Mold structure for gear demolding

Abstract

The utility model provides a mould structure for demoulding a gear, which comprises a fixed mould component and a movable mould component, the fixed mould component is directly connected with the movable mould component through a connecting piece, the fixed mould component comprises a top cover and an upper mould plate from top to bottom, a material injection port is arranged at the center of the top cover, and the lower end of the material injection port is aligned with the center of a shunting disc. The lower portion of each split flow of the split-flow disc is aligned with an upper die installed on the upper die plate, and material hooking needles are further installed in the top cover and correspond to the split flows. The movable mold assembly comprises a lower mold plate, a base, a push-off mechanism used for pushing out a product and a rotating mechanism used for screwing out threads of the product at the same time from top to bottom, the product and the mold are rotationally separated in the mode that a motor drives a gear set, and the push-off mechanism ejects the product out through external force and elastic force of a spring. The push-off mechanism and the rotating mechanism cooperatively operate to ensure that internal threads of products are completely removed, a plurality of products can be produced at the same time, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a mold structure for demoulding a gear. Background Art

[0002] In various fields, some containers have internal threads on the inside of their lids, which are tightened together with the threads of the container mouth. Generally, these lids are plastic products, such as bottle caps for beverage bottles and tube caps for sampling tubes. In addition to the common lids with internal threads, there are many other products with internal threads. To manufacture such plastic products with internal threads, a special injection mold is required. During mold production, a special internal thread demoulding mechanism needs to be designed. During demoulding, there may be problems with thread breakage, or the thread cannot be completely unscrewed, resulting in unqualified products and waste of raw materials. Utility Model Content

[0003] In order to achieve the above purpose and other purposes, the utility model is realized through the following technical scheme: a mold structure for gear demolding, the fixed mold assembly is placed on the movable mold assembly, and the movable mold assembly includes: a lower mold plate; a base, the lower mold plate is placed on the base; a pillar, the pillar is installed between the lower mold plate and the base; a push-off mechanism, a part of the push-off mechanism is installed in the lower mold plate, and the other part is installed on the base, which is used to push out the product for demolding; an umbrella top, the umbrella top is evenly distributed in the lower mold plate, and the top of the umbrella top is engaged with the thread of the product; a rotating mechanism, the rotating mechanism is installed in the lower mold plate, and the rotating mechanism drives the umbrella top to rotate during demolding.

[0004] In one embodiment, the rotating mechanism includes a motor, a driving gear, a transmission shaft, a first driven gear and a chain. The motor is installed on the side of the base, the driving gear is installed on the rotating shaft of the motor, the transmission shaft is embedded in the lower template, the lower end of the transmission shaft extends out of the lower template, and the first driven gear is installed at the lower end. The driving gear and the first driven gear are connected through the chain transmission.

[0005] In one embodiment, the rotating mechanism further includes a first bearing, a second driven gear, a second bearing and a third driven gear, the first bearing is mounted on the upper end of the transmission shaft, the second driven gear is mounted on the outer side of the first bearing, the second bearing is mounted on the lower end of the umbrella top, the third driven gear is mounted on the outer side of the second bearing, and the second driven gear and the third driven gear are meshed.

[0006] In one embodiment, the push-off mechanism includes a push plate and a first spring. The push plate is placed at the center of the upper end surface of the lower template. The first spring is provided between the lower end surface of the push plate and the lower template.

[0007] In one embodiment, the push-off mechanism also includes a seat ring, an umbrella top, a bottom plate, a lower mold core, and a spring rod. The seat rings are evenly embedded on the push plate, each of the seat rings corresponds to the position of each upper mold, the umbrella top is embedded and installed in the seat ring, the bottom plate is placed on the base, the lower end of the lower mold core is fixed on the bottom plate, the upper end of the lower mold core passes through the center of the umbrella top and moves with the bottom plate, the lower end of the spring rod is fixed on the base, and the upper end is fixed in the lower mold plate, and the upper and lower ends of the spring of the spring rod respectively press against the lower mold plate and the bottom plate.

[0008] In one embodiment, the upper end of the umbrella top is provided with a thread, and the upper end of the umbrella top enters the bottom of the upper mold to form a complete mold with the upper mold.

[0009] In one embodiment, the push-off mechanism further includes a limiting column, which is fixed on the bottom plate and moves with the bottom plate.

[0010] In one embodiment, the diverter plate includes a groove and a drainage hopper, wherein the groove diverges from the center position of the diverter plate to the edge position and extends downward to form the drainage hopper, and the drainage hopper is aligned with the center of the upper mold.

