An adjustable cavity type injection mold

Abstract

The present invention discloses an adjustable cavity type injection mold, comprising a mold base, a mold body arranged on the mold base, a mold cavity is provided on the top surface of the mold body, the bottom wall of the mold cavity comprises a central molding area and an adjustment area around the central molding area, a plurality of expansion jacks are evenly provided in the adjustment area, an L-shaped buckle groove is provided on the top of the side wall of the expansion jack, a filling block is provided in the expansion jack, a pressing spring is fixed between the filling block and the bottom wall of the expansion jack, and a plug plate is provided, a round hole is provided on the plug plate, a cylindrical rod is provided in the round hole, the bottom end of the cylindrical rod extends out of the bottom surface of the plug plate, a buckle convex block is integrally formed at the bottom of the side wall of the plug plate, and a straight or cross-shaped operating groove is provided at the top of the cylindrical rod. The structure of the present invention is reasonable, and different plug plates can be selected for combination according to the requirements of the injection molding size, so that the size of the mold cavity including the central molding area is changed, the installation and positioning operation of the plug plate is convenient and fast, and the applicability and practicality are strong.

Description

Technical Field

[0001] The invention belongs to the technical field of molds, and in particular relates to an adjustable cavity type injection mold. Background Art

[0002] An injection mold is a tool for producing plastic products and also a tool for giving plastic products a complete structure and precise dimensions. Specifically, it refers to injecting heated and melted plastic into a mold cavity, and obtaining a molded product after cooling and solidification. Injection molds in the prior art mostly have fixed mold cavities and can only process one corresponding product, which not only causes great restrictions, but also causes a great waste of resources and is not conducive to storage, so the applicability and practicality are limited. Summary of the invention

[0003] The purpose of the present invention is to provide an adjustable cavity type injection mold with reasonable structure and strong applicability.

[0004] The technical solution for achieving the purpose of the present invention is an adjustable cavity type injection mold, comprising a mold base, a mold body arranged on the mold base, a mold cavity is formed on the top surface of the mold body, the bottom wall of the mold cavity comprises a central molding area and an adjustment area around the central molding area, a plurality of expansion jacks are evenly formed in the adjustment area, and an L-shaped buckle groove is formed on the top of the side wall of the expansion jack;

[0005] A filling block is arranged in the expansion socket, and a pressure spring is fixed between the filling block and the bottom wall of the expansion socket. Under the action of the pressure spring, the top surface of the filling block and the bottom wall of the mold cavity are in the same plane;

[0006] A plug plate is also provided, the plug plate is provided with a round hole, a cylindrical rod is provided in the round hole, and the bottom end of the cylindrical rod extends out of the bottom surface of the plug plate;

[0007] The bottom of the side wall of the plug board is integrally formed with a buckle protrusion, and the top of the cylindrical rod is provided with a straight or cross-shaped operating groove;

[0008] When adjusting the mold cavity, the insert plate is inserted into the mold cavity and the snap-in protrusion at the bottom end of the cylindrical rod is inserted into the vertical part of the L-shaped snap-in groove. At the same time, the filling block is pressed downward and rotated into the horizontal part of the L-shaped snap-in groove for positioning. At this time, the bottom surface of the insert plate is sealed against the bottom wall of the mold cavity.

[0009] Further preferably, a pressing slot is provided on the side wall of the mold cavity, and a pressing column is provided in the pressing slot;

[0010] An electric telescopic rod is fixed on the outer wall of the mold body, and the electric telescopic rod extends into the pressing slot and is connected to the pressing column;

[0011] A lock clamping portion is fixed to the inner end of the pressure column, and a lock positioning clamping block is fixed to the outer side of the plug plate. After the plug plate is installed, the lock clamping portion and the lock positioning clamping block are clamped and fixed to position the plug plate.

[0012] Further preferably, a dovetail-shaped slot is provided on the inner wall of the mold cavity, and the bottom end of the dovetail-shaped slot extends to the bottom end of the pressing slot hole;

[0013] A dovetail-shaped plug is arranged in the dovetail-shaped slot, and the pressing column is in the pressing slot when not in use. The dovetail-shaped plug moves downward to close the pressing slot, and the outer side surface of the dovetail-shaped plug is in the same plane as the inner wall of the mold cavity.

