Pen box outer frame precision mold

Abstract

The invention discloses a precision mold for an outer frame of a pen box, and belongs to the technical field of molds, the precision mold comprises a base, a lower mold and an upper mold, the lower mold is detachably mounted above the base, the lower mold and the upper mold are in contact with each other, and a plurality of mounting seats are fixedly connected to the middle of the upper end of the base; a positioning block is slidably connected to the interior of each mounting base, a product lining sliding strip is fixedly connected to the upper end of each positioning block, the product lining sliding strips are slidably connected with the mounting bases, the product lining sliding strips are connected with the lower mold in an inserted mode, and quick release mechanisms are arranged in the mounting bases; the side edge of the upper die is provided with a pressing rod through a stud, the bottom of the base makes contact with a backing ring, and a dismounting and mounting mechanism is jointly arranged between the backing ring and the base. According to the invention, the lining sliding strip of the product can be quickly replaced, and meanwhile, the problem of inaccurate mold closing can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and more specifically to a precision mold for a pencil case outer frame. Background Art

[0002] The injection mold for the outer frame of a pencil case is an injection molding tool used to produce the outer frame of a pencil case. This mold is usually composed of an upper mold and a lower mold. The molten plastic is injected into the mold cavity by an injection machine between the upper mold and the lower mold for molding. During the injection molding process, the cavity in the mold will cool and solidify according to the designed shape and size of the mold, and finally form the finished product of the outer frame of the pencil case.

[0003] After searching, the utility model patent with publication number CN219855760U discloses an injection mold for the upper cover of a pen case, including: a fixed mold base plate, with a feed port on the top side; a fixed mold plate, with a bottom side; a movable mold plate, with a core on the top side; the core and the movable mold plate fit together to form a closed molding space; an upper cover is molded in the molding space; a discharge mechanism is slidably arranged between the fixed mold plate and the movable mold plate, and the molded upper cover is located on the sliding route of the discharge mechanism; this scheme provides a discharge mechanism, and through two relatively arranged rocker arms arranged in the discharge mechanism, when the upper cover is demolded, the upper cover is first hooked up by two contact rods. If it is difficult to hook up, in order to protect the upper cover, the rocker arm will swing so that the two clamping blocks will clamp the upper cover, further improving the stability of discharge.

[0004] At present, in order to leave a special installation position inside the product, a slider or a slide bar is generally installed on the mold, and the slider or the slide bar will be inserted into the mold core, so as to leave the required position after the product is injected. However, the existing slider or the slide bar needs to be replaced frequently, and the traditional installation structure affects the replacement rate, which invisibly increases the downtime. Moreover, after repeated opening and closing of the mold, the precision will decrease, which not only affects the production of the product, but also causes irreversible damage to the mold itself. Therefore, we proposed a precision mold for the outer frame of a pencil case. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a precision mold for a pencil case outer frame, which can realize the rapid replacement of the inner lining slide of the product and solve the problem of inaccurate mold clamping.

[0006] To solve the above problems, the present invention adopts the following technical solutions:

[0007] A precision mold for a pencil case outer frame comprises a base, a lower mold and an upper mold, the lower mold is detachably installed on the top of the base, the lower mold and the upper mold are in contact with each other, a plurality of mounting seats are fixedly connected to the middle part of the upper end of the base, a positioning block is slidably connected to the inside of each mounting seat, the upper end of the positioning block is fixedly connected to a product lining slide, the product lining slide is slidably connected to the mounting seat, the product lining slide is plugged into the lower mold, a quick release mechanism is arranged inside the mounting seat, a pressure rod is installed on the side of the upper mold through stud bolts, a gasket is in contact with the bottom of the base, a disassembly and assembly mechanism is jointly arranged between the gasket and the base, the upper end edge of the gasket is fixedly connected to a fixing plate, the outer side of the fixing plate is slidably connected to a sloped seat, the sloped seat is in contact with both the lower mold and the upper mold, the sloped seat conflicts with the pressure rod, and a lubrication mechanism is arranged on the fixing plate.

