Injection molding equipment for producing medical test kits

Abstract

The present invention relates to the field of injection molding technology for medical test kits, and discloses an injection molding device for producing medical test kits, including a fixed plate, a lower mold fixedly connected to the top of the fixed plate, an upper mold arranged above the lower mold, fixed rods fixedly connected to the left and right sides of the top of the fixed plate, an integrally formed support plate fixedly connected to the top of the two fixed rods, a hydraulic cylinder fixedly connected to the top of the support plate, an output end of the hydraulic cylinder passing through and slidably connected to the bottom of the support plate, and a fixed connection between the top of the upper mold. By starting the hydraulic cylinder, during the rising process of the upper mold, the interaction between the upper and lower limit plates formed after the cushion block is displaced to the inner top of the fixed tube can move the upper ejector rod and the simultaneously moving clamping block can eject the molded product out of the mold groove of the mold, facilitating the demoulding of the molded product.

Description

Technical Field

[0001] The invention relates to the technical field of medical kit injection molding, in particular to an injection molding device for producing a medical kit. Background Art

[0002] Medical test kits generally refer to boxes that contain chemical reagents for detecting chemical components, drug residues, virus types, etc. Their production process is generally through injection molding, which can improve the production efficiency of test kits.

[0003] However, the existing test kit injection mold is inconvenient to remove the material, and the molded product will stick to the mold and is difficult to remove, which brings inconvenience to the staff. In response to the above problems, technical personnel in this field provide an injection molding equipment for producing medical test kits. This invention has the advantage of being able to easily remove the finished injection molded test kit from the mold for easy removal, thus solving the problem of the inconvenience of demolding the finished injection molded test kit. Summary of the invention

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the present invention provides an injection molding device for producing a medical test kit, which has the advantages of conveniently removing the finished injection-molded test kit from the mold and facilitating taking it out, thereby solving the problem that the finished injection-molded test kit is difficult to demold.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of being able to conveniently remove the injection-molded finished product of the test kit from the mold for easy removal, the present invention provides the following technical solution: an injection molding device for producing a medical test kit, comprising a fixed plate, the top of the fixed plate is fixedly connected to a lower mold, an upper mold is arranged above the lower mold, the left and right sides of the top of the fixed plate are fixedly connected to fixed rods, the tops of the two fixed rods are fixedly connected to an integrally formed support plate, the top of the support plate is fixedly connected to a hydraulic cylinder, the output end of the hydraulic cylinder passes through and is slidably connected to the bottom of the support plate, the output end of the hydraulic cylinder is fixedly connected to the top of the upper mold, the left and right sides of the bottom of the upper mold are slidably connected to upper ejector rods, and the top ends of the two upper ejector rods pass through and extend to the top of the upper mold. The left and right sides of the top of the lower mold are slidably connected with a lower push rod, and the bottom ends of the two lower push rods pass through the lower mold and the fixed plate in sequence and are slidably connected to the bottom of the fixed plate, and the bottom ends of the two lower push rods and the top ends of the two upper push rods are fixedly connected to the limiting plate. The left and right sides of the upper mold are provided with a telescopic device, and the bottom ends of the two telescopic devices pass through and are slidably connected to the bottom of the fixed plate, and the two ends of the two telescopic devices are respectively fixedly connected to the four limit plates, and the outsides of the two upper push rods and the two lower push rods are covered with springs, the bottom ends of the two upper springs are fixedly connected to the upper mold, and the top ends of the two lower springs are fixedly connected to the fixed plate, and the ends of the four springs away from the upper mold are respectively fixedly connected to the four limit plates.

[0008] Preferably, the telescopic device includes two movable rods, the bottom end of the lower movable rod passes through and is slidably connected to the bottom of the fixed plate, the bottom end of the lower movable rod is fixedly connected to the lower limiting plate, the top end of the lower movable rod is fixedly connected to a fixed tube, a pad is provided inside the fixed tube, the top end of the upper movable rod is fixedly connected to the upper limiting plate, the bottom end of the upper movable rod passes through and is slidably connected to the inside of the fixed tube, and the bottom end of the upper movable rod is fixedly connected to the pad.

