Tool for semi-automatically cutting off pouring gate

Abstract

The tool comprises a base, a product positioning plate, an injection molding product, a positioning and clamping mechanism and an automatic cutting assembly, the base comprises a bottom plate and side plates, the side plates are symmetrically installed on the two sides of the bottom plate, the automatic cutting assembly is arranged in the middle of the interior of the bottom plate, the product positioning plate can correspondingly cover the two side plates, and the product positioning plate can correspondingly cover the two side plates. The product positioning plate is parallel to the bottom plate, a cutting window opposite to the automatic cutting assembly is arranged in the middle of the product positioning plate, product containing areas are arranged on the two sides of the cutting window, the two sheet-shaped injection molding products are connected through a sprue material, the two injection molding products are correspondingly placed in the product containing areas on the two sides, and the sprue material is aligned with the cutting window. The positioning and clamping mechanism abuts against the two injection molding products from the upper portion, and the automatic cutting assembly penetrates through the cutting window to conduct automatic stamping and cutting on the connecting points of the sprue materials and the injection molding products. The tool is low in manufacturing cost, easy to operate, smooth in notch and capable of preventing products from being damaged by stress concentration.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding technology, specifically relating to a semi-automatic tooling for cutting off gates. Background Technology

[0002] Plastic panel boxes are generally manufactured using injection molding. The gate is the channel through which molten plastic enters the mold cavity during injection molding. It needs to be removed after molding; otherwise, it will affect the product's appearance and function. Common gate removal methods include manual removal, mechanical removal, hot cutting, and laser cutting. Manual removal is simple and low-cost, but inefficient, especially in mass production, and can easily leave uneven cuts that may damage the product. Hot cutting and laser cutting are more expensive, require complex equipment maintenance, and involve large initial investments, making them unsuitable for gate removal in ordinary injection molded parts. Therefore, most companies use mechanical removal in production. The injection molded parts that make up the box body are usually thin and wide layered injection molded parts. To ensure uniform injection, they generally have multiple gates. If the force applied during removal is uneven or the multi-layered injection molded parts are not securely fixed, local stress concentration can easily occur in the injection molded parts, causing deformation or cracks during cutting. Utility Model Content

[0003] To address the aforementioned problems and technical requirements, this utility model provides a semi-automatic gate cutting fixture. This fixture can fix and automatically cut the gate of layered injection molded parts. The mold has low manufacturing cost, is easy to operate, produces a smooth cut, and avoids stress concentration damage to the product.

[0004] The technical solution of this utility model is as follows: A semi-automatic tooling for cutting gates includes a base, a product positioning plate, injection molded products, a positioning and clamping mechanism, and an automatic cutting component. The base includes a bottom plate and side plates, with the side plates symmetrically installed on both sides of the bottom plate. An automatic cutting component is provided in the center of the bottom plate. The product positioning plate can cover the two side plates accordingly. The product positioning plate and the bottom plate are parallel. A cutting window is provided in the center of the product positioning plate, which is opposite to the automatic cutting component. The two sides of the cutting window are product placement areas. Two sheet-like injection molded products are connected by gate material. The two injection molded products are placed in the product placement areas on both sides, with the gate material aligned with the cutting window. The positioning and clamping mechanism clamps the two injection molded products from above. The automatic cutting component passes through the cutting window and automatically punches and cuts the connection point between the gate material and the injection molded products.

[0005] Furthermore, there are two connection points between the sprue and the injection molded products on both sides, and a fixed baffle is provided in the middle of the cutting window, which is supported in the middle of the sprue.

[0006] Furthermore, the positioning and clamping mechanism includes a pressure plate, a hinge block, a fastening block, and wing screws. The hinge block and fastening block are respectively located at both ends of the cutting window and are fixedly connected to the product positioning plate. The pressure plate is positioned along the direction of the cutting window. One end of the pressure plate is hinged to the hinge block, and pressure parts extend vertically from both sides of the pressure plate. The pressure plate rotates around the hinge block and presses down, with the pressure parts on both sides pressing against the injection-molded products on both sides to clamp them. The front end of the pressure plate has a groove, and the fastening block is U-shaped. When the pressure plate rotates downward to its lowest position, the front end of the pressure plate rests on the fastening block, and the groove is opposite to the U-shaped groove of the fastening block. The bottom of the U-shaped groove of the fastening block has a screw hole, and the wing screw can pass vertically through the groove and connect to the screw hole to lock the pressure plate and the fastening block. The head of the wing screw is blocked on the pressure plate. When the pressure plate rotates downward to clamp the injection-molded product, tightening it with wing screws can further fix the pressure material, facilitating the next cutting operation.

