Clamping mechanism for automobile heater housing injection mold

Abstract

The present invention belongs to the field of injection molds, and specifically discloses a clamping mechanism used in an injection mold for a car heater housing, wherein the clamping block is slidably connected to the lower mold, and the first clamping block is vertically fixedly connected to the second clamping block. The first piston is slidably connected to the first cylinder body, and the second piston is slidably connected to the second cylinder body. The second cylinder body is fixed to the lower mold, the first cylinder body is connected to the second cylinder body, and the first piston rod is fixedly connected to the first piston. The second rack is fixed to the upper mold, and the push-up mechanism includes a push-up cylinder, the rod cavity of the second cylinder body is connected to the rodless cavity of the push-up cylinder, the push-up cylinder is fixedly connected to the bottom of the lower mold, and a plurality of push rods for ejecting molded products are fixedly connected to the piston rod of the push-up cylinder. The piston rod of the push-up cylinder is a telescopic rod. The device solves the problem of low efficiency caused by the need to manually remove the clamping mechanism in the prior art.

Description

Technical Field

[0001] The invention belongs to the field of injection molds, and in particular relates to a clamping mechanism used in an injection mold for a housing of an automobile heater. Background Art

[0002] An injection mold is a tool for producing plastic products; it is also a tool that gives plastic products a complete structure and precise dimensions. Injection molding is a processing method used in the mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted plastic into the mold cavity by an injection molding machine, and after cooling and solidification, a molded product is obtained. Injection molds are divided into two types according to molding characteristics: thermosetting plastic molds and thermoplastic plastic molds; according to the molding process, they are divided into transfer molds, blow molds, casting molds, thermoforming molds, hot compression molds (compression molds), injection molds, etc. Among them, hot compression molds can be divided into three types according to the overflow method: overflow type, semi-overflow type, and non-overflow type. Injection molds can be divided into two types according to the pouring system: cold runner molds and hot runner molds; according to the loading and unloading method, they can be divided into two types: mobile and fixed.

[0003] During the injection molding process of the car heater housing, because the car heater housing has a stepped portion, a clamping mechanism is required to clamp the middle of the car heater housing and assist in molding the outer wall of the car heater housing. Therefore, when opening the mold, the clamping mechanism needs to be removed, which usually requires manual operation and is inefficient. Summary of the invention

[0004] The object of the present invention is to provide a clamping mechanism for an injection mold of a housing of an automobile heater, so as to solve the problem of low efficiency caused by the need to manually remove the clamping mechanism in the prior art.

[0005] In order to achieve the above-mentioned purpose, the basic scheme of the present invention provides a clamping mechanism for an automobile heater housing injection mold, including a pushing mechanism, an upper mold, a lower mold and a clamping mechanism, the clamping mechanism including a pushing cylinder and a plurality of clamping blocks for clamping the automobile heater housing, the clamping block is slidably connected to the lower mold, the clamping block includes a first clamping block and a second clamping block, the first clamping block is vertically fixedly connected to the second clamping block, the pushing cylinder includes a first piston, a second piston, a first cylinder body and a second cylinder body, the first piston is slidably connected to the first cylinder body, the second piston is slidably connected to the second cylinder body, the second cylinder body is fixed on the lower mold, the first cylinder body is connected to the second cylinder body, and the first piston A first piston rod is fixedly connected to the upper part, and a receiving groove for accommodating the first cylinder body is provided on the first clamping block. The end of the first piston rod away from the first piston is fixedly connected to the inner wall of the receiving groove. A second piston rod is fixedly connected to the second piston. The end of the second piston rod away from the second piston is fixedly connected to the first rack. A transmission gear is meshed on the first rack, and a second rack is meshed on the transmission gear. The second rack is fixed on the upper mold. The pushing mechanism includes a pushing cylinder. The rod cavity of the second cylinder body is connected to the rodless cavity of the pushing cylinder. The pushing cylinder is fixedly connected to the bottom of the lower mold. A plurality of ejector rods for ejecting molded products are fixedly connected to the piston rod of the pushing cylinder. The piston rod of the pushing cylinder is a telescopic rod.

