Mold for forming a combination of double guide rail inclined slider and tunnel slider

Abstract

The invention discloses a mold for forming a combination of a double-guide inclined slider and a tunnel slider, and belongs to the field of thermoplastic plastic molding molds. The mold realizes the linear motion of the hook leg 23 through the elastic force of the spring A24 and the friction force of the damping pin, and prompts the slider core 27 to make a lateral linear motion through the elastic force of the spring B28 to disengage from the first undercut of the plastic product. The inclined slider A14 and the inclined slider B15 are pushed by the ejection rod A18 and the ejection rod B19, and the inclined slider A14 and the inclined slider B15 slide obliquely under the guidance of the double guide rails provided on the inclined slider A14 and the inclined slider B15 to disengage from the second undercut of the plastic product, thereby solving the problem in the molding of plastic products with undercuts, and is particularly suitable for the situation where the undercut of the plastic product is in the deep cavity of the injection mold, saving the mold cost, simplifying the mold structure, working smoothly and reliably, effectively utilizing the mold space, and improving the production efficiency.

Description

Technical Field

[0001] The invention belongs to the field of thermoplastic plastic molding molds, and relates to a mold formed by combining a double-guide rail inclined slider and a tunnel slider. The invention is mainly used for injection molds of plastic products with undercuts, and is particularly used for situations where the undercuts of plastic products need to be molded in a deep cavity of the injection mold. Background Art

[0002] Plastic products are widely used in our lives and production. Their advantages are mainly reflected in light weight, multiple practical application functions, good physical and chemical properties, good plasticity and sustainable utilization. In order to meet specific functions, plastic products are often provided with various undercut shapes. For the situation where the undercut of plastic products needs to be molded in the deep cavity of the injection mold, the conventional slider structure or inclined top structure cannot realize injection molding production. Summary of the invention

[0003] The purpose of the present invention is to provide a mold for combining a double-guide rail inclined slider and a tunnel slider, which relies on the coordinated use of springs, hook legs, double-guide rail inclined sliders and tunnel sliders to achieve demoulding of deep-cavity undercuts of plastic products to prevent strain and ensure stable production of plastic products.

[0004] The technical problem to be solved by the present invention is to provide a mold for combining a double-rail inclined slider and a tunnel slider, which solves the problems in the injection molding of plastic products with undercuts, especially the problem that the undercuts of plastic products need to be molded in the deep cavity of the injection mold, and produces plastic products that meet technical requirements and usage requirements.

