Positioning structure of hardware tombstone

Abstract

The positioning structure comprises a rear mold, a mold cavity and hardware placed in the mold cavity are arranged in the rear mold, and the hardware comprises a connecting part and fixing parts arranged at the two ends of the connecting part; positioning inserts corresponding to the fixing parts are arranged in the rear mold and located at the two ends of the hardware, positioning grooves and first openings communicated with the positioning grooves are formed in the positioning inserts, and the fixing parts penetrate through the first openings to be inserted and fixed into the positioning grooves, so that the hardware cannot rebound upwards to deform; a positioning insert pin is further arranged in the rear mold, a positioning hole is formed in the hardware, and the positioning insert pin penetrates through the rear mold and extends into the mold cavity, so that at least part of the positioning insert pin is arranged in the positioning hole in a penetrating mode, the hardware is fixed in all directions, the fixing effect is better, the mold closing accuracy is further ensured, and the hardware is prevented from being damaged. And the injection molding quality and efficiency are higher.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to a positioning structure of a hardware set. Background Art

[0002] In injection molding, the beer mold is also called the secondary injection molding mold or the overmolding mold. It is a process in which the sheet is molded in the primary plastic mold, and then the molded parts (such as hardware and plastic parts) are taken out and placed in the secondary molding mold to be injected with the same or another sheet again. After the hardware is placed in the mold, it will deform to varying degrees due to its own properties, resulting in misalignment or offset, so that the die and the hardware are misaligned when the mold is closed, which affects the product quality and mold life, and makes the mold unstable and unproductive. Although it is fixed by positioning pins in the prior art, the fixing direction is limited, and it is impossible to limit the upward deformation of the hardware, so that a good fixing effect cannot be achieved, resulting in low product precision and low injection molding production efficiency. Summary of the invention

[0003] (1) Technical issues to be solved

[0004] The invention discloses a positioning structure of a hardware set monument, aiming to solve the problem of poor fixing effect of hardware in the prior art resulting in deformation and dislocation.

[0005] (2) Technical solution

[0006] The present invention discloses a positioning structure of a hardware fitting, comprising a rear mold, a mold cavity being provided in the rear mold and hardware placed in the mold cavity, the hardware comprising a connecting portion and a fixing portion arranged at both ends of the connecting portion, positioning inserts corresponding to the fixing portion being provided in the rear mold and at both ends of the hardware, the positioning inserts being provided with a positioning groove and a first opening communicating with the positioning groove, the fixing portion being inserted and fixed in the positioning groove through the first opening; a positioning pin being further provided in the rear mold, a positioning hole being provided on the hardware, the positioning pin passing through the rear mold and extending into the mold cavity, so that at least a portion of the positioning pin is inserted into the positioning hole.

[0007] Furthermore, a side wall of the positioning insert is provided with a second opening adjacent to the first opening, and the second opening is communicated with the positioning groove.

[0008] Furthermore, the first opening and the second opening are both provided with chamfers that have a guiding effect on the installation of the hardware.

[0009] Furthermore, the height inside the positioning groove is H1, the height of the first opening is H2, and H1<H2.

[0010] Furthermore, two hardware pieces are provided in the mold cavity, and the two hardware pieces are symmetrically arranged along the central axis L1, and a connecting insert is connected between the two positioning inserts corresponding to the positions of the two hardware pieces.

[0011] Furthermore, the connecting insert closes the second openings on the two positioning inserts that are opposite to each other, so that the other second opening on the two positioning inserts is arranged in a direction away from the connecting insert.

[0012] Furthermore, the positioning hole is arranged on the connecting portion of the hardware.

[0013] Furthermore, the portion of the positioning pin extending outward after passing through the positioning hole is an extension portion, and a height H3 of the extension portion is 0.2 mm.

[0014] Furthermore, a plurality of ejector pins are disposed in the mold cavity, and the ejector pins are sequentially spaced and abutted against a side of the hardware away from the central axis L1 along the direction of the two ends of the hardware.