[0007] Furthermore, each side of the pressure plate is provided with at least two pressing sections, each including a support bar, a vertical pressure rod, and a flexible pressing foot. The support bar and the pressure plate are integrally molded parts. The end of the support bar is vertically connected to the vertical pressure rod, and the bottom of the vertical pressure rod is provided with a flexible pressing foot. The flexible pressing foot is cylindrical and made of rubber. The pressing section drives the flexible pressing foot to clamp the injection molded product from a vertical direction, and the flexible pressing foot can prevent the product from being damaged.

[0008] Furthermore, the product placement area is provided with multiple limiting protrusions, which can engage with the injection-molded product placed therein to position the product. The limiting protrusions prevent the injection-molded product from sliding on the plane and provide a horizontal fixing effect.

[0009] Furthermore, the automatic cutting assembly includes a cylinder, a slide rail, a piston rod, a cutter head base, and a cutting head. A set of slide rails is provided on the base plate, and the cylinder is positioned between the slide rails. The front end of the cylinder is connected to a piston rod parallel to the slide rails. Multiple cutter head bases are connected to the piston rod, and the bottom of each cutter head base is slidably connected to the slide rail. A cutting head is fixedly connected to each cutter head base. Each cutting head corresponds one-to-one with the connection point between the sprue and the injection-molded product. The cutting head extends vertically into the cutting window, and its front side forms the cutting edge. The cylinder drives all cutting heads forward, simultaneously cutting the connection point between the sprue and the injection-molded product. Because the cutting heads correspond one-to-one with the connection points, during cutting, a single cylinder action drives the piston rod and all the cutting heads resting on the rod to cut off the corresponding sprue connection point. This not only results in fast and efficient cutting but also prevents stress concentration by distributing the pressure across multiple connection points, avoiding stress concentration that could tear or damage the injection-molded product.

[0010] The beneficial effects of this utility model are as follows: This tooling can quickly and accurately cut off the gate material in one go, featuring accurate positioning, uniform cutting force, and fast cutting speed. The product placement area set on the product positioning plate can accurately position the injection molded product, and through the interlocking cooperation with the limiting protrusion, it can prevent the injection molded product from slipping in the product placement area. The pressing parts set on both sides of the pressure plate can press on the injection molded product, pressing it tightly to keep it stable during cutting, preventing skewed cuts, and making the cut more even. Since the injection molded product is a thin and long layered structure, two or more connection points are set between the gate material and the injection molded product. This ensures uniform thickness during injection. The automatic cutting component at the bottom is equipped with cutting heads that correspond one-to-one with the connection points. During the cutting operation, the cylinder only needs to run once, and all cutting heads cut off the corresponding connection points simultaneously. This ensures that the cutting stress is evenly distributed, avoiding tearing damage to the injection molded product caused by uneven cutting force and preventing cracking damage. Attached Figure Description

[0011] Figure 1 This is an assembly structure diagram of the tooling for semi-automatic gate cutting according to the present invention;

[0012] Figure 2 This is an exploded view of the tooling for semi-automatic gate cutting according to the present invention;

[0013] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0014] Figure 4 This is a top view of the tooling for semi-automatic gate cutting according to this utility model;

[0015] Figure 5 for Figure 4 Enlarged structural diagram at point B;

[0016] The components in the diagram are labeled as follows: base 1, bottom plate 11, side plate 12, product positioning plate 2, cutting window 21, product placement area 22, limiting protrusion 221, fixing baffle 23, injection molded product 3, gate material 4, connection point 41, positioning and clamping mechanism 5, pressure plate 51, groove 511, pressure part 52, support bar 521, vertical pressure bar 522, flexible pressure foot 523, hinge block 53, fastening block 54, wing screw 55, automatic cutting assembly 6, cylinder 61, slide rail 62, piston rod 63, knife holder base 64, cutting head 65, and blade 651. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1-5The present invention discloses a semi-automatic gate cutting fixture, comprising a base 1, a product positioning plate 2, injection molded products 3, a positioning and clamping mechanism 5, and an automatic cutting assembly 6. The base 1 includes a bottom plate 11 and side plates 12, with the side plates 12 symmetrically installed on both sides of the bottom plate 11. The automatic cutting assembly 6 is located in the center of the bottom plate 11. The product positioning plate 2 can cover the two side plates 12, and the product positioning plate 2 is parallel to the bottom plate 11. The product positioning plate 2 has a cutting window 21 in the center, which is opposite to the automatic cutting assembly 6. The two sides of the cutting window 21 are product placement areas 22. Two sheet-like injection molded products 3 are connected by gate material 4. The two injection molded products 3 are placed in the product placement areas 22 on both sides, with the gate material 4 aligned with the cutting window 21. The positioning and clamping mechanism 5 clamps the two injection molded products 3 from above. The automatic cutting assembly 6 passes through the cutting window 21 and automatically punches and cuts the connection point between the gate material 4 and the injection molded products 3. This tooling can quickly cut off the gate material 4 in one go, and it features accurate positioning, uniform cutting force and fast cutting speed.

