mold body 5 comprises a movable mold 51 and a fixed mold 52, the movable mold 51 and the fixed mold 52 can be closed to form a molding cavity 53 for injection molding, the molding cavity 53 is shaped to match the product 100, and the fixed mold 52 is provided with an injection port which communicates with the molding cavity 53. It should be noted that the movable mold 51 and the fixed mold 52 in the embodiment are distributed along the vertical direction, and the movable mold 51 is located above the fixed mold 52. The following description is based on the above orientation.

[0036] It should be noted that in other embodiments, the movable mold 51 and the fixed mold 52 can also be distributed along the horizontal direction or the inclined direction, and the specific orientation is not limited.

[0037] The insert positioning mechanism is arranged on the mold body 5, and the insert positioning mechanism is intended to accurately position the insert inside the molding cavity 53 to prevent the insert from moving during injection molding and affecting the quality of the product 100. The specific structure of the insert positioning mechanism will be described below.

[0038] The insert positioning mechanism comprises a first positioning member 1 and a second positioning member 2, the first positioning member 1 is embedded in the inside of the fixed mold 52, and the first positioning member 1 is provided with one for each position of the nut ring 200, part of the first positioning member 1 extends to the inside of the molding cavity 53, and this part can cooperate with the insert plug along the closing direction of the mold. The second positioning member 2 is slidably arranged through the movable mold 51, and the second positioning member 2 is provided with one for each position of the nut ring 200, the second positioning member 2 slides along the closing direction of the mold, part of the second positioning member 2 extends to the inside of the molding cavity 53, the second positioning member 2 has a first working state of abutting against the nut ring 200 and a second working state of leaving a gap between the nut ring 200, and the second positioning member 2 can be switched from the first working state to the second working state under the push of the injection fluid.

[0039] Specifically, the first positioning member 1 in the embodiment is in the form of a column, and the first positioning member 1 is vertically arranged, and the nut ring 200 is coaxially arranged outside the first positioning member 1. Thus, the first positioning member 1 radially positions the nut ring 200, so that the nut ring 200 is not easy to move along its radial direction, i.e. perpendicular to the closing direction of the injection mold.

[0040] As a preferred embodiment, the top end of the first positioning member 1 is connected with a plug column 11, the diameter of the plug column 11 is smaller than that of the first positioning member 1, the length of the plug column 11 is consistent with that of the nut ring 200, the nut ring 200 is arranged on the plug column 11, the bottom end of the nut ring 200 abuts against the end of the first positioning member 1, and the top end of the nut ring 200 is flush with the top end of the first positioning member 1.

[0041] Since the diameter of the plug-in column 11 is smaller than the first positioning member 1, a step is formed at the top end of the first positioning member 1, thereby axially limiting the nut ring 200, making the nut ring 200 not easy to move downward, and further improving the limiting effect on the nut ring 200. At the same time, it is also not easy to make the nut ring 200 contact the inner wall of the forming cavity 53, thereby protecting the inner wall of the forming cavity 53 to a certain extent.

[0042] Optionally, in other embodiments, if the insert is in other forms, the plug-in column 11 at the top end of the first positioning member 1 is also cancelled, and a positioning hole is opened according to the shape of the insert, so that the insert is inserted into the positioning hole, thereby realizing the plug-in positioning of the first positioning member 1 and the insert.

[0043] Specifically, the second positioning member 2 in the embodiment is in a cylindrical shape, and the second positioning member 2 is coaxially arranged with the nut ring 200. The insert positioning mechanism further comprises a positioning seat 3 and an elastic member 4. The positioning seat 3 is located above the movable die 51 and is spaced apart from the movable die 51. The elastic member 4 is located between the second positioning member 2 and the positioning seat 3, and the elastic force of the elastic member 4 is smaller than the pressure of the injection fluid.

[0044] Based on the above, the second positioning member 2 is elastically applied by the elastic member 4, so that the second positioning member 2 abuts against the top of the nut ring 200, that is, the second positioning member 2 is in a first working state, thereby making the nut ring 200 not easy to move upward, so as to further limit the nut ring 200. Since the second positioning member 2 abuts against the top end of the nut ring 200 by the elastic force of the elastic member 4, that is, the second positioning member 2 is located at the top of the forming cavity 53, when the injection fluid enters the forming cavity 53 from the lower part, it will flow upward. The injection fluid needs to fill the entire forming cavity 53 before it can overcome the elastic force of the elastic member 4 to push the second positioning member 2 to move upward, thereby accurately controlling the time when the second positioning member 2 starts to move.

[0045] Since the injection fluid has filled the outer periphery of the nut ring 200 before the second positioning member 2 moves upward, when the second positioning member 2 moves upward, the high-pressure injection fluid will quickly enter between the second positioning member 2 and the nut ring 200 to fill the gap between the second positioning member 2 and the nut ring 200, that is, the second positioning member 2 is in a second working state (refer to the state in Figure 3 During this process, the high-pressure injection fluid will also extrude the nut ring 200 downward, finally preventing the nut ring 200 from moving upward in advance, and also ensuring the thickness of the plugging part 102, which helps to improve the quality of the injection product 100.

[0046] Further preferably, the diameter of the second positioning member 2 is greater than or equal to the outer diameter of the nut ring 200, so that the contact area between the nut ring 200 and the second positioning member 2 is maximized, and the nut ring 200 can be stressed more evenly. In other embodiments, the second positioning member 2 can also be a quadrangular prism, a hexagonal prism, etc.