[0015] Furthermore, two mold cavities with the same structure are provided in the rear mold, and the two mold cavities are symmetrically arranged.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] Positioning inserts are provided in the rear mold respectively corresponding to the two ends of the hardware, and a positioning groove is provided in the positioning insert. Fixed parts that are clamped with the positioning groove are provided at both ends of the hardware. The clamping connection between the fixing part and the positioning groove prevents the hardware from rebounding upward and deforming. At the same time, a positioning pin is also provided in the rear mold, and a positioning hole is provided on the hardware. The positioning pin passes through the positioning hole and extends outside the positioning hole, which can limit the movement of the hardware forward, backward, left and right, thereby fixing the hardware in various directions, and the fixing effect is better, thereby ensuring the accuracy of the mold closing and making the injection molding quality and efficiency higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the front mold and rear mold combination of the present invention.

[0019] Figure 2 A cross-sectional view of the front mold and rear mold combination of the present invention Figure 1 .

[0020] Figure 3 It is a schematic diagram of the overall structure of the present invention.

[0021] Figure 4 It is a schematic structural diagram of the positioning pin and hardware of the present invention.

[0022] Figure 5It is a schematic diagram of the hardware structure of the present invention.

[0023] Figure 6 It is a partial stereoscopic view of the positioning insert of the present invention.

[0024] Figure 7 It is a partial side view of the positioning insert of the present invention.

[0025] Figure 8 It is a partial schematic diagram of the positioning insert and the connecting insert structure of the present invention.

[0026] Fig. 9 It is a partial cross-sectional view of the overall structure of the present invention.

[0027] Fig.10 It is a partial enlarged view of the overall structure of the present invention.

[0028] Fig.11 A cross-sectional view of the front mold and rear mold combination of the present invention Figure 2 .

[0029] Figure markings: 1-rear mold, 11-mold cavity, 12-through hole, 13-oblique ejector pin, 14-straight ejector pin, 2-hardware, 21-connecting part, 211-transverse section, 212-longitudinal section, 22-fixing part, 23-positioning hole, 3-positioning insert, 31-positioning groove, 32-first opening, 33-second opening, 34-chamfer, 4-positioning insert, 41-extension part, 5-connecting insert, 6-ejector pin, 7-front mold, 71-glue inlet, 72-insertion strip. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-11 .

[0032] like Figure 1-3As shown, the present invention discloses a positioning structure of a hardware set monument, including a front mold 7 and a rear mold 1, wherein the front mold 7 and the rear mold 1 are both provided with a mold cavity 11, and the glue inlet 71 is arranged on the front mold 7, wherein a hardware 2 is placed in the mold cavity 11 located in the rear mold 1, and in an embodiment of the present invention, the hardware 2 includes a connecting portion 21 and a fixing portion 22 arranged at both ends of the connecting portion 21, wherein the connecting portion 21 is an arc-shaped structure, and the two ends are formed by bending the fixing portions 22 at both ends downward with the points on the arc surface deviating from one end as vertices, and the fixing portions 22 at both ends are maintained on the same horizontal plane. Therefore, when no force is applied, the hardware 2 will deform due to its own elasticity and deviate from the original position. Therefore, positioning inserts 3 corresponding to the fixing portion 22 are provided in the rear mold 1 and at both ends of the hardware 2. The positioning inserts 3 are provided with a positioning groove 31 and a first opening 32 connected to the positioning groove 31. The fixing portion 22 passes through the first opening 32 and is inserted into the positioning groove 31, thereby achieving the effect of fixing the hardware 2 in the rear mold 1, so that it cannot rebound upward and deform after being placed, which is more conducive to improving the accuracy of mold closing and improving the yield rate of injection molded products.

[0033] Furthermore, if Figure 4 and Figure 5 As shown, a positioning pin 4 is further provided in the rear mold 1, a positioning hole 23 is provided on the hardware 2, and a through hole 12 corresponding to the positioning hole 23 is provided in the rear mold 1. When the fixing parts 22 at both ends of the hardware 2 are inserted and fixed in the positioning groove 31, the positioning pin 4 passes through the through hole 12 of the rear mold 1 and extends into the mold cavity 11 to be connected with the positioning hole 23, so that at least part of the positioning pin 4 is penetrated into the positioning hole 23, so as to fix the position of the hardware 2 to prevent it from moving forward and backward or left and right, and the fixing effect is better.