[0014] It is further preferred that: the bottom wall of the central molding area is provided with an ejection cavity, and a discharge ejection block is provided in the top cavity;

[0015] An electric lifting rod fixed to the bottom surface of the unloading ejecting block is fixed on the die base, and the unloading ejecting block ejects the workpiece in the die cavity upwards under the action of the electric lifting rod to realize unloading.

[0016] Further preferably, a spiral cooling channel is fixed in the bottom wall of the mold body, and an inlet terminal and an outlet terminal connected to the spiral cold spring channel are fixed at the bottom of the mold base.

[0017] It is further preferred that: the bottom surface of the plug board is wrapped with a high temperature resistant sealing rubber layer.

[0018] It is further preferred that: a switch panel connected to the electric telescopic rod and the electric lifting rod is fixed on the mold base.

[0019] The present invention has positive effects: the structure of the present invention is reasonably arranged, and an adjustment area is provided. Different plug plates can be selected for combination according to the requirements of the injection molding size, so that the size of the mold cavity including the central molding area is changed, and the requirements of injection molding processing of different sizes are met, which is beneficial to improving the processing efficiency and the utilization efficiency of the mold, and reducing the mold cost. At the same time, the installation and positioning operations of the plug plates are convenient and fast, and the integrity of the mold cavity can be guaranteed when not installed. The application range is wider, which is beneficial to improving the stability and reliability of use, and the applicability is strong and the practicability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2It is a top view of the structure of the mold body in the present invention.

[0023] Figure numerals: mold base 1, switch panel 22, mold body 2, mold cavity 3, central molding area 4, adjustment area 5, extension jack 6, L-shaped snap groove 7, filling block 8, pressure spring 9, plug plate 10, round hole 11, cylindrical rod 12, snap protrusion 13, operating groove 14, pressure slot 15, pressure column 16, electric telescopic rod 17, lock clamping part 18, lock positioning clamp 19, dovetail slot 20, dovetail plug 21, ejection cavity 23, unloading ejector block 24, electric lifting rod 25, spiral cooling channel 26, entry terminal 27, discharge terminal 28. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] Example

[0026] See Figure 1 to Figure 2 As shown, an adjustable cavity type injection mold includes a mold base 1. In this embodiment, the mold base can be made of plastic or metal structure, which is mainly used to fix and install the mold structure. In order to facilitate operation and control, a switch panel 22 connected to the electric telescopic rod and the electric lifting rod is fixed on the mold base.

[0027] The mold body 2 is arranged on the mold base. The mold body is a conventional structure of the prior art, so it is not described in detail. It can be fixed on the mold base by a screw or a clamping block to prevent displacement or tilting during injection molding, so as to ensure the quality of injection molding. A mold cavity 3 is provided on the top surface of the mold body. The bottom wall of the mold cavity includes a central molding area 4 and an adjustment area 5 located around the central molding area. The central molding area is the minimum processing size and cannot be adjusted. The adjustment area is mainly used to install different plug boards as needed. In order to improve the overall cooling efficiency, a spiral cooling channel 26 is fixed in the bottom wall of the mold body, and an entry terminal 27 and an exhaust terminal 28 connected to the spiral cold spring channel are fixed at the bottom of the mold base. It is used to quickly cool and mold the finished product in the mold cavity to improve the molding efficiency.

[0028] The adjustment area is evenly provided with a plurality of expansion jacks 6, and the top of the side wall of the expansion jack is provided with an L-shaped snap groove 7. The L-shaped snap groove is used to facilitate insertion and rotational positioning. A filling block 8 is provided in the expansion jack. In this embodiment, the material of the filling block is consistent with the material of the mold body, and it is mainly used to seal the expansion jack when the plug board is not inserted to ensure the effectiveness of injection molding.

