Double-color injection molding machine capable of automatically separating middle frame

Abstract

A double-color injection molding machine capable of automatically separating a middle frame relates to the field of sole processing equipment, and is characterized in that an upper mold, the middle frame and a lower mold are sequentially arranged on a bracket from top to bottom; the turnover mechanism is arranged on the support, connected with the upper die and drives the upper die to turn upwards. One end of the middle frame is rotationally connected with the upper die and moves up and down along with the upper die. The lifting mechanism is arranged on the support and connected with the lower die to drive lifting. The locking mechanism is arranged on the bracket and is used for locking the turnover mechanism; the demolding mechanism comprises a mounting block and a limiting block, the mounting block is arranged on the support and located on the side of the middle frame, and the side, close to the middle frame, of the mounting block sinks inwards to form a limiting groove extending in the vertical direction; one end of the limiting block is connected with the middle frame, the other end of the limiting block extends and is arranged in the limiting groove in a lifting mode, the limiting block moves upwards along with the middle frame to the top of the limiting groove and then is separated from the upper mold, and demolding is automatically completed. The structure perfectly replaces a structure adopting a demolding air cylinder for demolding in a comparison file, automatic demolding is achieved, meanwhile, the needed cost of equipment is lower, and the occupied space is small.

Description

Technical Field

[0001] The utility model belongs to the field of sole processing equipment, in particular to a two-color injection machine with automatically separated middle frames. Background Art

[0002] Injection molding of soles is a relatively important part in the process of footwear production. With the improvement of living requirements, people have a higher pursuit for the appearance of shoes. In order to provide more beautiful shoes for people to choose, many types of shoes are made on the soles, and composite soles of different colors and different materials are made. There is a kind of "two-color injection molding machine mold opening method and equipment (CN117445330 A)" that separates the upper mold and the lower mold by a partition and performs injection molding at the same time. After the injection molding is completed, the partition is removed and vulcanization compound is performed to realize the injection molding of two-color soles. After injection molding, the middle frame needs to be separated from the upper mold to take out the sole, but due to the adhesion of the sole, the middle frame cannot be directly separated from the upper mold, so the mold opening cylinder is used to eject the middle frame to separate it from the upper mold, so that the sole is more convenient to take out after injection molding. However, since the upper mold and the middle frame are rotatably connected, the cylinder stroke required for separation is extremely long, the volume is large, and it is difficult to replace the upper mold due to the shielding of the cylinder, which needs to be improved. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a two-color injection molding machine with an automatically separated middle frame.

[0004] The utility model adopts the following technical solutions:

[0005] A two-color injection molding machine with automatic separation of the middle frame comprises a bracket, an upper mold, a middle frame, a lower mold, a flipping mechanism, a lifting mechanism, a locking mechanism and a demoulding mechanism, wherein the upper mold, the middle frame and the lower mold are arranged on the bracket in sequence from top to bottom; the flipping mechanism is arranged on the bracket and connected to the upper mold and drives it to flip upward, and one end of the middle frame is rotatably connected to the upper mold and moves up and down with it; the lifting mechanism is arranged on the bracket and connected to the lower mold to drive it to move in a direction close to or away from the upper mold; the locking mechanism is arranged on the bracket to lock the flipping mechanism; the demoulding mechanism is arranged on the bracket and connected to the other end of the middle frame, comprising a mounting block and a limiting block, the mounting block is arranged on the bracket and located on the side of the middle frame, and the mounting block is concave inwardly formed with a limiting groove extending in the vertical direction on one side close to the middle frame; one end of the limiting block is connected to the middle frame, and the other end extends and can be lifted and lowered in the limiting groove, and the limiting block moves upward with the middle frame to the top of the limiting groove and then separates from the upper mold.

[0006] Preferably, the demolding mechanism also includes a pressure rod and a spring. The pressure rod can be moved up and down and is set in the limit groove. The limit block is located between the top surface of the pressure rod and the top surface of the limit groove. The spring is connected between the bottom surface of the pressure rod and the bottom surface of the limit groove, pushing the pressure rod to move upward and making the limit block always have a tendency to move toward the direction close to the upper mold.

[0007] Preferably, a plurality of positioning holes are formed on the mounting block, and the positioning holes are evenly spaced along the vertical direction. The mounting block is fixed to the bracket through different positioning holes to adjust the height position of the mounting block to adapt to the middle frame of different thicknesses.

[0008] Preferably, the flipping mechanism includes a mounting seat and a flipping cylinder, the mounting seat is rotatably arranged on the bracket, and the upper mold is fixed to the bottom of the mounting seat; one end of the flipping cylinder is fixed to the bracket, and the other end is connected to the mounting seat and drives it to rotate.