[0008] As a preferred solution of the present invention, a guide column is fixedly connected to the inside of the inclined seat, and the guide column passes through the fixed plate and is slidably connected to the fixed plate. A spring 1 is sleeved on the outer side of the guide column, and one end of the spring 1 is fixedly connected to the fixed plate, and the other end of the spring 1 is fixedly connected to the inner surface of the inclined seat.

[0009] As a preferred solution of the present invention, the quick-release mechanism includes a slider slidably connected to the inside of the mounting seat, the upper end of the slider is fixedly connected with a clamping block, the clamping block passes through the mounting seat and is slidably connected to the mounting seat, the clamping block is clamped with a positioning block, the side of the clamping block is provided with a ball, the ball contacts the inner surface of the mounting seat, the upper end edge of the slider is fixedly connected with a push rod, the push rod passes through the mounting seat and is slidably connected to the mounting seat, the top of the push rod is fixedly connected with a pressing block, the bottom edge of the pressing block is fixedly connected with a protective cover, and the protective cover is fixedly connected to the mounting seat.

[0010] As a preferred solution of the present invention, a guide shell is fixedly connected to the inner bottom of the mounting seat, a guide block is slidably connected to the inner side of the guide shell, the guide block is fixedly connected to the slider, a spring 2 is arranged on the inner side of the guide shell, one end of the spring 2 is fixedly connected to the guide block, and the other end of the spring 2 is fixedly connected to the inner surface of the guide shell.

[0011] As a preferred solution of the present invention, the disassembly and assembly mechanism includes a locking block fixedly connected to the bottom of the base, the locking block is plugged into the gasket, the gasket is internally slidably connected with a locking pin, the locking pin is plugged into the locking block, a spring three is arranged inside the gasket, one end of the spring three is fixedly connected to the locking pin, the other end of the spring three is fixedly connected to the inner surface of the gasket, a lever is fixedly connected to the pin body of the locking pin, the lever is slidably connected to the gasket, a swivel arm is hinged inside the gasket, the end of the swivel arm is fixedly connected to a limiting ball, the limiting ball is clamped with the lever, and a pull ring is fixedly connected to the swivel arm.

[0012] As a preferred solution of the present invention, the lubrication mechanism includes a slide plate slidably connected to the inside of a fixed plate, a slide pin is fixedly connected to the upper end of the slide plate, the slide pin passes through the fixed plate and is slidably connected to the fixed plate, the slide pin contacts the inner surface of the inclined seat, a spring four is sleeved on the outer side of the pin body of the slide pin, a hollow plate is fixedly connected to the inside of the fixed plate and located below the slide plate, an oil storage sponge is in contact with the hollow plate and the slide plate, a connecting rod is fixedly connected to the bottom of the slide plate, the connecting rod passes through the oil storage sponge and is slidably connected to the oil storage sponge, the connecting rod passes through the hollow plate and is slidably connected to the hollow plate, a stopper is fixedly connected to the bottom of the connecting rod, the stopper contacts the hollow plate, and an oil outlet hole is opened inside the fixed plate.

[0013] As a preferred solution of the present invention, one end of the spring four is fixedly connected to the slide plate, and the other end of the spring four is fixedly connected to the inner surface of the fixed plate.

[0014] As a preferred solution of the present invention, a protrusion is fixedly connected to the inner top of the inclined seat, and the position of the protrusion corresponds to the sliding pin.

[0015] Compared with the prior art, the advantages of the present invention are:

[0016] (1) In the present invention, a plurality of mounting seats are provided on the base of the mold for mounting the product lining slide strip, and then a disassembly and assembly mechanism is provided in the mounting seats, wherein, under the action of a spring, a clamping block on the slider is inserted from the bottom into a positioning block at the bottom of the product lining slide strip, and then a push rod is provided on the slider for pushing the slider downward. In this way, in the later stage, the product lining slide strip can be replaced by only pushing the slider downward through the push rod so that the clamping block on the slider is separated from the positioning block, which is more convenient.

