A double-layer hot runner main nozzle separation mold and separation process

Abstract

The present invention relates to the field of mold processing technology, and in particular to a double-stack hot runner main nozzle separation mold and a separation process. Its structure includes a main nozzle heating fixed mold and a main nozzle heating movable mold that are relatively arranged. The main nozzle heating fixed mold and the main nozzle heating movable mold are respectively provided with a fixed mold needle valve and a movable mold needle valve. The central axial section of the fixed mold needle valve is T-shaped. The fixed mold head of the fixed mold needle valve is engaged with the front end inner wall of the fixed mold hole of the main nozzle heating fixed mold. The diameter of the fixed mold rod of the fixed mold needle valve is smaller than the inner diameter of the rear part of the fixed mold hole of the main nozzle heating fixed mold. A double-stack hot runner main nozzle separation mold and a separation process of the present invention solves the overflow problem generated when the nozzle of the injection molding machine is separated through the split design of the fixed and movable molds, thereby avoiding affecting the quality of the next mold product.

Description

Technical Field

[0001] The invention relates to the technical field of mold processing, and in particular to a double-stacked hot runner main nozzle separation mold and a separation process. Background Art

[0002] The hot runner main nozzle separation mold and its separation process under the prior art are as shown in the attached Figure 1-2 As shown, it includes the main nozzle heating movable mold A and the movable mold needle valve B. The main nozzle heating movable mold is too long as a whole, which is inconvenient for both processing and mold installation, and the maintenance cost is also very high. The most important thing is that when the main nozzle heating movable mold is in use, the injection molding machine must separate and mate it once for each injection of a product. If the number of collisions back and forth is too many, the nozzle will be damaged. In addition, each time the main nozzle is closed, the movable mold valve needle will squeeze out a section of waste C. If there is too much waste, it will wrap the main nozzle, affecting the quality stability of the product and increasing the scrap rate. Summary of the invention

[0003] In order to solve the problems of the prior art, the present invention provides a double-stack hot runner main nozzle separation mold and separation process, which solves the overflow problem caused by separation from the injection molding machine nozzle through the split design of the fixed and movable molds, thereby avoiding affecting the quality of the next mold product.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A double-stack hot runner main nozzle separation mold comprises a main nozzle heating fixed mold and a main nozzle heating movable mold which are arranged oppositely, wherein a fixed mold needle valve and a movable mold needle valve are respectively arranged in the main nozzle heating fixed mold and the main nozzle heating movable mold, wherein the central axial section of the fixed mold needle valve is T-shaped, the fixed mold head of the fixed mold needle valve is engaged with the front end inner wall of the fixed mold hole of the main nozzle heating fixed mold, and the fixed mold rod diameter of the fixed mold needle valve is smaller than the inner diameter of the rear part of the fixed mold hole of the main nozzle heating fixed mold.

[0006] The movable mold needle valve includes a recessed movable mold head and a movable mold rod at the front end of the movable mold head. The movable mold head is engaged and embedded with the inner wall of the rear end of the movable mold hole of the main nozzle heating movable mold. The diameter of the movable mold rod is larger than the diameter of the movable mold head and smaller than the inner diameter of the front part of the movable mold hole.

[0007] The lower edge of the fixed die head of the fixed die needle valve is a spherical surface.

[0008] A double-layer hot runner main nozzle separation process includes the following steps:

[0009] A. After the main nozzle heating fixed mold and the main nozzle heating movable mold are respectively provided with a fixed mold needle valve and a movable mold needle valve, the fixed mold needle valve and the movable mold needle valve are moved a certain distance toward the main nozzle heating movable mold, so that a space is generated between the fixed mold needle valve and the movable mold needle valve and the fixed mold hole of the main nozzle heating fixed mold and the movable mold hole of the main nozzle heating movable mold;

[0010] B. Injection molding into the space;

[0011] C. After the injection molding is completed, the fixed mold needle valve and the movable mold needle valve move toward the main nozzle heating fixed mold until the fixed mold head of the fixed mold needle valve with a T-shaped central axial section is engaged and embedded in the front inner wall of the fixed mold hole of the main nozzle heating fixed mold, and the movable mold head is engaged and embedded in the rear inner wall of the movable mold hole of the main nozzle heating movable mold to complete the sealing;

[0012] D. After sealing, open the mold to eject the product and complete the separation of the main nozzle.

