Anti-fracture mold structure of ejector sleeve

Abstract

The utility model relates to the technical field of ejector sleeve molds, and discloses an ejector sleeve anti-fracture mold structure which comprises a lower mold base, four corners of the top of the lower mold base are fixedly connected with stand columns, the tops of the four stand columns are fixedly connected with a same top plate, the top of the top plate is fixedly connected with an air cylinder, and the output end of the air cylinder is fixedly connected with an upper mold base. The upper die base is slidably connected with the stand column, the bottom of the upper die base is fixedly connected with an upper die plate, the top of the lower die base is fixedly connected with a lower die plate, a needle rod penetrating through the side wall of the lower die plate is slidably connected into a cavity of the lower die plate, the needle rod is inserted into the ejector sleeve, and a needle releasing mechanism is arranged at one end of the needle rod. According to the utility model, the needle rod is arranged in the cavity of the lower template, so that the inner needle of the ejector sleeve can be ensured to form a hollow structure in the forming process, and the needle rod can be separated from the cavity of the lower template through the needle releasing mechanism, so that the demolding of the ejector sleeve is facilitated, and the hollow structure of the inner needle of the ejector sleeve can be formed more simply and conveniently.

Description

Technical Field

[0001] This utility model relates to the field of ejector sleeve mold technology, and more specifically, to an anti-breakage mold structure for ejector sleeves. Background Technology

[0002] The ejector pin assembly is a common standard component consisting of an ejector sleeve and an inner ejector pin. It is mainly used when the product has a circular through hole or blind hole, and the glue area must be ejected. The ejector sleeve is generally mounted on the ejector plate, and the inner ejector pin is generally mounted on the base plate. When the mold is opened, the inner ejector pin is fixed on the base plate, and the ejector plate drives the ejector sleeve to eject the glue area covering the inner ejector pin.

[0003] A search revealed a Chinese patent (publication number: CN216465677U) disclosing "a mold structure for preventing ejector sleeve breakage, comprising a mold core, a B plate, an ejector plate, a base plate, an ejector sleeve, an inner ejector sleeve pin, a fixed protective sleeve, a movable protective sleeve, and a pad block. The mold core is embedded in the upper part of the B plate, the fixed protective sleeve is embedded in the lower part of the B plate, the head of the ejector sleeve is fixed inside the ejector plate, and the rod of the ejector sleeve slidably passes through the fixed protective sleeve along a first direction and then abuts against the mold core. The head of the inner ejector sleeve pin passes through..." The movable protective sleeve is slidably installed inside the base plate. The rod of the inner needle of the ejector sleeve slidably passes through the ejector sleeve and is inserted into the mold core along the first direction. A slide passage hole is provided on the base plate. The slide passage hole is stepped in shape with a smaller upper part and a larger lower part. The movable protective sleeve is stepped in shape with a smaller upper part and a larger lower part. It is slidably installed in the slide passage hole along the first direction. The interior of the movable protective sleeve is provided with a stepped through hole with a smaller upper part and a larger lower part. The inner needle of the ejector sleeve is installed in the stepped through hole, and the thickness of the head of the inner needle of the ejector sleeve is equal to the depth of the lower hole of the stepped through hole.

[0004] However, in the process of implementing the relevant technology, the above-mentioned patent has certain technical defects. Specifically, the patent uses a movable protective sleeve added to the base plate to make the inner needle of the ejector sleeve and the ejector sleeve move synchronously in the early stage of demolding. Then, when the clamping force is small, the inner needle of the ejector sleeve is pulled out of the ejector sleeve. At the same time, a fixed protective sleeve is added inside the B plate to strengthen the ejector sleeve. However, the ejector sleeve needs to be hollow after molding. The mold of the above-mentioned patent cannot mold the inner needle of the ejector sleeve into a hollow structure. Therefore, the patent has certain limitations. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a fracture-resistant mold structure for the ejector sleeve, which solves the problem that the inner needle of the ejector sleeve cannot be formed into a hollow structure in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a fracture-resistant mold structure for a sleeve ejector, comprising a lower mold base, with columns fixedly connected to the four corners of the top of the lower mold base, a top plate fixedly connected to the top of the four columns, a cylinder fixedly connected to the top of the top plate, an upper mold base fixedly connected to the output end of the cylinder, the upper mold base being slidably connected to the columns, an upper template fixedly connected to the bottom of the upper mold base, a lower template fixedly connected to the top of the lower mold base and slidingly engaging with the upper template, a needle rod slidably connected through the side wall of the lower template within the cavity of the lower template, the needle rod being inserted into the sleeve ejector, and a needle ejection mechanism provided at one end of the needle rod for driving the needle rod to detach from the cavity of the lower template.

