Guide insert pin mechanism of plastic mould

Abstract

The utility model relates to the technical field of plastic molds, in particular to a guide insert pin mechanism of a plastic mold, which comprises a mold core and a plastic notch arranged on the mold core, a blind insert is detachably mounted at the top of the mold core, a plurality of guide holes are arranged in the blind insert, mounting holes corresponding to the plurality of guide holes are arranged in the plastic notch, and the guide holes are arranged in the mounting holes. A first guide needle and a second guide needle are inserted into the mounting hole, and the length of the first guide needle is smaller than that of the second guide needle. When the bottom end of the blind insert is close to a rubber notch in a mold core, the blind insert firstly moves downwards along the second guide needle, and after the blind insert descends to a certain degree, the first guide needle is sleeved in the inner guide hole, so that the blind insert is ensured to vertically fall, shaking is prevented, and manual position finding is not needed; and the bottom of the blind insert extrudes the spring ring to move outside the first guide needle, so that the friction force between the blind insert and the first guide needle is increased, and the blind insert is prevented from moving too fast to damage the glue notch.

Description

Technical Field

[0001] This utility model relates to the field of plastic mold technology, and in particular to a plastic mold guide pin mechanism. Background Technology

[0002] Blind inserts in plastic molds are mainly used to support or lift mold components and assist in product molding. Due to their large size, blind inserts cannot be held by hand during installation by a fitter. A crane is needed to lift the blind insert and install it into the mold core. However, the crane cannot control the vertical drop, so manual positioning is required. During the moment of shaking, the sealing opening of the mold core is often damaged. Therefore, the insert pins of large blind inserts in plastic molds are needed for guidance.

[0003] In the prior art, such as the patent with publication number CN208180153U, a mold insert structure is disclosed, including a push plate, a mold plate located above the push plate, a rear mold core located inside the mold plate, and a front mold core installed above the rear mold core. A guide part is provided above the mold plate, and the free end of the guide part is an inclined surface for guiding the front mold core in. A positioning device for positioning the front mold core is provided on the side wall of the rear mold core.

[0004] The above structure can guide the front mold core into the rear mold core, effectively protecting the insert structure. However, when the blind insert connects downwards to the mold core inside the mold core, the blind insert cannot guarantee vertical entry and is prone to moving too fast and damaging the glue groove. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a plastic mold guide insert mechanism to solve the problem that when the blind insert is connected downward to the mold core, the blind insert cannot be guaranteed to fall vertically and is prone to moving too fast and damaging the mold groove.

[0006] Based on the above objectives, this utility model provides a plastic mold guide insert mechanism, including a mold core and a glue groove on the mold core. The glue groove is inverted stepped shape. A blind insert is detachably installed on the top of the mold core. The blind insert has several guide holes inside. The glue groove has mounting holes corresponding to the several guide holes inside. A first guide pin and a second guide pin are inserted into the mounting holes.

[0007] The bottom ends of the first guide pin and the second guide pin are both fixedly mounted with a hanging platform, and the length of the first guide pin is less than the length of the second guide pin.

[0008] The first guide pin has a groove on its outer side, and a spring ring is sleeved on the top of the first guide pin. The spring ring is used to slow down the movement speed of the blind insert outside the first guide pin. The inner wall of the guide hole has a slot, and the groove corresponds to the slot.

[0009] Preferably, the diameters of the first guide pin and the second guide pin are both matched with the diameter of the guide hole, and the first guide pin and the second guide pin are both inserted vertically into the guide hole.

[0010] Preferably, there are at least four sets of the first guide pins and at least three sets of the second guide pins. The tips of both the first and second guide pins are set to be inverted spherical. The first guide pins are distributed at the bottom edge of the blind insert, and the second guide pins are distributed at the bottom center of the blind insert.

[0011] Preferably, the spring coil has an internal break, and the spring coil is a spring component.

[0012] Preferably, the inner diameter of the spring coil matches the outer diameter of the groove, and the outer diameter of the spring coil matches the inner diameter of the slot.

[0013] Preferably, the bottom end of the blind insert is chamfered, and the blind insert is a hollow ring.

[0014] The beneficial effects of this utility model are:

[0015] When the overhead crane lifts the blind insert into the mold core, since the length of the first guide pin is less than the length of the second guide pin, the guide hole inside the blind insert first contacts the top of the second guide pin, causing the blind insert to move downward along the second guide pin. After the blind insert has descended to a certain extent, the first guide pin is then inserted into the internal guide hole to ensure that the blind insert falls vertically and prevents shaking without the need for manual positioning.