[0005] The technical scheme of the present invention is: the structure of the mold formed by the combination of double guide rail inclined slider and tunnel slider includes: fixed mold bottom plate 1, hot runner plate 2, fixed mold plate 3, movable mold plate 4, movable mold pad A5, movable mold pad B6, square iron 7, face needle plate group A8, face needle plate group B9, movable mold bottom plate 10, fixed mold insert 11, movable mold insert 12, movable mold insert A13, inclined slider A14, inclined slider B15, positioning block A16, positioning block B17, ejector rod A18, ejector rod B19, movable mold insert B20, cushion block 21, pressure block 22, hook leg 23, spring A24, fixed block A25, fixed block B26, slider core 27, spring B28, guide block 29, limit block 30, fixed block C31, spring C32, shoulder bolt 3 3 and dome rod 34, the connection relationship is that the fixed mold bottom plate 1 is in surface contact with the hot runner plate 2 and is locked and fixed by bolts, the hot runner plate 2 is in surface contact with the fixed mold plate 3 and is locked and fixed by bolts, the fixed mold bottom plate 1, the hot runner plate 2 and the fixed mold plate 3 are connected by guide columns, the movable mold pad B6 is provided with guide columns, the fixed mold plate 3, the movable mold plate 4 and the movable mold pad A5 are provided with guide sleeves, the fixed mold plate 3, the movable mold plate 4, the movable mold pad A5 and the movable mold pad B6 are connected by guide columns and guide sleeves, the movable mold bottom plate 10 is in surface contact with the square iron 7 and is locked and fixed by bolts, the square iron 7 is in surface contact with the movable mold pad B6, the square iron 7, the movable mold pad B6 and the movable mold bottom plate 10 are locked and fixed by bolts, the face needle plate group A8 is in contact with the stepped surface provided on the square iron 7 and is limited, and the face needle plate group B9 is in surface contact with the movable mold bottom plate 10 The fixed mold insert 11 is in surface contact with the fixed mold plate 3 and is tightly matched and fixed by bolts. The movable mold insert A13 is in surface contact with the movable mold insert 12 and is limited by the hanging platform. The movable mold insert A13, the movable mold insert 12 and the movable mold plate 4 are in surface contact and tightly matched. The movable mold insert A13, the movable mold insert 12 and the movable mold pad A5 are in surface contact and fixed by bolts. The inclined slider A14 is provided with a through cavity and an inclined surface. Two bosses are provided on the through cavity. Two guide rails are provided on the ejector rod A18. The bosses provided on the inclined slider A14 are in surface contact and sliding match with the guide rails provided on the ejector rod A18. The connection method of the inclined slider B15 and the ejector rod B19 is the same as the connection method of the inclined slider A14 and the ejector rod A18. The inclined surface provided on the inclined slider A14 and the inclined slider B15 The inclined surfaces arranged on the upper surface are respectively in surface contact and sliding cooperation with the movable mold insert A13, the inclined slider A14 and the inclined slider B15 are in clearance cooperation with the positioning block A16, the ejector rod A18 and the ejector rod B19 are in surface contact and sliding cooperation with the positioning block A16, the ejector rod A18 and the ejector rod B19 are in surface contact and sliding cooperation with the positioning block B17, the positioning block A16 and the positioning block B17 are in surface contact and positioned by pins and are locked and fixed by bolts, the positioning block A16 and the positioning block B17 are in surface contact and tightly matched with the movable mold pad A5 and are locked and fixed by bolts, the ejector rod A18 and the ejector rod B19 are in clearance cooperation with the movable mold pad B6, the ejector rod A18 and the ejector rod B19 are in surface contact and fixed with the face needle plate group A8 and are locked and fixed by bolts, the movable mold insert B20 is in surface contact and cooperates with the positioning block B17,The movable mold insert B20 is in surface contact with the cushion block 21 and is limited by the hanging platform. The cushion block 21 is in surface contact with the movable mold pad B6 and is tightly matched and fixed by bolts. The pressure block 22 is in surface contact with the fixed mold plate 3 and is tightly matched and fixed by bolts. The hook leg 23 is in surface contact with the movable mold plate 4 and is tightly matched by the hanging platform and is fixed by bolts. A damping pin is installed between the hook leg 23 and the pressure block 22, and the damping pin is fixed on the hook leg 23 by bolts. The spring A24 is in clearance with the movable mold plate 4, and the spring A24 is in surface contact with the hook leg 23 and is limited. The slider core 27 is in surface contact with the fixed block C31 and is tightly matched and limited by the hanging platform. The head of the slider core 27 is in surface contact with the movable mold insert B20 and is sealed. The guide block 29 is in surface contact with the fixed block C31 and is fixed by bolts. The pin is positioned and locked. A through groove is provided on the fixed block A25, and a boss is provided on the fixed block B26. The fixed block A25 and the fixed block B26 are in surface contact and limited by the boss. The slider core 27, the fixed block C31 and the guide block 29 are fixed as a whole, and the square hole formed by the fixed block A25 and the fixed block B26 is in contact and sliding fit. The limit block 30 is in contact with the fixed block A25 and is fixed by bolts. The guide block 29 is limited in the mold opening state. The hook leg 23 is in contact and sliding fit with the fixed block A25. The hook leg 23 is in tight wedge fit with the inclined surface of the guide block 29. The spring C32 is in clearance fit with the movable template 4. The spring C32 is in surface contact with the fixed template 3. The shoulder bolt 33 is connected to the surface needle plate group B9 in surface contact with the hanging platform. The shoulder bolt 33 is connected to the surface needle plate group A8 with bolts. The dome rod 34 is in surface contact and sliding fit with the movable mold insert A13. The dome rod 34 is in clearance fit with the movable template 4, the movable mold pad A5, the movable mold pad B6 and the surface needle plate group A8. The dome rod 34 is in clearance fit with the surface needle plate group B9 and is connected and limited by the hanging platform.

