Anti-fracture injection mold
By setting the bone position groove and chamfer structure in the glue feeding channel of the injection mold, the problem of long cooling time and fracture of the product and residual parts in the injection mold is solved, and the effect of shortening the cooling time and improving the product pass rate is achieved.
Patent Information
- Application Number
- CN202421112907.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-05-20
AI Technical Summary
The cooling time of the products and residual parts in the injection mold is long, and it is prone to fracture, resulting in low production efficiency and unqualified product.
A fracture-proof injection mold was designed. By setting a bone position groove in the glue inlet channel, the contact area between the glue material and the mold kernel is increased, the cooling time is shortened, and the connection area is increased through the chamfered structure, and the product and residue are improved. connection density.
It effectively shortens the cooling time of the rubber, improves production efficiency, and prevents breakage by reinforced connections, improving the product pass rate.
Smart Images
Figure CN222271113U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to an anti-fracture injection mold. Background Art
[0002] In the process of producing products by injection molds, hot melt rubber is injected into the molding cavity through the rubber inlet channel. The molded product is obtained after the hot melt rubber in the molding cavity is cooled and formed. However, since there is rubber remaining in the rubber inlet channel, a residual part is formed after cooling. The product is closely connected to the residual part, and the residual part needs to be removed in subsequent processing to obtain a finished product.
[0003] However, after the injection molding is completed, the temperature of the hot melt rubber is still high, and the required cooling time is long. If the cooling time is not enough and demolding is performed, the connection between the residual part and the product is very likely to break because the rubber has not hardened, causing the residual part to break and remain on the mold core. It can only be removed manually, resulting in unsuccessful demolding and reduced production efficiency.
[0004] In addition, the breakage between the product and the residual part will cause gaps in the product, resulting in unqualified products and reducing the product qualification rate.
[0005] Therefore, in view of the problem that the cooling time of the product and the residual part in the current injection mold is long and there is breakage, it is urgent to develop a new machine or new technology to solve the above problems. Utility Model Content
[0006] The utility model aims to provide an anti-fracture injection mold to solve the problem that the cooling time of the product and the residual part in the current injection mold is long and there is fracture.
[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0008] A fracture-proof injection mold comprises an upper mold plate, a lower mold plate and a hot runner plate. The hot runner plate, the upper mold plate and the lower mold plate are arranged in sequence from top to bottom. An upper mold core is installed on the upper mold plate, and a lower mold core is installed on the lower mold plate. A cavity is arranged between the upper mold core and the lower mold core. A nozzle abutting against the upper mold core is arranged through the upper mold plate. The nozzle has a glue injection port. A hot runner is arranged on the hot runner plate. One end of the hot runner is connected to the glue injection port of the nozzle. A glue inlet channel is provided on the upper mold core. The glue injection port, the glue inlet channel and the cavity are connected. The glue in the hot runner flows into the cavity through the glue injection port via the glue inlet channel. The end of the glue inlet channel connected to the cavity is a glue outlet. A bone position groove is provided at the glue outlet of the glue inlet channel, and the bone position groove is connected to the cavity.
[0009] Furthermore, the glue inlet channel is provided with two bone position grooves at the glue outlet, and the two bone position grooves are symmetrically arranged.
[0010] Furthermore, the cross section of the bone slot is triangular.
[0011] Furthermore, one end of the bone groove extending to the inner wall of the glue inlet channel is the first end, and the distance from the first end to the lower surface of the upper mold core along the glue inlet channel is 3 mm to 5 mm.
[0012] Furthermore, one end of the bone groove extending to the lower surface of the upper mold core is the second end, and the shortest distance from the second end along the lower surface of the upper mold core to the edge of the glue outlet is 2 mm to 4 mm.
[0013] Furthermore, the distance between two opposite inner walls of the bone slot is 0.3 mm to 0.6 mm.
[0014] Furthermore, a chamfer structure is provided at the edge of the glue outlet.
[0015] Furthermore, the chamfered structure is a rounded corner, and the radius of the rounded corner is 0.4 mm to 0.8 mm.
[0016] Furthermore, the glue inlet channel is trumpet-shaped and expands outwards toward the cavity.
