A lubricating structure for a pull rod mold transfer guide sleeve of an injection molding machine

Abstract

The present invention provides a lubricating structure for a tie rod and mold guide sleeve of an injection molding machine, comprising a movable template of the injection molding machine, a mold guide sleeve, a dust ring, a movable template cover, screws, and tie rods; tie rod through holes are provided on the movable template, and mold guide sleeves are provided inside each tie rod through hole, and the mold guide sleeves are connected and fixed in the tie rod through holes via the movable template cover using screws; an annular lubricating oil collecting groove is provided on the movable template cover, and a downward oil leakage hole and an oblique oil guide hole are provided at the bottom of the collecting groove; a half-moon-shaped oil collecting groove is provided on the lower side of the inner wall of the tie rod through hole of the movable template of the injection molding machine, and the bottom of the oil collecting groove is connected to the oil leakage outlet hole drilled into the surface of the movable template of the injection molding machine. The lubricating oil connecting the movable template of the injection molding machine and the tie rod is stored in a spiral oil groove in the mold guide sleeve. After the lubricating oil is brought out of the oil groove, the leaked lubricating oil is effectively discharged through the structural design of the present invention, which greatly improves the cleanliness of the large surface where the movable template mold is installed.

Description

Technical Field

[0001] The invention relates to the technical field of connection lubrication between a movable template and a pull rod of an injection molding machine, and in particular to a lubricating structure for a pull rod mold moving guide sleeve of an injection molding machine. Background Art

[0002] A mold transfer guide sleeve is used to achieve a sliding connection between the moving platen and the tie rod in the injection molding machine. The lubricating oil is injected into the parts that need lubrication through the lubricating oil filling port on the moving platen. The tie rod guide parts on the moving platen need to use a mold transfer guide sleeve. The lubricating oil is stored in the oil tank inside the mold transfer guide sleeve. When too much lubricating oil is added, it will overflow from the oil tank, flow to the moving platen cover through the large end surface of the mold transfer guide sleeve, and if it accumulates too much, it will overflow uncontrollably from the gap between the tie rod and the moving platen cover.

[0003] A dust ring is provided on the outside of the mold transfer guide sleeve to prevent external foreign particles from entering the sliding parts and damaging the contact surface. During each movement of the movable platen, the surface of the pull rod will pass through the oil groove of the mold transfer guide sleeve and be wrapped with an oil film. During the return stroke, part of the oil film will be scraped off by the dust ring. After a certain period of time, a large amount of lubricating oil will accumulate on the outside of the dust ring, causing it to flow out to the large mold installation surface of the movable platen. On the one hand, it will contaminate the mold clamping area, and on the other hand, it will cause a waste of lubricating grease. Within a certain period of time, the amount of lubricating grease in the movable platen cavity will be lost, and the lubricating oil needs to be replenished. Summary of the Invention

[0004] The purpose of the present invention is to solve the problem that the lubricating oil in the connection part between the traditional dynamic template and the pull rod leaks out uncontrollably, thereby contaminating the large surface on which the dynamic template mold is installed. The present invention provides a lubricating structure for the pull rod transfer guide sleeve of the injection molding machine, in which the lubricating oil connecting the dynamic template and the pull rod is stored in an oil tank inside the transfer guide sleeve. Due to the movement of the dynamic template, the lubricating oil is brought out of the oil tank, and the leaked lubricating oil is effectively discharged, thereby greatly improving the cleanliness of the large surface on which the dynamic template mold is installed.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An injection molding machine pull rod mold guide sleeve lubrication structure, comprising a moving template, a mold guide sleeve, a dust ring, a movable template pressure cover, screws and a pull rod; a pull rod through hole is provided on the moving template, and a mold guide sleeve is embedded in the inner side of the pull rod through hole; the movable template pressure cover is connected by screws to press the mold guide sleeve into the pull rod through hole of the moving template, and is characterized in that: the movable template pressure cover is also connected to the moving template by screws to press the mold guide sleeve; an annular groove is provided on the inner side of the movable template pressure cover, and a through pressure cover oil leakage hole is opened on the lower side of the annular groove. When assembled, The oil leakage hole of the pressure cover is kept vertically downward, and the annular groove is connected to the outside of the guide sleeve; a lubricating oil injection hole is provided on the upper side of the pull rod through hole of the movable template, and a semi-lunar oil collecting groove is provided on the lower side of the pull rod through hole of the movable template, and a blind hole extending from the surface of the movable template is provided at the bottom of the semi-lunar oil collecting groove, and the semi-lunar oil collecting groove is connected to the outside of the movable template; lubricating oil storage grooves are provided on the inner and outer surfaces of the mold shifting guide sleeve, and a through hole is provided on the upper side of the mold shifting guide sleeve, and the lubricating oil injection hole on the movable template is connected to the through hole of the mold shifting guide sleeve.