[0034] It should be noted that the middle part of the hardware 2 of the present invention does not need to be sealed after injection molding, such as the sleeve of the hardware iron net. Therefore, in order to meet the needs of different product shapes, a plurality of inlay strips 72 directly abutting against the hardware 2 are provided in the front mold 7, such as Figure 2 As shown, one end of the inlay strip 72 is clamped with the front mold 7 and moves with the movement of the front mold 7, and the other end is abutted against the hardware 2, and the abutting surface is adapted to the surface of the hardware 2, both of which are arc surfaces; when it is necessary to adjust the plastic sealing part, different effects can be achieved by replacing the inlay strip 72, reducing product processing and improving the flexibility of mold use.

[0035] Furthermore, if Figure 6 , Figure 7As shown, since the distance between the two ends of the hardware 2 after being fixed is adapted to the distance between the two positioning grooves 31, in order to avoid excessive elastic deformation of the hardware 2 when the fixing portion 22 is inserted into the positioning groove 31, a second opening 33 adjacent to the first opening 32 is provided on the side wall of the positioning insert 3, and the second opening 33 is connected to the positioning groove 31. Therefore, the user can insert the fixing portion 22 of the hardware 2 into the positioning groove 31 from the side of the rear mold 1 facing the direction of the second opening 33, which is convenient for installation and can further reduce damage to the hardware 2, thereby increasing the service life of the hardware 2.

[0036] Preferably, the first opening 32 and the second opening 33 are both provided with chamfers 34 that have a guiding effect on the installation of the hardware 2. The setting of the chamfers 34 can make the fixing portion 22 more accurately inserted into the positioning groove 31, enhance the guiding property, reduce the resistance during assembly, thereby improving the installation efficiency, and then improving the efficiency of injection molding, making the mold more mass-producible; at the same time, it can also reduce the friction between the hardware 2 and the groove wall, thereby reducing the risk of wear and damage.

[0037] Preferably, if Figure 7 As shown, the height of the positioning groove 31 is H1, the height of the first opening 32 is H2, and H1<H2, so that the positioning groove 31 is set in a trumpet-shaped opening. When the product is demoulded, the fixing portion 22 only needs to be slightly deformed to slide out of the positioning groove 31 along the direction of the first opening 32, thereby reducing the deformation of the fixing portion 22 and avoiding damage to the product.

[0038] Furthermore, if Figure 3 and Figure 8 As shown, two hardware parts 2 are provided in the mold cavity 11, and the two hardware parts 2 are symmetrically arranged along the central axis L1. A connecting insert 5 is connected between the two positioning inserts 3 corresponding to the positions of the two hardware parts 2, and the two sides of the connecting insert 5 are tightly connected to the two positioning inserts 3 at the same end, that is, the second opening 33 on the adjacent side of the positioning insert 3 and the connecting insert 5 is fitted with the outer wall of the connecting insert 5, thereby forming a structure in which the connecting insert 5 closes the second openings 33 opposite to each other on the two positioning inserts 3, so that the other second opening 33 on the two positioning inserts 3 is set in the direction away from the connecting insert 5.

[0039] By setting the connecting insert 5, the second openings 33 opposite to each other on the two positioning inserts 3 can be disconnected from each other, and the user does not need to worry about the hardware 2 slipping out of the second opening 33 on the other side of the positioning groove 31 during installation. When the hardware 2 abuts against the connecting insert 5, the hardware 2 can no longer move, which means that it is installed in place. Therefore, the setting of the connecting insert 5 can limit the hardware 2, thereby further improving the efficiency of installation.

