Injection mold for automobile eight-way valve body

Abstract

The present invention discloses an injection mold for an automobile eight-way valve body, comprising a mold core (5) for molding a central through hole of the automobile eight-way valve body and a core pulling rod (6) for molding a plurality of oblique pulling holes of the automobile eight-way valve body; the ejection mechanism comprises an oblique ejection device and a secondary core pulling device, the secondary core pulling device being arranged horizontally between a movable mold component (2) and a fixed mold component (1); the mold core (5) is located in a mold cavity, one end of the core pulling rod (6) is connected to the secondary core pulling device, and the other end of the core pulling rod (6) is fitted with the outer peripheral surface of the mold core (5) when the mold is closed. In this way, the mold is formed in one piece by injection molding, thereby ensuring the position and dimensional accuracy of the oil pipeline inside the valve body.

Description

Technical Field

[0001] The invention relates to the technical field of moulds, in particular to an injection mould for an eight-way valve body of an automobile. Background Art

[0002] At present, more and more auto parts are made of plastic products made by injection molding, especially some parts with complex shapes and many dense curved surfaces. However, there are some parts with regular appearance but very complex internal structure, such as the automobile eight-way valve body, which looks like a square part in appearance, but its interior is composed of many complex oil pipelines, with a central through hole and eight oblique extraction holes. The existing eight-way valve body is usually manufactured by drilling, and this manufacturing method has the following disadvantages:

[0003] 1) Since the oil pipeline is inside the valve body, the depth of the pipeline is difficult to guarantee. Therefore, once the depth of the oil pipeline inside the valve body exceeds the size, it is possible that the pipeline inside the valve body will penetrate under the action of oil pressure, resulting in machine failure. At this time, the valve body will be scrapped if the size is not qualified. The processing error increases the production cost;

[0004] 2) Furthermore, according to actual needs, there will be inclined holes in the oil pipeline in the valve body. According to the existing processing technology, under the premise of limited valve body volume, the accuracy of these inclined holes is often not guaranteed, especially the inclination does not meet the requirements, which further increases the scrap rate and production costs. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide an injection mold for an automobile eight-way valve body which is integrally formed by injection molding, thereby ensuring the position and dimensional accuracy of the oil pipeline inside the valve body.

[0006] In order to solve the above technical problems, the injection mold of the automobile eight-way valve body provided by the present invention comprises a fixed mold assembly, a movable mold assembly and an ejection mechanism. The fixed mold assembly and the movable mold assembly are molded together to form a molding cavity, and the ejection mechanism is located below the movable mold assembly; the injection mold also comprises a mold core for molding a central through hole of the automobile eight-way valve body and a core pulling rod for molding multiple inclined holes of the automobile eight-way valve body; the ejection mechanism comprises an inclined ejection device and a secondary core pulling device, the inclined ejection device is arranged in a vertical direction, the upper end of the inclined ejection device is connected to the mold core, the lower end of the inclined ejection device is connected to the ejection plate in the ejection mechanism, and the secondary core pulling device is arranged in a horizontal direction between the movable mold assembly and the fixed mold assembly; the mold core is located in the mold cavity, one end of the core pulling rod is connected to the secondary core pulling device, and the other end of the core pulling rod is in contact with the outer peripheral surface of the mold core when the mold is closed.

[0007] The secondary core pulling device includes a cylinder, a primary slider, a secondary slider and a pull rod; the cylinder is connected to the movable mold assembly through a cylinder bracket, the power output shaft of the cylinder is connected to one end of the primary slider, and the other end of the primary slider is fixedly connected to the core pulling rod; the core pulling rod is slidably connected to the secondary slider, and the secondary slider is located between the primary slider and the mold core; the primary slider and the secondary slider are both slidably connected to the cylinder bracket.

[0008] The core pulling rods are arranged in two rows symmetrically arranged vertically, and each two core pulling rods symmetrically arranged vertically are connected by a positioning rod, which is located in the primary slider, and the upper and lower ends of the positioning rod are fixedly connected to the upper and lower ends of the primary slider respectively.

[0009] The end of the primary slider facing the secondary slider is provided with a plurality of inwardly concave core-pulling rod accommodating grooves, and the core-pulling rod accommodating grooves are symmetrically arranged in two layers, and the primary slider is divided into three layers of upper, middle and lower plates in the vertical direction; the three layers are provided with coaxial through holes in the vertical direction, and each positioning rod is simultaneously penetrated through the through holes of the upper, middle and lower layers, and is fixed in the primary slider through a cover plate.