[0007] As a preferred embodiment of this utility model, the needle removal mechanism includes a connecting plate, which is fixedly connected to one end of the needle rod. A movable rod penetrating the side wall of the lower mold base is fixedly connected to one end of the connecting plate. The movable rod is slidably connected to the side wall of the lower mold base. A movable seat is fixedly connected to the end of the movable rod away from the connecting plate. A driving member for driving the movable seat to move horizontally is provided on the inner side of the lower mold base.

[0008] As a preferred embodiment of this utility model, the driving component includes a lead screw rotatably connected to the inner side of the lower mold base, the lead screw being threadedly connected to the bottom end of the movable seat, and a motor being fixedly installed on the outer side of the lower mold base, the output shaft of the motor being fixedly connected to the lead screw.

[0009] As a preferred technical solution of this utility model, a demolding component is provided on the inner side of the lower mold base. The demolding component includes a plurality of ejector pins penetrating the top wall of the lower mold base. The plurality of ejector pins are slidably connected to the top wall of the lower mold base. The plurality of ejector pins can extend upward into the cavity of the lower mold plate. The top ends of the plurality of ejector pins are fixedly connected to the same mounting plate. A protrusion is fixedly connected to one end of the bottom of the mounting plate. An arc-shaped top block is fixedly connected to one end of the top of the movable seat. The arc-shaped top block abuts against the protrusion by cooperating with the translation of the movable seat.

[0010] As a preferred embodiment of this utility model, springs are fitted on each of the ejector pins, the top ends of the springs abut against the top wall of the lower mold base, and the bottom ends of the springs abut against the mounting plate.

[0011] As a preferred technical solution of this utility model, a limiting block is fixedly connected to the middle of each of the several ejector pins, and a number of mounting grooves that slide and cooperate with the limiting block are opened on the inner side of the lower template.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. The upper and lower mold plates are matched by the control cylinder to complete the forming of the ejector sleeve. By setting the needle rod in the cavity of the lower mold plate, the needle inside the ejector sleeve can be made into a hollow structure during the forming process. The needle rod can be separated from the cavity of the lower mold plate by the needle removal mechanism, which facilitates the demolding of the ejector sleeve. This structure makes the formation of the hollow structure of the needle inside the ejector sleeve simpler.

[0014] 2. By starting the motor to drive the lead screw to rotate, the movable seat moves along the axis of the lead screw. This allows the movable seat to drive the movable rod to slide outside the lower mold base, causing the connecting plate to drive the pin rod to slide out of the cavity of the lower mold plate until it is completely separated from the cavity of the lower mold plate. At this time, the arc-shaped top block and the protrusion abut against each other, causing the protrusion to be squeezed and move upward. This causes the mounting plate to drive all the ejector pins to push upward, so that the ejector sleeve in the cavity of the lower mold plate is pushed out by ejector pins in multiple different positions, thereby achieving rapid demolding of the ejector sleeve. Because the ejector sleeve is subjected to uniform force during demolding, the problem of excessive local force on the ejector sleeve and breakage can be avoided. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the anti-breakage mold structure for a sleeve ejector according to the present invention;

[0016] Figure 2 This is a partial structural schematic diagram of the present invention;

[0017] Figure 3 This is a schematic diagram of the needle removal mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the demolding component of this utility model;

[0019] Figure 5 for Figure 4 An enlarged structural diagram of part A.