[0017] Furthermore, one end of the glue inlet channel communicating with the glue injection port is the glue inlet, and the cross-sectional area of the glue inlet is smaller than the cross-sectional area of the glue outlet.
[0018] The utility model has the beneficial effects of an anti-fracture injection mold: the contact area of the rubber material on the upper mold core is increased by the bone groove, the cooling time of the rubber material is shortened, and the production efficiency is improved; the bone groove makes the connection between the product body and the residual part tighter, and the qualified rate of the product body is improved. Therefore, not only the production efficiency is improved, but also the qualified rate of the product body is improved. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a cross-sectional view of the anti-fracture injection mold of Example 1 of the utility model.
[0020] Figure 2 for Figure 1 Enlarged cross-sectional view of point A in the middle.
[0021] Figure 3 This is a cross-sectional view of a rough product formed by the anti-fracture injection mold of Example 1 of the utility model.
[0022] Figure 4 for Figure 1 A partial cross-sectional view of the upper die core from another angle is shown.
[0023] Figure 5 This is a cross-sectional view of the anti-fracture injection mold of Example 2 of the utility model.
[0024] Figure 6 for Figure 5 Enlarged cross-sectional view at point B.
[0025] Figure 7 for Figure 6 Schematic diagram of the chamfer structure shown. DETAILED DESCRIPTION
[0026] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0027] The terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", "horizontal", etc. in the specification and claims of the utility model indicate directions or position relationships based on the directions or position relationships shown in the drawings, and are only for the clarity of expressing the technical solutions and the convenience of description, and therefore cannot be understood as limitations on the present application.
[0028] Embodiment 1:
[0029] See also Figure 1-Figure 2 An anti-fracture injection mold comprises an upper mold plate 20, a lower mold plate 30 and a hot runner plate 10, wherein the hot runner plate 10, the upper mold plate 20 and the lower mold plate 30 are arranged in sequence from top to bottom. An upper mold core 22 is installed on the upper mold plate 20, a lower mold core 31 is installed on the lower mold plate 30, and a cavity 40 is arranged between the upper mold core 22 and the lower mold core 31.
[0030] The upper mold plate 20 is penetrated by a nozzle 21 that abuts against the upper mold core 22, and the nozzle 21 has a glue injection port 211. The hot runner plate 10 is provided with a hot runner 11, and one end of the hot runner 11 is connected to the glue injection port 211 of the nozzle 21. The upper mold core 22 is provided with a glue inlet channel 221, and the glue injection port 211, the glue inlet channel 221, and the cavity 40 are connected. The glue in the hot runner 11 flows into the cavity 40 through the glue injection port 211 and the glue inlet channel 221.
[0031] One end of the glue inlet channel 221 communicating with the mold cavity 40 is a glue outlet 2212 . The glue inlet channel 221 is provided with a bone slot 2213 at the glue outlet 2212 . The bone slot 2213 is communicated with the mold cavity 40 .
[0032] See also Figure 1-Figure 3When the anti-fracture injection mold is closed, the rubber in the hot runner 11 is injected through the injection port 211 and fills the cavity 40, the rubber inlet channel 221 and the bone groove 2213; the bone groove 2213 increases the contact area of the rubber on the upper mold core 22, which can effectively shorten the cooling time of the rubber.
[0033] After the rubber material is cooled, the rubber material hardens in the mold cavity 40, the rubber inlet channel 221, and the bone position groove 2213 to form a product body 71, a residual portion 73, and a bone position 72. The product body 71, the residual portion 73, and the bone position 72 are connected to each other to form a rough product 70. In the subsequent processing of the rough product 70, the residual portion 73 and the bone position 72 need to be cut off to obtain the product body 71.
[0034] The bone position 72 is located at the connection between the product body 71 and the residual part 73, and plays a reinforcing role to prevent the residual part 73 from breaking from the product body 71 during the demolding process, thereby causing a gap in the product body 71 and the residual part 73 remaining on the lower mold core 31, affecting the production progress.
[0035] As described above, the anti-fracture injection mold proposed by the utility model increases the contact area of the rubber on the upper mold core 22 through the bone groove 2213, shortens the cooling time of the rubber, and improves the production efficiency; the bone groove 2213 makes the connection between the product body 71 and the residual part 73 tighter, thereby preventing the residual part 73 from breaking and remaining on the lower mold core 31, thereby improving the qualified rate of the product body 71. Therefore, not only the production efficiency is improved, but also the qualified rate of the product body 71 is improved.
