Clamping mechanism for engine clamshell injection mold

Abstract

The present invention belongs to the field of injection molds, and specifically discloses a clamping mechanism for an engine flip cover injection mold, including a push rod, a positioning block and a lower mold, wherein the positioning block is slidably connected in the lower mold, a protrusion for forming an oblique buckle is provided below the positioning block, a slider is slidably connected to the lower mold, the push rod has a hinged end and an abutting end, the middle part of the push rod is rotatably connected to the slider, the hinged end is hinged to the side of the positioning block away from the protrusion, a fixed block is provided below the push rod, the fixed block is fixed to the lower mold, the fixed block is located on the side of the push rod center away from the positioning block, and the abutting end can abut against the fixed block when the push rod rotates. This device solves the problem that the protruding part of the positioning block in the prior art cannot be moved out of the recessed part of the oblique buckle, and is suitable for the limited space at the positioning block.

Description

Technical Field

[0001] The invention belongs to the field of injection molds, and in particular relates to a clamping mechanism for an engine flip cover injection mold. 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] The buckle of the engine flip cover is different from the usual flat buckle. The buckle of this product is tilted upward and is an oblique buckle. It is used to be fixed on the engine for a long time. Under the influence of engine vibration, the disengagement rate of the flat buckle is greatly reduced. However, in the prior art, the mold of the engine flip cover usually uses a positioning block and a mold to form a cavity for the flat buckle. After the molding is completed, the positioning block is translated to leak out the buckle to prevent the flat buckle from hanging upside down on the mold when the lower fixed rod pushes out the engine flip cover. However, the hook of this product is tilted upward. When the positioning block is moved away by translation, the protrusion of the recessed part of the oblique buckle formed by the positioning block is located in the recessed part of the oblique buckle and cannot be removed by translation. At the same time, the space at the positioning block is limited, and a more complex structure cannot be set without increasing the volume of the lower mold along the outer edge. Summary of the invention

[0004] The object of the present invention is to provide a clamping mechanism for an engine flip cover injection mold to solve the problem that the protruding portion of the positioning block in the prior art cannot be moved out of the recessed portion of the oblique buckle, while being suitable for the limited space at the positioning block.

[0005] In order to achieve the above-mentioned purpose, the basic scheme of the present invention provides a clamping mechanism for an engine flip cover injection mold, including a push rod, a positioning block and a lower mold, the positioning block is slidably connected in the lower mold, a protrusion for forming an oblique buckle is provided below the positioning block, a slider is slidably connected to the lower mold, the push rod has a hinged end and a resting end, the middle part of the push rod is rotatably connected to the slider, the hinged end is hinged to the side of the positioning block away from the protrusion, a fixed block is provided below the push rod, the fixed block is fixed on the lower mold, the fixed block is located on the side of the center of the push rod away from the positioning block, and the resting end can rest against the fixed block when the push rod rotates.

[0006] The principle of this basic solution is that when in use, the lever is rotated, and when the lever rotates, the positioning block hinged at the hinged end is lifted. Due to the rotation of the lever, the movement trajectory of the positioning block is an arc, with both horizontal and vertical movements. The vertical movement causes the protrusion to leave the concave part of the oblique buckle, and the horizontal movement causes the positioning block to move away from the formed engine flip cover.

[0007] Continue to rotate the push rod, and the abutment part will abut against the fixed block. Because the fixed block is fixed on the lower mold, the push rod drives the slider to slide away from the oblique buckle under the reaction force of the fixed block, that is, drives the positioning block to slide away from the oblique buckle, so that the positioning block is gradually and completely separated from the oblique buckle.

[0008] The beneficial effects of this basic solution are: 1. After the mold is opened, the device lifts up the protrusion that limits the translation of the positioning block, and at the same time enables the translation of the positioning block, thereby solving the problem that the protrusion of the positioning block cannot be moved out of the concave part of the oblique buckle.

[0009] 2. Because the depth of the concave part of the oblique buckle is small and the horizontal length of the oblique buckle is long, the slider moves with the positioning block to prevent the arc movement from only causing the protrusion to leave the concave part of the oblique buckle, but not causing the positioning block to completely leave the oblique opening, causing the positioning block to scratch the oblique buckle when the engine cover is taken out of the lower die.