[0009] Preferably, the bracket includes a rotating frame that can be flipped and arranged on both sides of the mounting seat, and the mounting block is arranged on the rotating frame; the locking mechanism includes a first card block, a second card block, a locking cylinder and a proximity switch, and the first card block is arranged on both sides of the mounting seat; the second card block is arranged on the rotating frame and is located on the opposite side of the mounting seat, and the bottom surface of the second card block contacts the top surface of the first card block to limit the position of the upper mold; the locking cylinder is connected to the rotating frame to drive it to rotate; the proximity switch is arranged on the rotating frame and is located at the connection between the first card block and the second card block to detect the connection status of the two.

[0010] Preferably, the top surface of the first clamping block is an inclined surface which gradually slopes upward in a direction close to the rotating frame; the bottom surface of the second clamping block is matched with the top surface of the first clamping block and is a section which gradually slopes downward in a direction close to the mounting seat.

[0011] Preferably, it also includes a partition and a transfer mechanism, the partition is arranged between the lower mold and the middle frame; the transfer mechanism is arranged in the bracket and connected to the partition, driving the partition away from or close to the processing station, the transfer mechanism includes a guide rail, a chain assembly and a drive assembly, the guide rail is arranged in the bracket and located on both sides of the partition, and a guide groove for the partition to move is formed in the guide rail; the chain assembly is arranged in the guide groove, and extension rods that can be extended into the guide groove and connected to the chain assembly are formed on both sides of the partition; the drive assembly is arranged on the guide rail and connected to the chain assembly to drive the partition to move.

[0012] Preferably, the lifting mechanism includes a base in contact with the bottom of the lower mold and a hydraulic cylinder arranged at the bottom of the base to drive the base to rise and fall. The top surface of the guide rail is formed with a clearance groove which is connected to the guide groove and can allow the extension rod to move upward. The clearance groove is located on the side close to the lower mold. The base drives the lower mold to move upward and pushes the partition out of the guide groove and fits with the middle frame.

[0013] From the above description of the utility model, it can be seen that compared with the prior art, the beneficial effects of the utility model are as follows: after the injection molding is completed, the flipping mechanism drives the upper mold to flip upward, and at the same time, the middle frame moves upward with the upper mold due to the adhesion of the rubber, and the limit block also moves upward along the limit groove until the limit block supports the top surface of the limit groove. At this time, the upper mold continues to move upward, and the middle frame is limited by the limit block to separate it from the upper mold to complete demoulding. At the same time, by adding a pressure rod and a spring, the middle frame always has a tendency to approach the upper mold in the non-demolding state, and it is difficult to separate from the upper mold, thereby ensuring the structural stability when not demoulding. This structure perfectly replaces the demoulding structure using a demoulding cylinder in the comparative document, realizes automatic demoulding, and at the same time, the equipment required is lower cost and occupies less space, which is convenient for replacement and maintenance of the equipment.

[0014] The mounting block is mounted on the bracket through different positioning holes, so that its height can be adjusted to adapt to molds of different thicknesses, which improves the practicality of the equipment;

[0015] The position of the mounting seat is locked by the locking mechanism to fix the upper mold. The proximity switch can also be used to detect whether the mounting seat has reached the correct position for subsequent injection molding. This can effectively prevent the upper mold from being pushed out of the injection molding station when the lifting mechanism drives the lower mold to move upward, resulting in injection molding failure, thereby improving the stability and safety of the device.

[0016] The partition can be movably arranged between the upper mold and the lower mold for two-color injection molding, and a makeshift groove is formed on the guide rail to facilitate the partition to rise upward with the lower mold, so that the partition can be separated from the guide rail and participate in injection molding. There is no need to adjust the position of the guide rail and the partition according to the size of the mold, which further improves the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the structure of the utility model after the rotating frame is opened;

[0019] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0020] Figure 4 The structure of the utility model is shown in FIG. Figure 2 ;

[0021] Figure 5 for Figure 4 A partial enlarged view of point B in the middle;

[0022] Figure 6 The structure of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 7 for Figure 6 A partial enlarged view of point C in the middle;

[0024] In the figure: 1- bracket; 11- rotating frame; 2- mold; 21- upper mold; 22- middle frame; 23- lower mold; 3- partition; 31- extension rod; 4- transfer mechanism; 41- guide rail; 42- chain assembly; 43- driving assembly; 44- guide groove; 45- yield groove; 5- flip mechanism; 51- mounting seat; 52- flip cylinder; 6- lifting mechanism; 61- base; 62- hydraulic cylinder; 7- locking mechanism; 71- first clamping block; 72- second clamping block; 73- locking cylinder; 74- proximity switch; 8- demoulding mechanism; 81- mounting block; 82- limit block; 83- pressure rod; 84- spring; 85- limit groove; 86- positioning hole. DETAILED DESCRIPTION

[0025] The present invention is further described below through specific implementation methods.

