Die exhaust structure
By designing an alternating arrangement of inclined grooves and fixing inserts in the mold, the problem of fixing the mold venting inserts is solved, achieving a stable connection and simplifying disassembly and assembly, thereby improving the efficiency of mold injection molding production and product quality.
Patent Information
- Application Number
- CN202520291578.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-02-24
AI Technical Summary
In injection molding production, especially for products with funnel-like shapes, trapped air is difficult to expel, leading to problems such as product burning, short shots, and low yield. Furthermore, existing venting inserts are difficult to fix, are prone to falling off, or have complex structures that are inconvenient to disassemble.
A mold venting structure was designed, including a rear mold core and a venting insert. The rear mold core has a transversely penetrating venting groove and an inclined groove. A fixed insert is slidably connected in the inclined groove. The cross-section of the fixed insert gradually decreases, and an inclined surface is provided on the side away from the venting insert to form a right-angled trapezoidal structure. The fixed insert and the inclined groove are staggered. The venting insert is fixed by interference fit, which simplifies the structure and improves the convenience of disassembly and assembly.
This achieves a stable connection for the exhaust inserts, preventing them from falling off, simplifying the assembly and disassembly process, improving product molding quality and yield, and reducing costs and complexity.
Smart Images
Figure CN223750156U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to mould technical field, and specifically relates to a mould exhaust structure. BACKGROUND
[0002] In mould injection production, gas trapping is a common and difficult to solve problem, if gas trapping cannot be discharged in time, gas trapping is extruded and temperature rises, which can burn the product, even can cause the product short shot, cannot be formed, thereby causing the low yield of product, and not mass production.
[0003] And when the product has the feature of similar funnel shape, gas trapping is usually at the end of funnel, so that exhaust is more difficult, in addition, when there is an inner row in the rear mould insert, the exhaust insert cannot be fixed like the ordinary exhaust insert, thereby causing that the exhaust insert is difficult to fix, is easy to fall off, or the fixed structure is complex and inconvenient to disassemble. UTILITY MODEL CONTENTS
[0004] (1) technical problem to be solved
[0005] The utility model provides a mould exhaust structure, aims at solving the difficult problem of exhaust insert fixation in prior art.
[0006] (2) technical scheme
[0007] The utility model provides a mould exhaust structure, including rear mould and exhaust insert, be equipped with the exhaust groove that transversely penetrates rear mould in rear mould, exhaust insert is arranged in the exhaust groove, the end of rear mould is equipped with the recessed groove body to the inside, the groove body with exhaust insert intercommunication, be equipped with the chute with exhaust groove intercommunication in rear mould, slidingly connected with fixed insert that chute is matched with in the chute, fixed insert includes A end and B end, the cross section S in fixed insert gradually decreases from A end to B end.
[0008] Further, one side of the fixed insert away from the exhaust insert is provided with a slope, so that the fixed insert as a whole presents a right-angled trapezoidal structure.
[0009] Further, the slope gradually deviates from the central axis L1 from the A end to the B end of the fixed insert.
[0010] Further, the extension directions of the exhaust groove and the chute are arranged staggeredly.
[0011] Further, the exhaust insert includes a plurality of insert pieces arranged in sequence, and an exhaust gap is arranged between the two adjacent insert pieces.
[0012] Further, the middle part of the exhaust insert is provided with an arc surface matched with the groove body.
[0013] Further, at least part of the exhaust insert extends into the chute, so that the exhaust insert and the fixed insert abut in interference.
[0014] Further, both ends of the exhaust insert are adapted to the outer wall of the back core.
[0015] Further, the end of the back core is provided with a locking member extending towards the exhaust insert, and the locking member is detachably connected with the exhaust insert.
[0016] Further, the back core is provided with two left-right symmetrical back cores, and a glue feeding channel is arranged between the two back cores, and the glue feeding channel is in communication with the side wall of the two back cores.
[0017] Compared with the prior art, the utility model has the advantages that:
[0018] The fixed insert abuts with the bottom end of the exhaust insert in interference, and the fixed insert is provided with a slope, so that the area of the cross section S in the fixed insert gradually decreases from the A end to the B end, so that the fixed insert is not easy to fall off in the chute, and the fixed insert can also strengthen the fixing effect on the exhaust insert, and the structure is simple, convenient to disassemble and assemble and has higher practicality. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 It is the overall structure schematic view of the utility model.
[0020] Figure 2 It is the longitudinal stereoscopic view of the utility model.
[0021] Figure 3 It is the structure schematic of the fixed insert of the utility model Figure 1 .
[0022] Figure 4 It is the structure schematic of the fixed insert of the utility model Figure 2 .
[0023] Figure 5 It is the overall horizontal cross-sectional view of the utility model.
[0024] Figure 6 It is the structure schematic of the exhaust insert of the utility model.
[0025] Figure 7 It is the overall longitudinal cross-sectional view of the utility model.
