Auxiliary blowing mechanism for injection filling of thin-wall product in injection mold

Abstract

According to the technical scheme, the injection molding filling auxiliary blowing mechanism for the thin-wall product in the injection mold comprises a core plate, the injection molding product and a cavity plate, a plurality of mounting grooves arranged at intervals are formed in the core plate, and air inlet channels are formed in the positions, at the mounting grooves, of the core plate; each air inlet channel penetrates through the core plate and then is connected to an air source of an injection molding machine through an independent air pipe, an air blowing insert is connected into the installation groove, a plurality of independent air grooves are formed in the side face of the air blowing insert, air outlet gaps are reserved between the air grooves and the core plate, and the shape of the top face of the air blowing insert 3 corresponds to the shape of an injection molding product at the position. The multiple blowing inserts are arranged on the core plate at intervals, the blowing inserts are sequentially controlled to blow in the product injection molding and filling process, finally, flowing of molten plastic is accelerated, a product cavity is rapidly and fully filled with material flow, and the product quality is guaranteed.

Description

Technical Field

[0001] The invention relates to an injection mold for thin-walled products, in particular to an injection filling auxiliary blowing mechanism for thin-walled products in the injection mold. Background Art

[0002] With the rapid renewal of the automobile industry, in order to seize market share faster, shorten the production cycle and reduce production costs. The purpose of the present invention is to meet the demand for lightweight automobiles while maintaining the beautiful character of the vehicle. When the wall thickness of the product is reduced, the plastic flows slowly during injection molding, affecting the production cycle and increasing appearance defects, such as gaps at the end of the product and uneven surface. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide an auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold, wherein a plurality of blowing inserts are arranged at intervals on a core plate, and the blowing inserts are controlled in sequence to blow during the injection molding and filling process of the product, thereby ultimately accelerating the flow of molten plastic and promoting the material flow to fully fill the product cavity.

[0004] The technical solution of the present invention is an auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold, comprising a core plate, an injection molded product and a cavity plate, wherein the core plate is provided with a plurality of installation grooves arranged at intervals, an air inlet channel is arranged in the core plate at the installation groove, each air inlet channel penetrates the core plate and is connected to the air source of the injection molding machine through an independent air pipe, a blowing insert is connected in the installation groove, a plurality of independent air grooves are provided on the side of the blowing insert, an air outlet gap is left between the air groove and the core plate, and the top surface shape of the blowing insert 3 corresponds to the shape of the injection molded product at that location.

[0005] Preferably, it also includes a control module, which controls the air source of the injection molding machine separately and sets the blowing start time for each blowing insert during the injection molding process, wherein the blowing start time of the blowing insert close to the gate position is earlier than that of the blowing insert far from the gate position, and the blowing start time and continuous blowing time of all the blowing inserts are integrated and controlled by the control module.

[0006] Preferably, the blowing insert is provided with a stepped hole, and the core plate is provided with a threaded hole, and the screw passes through the stepped hole and is threadedly connected to the core plate to fix the blowing insert.

[0007] Preferably, the number of stepped holes on the blowing insert is two, which are located at the left and right positions of the blowing insert, and the number of threaded holes and screws on the core plate are two, which are arranged corresponding to each other.

[0008] Preferably, the air grooves on the blowing insert include a cross groove located on the bottom surface, an inclined surface located at the transition between the bottom surface and the side surface, an air guide groove located at the lower part of the side surface of the blowing insert and arranged along the height direction, and an annular air groove located at the upper part of the side surface of the blowing insert and surrounding the side surface; the bottom of the air guide groove is connected with the cross groove through the inclined surface, and the top surface of the air guide groove is connected with the annular air groove; the air source of the injection molding machine enters the annular air groove after passing through the cross groove and the air guide groove, flows evenly, diffuses and slows down, and then flows out from the gap between the blowing insert and the core plate to blow air to the material flow to promote its accelerated flow.

[0009] The present invention arranges a plurality of blowing inserts at intervals on the core plate, and controls the blowing inserts to blow in sequence during the process of product injection molding and filling, thereby finally accelerating the flow of molten plastic, promoting the material flow to quickly fill the product cavity, and ensuring product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 An exploded view of the present invention; Figure 3 It is a structural schematic diagram of a medium-sized core plate of the present invention; Figure 4 It is a structural schematic diagram of the injection molded product in the present invention; Figure 5 A schematic diagram of the structure of the air blowing insert in the present invention; Figure 6 for Figure 5 A schematic diagram of the structure from another perspective; Figure 7 Another structural schematic diagram of the air blowing insert in the present invention; Among them: 1—core plate; 11—installation groove; 12—air inlet channel; 2—cavity plate; 3—blowing insert; 31—air groove; 311—cross groove; 312—inclined surface; 313—air guide groove; 314—annular air groove; 4—injection molded product. DETAILED DESCRIPTION

[0011] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0012] like Figures 1 to 7As shown, the present invention provides an auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold, comprising a core plate 1, an injection molded product 4 and a cavity plate 2, wherein the core plate 1 is provided with a plurality of installation grooves 11 arranged at intervals, an air inlet channel 12 is provided in the core plate 1 at the installation groove 11, each air inlet channel 12 penetrates the core plate 1 and is connected to an air source of an injection molding machine through an independent air pipe, a blowing block 3 is connected in the installation groove 11, a plurality of independent air grooves 31 are provided on the side of the blowing block 3, an air outlet gap is left between the air groove 31 and the core plate 1, and the top surface shape of the blowing block 3 corresponds to the shape of the injection molded product at that location.