[0017] (2) In the present invention, a gasket is installed on the base, a fixing plate is arranged on the gasket, a sloped seat elastically supported by a guide column and a spring is arranged on the fixing plate, and then a pressure rod is arranged on the upper mold. Then, during the process of closing the upper mold and the lower mold, the pressure rod will squeeze the sloped seat to make it fit against the sides of the upper mold and the lower mold, thereby improving the accuracy of the mold closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 For the present invention Figure 1 The enlarged schematic diagram of point B in FIG.

[0020] Figure 3 For the present invention Figure 1 The enlarged schematic diagram of point C in FIG.

[0021] Figure 4 The present invention Figure 1 A three-dimensional diagram of the local structure;

[0022] Figure 5 For the present invention Figure 4 A front cross-sectional view of

[0023] Figure 6 For the present invention Figure 5 A is an enlarged schematic diagram.

[0024] Description of the numbers in the figure:

[0025] 1. Base; 2. Lower mold; 3. Upper mold; 4. Mounting seat; 5. Product lining slide; 6. Positioning block; 7. Quick release mechanism; 8. Pressure rod; 9. Gasket; 10. Disassembly and assembly mechanism; 11. Fixed plate; 12. Inclined seat; 13. Guide column; 14. Spring 1; 15. Lubrication mechanism; 71. Slider; 72. Block; 73. Ball; 74. Guide shell; 75. Guide block; 76. Spring 2; 7 7. Push rod; 78. Press block; 79. Protective cover; 101. Lock block; 102. Locking pin; 103. Spring three; 104. Push rod; 105. Rotating arm; 106. Limiting ball; 107. Pull ring; 151. Slide plate; 152. Sliding pin; 153. Spring four; 154. Hollow plate; 155. Oil storage sponge; 156. Connecting rod; 157. Stop block; 158. Oil outlet hole; 159. Bump. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Example:

[0030] See also Figure 1-6 A precision mold for a pen case outer frame includes a base 1, a lower mold 2 and an upper mold 3. The lower mold 2 is detachably mounted on the top of the base 1. The lower mold 2 and the upper mold 3 are in contact with each other. A plurality of mounting seats 4 are fixedly connected to the middle of the upper end of the base 1. A positioning block 6 is slidably connected to the inside of each mounting seat 4. A product lining slide 5 is fixedly connected to the upper end of the positioning block 6. The product lining slide 5 is slidably connected to the mounting seat 4. The product lining slide 5 is plugged into the lower mold 2. The product lining slide 5 is inserted into the lower mold 2, it will enter the mold core, the interior of the mounting seat 4 is provided with a quick-release mechanism 7, the side of the upper mold 3 is installed with a pressure rod 8 through a stud bolt, the bottom of the base 1 is in contact with a gasket 9, and a disassembly mechanism 10 is provided between the gasket 9 and the base 1, the upper end edge of the gasket 9 is fixedly connected with a fixing plate 11, the outer side of the fixing plate 11 is slidably connected with a ramp seat 12, the ramp seat 12 is in contact with both the lower mold 2 and the upper mold 3, the ramp seat 12 is in conflict with the pressure rod 8, and a lubrication mechanism 15 is provided on the fixing plate 11.

[0031] In this embodiment, when the upper mold 3 and the lower mold 2 are in the process of closing the mold, the pressure rod 8 contacts and squeezes the bevel seat 12, and the bevel seat 12 approaches the upper mold 3 and the lower mold 2 under the guidance of the guide column 13 until it is attached to the surface of the upper mold 3 and the lower mold 2, thereby improving the accuracy of the mold closing.

[0032] For details, please refer to Figure 1A guide column 13 is fixedly connected to the inside of the inclined surface seat 12. The guide column 13 passes through the fixed plate 11 and is slidably connected to the fixed plate 11. A spring 14 is sleeved on the outside of the guide column 13. One end of the spring 14 is fixedly connected to the fixed plate 11, and the other end of the spring 14 is fixedly connected to the inner surface of the inclined surface seat 12.

[0033] In this embodiment, the guide column 13 and the spring 14 are arranged to guide and assist in resetting the inclined plane seat 12 when it slides on the fixed plate 11 .

