Mold for forming a hook and a latch

Abstract

The present application relates to a kind of mould for forming hook and bolt, including upper die body and lower die body, upper die body includes fixed die plate, upper die body is equipped with first cavity for forming hook, for forming the second cavity of bolt;Lower die body includes movable die plate, movable die plate is equipped with runner, for forming the first core of hook, for forming the second core of bolt, first core and second core are all communicated with runner;Fixed die plate is equipped with sliding slot, first passage and second passage, first passage is communicated with first cavity and sliding slot, second passage is communicated with second cavity and sliding slot, sliding slot is slidably provided with stopper in the opening direction of mould;The groove wall of sliding slot is equipped with installation groove, spring one is arranged in installation groove, spring one is located in the side of stopper away from movable die plate, the elastic force of spring one acts on stopper, spring one always drives stopper towards movable die plate movement;The present application is guaranteed by designing a kind of new injection molding structure, the high-quality injection of hook and bolt.

Description

Technical Field

[0001] This invention relates to the field of molds, and in particular to a mold for forming hooks and pins. Background Technology

[0002] A hook 71 and a pin 72, as shown Figure 12 As shown, both are plastic parts, formed by injection molding. In order to control the cost of the mold, the hook 71 and pin 72 are injection molded using a single mold.

[0003] During injection molding, the injection molding machine first injects hot-melt plastic into the molding cavity of the mold. Once the molding cavity is filled with hot-melt plastic, the injection stage of the product is complete. Subsequently, the injection molding machine continues to maintain a certain pressure, allowing hot-melt plastic to continuously enter the cavity to compensate for material cooling and shrinkage, ensuring that the product is molded completely and densely.

[0004] Due to the elongated shape of the hook 71, the molding cavity used to form the hook 71 is also very elongated. If only one channel is opened on the side wall of the molding cavity to connect with the main runner on the mold, insufficient pressure may occur during the pressure holding stage, preventing the hook 71 from being fully formed. To meet the pressure holding requirements of the hook 71, the traditional solution is to add another channel to ensure the pressure holding pressure.

[0005] However, adding channels would result in two streams of hot-melt plastic flowing into the molding cavity during the injection molding of hook 71. When these two streams merge, weld lines would form, affecting the product's appearance. Therefore, the traditional method of adding channels cannot meet the injection molding requirements of hook 71. Thus, a new mold structure needs to be designed to meet the pressure holding requirements of hook 71 while also preventing weld lines. Summary of the Invention

[0006] This application provides a mold for molding hooks and pins, and by designing a novel injection molding structure, ensures high-quality injection molding of hooks and pins.

[0007] The technical solution for a hook and pin forming mold provided in this application is as follows:

[0008] A mold for forming hooks and pins includes an upper mold body and a lower mold body. The upper mold body includes a fixed template and has a first cavity for forming hooks and a second cavity for forming pins. The lower mold body includes a movable template and has a flow channel, a first core for forming hooks, and a second core for forming pins. Both the first core and the second core are connected to the flow channel. When the mold is closed, the first core connects to the first cavity, and the second core connects to the second cavity. The mold is characterized in that:

[0009] The fixed template has a sliding groove, a first channel and a second channel. The first channel connects the first cavity and the sliding groove, and the second channel connects the second cavity and the sliding groove. A stop block is slidably arranged in the sliding groove along the mold opening direction. An installation groove is formed on the groove wall of the sliding groove. A spring is installed in the installation groove. The spring is located on the side of the stop block away from the moving template. The elastic force of the spring acts on the stop block. The spring always drives the stop block to move towards the moving template.

[0010] When the mold is closed, the spring presses the stop block against the moving template, and the stop block isolates the connection between the second channel and the slide. When the mold is injected, the hot melt plastic enters the slide through the first channel and pushes the stop block to slide away from the moving template, so that the second channel is connected to the slide.