[0013] The beneficial effects brought by the technical solution provided by the present invention are:

[0014] Compared with the prior art, the double-stack hot runner main nozzle separation mold and separation process of the present invention have a simpler structure, a more flexible overall structure, and are convenient to install, so that the mold volume can be smaller. Most importantly, the problem of overflow caused by separation from the injection molding machine nozzle affecting the quality of the next mold product is eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the hot runner main nozzle separation mold structure under the prior art;

[0017] Figure 2 It is a schematic diagram of a hot runner main nozzle separation mold injection molding process under the prior art;

[0018] Figure 3 It is a structural schematic diagram of a double-layer hot runner main nozzle separation mold of the present invention;

[0019] Figure 4 The figure is a process schematic diagram of a method for separating main nozzles of a double-stack hot runner according to the present invention. DETAILED DESCRIPTION

[0020] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] Embodiment 1

[0022] As attached Figure 3 As shown, a double-stacked hot runner main nozzle separation mold of the present embodiment includes a main nozzle heating fixed mold 1 and a main nozzle heating movable mold 2 which are arranged relatively, and a fixed mold needle valve 3 and a movable mold needle valve 4 are respectively arranged in the main nozzle heating fixed mold 1 and the main nozzle heating movable mold 2, and the central axial section of the fixed mold needle valve 3 is T-shaped, and the fixed mold head 31 of the fixed mold needle valve 3 is engaged with the front end inner wall of the fixed mold hole 11 of the main nozzle heating fixed mold 1, and the diameter of the fixed mold rod 32 of the fixed mold needle valve 3 is smaller than the inner diameter of the rear part of the fixed mold hole 11 of the main nozzle heating fixed mold 1.

[0023] As attached Figure 3 As shown, the movable mold needle valve 4 includes a recessed movable mold head 41 and a movable mold rod 42 at the front end of the movable mold head, the movable mold head 41 is engaged with the inner wall of the rear end of the movable mold hole 21 of the main nozzle heating movable mold 2, and the diameter of the movable mold rod 42 is larger than the diameter of the movable mold head 41 and smaller than the inner diameter of the front part of the movable mold hole 21.

[0024] The lower edge of the fixed die head 31 of the fixed die needle valve 3 in this embodiment is a spherical surface.

[0025] Embodiment 2

[0026] As attached Figure 4 As shown, this embodiment provides a double-stack hot runner main nozzle separation process, including the following steps:

[0027] A. After the main nozzle heating fixed mold 1 and the main nozzle heating movable mold 2, which are respectively provided with a fixed mold needle valve 3 and a movable mold needle valve 4, are attached, the fixed mold needle valve 3 and the movable mold needle valve 4 are moved a certain distance toward the main nozzle heating movable mold 2, so that a space is generated between the fixed mold needle valve 3 and the movable mold needle valve 4 and the fixed mold hole 11 of the main nozzle heating fixed mold 1 and the movable mold hole 21 of the main nozzle heating movable mold 2;

[0028] B. Injection molding into the space;

[0029] C. After the injection molding is completed, the fixed mold needle valve 3 and the movable mold needle valve 4 move toward the main nozzle heating fixed mold 1 until the fixed mold head 31 of the fixed mold needle valve 3 with a T-shaped central axial section is engaged and embedded in the front inner wall of the fixed mold hole 11 of the main nozzle heating fixed mold 1, and the movable mold head 41 is engaged and embedded in the rear inner wall of the movable mold hole 21 of the main nozzle heating movable mold 2 to complete the sealing;

[0030] D. After sealing, open the mold to eject the product and complete the separation of the main nozzle.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-layer hot runner main nozzle separation mold, comprising a main nozzle heating fixed mold and a main nozzle heating movable mold arranged oppositely, wherein the main nozzle heating fixed mold and the main nozzle heating movable mold are respectively provided with a fixed mold needle valve and a movable mold needle valve, characterized in that: The central axial section of the fixed mold needle valve is T-shaped, the fixed mold head of the fixed mold needle valve is engaged with the inner wall of the front end of the fixed mold hole of the main nozzle heating fixed mold, and the diameter of the fixed mold rod of the fixed mold needle valve is smaller than the inner diameter of the rear part of the fixed mold hole of the main nozzle heating fixed mold; the movable mold needle valve includes a recessed movable mold head and a movable mold rod at the front end of the movable mold head, the movable mold head is engaged with the inner wall of the rear end of the movable mold hole of the main nozzle heating movable mold, and the diameter of the movable mold rod is larger than the diameter of the movable mold head and smaller than the inner diameter of the front part of the movable mold hole; The lower edge of the fixed die head of the fixed die needle valve is a spherical surface; After the injection molding is completed, the fixed mold needle valve and the movable mold needle valve move toward the direction of the main nozzle heating fixed mold until the fixed mold head of the fixed mold needle valve with a T-shaped central axial section is engaged and embedded in the front end inner wall of the fixed mold hole of the main nozzle heating fixed mold. At this time, the movable mold head is engaged and embedded in the rear end inner wall of the movable mold hole of the main nozzle heating movable mold to complete the material sealing.

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