[0019] The positioning and clamping mechanism 5 includes a pressure plate 51, a hinge block 53, a fastening block 54, and wing screws 55. The hinge block 53 and the fastening block 54 are respectively located at both ends of the cutting window 21. Both the hinge block 53 and the fastening block 54 are fixedly connected to the product positioning plate 2. The pressure plate 51 is arranged along the direction of the cutting window 21. One end of the pressure plate 51 is hinged to the hinge block 53. Pressure parts 52 extend vertically from both sides of the pressure plate 51. The pressure plate 51 rotates around the hinge block 53 and presses down. The pressure parts 52 on both sides are... The pressure plate 51 is pressed against the injection-molded products 3 on both sides. The front end of the pressure plate 51 is provided with a groove 511. The fastening block is U-shaped. When the pressure plate is rotated downward to the lowest position, the front end of the pressure plate 51 rests on the fastening block 54. The groove 511 is opposite to the U-shaped groove of the fastening block 54. The bottom of the U-shaped groove of the fastening block 54 is provided with a screw hole. The wing screw 55 can pass vertically through the groove 511 and connect to the screw hole, locking the pressure plate 51 and the fastening block 54. The head of the wing screw 55 is blocked on the pressure plate 51. There are no less than two pressing parts 52 on both sides of the pressure plate 51. The pressing part 52 includes a support bar 521, a vertical pressure bar 522 and a flexible pressure foot 523. The support bar 521 and the pressure plate 51 are integrally molded parts. The end of the support bar 521 is vertically connected to the vertical pressure bar 522. The bottom of the vertical pressure bar 522 is provided with a flexible pressure foot 523. The flexible pressure foot 523 is cylindrical and made of rubber. The pressing parts 52 on both sides of the pressure plate 51 can press on the injection molded product 3, press the injection molded product 3 tightly, keep it stable when cutting, prevent it from being cut crooked, and make the cut more even.

[0020] The sprue 4 has two connection points 41 between it and the injection molded products 3 on both sides. A fixing baffle 23 is provided in the middle of the cutting window 21, and the fixing baffle 23 is supported in the middle of the sprue 4. The product placement area 22 is provided with multiple limiting protrusions 221, which can be fitted and engaged with the injection molded products 3 placed therein to position the injection molded products 3. The limiting protrusions 221 can prevent the injection molded products 3 from sliding on the plane and have a horizontal fixing effect on the injection molded products 3.

[0021] The automatic cutting assembly 6 includes a cylinder 61, a slide rail 62, a piston rod 63, a cutter head base 64, and a cutting cutter head 65. A set of slide rails 62 is provided on the base plate 11, and the cylinder 61 is arranged between the slide rails 62. The front end of the cylinder 61 is connected to the piston rod 63, which is parallel to the slide rail 62. Multiple cutter head bases 64 are connected to the piston rod 63. The bottom of each cutter head base 64 is slidably connected to the slide rail 62. A cutting cutter head 65 is fixedly connected to each cutter head base 64. The cutting cutter head 65 corresponds one-to-one with the connection point 41 between the sprue 4 and the injection molded product 3. The cutting cutter head 65 extends vertically into the cutting window 21. The front side of the cutting cutter head 65 is the cutting edge 651. The cylinder 61 drives all the cutting cutter heads 65 to move forward, and all the cutting cutter heads 65 simultaneously cut off the connection point 41 between the sprue 4 and the injection molded product 3.