[0011] By adopting the above technical solution, during mold closing and injection molding, the hot-melt plastic enters the first and second cores through the runner. Since the cavity formed by the second core and the second cavity is smaller than the cavity formed by the first core and the first cavity, the hot-melt plastic first fills the cavity formed by the second core and the second cavity, and then continues to fill the cavity formed by the first core and the first cavity. Once the cavity formed by the first core and the first cavity is full, the hot-melt plastic flows into the slide groove through the first channel, fills the slide groove, and pushes the stop block to slide away from the moving mold plate, causing the spring to be compressed. After the stop block slides, the slider removes the obstruction between the second channel and the slide groove. The hot-melt plastic in the second cavity flows into the chute through the second channel. The two streams of hot-melt plastic merge in the chute, and the cavity formed by the first core and the first cavity is connected to the cavity formed by the second core and the second cavity. This allows the hook and pin to be subjected to double pressure during the subsequent pressure-holding stage, ensuring the integrity of the hook and pin's molding. At the same time, the merging of the two streams of hot-melt plastic in the chute ensures that the weld line is formed in the waste material located in the chute, not on the hook and pin, thus guaranteeing the appearance quality of both.

[0012] Preferably, the moving template has a third channel, which connects the first core and the flow channel. When the mold is closed, the third channel and the first channel are respectively connected to the two end chambers of the first core.

[0013] By adopting the above technical solution, the hook is subjected to pressure at both ends during the pressure holding stage, thus ensuring the integrity of the hook forming to the greatest extent.

[0014] Preferably, a limiting block is detachably connected to the groove opening of the slide, and the limiting block is located on the side of the stop block near the moving template; when the mold opens, the spring presses the stop block against the limiting block; the first channel includes a channel one opened on the fixed template and a channel two opened on the limiting block, and the second channel includes a channel three opened on the fixed template and a channel four opened on the limiting block.

[0015] By adopting the above technical solution, the limit block is set to facilitate the installation of the stop block and prevent the stop block from falling out of the slide groove.

[0016] Preferably, the stop block is provided with a mating groove, and the mating groove is connected to the second channel when the mold is closed; the stop block is rotatably disposed in the slide groove, the stop block is provided with a first mating part, and the moving template is provided with a second mating part. During the mold opening and closing process, the first mating part and the second mating part convert the mold opening and closing force into a force that drives the stop block to rotate.

[0017] By adopting the above technical solution, the hot-melt plastic enters the slide and mating groove after passing through the first channel. After the mold injection and pressure holding are completed, injection waste will form in the slide and mating groove. During the mold opening process, the lower mold body moves away from the upper mold body. During this process, the spring returns and drives the stop block to move with the lower mold body, so that the stop block presses the waste onto the moving platen, causing the waste to move with the moving platen and separate from the slide, the first channel, and the second channel. Subsequently, after the stop block moves to the point of contact with the limit block, the stop block stops moving. At this time, the waste has completely separated from the first and second channels. Then, the first and second mating parts convert the mold opening force into a force to drive the stop block to rotate. When the stop block rotates, it will drive the waste to rotate together, causing the connection between the waste and the hook, and the connection between the waste and the pin to break, completing the separation of the waste from the hook and the pin, without the need for manual waste cutting.

[0018] Preferably, the first mating part includes a rod on the stop block, an inclined groove and a vertical groove on the rod, the inclined groove and the vertical groove being connected, and the vertical groove being located on the side of the inclined groove closer to the stop block; the second mating part includes a mounting base detachably mounted on the moving template, an insertion hole on the mounting base, and a drive rod on the mounting base, the end of the drive rod extending into the insertion hole; when the mold is closed, the drive rod inserts into the inclined groove to drive the stop block to rotate, and then the drive rod enters the vertical groove and slides in the vertical groove along the mold closing direction; during the process of the stop block being pushed away from the moving template by the hot melt plastic, the vertical groove is always located in the insertion hole; when the mold is opened, the mounting base moves away from the rod, and the drive rod drives the stop block to rotate when it slides into the inclined groove.

[0019] By adopting the above technical solution, during the mold opening process, the drive rod follows the movement of the lower mold body away from the upper mold body, and slides within the vertical groove. When the stop block moves to contact the limiting block, the drive rod remains within the vertical groove. Subsequently, as the drive rod continues to move, it enters the inclined groove and drives the insert rod and stop block to rotate. After the drive rod moves out of the inclined groove, a spring presses the stop block against the limiting block, restricting its rotation and preventing changes in the groove opening position, thus allowing the drive rod to smoothly insert into the inclined groove during subsequent mold closing.

[0020] Preferably, the mounting base has a tapered hole on the side facing the fixed template, the insertion hole is connected to the tapered hole, the diameter of the tapered hole gradually decreases from the side closer to the insertion hole to the side farther away from the insertion hole, the minimum diameter of the tapered hole is greater than the diameter of the insertion hole, when the mold is closed, the insertion rod passes through the tapered hole and is inserted into the insertion hole, the tapered hole is connected to the mating groove; the lower mold body includes two top plates, one of which is provided with a push rod, the top end of the push rod extends into the mounting base, and the top end face of the push rod is flush with the bottom wall of the tapered hole.

