Ergonomic plastic chair injection mold with protection structure

Abstract

The utility model relates to the technical field of injection molds, and discloses an ergonomic plastic chair injection mold with a protection structure, which comprises a mold body, the mold body comprises a fixed mold and a movable mold, the fixed mold is provided with an injection molding hole, the side wall of the movable mold is fixedly provided with a guide rod, and the guide rod is provided with a protection structure. According to the ergonomic plastic chair injection mold with the protection structure, after the movable mold is separated from the fixed mold, an injection molding part separated from the movable mold can be borne through the horizontally-arranged discharging plate, the injection molding part is prevented from directly falling on the ground, when the movable mold and the fixed mold are closed, the injection molding part is prevented from falling off, and the safety of the injection molding part is improved. And the discharging plate can slowly rotate downwards by matching with the connecting rod and the sliding block, so that the injection molding part can slowly slide downwards through the inclined surface of the discharging plate, the injection molding part of the ergonomic plastic chair can be stably discharged, the injection molding part is prevented from being broken, and the production yield of the injection molding part is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an ergonomic plastic chair injection mold with a protection structure. Background Art

[0002] Injection mold is a molding method that combines injection and molding. Injection mold is formed by injecting completely molten molten material into a concave mold at a certain temperature with high pressure, and then cooling and solidifying it. It has the advantages of fast production speed and high efficiency.

[0003] Ergonomic plastic chairs are usually produced by injection molds. After the injection molding is completed and cooled, the movable mold and the fixed mold of the injection mold need to be separated, and the ejector inside the movable mold is used to eject the injection molded part, thereby completing the demolding of the injection molded part.

[0004] However, most of the injection molds on the market currently lack devices that can protect the injection-molded parts during demolding. When the ejector pin pushes the injection-molded part out of the moving mold, the injection-molded part will fall directly downward. However, when demolding larger injection-molded parts such as ergonomic plastic chairs, direct ejection by the ejector pin can easily cause the injection-molded parts to break, which in turn affects the production yield of the product. Utility Model Content

[0005] The purpose of the utility model is to provide an ergonomic plastic chair injection mold with a protective structure to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an ergonomic plastic chair injection mold with a protective structure, comprising a mold body, the mold body comprising a fixed mold and a movable mold, an injection hole is opened on the fixed mold, a guide rod is fixedly installed on the side wall of the movable mold, and the end of the guide rod away from the movable mold passes through the fixed mold, a cylinder is fixedly installed on the inner wall of the movable mold, a push plate is fixedly installed on the piston end of the cylinder, and multiple groups of ejectors are fixedly installed on the side wall of the push plate, and the end of the ejector away from the push plate passes through the movable mold, and a material discharge mechanism for protecting the product is arranged on the mold body, and the injection molded parts can be slowly discharged downward by arranging the material discharge mechanism to avoid the injection molded parts from being broken and improve the production yield of the injection molded parts, and the material discharge mechanism comprises:

[0007] A boss, one end of which is fixedly mounted on the bottom of the fixed mold, and the other end of which is hinged with a blanking plate, by which the injection molded parts can be slowly discharged downward to prevent the injection molded parts from falling directly to the ground;

[0008] A slider, the slider being slidably connected to the side wall of the blanking plate;

[0009] A connecting rod, one end of which is hinged to the side wall of the movable mold, and the other end of which is hinged to the side wall of the slider. The connecting rod is arranged to cooperate with the movement of the movable mold to drive the blanking plate to rotate.

[0010] Preferably, an auxiliary mechanism is provided on the blanking plate, by which the injection molded parts can be protected after demolding to prevent them from falling. The auxiliary mechanism includes a movable plate, and a sliding rod is fixedly installed on the bottom of the movable plate. The end of the sliding rod away from the movable plate passes through the blanking plate, and the sliding rod is slidably connected to the penetration point of the blanking plate.