[0029] A pressure spring 9 is fixed between the filling block and the bottom wall of the expansion jack. Under the action of the pressure spring, the top surface of the filling block is in the same plane with the bottom wall of the mold cavity. Under the action of the pressure spring, the filling block makes the top surface and the bottom wall of the mold cavity in the same plane, thereby improving the quality of the injection molded product and avoiding the influence of the expansion jack on the injection molded product. A plug plate 10 is also provided. In this embodiment, the plug plates are plug plates of different sizes. Different sizes of plug plates are selected according to different mold cavities, so that the surrounding plug plates are combined into mold cavities of different sizes to process different sizes. At the same time, in actual application, the bottom surface of the plug plate is wrapped with a high temperature resistant sealing rubber layer.

[0030] A circular hole 11 is provided on the plug plate, and a cylindrical rod 12 is provided in the circular hole. In the present embodiment, the size of the cylindrical rod is the same as the diameter of the circular hole, and the cylindrical rod can be made of metal or plastic material. It is mainly used to pass through the plug plate to position the plug plate and the expansion jack. The bottom end of the cylindrical rod extends out of the bottom surface of the plug plate, and a snap-on protrusion 13 is integrally formed at the bottom of the side wall of the plug plate. The length of the snap-on protrusion is the same as the depth of the L-shaped snap-on groove. A straight-line or cross-shaped operating groove 14 is provided on the top of the cylindrical rod. When adjusting the mold cavity, the plug plate is inserted into the mold cavity and the snap-on protrusion at the bottom end of the cylindrical rod is inserted into the vertical part of the L-shaped snap-on groove, and at the same time, the filling block is pressed downward and rotated into the horizontal part of the L-shaped snap-on groove for positioning. At this time, the bottom surface of the plug plate is sealed and fitted with the bottom wall of the mold cavity.

[0031] A pressing slot 15 is provided on the side wall of the mold cavity, and a pressing column 16 is arranged in the pressing slot. In the present embodiment, the pressing column is a metal or plastic structure, which is mainly used to press against the outer side surface of the plug board during use to ensure the position accuracy of the plug board, prevent tilting or displacement, and ensure the quality of the finished product. An electric telescopic rod 17 is fixed on the outer wall of the mold body, and the electric telescopic rod extends into the pressing slot and is connected to the pressing column. A locking clamping part 18 is fixed to the inner end of the pressing column, and the locking clamping part is a C-shaped structure with a locking screw. A locking positioning clamping block 19 is fixed to the outer side surface of the plug board. The material of the locking positioning clamping block is consistent with that of the plug board, and is mainly used for connection with the locking clamping part. After the plug board is installed, the locking clamping part and the locking positioning clamping block are clamped and fixed to position the plug board.

[0032] A dovetail slot 20 is provided on the inner wall of the mold cavity, and the bottom end of the dovetail slot extends to the bottom end of the pressing slot. A dovetail plug 21 is provided in the dovetail slot. In the present embodiment, the dovetail plug is a high temperature resistant plastic structure, which is mainly used to close the pressing slot when the pressing column is not in use to avoid affecting the quality of injection molding. When the pressing column is in use, it is only necessary to pull out the dovetail plug, which is more convenient to operate. When the pressing column is not in use, it is in the pressing slot, and the dovetail plug moves downward to close the pressing slot, and the outer side surface of the dovetail plug is on the same plane as the inner wall of the mold cavity.

[0033] The bottom wall of the central molding area is provided with an ejection cavity 23, and a discharge ejector block 24 is arranged in the top cavity. An electric lifting rod 25 fixed to the bottom surface of the discharge ejector block is fixed on the mold base. Under the action of the electric lifting rod, the discharge ejector block ejects the workpiece in the mold cavity upward to realize discharge. The discharge ejector block is a metal or plastic structure, which is mainly used to eject the product from the mold cavity to complete the discharge operation after the injection molding product is processed, which is conducive to improving the efficiency of discharge and can also avoid affecting the quality of the finished product.