[0021] By adopting the above technical solution, when the hot-melt plastic flows into the mating groove, it also flows into the conical hole simultaneously, forming an inverted structure between the waste material flowing into the conical hole and the hole. This causes the waste material to remain on the moving platen during the subsequent mold opening process. When the injection molding machine drives the two top plates to move, the ejector pin pushes the waste material out of the conical hole, thereby achieving automatic waste material removal.

[0022] The main technical effects of this invention are reflected in the following aspects:

[0023] 1. By setting up structures such as baffles, the present invention enables the chambers used for molding the hook and pin to be connected after the hook and pin are formed, thereby sharing the holding pressure and ensuring the integrity of the injection molding of the two.

[0024] 2. This invention controls the welding line on the waste material, preventing the waste material from affecting the product;

[0025] 3. This invention converts the mold opening force into the force of the stop block rotation, thereby causing the stop block to rotate and separating the waste material from the hook and pin. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the mold in the closed state of this application.

[0027] Figure 2 This is a schematic diagram of the upper mold body.

[0028] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle.

[0029] Figure 4 This is a structural schematic diagram of the lower mold body.

[0030] Figure 5 yes Figure 4 A sectional view of the lower and middle mold body along line BB.

[0031] Figure 6 yes Figure 4 A magnified view of a section at point C.

[0032] Figure 7 yes Figure 1 A cross-sectional view of the middle mold along the DD line.

[0033] Figure 8 yes Figure 7 A magnified view of a section at point E in the middle.

[0034] Figure 9 This is a schematic diagram of the second mating part.

[0035] Figure 10 This is a structural diagram of the stop block and the first mating part.

[0036] Figure 11 yes Figure 5 A magnified view of a section at point F.

[0037] Figure 12 This is a structural diagram of the hook and pin.

[0038] Reference numerals: 1. Upper mold body; 11. Fixed mold plate; 12. First cavity; 13. Second cavity; 14. Slide groove; 15. First channel; 151. Channel one; 152. Channel two; 16. Second channel; 161. Channel three; 162. Channel four; 17. Mounting groove; 18. Limiting block; 2. Lower mold body; 21. Moving mold plate; 22. Runner; 23. First core; 24. Second core; 25. Third core; 26. Channel; 27. Base plate; 28. Mold foot; 291. Top plate; 292. Guide post; 292. Spring 2; 31. Stop block; 311. Mating groove; 32. Spring 1; 4. First mating part; 41. Insert rod; 42. Inclined groove; 43. Vertical groove; 5. Second mating part; 51. Mounting base; 511. Tapered hole; 52. Insertion hole; 53. Drive rod; 61. Push rod; 62. Top rod; 71. Hook; 72. Pin. Detailed Implementation

[0039] The present invention will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this application can be more easily understood and mastered.

[0040] Reference Figures 1-3 This embodiment of a mold for forming hooks and pins includes an upper mold body 1 and a lower mold body 2. The upper mold body 1 includes a fixed template 11, and the upper mold body 1 is provided with a plurality of first cavities 12 for forming hooks 71 and a plurality of second cavities 13 for forming pins 72.

[0041] Reference Figure 1 , Figure 4 and Figure 5 The lower mold body 2 includes a movable mold plate 21, a base plate 26, two mold feet 27, and two top plates 28. The two mold feet 27 connect the base plate 26 and the movable mold plate 21, and two guide pillars 291 are provided between the base plate 26 and the movable mold plate 21. The two top plates 28 are connected to each other and slide together along the mold opening direction on the two guide pillars 291. Each guide pillar 291 is fitted with a second spring 292, located on the side of the two top plates 28 closest to the movable mold plate 21. One end of each second spring 292 abuts against one of the top plates 28, and the other end abuts against the movable mold plate 21. When no external force is applied, the two second springs 292 press the two top plates 28 onto the base plate 26.

[0042] Reference Figure 2 , Figure 3 , Figure 4 , Figure 6 The moving mold plate 21 is provided with a flow channel 22, multiple first cores 23 for forming hooks 71, and multiple second cores 24 for forming pins 72. The multiple second cores 24 are all connected to the flow channel 22. The moving mold plate 21 is provided with multiple third channels 25, which connect the flow channel 22 and one side cavity of the multiple first cores 23. When the mold is closed, the multiple first cores 23 connect to multiple first cavities 12, and the multiple second cores 24 connect to multiple second cavities 13.