[0010] 3. This device uses the rotation of the support rod to complete the upward movement, translation and further translation of the positioning block, adapting to the smaller space in the lower mold.

[0011] Optimization plan 1: The fixed block is provided with a sliding hole, a pull rod is slidably connected in the sliding hole, a first wedge is fixedly connected to the end of the pull rod, a plug rod is vertically slidably connected to the fixed block, a second wedge is fixedly connected to the bottom of the plug rod to cooperate with the first wedge to move the plug rod upward, a connecting rod is fixedly connected to the end of the pull rod away from the first wedge, a stopper is fixedly connected to the end of the connecting rod away from the pull rod, the stopper is slidably connected to the lower mold, and the hinged end can abut against the stopper when the stopper rod rotates, an insertion hole matching the position of the fixed block is provided on the side of the positioning block away from the protrusion, and a positioning hole matching the top of the plug rod is provided on the top wall of the insertion hole. The plug rod inserted into the positioning hole fixes the fixed block to the positioning block, keeps the positioning block and the oblique buckle separated, and facilitates the removal of the formed engine flip cover.

[0012] Optimization solution 2: The first wedge block and the second wedge block are both located above the pull rod. When the first wedge block and the second wedge block located above the pull rod are wedged together, the insertion rod moves upward, so that the fixed position of the insertion rod and the positioning block is located above the fixed block, which can better prevent the positioning block from flipping due to gravity.

[0013] Optimization solution three: The cross section of the top of the insertion rod is triangular. The top of the insertion rod with a triangular cross section is convenient for inserting into the positioning hole when the positioning block moves.

[0014] Optimization solution 4: The rotation center of the push rod is fixedly connected with a rotating handle. The setting of the rotating handle facilitates the rotation of the push rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a clamping mechanism for an engine clamshell injection mold according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0017] Figure 3 for Figure 1 Cross-sectional view in the middle BB direction;

[0018] Figure 4 for Figure 2 Enlarged view of point C in the middle;

[0019] Figure 5 for Figure 3 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: lower mold 1, positioning block 2, rotating handle 3, engine flip cover 4, hinged end 5, abutment end 6, stopper 7, sliding rod 8, fixing rod 9, insertion hole 10, connecting rod 11, fixing block 12, abutment rod 13, first wedge block 14, insertion rod 15, second wedge block 16, pull rod 17.

[0022] Embodiment: The clamping mechanism for the engine flip cover injection mold in this solution is as follows: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, it includes a push rod 13, a positioning block 2 and a lower mold 1, wherein the positioning block 2 is slidably connected in the lower mold 1, and a protrusion for forming an oblique buckle is provided below the positioning block 2. A slider is slidably connected to the lower mold 1, and the slider is located on one side of the positioning block 2 and is slidably connected to the positioning block 2. The push rod 13 has a hinged end 5 and abutting end 6, and the middle part of the push rod 13 is rotatably connected to the slider. The hinged end 5 is hinged on the side of the positioning block 2 away from the protrusion, and the hinge between the push rod 13 and the positioning block 2 is higher than the oblique buckle. A fixed block 12 is provided below the push rod 13, and a fixed rod 9 is fixedly connected below the fixed block 12. The end of the fixed rod 9 away from the fixed block 12 is fixed to the lower mold 1, and the fixed block 12 is located on the side of the center of the push rod 13 away from the positioning block 2. The fixed block 12 is located on the rotation path of the abutting end 6, and the abutting end 6 can abut against the fixed block 12 when the push rod 13 rotates. A rotating handle 3 is fixedly connected to the rotation center of the push rod 13.