[0026] Figure 8 It is the schematic diagram of hot melt flow in the injection molding channel of the utility model.
[0027] Fig. 1 is a rear mold core, 11 is a locking piece, 12 is a glue inlet channel, 2 is an exhaust insert, 21 is an insert piece, 22 is an exhaust gap, 23 is a camber surface, 3 is an exhaust groove, 4 is a groove body, 5 is an inclined groove, 6 is a fixed insert, 61 is an inclined surface. DETAILED DESCRIPTION
[0028] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.
[0029] As shown in the drawings, Figures 1-8 The utility model discloses a mold exhaust structure, including rear mold core 1 and exhaust insert 2, be equipped with the exhaust groove 3 that traverses rear mold core 1 in rear mold core 1, exhaust insert 2 sets up in exhaust groove 3, the end of rear mold core 1 is equipped with the groove body 4 that recesses inwards, the groove body 4 with exhaust insert 2 intercommunication, namely the exhaust structure that the utility model designs is applicable to the situation that the product has the reverse buckling, here the position that the groove body 4 with exhaust insert 2 intercommunication is usually the end of injection molding, namely when injection molding, hot melt will flow along the injection molding path, and finally converges in the end, and the end is the position of gas trapping, to avoid the product material shortage, scorching or broken hole and other defects caused by gas trapping, need to exhaust, and the exhaust mode structure of prior art to the product with reverse buckling is more complex, and when cleaning, replacement, disassembly and assembly are inconvenient, and are more prone to sliding off, for this, the rear mold core 1 in the utility model is equipped with the inclined groove 5 that communicates with the exhaust groove 3, the inclined groove 5 is also set up traversing rear mold core 1, wherein, the inclined groove 5 is slidably connected with the fixed insert 6 that matches the inclined groove 5, the fixed insert 6 and the bottom end of exhaust insert 2 abut, whereby the position of exhaust insert 2 can be fixed, to prevent it from loosening and falling off.
[0030] Specifically, as shown in the drawings, Figure 3 The fixed insert 6 includes A end and B end, the area of the cross section S in the fixed insert 6 gradually decreases from A end to B end, so that the fixed insert 6 is more stable when inserted into the inclined groove 5 and is not easy to displace and fall off, thereby further fixing the firmness of the exhaust insert 2 and making the injection molding effect better.
[0031] Further, as shown in the drawings, Figure 4As shown, the fixed insert 6 away from the exhaust insert 2 side is provided with inclined surface 61, the inclined surface 61 from the fixed insert 6 B end to A end direction gradually deviate from the central axis L1, make the fixed insert 6 overall is right trapezoidal structure, with the traditional use round pin to fix exhaust insert 2 is different, the fixed insert 6 wall for block structure can prevent its rotation, make the fixed insert 6 with the chute 5 connection more firm, and in the fixed insert 6 away from the exhaust insert 2 side on the setting inclined surface 61 can facilitate disassembly, assembly, on the one hand, the fixed insert 6 in the chute 5 when, by the inclined surface 61 structure is affected, it with the chute 5 will be more and more close, the excess connection between the two, thus can avoid to additionally use pin to fix the fixed insert 6, thereby reduce the use of parts, cost reduction, structure is simpler and more practical, when the exhaust insert 2 is replaced, cleaning, disassembly is also more convenient, higher efficiency, on the other hand, because the fixed insert 6 with the exhaust insert 2 bottom abut, therefore the fixed insert 6 more to A end when advancing, will simultaneously to the exhaust insert 2 exert upward force, thereby make the exhaust insert 2 with the exhaust groove 3 connection more stable.
[0032] Further, as shown in the drawings, Figure 5 The exhaust groove 3 and the extension direction of the chute 5 are arranged staggered, in the embodiment of the utility model, the exhaust groove 3 and the chute 5 are arranged perpendicular, thus the exhaust insert 2 and the fixed insert 6 are also arranged perpendicular, when the fixed insert 6 abuts with the exhaust insert 2 upward, the force of the exhaust insert 2 will be more uniform and balanced.
[0033] Preferably, to improve the fixed insert 6 to the exhaust insert 2 fixed effect, the exhaust groove 3 and the chute 5 at least partially coincide in the intersection position, so when the exhaust insert 2 is installed into the exhaust groove 3, at least part of the exhaust insert 2 extends into the chute 5, with the fixed insert 6 gradually moving along the B end, the exhaust insert 2 and the fixed insert 6 can be in interference abutment.
[0034] Further, as shown in the drawings, Figure 6 The exhaust insert 2 includes a plurality of insert pieces 21 arranged in sequence, and the adjacent two insert pieces 21 are tightly fitted and provided with exhaust gaps 22. When the gas converges at the exhaust insert 2, the gas can be discharged from the exhaust gaps 22 between the adjacent two insert pieces 21 or the gap between the exhaust insert 2 and the rear mold core 1, and finally discharged from the exhaust hole to the outside of the mold.