[0040] Furthermore, if Fig. 9 As shown, the positioning hole 23 is arranged on the connecting portion 21 of the hardware 2. In the embodiment of the present invention, the connecting portion 21 includes a transverse section 211 and a longitudinal section 212. The transverse section 211 is longer than the longitudinal section 212. The positioning hole 23 is arranged on the transverse section 211, which is convenient for the setting and installation of the position of the positioning pin 4, so that the positioning pin 4 is consistent with the ejection direction of the ejection mechanism in the rear mold 1, making the structure layout in the mold more reasonable and simpler to understand. The ejection mechanism includes a plurality of inclined ejector pins 13 and straight ejector pins 14. The inclined ejector pins 13 are respectively arranged on the transverse section 211 and the longitudinal section 212. The inclined ejector pins 13 on the transverse section 211 and the longitudinal section 212 are cross-arranged in the extension direction, so that when demolding, the fixing parts 22 at both ends can be subjected to forces in different directions and slide out from the positioning groove 31, so that the product can be demolded smoothly and reduce damage to the product.

[0041] Furthermore, if Fig.10 As shown, the portion of the positioning pin 4 that extends outward after passing through the positioning hole 23 is an extension portion 41, and the height H3 of the extension portion 41 is 0.2 mm. By limiting the height of the portion extending to the surface of the hardware 2, it can limit the displacement of the hardware 2 and enhance the accuracy of mold closing without causing any hindrance to the mold closing. After the mold closing is completed, the front mold 7 will further press the hardware 2. At this time, the positioning pin 4 can move downward until it is flush with the surface of the mold cavity 11, and form a partial cavity wall of the injection mold cavity 11, making the product processing more beautiful.

[0042] Preferably, a plurality of ejector pins 6 are further provided in the mold cavity 11. In the embodiment of the present invention, there are three ejector pins 6, which are arranged in sequence and spaced apart along the two ends of the hardware 2 and abutted against the side of the hardware 2 away from the central axis L1. When the hardware 2 is placed in place, the ejector pin 6 moves upward from the rear mold 1 and is slightly higher than the surface of the hardware 2 and lower than the height of the extension portion 41, thereby preventing the hardware 2 from moving again in the direction of the second opening 33. In this way, the hardware 2 can be further fixed, and the positioning hole 23 can be ensured to correspond to the through hole 12, thereby improving the accuracy of the positioning pin 4 passing through the positioning hole 23, thereby improving the efficiency of injection molding. After the mold is closed, the ejector pin 6 will also move down until it is flush with the surface of the mold cavity 11. It should be noted that the end of each ejector pin 6 is adapted to the mold cavity 11, so when the ejector pin 6 is flush with the surface of the mold cavity 11, a smooth surface will be formed, which is convenient for improving the molding quality of the injection molded product.

[0043] Preferably, if Fig.11 As shown, at least two mold cavities 11 with the same structure are provided in the rear mold 1, and the two mold cavities 11 are symmetrically arranged, which can improve the mass production of the product and facilitate the needs of large-scale production. In the embodiment of the present invention, the glue inlets 71 are symmetrically arranged on one side of the hardware 2, that is, two glue inlets 71 are provided in the same mold cavity 11, which can shorten the flow distance of the plastic melt in the mold cavity 11, reduce pressure loss, thereby increasing the mold filling speed, ensuring that the plastic can quickly and evenly fill the entire mold cavity 11, reduce product defects, optimize the exhaust effect, and thus optimize the product molding quality and improve production efficiency.

[0044] In another embodiment, the hardware 2 can also be fixed on the front mold 7, then correspondingly, the positioning insert 3 and the positioning pin 4 are arranged in the front mold 7, but it should be noted that at this time, the positioning insert 3 is provided with one end of the positioning groove 31 facing the rear mold 1, that is, when the hardware 2 is fixed on the front mold 7, the position of the positioning insert 3 and the positioning pin 4 in the front mold 7 is symmetrical with the position of the positioning insert 3 and the positioning pin 4 in the rear mold 1. At this time, in order to facilitate the placement of the hardware 2, the mold of the present invention is not limited to vertical injection molding, but can also be horizontally arranged, so that the opening and closing of the front mold 7 and the rear mold 1 are arranged in the direction of left and right movement, while the structural arrangement of other components remains unchanged and will not be repeated here.