[0009] Preferably, a first card slot is opened on both sides of the bottom of the upper mold, and a second card slot is opened on both sides of the top of the lower mold. The inner sides of the two first card slots and the two second card slots are provided with card blocks, and the tops of the two upper card blocks are fixedly connected to the two upper push rods, respectively, and the bottoms of the two lower card blocks are fixedly connected to the two lower push rods, respectively.

[0010] Preferably, two limit devices are fixedly connected between the support plate and the upper die, and the two limit devices are respectively located on the left and right sides of the output end of the hydraulic cylinder.

[0011] Preferably, the limiting device includes a limiting tube, the top of the limiting tube is fixedly connected to the support plate, the inside of the limiting tube is slidably connected to a limiting rod, the bottom end of the limiting rod passes through and extends to the bottom of the limiting tube, and the bottom end of the limiting rod is fixedly connected to the upper mold.

[0012] Preferably, ejector pins are fixedly connected to both left and right sides of the bottom of the support plate, and the two ejector pins are respectively located directly above the two upper limit plates.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the present invention provides an injection molding device for producing a medical kit, which has the following beneficial effects:

[0015] 1. The injection molding equipment for producing medical test kits can form the test kits through the cooperation of the upper mold and the lower mold. Injection molding generally injects the raw materials into the mold groove between the upper mold and the lower mold after the mold is closed through the feed pipe. When the test kit is formed, it may stick to the mold groove of the upper mold or the lower mold. After the upper mold and the lower mold are closed, the four springs are in a natural stress state. It is necessary to ensure that the upper mold and the lower mold can normally form the test kit. When the hydraulic cylinder is started, the upper mold moves upward to separate the upper mold and the lower mold. The two upper ejectors, the two upper springs, and the two upper limit plates move upward with them, and the distance between them does not change. After rising a certain distance, due to the effect of the telescopic device, the upper two limit plates and the lower two The limit plates will pull each other, the upper limit plate moves downward and squeezes the upper spring and upper ejector rod, the lower limit plate moves upward and pushes the lower spring and lower ejector rod, so that one end of the upper ejector rod and the lower ejector rod move to the side opposite to the upper and lower dies, that is, the molded test kit between the upper and lower dies can be ejected for easy picking, no matter whether the molded product is stuck in the die groove of the upper or lower die, the upper ejector rod and the lower ejector rod can eject the molded product out of the die groove of the mold. The invention, by starting the hydraulic cylinder, during the rising process of the upper die, under the action of the telescopic device, the upper ejector rod and the lower ejector rod can move, and the molded product can be ejected out of the die groove of the mold, which is convenient for demolding of the molded product.

[0016] 2. In the injection molding equipment for producing medical test kits, when the upper mold moves upward, the upper movable rod and the cushion block also move upward synchronously. When the cushion block moves upward to the top of the inner side of the fixed tube, the upper movable rod pulls the lower movable rod. The interaction force between the two can drive the two upper ejector rods and the two lower ejector rods to eject the molded product out of the mold groove of the mold. At this time, the four springs are all compressed, and the upper ejector rod and the lower ejector rod do not clamp the molded product, which makes it easy to remove the molded product, because the cushion block pulls the fixed tube upward only after it moves a certain distance upward on the inner side of the fixed tube.

[0017] 3. The injection molding equipment for producing medical test kits can facilitate the stability of the upper ejector rod and the lower ejector rod after the upper mold and the lower mold are closed by setting the first card slot, the second card slot and the card block. After the upper mold and the lower mold are closed, the function of the spring is to ensure that the outer side of the card block is flush with the mold groove of the mold to ensure the integrity of the molded product. The spring plays a role in stabilizing and supporting the upper ejector rod and the lower ejector rod. In the process of the hydraulic cylinder controlling the descent of the upper mold, the spring is a process of gradually recovering from a compressed state to an initial state, which can ensure that the upper ejector rod, the lower ejector rod and the card block do not affect the injection molding of the product after the upper mold and the lower mold are combined.