[0011] Preferably, a sponge is fixedly mounted on the upper surface of the movable plate, and the sponge can provide buffer protection for the dropped injection molded parts.

[0012] Preferably, a spring is sleeved on the outer wall of the sliding rod.

[0013] Preferably, one end of the spring is fixedly mounted on the bottom of the movable plate, and the other end of the spring is fixedly mounted on the top of the blanking plate.

[0014] Preferably, the guide rod is slidably connected to a penetration point of the fixed mold, and the ejector pin is slidably connected to a penetration point of the movable mold.

[0015] Compared with the prior art, the utility model provides an ergonomic plastic chair injection mold with a protective structure, which has the following beneficial effects:

[0016] 1. The ergonomic plastic chair injection mold with a protective structure can use a horizontally placed blanking plate to receive the injection molded parts that escape from the movable mold after the movable mold is separated from the fixed mold, so as to prevent the injection molded parts from falling directly to the ground. When the movable mold is closed with the fixed mold, the blanking plate can be slowly rotated downward in conjunction with the connecting rod and the slider, so that the injection molded parts can slowly slide downward through the inclined surface of the blanking plate, so that the injection molded parts of the ergonomic plastic chair can be stably discharged, so as to prevent the injection molded parts from being damaged and improve the production yield of the injection molded parts.

[0017] 2. The ergonomic plastic chair injection mold with a protective structure can provide a cushioning effect for the injection molded parts when the injection molded parts inside the movable mold fall down onto the blanking plate by setting the sponge, and can also protect the injection molded parts. At the same time, the movable plate is used in conjunction with the sliding rod and the spring to further provide cushioning protection for the falling injection molded parts, thereby fully protecting the demolded injection molded parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the mold body of the utility model in the demoulding state;

[0019] Figure 2 This is a schematic diagram of the structure of the mold body of the utility model in the injection molding state;

[0020] Figure 3 It is a schematic diagram of the cross-sectional structure of the movable mold of the utility model;

[0021] Figure 4 This is a schematic diagram of the overall structure of the blanking plate of the utility model;

[0022] Figure 5 For this utility model Figure 1 A is an enlarged structural diagram of FIG.

[0023] In the figure: 1. mold body; 11. fixed mold; 22. movable mold; 3. injection hole; 4. guide rod; 5. cylinder; 6. push plate; 7. ejector; 8. unloading mechanism; 81. boss; 82. slider; 83. connecting rod; 84. unloading plate; 9. auxiliary mechanism; 91. movable plate; 92. slide rod; 93. sponge; 94. spring. DETAILED DESCRIPTION

[0024] like Figure 1-Figure 5 As shown, the utility model provides a technical solution: an ergonomic plastic chair injection mold with a protective structure, comprising a mold body 1, the mold body 1 comprising a fixed mold 11 and a movable mold 22, the fixed mold 11 needs to be fixedly installed on an injection molding machine by bolts when put into use, the movable mold 22 needs to be installed on the hydraulic cylinder piston end of the injection molding machine by bolts when put into use, an injection hole 3 is opened on the fixed mold 11, a guide rod 4 is fixedly installed on the side wall of the movable mold 22, the end of the guide rod 4 away from the movable mold 22 penetrates the fixed mold 11, the guide rod 4 is slidably connected to the penetration of the fixed mold 11, the guide rod 4 can prevent the movable mold 22 from deviating from the fixed mold 11, the inner wall of the movable mold 22 is fixedly installed with a cylinder 5, and the cylinder 5 is fixedly installed on the inner wall of the movable mold 22. A push plate 6 is fixedly installed on the piston end of the cylinder 5, and a plurality of groups of ejector pins 7 are fixedly installed on the side wall of the push plate 6. The end of the ejector pin 7 away from the push plate 6 penetrates the movable mold 22, and the ejector pin 7 is slidably connected to the penetration point of the movable mold 22. After the injection molded parts of the ergonomic plastic chair are cooled, the hydraulic cylinder on the injection molding machine drives the movable mold 22 to move, so that the movable mold 22 is separated from the fixed mold 11, and then the cylinder 5 is started to push the push plate 6, so that the push plate 6 drives the ejector pin 7 to move to the outside of the movable mold 22, and the injection molded parts inside the movable mold 22 are ejected by the ejector pin 7. A material discharge mechanism 8 for protecting the product is provided on the mold body 1. By providing the material discharge mechanism 8, the injection molded parts can be slowly discharged downward to avoid damage to the injection molded parts and improve the production yield of the injection molded parts.