[0007] Preferably, the annular groove on the inner side of the movable template cover and the oil leakage hole of the cover form a passage for the lubricating oil to flow into the semi-lunar oil collecting groove of the movable template.

[0008] Preferably, an oblique through hole is provided on the side of the movable platen cover close to the die-shifting guide sleeve, and the oblique through hole connects the gap between the die-shifting guide sleeve and the movable platen cover with the semi-lunar oil collecting groove in the pull rod through hole to form a lubricating oil passage.

[0009] Preferably, the lubricating structure of the tie rod mold moving guide sleeve is arranged at the two tie rod through-hole positions on the upper side of the movable template, or at the four tie rod through-hole positions.

[0010] Preferably, the lubricating oil is injected from the lubricating oil injection hole of the movable template and flows to the outside of the mold transfer guide sleeve, filling the oil storage tank on the outside of the mold transfer guide sleeve, and then filling the oil storage tank on the inside of the guide sleeve after passing through the through hole of the mold transfer guide sleeve, and then wrapping the surface of the pull rod, so that the pull rod is fully lubricated when moving.

[0011] Preferably, a spiral oil storage groove is provided on the inner side of the mold shifting guide sleeve. After the lubricating oil wrapped on the surface of the pull rod is brought out of the oil groove by the pull rod, the lubricating oil is collected into the annular groove of the movable template pressure cover through the dust ring, and flows into the semi-lunar oil collecting groove on the lower side of the movable template pull rod through the oil leakage collection hole on the lower side of the movable template pressure cover. The lubricating oil overflows from the spiral oil storage groove on the inner side of the mold shifting guide sleeve through its large positioning end face and directly flows into the semi-lunar oil collecting groove through the oblique through hole. All leaked lubricating oil is discharged through the oil leakage outlet hole.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] (1) The structure of the present invention only includes the components of the injection molding machine moving template, the mold moving guide sleeve, the dust ring, the moving template pressure cover and the pull rod, without adding other structural parts, and the cost is low.

[0014] (2) The present invention is based on the conventional injection molding motorized template pull rod guide sleeve lubricating device structure, and the added design changes the structural form, which is simple to process.

[0015] (3) The leaked lubricating oil of the present invention is effectively discharged, which greatly improves the cleanliness of the large surface where the movable platen mold is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 This is a cross-sectional view of the movable template cover of the present invention along the axis through the oil leakage hole.

[0018] Figure 3 It is a schematic diagram of the dynamic template cover structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the mobile template structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the assembly relationship between the oil leakage outlet hole and the half-moon shaped oil collecting tank of the present invention.

[0021] Figure 6 It is a schematic diagram of the assembly relationship of the dynamic template gland, gland annular oil groove, gland oil leakage hole, and gland oblique oil guide hole of the present invention.