[0026] Reference Figures 1 to 7 As shown, a two-color injection molding machine with automatic middle frame separation includes a bracket 1, a mold 2, a partition 3, a transfer mechanism 4, a flip mechanism 5, a lifting mechanism 6, a locking mechanism 7 and a demoulding mechanism 8.

[0027] Two opposite rotating frames 11 are arranged on the support 1 .

[0028] The mold 2 includes an upper mold 21 , a middle frame 22 and a lower mold 23 , which are located between the two rotating frames 11 and are sequentially arranged on the bracket 1 from top to bottom.

[0029] The partition plate 3 is disposed between the lower mold 23 and the middle frame 22 .

[0030] The transfer mechanism 4 is arranged in the bracket 1 and connected with the partition 3, driving the partition 3 away from or close to the processing station. The transfer mechanism 4 includes a guide rail 41, a chain assembly 42 and a driving assembly 43. The guide rail 41 is arranged in the bracket 1 and is located on both sides of the partition 3. A guide groove 44 for the partition 3 to move is formed in the guide rail 41; the chain assembly 42 is arranged in the guide groove 44, and extension rods 31 that can be extended into the guide groove 44 and connected to the chain assembly 42 are formed on both sides of the partition 3; the driving assembly 43 is arranged on the guide rail 41 and connected with the chain assembly 42 to drive the partition 3 to move, and the upper mold 21 and the lower mold 23 are isolated by the partition 3. After a single injection molding is performed, the partition 3 is removed and then the two soles are vulcanized and bonded to ensure that the boundaries of the soles after the two-color injection molding are clear.

[0031] The flip mechanism 5 is arranged on the bracket 1 and connected to the upper mold 21 to drive it to flip upward, and one end of the middle frame 22 is rotatably connected to the upper mold 21 and moves up and down with it. The flip mechanism 5 includes a mounting seat 51 and a flip cylinder 52. The mounting seat 51 is rotatably arranged between the two rotating frames 11, and the upper mold 21 is fixed at the bottom of the mounting seat 51; one end of the flip cylinder 52 is fixed on the bracket 1, and the other end is connected to the mounting seat 51 and drives it to rotate.

[0032] The lifting mechanism 6 is arranged on the bracket 1 and connected to the lower mold 23 to drive it to move in the direction close to or away from the upper mold 21. The lifting mechanism 6 includes a base 61 in contact with the bottom of the lower mold 23 and a hydraulic cylinder 62 arranged at the bottom of the base 61 to drive the base 61 to rise and fall. The hydraulic cylinder 62 pushes the lower mold 23 to move upward and overlap with the middle frame 22 for injection molding. Specifically, the top surface of the guide rail 41 is formed with a clearance groove 45 that is connected to the guide groove 44 and can be used for the extension rod 31 to move upward. The clearance groove 45 is located on the side close to the lower mold 23. The base 61 drives the lower mold 23 to move upward and pushes the partition 3 to disengage from the guide groove 44 and fit with the middle frame 22. The partition 3 can be separated from the guide rail 41 to participate in injection molding, and there is no need to adjust the position of the guide rail 41 and the partition 3 according to the size of the mold 2, which further improves the practicality of the equipment.

[0033] The locking mechanism 7 is arranged on the bracket 1 to lock the flip mechanism 5. The locking mechanism 7 includes a first block 71, a second block 72, a locking cylinder 73 and a proximity switch 74. The first block 71 is arranged on both sides of the mounting seat 51; the second block 72 is arranged on the rotating frame 11 on the opposite surface of the mounting seat 51, and the bottom surface of the second block 72 contacts the top surface of the first block 71 to limit the position of the upper mold 21; the locking cylinder 73 is connected to the rotating frame 11 to drive it to rotate; the proximity switch 74 is arranged on the rotating frame 11 and is located at the connection between the first block 71 and the second block 72 to detect the connection state of the two. The top surface of the first block 71 is an inclined surface that gradually tilts upward in the direction close to the rotating frame 11; the bottom surface of the second block 72 is adapted to the top surface of the first block 71, and is a section that gradually tilts downward in the direction close to the mounting seat 51. The position of the mounting seat 51 is locked by the locking mechanism 7 to fix the upper mold 21, and the proximity switch 74 can also be used to detect whether the mounting seat 51 has reached the correct position to facilitate subsequent injection molding. This can effectively prevent the lifting mechanism 6 from driving the lower mold 23 to move upward and pushing the upper mold 21 out of the injection molding station, resulting in injection molding failure, thereby improving the stability and safety of the device.