[0034] The structure of the present invention is reasonably arranged, and an adjustment area is provided. Different plug plates can be selected for combination according to the requirements of injection molding size, so that the size of the mold cavity including the central molding area is changed, and the requirements of injection molding processing of different sizes are met, which is beneficial to improving the processing efficiency and the utilization efficiency of the mold and reducing the mold cost. At the same time, the installation and positioning operations of the plug plates are convenient and fast, and the integrity of the mold cavity can be guaranteed when not installed. The application range is wider, which is beneficial to improving the stability and reliability of use, and the applicability is strong and the practicability is good.

[0035] The standard parts used in this embodiment can be purchased directly from the market, and the non-standard structural components recorded in the specification and the drawings can also be directly processed according to the existing technical common sense. At the same time, the connection method of each component adopts the mature conventional means in the prior art, and the machinery, parts and equipment all adopt the conventional models in the prior art, so no specific description will be given here.

[0036] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the essential spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. An adjustable cavity type injection mold, comprising a mold base, a mold body arranged on the mold base, a mold cavity being formed on the top surface of the mold body, and characterized in that: The bottom wall of the mold cavity includes a central molding area and an adjustment area around the central molding area, the adjustment area is evenly provided with a plurality of expansion jacks, and the top of the side wall of the expansion jack is provided with an L-shaped buckle groove; A filling block is arranged in the expansion socket, and a pressure spring is fixed between the filling block and the bottom wall of the expansion socket. Under the action of the pressure spring, the top surface of the filling block and the bottom wall of the mold cavity are in the same plane; A plug plate is also provided, the plug plate is provided with a round hole, a cylindrical rod is provided in the round hole, and the bottom end of the cylindrical rod extends out of the bottom surface of the plug plate; The bottom of the side wall of the plug board is integrally formed with a buckle protrusion, and the top of the cylindrical rod is provided with a straight or cross-shaped operating groove; When adjusting the mold cavity, the insert plate is inserted into the mold cavity and the snap-in protrusion at the bottom end of the cylindrical rod is inserted into the vertical part of the L-shaped snap-in groove. At the same time, the filling block is pressed downward and rotated into the horizontal part of the L-shaped snap-in groove for positioning. At this time, the bottom surface of the insert plate is sealed against the bottom wall of the mold cavity.

2. The adjustable cavity type injection mold according to claim 1, characterized in that: A pressing slot hole is provided on the side wall of the mold cavity, and a pressing column is provided in the pressing slot hole; An electric telescopic rod is fixed on the outer wall of the mold body, and the electric telescopic rod extends into the pressing slot and is connected to the pressing column; A lock clamping portion is fixed to the inner end of the pressure column, and a lock positioning clamping block is fixed to the outer side of the plug plate. After the plug plate is installed, the lock clamping portion and the lock positioning clamping block are clamped and fixed to position the plug plate.

3. The adjustable cavity type injection mold according to claim 2, characterized in that: A dovetail-shaped slot is provided on the inner wall of the mold cavity, and the bottom end of the dovetail-shaped slot extends to the bottom end of the pressing slot hole; A dovetail-shaped plug is arranged in the dovetail-shaped slot, and the pressing column is in the pressing slot when not in use. The dovetail-shaped plug moves downward to close the pressing slot, and the outer side surface of the dovetail-shaped plug is in the same plane as the inner wall of the mold cavity.

4. The adjustable cavity type injection mold according to claim 3, characterized in that: The bottom wall of the central forming area is provided with an ejection cavity, and a discharge ejection block is arranged in the top cavity; An electric lifting rod fixed to the bottom surface of the unloading ejecting block is fixed on the die base, and the unloading ejecting block ejects the workpiece in the die cavity upwards under the action of the electric lifting rod to realize unloading.

5. The adjustable cavity type injection mold according to claim 4, characterized in that: A spiral cooling channel is fixed in the bottom wall of the mold body, and an inlet terminal and a discharge terminal connected to the spiral cold spring channel are fixed at the bottom of the mold base.

6. The adjustable cavity type injection mold according to claim 5, characterized in that: The bottom surface of the plug board is wrapped with a high temperature resistant sealing rubber layer.

7. The adjustable cavity type injection mold according to claim 6, characterized in that: A switch panel connected with the electric telescopic rod and the electric lifting rod is fixed on the mold base.

Images