[0043] Reference Figures 1-4 , Figure 6 The mold template 11 has multiple grooves 14, multiple first channels 15, and multiple second channels 16. One groove 14 is located between two adjacent first cores 23 and two second cores 24. The first channel 15 connects the first cavity 12 with the groove 14, and the second channel 16 connects the second cavity 13 with the groove 14. When the mold is closed, the third channel 25 and the first channel 15 are respectively connected to the two end chambers of the first core 23.

[0044] Reference Figures 1-3 , Figure 7 , Figure 8A stop block 31 is slidably disposed within the slide groove 14 along the mold opening direction. The stop block 31 can also rotate relative to the fixed template 11. A mating groove 311 is provided on the end of the stop block 31 closest to the moving template 21. A limit block 18 is detachably connected to the opening of the slide groove 14, and the limit block 18 is located on the side of the stop block 31 closest to the moving template 21. The first channel 15 includes a channel one 151 formed on the fixed template 11 and a channel two 152 formed on the limit block 18. The second channel 16 includes a channel three 161 formed on the fixed template 11 and a channel four 162 formed on the limit block 18.

[0045] Reference Figure 1 , Figure 7 and Figure 8 A mounting groove 17 is provided on the groove wall of the slide 14 away from the moving template 21. A spring 32 is installed in the mounting groove 17. The spring 32 is located on the side of the stop block 31 away from the moving template 21. The elastic force of the spring 32 acts on the stop block 31, and the spring 32 always drives the stop block 31 to move towards the moving template 21. When the mold opens, the spring 32 presses the stop block 31 against the limiting block 18, preventing the stop block 31 from sliding and rotating. At this time, the stop block 31 isolates the connection between the second channel 16 and the slide 14. When the mold closes, the moving template 21 collides with the stop block 31 and pushes the stop block 31 to slide away from the moving template 21, so that the stop block 31 moves into the slide 14 and the spring 32 is compressed. When the mold is fully closed, the stop block 31 still isolates the connection between the second channel 16 and the slide 14. The mating groove 311 is located in the slide 14 and is connected to the second channel 16.

[0046] Reference Figures 1-3 , Figures 7-9 The stop block 31 is provided with a first mating part 4, and the moving template 21 is provided with a second mating part 5. During the mold opening and closing process, the first mating part 4 and the second mating part 5 convert the mold opening and closing force into a force that drives the stop block 31 to rotate. The first mating part 4 includes an insert rod 41 integrally formed on the end of the stop block 31 near the moving template 21, an inclined groove 42 and a vertical groove 43 provided on the insert rod 41. The inclined groove 42 and the vertical groove 43 are connected, and the vertical groove 43 is located on the side of the inclined groove 42 near the stop block 31.

[0047] Reference Figure 1 , Figures 4-6 , Figures 7-11The second mating part 5 includes a mounting base 51 detachably mounted on the moving template 21, an insertion hole 52 formed on the mounting base 51, and a drive rod 53 mounted on the mounting base 51, the end of which extends into the insertion hole 52. When the mold closes, the drive rod 53 first inserts into the inclined groove 42, thereby driving the stop block 31 to rotate. Subsequently, the drive rod 53 enters the vertical groove 43 and slides within the vertical groove 43 along the mold closing direction. As the stop block 31 is pushed away from the moving template 21 by the hot melt plastic, the vertical groove 43 remains within the insertion hole 52, preventing the hot melt plastic from filling into the vertical groove 43. When the mold opens, the mounting base 51 moves away from the insertion rod 41, and the drive rod 53 drives the stop block 31 to rotate when it slides into the inclined groove 42.

[0048] Reference Figure 1 , Figure 7 , Figure 8 , Figure 10 , Figure 11 A tapered hole 511 is provided on the side of the mounting base 51 facing the fixed template 11. An insertion hole 52 is provided on the wall of the tapered hole 511 away from the fixed template 11, and the insertion hole 52 is connected to the tapered hole 511. The diameter of the tapered hole 511 gradually decreases from the side closer to the insertion hole 52 to the side farther away from the insertion hole 52, and the minimum diameter of the tapered hole 511 is larger than the diameter of the insertion hole 52. When the mold is closed, the insertion rod 41 passes through the tapered hole 511 and is inserted into the insertion hole 52. The tapered hole 511 is connected to the mating groove 311.

