Bumper injection mold capable of synchronously ejecting multiple points to reduce cracks

Abstract

The utility model belongs to the technical field of injection molds, and discloses a bumper injection mold capable of reducing cracks through multi-point synchronous ejection, which comprises a lower mold and an upper mold, the upper mold is arranged at the upper end of the lower mold, a telescopic rod is connected between the lower mold and the upper mold, and a positioning sleeve penetrates through the lower end of the lower mold. An ejector rod is arranged in the positioning sleeve, the lower end of the ejector rod is connected with a transmission plate, a protection box is fixed to the lower end of the lower mold, and an electric push rod is fixed to the inner wall of the protection box. According to the bumper injection mold capable of reducing the cracks through multi-point synchronous ejection, by arranging the ejection structure, a bumper can be ejected upwards from the interior of the lower mold after injection molding of the automobile bumper is completed, so that the convenience of taking out the bumper is improved, multi-point synchronous ejection of the bumper can be achieved by arranging the multiple sets of ejection rods, the stress uniformity of the bumper is improved, and the production efficiency is improved. And by means of the structure, the bumper injection molding production efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely is a bumper injection mold of many point synchronous ejection reduces crack. BACKGROUND

[0002] The bumper is equipped with on the front and rear end of the car, not only has the decoration function, more important is to absorb and mitigate external impact force, the safety device of protection car body and passenger safety function, the bumper of the car is usually of plastic material, and the bumper usually needs to use the injection mold in the production process, but the existing injection mold still has some problems when using.

[0003] The existing such as Chinese patent application no. CN201920881546.0 a kind of automobile bumper multi-jet rapid forming injection mold, belong to processing mould technical field.It solves the problem of low efficiency of existing injection mold.The automobile bumper multi-jet rapid forming injection mold, including fixed mould and movable die, fixed mould and movable die are formed with the cavity for product forming and the arc surface, and there is a transition groove on movable die for injection liquid transition flow, transition groove is communicated with cavity, the bottom end of fixed mould is provided with injection plate, the end face of injection plate side towards cavity is provided with a plurality of injection heads corresponding with transition groove, the top end of injection head is communicated with transition groove, the other side end face of injection plate is provided with connecting head for connecting external injection machine, movable die is provided with brake plate, brake plate is provided with the ejector rod assembly that is downwardly penetrated into transition groove;But the bumper injection mold is not provided with ejection structure when using, it is difficult to demould after bumper forming, and it is also easy to cause bumper damage when taking out, and the mold adopts natural heat dissipation, so that the processing efficiency of bumper is lower.

[0004] Therefore, we propose a kind of bumper injection mold of many point synchronous ejection reduces crack, to solve the problems raised in the above. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of bumper injection mold of many point synchronous ejection reduces crack, to solve the problem that the existing injection mold is difficult to demould after bumper forming and also easy to cause bumper damage as described in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of bumper injection mold of many point synchronous ejection reduces crack, including lower die and upper die:

[0007] The upper end of the lower die is provided with the upper die, and the telescopic rod is connected between the lower die and the upper die, the lower end of the lower die is penetrated by the positioning sleeve, and the positioning sleeve is provided with the ejector rod in the inside;

[0008] The top rod lower end is connected with a transmission plate, the lower mold lower end is fixedly provided with a protection box, and the inner wall of the protection box is fixedly provided with an electric push rod, and the tail end of the electric push rod is connected with a transmission push plate.

[0009] The lower mold inner wall is provided with a circulating groove, the protection box is internally fixedly provided with a liquid storage tank, and the left side of the liquid storage tank is fixedly provided with a circulating pump.

[0010] Preferably, the positioning sleeve is fixedly connected with the lower mold, the top rod is slidingly connected with the inner wall of the positioning sleeve, and the top end of the positioning sleeve and the top rod is matched with the shape of the inner wall of the lower mold.

[0011] By the cooperation of the top rod and the positioning sleeve, when the top rod moves upward, the automobile bumper in the lower mold can be pushed out upward for demolding.

[0012] Preferably, the positioning sleeve and the top rod are distributed in an equidistant array, the lower end of the top rod penetrates through the positioning sleeve, the bottom end of the top rod is fixedly provided with a transmission plate, the lower end of the top rod is sleeved with a reset spring, and the upper and lower ends of the reset spring are connected with the positioning sleeve and the transmission plate respectively.

[0013] By the equidistant array distribution of the top rod, the bumper can be synchronously jacked up at multiple points, so that the stress of the bumper can be kept uniform, and the cracking and breaking of the bumper during demolding can be avoided.