[0022] In the figure: 100-screw 200-moving platen cover 201-cover annular oil collecting groove

[0023] 202-Gland oil leakage hole 203-Gland oblique oil guide hole 300-Tie rod

[0024] 400-dustproof ring 500-movable template 501-oil leakage outlet hole

[0025] 502-semi-moon shaped oil collecting tank 600-mold transfer guide sleeve 601-spiral oil storage tank. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described 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, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of the present invention, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. used to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0028] In the description of this invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, the so-called connection can be a fixed connection, a removable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can also be internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this invention based on the specific circumstances.

[0029] See also Figures 1-6 , the present invention provides a technical solution:

[0030] A lubricating structure for a mold transfer guide sleeve of an injection molding machine, comprising a movable mold plate 500 of the injection molding machine, a mold transfer guide sleeve 600, a dust ring 400, a movable mold plate pressure cover 200 and a pull rod 300, as shown in FIG. Figure 1 As shown; four tie rod through holes are provided on the movable template 500 of the injection molding machine, as Figure 4 As shown, the lubricating structure of the tie rod guide sleeve of the injection molding machine can be arranged at the two tie rod through-hole positions on the upper side of the movable template 500 of the injection molding machine, or at the four tie rod through-hole positions;

[0031] The mold transfer guide sleeve 600 is embedded in the tie rod through hole of the movable mold plate 500 of the injection molding machine; the movable mold plate pressure cover 200 is connected to the movable mold plate 500 of the injection molding machine by screws, pressing the mold transfer guide sleeve 600 into the tie rod through hole of the movable mold plate 500 of the injection molding machine. There is a clearance fit between the mold transfer guide sleeve 600 and the tie rod 300, which facilitates flexible sliding between the two without damaging the oil film.

[0032] The inner side of the movable platen cover 200 is provided with an inner cover annular oil collecting groove 201, such as Figure 2 As shown. A through cover oil leakage hole 202 is opened on the lower side of the movable platen cover 200, so that the annular groove is connected to the outer side of the movable platen cover 200. Figure 3As shown. The annular oil collecting groove 201 on the inner side of the movable platen cover 200 and a through cover oil leakage hole 202 on the lower side of the groove form a passage for introducing lubricating oil into the semi-lunar oil collecting groove 502 of the movable platen 500 of the injection molding machine; at the same time, a cover oblique oil guide hole 203 can be directly opened on the side of the movable platen cover 200 close to the mold transfer guide sleeve 600 to connect the gap between the mold transfer guide sleeve 600 and the movable platen cover 200 with the semi-lunar oil collecting groove 502 of the movable platen of the injection molding machine, forming another lubricating oil passage. The two lubricating oil passages can be arranged either one or both at the same time, such as Figure 6 As shown;

[0033] The movable template 500 of the injection molding machine has a lubricating oil injection hole on the upper side of the pull rod through hole, and a semi-lunar oil collecting groove 502 is opened on the lower side of the pull rod through hole of the movable template 500 of the injection molding machine. The bottom of the semi-lunar oil collecting groove 502 has a blind hole drilled from the surface of the driven template, namely the oil leakage outlet hole 501, so that the semi-lunar groove cavity is connected to the outside of the movable template 500 of the injection molding machine. Figure 5 As shown;

[0034] The inner and outer surfaces of the mold transfer guide sleeve 600 are provided with lubricating oil storage tanks, and there is a through hole on the upper side thereof. The lubricating oil is injected from the through hole on the upper side of the injection molding machine movable template 500, so that the lubricating oil can flow into the inner and outer sides of the mold transfer guide sleeve 600. The lubricating oil injection hole of the injection molding machine movable template is connected to the oil leakage hole of the mold transfer guide sleeve 600.

