Injection mold convenient for part molding

Abstract

The utility model relates to the technical field of injection molds, and provides an injection mold convenient for part molding, the injection mold comprises a fixed mold set and a movable mold set matched with the fixed mold set, a shaping cavity used for shaping molten plastic is formed between the fixed mold set and the movable mold set, and an injection molding channel is formed in the surface, away from the movable mold set, of the fixed mold set; two discharging channels are formed in the surface, close to the movable module, of the fixed module, the two discharging channels are the first discharging channel and the second discharging channel correspondingly, and the first discharging channel and the second discharging channel communicate with the injection molding channel and are arranged on the two sides of the injection molding channel correspondingly; the first discharging channel is arranged in a strip-shaped groove of the first groove shaping area and is close to the first mounting shaping area, and the second discharging channel is arranged in a strip-shaped groove between the first groove shaping area and the second groove shaping area. The injection mold has the beneficial effect that the quality of injection molding parts is improved.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to an injection mold that facilitates part molding. Background Art

[0002] The molding of injection molded parts usually includes several steps, including mold closing, injection, pressure holding, cooling, mold opening, and product removal. The production process needs to be processed in the injection mold, which is a tool for producing plastic products and also a tool for giving plastic products a complete structure and precise size. Injection molds can mass-produce certain plastic parts with complex shapes. By injecting the heated and melted plastic into the mold cavity under high pressure from the injection molding machine, the formed plastic products can be obtained after cooling and solidification.

[0003] In the related art, when injection molding is performed on some longer molds, multiple gates or one gate are usually set along the length direction of the mold. However, in the prior art, injection molding is usually performed into multiple gates at the same time, so that the entire product can be quickly formed in the mold cavity.

[0004] Among them, for some irregularly arranged injection molded parts, refer to Figure 1 The injection molded part includes a first mounting portion, a first groove portion, a second groove portion and a second mounting portion along its length direction, and the corresponding mold is provided with a first mounting molding area, a first groove molding area, a second groove molding area and a second mounting molding area, and the grooves therein will be provided with a number of strip grooves arranged vertically and horizontally on the mold, and the protruding parts between the intersecting strip grooves form the grooves formed in the injection molded part, and the molten plastic is injected into each molding area through the gate to form the required injection molded part. When the groove length of the first groove area is longer than the groove length of the second groove area, the spacing between adjacent strip grooves is different at this time, and the complexity of the first mounting molding area is higher than the complexity of the second mounting molding area, if injection molding is performed through a number of gates with relatively uniform distribution and the same discharge amount, the flow rate of the injection molded part corresponding to each gate will be different, and the same casting time may cause extrusion or lack of material, which affects the quality of the injection molded part, so further improvement is needed. Utility Model Content

[0005] In order to improve the quality of injection molded parts, the present application provides an injection mold that facilitates part molding.

[0006] The present application provides an injection mold that facilitates part molding, which adopts the following technical solution:

[0007] An injection mold for facilitating part molding comprises a fixed mold group and a movable mold group matched with the fixed mold group, a molding cavity for molding molten plastic is formed between the fixed mold group and the movable mold group, an injection channel is provided on the surface of the fixed mold group away from the movable mold group, and two discharge channels are provided on the surface of the fixed mold group close to the movable mold group, the two discharge channels are respectively a first discharge channel and a second discharge channel, the first discharge channel, the second discharge channel and the injection channel are connected, and are respectively arranged on both sides of the injection channel; the first discharge channel is arranged in a strip groove of a first groove molding area, and is arranged close to a first installation molding area, the second discharge channel is arranged in a strip groove between the first groove molding area and the second groove molding area, and the caliber of the first discharge channel at the discharge end is larger than the caliber of the second discharge channel at the discharge end.

[0008] By adopting the above technical solution, since the complexity of the first installation and molding area is greater than that of the second installation and molding area, the time spent in the first installation and molding area is more than that of the second installation and molding area. The first discharge channel is arranged close to the first installation and molding area, and the caliber of the first discharge channel at the discharge end is larger than the caliber of the second discharge end. The molten plastic discharged from the second discharge channel can flow into the first installation and molding area before flowing into the second installation and molding area. After a certain period of time, it flows into the second installation and molding area. When the amount of molten plastic in the second molding area is reached, the amount of molten plastic in the first installation and molding area is also relatively reached. It is relatively easy to process by providing two discharge channels, and it is relatively easy to control the amount of molten plastic required for each part, reducing the possibility of extrusion or shortage of materials, so as to improve the quality of the injection molded parts.