[0035] Since the rear mold core 1 has an inwardly recessed groove 4, which is connected to the venting insert 2, the middle part of the venting insert 2 (i.e., the connection between the venting groove 3 and the groove 4) has an arc surface 23 that matches the groove 4. The arc surface 23 also participates in the molding of the injection molded product. Therefore, the stability of the venting insert 2 has a certain impact on the quality of the product molding effect. In this utility model, the venting insert 2 can be effectively avoided by using the fixed insert 6 with a single-sided slope to fix the venting insert 2.
[0036] Furthermore, the two ends of the venting insert 2 are adapted to the outer wall of the rear mold core 1, which facilitates the assembly and disassembly of the venting insert 2.
[0037] Preferably, such as Figure 7 As shown, to further secure the venting insert 2 and prevent deformation of each insert piece 21 in the left and right directions, a locking member 11 extending toward the venting insert 2 is provided at the end of the rear mold core 1. The locking member 11 passes through the venting insert 2 and is detachably connected to the venting insert 2 to further restrict the space for left and right movement of each insert piece 21. In addition, when gas is discharged from the venting gap 22 of the venting insert 2, it can also be discharged along the gap between the locking member 11 and the rear mold core 1, thus eliminating the need for additional venting holes.
[0038] Preferably, such as Figure 8 As shown, two rear mold cores 1 are symmetrically arranged on the left and right sides, and a glue injection channel 12 is provided between the two rear mold cores 1. The glue injection channel 12 is connected to the side wall of the two rear mold cores 1 respectively to improve injection molding efficiency.
[0039] The following is a detailed explanation of the working principle of this utility model:
[0040] During injection molding, the hot melt enters from the side wall of the rear mold core 1, causing the gas to converge at the groove 4. Under compression, the gas flows out through the gap of the venting insert 2, which is connected to the groove 4, and finally exits from the gap between the locking member 11 and the rear mold core 1. The venting insert 2 will not move or fall off under the interference fit of the fixing insert 6.
[0041] The innovation of this utility model lies in the provision of a fixing insert that is interference-fitted with the bottom end of the exhaust insert, and the fixing insert has an inclined surface, so that the area of the cross-section S inside the fixing insert gradually decreases from end A to end B, thereby making it difficult for the fixing insert to fall off in the inclined groove. At the same time, it can also strengthen the fixing effect of the fixing insert on the exhaust insert. The structure is simple, easy to disassemble and assemble, and more practical.
[0042] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.
[0043] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be considered as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be considered as limiting the claims involved.
Claims
1. A mold exhaust structure characterized by, The application relates to a rear die core (1) and an exhaust insert (2), the rear die core (1) is internally provided with an exhaust groove (3) transversely penetrating the rear die core (1), the exhaust insert (2) is arranged in the exhaust groove (3), the end of the rear die core (1) is provided with a groove body (4) recessed inward, the groove body (4) is communicated with the exhaust insert (2), the rear die core (1) is internally provided with an inclined groove (5) communicated with the exhaust groove (3), the inclined groove (5) is slidably connected with a fixed insert (6) matched with the inclined groove (5), the fixed insert (6) comprises an A end and a B end, and the cross section S in the fixed insert (6) gradually decreases from the A end to the B end.
2. The mold venting structure of claim 1, wherein The side, away from the exhaust insert (2), of the fixed insert (6) is provided with an inclined surface (61), so that the fixed insert (6) has a straight trapezoidal structure as a whole.
3. The mold venting structure of claim 2, wherein The inclined surface (61) gradually deviates from the central axis L1 from the B end to the A end of the fixed insert (6).
4. The mold venting structure of claim 3, wherein The exhaust groove (3) and the extension direction of the inclined groove (5) are arranged in a staggered mode.
5. The mold venting structure of claim 1, wherein The exhaust insert (2) comprises a plurality of insert pieces (21) arranged in sequence, and an exhaust gap (22) is arranged between two adjacent insert pieces (21).
6. The mold venting structure of claim 5, wherein The middle part of the exhaust insert (2) is provided with an arc surface (23) matched with the groove body (4).
7. The mold venting structure of claim 6, wherein At least part of the exhaust insert (2) extends into the inclined groove (5), so that the exhaust insert (2) is in interference abutment with the fixed insert (6).
8. The mold venting structure of claim 7, wherein The two ends of the exhaust insert (2) are matched with the outer wall of the rear die core (1).
9. The mold venting structure of claim 8, wherein The end of the rear die core (1) is provided with a locking piece (11) extending towards the exhaust insert (2), and the locking piece (11) is detachably connected with the exhaust insert (2).
10. The mold venting structure of claim 1, wherein The rear die core (1) is arranged in a left-right symmetrical mode and two rear die cores (1) are arranged, and a glue feeding channel (12) is arranged between the two rear die cores (1), and the glue feeding channel (12) is communicated with the side walls of the two rear die cores (1) respectively.