A die-cutting overflow removal structure

Abstract

The utility model provides an in-mold cutting overflow removal structure, which comprises a knife seat (1), a cutter (2) fixedly mounted on the knife seat (1), and an insert (3) movably mounted on the knife seat (1), wherein the movable direction of the insert (3) is parallel to the cutter (2), and a movable structure (4) is arranged at the bottom of the insert (3); the movable structure (4) comprises a movable part (41), a cavity (11) is arranged at the bottom of the knife seat (1), a positive bevel that contacts the movable part (41) is arranged at the bottom of the insert (3), and a reverse bevel that contacts the movable part (41) is arranged on one side of the cavity (11), and the movable part (41) is arranged in the cavity (11). The utility model can completely cut off the water outlet when the injection molding time is relatively long, the injection molding pressure is relatively large, or the material is relatively hard.

Description

Technical Field

[0001] The utility model relates to the technical field of in-die cutting, in particular to an in-die cutting overflow removal structure. Background Art

[0002] In-mold cutting technology is a mold injection automation technology that uses a cutting knife to shear or squeeze out the gate before the plastic mold is opened, thereby achieving part-material separation after the plastic mold is opened.

[0003] When the injection molded product is thick, high in density, hard in material, has a cooling block, a long holding time, and a thicker gate thickness, the product may not be cut smoothly, or may turn white. In this case, the existing in-mold cutter structure, when faced with such a situation where the product is not fully hot-cut, will often cause the cutter to not be cut smoothly, or may turn white.

[0004] In view of this, it is necessary to provide an in-mold cutting overflow removal structure to solve the shortcomings of the prior art. Utility Model Content

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide an in-mold overflow removal structure that can completely cut off the water outlet and make a smooth cut when the injection molded product is thick, has high density, hard material, cooling block, long pressure holding time, and thick water outlet.

[0006] In order to solve the above technical problems, the utility model provides an in-mold cutting overflow removal structure, which includes a knife seat, a cutting knife fixedly mounted on the knife seat, and an insert movably mounted on the knife seat, wherein the movable direction of the insert is parallel to the cutting knife, and a movable structure is provided at the bottom of the insert.

[0007] A further improvement of the utility model is that the movable structure includes a movable part, a cavity is provided at the bottom of the knife seat, a positive bevel is provided at the bottom of the insert for abutting against the movable part, a reverse bevel is provided on one side of the cavity for abutting against the movable part, and the movable part is placed in the cavity.

[0008] A further improvement of the utility model is that the movable part is cylindrical.

[0009] A further improvement of the utility model is that a hanging platform is provided at the bottom of the insert.

[0010] A further improvement of the utility model is that the top of the insert is communicated with the flow channel or material bag on the mold core.

[0011] A further improvement of the utility model is that the insert is connected to the mold core by movable sealing glue.

[0012] A further improvement of the utility model is that a space is provided between the insert and the cutter.

[0013] A further improvement of the utility model is that the insert is movably sealed with glue to the cutter.

[0014] A further improvement of the utility model is that the movable part conflicts with the mold core or the mold base.

[0015] A further improvement of the utility model is that a spring is provided between the knife seat and the mold core.

[0016] Compared with the prior art, the utility model uses a material bag that is squeezed toward the top surface of the insert under the action of the cutting force of the cutter. The insert moves in the opposite direction due to the cutting pressure of the cutter, and the positive bevel squeezes the movable part to move inward. The distance the insert moves in the opposite direction forms an overflow space. When the cutter cuts the sprue, the remaining material in the material bag is squeezed into the overflow space, so that the cutter can completely cut off the sprue. Conversely, the knife seat translates with the reverse bevel to drive the movable part to translate along the plane of the rear mold base, and the movable part drives the insert to translate through the positive bevel to fill the overflow space. The utility model can completely cut off the sprue and has a smooth in-mold overflow removal structure when the injection molded product is thick, high in density, hard in material, with a cooling block, a long holding time, and a thick sprue thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Is a schematic diagram of a three-dimensional structure of an embodiment of the utility model;

[0018] Figure 2 It is a schematic cross-sectional structure diagram of a mold injection molding state of an embodiment of the present utility model;