[0009] Preferably, the distance between the first discharge channel and the injection channel is smaller than the distance between the second discharge channel and the injection channel.

[0010] By adopting the above technical scheme, the spacing between the first discharge channel, the second discharge channel and the injection channel is set differently, so that the two molten plastics flowing through the first discharge channel and the second discharge channel to enter the molding cavity have a sequence. Since the groove widths in the first groove molding area and the second groove molding area are different, the molten plastic that first enters the molding cavity through the first discharge channel is injected into the first groove molding area and flows to the strip grooves on both sides. After flowing for a certain range, it then enters the more complex first molding area. When the molten plastic flows in the first groove molding area, a part of the molten plastic that enters the molding cavity from the second discharge channel flows to the first groove molding area and meets the previous molten plastic.

[0011] Preferably, the diameter of the discharge channel at the discharge end is smaller than the diameter at the feed end.

[0012] Preferably, the diameter of the discharge channel gradually decreases along its radial direction toward the discharge end.

[0013] By adopting the above technical solution, the air in the molten plastic when it passes through the discharge channel and enters the molding cavity is reduced, thereby reducing the possibility of voids inside the molded parts after molding.

[0014] Preferably, a connecting channel parallel to the upper surface of the fixed die group is provided in the fixed die group, the connecting channel is connected to the first discharge channel, the second discharge channel and the injection channel, and the connecting channel is inclined along the length direction of the fixed die group.

[0015] By adopting the above technical solution, since the amount and time of the molten plastic flowing from the first discharge channel and the second discharge channel into the molding cavity may have errors in actual practical use, a connecting channel parallel to the upper surface of the fixed mold group is provided, and the connecting channel is inclined along the length direction of the fixed mold group to provide a retention space between the first discharge channel and the second discharge channel for convection flow, so as to reduce the possibility of extrusion or shortage of the molten plastic injected into the molding cavity, so as to improve the quality of the injection molded part.

[0016] Preferably, the cross section of the bottom inner wall of the connecting channel along the length direction is arranged in an arc shape.

[0017] By adopting the above technical solution, the cross section of the bottom inner wall of the connecting channel in the extended length direction is arranged to be arc-shaped, so as to reduce the adhesion of excess molten plastic to the bottom inner wall of the connecting channel.

[0018] Preferably, the connecting channel comprises a material receiving end flowing through the injection channel and inclined portions arranged on both sides of the material receiving end, and the bottom wall of the material receiving end is located above the bottom wall of the inclined portion.

[0019] By adopting the above technical solution, the bottom wall of the material receiving end is located above the bottom wall of the inclined portion, so that the process of entering the material discharging channel from the injection channel can be smoother.

[0020] Preferably, the discharge ends of the first discharge channel and the second discharge channel are arranged in the middle of the molding cavity, and the inclined portions are respectively a first inclined portion connected to the first discharge channel and a second inclined portion connected to the second discharge channel, and an inclination angle formed between the length direction of the second inclined portion and the length direction of the fixed mold group is smaller than the inclination angle of the first inclined portion.

[0021] By adopting the above technical scheme, since the inclined portions are arranged on both sides of the material receiving end, the first discharge channel and the second discharge channel are arranged on both sides of the injection channel and are connected. At this time, the first discharge channel is connected to the first inclined portion, and the second discharge channel is connected to the second inclined portion. Since the spacing between the first discharge channel and the injection channel is smaller than the spacing between the second discharge channel and the injection channel, the length of the corresponding first inclined portion will be smaller than the length of the second inclined portion. In order to improve the uniformity of the flow of the molten plastic, the discharge ends of the first discharge channel and the second discharge channel are both arranged in the middle of the molding cavity, and the inclination angle of the inclined portion is changed accordingly, so that the inclination angle formed between the length direction of the second inclined portion and the fixed mold group is smaller than the inclination angle formed between the length direction of the first inclined portion and the length direction of the fixed mold group.