[0036] See also Figure 2-Figure 3 The bone position groove 2213 may be provided with a plurality of them. In this embodiment, the glue inlet channel 221 is provided with two bone position grooves 2213 at the glue outlet 2212, and the two bone position grooves 2213 are symmetrically arranged. The two symmetrically arranged bone position grooves 2213 correspondingly make the rough product 70 have two symmetrically arranged bone positions 72, and the two symmetrically arranged bone positions 72 maximally reinforce the connection between the product body 71 and the residual part 73, thereby preventing the residual part 73 from breaking from the product body 71.
[0037] More specifically, the cross section of the bone slot 2213 is triangular, and the cross section of the bone slot 72 is also triangular, which can make the bone slot 72 more solid and stable.
[0038] One end of the bone groove 2213 extending to the inner wall of the glue feeding channel 221 is a first end 50 , and a distance L between the first end 50 and the lower surface of the upper mold core 22 along the glue feeding channel 221 is 3 mm to 5 mm.
[0039] The larger the distance L is, the larger the connection area between the bone position 72 and the residual part 73 is, which is more conducive to reinforcing the residual part 73. However, if the distance L is too large, the bone position 72 will be filled with more rubber, which will affect the cooling time of the rubber and waste the rubber. After many tests, the distance L is in the range of 3mm to 5mm, which is compatible with the requirements of reinforcement effect, rubber cooling time and production cost. Preferably, the distance L is 3.50mm to 4.25mm. Those skilled in the art can specifically set the distance L to 3.50mm, 3.75mm, 4.00mm, 4.15mm, 4.25mm, etc., and this is not a sole limitation.
[0040] One end of the bone slot 2213 extending to the lower surface of the upper mold core 22 is the second end 60 , and the shortest distance D from the second end 60 along the lower surface of the upper mold core 22 to the edge of the glue outlet 2212 is 2 mm to 4 mm.
[0041] The larger the distance D is, the larger the connection area between the bone position 72 and the product body 71 is, which is more conducive to reinforcing the connection between the residual part 73 and the product body 71. However, if the distance D is too large, it will also cause the bone position 72 to be filled with more rubber, affecting the cooling time of the rubber and wasting the rubber. After many tests, the distance D is in the range of 2mm to 4mm, which is compatible with the requirements of reinforcement effect, rubber cooling time and production cost. Preferably, the distance D is 2.20mm to 3.40mm. Those skilled in the art can specifically set the distance D to 2.20mm, 2.35mm, 2.65mm, 2.95mm, 3.40mm, etc., and this is not a sole limitation.
[0042] See also Figure 4 The distance T between the two opposite inner walls of the bone slot 2213 is 0.3 mm to 0.6 mm.
[0043] The larger the distance T is, the thicker the bone position 72 is, which is more conducive to reinforcing the connection between the residual portion 73 and the product body 71. However, if the distance T is too large, the bone position 72 will be filled with more rubber, which will affect the cooling time of the rubber and waste the rubber. After many tests, the distance T is in the range of 0.3mm to 0.6mm, which is compatible with the requirements of reinforcement effect, rubber cooling time and production cost. Preferably, the distance T is 0.40mm to 0.55mm. Those skilled in the art can specifically set the distance T to 0.40mm, 0.45mm, 0.50mm, 0.55mm, etc., and this is not the only limitation.
[0044] See also Figure 2 , the glue inlet channel 221 can be in a straight tube shape, a trumpet shape, etc. In the present embodiment, the glue inlet channel 221 is in a trumpet shape and expands outwardly in the direction of the cavity 40. More specifically, one end of the glue inlet channel 221 that is connected to the glue injection port 211 is the glue inlet port 2211, and the cross-sectional area of the glue inlet port 2211 is smaller than the cross-sectional area of the glue outlet 2212. The glue inlet channel 221 is in a trumpet shape, which can increase the cross-sectional area of the glue outlet 2212, thereby increasing the cross-sectional area of the connection between the residual portion 73 and the product body 71, thereby making the connection between the residual portion 73 and the product body 71 more solid, achieving an anti-fracture effect.