[0045] The working principle of the present invention is described in detail below:

[0046] During injection molding, the fixing parts 22 at both ends of the hardware 2 are respectively inserted from the side toward the second opening 33 of the positioning groove 31. When the hardware 2 is inserted in the positioning groove 31 and cannot move to the other side, the ejector pin 6 moves upward from the rear mold 1 and abuts against the side of the hardware 2 away from the central axis L1, so that the hardware 2 can no longer slide out of the second opening 33. Then, the positioning insert 3 moves upward and passes through the mold cavity 11 and the positioning hole 23 of the rear mold 1. After the front, back, left and right sides of the hardware 2 are fixed, the front mold 7 and the rear mold 1 can be closed for injection molding.

[0047] The innovation of the present invention lies in that positioning inserts are provided in the rear mold respectively corresponding to the two ends of the hardware, and a positioning groove is provided in the positioning insert, and fixing parts are respectively provided at the two ends of the hardware to be clamped with the positioning groove. The clamping connection between the fixing part and the positioning groove prevents the hardware from rebounding upward and deforming. At the same time, a positioning pin is also provided in the rear mold, and a positioning hole is provided on the hardware. The positioning pin passes through the positioning hole and extends outside the positioning hole, which can limit the left and right movement of the hardware, thereby fixing the hardware in various directions, and the fixing effect is better, thereby ensuring the accuracy of the mold closing and making the injection molding quality and efficiency higher.

[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementations that can be understood by those skilled in the art.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A positioning structure for a hardware set monument, comprising a rear mold (1), characterized in that: The rear mold (1) is provided with a mold cavity (11) and a hardware (2) placed in the mold cavity (11), the hardware (2) includes a connecting portion (21) and a fixing portion (22) arranged at both ends of the connecting portion (21), and a positioning insert (3) corresponding to the fixing portion (22) is provided in the rear mold (1) and at both ends of the hardware (2), the positioning insert (3) is provided with a positioning groove (31) and a first opening (32) connected to the positioning groove (31), and the fixing portion (22) is inserted and fixed in the positioning groove (31) through the first opening (32); the rear mold (1) is also provided with a positioning pin (4), and the hardware (2) is provided with a positioning hole (23), the positioning pin (4) passes through the rear mold (1) and extends into the mold cavity (11), so that at least a part of the positioning pin (4) is inserted into the positioning hole (23).

2. According to the positioning structure of a hardware set monument as claimed in claim 1, it is characterized in that: The side wall of the positioning insert (3) is provided with a second opening (33) adjacent to the first opening (32), and the second opening (33) is communicated with the positioning groove (31).

3. According to claim 2, a positioning structure of a hardware set monument is characterized in that: The first opening (32) and the second opening (33) are both provided with chamfers (34) which have a guiding function for the installation of the hardware (2).

4. According to the positioning structure of a hardware set monument as claimed in claim 3, it is characterized in that: The height inside the positioning groove (31) is H1, the height of the first opening (32) is H2, and H1<H2.

5. According to claim 2, a positioning structure of a hardware set monument is characterized in that: Two hardware parts (2) are arranged in the mold cavity (11), and the two hardware parts (2) are symmetrically arranged along the central axis L1. A connecting insert (5) is connected between the two positioning inserts (3) corresponding to the positions of the two hardware parts (2).

6. The positioning structure of a hardware set monument according to claim 5, characterized in that: The connecting insert (5) closes the second openings (33) on the two positioning inserts (3) that are opposite to each other, so that the other second opening (33) on the two positioning inserts (3) is arranged in a direction away from the connecting insert (5).

7. The positioning structure of a hardware set monument according to claim 1, characterized in that: The positioning hole (23) is arranged on the connecting portion (21) of the hardware (2).

8. The positioning structure of a hardware set monument according to claim 7, characterized in that: The portion of the positioning pin (4) that extends outward after passing through the positioning hole (23) is an extension portion (41), and a height H3 of the extension portion (41) is 0.2 mm.

9. The positioning structure of a hardware set monument according to claim 1, characterized in that: A plurality of ejector pins (6) are arranged in the mold cavity (11), and the ejector pins (6) are arranged in sequence and at intervals along the two ends of the hardware (2) to abut against a side of the hardware (2) away from the central axis L1.

10. The positioning structure of a hardware set monument according to claim 1, characterized in that: Two mold cavities (11) with the same structure are arranged in the rear mold (1), and the two mold cavities (11) are symmetrically arranged.

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