[0049] Reference Figures 4-6 , Figure 11 A push rod 61 is provided on the top plate 28 near the moving template 21. The top end of the push rod 61 extends into the mounting base 51, and the top end face of the push rod 61 is flush with the bottom wall of the tapered hole 511. The top plate 28 near the moving template 21 is also provided with multiple push rods 62, the top ends of which extend into the first core 23 and the second core 24, respectively.

[0050] Reference Figures 1-11 The complete injection molding process of the mold in this application is as follows:

[0051] First, the injection molding machine controls the lower mold body 2 to move closer to the upper mold body 1, causing the mold to close. During this process, the insert rod 41 first passes through the tapered hole 511 and inserts into the insert hole 52. Then, the drive rod 53 moves into the inclined groove 42. During this process, due to the influence of the spring 32, the stop block 31 will only rotate. Subsequently, the drive rod 53 moves into the vertical groove 43, canceling its influence on the stop block 31. Then, the moving platen 21 moves to abut against the stop block 31 and pushes the stop block 31 to slide away from the moving platen 21, so that the stop block 31 moves into the slide groove 14, and the spring 32 is compressed. When the mold is fully closed, the stop block 31 still isolates the connection between the second channel 16 and the slide groove 14. The mating groove 311 is located in the slide groove 14 and is connected to the second channel 16.

[0052] Next, the injection molding machine injects hot melt plastic into the runner 22. The hot melt plastic flows through the runner 22 and multiple third channels 25 into the first core 23 and the second core 24. Since the cavity formed by the second core 24 and the second cavity 13 is smaller than the cavity formed by the first core 23 and the first cavity 12, the hot melt plastic will first fill the cavity formed by the second core 24 and the second cavity 13.

[0053] Subsequently, hot melt plastic will continue to fill the cavity formed by the first core 23 and the first cavity 12. Once the hot melt plastic has filled the cavity formed by the first core 23 and the first cavity 12, it will flow into the slide groove 14, the mating groove 311, and the conical hole 511 through the first channel 15. Then, it will fill the slide groove 14 and further push the stop block 31 to slide away from the moving template 21, so that the spring 32 will be further compressed (when the hot melt plastic flows into the conical hole 511, it will form an inverted structure with the conical hole 511, so that the waste material can remain on the moving template 21 after the mold is opened. When the hot melt plastic flows into the mating groove 311, it will fill the mating groove 311, so that when the stop block 31 rotates, it can drive the waste material to rotate as a whole through the waste material in the mating groove 311).

[0054] As the stop block 31 slides further away from the moving template 21, it removes its obstruction to the second channel 16 and the slide groove 14. The hot-melt plastic in the second cavity 13 flows into the slide groove 14 through the second channel 16. The two streams of hot-melt plastic merge in the slide groove 14, connecting the cavity formed by the first core 23 and the first cavity 12 with the cavity formed by the second core 24 and the second cavity 13. This allows the hook 71 and the pin 72 to be subjected to double pressure during the subsequent pressure holding stage, ensuring the complete molding of the hook 71 and the pin 72. At the same time, the merging of the two streams of hot-melt plastic in the slide groove 14 causes the weld line to be generated in the waste material located in the slide groove 14, rather than on the hook 71 and the pin 72, thus ensuring the appearance quality of both.

[0055] After the product pressure holding is completed, the injection molding machine controls the mold to open, driving the lower mold body 2 to move away from the fixed mold plate 11. During this process, the drive rod 53 slides in the vertical groove 43, and the spring 32 rebounds to drive the stop block 31 to move together with the lower mold body 2, so that the stop block 31 presses the waste material onto the moving mold plate 21, causing the waste material to move with the moving mold plate 21 and detach from the slide 14, the first channel 15, and the second channel 16.

[0056] Subsequently, once the stop block 31 moves to abut against the limit block 18, the stop block 31 stops moving, and the drive rod 53 remains in the vertical groove 43. The drive rod 53 then moves into the inclined groove 42 and drives the insert rod 41 and the stop block 31 to rotate. When the stop block 31 rotates, it causes the waste material to rotate as well, breaking the connection between the waste material and the hook 71, and the connection between the waste material and the pin 72, thus separating the waste material from the hook 71 and the pin 72 without requiring manual cutting.