[0010] The upper, middle and lower layers of the primary slider are provided with pull rod holes which penetrate horizontally, and one end of the pull rod hole away from the secondary slider is provided with a positioning countersunk hole for limiting the pull rod head at the end of the primary ejection.

[0011] The inclined ejector device includes a core insert, an inclined ejector rod and a connecting seat assembly. The core insert is fixedly connected to the mold core, and the outer surface of the core insert cooperates with the mold core to form an integral cavity surface of the central through hole of the automobile eight-way valve body; the upper end of the inclined ejector rod is connected to the core insert, and the lower end is hinged to the connecting seat assembly, and the connecting seat assembly is fixedly connected to the top plate of the ejection mechanism.

[0012] A boss is provided at the position where the surface of the core insert fits the end of the core pulling rod. The end face of the boss is a plane, and the corresponding end face of the core pulling rod is a plane matching the end face of the boss. The extension direction of the plane is parallel to the length direction of the core pulling rod.

[0013] After adopting the above structure, the present invention has the following advantages compared with the prior art:

[0014] 1) Since the automobile eight-way valve body is integrally formed by this injection mold, the position and size accuracy of the oil pipeline inside the valve body are guaranteed, especially the accuracy of the inclined hole, so the size of the product is more accurate;

[0015] 2) In addition, the demoulding of the center through hole and the oblique pulling hole is carried out in stages through the secondary core pulling device. First, the primary slider pulls the core pulling rod outward synchronously under the action of the cylinder to separate the core pulling rod from the mold core. Then the primary slider and the secondary slider move simultaneously, and the top plate pushes the product out of the mold core through the oblique ejection device, thereby avoiding the interference between the mold core and the core pulling rod during demoulding and ensuring the quality of the product.

[0016] 3) The core pulling rods are symmetrically arranged in two layers, and each of the two symmetrical core pulling rods is connected by a positioning rod. In this way, the upper and lower core pulling rods can move synchronously, increasing the accuracy of their movement; and the structure of the upper, middle and lower layers of the slider is penetrated by the positioning rod, making the structure more compact and the effect of synchronous movement more significant;

[0017] 4) The setting of the boss on the core insert converts the original arc surface demolding into flat surface demolding, making demolding more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the injection mold of the automobile eight-way valve body of the present invention.

[0019] Figure 2 The invention is a schematic diagram of the structure of the injection mold of the automobile eight-way valve body without the fixed mold component.

[0020] Figure 3 The invention discloses an exploded structural schematic diagram of an injection mold for an automobile eight-way valve body.

[0021] Figure 4 It is a schematic diagram of the explosion structure of the secondary core pulling device in the present invention.

[0022] Figure 5 It is a structural schematic diagram of a primary slider in the present invention.

[0023] Figure 6 It is a schematic structural diagram of the inclined top device in the present invention.

[0024] Figure 7 It is a structural schematic diagram of the core insert block in the present invention.

[0025] Among them: 1. Fixed mold assembly; 2. Moving mold assembly; 3. Ejector mechanism; 4. Ejector plate; 5. Mold core; 6. Core pulling rod; 7. Cylinder; 8. Cylinder bracket; 9. Primary slider; 10. Secondary slider; 11. Cover plate; 12. Mold core insert; 13. Pull rod; 14. Boss; 15. Slanted ejector rod; 16. Connecting seat assembly; 17. Positioning rod; 18. Core pulling rod accommodating groove; 19. Pull rod hole. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Combination Figure 1 to Figure 7 It can be seen from the structural schematic diagram of the injection mold of the automobile eight-way valve body of the present invention that it includes a fixed mold assembly 1, a movable mold assembly 2 and an ejection mechanism. The fixed mold assembly 1 and the movable mold assembly 2 form a molding cavity after the mold is closed, and the ejection mechanism is located below the movable mold assembly 2. The injection mold also includes a mold core 5 for molding the central through hole of the automobile eight-way valve body and a core pulling rod 6 for molding multiple inclined holes of the automobile eight-way valve body; the ejection mechanism includes an inclined ejection device and a secondary core pulling device, the inclined ejection device is arranged in a vertical direction, the upper end of the inclined ejection device is connected to the mold core 5, and the lower end of the inclined ejection device is connected to the top plate 4 in the ejection mechanism 3, and the secondary core pulling device is arranged in a horizontal direction between the movable mold assembly 2 and the fixed mold assembly 1; the mold core 5 is located in the mold cavity, one end of the core pulling rod 6 is connected to the secondary core pulling device, and the other end of the core pulling rod 6 fits the outer peripheral surface of the mold core 5 when the mold is closed.