[0019] Figure 3 Is a schematic cross-sectional structure diagram of a water cut state of an embodiment of the present utility model;

[0020] Figure 4 It is an enlarged schematic diagram of A in the first embodiment of the present utility model;

[0021] Figure 5 It is an enlarged schematic diagram of B of the first embodiment of the utility model;

[0022] Figure 6 It is an enlarged schematic diagram of C of the first embodiment of the utility model;

[0023] Figure 7 D is an enlarged schematic diagram of an implementation mode of the utility model;

[0024] Figure 8 Is a schematic diagram of the three-dimensional structure of the utility model implementation mode five;

[0025] Fig. 9 Is a schematic cross-sectional structure diagram of the mold injection state of the fifth embodiment of the utility model;

[0026] Fig.10 Is a schematic cross-sectional structure diagram of the water cut state of the utility model implementation mode five;

[0027] Fig.11 Is a schematic diagram of the three-dimensional structure of the utility model implementation six;

[0028] Fig.12 It is a schematic diagram of the side cross-sectional structure of the sixth embodiment of the utility model in the mold injection molding state;

[0029] Fig.13 Is a schematic diagram of the side cross-sectional structure of the water cut state of the utility model implementation mode six;

[0030] Fig.14 It is a schematic diagram of the front cross-sectional structure of the sixth embodiment of the present utility model in the mold injection molding state;

[0031] Fig.15 It is a front cross-sectional structural diagram of the water cutting state of the sixth embodiment of the utility model.

[0032] The names of the components in the figure are as follows:

[0033] 1—Tool holder;

[0034] 11—cavity;

[0035] 12—reverse bevel;

[0036] 2—cutter;

[0037] 3—Inlay;

[0038] 31—positive hypotenuse;

[0039] 4—Activity structure;

[0040] 41—movable parts;

[0041] 5—rear mold core;

[0042] 51—flow channel;

[0043] 52—Material package;

[0044] 6—Mounting screws;

[0045] 7—rod;

[0046] 8—Ejector cylinder;

[0047] 9—Back mold base. DETAILED DESCRIPTION

[0048] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0049] Implementation Method 1

[0050] like Figure 1-Figure 7 As shown, an in-mold cutting overflow removal structure includes a tool holder 1, two cutters 2, and two inserts 3. The two cutters 2 are fixedly mounted on the tool holder 1, and the two inserts 3 are movably mounted on the tool holder 1. The movable direction of the inserts 3 is parallel to the cutters 2, and a movable structure 4 is provided at the bottom of the inserts 3.

[0051] like Figure 1-Figure 7 As shown, the bottom of the tool holder 1 is provided with two cavities 11, the tool holder 1 is provided with two through holes, two inserts 3 are movably installed in the two through holes on the tool holder 1, and the cavities 11 are communicated with the through holes.

[0052] like Figure 1-Figure 7 As shown, the knife holder 1 is movably mounted at the bottom of the rear mold core 5, the rear mold core 5 is provided with a flow channel 51 and two material bags 52 connected to the flow channel 51, the insert 3 movably passes through the rear mold core 5 and is movably sealed and connected to the material bag 52 and the cutter 2. The cutter 2 is provided with a blade, and the cutter 2 and the insert 3 are close to each other without a gap.

[0053] like Figure 1-Figure 7 As shown, the movable structure 4 includes a movable part 41, a positive bevel 31 is provided at the bottom of the insert 3 to abut against the movable part 41, a reverse bevel 12 is provided on one side of the cavity 11 to abut against the movable part 41, and the movable part 41 is placed in the cavity 11. The movable part 41 abuts against the rear mold base 9, and the movable part 41 rolls parallel to the plane of the rear mold base 9. The movable part 41 is cylindrical. A hanging platform is provided at the bottom of the insert 3.

[0054] like Figure 1-Figure 7 As shown, three springs are arranged between the knife seat 1 and the rear mold core 5. A mounting screw 6 is arranged on the side of the knife seat 1, and two ejector rods 7 are arranged at the bottom of the knife seat 1, and an ejector oil cylinder 8 is arranged below the ejector rods 7.