[0011] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the push-off mechanism and the rotating mechanism of the utility model cooperate to ensure that the internal thread of the product is completely ejected, and multiple products can be produced at the same time, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Shown is a schematic diagram of the utility model;

[0013] Figure 2 Shown is a cross-sectional view of the utility model;

[0014] Figure 3 Shown is the internal structure diagram of the movable mold component of the utility model.

[0015] 1-mold structure; 11-fixed mold assembly; 111-top cover; 112-upper mold plate; 113-injection port; 114-diverter plate; 1141-groove; 1142-drainage bucket; 115-hook needle; 116-upper mold; 1161-channel; 1162-mold cavity; 12-movable mold assembly; 121-lower mold plate; 122-base; 123-pillar; 124-push-off mechanism; 1241-push plate; 1242-first spring; 1243-seat ring; 1244- umbrella top; 1245- bottom plate; 1246- lower mold core; 1247- spring rod; 1248- second spring; 1249- limiting column; 125- rotating mechanism; 1251- motor; 1252- driving gear; 1253- transmission shaft; 1254- first driven gear; 1255- chain; 1256- first bearing; 1257- second driven gear; 1258- second bearing; 1259- third driven gear; 13- connecting piece. DETAILED DESCRIPTION

[0016] See also Figures 1 to 3 The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0017] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for the understanding and reading of those skilled in the art, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship, or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical contents disclosed by the utility model. At the same time, the terms such as "left", "right", "up", "down", and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of the relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the utility model.

[0018] like Figure 1 As shown, a gear demoulding mold structure 1 is used for demoulding products with internal threads, and the mold structure 1 includes a fixed mold assembly 11, a movable mold assembly 12 and a connecting piece 13. The fixed mold assembly 11 is placed above the movable mold assembly 12, and the fixed mold assembly 11 and the movable mold assembly 12 are connected and positioned by the connecting piece 13. The upper half of the connecting piece 13 is fixed on the fixed mold assembly 11, and the lower half is fixed on the movable mold assembly 12.

[0019] Please combine Figure 2 and Figure 3The fixed mold assembly 11 includes a top cover 111, an upper mold plate 112, a material injection port 113, a diverter plate 114, a material hooking needle 115 and an upper mold 116. The top cover 111 is installed above the upper mold plate 112. The material injection port 113 is installed in the middle position of the top cover 111, and the raw material enters the mold structure 1 from the material injection port 113; the diverter plate 114 is embedded and installed in the center position of the upper mold plate 112, and the lower end of the material injection port 113 passes through the top cover 111 and is aligned with the center of the diverter plate 114. The diverter plate 114 is used to divert the raw material into the mold; a plurality of material hooking needles 115 are evenly distributed in the top cover 111, and the lower ends of the material hooking needles 115 are against the edge of the diverter plate 114, and the material hooking needles 115 are used to hook away the waste before the product is poured; the upper mold 116 is embedded and installed in the upper mold plate 112, and the center of the upper mold 116 is aligned with the material hooking needle 115.

[0020] The diverter plate 114 is provided with radial grooves 1141, which extend radially from the center of the diverter plate 114 to the edge of the diverter plate 114, forming a drainage hopper 1142 downwardly, and the bottom end of the hook needle 114 is embedded in the groove 1141, and the bottom of the drainage hopper 1142 is aligned with the center of the upper mold 116.

[0021] The upper mold 116 is provided with a funnel-shaped channel 1161 which is wide at the top and narrow at the bottom. The upper end of the channel 1161 is aligned with the lower end of the drainage funnel 1142 and has the same size. A mold cavity 1162 is provided at the lower end of the upper mold 116, and the channel 1161 is communicated with the mold cavity 1162.

[0022] Specifically, the raw material is injected from the injection port 113 , flows into the diverter plate 114 , and is dispersed into each of the upper molds 116 along the groove 1141 . The raw material enters the upper mold 116 through the diversion funnel 1142 , and is injected into the mold cavity 1162 along the channel 1161 .

[0023] The movable mold assembly 12 includes a lower mold plate 121, a base 122, pillars 123, a push-off mechanism 124 and a rotating mechanism 125. The lower mold plate 121 is located below the upper mold plate 112 and is attached to the upper mold plate 112. The base 122 is provided below the lower mold plate 121, and the base 122 is in a mouth shape. A plurality of pillars 123 are provided between the lower mold plate 112 and the base 122 for support. The push-off mechanism 124 is installed in the lower mold plate 121 and on the base 122, and is used to push the product out of the mold. The rotating mechanism 125 is installed in the lower mold plate 121, and is used to remove the internal thread of the product.