[0006] The principle of this basic solution is that when the mold needs to be opened after the automobile heater shell is formed, the upper mold is moved upward. During the upward movement of the upper mold, the transmission gear is driven to rotate through the transmission of the second rack. When the transmission gear rotates, the second piston rod is driven to translate through the transmission of the first rack, and the second piston rod drives the second piston to translate. When the second piston translates, negative pressure is generated in the second cylinder body. The negative pressure causes the first piston in the first cylinder body to translate toward the second cylinder body. When the first piston translates, it drives the first clamping block and the second clamping block to translate. During the movement of the first clamping block, the first clamping block and the second clamping block are gradually separated from the formed automobile heater shell.

[0007] At this time, when the second piston moves, the pressurized gas generated in the rod chamber of the second cylinder body enters the push-up cylinder, causing the piston rod of the push-up cylinder to move upward. At the beginning, because the piston rod of the push-up cylinder is a telescopic rod and contracts, the ejector rod will not move upward. When the first clamping block and the second clamping block are completely separated from the product, the piston rod of the push-up cylinder contracts to the shortest, and the push-up piston continues to move upward to move the ejector rod upward. The upward movement of the ejector rod pushes the product out of the cavity of the lower mold, completing the ejection of the product.

[0008] The beneficial effects of this basic solution are: 1. This device utilizes the movement of the upper mold to simultaneously translate multiple clamping blocks around the product and gradually separate from the product, thus avoiding the problem of low efficiency caused by manual operation.

[0009] 2. In this device, the cooperation of the upper mold, the pushing cylinder and the upper pushing cylinder is utilized to continuously complete the mold opening, the separation of the clamping block and the product and the ejection of the product by the ejector rod, thereby improving the production efficiency.

[0010] 3. The arrangement of the receiving groove in the device enables the first cylinder body to enter the receiving groove, thereby avoiding the situation where the first cylinder body is designed to be too long, resulting in a larger space occupied by the device as a whole.

[0011] Optimization solution 1: The second clamping block is provided with a first cooling airbag, and the first cooling airbag is located between the second clamping block and the second cylinder body. The provision of the first cooling airbag buffers the movement of the second clamping block, preventing the second clamping block from colliding with the second rod body and causing damage to the equipment.

[0012] Optimization solution 2: A second cooling airbag is sleeved on the piston rod of the first cylinder body, and the second cooling airbag is located in the receiving groove. The second cooling airbag buffers the process of inserting the second cylinder body into the receiving groove, preventing the receiving groove from being damaged by direct contact with the cylinder.

[0013] Optimization solution three: The first cooling airbag is connected to a first air nozzle directed toward the molded product, and the second cooling airbag is connected to a second air nozzle directed toward the molded product. The first cooling airbag and the second cooling airbag are provided to cool the product in multiple directions, so that the product is cooled evenly.

[0014] Optimization solution 4: The first and second air nozzles are both made of elastic parts. When the upper mold and the lower mold are closed, the air nozzle supported by the elastic part can be deformed and located between the upper mold and the lower mold, avoiding setting too much space in the upper mold to accommodate the air nozzle, reducing the difficulty of mold processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of a clamping mechanism used in an injection mold for a housing of a car heater according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the A direction;

[0017] Figure 3 for Figure 1 The enlarged view of point B in the middle;

[0018] Figure 4 for Figure 1 Enlarged view of point C in the middle;

[0019] Figure 5 for Figure 2 Enlarged view of point D in the middle. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below through specific embodiments:

[0021] The figure marks in the drawings of the specification include: a first rack 1, a second rack 2, a transmission gear 3, a second cylinder body 4, a first cylinder body 5, a first cooling air bag 6, a second clamping block 7, a first clamping block 8, a lower mold 9, a push rod 10, a push plate 11, a piston rod 12 of a push cylinder, a push cylinder 13, a second piston 14, a first air nozzle 15, a first piston rod 16, a second cooling air bag 17, a first fixed box 18, and a second air nozzle 19.