[0018] 4. The injection molding equipment for producing medical test kits can increase the stability of the upper mold moving up and down through two limit devices to prevent the upper mold from shaking and tilting when moving up and down, thereby affecting the injection molding of the product.

[0019] 5. The injection molding equipment for producing medical test kits can slide up and down on the inner side of the limiting tube through the top of the limiting rod. The two sets of limiting rods and limiting tubes can increase the stability of the upper mold moving up and down, and are also in line with the trend of the hydraulic cylinder driving the upper mold to move up and down.

[0020] 6. In the injection molding equipment for producing medical test kits, after the upper mold moves upward, the ejector pin acts as a limiter. The upper limit plate touches the ejector pin first. When the limit plate touches the ejector pin, the hydraulic cylinder can be stopped to prevent the top of the upper mold from touching the limit tube after continuing to move upward. After the limit plate contacts the ejector pin, only the upper ejector rod moves downward, giving the upper mold a buffer time to stop. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front cross-sectional structural schematic diagram of the present invention;

[0022] Figure 2 For the present invention Figure 1 Enlarged structural diagram at A in the middle.

[0023] In the figure: 1. fixed plate; 2. lower die; 3. upper die; 4. fixed rod; 5. support plate; 6. hydraulic cylinder; 7. upper ejector rod; 8. lower ejector rod; 9. limit device; 901. limit tube; 902. limit rod; 10. limit plate; 11. telescopic device; 111. movable rod; 112. fixed tube; 113. cushion block; 12. spring; 13. first slot; 14. second slot; 15. block; 16. ejector pin. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1-2, an injection molding device for producing a medical test kit, comprising a fixed plate 1, a lower mold 2 is fixedly connected to the top of the fixed plate 1, an upper mold 3 is arranged above the lower mold 2, fixed rods 4 are fixedly connected to the left and right sides of the top of the fixed plate 1, and the tops of the two fixed rods 4 are fixedly connected to an integrally formed support plate 5, a hydraulic cylinder 6 is fixedly connected to the top of the support plate 5, the output end of the hydraulic cylinder 6 penetrates and is slidably connected to the bottom of the support plate 5, the output end of the hydraulic cylinder 6 is fixedly connected to the top of the upper mold 3, upper ejector rods 7 are slidably connected to the left and right sides of the bottom of the upper mold 3, the tops of the two upper ejector rods 7 penetrate and extend to the top of the upper mold 3, lower ejector rods 8 are slidably connected to the left and right sides of the top of the lower mold 2, and the bottom ends of the two lower ejector rods 8 are sequentially penetrated The lower mold 2 and the fixed plate 1 are passed through and slidably connected to the bottom of the fixed plate 1. The bottom ends of the two lower ejector rods 8 and the top ends of the two upper ejector rods 7 are fixedly connected to the limit plate 10. Telescopic devices 11 are provided on the left and right sides of the upper mold 3. The bottom ends of the two telescopic devices 11 pass through and are slidably connected to the bottom of the fixed plate 1. The two ends of the two telescopic devices 11 are respectively fixedly connected to the four limit plates 10. The outsides of the two upper ejector rods 7 and the two lower ejector rods 8 are sleeved with springs 12. The bottom ends of the two upper springs 12 are fixedly connected to the upper mold 3, and the top ends of the two lower springs 12 are fixedly connected to the fixed plate 1. The ends of the four springs 12 away from the upper mold 3 are respectively fixedly connected to the four limit plates 10. The upper mold 3 and the lower mold 2 can cooperate to form a test piece. The reagent box, injection molding generally injects the raw material into the mold groove between the upper mold 3 and the lower mold 2 after the mold is closed through the feed pipe. When the reagent box is formed, it may stick to the mold groove of the upper mold 3 or the lower mold 2. After the upper mold 3 and the lower mold 2 are closed, the four springs 12 are in a natural stress state, which needs to ensure that the upper mold 3 and the lower mold 2 can normally mold the reagent box. When the hydraulic cylinder 6 is started, the upper mold 3 moves upward to separate the upper mold 3 and the lower mold 2, and the two upper ejector rods 7, the upper two springs 12, and the upper two limit plates 10 move upward with them, and the distance between them does not change. After rising a certain distance, due to the action of the telescopic device 11, the upper two limit plates 10 and the lower two limit plates 10 will pull each other, and the upper limit plate 1 0 moves downward and squeezes the upper spring 12 and the upper ejector rod 7, and the lower limiting plate 10 moves upward and pushes the lower spring 12 and the lower ejector rod 8, so that one end of the upper ejector rod 7 and the lower ejector rod 8 move to the side opposite to the upper mold 3 and the lower mold 2, that is, the molded test kit between the upper mold 3 and the lower mold 2 can be ejected, which is convenient for picking up. No matter whether the molded product is stuck in the mold groove of the upper mold 3 or the lower mold 2, the upper ejector rod 7 and the lower ejector rod 8 can eject the molded product out of the mold groove of the mold. The invention, by starting the hydraulic cylinder 6, during the rising process of the upper mold 3, under the action of the telescopic device 11, the upper ejector rod 7 and the lower ejector rod 8 can move, and the molded product can be ejected out of the mold groove of the mold, which is convenient for demolding the molded product.