[0047] As an optimization, the positioning seat 3 in the embodiment is provided in a plate shape and is perpendicular to the axial direction of the second positioning member 2. In other embodiments, the positioning seat 3 can also be provided in the form of a frame.

[0048] In addition, in order to prevent excessive extrusion of the nut ring 200, a limiting plate 32 is connected to the side of the positioning seat 3 close to the second positioning member 2, the limiting plate 32 is provided with a through hole for the second positioning member 2 to pass through, and a sliding groove 321 is provided at the end of the through hole close to the positioning seat 3, that is, the top end of the through hole is provided with the sliding groove 321, the sliding groove 321 is an annular groove, and the connection between the through hole and the sliding groove 321 forms a stepped surface 322. The end of the second positioning member 2 close to the positioning seat 3 is connected with a limiting head 22, that is, the top end of the second positioning member 2 is coaxially connected with the limiting head 22, and the diameter of the limiting head 22 is greater than that of the second positioning member 2, and the limiting head 22 is located inside the sliding groove 321.

[0049] When the second positioning member 2 is in the first working state, the limiting head 22 abuts against the stepped surface 322, thereby limiting the second positioning member 2 through the stepped surface 322 to prevent the second positioning member 2 from excessively extruding the nut ring 200.

[0050] Exemplarily, the elastic member 4 in the embodiment is a spring, and is further preferably a coil spring. In order to limit the coil spring, a positioning groove 31 is provided on the positioning seat 3, and a limiting groove 21 is provided on the second positioning member 2 at a position corresponding to the positioning groove 31, and the two ends of the coil spring abut against the opposite side walls of the positioning groove 31 and the limiting groove 21, respectively. The two ends of the coil spring are limited by the positioning groove 31 and the limiting groove 21, so as to prevent displacement of the two ends of the coil spring, thereby ensuring the working stability of the coil spring.

[0051] Optionally, in other embodiments, the second positioning member 2 can also be driven to move downward by a gas cylinder, an oil cylinder or other driving members, so as to be in the first working state, and the force is unloaded before the second positioning member 2 needs to move upward, so that the second positioning member 2 can slide upward under the pushing of the injection fluid and switch to the second working state.

[0052] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the utility model. Here, it is not necessary and impossible to exhaust all the embodiments. Any modification, equivalent replacement and improvement made within the spirit and principle of the utility model shall be included in the protection scope of the utility model claim.

Claims

1. An insert positioning mechanism for positioning an insert inside a mold, the mold comprising a male mold and a female mold, the male mold and the female mold being capable of being closed to form a cavity for injection molding, the female mold being provided with an injection port communicating with the cavity, characterized in that, The insert positioning mechanism comprises: a first positioning member (1) embedded in the inner part of the female mold, part of the first positioning member (1) extending into the cavity, and the part being capable of cooperating with the insert plug along the closing direction of the mold; a second positioning member (2) sliding through the male mold, the second positioning member (2) sliding along the closing direction of the mold, part of the second positioning member (2) extending into the cavity, the second positioning member (2) having a first working state of abutting against the insert and a second working state of leaving a gap with the insert, and the second positioning member (2) being capable of switching from the first working state to the second working state under the pushing of the injection fluid.

2. The insert positioning mechanism of claim 1, wherein The first positioning member (1) is in a columnar shape, and the insert is in an annular shape and is nested on the first positioning member (1).

3. The insert positioning mechanism of claim 2, wherein, An insert column (11) is arranged at the end of the first positioning member (1), the diameter of the insert column (11) is smaller than that of the first positioning member (1), the insert is nested on the insert column (11) and abuts against the end of the first positioning member (1).

4. The insert positioning mechanism of claim 3, wherein, The insert column (11), the first positioning member (1) and the insert are coaxially arranged.

5. The insert positioning mechanism of claim 2, wherein The second positioning member (2) is in a columnar shape, and the diameter of the second positioning member (2) is greater than or equal to the outer diameter of the insert.

6. The insert positioning mechanism of any of claims 1-5, wherein, The insert positioning mechanism further comprises: a positioning seat (3) arranged on the side of the male mold away from the female mold and spaced apart from the male mold; and a resilient member (4) arranged between the positioning seat (3) and the second positioning member (2), the pressure of the injection fluid acting on the second positioning member (2) being capable of overcoming the elastic force of the resilient member (4).

7. The insert positioning mechanism of claim 6, wherein, A positioning groove (31) is arranged on the positioning seat (3), and the resilient member (4) is located in the positioning groove (31).

8. The insert positioning mechanism of claim 7, wherein, A limiting groove (21) corresponding to the position of the positioning groove (31) is arranged on the second positioning member (2), and the resilient member (4) partially extends out of the positioning groove (31) and abuts against the side wall of the limiting groove (21).

9. The insert positioning mechanism of claim 6, wherein, A limiting plate (32) is arranged on the side of the positioning seat (3) close to the second positioning member (2), a through hole is arranged on the limiting plate (32) for the second positioning member (2) to pass through, a sliding groove (321) is arranged at one end of the through hole close to the positioning seat (3), so that a stepped surface (322) is formed at the connection between the through hole and the sliding groove (321); A limiting head (22) is arranged at one end of the second positioning member (2) close to the positioning seat (3), and the limiting head (22) is located in the sliding groove (321), when the second positioning member (2) is in the first working state, the limiting head (22) abuts against the stepped surface (322).

10. Injection mold, comprising a mold body (5), characterized in that The injection mold further comprises the insert positioning mechanism according to any one of claims 1-9.

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