[0025] The above-mentioned unloading mechanism 8 includes a boss 81, a slider 82, a connecting rod 83, and an unloading plate 84; one end of the boss 81 is fixedly installed at the bottom of the fixed mold 11, and the other end of the boss 81 is hinged with the unloading plate 84, and the slider 82 is slidably connected to the side wall of the unloading plate 84. When the movable mold 22 is separated from the fixed mold 11, the movable mold 22 will pull the connecting rod 83, and the connecting rod 83 will pull the slider 82 in the direction close to the movable mold 22, and at the same time, the slider 82 will pull the unloading plate 8 4. The blanking plate 84 is rotated upward to a horizontal state to facilitate receiving the injection molded parts that escape from the movable mold 22. One end of the connecting rod 83 is hinged to the side wall of the movable mold 22, and the other end of the connecting rod 83 is hinged to the side wall of the slider 82. When the movable mold 22 gradually approaches the fixed mold 11, the blanking plate 84 can be gradually rotated downward in coordination with the connecting rod 83 and the slider 82, so that the injection molded parts can slowly slide downward through the blanking plate 84, thereby avoiding damage to the injection molded parts and improving the production yield of the injection molded parts.

[0026] The above-mentioned blanking plate 84 is provided with an auxiliary mechanism 9, by which the injection molded parts after demoulding can be protected to prevent the injection molded parts from being damaged. The auxiliary mechanism 9 includes a movable plate 91, a slide bar 92, a sponge 93, and a spring 94; a slide bar 92 is fixedly installed at the bottom of the movable plate 91, and the end of the slide bar 92 away from the movable plate 91 passes through the blanking plate 84, and the slide bar 92 is slidably connected to the penetration of the blanking plate 84. When the injection molded part falls downward onto the sponge 93, the movable plate 91 will be subjected to the downward force of the injection molded part, thereby driving the movable plate 91 to The slide bar 92 slides downward and compresses the spring 94. A sponge 93 is fixedly installed on the upper surface of the movable plate 91. The sponge 93 can cushion the falling injection molded parts and protect the injection molded parts. The outer wall of the slide bar 92 is sleeved with a spring 94. One end of the spring 94 is fixedly installed on the bottom of the movable plate 91, and the other end of the spring 94 is fixedly installed on the top of the blanking plate 84. The spring 94 can be used to convert the impact force of the injection molded parts falling downward into the elastic potential energy of the spring 94, thereby cushioning and protecting the injection molded parts falling downward.