[0022] Embodiment: The clamping mechanism used in the injection mold of the automobile heater housing in this solution is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, it includes a push mechanism, an upper mold (not shown in the figure), a lower mold 9 and a clamping mechanism, the clamping mechanism includes a push cylinder and three clamping blocks for clamping the housing of the automobile heater, and the three clamping blocks are respectively located on three surfaces of the housing of the automobile heater. The clamping block is slidably connected to the lower mold 9, and the clamping block includes a first clamping block 8 and a second clamping block 7, and the first clamping block 8 is vertically fixedly connected to the second clamping block 7. The first clamping block 8 and the second clamping block 7 are connected in an L shape, and the push cylinder is in a cubic shape. The push cylinder includes a first piston, a second piston 14, a first cylinder body 5 and a second cylinder body 4, and the volume of the first cylinder body 5 is smaller than the volume of the second cylinder body 4. The first piston is slidably connected in the first cylinder body 5, and the second piston 14 is slidably connected in the second cylinder body 4. The second cylinder body 4 is fixed on the lower mold 9, the first cylinder body 5 is connected to the second cylinder body 4, and the first piston rod 16 is fixedly connected to the first piston. The first clamping block 8 is provided with a receiving groove for receiving the first cylinder body 5, and the end of the first piston rod 16 away from the first piston is fixedly connected to the inner wall of the receiving groove. The second piston 14 is fixedly connected to the second piston rod, and the end of the second piston rod away from the second piston 14 is fixedly connected to the horizontal first rack 1, the first rack 1 is meshed with a transmission gear 3, and the transmission gear 3 is meshed with a vertical second rack 2. The transmission gear 3 is rotatably connected to the lower mold 9, and the second rack 2 is fixed to the upper mold, and the transmission gear 3 is located above the second rack 2.

[0023] The push-up mechanism includes a vertical push-up cylinder 13. The rod cavity of the second cylinder body 4 is connected to the rodless cavity of the push-up cylinder 13. A mounting hole is provided at the bottom of the mold, and the mounting hole is located directly below the cavity of the lower mold 9. The push-up cylinder 13 is fixedly connected to the mounting hole at the bottom of the lower mold 9. The piston rod 12 of the push-up cylinder is fixedly connected to a top plate 11. The top plate 11 is fixedly connected to a number of push rods 10 for ejecting the molded product. The top of the push rod 10 is umbrella-shaped, so that the push rod 10 is hung on the lower mold 9 when the product is formed and will not fall off. The piston rod 12 of the push-up cylinder is a telescopic rod.

[0024] The second clamping block 7 is provided with a first cooling airbag 6, which is located between the second clamping block 7 and the second cylinder 4. The first cooling airbag 6 is connected to a first fixing box 18, which is connected to a first air nozzle 15 directed toward the molded product.

[0025] A second cooling airbag 17 is sleeved on the first piston rod 16, and the second cooling airbag 17 is located in the accommodating groove. The second cooling airbag 17 is connected to a second fixing box, and the second fixing box is connected to a second air nozzle 19 directed to the molded product. The first air nozzle 15 and the second air nozzle 19 are both made of elastic parts, preferably rubber.

[0026] When the mold needs to be opened after the automobile heater shell is formed, the upper mold is moved upward. During the upward movement of the upper mold, the second rack 2 is driven upward. When the second rack 2 is driven upward, the transmission gear 3 is driven to rotate. When the transmission gear 3 rotates, it drives the first rack 1 to translate in the direction away from the lower mold 9. When the first rack 1 translates, it drives the second piston rod to translate. The second piston rod drives the second piston 14 to translate. When the second piston 14 translates, negative pressure is generated in the second cylinder body 4. The negative pressure causes the first piston in the first cylinder body 5 to translate toward the second cylinder body 4. When the first piston translates, it drives the first piston rod 16 to move. When the first piston rod 16 moves, it drives the first clamping block 8 and the second clamping block 7 to translate. During the movement of the first clamping block 8, the first clamping block 8 and the second clamping block 7 are gradually separated from the formed automobile heater shell.