[0035] The specific usage process is: after the lubricating oil is filled from the lubricating oil injection hole on the upper side of the injection molding machine moving template 500, it flows to the outside of the mold transfer guide sleeve 600, fills the oil storage tank on the outside of the mold transfer guide sleeve 600, passes through the through hole on the upper side of the mold transfer guide sleeve 600 and fills the spiral oil storage tank 601 inside the guide sleeve, so that the pull rod is fully lubricated when moving; when the pull rod moves forward out of the mold transfer guide sleeve 600, the lubricating oil is wrapped around the surface of the pull rod 300, and the lubricating oil is also brought out of the oil tank and lubricated through the dust ring 400. When the pull rod 600 retracts, the lubricating oil is scraped off the pull rod 600 and blocked on the periphery of the dust ring 400. It is finally collected by the annular groove of the passive template cover 200, flows into the semi-lunar groove on the lower side of the pull rod through hole of the injection molding machine movable template 500 through the oil leakage collection hole on the lower side of the movable template cover 200, and is discharged through the oil leakage outlet hole on the lower side of the pull rod through hole of the injection molding machine movable template 500, thereby achieving the function of controllable collection and discharge of lubricating oil, and improving the cleanliness of the large surface of the mold installation of the injection molding machine movable template 500.

[0036] While 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 these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A lubricating structure for a tie rod and mold guide sleeve of an injection molding machine, comprising a movable platen, a mold guide sleeve, a dust ring, a movable platen gland, screws, and a tie rod; the movable platen is provided with a tie rod through hole, into which the mold guide sleeve is embedded; the movable platen gland is connected by screws to press the mold guide sleeve into the tie rod through hole of the movable platen, characterized in that: The movable template pressure cover is also connected to the movable template by screws to press the mold moving guide sleeve; an annular groove is provided on the inner side of the movable template pressure cover, and a through pressure cover oil leakage hole is opened on the lower side of the annular groove. During assembly, the pressure cover oil leakage hole remains vertically downward, and the annular groove is connected to the outer side of the guide sleeve; a lubricating oil injection hole is provided on the upper side of the pull rod through hole of the movable template, and a semi-lunar oil collecting groove is provided on the lower side of the pull rod through hole of the movable template, and a blind hole extending from the surface of the movable template is provided at the bottom of the semi-lunar oil collecting groove, and the semi-lunar oil collecting groove is connected to the outside of the movable template; lubricating oil storage grooves are provided on the inner and outer surfaces of the mold moving guide sleeve, and a through hole is provided on the upper side of the mold moving guide sleeve, and the lubricating oil injection hole on the movable template is connected to the through hole of the mold moving guide sleeve; The annular groove on the inner side of the movable platen gland and the gland oil leakage hole form a passage for the lubricating oil to flow into the semi-lunar oil collecting groove of the movable platen; An oblique through hole is provided on the side of the movable platen cover close to the die-shifting guide sleeve. The oblique through hole connects the gap between the die-shifting guide sleeve and the movable platen cover with the semi-lunar oil collecting groove in the tie rod through hole, forming a lubricating oil passage. After the lubricating oil is filled from the lubricating oil injection hole on the upper side of the moving template of the injection molding machine, it flows to the outside of the mold transfer guide sleeve, fills the oil storage tank on the outside of the mold transfer guide sleeve, passes through the through hole on the upper side of the mold transfer guide sleeve and fills the spiral oil storage tank on the inside of the guide sleeve, so that the pull rod is fully lubricated when it moves; when the pull rod moves forward out of the mold transfer guide sleeve, the lubricating oil is wrapped on the surface of the pull rod, and the lubricating oil is also brought out of the oil tank, and the lubricating oil that passes through the dust ring is scraped off the pull rod when the pull rod retracts, and is blocked on the periphery of the dust ring, and is finally collected by the annular groove of the passive template cover, flows into the semi-moon groove on the lower side of the pull rod through the oil leakage collection hole on the lower side of the dynamic template cover, and is discharged through the oil leakage outlet hole on the lower side of the pull rod through the through hole of the moving template of the injection molding machine.

2. The lubricating structure for the mold transfer guide sleeve of the injection molding machine tie rod according to claim 1, characterized in that: The lubricating structure of the pull rod die-shifting guide sleeve is arranged at the two pull rod through-hole positions on the upper side of the movable template, or at the four pull rod through-hole positions.

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