[0023] The fixed block 12 is provided with a sliding hole, in which a pull rod 17 is slidably connected, and a first wedge block 14 is fixedly connected to the left end of the pull rod 17, and the first wedge block 14 is located in the sliding hole. A vertical plug rod 15 is vertically slidably connected to the fixed block 12, and a second wedge block 16 is fixedly connected to the bottom of the plug rod 15 to cooperate with the first wedge block 14 to move the plug rod 15 upward. The cross section of the top of the plug rod 15 is triangular. The first wedge block 14 and the second wedge block 16 are both located above the pull rod 17, and a vertical connecting rod 11 is fixedly connected to the end of the pull rod 17 away from the first wedge block 14, and a stopper 7 is fixedly connected to the end of the connecting rod 11 away from the pull rod 17, and the stopper 7 is located on the rotation path of the hinged end 5. The stopper 7 is horizontally slidably connected to the lower mold 1 through a sliding rod 8 fixed thereon, and the hinged end 5 can abut against the stopper 7 when the stopper 13 rotates. The side of the positioning block 2 away from the protrusion is provided with an insertion hole 10 matching the position of the fixing block 12. When the push rod 13 is rotated to a vertical position, the fixing block 12 can be inserted into the insertion hole 10. The top wall of the insertion hole 10 is provided with a positioning hole matching the top of the insertion rod 15.

[0024] When in use, the handle 3 is rotated to rotate the lever 13 counterclockwise. When the lever 13 rotates, the positioning block 2 hinged at the hinge end 5 is lifted. Due to the rotation of the lever 13, the movement track of the positioning block 2 is arc-shaped, with both horizontal and vertical movements. The vertical movement causes the protrusion to leave the concave part of the oblique buckle, and the horizontal movement causes the positioning block 2 to move away from the formed engine flip cover 4.

[0025] Continue to rotate the push rod 13 counterclockwise, and the abutting part will abut against the fixed block 12. Because the fixed block 12 is fixed on the lower mold 1, the push rod 13 drives the slider to slide away from the oblique buckle under the reaction force of the fixed block 12, that is, drives the positioning block 2 to slide away from the oblique buckle, so that the positioning block 2 is gradually and completely separated from the oblique buckle.

[0026] Continue to rotate the push rod 13 counterclockwise to insert the fixing block 12 into the insertion hole 10, and at the same time, the hinge part abuts against the block 7, so that the block 7 slides in the direction away from the oblique buckle. The movement of the block 7 drives the pull rod 17 to slide in the direction away from the oblique buckle, and the movement of the pull rod 17 causes the first wedge 14 to wedge with the second wedge 16 and causes the insertion rod 15 to move upward and insert into the positioning hole. The insertion rod 15 inserted into the positioning hole fixes the fixing block 12 with the positioning block 2, maintaining the separation state of the positioning block 2 and the oblique buckle, which is convenient for taking out the formed engine flip cover 4.

[0027] 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. Clamping mechanism for engine clamshell injection mold, Features: It includes a push rod, a positioning block and a lower mold. The positioning block is slidably connected in the lower mold. A protrusion for forming an oblique buckle is provided below the positioning block. A slider is slidably connected to the lower mold. The push rod has a hinged end and a resting end. The middle part of the push rod is rotatably connected to the slider. The hinged end is hinged to the side of the positioning block away from the protrusion. A fixed block is provided below the push rod. The fixed block is fixed on the lower mold. The fixed block is located on the side of the center of the push rod away from the positioning block. When the push rod rotates, the resting end can rest against the fixed block. A rotating handle is fixedly connected to the rotation center of the push rod.

2. The clamping mechanism for the engine flip cover injection mold according to claim 1, Features: The fixed block is provided with a sliding hole, in which a pull rod is slidably connected, a first wedge block is fixedly connected to the end of the pull rod, an insertion rod is vertically slidably connected to the fixed block, a second wedge block is fixedly connected to the bottom of the insertion rod and cooperates with the first wedge block to move the insertion rod upward, an end of the pull rod away from the first wedge block is fixedly connected to a connecting rod, an end of the connecting rod away from the pull rod is fixedly connected to a stopper, the stopper is slidably connected to the lower mold, and the hinged end can abut against the stopper when the stop rod rotates, an insertion hole matching the position of the fixed block is provided on the side of the positioning block away from the protrusion, and a positioning hole matching the top of the insertion rod is provided on the top wall of the insertion hole.

3. The clamping mechanism for the engine flip cover injection mold according to claim 2, Features: The first wedge block and the second wedge block are both located above the pull rod.

Images