[0022] The operation process of this utility model is as follows: The injection molded product 3 is manually placed on the product positioning plate 2. The two injection molded products 3 respectively engage with the limiting protrusions 221 on the product placement areas 22 on both sides, so that the injection molded products 3 are horizontally positioned. The sprue material 4 between the injection molded products 3 covers the cutting window 21. The fixed baffle 23 supports the sprue material 4. After the material is placed, the pressure plate 51 is pressed down around the hinge block 53. After the four pressing parts 52 have compacted the injection molded product 3, the front end of the pressure plate 51 is locked with the fastening block 54 by manually tightening the wing screws 55. The pressure plate 51 is kept in a stable and compacted state. In this state, the cylinder 61 is started. The cylinder 61 drives the piston rod 63 to move forward. The piston rod 63 simultaneously drives multiple cutter head bases 64 to push forward along the slide rail 62. The blade 651 of each cutting cutter head 65 is aligned with the corresponding connection point 41 to cut the material. The sprue material 4 and the multiple connection points 41 of the injection molded products 3 on both sides are cut off at the same time, completing the automatic sprue material removal operation.

[0023] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A semi-automatic tooling for cutting off gates, characterized in that: The device includes a base, a product positioning plate, injection molded products, a positioning and clamping mechanism, and an automatic cutting assembly. The base includes a bottom plate and side plates, with the side plates symmetrically installed on both sides of the bottom plate. An automatic cutting assembly is located in the center of the bottom plate. The product positioning plate can cover the two side plates accordingly. The product positioning plate and the bottom plate are parallel. The product positioning plate has a cutting window in the center, which is opposite to the automatic cutting assembly. The two sides of the cutting window are product placement areas. Two sheet-like injection molded products are connected by a sprue. The two injection molded products are placed in the product placement areas on both sides, with the sprue aligned with the cutting window. The positioning and clamping mechanism clamps the two injection molded products from above. The automatic cutting assembly passes through the cutting window and automatically punches and cuts the connection point between the sprue and the injection molded products.

2. The tooling for semi-automatic gate cutting according to claim 1, characterized in that: There are two connection points between the gate material and the injection molded products on both sides. A fixed baffle is provided in the middle of the cutting window, and the fixed baffle is supported in the middle of the gate material.

3. The tooling for semi-automatic gate cutting according to claim 2, characterized in that: The positioning and clamping mechanism includes a pressure plate, a hinge block, a fastening block, and wing screws. The hinge block and fastening block are respectively located at both ends of the cutting window. Both the hinge block and the fastening block are fixedly connected to the product positioning plate. The pressure plate is set along the direction of the cutting window. One end of the pressure plate is hinged to the hinge block. There are pressing parts extending vertically from both sides of the pressure plate. The pressure plate rotates around the hinge block and presses down. The pressing parts on both sides press against the injection molded products on both sides and clamp them. The front end of the pressure plate is provided with a groove. The fastening block is U-shaped. When the pressure plate rotates down to the lowest position, the front end of the pressure plate falls on the fastening block. The groove is opposite to the U-shaped groove of the fastening block. The bottom of the U-shaped groove of the fastening block is provided with a screw hole. The wing screw can pass vertically through the groove and connect to the screw hole to lock the pressure plate and the fastening block. The head of the wing screw is blocked on the pressure plate.

4. The tooling for semi-automatic gate cutting according to claim 3, characterized in that: The pressure plate has at least two pressing parts on both sides. Each pressing part includes a support bar, a vertical pressure bar, and a flexible pressure foot. The support bar and the pressure plate are integrally formed. The end of the support bar is vertically connected to the vertical pressure bar. The bottom of the vertical pressure bar is provided with a flexible pressure foot. The flexible pressure foot is cylindrical and made of rubber.

5. The tooling for semi-automatic gate cutting according to claim 4, characterized in that: The product placement area is provided with multiple limiting protrusions, which can be embedded and engaged with the injection molded product placed therein to position the injection molded product.

6. The tooling for semi-automatic gate cutting according to claim 5, characterized in that: The automatic cutting assembly includes a cylinder, a slide rail, a piston rod, a cutter head base, and a cutting head. A set of slide rails is provided on the base plate, and the cylinder is arranged between the slide rails. The front end of the cylinder is connected to a piston rod parallel to the slide rail. Multiple cutter head bases are connected to the piston rod. The bottom of each cutter head base is slidably connected to the slide rail, and a cutting head is fixedly connected to each cutter head base. The cutting head corresponds one-to-one with the connection point between the sprue and the injection molded product. The cutting head extends vertically into the cutting window, and the front side of the cutting head is the cutting edge. The cylinder drives all the cutting heads to move forward, and all the cutting heads simultaneously cut off the connection point between the sprue and the injection molded product.

Images