[0034] For details, please refer to Figure 5 as well as Figure 6 The quick-release mechanism 7 includes a slider 71 slidably connected to the inside of the mounting seat 4, a clamping block 72 is fixedly connected to the upper end of the slider 71, the clamping block 72 passes through the mounting seat 4 and is slidably connected to the mounting seat 4, the clamping block 72 is clamped with the positioning block 6, a ball 73 is provided on the side of the clamping block 72, the ball 73 contacts the inner surface of the mounting seat 4, a push rod 77 is fixedly connected to the upper end edge of the slider 71, the push rod 77 passes through the mounting seat 4 and is slidably connected to the mounting seat 4, a pressing block 78 is fixedly connected to the top of the push rod 77, a protective cover 79 is fixedly connected to the bottom edge of the pressing block 78, and the protective cover 79 is fixedly connected to the mounting seat 4.

[0035] In this embodiment, the quick-release mechanism 7 is provided to cooperate with the positioning block 6 to facilitate the removal and replacement of the product lining slide 5 on the mounting seat 4.

[0036] For details, please refer to Figure 6 A guide shell 74 is fixedly connected to the inner bottom of the mounting seat 4, a guide block 75 is slidably connected to the inner side of the guide shell 74, the guide block 75 is fixedly connected to the slider 71, a spring 2 76 is provided on the inner side of the guide shell 74, one end of the spring 2 76 is fixedly connected to the guide block 75, and the other end of the spring 2 76 is fixedly connected to the inner surface of the guide shell 74.

[0037] In this embodiment, the guide housing 74 , the guide block 75 and the second spring 76 are provided to elastically support the slider 71 .

[0038] For details, please refer to Figure 1 as well as Figure 2The disassembly and assembly mechanism 10 includes a locking block 101 fixedly connected to the bottom of the base 1, the locking block 101 is plugged into the gasket 9, and a locking pin 102 is slidably connected inside the gasket 9, and the locking pin 102 is plugged into the locking block 101. A spring three 103 is arranged inside the gasket 9, one end of the spring three 103 is fixedly connected to the locking pin 102, and the other end of the spring three 103 is fixedly connected to the inner surface of the gasket 9, a lever 104 is fixedly connected to the pin body of the locking pin 102, and the lever 104 is slidably connected to the gasket 9, a rotating arm 105 is hinged inside the gasket 9, and the end of the rotating arm 105 is fixedly connected to a limiting ball 106, and the limiting ball 106 is clamped with the lever 104, and a pull ring 107 is fixedly connected to the rotating arm 105.

[0039] In this embodiment, the disassembly and assembly mechanism 10 is provided to facilitate the installation of the gasket 9 and the components on the gasket 9 on the base 1 .

[0040] For details, please refer to Figure 1 as well as Figure 3 The lubrication mechanism 15 includes a slide plate 151 slidably connected to the inside of the fixed plate 11, a slide pin 152 is fixedly connected to the upper end of the slide plate 151, the slide pin 152 penetrates the fixed plate 11 and is slidably connected to the fixed plate 11, the slide pin 152 abuts against the inner surface of the inclined seat 12, a spring 4 153 is sleeved on the outer side of the pin body of the slide pin 152, a hollow plate 154 is fixedly connected to the inside of the fixed plate 11 and located below the slide plate 151, and an oil storage sponge 155 is in contact with the hollow plate 154 and the slide plate 151. A connecting rod 156 is fixedly connected to the bottom of the slide plate 151, and the connecting rod 156 passes through the oil storage sponge 155 and is slidably connected to the oil storage sponge 155. The connecting rod 156 passes through the hollow plate 154 and is slidably connected to the hollow plate 154. A through hole is opened at the center of the hollow plate 154. The connecting rod 156 is located in the through hole and has a diameter smaller than the through hole. A stopper 157 is fixedly connected to the bottom of the connecting rod 156, and the stopper 157 is in contact with the hollow plate 154. An oil outlet hole 158 is opened inside the fixed plate 11.

[0041] In this embodiment, the lubrication mechanism 15 is provided to achieve automatic lubrication between the fixing plate 11 and the guide column 13 .

[0042] For details, please refer to Figure 3 One end of the spring four 153 is fixedly connected to the slide plate 151, and the other end of the spring four 153 is fixedly connected to the inner surface of the fixed plate 11.