[0006] The working principle of the mold formed by the combination of the double guide rail inclined slider and the tunnel slider is as follows: the fixed mold plate 3 and the movable mold plate 4 are separated first by the elastic force of the spring C32, and the hook leg 23 moves linearly when the fixed mold plate 3 and the movable mold plate 4 are opened by the coordinated action of the damping pin and the spring A24, and the wedging force of the hook leg 23 on the guide block 29 is removed. Under the push of the elastic force of the spring B28, the slider core 27 slides and separates from the movable mold insert B20, and at the same time detaches from the first undercut on the plastic product. When ejecting, under the action of the molding machine, the shoulder bolt 3 is used to 3 realizes the synchronous ejection of the face needle plate group A8 and the face needle plate group B9 first, and the inclined slide block A14 and the inclined slide block B15 respectively make an oblique sliding motion under the action of the ejection rod A18 and the ejection rod B19 to separate from the second undercut of the plastic product. At this time, the dome rod 34 makes a linear ejection motion. When the face needle plate group A8 contacts the movable mold pad B6, the face needle plate group A8 stops moving, the oblique slide block A14 and the oblique slide block B15 stop oblique sliding, and the face needle plate group B9 drives the dome rod 34 to continue to make a linear ejection motion, thereby realizing the complete ejection of the product.

[0007] The beneficial effects of the present invention are as follows: the mold realizes the linear motion of the hook leg 23 through the elastic force of the spring A24 and the friction force of the damping pin, and the elastic force of the spring B28 causes the slider core 27 to make a lateral linear motion to disengage from the first undercut of the plastic product, and the ejection rod A18 and the ejection rod B19 push the inclined slider A14 and the inclined slider B15, so that the inclined slider A14 and the inclined slider B15 slide obliquely under the guidance of the double guide rails provided on the inclined slider A14 and the inclined slider B15 to disengage from the second undercut of the plastic product, thereby solving the problems in the mold forming of plastic products with undercuts, and is particularly suitable for the situation where the undercut of the plastic product is in the deep cavity of the injection mold, saving the mold cost, simplifying the mold structure, working smoothly and reliably, effectively utilizing the mold space, and improving the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The following is a detailed description of the embodiments with reference to the accompanying drawings.

[0009] Figure 1 This is a schematic diagram of the assembly of the mold composed of a double-guide inclined slider and a tunnel slider. Figure 1 .

[0010] Figure 2 This is a schematic diagram of the assembly of the mold composed of a double-guide inclined slider and a tunnel slider. Figure 2 .

[0011] Figure 3 This is a schematic diagram of the assembly of the mold composed of a double-guide inclined slider and a tunnel slider. Figure 3 .

[0012] Figure 4 This is a schematic diagram of the internal components of the mold formed by combining a double-guide inclined slider and a tunnel slider. Figure 4 .

[0013] Figure 5 This is a schematic diagram of the internal components of the mold formed by combining a double-guide inclined slider and a tunnel slider. Figure 5 .

[0014] Figure 6 This is a schematic diagram of the internal components of the mold formed by combining the double guide rail inclined slider and the tunnel slider. Figure 6 .

[0015] In the figure: 1 fixed mold base plate; 2 hot runner plate; 3 fixed mold plate; 4 movable mold plate; 5 movable mold pad A; 6 movable mold pad B; 7 square iron; 8 face needle plate group A; 9 face needle plate group B; 10 movable mold base plate; 11 fixed mold insert; 12 movable mold insert; 13 movable mold insert A; 14 inclined slider A; 15 inclined slider B; 16 positioning block A; 17 positioning block B; 18 ejector rod A; 19 ejector rod B; 20 movable mold insert B; 21 cushion block; 22 pressure block; 23 hook leg; 24 spring A; 25 fixed block A; 26 fixed block B; 27 slider core; 28 spring B; 29 guide block; 30 limit block; 31 fixed block C; 32 spring C; 33 shoulder bolt; 34 dome rod. DETAILED DESCRIPTION

[0016] The specific embodiments of the invention are described in detail below with reference to technical texts and drawings.