[0027] At this time, when the second piston 14 moves, the pressure gas generated in the rod chamber of the second cylinder body 4 enters the push-up cylinder 13, causing the piston rod 12 of the push-up cylinder to move upward. At the beginning, because the piston rod 12 of the push-up cylinder is a telescopic rod and contracts, the push rod 10 will not move upward. When the first clamping block 8 and the second clamping block 7 are completely separated from the product, the piston rod 12 of the push-up cylinder contracts to the shortest, and the push-up piston continues to move upward to move the push rod 10 upward. The upward movement of the push rod 10 pushes the product out of the cavity of the lower mold 9, completing the ejection of the product.

[0028] When the first clamping block 8 translates, the first cylinder 5 enters the receiving groove and squeezes the second cooling airbag 17, and the gas in the second cooling airbag 17 is ejected from the second air nozzle 19 toward the product, thereby further cooling the product and buffering the process of the second cylinder 4 inserting into the receiving groove, thereby preventing the receiving groove from being directly contacted with the cylinder and causing damage to the receiving groove. Furthermore, the setting of the receiving groove enables the first cylinder 5 to enter the receiving groove, thereby avoiding the situation where the first cylinder 5 is designed to be too long, resulting in a larger space occupied by the overall device.

[0029] When the second clamping block 7 translates, it squeezes the first cooling airbag 6, and the gas in the first cooling airbag 6 is ejected toward the product from the first air nozzle 15 to further cool the product. The first cooling airbag 6 and the second cooling airbag 17 are arranged to cool the product in multiple directions, so that the product is cooled evenly.

[0030] The above is only an embodiment of the present invention, and the common knowledge in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A clamping mechanism used in an injection mold for a car heater housing, characterized in that: The invention comprises an upward pushing mechanism, an upper die, a lower die and a clamping mechanism, wherein the clamping mechanism comprises a pushing cylinder and a plurality of clamping blocks for clamping a housing of a car heater, the clamping block is slidably connected to the lower die, the clamping block comprises a first clamping block and a second clamping block, the first clamping block is vertically fixedly connected to the second clamping block, the pushing cylinder comprises a first piston, a second piston, a first cylinder body and a second cylinder body, the first piston is slidably connected to the first cylinder body, the second piston is slidably connected to the second cylinder body, the second cylinder body is fixed to the lower die, the first cylinder body is communicated with the second cylinder body, a first piston rod is fixedly connected to the first piston, a receiving groove for receiving the first cylinder body is provided on the first clamping block, an end of the first piston rod away from the first piston is fixedly connected to the inner wall of the receiving groove, and the second piston is fixedly connected to the A second piston rod is connected, and an end of the second piston rod away from the second piston is fixedly connected to the first rack, the first rack is meshed with a transmission gear, the transmission gear is meshed with a second rack, the second rack is fixed on the upper mold, the pushing mechanism includes an upper pushing cylinder, the rod chamber of the second cylinder body is connected to the rodless chamber of the upper pushing cylinder, the upper pushing cylinder is fixedly connected to the bottom of the lower mold, a plurality of ejector rods for ejecting the molded product are fixedly connected to the piston rod of the upper pushing cylinder, the piston rod of the upper pushing cylinder is a telescopic rod, the second clamping block is provided with a first cooling air bag, the piston rod of the first cylinder body is sleeved with a second cooling air bag, the first cooling air bag is connected with a first air nozzle pointing to the molded product, and the second cooling air bag is connected with a second air nozzle pointing to the molded product.

2. The clamping mechanism for the automobile heater housing injection mold according to claim 1 is characterized in that: The first air nozzle and the second air nozzle are both made of elastic members.

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