[0043] In this embodiment, the spring 153 is provided to assist the sliding pin 152 in resetting.

[0044] For details, please refer to Figure 3A protrusion 159 is fixedly connected to the inner top of the inclined seat 12 , and the position of the protrusion 159 corresponds to the sliding pin 152 .

[0045] In this embodiment, the protrusion 159 can provide a reaction force to the sliding pin 152 .

[0046] Working principle: When in use, first install the pressure rod 8 on the side of the upper mold 3 through the stud bolts, then pull the locking pin 102 through the lever 104, the locking pin 102 slides in the gasket 9, and compresses the spring three 103, then keep the state of the locking pin 102, and place the gasket 9 at the bottom of the base 1, and the locking block 101 at the bottom of the base 1 is inserted into the gasket 9, then release the lever 104, the locking pin 102 is reset under the action of the spring three 103, and is laterally inserted into the locking block 101, thus completing the installation of the gasket 9 and the components on the gasket 9 on the base 1, then rotate the rotating arm 105 so that the limiting ball 106 at the end of the rotating arm 105 is stuck in the lever 104, so that the locking pin 102 can be locked and fixed;

[0047] When the upper mold 3 and the lower mold 2 are in the process of closing the mold, the pressure rod 8 contacts and squeezes the inclined plane seat 12, and the inclined plane seat 12 is guided by the guide column 13 to approach the upper mold 3 and the lower mold 2 until it is attached to the surface of the upper mold 3 and the lower mold 2, thereby improving the accuracy of the mold closing. In addition, during the relative sliding of the inclined plane seat 12 and the fixed plate 11, the sliding pin 152 is moved downward by the reaction force of the protrusion 159, and then the sliding pin 152 squeezes the oil storage sponge 155 through the slide plate 151, thereby releasing the lubricating oil in the oil storage sponge 155, and then the lubricating oil is added to the junction of the guide column 13 and the fixed plate 11 through the oil outlet hole 158, thereby ensuring that the inclined plane seat 12 slides smoothly and is not easy to get stuck;

[0048] Finally, if the product lining slide 5 needs to be replaced later, it is only necessary to push the push rod 77 through the pressing block 78, and the push rod 77 pushes the slider 71, the slider 71 moves downward, and the block 72 on the slider 71 is separated from the positioning block 6 at the bottom of the product lining slide 5, thereby releasing the restriction on the positioning block 6 and the product lining slide 5, and then the product lining slide 5 can be taken out from the side of the mounting seat 4 for replacement.

[0049] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the protection scope of the present invention.

Claims

1. A precision mold for a pencil case outer frame, comprising a base (1), a lower mold (2) and an upper mold (3), characterized in that: A lower mold (2) is detachably mounted on the top of the base (1); the lower mold (2) and the upper mold (3) are in contact with each other; a plurality of mounting seats (4) are fixedly connected to the middle of the upper end of the base (1); a positioning block (6) is slidably connected to the inside of each mounting seat (4); a product lining slide (5) is fixedly connected to the upper end of the positioning block (6); the product lining slide (5) is slidably connected to the mounting seat (4); the product lining slide (5) is plugged into the lower mold (2); a quick release mechanism (7) is arranged inside the mounting seat (4); The side of the upper mold (3) is installed with a pressure rod (8) through stud bolts, the bottom of the base (1) is in contact with a gasket (9), and a disassembly mechanism (10) is provided between the gasket (9) and the base (1). The upper edge of the gasket (9) is fixedly connected to a fixing plate (11), and the outer side of the fixing plate (11) is slidably connected to a bevel seat (12), and the bevel seat (12) is in contact with both the lower mold (2) and the upper mold (3), and the bevel seat (12) is in contact with the pressure rod (8), and a lubrication mechanism (15) is provided on the fixing plate (11).

2. A precision mold for a pencil case outer frame according to claim 1, characterized in that: A guide column (13) is fixedly connected inside the inclined surface seat (12), and the guide column (13) passes through the fixed plate (11) and is slidably connected to the fixed plate (11). A spring (14) is sleeved on the outer side of the guide column (13), and one end of the spring (14) is fixedly connected to the fixed plate (11), and the other end of the spring (14) is fixedly connected to the inner surface of the inclined surface seat (12).