[0028] The secondary core pulling device includes a cylinder 7, a primary slider 9, a secondary slider 10 and a pull rod 13; the cylinder 7 is connected to the movable mold assembly 2 through a cylinder bracket 8, the power output shaft of the cylinder 7 is connected to one end of the primary slider 9, and the other end of the primary slider 9 is fixedly connected to the core pulling rod 6; the core pulling rod is slidably connected to the secondary slider 10, and the secondary slider 10 is located between the primary slider 9 and the mold core 5; the primary slider 9 and the secondary slider 10 are both slidably connected to the cylinder bracket 8.

[0029] The core pulling rods 6 are arranged in two rows symmetrically arranged in the upper and lower parts, and each of the two core pulling rods 6 arranged symmetrically in the upper and lower parts is connected by a positioning rod 17, which is located in the primary slider 9, and the upper and lower ends of the positioning rod 17 are respectively fixedly connected to the upper and lower ends of the primary slider 9. In this injection mold, since it is an eight-way valve body, the number of core pulling rods 6 is eight, which are symmetrically arranged in two layers, four on the upper and four on the lower. Figure 4 As shown in the figure, the inclination angle of the core pulling rod at the lower side is the largest, so the cover plate of the positioning rod configured with it on the primary slider is configured separately; while the cover plate of the three positioning rods configured with the other three pairs of core pulling rods on the primary slider is the same cover plate according to their inclination angles.

[0030] The end of the primary slider 9 facing the secondary slider 10 is provided with a plurality of inwardly concave core-pulling rod accommodating grooves 18, and the core-pulling rod accommodating grooves 18 are symmetrically arranged in two layers, and the primary slider 9 is divided into three layers of upper, middle and lower plates in the vertical direction; the three layers are provided with coaxial through holes in the vertical direction, and each positioning rod 17 is simultaneously penetrated through the through holes of the upper, middle and lower three layers, and is fixed in the primary slider 9 through the cover plate 11.

[0031] The upper, middle and lower layers of the primary slider 9 are provided with tie rod holes 19 that penetrate in the horizontal direction, and one end of the tie rod hole 19 away from the secondary slider 10 is provided with a positioning countersunk hole for limiting the tie rod head of the tie rod 13 at the end of the primary ejection. The step surfaces of the positioning countersunk holes of all tie rods on the primary slider are in the same plane in the vertical direction, so that all tie rod heads are synchronously limited.

[0032] The inclined ejector device includes a core insert 12, an inclined ejector rod 15 and a connecting seat assembly 16. The core insert 12 is fixedly connected to the core 5, and the outer surface of the core insert 12 cooperates with the core 5 to form an integral cavity surface of the central through hole of the automobile eight-way valve body; the upper end of the inclined ejector rod 15 is connected to the core insert 12, and the lower end is hinged to the connecting seat assembly 16, and the connecting seat assembly 16 is fixedly connected to the top plate 4 of the ejection mechanism 3.

[0033] A boss 14 is provided at the position where the surface of the core insert 12 fits with the end of the core pulling rod 6. The end face of the boss 14 is a plane, and the corresponding end face of the core pulling rod 6 is a plane matching the end face of the boss 14. The extension direction of the plane is parallel to the length direction of the core pulling rod 6.

[0034] The demoulding working principle of the present invention is as follows:

[0035] When the mold is opened, the movable mold assembly moves downward to separate the movable mold assembly from the fixed mold assembly. Then the cylinder is started, and the primary slider pulls the core puller rod outward synchronously under the action of the cylinder, so that the core puller rod is separated from the mold core. When the pull rod head contacts the positioning countersunk hole on the primary slider, the primary slider and the secondary slider move simultaneously under the action of the pull rod until the core puller rod is completely separated from the mold cavity. Finally, the top plate pushes the product out of the mold core through the inclined ejector device to complete the demoulding.