[0026] Furthermore, the telescopic device 11 includes two movable rods 111, the bottom end of the lower movable rod 111 passes through and is slidably connected to the bottom of the fixed plate 1, the bottom end of the lower movable rod 111 is fixedly connected to the lower limit plate 10, the top of the lower movable rod 111 is fixedly connected to a fixed tube 112, a cushion block 113 is provided inside the fixed tube 112, the top of the upper movable rod 111 is fixedly connected to the upper limit plate 10, the bottom end of the upper movable rod 111 passes through and is slidably connected to the inside of the fixed tube 112, the bottom end of the upper movable rod 111 is fixedly connected to the cushion block 113, and when the upper mold 3 moves upward, the upper movable rod 111 is The movable rod 111 and the cushion block 113 also move upward synchronously. When the cushion block 113 moves upward to the top of the inner side of the fixed tube 112, the upper movable rod 111 pulls the lower movable rod 111. The interaction force between the two can drive the two upper ejector rods 7 and the two lower ejector rods 8 to eject the molded product out of the mold groove of the mold. At this time, the four springs 12 are all compressed, and the upper ejector rod 7 and the lower ejector rod 8 do not clamp the molded product, which makes it easy to remove the molded product, because the cushion block 113 pulls the fixed tube 112 upward only after it moves a certain distance upward on the inner side of the fixed tube 112.

[0027] Furthermore, first card slots 13 are provided on both left and right sides of the bottom of the upper mold 3, and second card slots 14 are provided on both left and right sides of the top of the lower mold 2. Blocks 15 are provided on the inner sides of the two first card slots 13 and the two second card slots 14. The tops of the two upper card slots 15 are fixedly connected to the two upper ejector rods 7, respectively, and the bottoms of the two lower card slots 15 are fixedly connected to the two lower ejector rods 8, respectively. The first card slots 13, the second card slots 14 and the block 15 are provided to facilitate the clamping of the upper mold 3 and the lower mold 2. To stabilize the upper ejector rod 7 and the lower ejector rod 8, after the upper mold 3 and the lower mold 2 are closed, the function of the spring 12 is to ensure that the outer side of the block 15 is flush with the mold groove of the mold to ensure the integrity of the molded product. The spring 12 stabilizes and supports the upper ejector rod 7 and the lower ejector rod 8. In the process of the hydraulic cylinder 6 controlling the descent of the upper mold 3, the spring 12 gradually recovers from the compressed state to the initial state, which can ensure that the upper ejector rod 7, the lower ejector rod 8 and the block 15 do not affect the injection molding of the product after the upper mold 3 and the lower mold 2 are combined.