3. The precision mold for the outer frame of a pencil case according to claim 1, characterized in that: The quick release mechanism (7) comprises a slider (71) slidably connected to the inside of the mounting seat (4); the upper end of the slider (71) is fixedly connected to a clamping block (72); the clamping block (72) penetrates the mounting seat (4) and is slidably connected to the mounting seat (4); the clamping block (72) is clamped with a positioning block (6); a ball (73) is provided on the side of the clamping block (72); the ball (73) contacts the inner surface of the mounting seat (4); the upper end edge of the slider (71) is fixedly connected to a push rod (77); the push rod (77) penetrates the mounting seat (4) and is slidably connected to the mounting seat (4); the top of the push rod (77) is fixedly connected to a pressing block (78); the bottom edge of the pressing block (78) is fixedly connected to a protective sleeve (79); the protective sleeve (79) is fixedly connected to the mounting seat (4).

4. A precision mold for a pencil case outer frame according to claim 3, characterized in that: A guide shell (74) is fixedly connected to the bottom inner side of the mounting seat (4), a guide block (75) is slidably connected to the inner side of the guide shell (74), the guide block (75) is fixedly connected to the slider (71), a second spring (76) is arranged on the inner side of the guide shell (74), one end of the second spring (76) is fixedly connected to the guide block (75), and the other end of the second spring (76) is fixedly connected to the inner surface of the guide shell (74).

5. The precision mold for the outer frame of a pencil case according to claim 1, characterized in that: The disassembly and assembly mechanism (10) comprises a locking block (101) fixedly connected to the bottom of the base (1); the locking block (101) is plugged into a gasket (9); a locking pin (102) is slidably connected inside the gasket (9); the locking pin (102) is plugged into the locking block (101); a spring (103) is arranged inside the gasket (9); one end of the spring (103) is fixedly connected to the locking pin (102); the spring (103) The other end is fixedly connected to the inner surface of the gasket (9); a lever (104) is fixedly connected to the pin body of the locking pin (102); the lever (104) is slidably connected to the gasket (9); a rotating arm (105) is hinged inside the gasket (9); a limiting ball (106) is fixedly connected to the end of the rotating arm (105); the limiting ball (106) is clamped with the lever (104); and a pull ring (107) is fixedly connected to the rotating arm (105).

6. The precision mold for the outer frame of a pencil case according to claim 1, characterized in that: The lubricating mechanism (15) comprises a slide plate (151) slidably connected to the interior of the fixed plate (11); a slide pin (152) is fixedly connected to the upper end of the slide plate (151); the slide pin (152) penetrates the fixed plate (11) and is slidably connected to the fixed plate (11); the slide pin (152) abuts against the inner surface of the inclined seat (12); a spring (153) is sleeved on the outer side of the pin body of the slide pin (152); a hollow plate (154) is fixedly connected to the interior of the fixed plate (11) and below the slide plate (151); the hollow plate (154) is The slide plates (151) are in contact with an oil storage sponge (155). The bottom of the slide plate (151) is fixedly connected with a connecting rod (156). The connecting rod (156) passes through the oil storage sponge (155) and is slidably connected to the oil storage sponge (155). The connecting rod (156) passes through the hollow plate (154) and is slidably connected to the hollow plate (154). The bottom of the connecting rod (156) is fixedly connected with a stopper (157). The stopper (157) is in contact with the hollow plate (154). An oil outlet hole (158) is provided inside the fixed plate (11).

7. A precision mold for a pencil case outer frame according to claim 6, characterized in that: One end of the spring four (153) is fixedly connected to the slide plate (151), and the other end of the spring four (153) is fixedly connected to the inner surface of the fixed plate (11).

8. The precision mold for the outer frame of a pencil case according to claim 6, characterized in that: A protrusion (159) is fixedly connected to the inner top of the inclined seat (12), and the position of the protrusion (159) corresponds to the sliding pin (152).

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