[0022] In summary, the utility model has the following beneficial effects:

[0023] The first discharge channel is arranged close to the first installation and molding area, and the diameter of the first discharge channel at the discharge end is larger than the diameter of the second discharge end. Before the molten plastic discharged from the second discharge channel flows to the second installation and molding area, it can flow into the first installation and molding area, so that the discharge time on both sides of the discharge channel is relatively uniform. In addition, two discharge channels are arranged, which is relatively easy to process and relatively easy to control the amount of molten plastic required for each part, thereby reducing the possibility of extrusion or shortage of material, so as to improve the quality of the injection molded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the injection molded parts in the embodiment of the present application;

[0025] Figure 2 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0026] Figure 3 is a schematic cross-sectional structure diagram of an embodiment of the present application;

[0027] Figure 4 is a schematic diagram of the side view structure of the fixed mold cavity in an embodiment of the present application;

[0028] Figure 5 It is a schematic diagram of the structure of the discharge channel and the connecting channel in the embodiment of the present application;

[0029] Figure 6 It is a schematic diagram of the structure in which the discharge channel is located at the discharge end in the embodiment of the present application.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. Injection molded part; 11. First mounting portion; 12. First groove portion; 13. Second groove portion; 14. Second mounting portion; 15. Groove; 2. Fixed mold assembly; 21. Injection end; 211. Injection channel; 22. Fixed mold seat; 23. Fixed mold; 3. Moving mold assembly; 4. Fixed mold cavity; 41. First mounting molding area; 42. First groove molding area; 43. Second groove molding area; 44. Second mounting molding area; 5. Discharging channel; 51. First discharging channel; 52. Second discharging channel; 6. Connecting channel; 61. Receiving end; 62. First inclined portion; 63. Second inclined portion. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-6 , further details of this application are given.

[0032] The embodiment of the present application discloses an injection mold that facilitates part molding.

[0033] Example:

[0034] An injection mold that facilitates part molding, refer to Figure 1 , used to produce an injection molded part 1. It should be noted that the injection molded part 1 specifically includes a first mounting portion 11, a first groove portion 12, a second groove portion 13 and a second mounting portion 14 along its length direction. The grooves 15 in the first groove portion 12 and the second groove portion 13 are formed mainly by providing a plurality of strip grooves arranged vertically and horizontally on the mold, and the protruding parts between the intersecting strip grooves form the grooves 15 in the injection molded part 1. The molten plastic is injected into each molding area through the gate to form the desired injection molded part 1. The length of the groove 15 in the second groove portion 13 is less than the length of the groove 15 in the first groove portion 12, and the complexity of the first mounting portion 11 is higher than that of the second mounting portion 14.

[0035] Reference Figure 2 , Figure 3 The injection mold includes a fixed mold group 2 and a movable mold group 3 matched with the fixed mold group 2, wherein the fixed mold group 2 includes an injection end 21, a fixed mold base 22 abutting against the injection end 21, a fixed mold 23 installed on the fixed mold base 22, and two side molds (not shown in the figure) arranged on both sides of the fixed mold 23, and a molding cavity for molding the molten plastic is formed between the fixed mold 23, the two side molds and the movable mold group 3.

[0036] Reference Figure 4 , corresponding to the injection molded part 1, the fixed mold cavity 4 is divided into a first installation molding area 41, a first groove molding area 42, a second groove molding area 43 and a second installation molding area 44 along its length direction.

[0037] Reference Figure 5 , Figure 6, wherein the injection end 21 is used to inject molten plastic, and the injection end 21 is provided with an injection channel 211 through the surface away from the fixed mold seat 22, and the fixed mold seat 22 and the fixed mold 23 are both provided with a discharge channel 5 connected with the injection channel 211. In this embodiment, the caliber of the discharge channel 5 at the discharge end is smaller than the caliber at the feed end, and the diameter of the discharge channel 5 gradually decreases along its own radial direction toward the discharge end. The discharge channel 5 is connected to the molding cavity, and there are two discharge channels 5, which are the first discharge channel 51 and the second discharge channel 52, respectively. The discharge ends of the first discharge channel 51 and the second discharge channel 52 are both arranged in the middle of the molding cavity. In this embodiment, the caliber of the first discharge channel 51 at the discharge end is larger than the caliber of the second discharge channel 52 at the discharge end. The first discharge channel 51 and the second discharge channel 52 are both connected with the injection channel 211, and are respectively arranged on both sides of the injection channel 211.

[0038] As for the specific positions of the two discharge channels 5 on the fixed mold 23, the first discharge channel 51 is arranged in the strip groove of the first groove molding area 42 and is arranged close to the first installation molding area 41, and the second discharge channel 52 is arranged in the strip groove between the first groove molding area 42 and the second groove molding area 43.