[0017] When assembling the mold, the fixed mold base plate 1 is in contact with the hot runner plate 2, and the bolts pass through the fixed mold base plate 1 to lock it with the hot runner plate 2. The fixed mold insert 11 is installed in the mold cavity processed by the fixed mold plate 3, and the bolts pass through the fixed mold insert 11 to lock it with the fixed mold plate 3. The bolts pass through the fixed mold plate 3 to lock it with the hot runner plate 2, and the pressing block 22 is installed in the countersunk hole processed by the fixed mold plate 3, and the bolts pass through the pressing block 22 to lock it with the fixed mold plate 3 (see Figure 1 The movable mold insert A13 is mounted in the through cavity processed by the movable mold insert 12 and is limited by the hanging platform. The inclined slider A14 and the inclined slider B15 are mounted in the inclined cavity processed by the movable mold insert A13. The movable mold insert A13, the movable mold insert 12, the inclined slider A14 and the inclined slider B15 are mounted as a whole in the through cavity processed by the movable mold plate 4. The damping pin is mounted in the countersunk hole processed on the hook leg 23 and is locked and positioned by the bolt. The bolt passes through the bolt through hole processed on the hook leg 23. The spring A24 is worn on the bolt. The hook leg 23 and the spring A24 are mounted as a whole in the square hole processed by the movable mold plate 4. The bolt will hook the The legs 23 are locked and fixed by the hanging platform set on the hook legs 23; the movable mold insert B20 is installed in the cavity processed by the cushion block 21 and is limited by the hanging platform. The movable mold insert B20 and the cushion block 21 are installed as a whole in the cavity processed by the movable mold pad B6. The bolts pass through the movable mold pad B6 to lock and fix the cushion block 21. The positioning block A16 and the positioning block B17 are equipped. The bolts pass through the positioning block A16 to lock and fix it with the positioning block B17. The positioning block A16 and the positioning block B17 are installed as a whole in the cavity processed by the movable mold pad A5. The bolts pass through the movable mold pad A5 to lock and fix the positioning block B17 (see Figure 2The slider core 27 is installed in the mold cavity processed by the fixed block C31, the pin is installed in the pin hole processed on the guide block 29 and the fixed block C31 to limit its position, the bolt passes through the fixed block C31 to fix it with the guide block 29, the fixed block A25 and the fixed block B26 are assembled and fixed by bolts, the slider core 27, the fixed block C31 and the guide block 29 are installed as a whole in the through cavity formed by the assembly of the fixed block A25 and the fixed block B26, and the limit block 30 is installed on the stepped table processed on the fixed block A25 (see Figure 3 , 4 The bolt passes through the limit block 30 to lock it with the fixed block A25, the spring B28 is sleeved on the slider core 27, and the fixed block A25 and the fixed block B26 assembly are installed as a whole in the tunnel processed by the movable mold pad A5 (see Figure 2 The dome rod 34 is installed in the ejector rod hole processed by the needle plate group B and is limited by the hanging platform. The ejector rod A18 and the ejector rod B19 are installed in the countersunk holes processed by the needle plate group A8. The bolts pass through the needle plate group A8 to lock it. The shoulder bolt 33 passes through the needle plate group B9 and is locked with the needle plate group A8 (see Figure 3 The movable mold bottom plate 10 is in contact with the square iron 7, and the bolts pass through the movable mold bottom plate 10 to lock it with the square iron 7; the ejector rod A18 and the ejector rod B19 pass through the movable mold plate 4, the movable mold pad A5 and the movable mold pad B6 and are respectively assembled with the inclined slider A14 and the inclined slider B15, and the dome rod 34 passes through the movable mold plate 4, the movable mold pad A5 and the movable mold pad B6 and is assembled with the movable mold insert A13; the bolts pass through the movable mold plate 4 to lock it with the movable mold pad A8, and the bolts pass through the movable mold bottom plate 10 and the square iron 7 to lock it with the movable mold pad B6 (see Figure 1 ).

[0018] The mold movement process is as follows: after injection molding is completed, under the action of the elastic force of spring C32, the fixed mold plate 3 and the movable mold plate 4 are first separated, and under the action of the damping pin and spring A24, the hook leg 23 pushes the guide block 29 to slide, and the elastic force of spring B28 pushes the fixed block C31 to make a linear motion to disengage from the first undercut on the plastic product, and the molding machine pushes the face needle plate group B9 to make a linear motion, and under the action of the shoulder bolt 33, the face needle plate group A8 makes a linear motion together with the face needle plate group B9, and the dome rod 34 and the inclined slider A14 and the inclined slider B15 act on the plastic product together, and the inclined slider A14 and the inclined slider B15 disengage from the second undercut on the plastic product, and the face needle plate group A8 stops moving when it contacts the movable mold pad B6, and the face needle plate group B9 continues to move forward under the action of the molding machine so that the dome rod 34 ejects the plastic product from the cavity.