[0028] Furthermore, two limit devices 9 are fixedly connected between the support plate 5 and the upper mold 3. The two limit devices 9 are respectively located on the left and right sides of the output end of the hydraulic cylinder 6. The two limit devices 9 can increase the stability of the upper mold 3 moving up and down, thereby preventing the upper mold 3 from shaking and tilting when moving up and down, thereby affecting the injection molding of the product.

[0029] Furthermore, the limiting device 9 includes a limiting tube 901, the top of which is fixedly connected to the support plate 5, the internal sliding connection of the limiting tube 901 is connected to a limiting rod 902, the bottom end of the limiting rod 902 passes through and extends to the bottom of the limiting tube 901, the bottom end of the limiting rod 902 is fixedly connected to the upper mold 3, and the top end of the limiting rod 902 can slide up and down on the inner side of the limiting tube 901, the two sets of limiting rods 902 and limiting tubes 901 can increase the stability of the up and down movement of the upper mold 3, and are also in line with the trend of the hydraulic cylinder 6 driving the upper mold 3 to move up and down.

[0030] Furthermore, ejector pins 16 are fixedly connected to the left and right sides of the bottom of the support plate 5. The two ejector pins 16 are respectively located directly above the two upper limit plates 10. After the upper mold 3 moves upward, the ejector pins 16 play a limiting role. The upper limit plate 10 first touches the ejector pins 16. When the limit plate 10 touches the ejector pins 16, the hydraulic cylinder 6 can be stopped to prevent the top of the upper mold 3 from touching the limit tube 901 after continuing to move upward. After the limit plate 10 contacts the ejector pins 16, only the upper ejector rod 7 moves downward, giving the upper mold 3 a buffer time to stop.

[0031] It should be noted that the model of the hydraulic cylinder 6 used in the present invention may be HSGL01-G, and other electrical components that conform to the present invention may be used. It is provided with a matching control switch, and the installation position of the control switch can be selected according to actual needs, which will not be described one by one here.

[0032] Working principle: The test kit can be formed by the cooperation of the upper mold 3 and the lower mold 2. Injection molding generally injects the raw material into the mold groove between the upper mold 3 and the lower mold 2 after the mold is closed through the feed pipe. When the test kit is formed, it may stick to the mold groove of the upper mold 3 or the lower mold 2. After the upper mold 3 and the lower mold 2 are closed, the four springs 12 are in a natural stress state, and the four clamping blocks 15 are respectively located on the inner sides of the two first clamping grooves 13 and the two second clamping grooves 14, which can ensure that the test kit can be formed normally when the upper mold 3 and the lower mold 2 are closed. When the hydraulic cylinder 6 is started, the upper mold 3 moves upward to separate the upper mold 3 and the lower mold 2, and the two upper ejector rods 7, the two upper springs 12, and the two upper limit plates 10 move upward accordingly without changing the distance between them. After rising a certain distance, the top of the cushion block 113 contacts the top of the inner side of the fixed tube 112, and the upper two limit plates 10 and the lower two limit plates 10 will pass through the two The movable rods 111 pull each other, the upper limit plate 10 moves downward and squeezes the upper spring 12 and the upper ejector rod 7, the lower limit plate 10 moves upward and pushes the lower spring 12 and the lower ejector rod 8, so that the pads 113 at one end of the upper ejector rod 7 and the lower ejector rod 8 are moved to the side opposite to the upper mold 3 and the lower mold 2, that is, the molded test kit between the upper mold 3 and the lower mold 2 can be ejected, which is convenient for picking up. No matter whether the molded product is stuck in the mold groove of the upper mold 3 or the lower mold 2, the upper ejector rod 7 and the lower ejector rod 8 can eject the molded product out of the mold groove of the mold. In this invention, by starting the hydraulic cylinder 6, during the rising process of the upper mold 3, the interaction between the upper and lower limit plates 10 formed after the pad 113 is displaced to the inner top of the fixed tube 112 can make the upper ejector rod 7 and the lower ejector rod 8 move, and the clamping block 15 can eject the molded product out of the mold groove of the mold, which is convenient for demolding the molded product.