[0039] Regarding the connection between the discharge channel 5 and the injection channel 211, in this embodiment, a connecting channel 6 is provided on the surface of the fixed mold base 22 near the injection end 21 along its own length direction, and the connecting channel 6 is inclined along the length direction of the fixed mold base 22, and the cross section of the bottom inner wall of the connecting channel 6 along the length direction is arc-shaped. Specifically, the connecting channel 6 includes a material receiving end 61 connected to the injection channel 211 and inclined portions arranged on both sides of the material receiving end 61, the material receiving end 61 is circularly arranged along its axial direction, the diameter of the material receiving end 61 is greater than the width of the inclined portion, and the bottom wall of the material receiving end 61 is located above the bottom wall of the inclined portion. In this embodiment, the two inclined portions are respectively a first inclined portion 62 and a second inclined portion 63, and the inclined angle formed between the length direction of the second inclined portion 63 and the length direction of the fixed mold assembly 2 is smaller than the inclined angle of the first inclined portion 62. The first discharge channel 51 extends to the inner cavity of the first inclined portion 62 , and the second discharge channel 52 extends to the inner cavity of the second inclined portion 63 . At this time, the distance between the first discharge channel 51 and the injection channel 211 is smaller than the distance between the second discharge channel 52 and the injection channel 211 .

[0040] The implementation principle of an injection mold for parts molding in the embodiment of the present application is as follows: the first discharge channel 51 is arranged close to the first installation and molding area 41, and the caliber of the first discharge channel 51 at the discharge end is larger than the caliber of the second discharge end, so that the molten plastic discharged from the second discharge channel 52 can flow into the first installation and molding area 41 before flowing into the second installation and molding area 44, and after a certain period of time, it flows into the second installation and molding area 44. When the amount of molten plastic in the second molding area is reached, the amount of molten plastic in the first installation and molding area 41 is also relatively reached. Providing two discharge channels 5 is relatively easy to process, and it is relatively easy to control the amount of molten plastic required for each part, reducing the possibility of extrusion or shortage of materials, so as to improve the quality of the injection molded part 1.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold for facilitating part molding, characterized in that: The invention comprises a fixed die set (2) and a movable die set (3) matched with the fixed die set (2), wherein a molding cavity for molding molten plastic is formed between the fixed die set (2) and the movable die set (3), an injection channel (211) is provided on a surface of the fixed die set (2) away from the movable die set (3), and two discharge channels (5) are provided on a surface of the fixed die set (2) close to the movable die set (3), wherein the two discharge channels (5) are respectively a first discharge channel (51) and a second discharge channel (52), wherein the first discharge channel (51) and the second discharge channel (52) are respectively provided. The two discharge channels (52) are connected to the injection channel (211) and are respectively arranged on both sides of the injection channel (211); the first discharge channel (51) is arranged in the strip groove of the first groove molding area (42) and is arranged close to the first installation molding area (41); the second discharge channel (52) is arranged in the strip groove between the first groove molding area (42) and the second groove molding area (43); the diameter of the first discharge channel (51) at the discharge end is larger than the diameter of the second discharge channel (52) at the discharge end.

2. An injection mold for facilitating part molding according to claim 1, characterized in that: The distance between the first discharge channel (51) and the injection channel (211) is smaller than the distance between the second discharge channel (52) and the injection channel (211).

3. An injection mold for facilitating part molding according to claim 1, characterized in that: The diameter of the discharge channel (5) at the discharge end is smaller than the diameter at the feed end.

4. An injection mold for facilitating part molding according to claim 3, characterized in that: The diameter of the discharge channel (5) gradually decreases along its radial direction towards the discharge end.

5. The injection mold for facilitating part molding according to claim 1, characterized in that: A connecting channel (6) parallel to the upper surface of the fixed die set (2) is provided in the fixed die set (2); the connecting channel (6) is connected to the first discharge channel (51), the second discharge channel (52) and the injection channel (211); and the connecting channel (6) is arranged at an angle along the length direction of the fixed die set (2).

6. An injection mold for facilitating part molding according to claim 5, characterized in that: The cross section of the bottom inner wall of the connecting channel (6) along the length direction is arranged in an arc shape.

7. The injection mold for facilitating part molding according to claim 5, characterized in that: The connecting channel (6) comprises a material receiving end (61) flowing through the injection channel (211) and inclined portions arranged on both sides of the material receiving end (61), and the bottom wall of the material receiving end (61) is located above the bottom wall of the inclined portion.

8. An injection mold for facilitating part molding according to claim 7, characterized in that: The discharge ends of the first discharge channel (51) and the second discharge channel (52) are both arranged in the middle of the molding cavity, and the two inclined portions are respectively a first inclined portion (62) connected to the first discharge channel (51) and a second inclined portion (63) connected to the second discharge channel (52), and an inclined angle formed between a length direction of the second inclined portion (63) and a length direction of the fixed mold assembly (2) is smaller than an inclined angle of the first inclined portion (62).

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