[0020] In the diagram: 1. Lower mold base; 2. Column; 3. Top plate; 4. Upper mold base; 5. Upper template; 6. Lower template; 7. Needle rod; 8. Sleeve; 9. Needle ejection mechanism; 91. Connecting plate; 92. Movable rod; 93. Movable seat; 94. Lead screw; 95. Motor; 96. Ejector component; 961. Mounting plate; 962. Ejector pin; 963. Protrusion; 964. Arc-shaped top block; 965. Spring; 966. Mounting groove; 967. Limiting block; 10. Cylinder. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 5 As shown, this utility model provides a fracture-resistant mold structure for a sleeve, including a lower mold base 1. Each of the four corners of the top of the lower mold base 1 is fixedly connected to a column 2. The top of the four columns 2 is fixedly connected to the same top plate 3. A cylinder 10 is fixedly connected to the top of the top plate 3. The output end of the cylinder 10 is fixedly connected to an upper mold base 4. The upper mold base 4 is slidably connected to the column 2. An upper template 5 is fixedly connected to the bottom of the upper mold base 4. A lower template 6, which slidably engages with the upper template 5, is fixedly connected to the top of the lower mold base 1. A needle rod 7, penetrating the side wall of the lower template 6, is slidably connected inside the cavity of the lower template 6. The needle rod 7 is inserted into the sleeve 8. One end of the needle rod 7 is provided with a needle release mechanism 9 for driving the needle rod 7 to detach from the cavity of the lower template 6.

[0023] The upper mold plate 5 and the lower mold plate 6 are coordinated by the control cylinder 10 to complete the molding of the ejector sleeve 8. By setting the needle rod 7 in the cavity of the lower mold plate 6, the needle inside the ejector sleeve can be made hollow during the molding process. The needle rod 7 can be separated from the cavity of the lower mold plate 6 by the needle removal mechanism 9, which facilitates the demolding of the ejector sleeve 8. This structure makes the formation of the hollow structure of the needle inside the ejector sleeve simpler.

[0024] The needle removal mechanism 9 includes a connecting plate 91, which is fixedly connected to one end of the needle bar 7. A movable rod 92 that penetrates the side wall of the lower mold base 1 is fixedly connected to one end of the connecting plate 91. The movable rod 92 is slidably connected to the side wall of the lower mold base 1. A movable seat 93 is fixedly connected to the end of the movable rod 92 away from the connecting plate 91. A driving component for driving the movable seat 93 to move horizontally is provided on the inner side of the lower mold base 1. The driving component includes a lead screw 94 that is rotatably connected to the inner side of the lower mold base 1. The lead screw 94 is threadedly connected to the bottom end of the movable seat 93. A motor 95 is fixedly installed on the outer side of the lower mold base 1. The output shaft of the motor 95 is fixedly connected to the lead screw 94.

[0025] By starting the motor 95 to drive the lead screw 94 to rotate, the movable seat 93 is moved along the axis of the lead screw 94. This allows the movable seat 93 to drive the movable rod 92 to slide outside the lower mold base 1, so that the connecting plate 91 drives the needle rod 7 to slide out of the cavity of the lower mold plate 6 until it is completely separated from the cavity of the lower mold plate 6, thus making it easy to demold the ejector sleeve 8.

[0026] The lower mold base 1 has an inner demolding component 96, which includes several ejector pins 962 penetrating the top wall of the lower mold base 1. All ejector pins 962 are slidably connected to the top wall of the lower mold base 1 and can slide upwards into the cavity of the lower mold plate 6. The top ends of the ejector pins 962 are fixedly connected to the same mounting plate 961. A protrusion 963 is fixedly connected to one end of the bottom of the mounting plate 961, and one end of the top of the movable seat 93 is fixedly connected to... There is an arc-shaped top block 964, which abuts against the protrusion 963 by the translation of the movable seat 93. A number of ejector pins 962 are fitted with springs 965. The top of the springs 965 abuts against the top wall of the lower mold base 1, and the bottom of the springs 965 abuts against the mounting plate 961. A limit block 967 is fixedly connected to the middle of the ejector pins 962. A number of mounting grooves 966 that slide with the limit block 967 are opened on the inner side of the lower mold plate 6.