[0036] The above is only a preferred feasible implementation example of the present invention, which cannot limit the scope of rights of the present invention. For those skilled in the art, all other corresponding changes made using the technical solutions and technical concepts of the present invention should fall within the scope of protection of the claims of the present invention.

Claims

1. An injection mold for an eight-way valve body of an automobile, comprising a fixed mold assembly (1), a movable mold assembly (2) and an ejection mechanism, wherein the fixed mold assembly (1) and the movable mold assembly (2) are molded together to form a molding cavity, and the ejection mechanism is located below the movable mold assembly (2); characterized in that: The injection mold further comprises a mold core (5) for molding a central through hole of an automobile eight-way valve body and a core pulling rod (6) for molding a plurality of oblique pulling holes of the automobile eight-way valve body; the ejection mechanism comprises an inclined ejection device and a secondary core pulling device, the inclined ejection device being arranged in a vertical direction, the upper end of the inclined ejection device being connected to the mold core (5), the lower end of the inclined ejection device being connected to the ejection mechanism (3) in a top plate (4), and the secondary core pulling device being arranged in a horizontal direction between the movable mold assembly (2) and the fixed mold assembly (1); the mold core (5) is located in the mold cavity, one end of the core pulling rod (6) is connected to the secondary core pulling device, and the other end of the core pulling rod (6) is in contact with the outer peripheral surface of the mold core (5) when the mold is closed; The secondary core pulling device comprises a cylinder (7), a primary slider (9), a secondary slider (10) and a pull rod (13); the cylinder (7) is connected to the movable mold assembly (2) via a cylinder bracket (8); the power output shaft of the cylinder (7) is connected to one end of the primary slider (9), and the other end of the primary slider (9) is fixedly connected to the core pulling rod (6); the core pulling rod is slidably connected to the secondary slider (10), and the secondary slider (10) is located between the primary slider (9) and the mold core (5); the primary slider (9) and the secondary slider (10) are both slidably connected to the cylinder bracket (8); The inclined ejector device comprises a core insert (12), an inclined ejector rod (15) and a connecting seat assembly (16); the core insert (12) is fixedly connected to the core (5), and the outer surface of the core insert (12) cooperates with the core (5) to form an integral cavity surface of the central through hole of the automobile eight-way valve body; the upper end of the inclined ejector rod (15) is connected to the core insert (12), and the lower end is hinged to the connecting seat assembly (16); the connecting seat assembly (16) is fixedly connected to the top plate (4) of the ejection mechanism (3) A boss (14) is provided at a position where the surface of the core insert (12) fits with the end of the core pulling rod (6); the end face of the boss (14) is a plane, and the corresponding end face of the core pulling rod (6) is a plane matching the end face of the boss (14); the extension direction of the plane is parallel to the length direction of the core pulling rod (6).

2. The injection mold of the automobile eight-way valve body according to claim 1, characterized in that: The core pulling rods (6) are arranged in two rows symmetrically arranged in the upper and lower parts, and each of the two core pulling rods (6) symmetrically arranged in the upper and lower parts is connected by a positioning rod (17). The positioning rod (17) is located in the primary slider (9), and the upper and lower ends of the positioning rod (17) are respectively fixedly connected to the upper and lower ends of the primary slider (9).

3. The injection mold of the automobile eight-way valve body according to claim 2, characterized in that: The end of the primary slider (9) facing the secondary slider (10) is provided with a plurality of inwardly concave core-pulling rod accommodating grooves (18), the core-pulling rod accommodating grooves (18) are divided into two layers, upper and lower, and are symmetrically arranged, and the primary slider (9) is divided into three layers, namely, upper, middle and lower layers, in the vertical direction; the three layers are provided with coaxial through holes in the vertical direction, and each positioning rod (17) is simultaneously inserted into the through holes of the upper, middle and lower layers, and is fixed in the primary slider (9) through a cover plate (11).

4. The injection mold of the automobile eight-way valve body according to claim 3, characterized in that: The upper, middle and lower layers of the primary slider (9) are provided with pull rod holes (19) that penetrate in the horizontal direction, and one end of the pull rod hole (19) away from the secondary slider (10) is provided with a positioning countersunk hole for limiting the pull rod head of the pull rod (13) at the end of the primary ejection.

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