[0057] Subsequently, as the moving mold plate 21 moves, the waste material is carried away from the fixed mold plate 11. After the mold is fully opened, the power column on the injection molding machine passes through the base plate 26 and pushes the two top plates 28 towards the moving mold plate 21. When the two top plates 28 slide, they drive multiple ejector rods 62 and multiple push rods 61 to move, and compress the two springs 292. When the multiple ejector rods 62 move, they push multiple hooks 71 and multiple pins 72 out of the moving mold plate 21, completing the demolding of the product. When the multiple push rods 61 move, they push the waste material out of the moving mold plate 21, completing the automatic removal of the waste material.

[0058] After the product and waste material have detached from the moving mold plate 21, the power column on the injection molding machine retracts, and the two springs 292 rebound, driving the two top plates 28, multiple ejector rods 62, and multiple push rods 61 to move and reset. Then, the injection molding machine controls the mold to close, and performs the injection molding operation for the next set of products.

[0059] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A mold for forming hooks and pins, comprising an upper mold body and a lower mold body, wherein the upper mold body includes a fixed template, and the upper mold body is provided with a first cavity for forming hooks and a second cavity for forming pins; the lower mold body includes a movable template, and the movable template is provided with a flow channel, a first core for forming hooks, and a second core for forming pins, wherein the first core and the second core are both connected to the flow channel; when the mold is closed, the first core is connected to the first cavity and the second core is connected to the second cavity, characterized in that: The fixed template has a sliding groove, a first channel and a second channel. The first channel connects the first cavity and the sliding groove, and the second channel connects the second cavity and the sliding groove. A stop block is slidably arranged in the sliding groove along the mold opening direction. An installation groove is formed on the groove wall of the sliding groove. A spring is installed in the installation groove. The spring is located on the side of the stop block away from the moving template. The elastic force of the spring acts on the stop block. The spring always drives the stop block to move towards the moving template. When the mold is closed, the spring presses the stop block against the moving template, and the stop block isolates the connection between the second channel and the slide groove; when the mold is injected, the hot melt plastic enters the slide groove through the first channel and pushes the stop block to slide away from the moving template, so that the second channel is connected to the slide groove. A limiting block is detachably connected to the groove opening of the slide, and the limiting block is located on the side of the stop block near the moving template; when the mold opens, the spring presses the stop block against the limiting block; the first channel includes a channel one opened on the fixed template and a channel two opened on the limiting block, and the second channel includes a channel three opened on the fixed template and a channel four opened on the limiting block. The stop block is provided with a mating groove. When the mold is closed, the mating groove is connected to the second channel. The stop block is rotatably disposed in the slide groove. The stop block is provided with a first mating part, and the moving template is provided with a second mating part. During the mold opening and closing process, the first mating part and the second mating part convert the mold opening and closing force into a force that drives the stop block to rotate. The first mating part includes an insert rod on the stop block, an inclined groove and a vertical groove on the insert rod, the inclined groove and the vertical groove being connected, and the vertical groove being located on the side of the inclined groove closer to the stop block; the second mating part includes a mounting base detachably mounted on the moving template, an insertion hole on the mounting base, and a drive rod on the mounting base, the end of the drive rod extending into the insertion hole; when the mold is closed, the drive rod inserts into the inclined groove to drive the stop block to rotate, and then the drive rod enters the vertical groove and slides in the vertical groove along the mold closing direction; as the stop block is pushed away from the moving template by the hot melt plastic, the vertical groove remains within the insertion hole; when the mold is opened, the mounting base moves away from the insert rod, and the drive rod drives the stop block to rotate when it slides into the inclined groove.

2. The mold for forming hooks and pins according to claim 1, characterized in that: The moving template has a third channel, which connects the first core and the flow channel. When the mold is closed, the third channel and the first channel are respectively connected to the two end chambers of the first core.

3. The mold for forming hooks and pins according to claim 1, characterized in that: The mounting base has a tapered hole on the side facing the fixed template. The insertion hole is connected to the tapered hole. The diameter of the tapered hole gradually decreases from the side closer to the insertion hole to the side farther away from the insertion hole. The minimum diameter of the tapered hole is larger than the diameter of the insertion hole. When the mold is closed, the insertion rod passes through the tapered hole and is inserted into the insertion hole. The tapered hole is connected to the mating groove. The lower mold body includes two top plates. One of the top plates is provided with a push rod. The top end of the push rod extends into the mounting base. The top end face of the push rod is flush with the bottom wall of the tapered hole.

Images