[0045] Embodiment 2:
[0046] An anti-fracture injection mold, whose structure is similar to the structure of the anti-fracture injection mold in Example 1, except that:
[0047] See also Figure 3 and Figure 5-Figure 7 The edge of the glue outlet 2212 is provided with a chamfered structure 2214. The chamfered structure 2214 can further increase the cross-sectional area of the glue outlet 2212, thereby increasing the cross-sectional area of the connection between the residual part 73 and the product body 71, thereby making the connection between the residual part 73 and the product body 71 stronger, achieving an anti-fracture effect.
[0048] Furthermore, the chamfered structure 2214 is a rounded corner, and the radius R of the rounded corner is 0.4 mm to 0.8 mm.
[0049] The larger the radius R is, the larger the cross-sectional area of the connection between the residual portion 73 and the product body 71 is, which is more conducive to preventing the residual portion 73 and the product body 71 from breaking. However, if the radius R is too large, it will also cause the connection between the residual portion 73 and the product body 71 to be filled with more rubber, which will affect the cooling time of the rubber and also waste the rubber. After many tests, the radius R is in the range of 0.4mm to 0.8mm, which is compatible with the requirements of anti-fracture effect, rubber cooling time, and production cost. Preferably, the radius R is 0.45mm to 0.60mm. Those skilled in the art can specifically set the radius R to 0.45mm, 0.50mm, 0.55mm, 0.60mm, etc., and this is not a sole limitation.
[0050] The utility model has the beneficial effect of an anti-fracture injection mold: it realizes preventing the residual portion 73 from being fractured with the product body 71 , which not only improves the production efficiency, but also improves the qualified rate of the product body 71 .
[0051] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. An anti-fracture injection mold, comprising an upper mold plate, a lower mold plate and a hot runner plate, wherein the hot runner plate, the upper mold plate and the lower mold plate are arranged in sequence from top to bottom, an upper mold core is installed on the upper mold plate, a lower mold core is installed on the lower mold plate, and a cavity is arranged between the upper mold core and the lower mold core, characterized in that: The upper mold plate is provided with a nozzle abutting against the upper mold core, the nozzle has a glue injection port, the hot runner is provided on the hot runner plate, one end of the hot runner is connected to the glue injection port of the nozzle, a glue inlet channel is provided on the upper mold core, the glue injection port, the glue inlet channel and the cavity are connected, the glue in the hot runner flows into the cavity through the glue injection port and the glue inlet channel, the end of the glue inlet channel connected to the cavity is a glue outlet, the glue inlet channel is provided with a bone groove at the glue outlet, and the bone groove is connected to the cavity.
2. The anti-fracture injection mold according to claim 1, characterized in that: The glue inlet channel is provided with two bone slots at the glue outlet, and the two bone slots are symmetrically arranged.
3. The anti-fracture injection mold according to claim 1, characterized in that: The cross section of the bone slot is triangular.
4. The anti-fracture injection mold according to claim 3, characterized in that: One end of the bone groove extending to the inner wall of the glue inlet channel is the first end, and the distance from the first end to the lower surface of the upper mold core along the glue inlet channel is 3 mm to 5 mm.
5. The anti-fracture injection mold according to claim 3, characterized in that: One end of the bone slot extending to the lower surface of the upper mold core is the second end, and the shortest distance from the second end along the lower surface of the upper mold core to the edge of the glue outlet is 2 mm to 4 mm.
6. The anti-fracture injection mold according to claim 3, characterized in that: The distance between the two opposite inner walls of the bone slot is 0.3 mm to 0.6 mm.
7. The anti-fracture injection mold according to claim 1, characterized in that: The edge of the glue outlet is provided with a chamfer structure.
8. The anti-fracture injection mold according to claim 7, characterized in that: The chamfered structure is a rounded corner, and the radius of the rounded corner is 0.4 mm to 0.8 mm.
9. The anti-fracture injection mold according to any one of claims 1 to 8, characterized in that: The glue inlet channel is trumpet-shaped and expands outwards toward the cavity.
10. The anti-fracture injection mold according to claim 9, characterized in that: One end of the glue inlet channel communicating with the glue injection port is the glue inlet, and the cross-sectional area of the glue inlet is smaller than the cross-sectional area of the glue outlet.