[0033] It should be noted that the various devices in this application are common devices in the market, and can be selected according to specific needs during specific use. The circuit connection relationship of each device belongs to a simple series and parallel connection circuit. There is no innovation in the circuit connection. Those skilled in the art can easily implement it. It belongs to the existing technology and will not be elaborated.

[0034] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection molding device for producing a medical kit, comprising a fixing plate (1), characterized in that: The top of the fixed plate (1) is fixedly connected to a lower die (2), an upper die (3) is provided above the lower die (2), the left and right sides of the top of the fixed plate (1) are fixedly connected to fixed rods (4), the tops of the two fixed rods (4) are fixedly connected to an integrally formed support plate (5), the top of the support plate (5) is fixedly connected to a hydraulic cylinder (6), the output end of the hydraulic cylinder (6) penetrates and is slidably connected to the bottom of the support plate (5), the output end of the hydraulic cylinder (6) is fixedly connected to the top of the upper die (3), the left and right sides of the bottom of the upper die (3) are slidably connected to upper ejector rods (7), the top ends of the two upper ejector rods (7) penetrate and extend to the top of the upper die (3), the left and right sides of the top of the lower die (2) are slidably connected to lower ejector rods (8), the bottom ends of the two lower ejector rods (8) penetrate the lower die in sequence, (2), a fixed plate (1) and slidably connected to the bottom of the fixed plate (1), the bottom ends of the two lower push rods (8) and the top ends of the two upper push rods (7) are fixedly connected to the limit plate (10), the left and right sides of the upper mold (3) are provided with telescopic devices (11), the bottom ends of the two telescopic devices (11) are penetrated and slidably connected to the bottom of the fixed plate (1), the two ends of the two telescopic devices (11) are respectively fixedly connected to the four limit plates (10), the outsides of the two upper push rods (7) and the two lower push rods (8) are respectively provided with springs (12), the bottom ends of the two upper springs (12) are fixedly connected to the upper mold (3), the top ends of the two lower springs (12) are fixedly connected to the fixed plate (1), and the ends of the four springs (12) away from the upper mold (3) are respectively fixedly connected to the four limit plates (10); The telescopic device (11) comprises two movable rods (111), the bottom end of the lower movable rod (111) passes through and is slidably connected to the bottom of the fixed plate (1), the bottom end of the lower movable rod (111) is fixedly connected to the lower limit plate (10), the top end of the lower movable rod (111) is fixedly connected to a fixed tube (112), a cushion block (113) is provided inside the fixed tube (112), the top end of the upper movable rod (111) is fixedly connected to the upper limit plate (10), the bottom end of the upper movable rod (111) passes through and is slidably connected to the inside of the fixed tube (112), and the bottom end of the upper movable rod (111) is fixedly connected to the cushion block (113); The upper mold (3) has first card slots (13) on both left and right sides of the bottom, and the lower mold (2) has second card slots (14) on both left and right sides of the top. The inner sides of the two first card slots (13) and the two second card slots (14) are provided with card blocks (15). The tops of the two upper card blocks (15) are fixedly connected to the two upper ejector rods (7) respectively, and the bottoms of the two lower card blocks (15) are fixedly connected to the two lower ejector rods (8) respectively.

2. The injection molding equipment for producing a medical kit according to claim 1, characterized in that: Two limit devices (9) are fixedly connected between the support plate (5) and the upper die (3), and the two limit devices (9) are respectively located on the left and right sides of the output end of the hydraulic cylinder (6).

3. The injection molding equipment for producing a medical kit according to claim 2, characterized in that: The limiting device (9) comprises a limiting tube (901), the top of the limiting tube (901) is fixedly connected to the support plate (5), the interior of the limiting tube (901) is slidably connected to a limiting rod (902), the bottom end of the limiting rod (902) penetrates and extends to the bottom of the limiting tube (901), and the bottom end of the limiting rod (902) is fixedly connected to the upper mold (3).

4. The injection molding equipment for producing a medical kit according to claim 1, characterized in that: Ejector pins (16) are fixedly connected to the left and right sides of the bottom of the support plate (5), and the two ejector pins (16) are respectively located directly above the two upper limit plates (10).

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