[0014] Preferably, the inner wall of the protection box is fixedly provided with a positioning sliding rail, the two ends of the transmission push plate are slidingly connected with the positioning sliding rail, the end of the transmission push plate close to the transmission plate is designed as an inclined surface, and the transmission push plate is in contact with the transmission plate.

[0015] By the extension and retraction of the electric push rod, the transmission push plate can be horizontally moved, when the transmission push plate moves toward the transmission plate, the transmission plate and the top rod can be moved upward, thereby pushing out the bumper in the lower mold, and the design of the positioning sliding rail can improve the activity stability of the transmission push plate.

[0016] Preferably, the two ends of the circulating groove penetrate into the protection box, the lower ends of the two sides of the circulating groove are connected with a flow guide cover, the circulating pump is in communication with the left flow guide cover, and the liquid storage tank is in communication connection with the right flow guide cover.

[0017] By the design of the circulating pump and the cooperation of the flow guide cover, the liquid in the liquid storage tank can be made to flow in the circulating groove, thereby cooling the lower mold, improving the bumper forming speed, and improving the injection efficiency.

[0018] Preferably, the outer wall of the liquid storage tank is fixedly provided with a heat dissipation fin, and the heat dissipation fin is distributed in an equidistant array.

[0019] Adopting the technical scheme, the heat dissipation fins outside the liquid storage tank are used to further improve the cooling speed of the circulating cooling liquid inside the liquid storage tank, and further improve the cooling speed of the lower mold.

[0020] Compared with the prior art, the bumper injection mold with multi-point synchronous ejection and crack reduction has the advantages that:

[0021] 1. The ejection structure is arranged, the bumper can be upwardly ejected in the lower mold after the automobile bumper injection is completed, the convenience of bumper removal is improved, a plurality of ejector rods are arranged, the multi-point synchronous ejection of the bumper is realized, the force uniformity of the bumper is improved, the crack damage is avoided, and the bumper injection production efficiency is improved.

[0022] 2. The liquid cooling circulation structure is arranged, the circulating cooling liquid inside the liquid storage tank is continuously flowed by the water pump during the bumper injection process, the heat carried by the lower mold is continuously taken away by the circulating cooling liquid, the forming speed of the bumper is improved, and the injection efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a whole structure schematic view of the utility model.

[0024] Figure 2 It is a lower mold sectional structure schematic view of the utility model.

[0025] Figure 3 It is a water pump and liquid storage tank structure schematic view of the utility model.

[0026] Figure 4 It is an electric push rod and transmission push plate structure schematic view of the utility model.

[0027] Figure 5 It is an ejector rod and positioning sleeve structure schematic view of the utility model.

[0028] In the drawing: 1, lower mold; 2, upper mold; 3, telescopic rod; 4, positioning sleeve; 5, ejector rod; 6, transmission plate; 7, return spring; 8, positioning slide rail; 9, transmission push plate; 10, electric push rod; 11, protection box; 12, liquid storage tank; 13, circulating pump; 14, flow guide cover; 15, circulating groove. DETAILED DESCRIPTION

[0029] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] Please refer to Figures 1-5 The utility model provides a kind of technical scheme: a bumper injection mold of crack reduction of multi-point synchronous ejection, including lower mould 1 and upper mould 2, the upper mould 2 is arranged on the upper end of lower mould 1, and telescopic link 3 is connected between lower mould 1 and upper mould 2, the lower end of lower mould 1 is penetrated by positioning sleeve 4, and positioning sleeve 4 is provided with ejector rod 5 inside;Positioning sleeve 4 is fixedly connected with lower mould 1, and ejector rod 5 is slidably connected with the inner wall of positioning sleeve 4, and the top of positioning sleeve 4 and ejector rod 5 is compatible with the shape of the inner wall of lower mould 1;The stability of the connection between upper mould 2 and lower mould 1 and the clamping accuracy can be improved by the design of telescopic link 3, and the positioning sleeve 4 and the ejector rod 5 arranged in the lower mould 1 are lifted after the bumper injection is completed, and the ejector rod 5 is clamped with the inner wall of lower mould 1 after reset, and the inner wall of lower mould 1 is kept flat.