[0055] The utility model is also provided with a control system, and the control system is used to control the operation of the ejection oil cylinder 8.

[0056] Working principle of implementation method 1: Figure 2-7 As shown,

[0057] In the injection molding water-entering state, under the elastic force of the spring, there is a distance between the knife seat 1 and the rear mold core 5, the knife seat 1 contacts the rear mold base 9, and the movable part 41 is in a balanced and stable state under the joint action of the positive bevel 31, the reverse bevel 12, and the plane of the rear mold base 9. The hanging platform of the insert 3 contacts the knife seat 1, the movable part 41 contacts the positive bevel 31, and the top surface of the insert 3 is flush with the bottom surface of the material bag 52. In the mold opening state, the cutter 2 retreats under the action of the spring on the knife seat 1, and the knife seat 1 retreats through the reverse bevel guide through the movable part 41 to push the movable surface of the insert 3, lift the insert 3 and play a limiting role in preventing the insert from moving downward.

[0058] In the hot cutting state, the ejection cylinder 8 works to push the push rod 7 to move, and the push rod 7 pushes the knife holder 1 to move. The knife holder 1 moves with the cutter 2, and the moving cutter 2 cuts the water outlet. A gap is formed between the knife holder 1 and the rear mold base 9, and the gap is equal to the distance the knife holder 1 moves. At the same time, the material bag 52 is squeezed toward the top surface of the insert 3 under the action of the cutting force of the cutter 2. The insert 3 moves in the opposite direction under the cutting pressure of the cutter 2, so that the positive bevel 31 squeezes the movable part 41 to move inward, and the distance that the insert 3 moves in the opposite direction forms an overflow space. When the cutter 2 cuts the water outlet, the remaining material in the material bag 52 is squeezed into the overflow space, so that the cutter 2 can completely cut off the water outlet. Under the joint action of the positive bevel 31, the reverse bevel 12, and the plane of the rear mold base 9, the movable part 41 always moves parallel to the plane of the rear mold base 9. When the insert 3 is cut off by the cutter 2, the remaining material in the material bag 52 moves the insert 3 downward, thereby generating a blank space for overflow, solving the problem of being difficult to cut off.

[0059] Implementation Method 2

[0060] The second embodiment is basically the same as the first embodiment, except that a space is provided between the cutter 2 and the insert 3. The working principle of the second embodiment is the same as that of the first embodiment, and will not be described in detail here. See the working principle of the first embodiment.

[0061] Implementation Method 3

[0062] The third embodiment is basically the same as the first embodiment, except that the movable member 41 is in conflict with the rear mold 2. The working principle of the third embodiment is the same as that of the first embodiment, and will not be described in detail here. See the working principle of the first embodiment.

[0063] Implementation Method 4

[0064] The fourth embodiment is basically the same as the first embodiment, except that the rear mold core 5 is provided with a flow channel 51, but no material bag is provided. The fourth embodiment has the same working principle as the first embodiment, which will not be described in detail here, see the working principle of the first embodiment.

[0065] Implementation Method 5

[0066] like Figure 8-10 As shown, the fifth embodiment is basically the same as the first embodiment, except that the number of cutters 2, inserts 3, movable parts 41, cavities, through holes, springs, ejector rods 7, and ejector oil cylinders 8 is different. In the fifth embodiment, the number of cutters 2, inserts 3, movable parts 41, cavities, through holes, ejector rods 7, and ejector oil cylinders 8 is 1, while the number of springs is 2. The positions where the ejector rod 7 and the insert 3 collide are different. The fifth embodiment conflicts with the middle position of the knife holder 1, while the first embodiment conflicts with the two end positions of the knife holder 1. The working principle of the fifth embodiment is the same as that of the first embodiment, and will not be described in detail here. See the working principle of the first embodiment.