[0013] In the above scheme, a control module is also included, which controls the air source of the injection molding machine separately and sets the starting time of blowing for each blowing block 3 during the injection molding process, wherein the starting time of blowing for the blowing block 3 close to the gate position is earlier than that of the blowing block 3 far from the gate position, and the starting time and continuous blowing time of all the blowing blocks 3 are integrated and controlled by the control module.

[0014] In addition, the blowing insert 3 is provided with a stepped hole, and the core plate 1 is provided with a threaded hole. The screw passes through the stepped hole and is threadedly connected to the core plate 1 to fix the blowing insert 3.

[0015] In addition, there are two stepped holes on the blowing insert 3, which are located at the left and right positions of the blowing insert 3, and there are two threaded holes and two screws on the core plate 1, which are arranged corresponding to each other.

[0016] Specifically, the air groove 31 on the blowing insert 3 includes a cross groove 311 located on the bottom surface, an inclined surface 312 located at the transition between the bottom surface and the side surface, an air guide groove 313 located at the lower part of the side surface of the blowing insert 3 and arranged along the height direction, and an annular air groove 314 located at the upper part of the side surface of the blowing insert 3 and surrounding its side surface; the bottom of the air guide groove 313 is connected with the cross groove 311 through the inclined surface 312, and the top surface of the air guide groove 313 is connected with the annular air groove 314; the air source of the injection molding machine enters the annular air groove 314 after passing through the cross groove 311 and the air guide groove 313, flows evenly, diffuses and slows down, and then flows out from the gap between the blowing insert 3 and the core plate 1 to blow air to the material flow to promote its accelerated flow.

[0017] In the present invention, the core plate 1 and the cavity plate 2 are molded together for injection molding. The injection molding machine squeezes the molten plastic into the mold to achieve normal injection molding. The control module controls different blowing inserts 3 in turn to blow air, pushing the molten plastic forward to accelerate the filling. For example: the first insert is opened 0.8S after injection, the second is opened 1.7S after injection, the third is opened 2.0S after injection, and the fourth is opened 2.8S after injection. The specific time can be set according to actual conditions. Each group of air inlet channels is independently designed and not connected in series with each other, so that the molten plastic can smoothly and quickly fill the entire product cavity.

[0018] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. An auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold, comprising a core plate (1), an injection molded product (4) and a cavity plate (2), characterized in that: The core plate (1) is provided with a plurality of installation grooves (11) arranged at intervals. An air inlet channel (12) is provided in the core plate (1) at the installation groove (11). Each air inlet channel (12) penetrates the core plate (1) and is connected to an air source of an injection molding machine through an independent air pipe. A blow insert (3) is connected in the installation groove (11). The side of the blow insert (3) is provided with a plurality of independent air grooves (31). An air outlet gap is left between the air groove (31) and the core plate (1). The top surface shape of the blow insert (3) corresponds to the shape of the injection molded product at that location.

2. The auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold according to claim 1, characterized in that: The invention also comprises a control module, wherein the control module controls the air source of the injection molding machine respectively and sets the blowing start time for each blowing insert (3) during the injection molding process, wherein the blowing start time of the blowing insert (3) close to the gate position is earlier than that of the blowing insert (3) far from the gate position, and the blowing start time and continuous blowing time of all the blowing inserts (3) are integrated and controlled by the control module.

3. The auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold according to claim 1, characterized in that: The blowing insert (3) is provided with a stepped hole, and the core plate (1) is provided with a threaded hole. The screw passes through the stepped hole and is threadedly connected to the core plate (1) to fix the blowing insert (3).

4. The auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold according to claim 3, characterized in that: The number of stepped holes on the blowing insert (3) is two, which are located at the left and right positions of the blowing insert (3); the number of threaded holes and screws on the core plate (1) are two, which are arranged corresponding to each other.

5. The auxiliary blowing mechanism for injection molding and filling of thin-walled products in an injection mold according to claim 1, characterized in that: The air groove (31) on the blowing insert (3) comprises a cross groove (311) located on the bottom surface, an inclined surface (312) located at a transition between the bottom surface and the side surface, an air guide groove (313) located at the lower part of the side surface of the blowing insert (3) and arranged in the height direction, and an annular air groove (314) located at the upper part of the side surface of the blowing insert (3) and surrounding the side surface; the bottom of the air guide groove (313) is connected to the cross groove (311) through the inclined surface (312), and the top surface of the air guide groove (313) is connected to the annular air groove (314); the air source of the injection molding machine enters the annular air groove (314) after passing through the cross groove (311) and the air guide groove (313), flows evenly, diffuses and slows down, and then flows out from the gap between the blowing insert (3) and the core plate (1) to blow air to the material flow to promote its accelerated flow.

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