[0016] When the bottom of the blind insert approaches the inner groove of the mold core, the bottom of the blind insert presses against the outside of the first guide pin as the first guide pin moves downward. After the spring ring is inserted into the groove outside the first guide pin, the outer edge of the mounting hole sleeve of the spring ring faces downward, increasing the friction between the blind insert and the first guide pin. This slows down the descent speed of the blind insert as it approaches the inner groove of the mold core, preventing the blind insert from moving too fast and damaging the groove. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of the entire utility model;

[0019] Figure 2 This is an exploded structural diagram of the blind insert and mold core of this utility model;

[0020] Figure 3 This is a schematic diagram showing the distribution structure of the first guide pin and the second guide pin of this utility model;

[0021] Figure 4 This utility model Figure 3 Schematic diagram of the cross-sectional structure at point AA;

[0022] Figure 5 This is a schematic diagram of the connection structure between the first guide pin, the guide hole, and the mounting hole of this utility model.

[0023] The markings in the diagram are as follows: 1. Mold core; 2. Blind insert; 3. Guide hole; 4. Mounting hole; 5. Glue groove opening; 6. First guide pin; 7. Second guide pin; 8. Hanging platform; 9. Groove; 10. Spring ring; 11. Break; 12. Slot. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a plastic mold guide pin mechanism includes a mold core 1 and a glue groove 5 opened on the mold core 1. The glue groove 5 is inverted stepped. A blind insert 2 is detachably installed on the top of the mold core 1. A number of guide holes 3 are opened inside the blind insert 2. The glue groove 5 is opened inside the glue groove 5 and mounting holes 4 corresponding to the number of guide holes 3 are opened inside the mounting holes 4. A first guide pin 6 and a second guide pin 7 are inserted into the mounting holes 4.

[0026] The bottom ends of the first guide pin 6 and the second guide pin 7 are both fixedly mounted with a hanging platform 8, and the length of the first guide pin 6 is less than the length of the second guide pin 7.

[0027] The first guide pin 6 has a groove 9 on its outer side, and a spring ring 10 is sleeved on the top of the first guide pin 6. The spring ring 10 is used to slow down the movement speed of the blind insert 2 outside the first guide pin 6. The guide hole 3 has a slot 12 on its inner wall, and the groove 9 corresponds to the slot 12.

[0028] In this embodiment, when the overhead crane installs the blind insert 2 into the mold core 1, since the length of the first guide pin 6 is less than the length of the second guide pin 7, the guide hole 3 inside the blind insert 2 first contacts the top of the second guide pin 7, causing the blind insert 2 to move downward along the second guide pin 7. After the blind insert 2 descends to a certain extent, the first guide pin 6 is then inserted into the internal guide hole 3 to ensure that the blind insert 2 falls vertically and prevents shaking without the need for manual positioning.

[0029] When the bottom of the blind insert 2 approaches the inner groove 5 of the mold core 1, the bottom of the blind insert 2 presses against the spring ring 10 as the first guide pin 6 moves downward. This continues until the spring ring 10 is inserted into the groove 9 outside the first guide pin 6. The mounting hole 4 then connects to the outer periphery of the spring ring 10 and moves downward, increasing the friction between the blind insert 2 and the first guide pin 6. This slows down the descent speed of the blind insert 2 as it approaches the inner groove 5 of the mold core 1.

[0030] As one implementation method, such as Figure 2 and Figure 3 As shown, the diameters of the first guide pin 6 and the second guide pin 7 are both matched with the diameter of the guide hole 3, and the first guide pin 6 and the second guide pin 7 are both inserted vertically into the guide hole 3.

[0031] In this embodiment, when the blind insert 2 descends and contacts the mold core 1, since the diameters of the first guide pin 6 and the second guide pin 7 match the diameter of the guide hole 3, the guide hole 3 inside the blind insert 2 fits snugly into the first guide pin 6 and the second guide pin 7, and the first guide pin 6 and the second guide pin 7 are used to ensure that the blind insert 2 falls vertically.

[0032] As one implementation method, such as Figure 2 and Figure 3 As shown, there are at least four sets of first guide pins 6 and at least three sets of second guide pins 7. The tops of both the first guide pins 6 and the second guide pins 7 are set to inverted spherical shapes. The first guide pins 6 are distributed at the bottom edge of the blind insert 2, and the second guide pins 7 are distributed at the bottom center of the blind insert 2.

[0033] In this embodiment, the inverted spherical shape improves the connection between the guide hole 3 inside the blind insert 2 and the guide pin, making it easier for the guide pin to be inserted into the guide hole 3;

[0034] In this design, multiple sets of first guide pins 6 and second guide pins 7 are distributed on the mold core 1. When the blind insert 2 descends and contacts the mold core 1, the guide pins ensure that the blind insert 2 falls vertically into place, preventing shaking and eliminating the need for manual positioning.

[0035] As one implementation method, such as Figure 5 As shown, the spring coil 10 has a break 11 inside, and the spring coil 10 is a spring component.

[0036] In this embodiment, by utilizing the break 11 inside the spring coil 10, when the spring coil 10 is inserted into the groove 9 outside the first guide pin 6, the spring coil 10 shrinks inward due to the design of the break 11. After shrinkage, the mounting hole 4 sleeves the outer periphery of the spring coil 10 downward, increasing the friction between the blind insert 2 and the first guide pin 6, reducing the downward movement speed of the blind insert 2, and preventing the blind insert 2 from moving downward too fast and damaging the glue groove 5.