[0024] The push-off mechanism 124 includes a push plate 1241, a first spring 1242, a seat ring 1243, an umbrella top 1244, a bottom plate 1245, a lower mold core 1246, a spring rod 1247, a second spring 1248 and a limiting column 1249. The push plate 1241 is placed at the center of the upper end surface of the lower mold plate 121, and the first spring 1242 is installed between the lower end surface of the push plate 1241 and the lower mold plate 121. The fixed mold assembly 11 is pressed on the movable mold assembly 12 When the first spring 1242 is in a compressed state, after the fixed mold assembly 11 is removed, the first spring 1242 generates a thrust on the push plate 1241 to facilitate demoulding; the seat ring 1243 is embedded in the push plate 1241, corresponding to the upper mold 116; the umbrella top 1244 is installed in the lower mold plate 121, and the upper end of the umbrella top 1244 passes through the seat ring 1243 and enters the mold cavity 1162. The upper end of the umbrella top 1244 is provided with a thread, which is in contact with the mold cavity 1162 forms a complete mold; the bottom plate 1245 is placed on the base 122, and the bottom plate 1245 can move toward the upper mold plate 112 under the action of external force; the lower end of the lower mold core 1246 is fixed on the bottom plate 1245, and the upper end passes through the center of the umbrella top 1244. The upper end surface of the lower mold core 1246 is flush with the upper end surface of the umbrella top 1244 in the initial state, and the lower mold core 1246 follows the movement of the bottom plate 1245 to eject the product ; The spring rod 1247 is also provided between the lower template 121 and the base 122, and the lower end of the spring rod 1247 is sleeved with the second spring 1248, the upper end of the second spring 1248 abuts against the lower template 121, and the lower end of the spring 1248 abuts against the bottom plate 1245, which is used for resetting the push-off mechanism 124; the limit column 1249 is fixedly installed on the bottom plate 1245, and the limit column 1249 limits the maximum distance of movement of the bottom plate 1245.

[0025] Specifically, the fixed mold assembly 11 is removed, and an external force applies a thrust to the bottom plate 1245, driving the lower mold core 1246 to move. At the same time, the first spring 1242 restores its length, pushing the push plate 1241 to move, driving the seat ring 1243 to move, the seat ring 1243 pushes the edge of the product, and the lower mold core 1246 pushes the center of the product, lifting the product from the umbrella top 1244 to demold it.

[0026] The rotating mechanism 125 includes a motor 1251, a driving gear 1252, a transmission shaft 1253, a first driven gear 1254, a chain 1255, a first bearing 1256, a second driven gear 1257, a second bearing 1258 and a third driven gear 1259. The motor 1251 is mounted on the side of the base 122, the driving gear 1252 is mounted on the rotating shaft of the motor 1251, the transmission shaft 1253 is mounted in the lower template 121, and the lower end of the transmission shaft 1253 is sleeved with the first The driven gear 1254, the driving gear 1252 and the first driven gear 1254 are connected for transmission through the chain 1255, the upper end of the transmission shaft 1253 is sleeved with the first bearing 1256, and the outer side of the first bearing 1256 is sleeved with the second driven gear 1257; the lower end of the umbrella top 1244 is sleeved with the second bearing 1258, and the outer side of the second bearing 1258 is sleeved with the third driven gear 1259, and the third driven gear 1259 is meshed with the second driven gear 1257.

[0027] Specifically, the motor 1251 drives the driving gear 1252 to rotate, the first driven gear 1254 is transmitted through the chain 1255, and the second driven gear 1257 is driven to rotate through the transmission shaft 1253, thereby driving the third driven gear 1259 to rotate, and the umbrella top 1244 rotates to separate the product and the thread of the umbrella top 1244.