[0067] Implementation Method 6

[0068] like Figure 11-15 As shown, the sixth embodiment is basically the same as the first embodiment, except that the number of cutters 2, movable parts 41, cavities, through holes, springs, ejector rods 7, and ejector oil cylinders 8 is different, and the structure of the insert 3 is changed. The number of cutters 2 in the sixth embodiment is 1, the number of movable parts 41, cavities, and through holes is 3, the number of ejector rods 7 and ejector oil cylinders 8 is 4, and the number of springs is 5. The number of inserts 3 is 3 groups, and the inserts 3 include a sealing insert in the upper part and a movable insert in the lower part. The number of sealing inserts is 2, and the number of movable inserts is 1. The two sealing inserts are separated and fixedly connected to the movable inserts respectively. The movable insert is movably connected to the knife seat 1, and the bottom of the movable insert is provided with a positive bevel, which conflicts with the movable part 41.

[0069] The working principle of the sixth embodiment is the same as that of the first embodiment, and will not be described in detail here. See the working principle of the first embodiment.

[0070] The utility model has the following description points:

[0071] 1. The movable part 41 is driven by the reverse slope of the tool holder 1 to move the insert 3. The shape and size of the movable part 41 are not limited. It can be cylindrical, hexagonal, octagonal or quadrilateral, etc. The size is determined according to needs.

[0072] 2. The reaction force generated by the upward movement of the cutter 2 to cut off the water outlet pushes the insert 3 back: the shape, size and number of the insert 3 are not limited. The insert 3 can be square or round, etc., and the size and number are determined according to needs.

[0073] 3. The insert 3 and the tool holder 1 can achieve this function by assembling and stacking a single piece or multiple pieces.

[0074] 4. The utility model can be applied in various cutting modes of in-mold hot cutting, such as: side entry into water, overlapping entry into water, annular entry into water, slider entry into water, diving, bull horn, etc.

[0075] The beneficial effect of the utility model is compared with the prior art. The material bag 52 is squeezed toward the top surface of the insert 3 under the action of the cutting force of the cutter 2. The insert 3 moves in the opposite direction due to the cutting pressure of the cutter 2. The positive bevel squeezes the movable part 41 to move inward. The distance that the insert 3 moves in the opposite direction forms an overflow space. When the cutter cuts the water outlet, the remaining material in the material bag is squeezed into the overflow space, so that the cutter can completely cut off the water outlet. On the contrary, the knife seat 1 translates with the reverse bevel to drive the movable part 41 to translate along the plane of the rear mold base, and the movable part drives the insert 3 to translate through the positive bevel to fill the overflow space. The utility model can completely cut off the water outlet and has a smooth in-mold overflow removal structure when the injection molded product is thick, high in density, hard in material, cooling block, long in pressure holding time, and the water outlet is thick.

[0076] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A die-cutting flash removal structure, characterized in that: It comprises a knife seat (1), a cutting knife (2) fixedly mounted on the knife seat (1), and an insert (3) movably mounted on the knife seat (1), wherein the movable direction of the insert (3) is parallel to the cutting knife (2), and a movable structure (4) is provided at the bottom of the insert (3).

2. The in-mold flash removal structure according to claim 1, characterized in that: The movable structure (4) comprises a movable part (41), a cavity (11) is provided at the bottom of the knife seat (1), a positive bevel is provided at the bottom of the insert (3) for contacting the movable part (41), a reverse bevel is provided on one side of the cavity (11) for contacting the movable part (41), and the movable part (41) is placed in the cavity (11).

3. The in-mold flash removal structure according to claim 2, characterized in that: The movable part (41) is cylindrical.

4. The in-mold flash removal structure according to claim 2, characterized in that: A hanging platform is provided at the bottom of the insert (3).

5. The in-mold flash removal structure according to claim 1, characterized in that: The top of the insert (3) is communicated with the flow channel or material bag on the mold core.

6. The in-mold flash removal structure according to claim 1, characterized in that: The insert (3) is connected to the mold core by movable sealing glue.

7. The in-mold flash removal structure according to claim 1, characterized in that: A gap is provided between the insert (3) and the cutter (2).

8. The in-mold flash removal structure according to claim 1, characterized in that: The insert (3) is movably sealed with glue and connected to the cutter (2).

9. The in-mold flash removal structure according to claim 2, characterized in that: The movable part (41) is in conflict with the mold core or the mold base.

10. The in-mold flash removal structure according to claim 1, characterized in that: A spring is provided between the knife seat (1) and the mold core.

Images