[0027] Working principle: After the injection molded parts of the ergonomic plastic chair are cooled, the hydraulic cylinder on the injection molding machine drives the movable mold 22 to move, so that the movable mold 22 is separated from the fixed mold 11. At the same time, the movable mold 22 will pull the connecting rod 83. At this time, the connecting rod 83 will pull the slider 82 in the direction close to the movable mold 22, so that the slider 82 slides on the side wall of the blanking plate 84, and pulls the blanking plate 84 to rotate upward. After the blanking plate 84 rotates to a horizontal state, the cylinder is started again. 5 pushes the push plate 6, so that the push plate 6 drives the ejector pin 7 to move to the outside of the movable mold 22, and the injection molded part inside the movable mold 22 is ejected by the ejector pin 7, so that the injection molded part falls downward onto the sponge 93. The sponge 93 can cushion the falling injection molded part and protect the injection molded part. When the injection molded part falls downward onto the sponge 93, the movable plate 91 is subjected to the downward force of the injection molded part, so that the movable plate 91 drives the slide bar 92 to slide downward and compresses the spring 9 4, so that the impact force of the injection molded part falling downward can be converted into the elastic potential energy of the spring 94, and then the injection molded part falling downward can be buffered and protected to avoid the injection molded part from being damaged. When the injection molded part falls onto the sponge 93, the hydraulic cylinder on the injection molding machine is started again to drive the movable mold 22 to move toward the end close to the fixed mold 11, and the movable mold 22 and the fixed mold 11 are overlapped together, and the next injection molded part can be made. When the movable mold 22 is close to the fixed mold 11, the movable mold 22 will push the connecting rod 83, so that the connecting rod 83 pushes the slider 82, and the slider 82 moves toward the end close to the fixed mold 11. At this time, the slider 82 will slide on the side wall of the unloading plate 84 and push the unloading plate 84, so that the unloading plate 84 slowly rotates downward. The injection molded part on the sponge 93 can slowly slide downward by slowly rotating the unloading plate 84, so that the injection molded part of the ergonomic plastic chair can be stably unloaded, the injection molded parts can be avoided from being damaged, and the injection molded parts production yield can be improved.

[0028] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An injection mold for an ergonomic plastic chair with a protective structure, comprising a mold body (1), characterized in that: The mold body (1) comprises a fixed mold (11) and a movable mold (22), the fixed mold (11) is provided with an injection hole (3), a guide rod (4) is fixedly mounted on the side wall of the movable mold (22), the end of the guide rod (4) away from the movable mold (22) passes through the fixed mold (11), a cylinder (5) is fixedly mounted on the inner wall of the movable mold (22), a push plate (6) is fixedly mounted on the piston end of the cylinder (5), a plurality of groups of ejector pins (7) are fixedly mounted on the side wall of the push plate (6), the end of the ejector pin (7) away from the push plate (6) passes through the movable mold (22), and a material discharge mechanism (8) for protecting the product is arranged on the mold body (1), the material discharge mechanism (8) comprises: A boss (81), one end of the boss (81) is fixedly mounted on the bottom of the fixed mold (11), and the other end of the boss (81) is hingedly connected to a blanking plate (84); A slider (82), wherein the slider (82) is slidably connected to a side wall of a blanking plate (84); A connecting rod (83), one end of which is hinged to the side wall of the movable mold (22), and the other end of which is hinged to the side wall of the slider (82).

2. The ergonomic plastic chair injection mold with a protective structure according to claim 1, characterized in that: The blanking plate (84) is provided with an auxiliary mechanism (9), and the auxiliary mechanism (9) includes a movable plate (91), and a sliding rod (92) is fixedly installed at the bottom of the movable plate (91), and one end of the sliding rod (92) away from the movable plate (91) passes through the blanking plate (84), and the sliding rod (92) is slidably connected to the penetration point of the blanking plate (84).

3. The ergonomic plastic chair injection mold with a protective structure according to claim 2, characterized in that: A sponge (93) is fixedly mounted on the upper surface of the movable plate (91).

4. The ergonomic plastic chair injection mold with a protective structure according to claim 2, characterized in that: The outer wall of the sliding rod (92) is sleeved with a spring (94).

5. The ergonomic plastic chair injection mold with a protective structure according to claim 4, characterized in that: One end of the spring (94) is fixedly mounted on the bottom of the movable plate (91), and the other end of the spring (94) is fixedly mounted on the top of the blanking plate (84).

6. The ergonomic plastic chair injection mold with a protective structure according to claim 1, characterized in that: The guide rod (4) is slidably connected to the through-hole of the fixed mold (11), and the ejector pin (7) is slidably connected to the through-hole of the movable mold (22).

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