[0031] The lower end of the ejector rod 5 is connected with the transmission plate 6, the lower end of the lower mould 1 is fixedly provided with the protection box 11, the inner wall of the protection box 11 is fixedly provided with the electric push rod 10, and the tail end of the electric push rod 10 is connected with the transmission push plate 9;Positioning sleeve 4 and ejector rod 5 are distributed in equidistant array, and the lower end of the ejector rod 5 penetrates the positioning sleeve 4, and the bottom end of the ejector rod 5 is fixedly provided with the transmission plate 6, the lower end of the ejector rod 5 is sleeved with the reset spring 7, and the upper and lower ends of the reset spring 7 are connected with the positioning sleeve 4 and the transmission plate 6 respectively;The inner wall of the protection box 11 is fixedly provided with the positioning slide rail 8, and the both ends of the transmission push plate 9 are slidably connected with the positioning slide rail 8, the end of the transmission push plate 9 near the transmission plate 6 is designed as an inclined surface, and the transmission push plate 9 is in contact with the transmission plate 6;The telescopic electric push rod 10 can drive the transmission push plate 9 to move, when the transmission push plate 9 moves towards the transmission plate 6, it can drive the transmission plate 6 and the ejector rod 5 to move upwards, the ejector rod 5 is used to eject the bumper upwards, and after the transmission push plate 9 resets, the reset spring 7 is used to push the ejector rod 5 to reset downwards.

[0032] The lower mold 1 inner wall is provided with a circulating groove 15, the protective box 11 is internally fixed with a liquid storage tank 12, and the left side of the liquid storage tank 12 is fixed with a circulating pump 13; the two ends of the circulating groove 15 penetrate into the interior of the protective box 11, and the two sides of the circulating groove 15 are connected with the flow guide cover 14, the circulating pump 13 is in conduction with the left flow guide cover 14, and the liquid storage tank 12 is in conduction connection with the right flow guide cover 14; the outer wall of the liquid storage tank 12 is fixed with heat dissipation fins, and the heat dissipation fins are distributed in equidistant array, by the design of the circulating pump 13, the cooling liquid in the liquid storage tank 12 can be driven to flow, and by the cooperation of the two groups of flow guide covers 14 and the circulating groove 15, the cooling liquid circulates in the lower mold 1, thereby improving the cooling speed of the bumper after injection molding, and improving the overall injection molding efficiency.

[0033] Thus, a series of work is completed, and the content not described in detail in the specification belongs to the prior art known to those skilled in the art.

Claims

1. A bumper injection mold for multi-point synchronous ejection to reduce cracking, comprising a lower mold (1) and an upper mold (2), characterized in that: The lower mold (1) is provided with an upper mold (2) at its upper end, and a telescopic rod (3) is connected between the lower mold (1) and the upper mold (2). A positioning sleeve (4) passes through the lower end of the lower mold (1), and a push rod (5) is provided inside the positioning sleeve (4). The lower end of the top rod (5) is connected to a transmission plate (6), the lower end of the lower mold (1) is fixed with a protective box (11), and an electric push rod (10) is fixed on the inner wall of the protective box (11), and the end of the electric push rod (10) is connected to a transmission push plate (9). The lower mold (1) has a circulation groove (15) on its inner wall, and a liquid storage tank (12) is fixed inside the protective box (11), and a circulation pump (13) is fixed on the left side of the liquid storage tank (12).

2. The bumper injection mold for multi-point synchronous ejection to reduce cracking according to claim 1, characterized in that: The positioning sleeve (4) is fixedly connected to the lower mold (1), and the push rod (5) is slidably connected to the inner wall of the positioning sleeve (4). The top ends of the positioning sleeve (4) and the push rod (5) are adapted to the shape of the inner wall of the lower mold (1).

3. A bumper injection mold for reducing cracks through multi-point synchronous ejection as described in claim 2, characterized in that: The positioning sleeve (4) and the top rod (5) are arranged in an equidistant array, and the lower end of the top rod (5) passes through the positioning sleeve (4). The bottom end of the top rod (5) is fixed with a transmission plate (6). The lower end of the top rod (5) is fitted with a reset spring (7), and the upper and lower ends of the reset spring (7) are connected to the positioning sleeve (4) and the transmission plate (6) respectively.

4. The bumper injection mold for reducing cracks through multi-point synchronous ejection as described in claim 1, characterized in that: The inner wall of the protective box (11) is fixed with a positioning slide rail (8), and the two ends of the transmission push plate (9) are slidably connected to the positioning slide rail (8). The end of the transmission push plate (9) near the transmission plate (6) is designed with an inclined surface, and the transmission push plate (9) is in contact with the transmission plate (6).

5. A bumper injection mold for reducing cracks through multi-point synchronous ejection as described in claim 1, characterized in that: The circulation tank (15) extends through both ends into the protective box (11), and the lower ends of both sides of the circulation tank (15) are connected to the flow guide (14). The circulation pump (13) is connected to the left flow guide (14), and the liquid storage tank (12) is connected to the right flow guide (14).

6. A bumper injection mold for reducing cracks through multi-point synchronous ejection as described in claim 5, characterized in that: The outer wall of the liquid storage tank (12) is fixed with heat dissipation fins, and the heat dissipation fins are distributed in an equidistant array.

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