[0028] The specific method of using the mold structure 1 is as follows: the fixed mold assembly 11 is placed on the movable mold assembly 12, the upper half of the connecting member 13 is fixed on the fixed mold assembly 11, and the lower half is fixed on the movable mold assembly 12, the raw material is poured in from the injection port 113, and enters the mold cavity 1162 after being diverted by the diverter plate 114. When the product is demoulded, the connecting piece 13 is removed, the fixed mold assembly 11 is moved away, the motor 1251 drives the driving gear 1252 to rotate, and the first driven gear 1254 is driven to rotate through the chain 1255, and the umbrella top 1244 is driven to rotate through the transmission shaft 1253, the second driven gear 1257, and the third driven gear 1259. The umbrella top 1244 is disengaged from the product thread. At the same time, an external force pushes the bottom plate 1245 to move toward the lower mold plate 121, driving the lower mold core 1246 to push the center of the product. When the first spring 1242 recovers its length, it pushes the push plate 1241, and the push plate 1241 drives the seat ring 1243 to move. The seat ring 1243 pushes the edge of the product to remove the product from the umbrella top 1244.

[0029] In summary, the push-off mechanism and the rotating mechanism of the utility model cooperate to ensure that the internal thread of the product is completely ejected, and multiple products can be produced at the same time, thereby improving production efficiency.

[0030] Therefore, the utility model effectively overcomes various shortcomings in the prior art and has a high industrial utilization value. The above embodiments are only illustrative of the principles and effects of the utility model, and are not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiments without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.

Claims

1. A mold structure for gear demoulding, characterized in that: The fixed mold assembly is placed on the movable mold assembly, and the movable mold assembly includes: Next template; A base, on which the lower template is placed; A support column installed between the lower template and the base; A push-off mechanism, a part of which is installed in the lower template and another part is installed on the base, and is used to push out the product for demoulding; Umbrella tops, the umbrella tops are evenly distributed in the lower template, and the top ends of the umbrella tops are engaged with the threads of the product; The rotating mechanism is installed in the lower template, and the rotating mechanism drives the umbrella top to rotate during demoulding.

2. A mold structure for gear demoulding according to claim 1, characterized in that: The rotating mechanism includes a motor, a driving gear, a transmission shaft, a first driven gear and a chain. The motor is installed on the side of the base, the driving gear is installed on the rotating shaft of the motor, the transmission shaft is embedded in the lower template, the lower end of the transmission shaft extends out of the lower template, and the first driven gear is installed at the lower end. The driving gear and the first driven gear are connected through the chain transmission.

3. A mold structure for demoulding a gear according to claim 2, characterized in that: The rotating mechanism also includes a first bearing, a second driven gear, a second bearing and a third driven gear. The upper end of the transmission shaft is fitted with the first bearing, the outer side of the first bearing is fitted with the second driven gear, the lower end of the umbrella top is fitted with the second bearing, the outer side of the second bearing is fitted with the third driven gear, and the second driven gear is meshed with the third driven gear.

4. The mold structure for gear demoulding according to claim 1, characterized in that: The push-off mechanism comprises a push plate and a first spring. The push plate is placed at the center of the upper end surface of the lower template. The first spring is arranged between the lower end surface of the push plate and the lower template.

5. The mold structure for gear demoulding according to claim 4, characterized in that: The push-off mechanism also includes a seat ring, a bottom plate, a lower mold core, and a spring rod. The push plate is evenly embedded in the seat ring, the umbrella top is embedded and installed in the seat ring, the bottom plate is placed on the base, the lower end of the lower mold core is fixed to the bottom plate, the upper end of the lower mold core passes through the center of the umbrella top and moves with the bottom plate, the lower end of the spring rod is fixed to the base, and the upper end is fixed in the lower mold plate, and the upper and lower ends of the spring of the spring rod respectively resist the lower mold plate and the bottom plate.

6. The mold structure for demoulding a gear according to claim 5, characterized in that: The push-off mechanism further includes a limiting column, which is fixed on the bottom plate and moves with the bottom plate.

7. The mold structure for gear demoulding according to claim 1, characterized in that: The fixed mold assembly includes a top cover, an upper mold plate, a material injection port, a diverter plate, a material hooking needle and an upper mold, wherein the upper mold plate is installed below the top cover; the material injection port is installed at the center of the top cover; the diverter plate is embedded in the upper mold plate, and the lower end of the material injection port is aligned with the center of the diverter plate; the material hooking needles are evenly distributed in the top cover, and the lower ends are against the edge of the diverter plate; the upper mold is installed in the upper mold plate, located below the diverter plate, and the lower end of each material hooking needle is aligned with the center of the upper mold.

8. The mold structure for gear demoulding according to claim 7, characterized in that: The diverter plate comprises a groove and a drainage hopper. The groove diverges from the center position of the diverter plate to the edge position and extends downward to form the drainage hopper. The drainage hopper is aligned with the center of the upper mold.

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