[0019] The above is a superior implementation mode of the present invention. It should be pointed out that for technicians in the technical field to which the present invention belongs, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The mold for combining double guide rail inclined slider and tunnel slider is characterized by The structure comprises: a fixed mold base plate (1), a hot runner plate (2), a fixed mold plate (3), a movable mold plate (4), a movable mold pad A (5), a movable mold pad B (6), a square iron (7), a face needle plate group A (8), a face needle plate group B (9), a movable mold base plate (10), a fixed mold insert (11), a movable mold insert (12), a movable mold insert A (13), an inclined slider A (14), an inclined slider B (15), a positioning block A (16), a positioning block B (17), an ejector rod A (18), an ejector rod B (19), a movable mold insert B (20), a cushion block (21), a pressure block (22), a hook leg (23), a spring A (24), a fixed block A (25), a fixed block B (26), a slider core (27), a spring B (28), a guide The front and rear portions of the present invention are provided with a guide block (29), a limit block (30), a fixed block C (31), a spring C (32), a shoulder bolt (33) and a dome rod (34); the connection relationship is that the face needle plate group A (8) contacts and limits the stepped surface provided on the square iron (7), the inclined slider A (14) is provided with a through cavity and an inclined surface, the through cavity is provided with two bosses, the ejector rod A (18) is provided with two guide rails, the boss provided on the inclined slider A (14) and the guide rail surface provided on the ejector rod A (18) are in contact and sliding cooperation, the connection mode of the inclined slider B (15) and the ejector rod B (19) is the same as the connection mode of the inclined slider A (14) and the ejector rod A (18), the inclined surface provided on the inclined slider A (14) and the inclined surface provided on the inclined slider B (15) are the same as the connection mode of the inclined slider A (14) and the ejector rod A (18), and the inclined surface provided on the inclined slider A (14) and the inclined surface provided on the inclined slider B (15) are the same as the connection mode of the inclined slider A (14) and the ejector rod A (18). The ejector rods A (18) and B (19) are respectively in surface contact and sliding fit with the movable mold insert A (13); the ejector rods A (18) and B (19) are in surface contact and sliding fit with the positioning block A (16); the ejector rods A (18) and B (19) are in surface contact and sliding fit with the positioning block B (17); the positioning blocks A (16) and B (17) are in surface contact and are positioned by pins and are locked and fixed by bolts; the positioning blocks A (16) and B (17) are in surface contact and tightly fit with the movable mold pad A (5) and are locked and fixed by bolts; the ejector rods A (18) and B (19) are in surface contact and tightly fit with the face needle plate assembly A (8) and are locked and fixed by bolts; the pressure block (22) is in surface contact and tightly fit with the fixed mold plate (3) and is locked and fixed by bolts; the hook leg (23) is in surface contact and tightly fit with the movable mold plate (4) The matching is fixed by bolts and is limited by the hanging table. A damping pin is installed between the hook leg (23) and the pressure block (22). The damping pin is fixed on the hook leg (23) by bolts. The spring A (24) is matched with the movable plate (4) in clearance. The spring A (24) and the hook leg (23) are in surface contact and limited. The slider core (27) and the fixed block C (31) are in surface contact and tightly matched and are limited by the hanging table. The head of the slider core (27) and the movable mold insert B (20) are in surface contact and sealed. The guide block (29) and the fixed block C (31) are in surface contact and are fixed by bolts. The fixed block A (25) is provided with a through groove, and the fixed block B (26) is provided with a boss. The fixed block A (25) and the fixed block B (26) are in surface contact and limited by the boss and are fixed by bolts.The slider core (27), the fixed block C (31) and the guide block (29) are as a whole and cooperate with the fixed block A (25) and the fixed block B (26) to form a square hole surface contact sliding fit, the limit block (30) and the fixed block A (25) are surface contact and fixed by bolts, the guide block (29) is limited in the mold open state, the hook leg (23) and the fixed block A (25) are surface contact and sliding fit, the hook leg (23) and the guide block (29) are wedge-tight fit, the shoulder bolt (33) and the needle plate group B (9) are surface contact and connected to the hanging table, and the shoulder The bolt (33) is bolted to the needle plate assembly A (8), and the damping pin and the spring A (24) cooperate to realize the linear motion of the hook leg (23), and the wedging force of the hook leg (23) on the guide block (29) is removed. Under the push of the elastic force of the spring B (28), the slider core (27) slides and separates from the movable mold insert B (20), and at the same time, it is separated from the first undercut on the plastic product. The inclined slider A (14) and the inclined slider B (15) respectively slide obliquely under the action of the ejector rod A (18) and the ejector rod B (19) to separate from the second undercut of the plastic product.

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