[0034] The demoulding mechanism 8 is arranged on the bracket 1 and connected to the other end of the middle frame 22, and includes a mounting block 81, a limit block 82, a pressure rod 83 and a spring 84. The mounting block 81 is arranged on the rotating frame 11 and is located on the side of the middle frame 22. The mounting block 81 is concave inwardly formed with a limit groove 85 extending in the vertical direction on one side close to the middle frame 22; one end of the limit block 82 is arranged on the middle frame 22, and the other end extends into the limit groove 85; the pressure rod 83 can be moved up and down and arranged in the limit groove 85, and the limit block 82 is located between the top surface of the pressure rod 83 and the top surface of the limit groove 85; the spring 84 is connected between the bottom surface of the pressure rod 83 and the bottom surface of the limit groove 85, pushing the pressure rod 83 to move upward and making the limit block 82 have a tendency to always move toward the direction close to the upper mold 21. After the injection molding is completed, the flipping mechanism 5 drives the upper mold 21 to flip upward. At the same time, the middle frame 22 moves upward with the upper mold 21 due to the adhesion of the rubber, and the limit block 82 also moves upward along the limit groove 85 until the limit block 82 supports the top surface of the limit groove 85. At this time, the upper mold 21 continues to move upward, and the middle frame 22 is limited by the limit block 82 to separate it from the upper mold 21 to complete the demoulding. At the same time, by adding the pressure rod 83 and the spring 84, the middle frame 22 always has a tendency to approach the upper mold 21 in the non-demolding state, and it is difficult to separate from the upper mold 21, thereby ensuring the structural stability when not demoulding. This structure perfectly replaces the demoulding structure using a demoulding cylinder in the comparative document, realizes automatic demoulding, and at the same time requires lower equipment costs and occupies less space, which is convenient for replacement and maintenance of the equipment. Specifically, the mounting block 81 is formed with a plurality of positioning holes 86, which are evenly spaced in the vertical direction. The mounting block 81 is mounted on the bracket 1 through different positioning holes 86, so that the height can be adjusted to adapt to molds 2 of different thicknesses, thereby improving the practicability of the device. Furthermore, when in a non-working state, the distance between the top surface of the limit groove 85 and the top surface of the pressure rod 83 is greater than the height of the limit block 82, and the spring 84 does not need to always clamp the limit block 82, thereby improving the service life of the spring 84.

[0035] During injection molding, the rotating frame 11 is driven to rotate by the locking cylinder 73, and the flip mechanism 5 drives the upper mold 21 to a position lower than the specified position. After the rotating frame 11 is reset, the upper mold 21 is driven to move upward to make the first block 71 contact the second block 72. At this time, the proximity switch 74 is used to detect whether the mounting seat 51 is located at the specified position. After reaching the specified position, the locking cylinder 73 is locked to fix the mounting seat 51 and prepare to start injection molding. The injection process is a common two-color sole injection molding technology, and its steps are not further described here. After the injection molding is completed, the lifting mechanism 6 drives the lower mold 23 to reset downward, and the flip mechanism 5 drives the upper mold 21 to move downward and disengage from the locked position. At this time, the limit block 82 moves downward with the upper mold 21, and the pressure rod 83 is compressed, and the spring 84 is compressed. After the rotating frame 11 rotates to a distance between the two that is sufficient for the mounting seat 51 to pass through, the flipping mechanism 5 drives the upper mold 21 to move upward, and the middle frame 22 moves upward with the upper mold 21 due to the adhesion of the rubber, and the limit block 82 also moves upward along the limit groove 85 until the limit block 82 supports the top surface of the limit groove 85. At this time, the upper mold 21 continues to move upward, and the middle frame 22 is limited by the limit block 82 to separate it from the upper mold 21 to complete the demoulding. At the same time, by adding the pressure rod 83 and the spring 84, the middle frame 22 always has a tendency to approach the upper mold 21 in the non-demolding state, and is difficult to separate from the upper mold 21, thereby ensuring the structural stability when not demoulding. This structure perfectly replaces the structure of demoulding with a demoulding cylinder in the comparative document, realizes automatic demoulding, and at the same time requires lower equipment costs and occupies less space, which is convenient for replacement and maintenance of the equipment.

[0036] The above description is only a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of implementation of the present utility model. That is, equivalent changes and modifications made according to the scope of the patent application of the present utility model and the contents of the specification should still fall within the scope covered by the patent of the present utility model.