[0027] Working principle: During demolding, the motor 95 drives the lead screw 94 to rotate, causing the movable seat 93 to translate along the axis of the lead screw 94. This allows the movable seat 93 to drive the movable rod 92 to slide outside the lower mold base 1, causing the connecting plate 91 to drive the pin rod 7 to slide out of the cavity of the lower mold plate 6 until it is completely separated from the cavity of the lower mold plate 6. At this time, the arc-shaped top block 964 abuts against the protrusion 963, causing the protrusion 963 to be squeezed and move upward. This causes the mounting plate 961 to drive all the ejector pins 962 to push upward, so that the ejector sleeve 8 in the cavity of the lower mold plate 6 is pushed out by multiple ejector pins 962 in different positions, thereby achieving rapid demolding of the ejector sleeve 8. Since the ejector sleeve 8 is subjected to uniform force during demolding, the problem of excessive local force and breakage of the ejector sleeve 8 can be avoided.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kind of anti-fracture mould structure of screw cylinder, including lower die seat (1), the top of the lower die seat (1) four corners are fixedly connected with stand column (2), the top of four stand column (2) is fixedly connected with the same top plate (3), the top of the top plate (3) is fixedly connected with air cylinder (10), it is characterized by: The output end of the air cylinder (10) is fixedly connected with an upper die seat (4), the upper die seat (4) is slidably connected with the column (2), the bottom of the upper die seat (4) is fixedly connected with an upper die plate (5), the top of the lower die seat (1) is fixedly connected with a lower die plate (6) which is slidably matched with the upper die plate (5), a needle bar (7) which penetrates through the side wall of the lower die plate (6) is slidably connected in the cavity of the lower die plate (6), the needle bar (7) is inserted into a plunger barrel (8), and one end of the needle bar (7) is provided with a needle stripping mechanism (9) for driving the needle bar (7) to be separated from the cavity of the lower die plate (6).

2. The breakage-proof mold structure for a boss cylinder according to claim 1, wherein: The needle stripping mechanism (9) comprises a connecting plate (91) which is fixedly connected at one end of the needle bar (7), one end of the connecting plate (91) is fixedly connected with a movable rod (92) which penetrates through the side wall of the lower die seat (1), the movable rod (92) is slidably connected with the side wall of the lower die seat (1), and the end of the movable rod (92) away from the connecting plate (91) is fixedly connected with a movable seat (93), and the inner side of the lower die seat (1) is provided with a driving piece for driving the movable seat (93) to translate in the horizontal direction.

3. A breakage-proof mold structure for a boss cylinder according to claim 2, characterized in that: The driving piece comprises a lead screw (94) which is rotatably connected to the inner side of the lower die seat (1), the lead screw (94) is threadedly connected with the bottom end of the movable seat (93), the outer side of the lower die seat (1) is fixedly installed with a motor (95), and the output shaft of the motor (95) is fixedly connected with the lead screw (94).

4. The breakage-proof mold structure for a boss cylinder according to claim 2, wherein: The inner side of the lower die seat (1) is provided with an ejection piece (96), the ejection piece (96) comprises a plurality of ejector pins (962) which penetrate through the top wall of the lower die seat (1), the plurality of ejector pins (962) are all slidably connected with the top wall of the lower die seat (1), the plurality of ejector pins (962) can extend into the cavity of the lower die plate (6) by upward sliding, the top ends of the plurality of ejector pins (962) are fixedly connected with the same mounting plate (961), one end of the bottom of the mounting plate (961) is fixedly connected with a protrusion (963), one end of the top of the movable seat (93) is fixedly connected with an arc top block (964), and the arc top block (964) is in abutment with the protrusion (963) by matching the translation of the movable seat (93).

5. A breakage-proof mold structure for a boss cylinder according to claim 4, characterized in that: A spring (965) is sleeved on each of the plurality of ejector pins (962), the top end of each of the plurality of springs (965) is in abutment with the top wall of the lower die seat (1), and the bottom end of each of the plurality of springs (965) is in abutment with the mounting plate (961).

6. A breakage-proof mold structure for a boss cylinder according to claim 5, characterized in that: The middle part of each of the plurality of ejector pins (962) is fixedly connected with a limiting block (967), and the inner side of the lower die plate (6) is provided with a plurality of mounting grooves (966) which are slidably matched with the limiting blocks (967).

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