[0037] As one implementation method, such as Figure 5 As shown, the inner diameter of the spring coil 10 matches the outer diameter of the groove 9, and the outer diameter of the spring coil 10 matches the inner diameter of the slot 12.

[0038] In this embodiment, when the bottom end of the blind insert 2 coincides with the mold core 1, the slot 12 in the mounting hole 4 corresponds to the groove 9, which restricts the spring ring 10, improves the connection strength between the mold core 1 and the blind insert 2, and prevents the blind insert 2 from shaking due to excessive pressure when the glue groove 5 in the mold core 1 is filled.

[0039] As one implementation method, such as Figure 4 As shown, the bottom end of the blind insert 2 is chamfered, and the blind insert 2 is a hollow ring.

[0040] In this embodiment, when the bottom end of the blind insert 2 approaches the inner groove 5 of the mold core 1, the chamfering at the bottom end of the blind insert 2 prevents the blind insert 2 from colliding with the inner groove 5.

[0041] Working principle: Before use, insert the first guide pin 6 and the second guide pin 7 into the mounting hole 4 at the bottom of the mold core 1 at the same time, and attach the spring ring 10 to the first guide pin 6.

[0042] In use, the blind insert 2 is installed into the mold core 1 using a crane. Since the length of the first guide pin 6 is less than the length of the second guide pin 7, the guide hole 3 inside the blind insert 2 first contacts the top of the second guide pin 7, causing the blind insert 2 to move downward along the second guide pin 7. After the blind insert 2 has descended to a certain extent, the first guide pin 6 is then inserted into the internal guide hole 3. The blind insert 2 continues to move downward along the first guide pin 6 and the second guide pin 7, ensuring that the blind insert 2 falls vertically and preventing shaking. There is no need for manual positioning.

[0043] When the bottom of the blind insert 2 approaches the inner groove 5 of the mold core 1, the bottom of the blind insert 2 presses against the outside of the first guide pin 6 as the first guide pin 6 moves downward. After the spring ring 10 is inserted into the groove 9 outside the first guide pin 6, the spring ring 10 shrinks inward due to the design of the break 11. After shrinkage, the mounting hole 4 sleeves the outside of the spring ring 10 downward, increasing the friction between the blind insert 2 and the first guide pin 6. This slows down the descent speed of the blind insert 2 when the bottom of the blind insert 2 approaches the inner groove 5 of the mold core 1, preventing it from moving downward too fast and damaging the groove 5. When the slot 12 in the mounting hole 4 corresponds to the groove 9, it restricts the spring ring 10. At this time, the bottom of the blind insert 2 coincides with the mold core 1, further improving the connection stability between the blind insert 2 and the mold core 1.

[0044] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0045] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A guide insert mechanism for a plastic mold, comprising a mold core (1) and a glue groove (5) formed thereon on the mold core (1), the glue groove (5) being inverted stepped, wherein a blind insert (2) is detachably mounted on the top of the mold core (1), characterized in that, The blind insert (2) has several guide holes (3) inside, and the glue groove (5) has mounting holes (4) corresponding to the several guide holes (3) inside. The mounting holes (4) are inserted with a first guide pin (6) and a second guide pin (7). The bottom ends of the first guide pin (6) and the second guide pin (7) are both fixedly mounted with a hanging platform (8), and the length of the first guide pin (6) is less than the length of the second guide pin (7). The first guide pin (6) has a groove (9) on its outside and a spring ring (10) is sleeved on the top of the first guide pin (6). The spring ring (10) is used to slow down the speed at which the blind insert (2) moves outside the first guide pin (6). The inner wall of the guide hole (3) has a slot (12) and the groove (9) corresponds to the slot (12).

2. The plastic mold guide pin mechanism according to claim 1, characterized in that, The diameters of the first guide pin (6) and the second guide pin (7) are both matched with the diameter of the guide hole (3), and the first guide pin (6) and the second guide pin (7) are both inserted vertically into the guide hole (3).

3. The plastic mold guide pin mechanism according to claim 1, characterized in that, There are at least four sets of the first guide pin (6) and at least three sets of the second guide pin (7). The tops of the first guide pin (6) and the second guide pin (7) are both set to be inverted spherical. The first guide pin (6) is distributed at the bottom edge of the blind insert (2) and the second guide pin (7) is distributed at the bottom center of the blind insert (2).

4. The plastic mold guide pin mechanism according to claim 1, characterized in that, The spring coil (10) has a break (11) inside, and the spring coil (10) is a spring component.

5. The plastic mold guide pin mechanism according to claim 1, characterized in that, The inner diameter of the spring coil (10) matches the outer diameter of the groove (9), and the outer diameter of the spring coil (10) matches the inner diameter of the slot (12).

6. The plastic mold guide pin mechanism according to claim 1, characterized in that, The bottom end of the blind insert (2) is chamfered, and the blind insert (2) is a hollow ring.

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