Claims

1. A two-color injection molding machine with automatic middle frame separation, characterized in that: It includes a bracket, an upper mold, a middle frame, a lower mold, a flipping mechanism, a lifting mechanism, a locking mechanism and a demoulding mechanism. The upper mold, the middle frame and the lower mold are arranged on the bracket in sequence from top to bottom; the flipping mechanism is arranged on the bracket and connected to the upper mold and drives it to flip upward, and one end of the middle frame is rotatably connected to the upper mold and moves up and down with it; the lifting mechanism is arranged on the bracket and connected to the lower mold to drive it to move in the direction close to or away from the upper mold; the locking mechanism is arranged on the bracket to lock the flipping mechanism; the demoulding mechanism is arranged on the bracket and connected to the other end of the middle frame, including a mounting block and a limit block, the mounting block is arranged on the bracket and located on the side of the middle frame, and the mounting block is close to the middle frame. The side is concave inwardly formed with a limit groove extending in the vertical direction; one end of the limit block is connected to the middle frame, and the other end is extended and can be lifted and lowered in the limit groove, and the limit block moves upward with the middle frame to the top of the limit groove and is separated from the upper mold.

2. A two-color injection molding machine with automatic middle frame separation according to claim 1, characterized in that: The demoulding mechanism also includes a pressure rod and a spring. The pressure rod can be moved up and down and is set in the limit groove. The limit block is located between the top surface of the pressure rod and the top surface of the limit groove. The spring is connected between the bottom surface of the pressure rod and the bottom surface of the limit groove, pushing the pressure rod to move upward and making the limit block have a tendency to always move towards the direction close to the upper mold.

3. A two-color injection molding machine with automatic middle frame separation according to claim 2, characterized in that: The mounting block is formed with a plurality of positioning holes, which are evenly spaced in the vertical direction. The mounting block is fixed to the bracket through different positioning holes to adjust the height position of the mounting block to adapt to the middle frame of different thicknesses.

4. A two-color injection molding machine with automatic middle frame separation according to claim 2, characterized in that: The flip mechanism includes a mounting seat and a flip cylinder. The mounting seat is rotatably arranged on the bracket, and the upper mold is fixed to the bottom of the mounting seat. One end of the flip cylinder is fixed to the bracket, and the other end is connected to the mounting seat and drives it to rotate.

5. A two-color injection molding machine with automatic middle frame separation according to claim 4, characterized in that: The bracket includes a rotating frame that can be flipped and arranged on both sides of the mounting seat, and the mounting block is arranged on the rotating frame; the locking mechanism includes a first clamping block, a second clamping block, a locking cylinder and a proximity switch, the first clamping block is arranged on both sides of the mounting seat; the second clamping block is arranged on the rotating frame on the opposite side of the mounting seat, and the bottom surface of the second clamping block contacts the top surface of the first clamping block to limit the position of the upper mold; the locking cylinder is connected to the rotating frame to drive it to rotate; the proximity switch is arranged on the rotating frame and is located at the connection between the first clamping block and the second clamping block to detect the connection status of the two.

6. A two-color injection molding machine with automatic middle frame separation according to claim 5, characterized in that: The top surface of the first clamping block is an inclined surface that gradually slopes upward along the direction close to the rotating frame; the bottom surface of the second clamping block is matched with the top surface of the first clamping block and is a section surface that gradually slopes downward along the direction close to the mounting seat.

7. The two-color injection molding machine with automatic middle frame separation according to claim 3, characterized in that: It also includes a partition and a transfer mechanism, the partition is arranged between the lower mold and the middle frame; the transfer mechanism is arranged in the bracket and connected to the partition, driving the partition away from or close to the processing station, the transfer mechanism includes a guide rail, a chain assembly and a drive assembly, the guide rail is arranged in the bracket and located on both sides of the partition, and a guide groove for the partition to move is formed in the guide rail; the chain assembly is arranged in the guide groove, and extension rods that can be extended into the guide groove and connected to the chain assembly are formed on both sides of the partition; the drive assembly is arranged on the guide rail and connected to the chain assembly to drive the partition to move.

8. A two-color injection molding machine with automatic middle frame separation according to claim 7, characterized in that: The lifting mechanism includes a base in contact with the bottom of the lower mold and a hydraulic cylinder arranged at the bottom of the base to drive the base to rise and fall. The top surface of the guide rail is formed with a clearance groove which is connected to the guide groove and can allow the extension rod to move upward. The clearance groove is located on the side close to the lower mold. The base drives the lower mold to move upward and pushes the partition out of the guide groove and fits with the middle frame.

Images